ROYAL OBSERVATORY, GREENWICH.
.DETERMINATIONS OF
LONGITUDE.
1888-1902.
GIFT OF
ASTBONGMICAL SOCIETY OP THE
PACIFIC
ASTRONOMY DEPT
LIBRARY
OF THE
ASTR ONOM.CAL SOCIETY
OF THE PACIFIC
ROYAL OBSERVATORY, GREENWICH.
TELEGRAPHIC DETERMINATIONS
OF
LONGITUDE
MADE IN THE YEARS 1888 TO 1902.
UNDER THE DIRECTION OF
SIR W. H. M. CHJJISTIE, K.C'.B., M.A., F.R.S.,
ASTRONOM EP.-RO Y AL.
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I N D E X.
PAGE
PREFACE ... ... T
PART I.
Telegraphic Determination of the Difference of Longitude between Paris and Greenwich in the year
1888 . .... . .... 1
Telegraphic Determination of the Difference of Longitude between Paris and Greenwich in the year
1892 ......... . ...... 113
Telegraphic Determination of the Difference of Longitude between Paris and Greenwich in the year
1902 ........ ....... 181
PART II.
1. Telegraphic Determinations of the Differences of Longitude between Greenwich, "Waterville,
Hazel Hill (Canso, Xova Scotia) and Montreal, in the year 1892 ...... 1
2. Telegraphic Determination of the Difference of Longitude between Greenwich and Killorglin in
the year 1898 . . . .....
PLATES.
I. Longitude, Paris Greenwich, 1888. Observing-room at Greenwich.
II. Longitude, Paris Greenwich, 1888. Observing-room at Montsouris.
III. Longitude, Paris Greenwich, 1888. Electrical Apparatus for registering observations and signals.
IV. Royal Observatory, Greenwich. Transit Pavilion.
V. Longitude, Paris Greenwich, 1892. Diagram of the Construction of the Striding Levels.
Diagram of Electrical Connections.
VI. Royal Observatory, Greenwich. Plan of the Front Court.
Plan of the Property of the Commercial Cable Company at Waterville
VII. Plan of a portion of M'Gill College grounds, Montreal.
Plan of a portion of the property of the Commercial Cable Company at Hazel Hill (Canso, K"ova Scotia).
500 Wt. 439f.. 2/06 N. & Co., Ltd.
ERRATA.
Pages 46 52. Insert at head of Columns 4, 5, 6, 7, 8, 9, 10 and 12 respectively : h m
Pages 205-208. 7*ertf under date in Column 1, from Sept. 21-Nov. 14, 10-440.
Pages 210-217. Inoert under date in Column 1, from Apr. 7-Nov. 4, 10'080.
P R B F A C B.
THIS volume contains the accounts of longitude determinations made by members of
the staff of the Royal Observatory in the years 1888 to 1902. These are divided into
two parts, (I.) the determination of the arc Paris Greenwich, and (II.) the determination
of the longitude of Montreal and of stations in the south-west of Ireland at the
extremity of the Great European arc in latitude 52.
PART I.
Longitude of Paris. The circumstances which led to the determination of the
longitude of Paris, simultaneously by two English and two French observers, in the
year 1888, are explained on p. 1.
The value found by the two English observers was 9 m 20 S> 85, and that found by
the French observers of the Service Geographique de 1'Armee was 9 m 21 S 'OG 1 .
The discordance between these two independent determinations led to a repetition of
the work in 1892, when the value found by the English observers was 9 m 20 8 79
and that by the French observers was 9 m 21 S- 05 2 , showing practically the same
discordance as before. The desirability of a re-determination was urged by the
International Geodetic Conference which met at Paris in 1898, and it was arranged,
in conjunction with M. Loewy, the Director of the National Observatory at Paris,
that a re-determination should be undertaken in concert by the two Observatories at
Paris and Greenwich. This determination was made in the Spring and Autumn of
1902 (see p. 181). The French observers in 1902 found the value 9 m 20 8 '974, and
the English observers obtained the value 9 m 20 S "932 (see p. 323). This latter result
agrees exactly with the value obtained by Professor Albrecht in his "Compensation"
of the European longitudes. 3
1 Monthly Notices of tlie Royal Astronomical Society, vol. li. p. 408.
'-' lleport to the Association Oeodosiquo Internationale, 1892, p. 260, Annexe A. iv.
3 Aftronomische XarJiricJiten, No. 3993, vol. 167 p. 157. The value of the English determination in
1902 adopted by Prof. Albrecht is 9'" zo^gig. This value is obtained by weighting the Spring and Autumn
results according to their probable errors. The reasons for the weights used in this volume are given on
P- 3 2 3-
VI TELEGRAPHIC DETERMINATION, 1888-1902.
PART II.
1. Lonc/itudc of Montreal, Waterville and Canxo (Nova Scotia}. The longitude
of Montreal was undertaken in concert with Professor M'Leod for the purpose of
supplementing previous trans -Atlantic determinations, of which there were three,
connecting the American stations with those in the Eastern Hemisphere. The first
of these was that made in 1866 under the direction of Dr. B. A. Gould 1 , which
connected Heart's Content, Newfoundland, with Greenwich, and in which the
longitude of Foilhomurrum, mentioned below, was incidentally determined. In
1869-70 the difference of longitude between Cambridge, Massachusetts and
Brest in France was determined by officers of the U.S. Coast Survey through the
then newly laid cable, but the stations were not at that time directly connected with
Greenwich. 2 Subsequently a cable was laid from Brest to England, and in 1872 the
U.S. Coast Survey determined the difference of longitude between St. Pierre Island,
Newfoundland, and Greenwich, by way of Brest. 8 The results of these three opera-
tions, together with a provisional result of the determination of the longitude of
Montreal 4 given in this volume, were used by the late Mr. C. A. Schott of the U.S.
Coast Survey Department to form a network 5 stretching from Greenwich to San
Francisco, from which the adjusted difference of longitude between Greenwich and
Montreal is found to be 4 h 54 m 18 S '634, agreeing almost precisely with the result
given on p. 124, y i z ->
4 h 54 m i8 s '62.
2. Longitude of Killorglin. For reasons given on p. 12u of Part II. of this
volume, it was thought desirable that as a supplement to the determinations of
the longitudes of Valentia and Waterville the longitude of a third station in the
neighbourhood of the Western end of the Great European arc of longitude should be
determined as a check on possible local attraction at those places. The principal station
of the Ordnance Survey at the Western end of the European arc is at Feaghmain
in the north-west of the island of Valentia. The astronomical longitude of this place
was found in 1844 by transmission of chronometers to be 41 m 23 8 '23 6 west of Greenwich
(Bradley's Meridian). The longitude of Knightstown in the north-east of Valentia
1 U.S. Coast Survey Eeport, 1 867, Appendix No. 6.
2 U.S. Coast Survey Eeport, 1874, p. 163, and Memoirs of the American Academy, vol. ix., p. 437.
3 U.S. Coast Survey Report, 1872, Appendix No. 13.
* 4 h 54 m i8 s -67.
5 U.S. Coast Survey Report, 1897, Part II., Appendix No. 2, and Astronomical Journal, No. 412.
6 Determination of the Longitude of Valentia by transmission of Chronometers, Appendix to Greenwich
Observations, 184;.
PREFACE. Vll
island was determined by telegraphic communication in 1862 and found to be
4'imgs.gii The astronomical longitude of a third station, Foilhomurrum, in the south of
the island, was found in the course of the work of the trans-Atlantic longitude
determination made in I860 by officers of the U.S. Coast Survey, to be 41 m 33 s 34'
west of the Greenwich Transit Circle.
The differences of Geodetic longitude between these three stations and Greenwich,
computed on the supposition that the network of the British and Irish Triangulation
as a whole is projected on to a spheroid whose semi-axes are a = 20, 926, 348 feet,
6 = 20,855,233 feet (Clarke's first values), are:
Feaghmain 3 10 20' 39"'88 = 41 m 22 S '66
Knightstown 4 101716 '4 1 = 41 9 '09
Foilhomurrum" 10 23 11 '38 = 41 3276
and comparing these with the astronomical longitudes, we have :
Feaghmain. Knightstown. Foilhomurrum.
Astronomical . . . 41 m 23 S "25* 41 m 9 S< 81 41 m 33 8 '34
Geodetic 41 22 '66 41 9 '09 41 32 '76
Astronomical Geodetic . +0'59 +072 + 0'58
Under the direction of the late Sir Charles Wilson and Col. Duncan A. Johnston,
the successive Directors General of the Ordnance Survey, the Geodetic longitudes of
the stations used at Waterville and Killorglin were computed with reference to the
station at Feaghmain whose longitude is given above. The resulting longitude of
Waterville, west of Greenwich, is 10 10' 13"'590 = 40 m 40 S '91, and Ballymacprier station
at Killorglin, 9 47' 25"'250 = 39 ra 9 e> 68, and the comparison between the astronomical
and geodetic results is :
Waterville. Killorglin.
Astronomical 40 m 41 8 '30 39 m 9 6 '85
Geodetic . 40 40 '93* 39 9 70*
Astronomical Geodetic . .' . +0'37 +0'15
1 Longitude of Valentia by Galvanic Signals, Appendix III. to Greenwich Observations, 1862.
- This is the corrected result, U.S. Coast Survey Report, 1872, p. 234. The resulting value of this
arc found by Mr Schott in his investigation (v. supra) is 41 33 8 '4O9.
3 Determinations of the positions of Feaghmain and Haverfordwest. An Appendix to the account of
the principal triangulation of Great Britain and Ireland, by Capt. A. K. Clarke, p. 22. Note. The geodetic
longitudes here given have in all cases been corrected by the addition of o"'3O = o'-O2 to reduce them to the
meridian of the Greenwich Transit Circle.
4 Ibid., p. 23.
' This value is found by adding z 31 "-50= io s -io to the above longitude of Feaghmain. (See Report
of U.S. Coast Survey, 1867, p. 1 15).
* Reduced to the meridian of the Greenwich Transit Circle.
viii TELEGRAPHIC DETERMINATION, 1888-1902.
The following arc the collected results for the several determinations of longitude
given in Parts I. and II. of this volume.
PART 1.
Longitude of Paris.
, Longitude of Cassini's Meridian East of the Greenwich Transit Circle :
1888 determination . .. . . .- . . 9" 1 20 S '85 r s '018
1892 determination . ... . . 9 2079 '022
1902 determination 9 20 "932 "006
PART II.
Longitude of Montreal transit pier West of the Greenwich Transit Circle :-
1892 determination . 4 h 54"' 18 S 'G2: S -024
Longitude of Canso transit pier West of the Greenwich Transit Circle :
1892 determination . . . 4 1 ' 4 1 " 7 8 '27 s '033
Longitude of Waterville transit pier West of the Greenwich Transit Circle :
1892 determination . . v . - 40 m 41"-30 =h s '021
Longitude of Killorglin transit pier West of the Greenwich Transit Circle :
1898 determination . . . . .' . 39"' 9"'85 db s< 023
My thanks are due to the Secretary of the Post Office, who on all occasions readily
acceded to my request for the use of the telegraph-lines ; and to the officers of this
department for valuable advice and assistance rendered, which made these deter-
minations of longitude possible. Also to the Directors of the Commercial Cable
Company, who, for the determination of the longitude of Montreal, granted the use
of a cable at times which must have caused some inconvenience to the regular course
of their business; and to the officers of this Company, who. with the utmost cordiality,
gave effective help to the observers and to the undertaking generally.
W. H. M. CHRISTIE.
ROYAL OBSERVATORY, GREENWICH,
1905, DECEMBER.
TELEGRAPHIC DETERMINATION
'OF THE
DIFFERENCE OF LONGITUDE
BETWEEN
PARIS AND GREENWICH
IN THE YEAR 1888.
L INTRODUCTORY.
IN the year 1887 a request was made to the Astronomer Royal by the officers of
the French Geodetic Survey that the longitude Paris-Greenwich should be redetermined
with all the accuracy attainable by modern methods. This longitude was determined
telegraphically under the direction of M. Le Verrier and Sir George Airy in 1854,
both stars and signals being observed by the eye and ear method. The observers
were M. Faye, of the Paris Observatory, and Mr Dunkin, of the Greenwich
Observatory, who were interchanged once. The instruments used were the large
transit-circles of the two observatories. The result found for the difference of
longitude between the Greenwich transit-circle and the meridian of Cassini (Paris)
was 9 m 20 8 '51, the accordance of the twelve nights of observation being remarkably
good, and this result was consequently adopted, although it differed by about 1 s from
the previously-assumed longitude, 9 m 21 9 '57, determined by rocket signals in July,
1825. (Phil. Trans. 1826, Part II.)
But there has since been reason to doubt the correctness of this result. In 1872
the same longitude was found by Prof. J. E. Hilgard, of the U.S. Coast Survey, to be
9 m 20 8 '97 (U.S. Coast Survey : Report for 1872) ; and since then various indirect
determinations (such as the combination of the longitude Vienna-Greenwich with
Paris- Vienna) have indicated that the result of 1854 is too small. The following is a
list of all telegraphic determinations (direct and indirect) made previous to the
year 1888.
GREENWICH OBSERVATIONS, 1899. a
: A ":
2 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
Longitude Paris (Cassini's Meridian] Greenwich (Transit Circle).
I. Direct.
Paris-Greenwich
Result,
m s
9 20-51
Date.
1854 Me
Paris-Greenwich
9 20-97
1872 U.l
Reference.
Monthly Notices, R.A.S., vol. xv. p. 124
(reduced to Cassini's meridian).
U.S. Coast Survey, 1874, p. 180 (reduced to
Cassini's meridian).
Vienna-Greenwich 65 21-21
Paris- Vienna
Paris-Greenwich
Berlin-Greenwich
Paris-Berlin (F.)
56 O-22
9 20 '99
53 34'9 r
44 I3-99
Paris-Greenwich (F.) 9 20-92
Berlin-Greenwich 53 34^91
Paris-Berlin (G.) 44 13-86
Paris-Greenwich (G.) 9 21-05
Vienna-Berlin
Berlin-Greenwich
Paris- Vienna
ii 46-26
53 34'9'
56 O'Z2
Paris-Greenwich 9 20-95
Bonn-Greenwich
Paris-Bonn (F.)
28 23-31
19 2-26
Paris-Greenwich (F.) 9 21-05
Bonn-Greenwich 28 23-31
Paris-Bonn (G.) 19 2-23
Paris-Greenwich (G.) 9 21-08
Greenwich-Leiden 17 56-10
Paris-Leiden 8 35-21
II. Indirect.
1876 Assoc. Geodesique. Report on Longitude, by
Bruhns (1880).
1876 Assoc. Geodes. (1883). Eeport by Bakhuyzen.
1877 Comptes Rendus. 1878, Feb. 4.
1876 ut supra.
1877 Pub. Preuss. Geodiit. Institut. 1877, p. 147,
and Astr. Nnch., No. 2265, p. 131.
1876 Assoc. Geodes. (1883).
1876 Assoc. Geodes. (1883).
1873 ut supra.
1864 Assoc. Geodes. (1880).
1877 Assoc. Ge'odes. (1880.)
1 864 ut supra.
1877 Pub. Pr. Geod. Inst. (1877), and Astr. Nach.,
No. 2265, p. 131.
1880 Leiden Observations, vol. vii.
Assoc. Geodee. (1892).
Paris-Greenwich 9 20-89
INTRODUCTORY. 3
The determinations Paris-Berlin and Paris-Bonn in 1877 were made indepen-
dently by French and German observers, whose results are distinguished in the
above table by the letters (F) and (G).
It is thus apparent that a direct redetermination of this longitude was a matter
of great interest and importance. The Astronomer Koyal accordingly entered into
communication with the late General Perrier, then Director of the " Service
Geographique de 1'Armee Frangaise," and with Admiral Mouchez, the Director of the
Paris Observatory, as to the programme of observations and the date on which the
operations could be commenced. It was decided that the summer of 1888 should be
devoted to the work ; and at this point negotiations were interrupted by the sudden
and lamented death of General Perrier, on February 20, 1888. They were shortly
afterwards renewed by Col. Derrecagaix, General Perrier's successor. It was arranged
that M. Loewy (representing the Paris Observatory and the Bureau des Longitudes)
and Commandants Bassot and Defforges (representing the Service Gdographique) should
pay a visit to Greenwich and settle the definite programme in consultation with the
Astronomer Eoyal. This visit was paid on June 15, 1888, and following days.
M. Loewy reported that the Paris Observatory would not be able to take part in the
work, which would thus be shared by the French Service Geographique and the Eoyal
Observatory, Greenwich. It was decided that two observers should be appointed by
each of these ; and that the French observers should be Commt. Bassot (B) and
Commt. Defforges (D) ; and the English Mr Turner (H T) and Mr Lewis (L).
B and D were to use two French portable transit instruments by MM. Brunner,
such as they had already used for other longitudes ; and H T and L two of the
portable transits by Troughton and Simms in the possession of the Greenwich
Observatory. The observers were to be interchanged twice as follows :
1st Series : 3 full nights, or the equivalent in half nights.
D and L at Greenwich, B and H T at Paris.
2nd Series : 3 full nights, or equivalent.
B and H T at Greenwich, D and L at Paris.
3rd Series : 3 full nights, or equivalent.
B and H T at Greenwich, D and L at Paris.
4th Series : 3 full nights, or equivalent.
D and L at Greenwich, B and H T at Paris.
All four observers were to exchange signals automatically on their respective chrono-
graphs each night [in the order B and D, B and L, H T and L, and H T and D for the 1st
and 4th series, and the order D and B, D and H T, L and H T, L and B for the 2nd
4 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
and 3rd series], so as to give 4 determinations of personal equation, two and two, and to
eliminate small differences in the two chronographs at each station. Later in each complete
evening the exchanges B D and HT L only were to be repeated, so that the mean epoch
of these pairs of exchanges should be nearly the same as that of the time-determinations.
The Paris station was at the Observatoire du Depot de la Guerre, Montsouris, where one
French and one English instrument were mounted on two piers 20 feet apart, the
English: instrument being to the east ; and the Greenwich station was in the front
court of the Royal Observatory, where two transit-huts were erected and two piers
built, that for the French instrument being 41 feet west of the transit-circle, and that
for the English instrument being in the meridian of Bradley's transit, 19 feet west
of the transit-circle. The four chronographs were kindly lent by the French Service
Ge"ographique, and had been in use for other longitude operations. A spare wire was
courteously placed at the disposal of the Astronomer Royal each night from eight to
twelve by the Submarine Telegraph Company ; and the French and English Post
Offices provided the services of clerks at Montsouris and Greenwich during these hours,
and the use of wires from Paris to Calais and from Greenwich to London, so as to give
direct communication between Montsouris and Greenwich. Operations were commenced
on September 21, 1888, when Commt. Defforges arrived at Greenwich to co-operate
in preparing the galvanic connections and to mount his instrument. Mr Turner left
for Paris on September 23. The following is an account of the course of the work, P
denoting Paris and G Greenwich :
September 25. Cloudy P and G : exchange of practice signals.
September 26. Cloudy P and G.
September 27. Partly clear : instruments adjusted to meridian.
September 28. Cloudy P and G.
September 29. Cloudy P and G.
September 30. Partly clear : one exchange : half night.
October 1. Partly clear: one exchange : half night.
October 2. Clear G : cloudy P.
October 3. Partly clear : one exchange : half night.
October 4. Cloudy P and G.
October 5. Quite clear P and G : two complete exchanges : full night
(End of 1st Series.)
October 6. H T returned to Greenwich. Clear G : cloudy P.
October 7. D and L went to Paris. Clear G and P.
October 8. B arrived at Greenwich. Clear G : raining P.
October 9. Clear G : raining P.
October 1.0. Cloudy P. and G.
INTRODUCTORY. 5
October 11. Quite clear P and G: two exchanges: full night.
October 12. Cloudy P and G.
October 13. Clear P and G : two exchanges : full night.
October 14. Clear P and G : two exchanges : full night.
October 15. Clear P and G : trouble with batteries G : one exchange : half night.
(End of 2nd Series.)
October 16. Cloudy P and G.
October 17. Clear P and G : two exchanges : full night.
October 18. Cloudy G: Clear P.
October 19. Clear P and G : two exchanges : full night.
October 20. Clear G : only partly P : half night.
October 21. Clear P and G : two exchanges : full night.
(End of 3rd Series.)
October 22. B and H T went to Paris.
October 23. D and L went to Greenwich : clear P : only partly G : half night.
October 24. Cloudy P and G.
October 25. Cloudy P and G.
October 26. Cloudy P and G.
October 27. Clear P and G : two exchanges : full night.
October 28. Raining G : partly clear P.
October 29. Raining G : partly clear P.
October 30. Partly clear : one exchange : half night.
November 1. Cloudy P and G.
November 2. Cloudy P and G.
November 3. Cloudy P and G.
November 4. Cloudy P and G.
November 5. Cloudy P and G.
November 6. Cloudy P : clear G.
November 7. Cloudy P and G.
November 8. Cloudy P and G.
November 9. Partly clear : one exchange : half night.
November 10. Cloudy P and G.
November 11. Cloudy P and G.
November 12. Cloudy G : clear P.
November 13. Clear P and G : two exchanges : full night.
(End of 4th Series.)
6 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
It was decided that the English observations and the French should be worked
up and published separately ; and the following account is confined to the English
observations, except in so far as they are brought into relation with the French by the
chronographic exchanges, or by the adoption of corrections to Ephemerides, as
explained on p. 63.
II. OBSERVING STATIONS.
Greenwich. The hut under which the instrument was mounted is shown in plan
and in elevation in Plate I. The chronograph table was placed in the north-west
corner, and illuminated by an oil lamp, and a clock (Arnold I.) in the north-east
corner. An electric light, from a primary battery near the clock, was used for
illumination of the field of the instrument, to avoid heating effects. The pier was built
of brick, on a concrete foundation (4 feet cube) 2 feet below the ground level, and
carefully isolated from the floor of the hut ; on the top of the pier a capping stone was
fixed, to which the iron stand for the instrument was bolted by means of lewises
cemented into the stone. A wooden framework surrounded the pier at a distance of
about an inch, to guard it from accidental jars. The centre of the pier is 19 ft. in.
west, and 70 ft. north of the Transit-Circle, in the meridian of Bradley's transit.
Paris. Diagrammatic Plans of the room in the " Observatoire du Dep6t de la
Guerre " used for the operations are given in Plate II. The French instrument was
mounted in a room adjoining, on a pier 6 metres to the west of the English pier.
As the result of a careful triangulation, Commandant Defforges states that the
English instrument was O s '268 west of Cassini's meridian.
III. INSTRUMENTS.
The instruments were those designated B and C of the series of five transits,
precisely similar in all respects, constructed for the Transit of Venus Expeditions (1874)
by Messrs Troughton and Simms. The following is a description of one of these
instruments, the particulars being taken from the volume "Transit of Venus, 1874,
British Observations," page 9, except where changes have been made subsequently in
the instruments.
The object glass is of 3 inches clear aperture and 36^- inches focal length. The axis,
consisting of central cube and cones, was cast in one piece. Its length from shoulder
to shoulder (that is, exclusive of the pivots) is 18 inches; the pivots are l inches
long and 1^ inches diameter. The central cube is of 6 inches side ; the cones are
INSTRUMENTS. 7
5|- inches in diameter at the cube and 2| inches at the shoulder. The two tubes,
which with the cube form the telescope, are 4^ inches in diameter at their attachment
(by flanges) with the cube. When the dew cap is on, the instrument weighs 44 Ibs.,
and is perfectly balanced on its pivots. The system of webs, consisting originally of
5 vertical webs, at intervals of about 3^', to which were afterwards added six between the
second and fourth for more convenient use in observing chronographic transits, and two
horizontal webs about 5' apart, is mounted on the plate driven by the micrometer screw,
so that the whole system moves when the screw is turned. The head of the micrometer
screw is divided on silver to 100 parts, and is provided with a movable brass cover to
prevent its being accidentally turned when not actually in use, as when observing time-
stars. The thread of the screw is kept bearing in one direction by a spiral spring within
the box, as with all Messrs Troughton and Simms' micrometers. There is no perceptible
" loss of time" in any one of them. The eye-piece is moved rapidly from wire to wire
by a quick screw, the milled head of which is opposite to the micrometer-screw head.
The illumination of the field is effected in the usual way by the light from a small
electric lamp passing through one of the pivots on to a gilt reflector, which can be
inclined more or less to regulate the illumination, by a rod leading down to the eye-
piece. The illuminating lamp is on the same side as the micrometer head. There is
a polar-distance setting-circle 4|- inches diameter on each side of the tube near the
eye end.
For the transit of Venus expeditions these instruments were mounted between
two brick piers, but subsequently two heavy cast-iron stands were made for them by
Messrs Troughton and Simms, capable of being firmly connected by lewises with the
stone surmounting the single brick pier mentioned above. The instruments were
mounted in this manner during longitude operations conducted at the Cape of Good
Hope under the supervision of Dr Gill. In returning them to Greenwich for use on
the present occasion Dr Gill remarked that the pivots were considerably worn, and
.forwarded a determination of- their errors which it had been necessary to make. It was
considered advisable, however, not to use the instruments in this state, and the pivots
were carefully reground by Messrs Troughton and Simms. Observations of their new
form, which will be quoted later, showed that the cylindrical shape was satisfactorily
restored. The reflectors were at the same time regilded, and diagonal eye-pieces
(powers not quite the same for the two instruments, being 43 for B, and 53 for C)
were supplied, which were used for all the observations of stars, Bohnenberger eye-
pieces (powers 53 for B, and 48 for C) being used for the nadir observations. The
hanging levels are divided to 0'08 in., the mean value of a division being about 1".
The divisions were numbered from to 100, the readings increasing towards the cross-
level. The glass bubbles themselves were protected by covers of plate glass.
8 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
The similarity of the instruments was tested on 1890 April 21 by Mr Turner
and Mr Lewis. They were mounted, side by side in the Front Court of the Royal
Observatory, and a complete time determination made with each of them by each
observer, the same stars being observed simultaneously by the two observers with the
different instruments, which were each reversed twice. The personal equation of the
observers and an analogous equation for the instruments were thus both determined.
The results were as follows :
Excess of Excess of
Time by B, observer H T., Time by C, observer H T.,
over Time by C, observer L. over Time by B, observer L.
54 Leo Minoris ' 0-02
47 Ursfe Majoris 0-12
60 Leonis 0-13
X Leonis o'o6
s 2' 3 Leonis o'lz
v Ursee Majoris 0-27
8 Crateris 0-23
o- Leonis 0-38
T Leonis 0-23
ft Leonis o- 1 8
/? Virginia 0*13
95 Leonis o - i6
Groombridge 1841 0-07
IT Virginis 0^14
o Virginis 0-17
10 Virginis 0^3 6
4 Comre 0-19
W. B. XII. 107 - 0-38
Mean o'2O 0-17 .
The difference of personal equation between the observers is thus O s> 185 ; and
between the instruments only O s :015, or sensibly zero. During the early days of
the longitude operations, when clouds prevented any stellar work being done, it
was found from nadir observations that the object glasses were both loose in their
cells. It is not quite clear how this occurred, for the instruments had both been
previously used in practice for some weeks. The journey to Paris might have shaken
loose the object glass of Transit B, but Transit C was undisturbed on its pier through-
out. The defect in both instruments was discovered on nearly the same day, and
fortunately in time to rectify it before real work commenced. In the case of Transit
B, Mr Turner could only pack cotton wool tightly between the object glass and the
outer rim of its cell, pressing the wool in with a flattened quill, as the mischief was
discovered late on Sunday afternoon, September 30, and the instrument was wanted
for work immediately. But this packing was found so efficient that it was not
disturbed. The object glass of Transit C was made firm in its cell by Messrs
Troughton and Simms.
VALUES OP ONE REVOLUTION OF MICROMETER SCREWS.
IV. INSTRUMENTAL CONSTANTS.
(1) The value of one revolution of the micrometer screws was determined by two
methods.
(a) Transits of Circumpolar Stars. Some special observations were made for
the purpose; but besides these every observation of a circumpolar star during the
actual longitude work can be used for this determination. As will be explained in the
account of azimuth error, a circumpolar star is bisected 10 or 20 times with one of
the vertical wires by means of the micrometer ; the instant of bisection being
registered on the chronograph. The mean of each group of five readings for
bisection is taken separately in the course of the work, as also the mean of the
corresponding times. The ratio of the differences of these means gives the value of
one revolution. The probable errors of the bisections were determined and from them
and the number of observations the appended probable errors were calculated to
give weights for combining the determinations from the various stars used for
azimuth error.
Star.
Transit B. (Paris).
Transit 0. (Greenwich).
Value of i rev . Prob. error.
Value of i^". p,. i,. error.
Polaris
//
+ -nSri
, "t.
Bradley 1672 S.P
c r-Scs
55 95 Z
i "3
Groombridge 31:48 .
->-> > 3
c6'378
103
55 739
\ TJrsse Minoris
3*5
5 477
2 37
Bradley 3147...
56*1 20
5^ 343
-ill
2 Ursse Minoris
c6*3Ai
1Z 9
i 68
5 IO 5
,-A-ifii
105
.__/'
>" j<H
070
Weighted Mean...
56-063
o"-o 5 5
56-063
o"-o38
(b) By comparison of the observed wire-intervals in time for quickly-moving
stars with intervals in terms of the micrometer screw obtained from the nadir
observation, by bringing each wire separately into coincidence with its image.
GREENWICH OBSERVATIONS, 1899. ^
10 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
The results were as follows :
Transit B. Transit C.
Wire interval.
Value i rev ' Weight.
Value i rev - Weight.
I. IX.
56-115
7
56-127
7
II. VIII.
56-070
6
56-192
6
III. VII.
56-325
4
56-357
4
IV. VI.
56-400
3
55-932
3
Weighted IVIean
c6"ioo
56-162
j *y^
From a consideration of the results by the two methods, the value 56"'10 or 3 S> 740
was adopted for l rev- of both screws.
(2) For determination of the Equatorial intervals of the vertical wires, the
transits of 100 equatorial stars were reduced for Transit C, and 20 stars for Transit B.
But it was afterwards found that nadir observations made as above were much more
accurate, and it was not considered necessary to reduce any more star transits for
Transit B ; those already reduced were, however, used above to determine the
value of l reVl of the screw.
The following results were obtained by nadir observations for the distances of
each wire from the mean, expressed in revolutions of the micrometer screw. In
the column, " Position of Instrument," W. denotes micrometer head West, and E.,
micrometer head East.
The nine vertical wires are denoted by the Roman numerals I., II., III., etc., the
order in which a star transits when the instrument is in the position micrometer
head West.
Wire Intervals. Transit B.
Date, 1 888,
and Position of
Instrument.
Nov. 5 W
5 E
9 W
9 E
10 E
12 W
12 E
II.
III.
3752
751
755
752
754
754
748
r
-2-983
r
-2-247
984
247
983
'246
983
246
984
247
986
248
981
250
Wires.
IV.
V.
r
r
-1-475
+0-010
471
oio
'473
009
472
007
'474
ooi
472
006
472
003
VII.
VIII.
IX.
Means 3-752 2-983 2-247
VI.
1-520
524
524
524
524
523
523
+0-007 +1-523 +2-213 +3' OI +3703
r
r
r
+ 2'2I3
+ 3-008
+ 3-703
213
'014
695
2I 3
006
704
2I 3
oio
701
213
oil
709
212
01 I
706
212
oio
703
VALUES OF LEVEL SCALES.
Wire Intervals. Transit C.
11
Date and
Wires.
Position of
Instrument.
I.
II.
III.
IV.
V.
VI.
VII.
VIII.
IX.
1888.
r
r
r
r
r
r
r
r
r
Nov. 1 6 W
-3736
2-990
-2-233
-I- 4 95
+ 0-006
+ 1 '49 6
+ 2-225
+ 2-978
+ 3747
,, 16 E
737
987
227
'494
+ -009
491
2I 9
976
75'
1889.
Feb. 21 W
737
990
240
49 I
+ -008
492
223
980
751
21 W
739
992
-233
498
+ '003
498
231
986
'747
21 E
740
3-OOO
228
491
+ 'OOI
494
2I 9
985
756
,. 21 E
736
2-990
236
'493
ooo
"493
224
986
'749
21 E
724
'994
238
498
-005
488
226
980
768
21 E
742
986
'222
504
+ '4
484
"230
992
748
21 W
746
976
226
512
-ooi
486
224
986
77 o
21 W
738
986
2 5 6
506
+ "OIO
482
'222
998
'774
Means 3738 2-989 2-235 1*498 +0-004 +i'49 +2-224 +2-985 +3-756
Subtracting the value for the centre wire and converting the revolutions into
time (l rev ' = 3 S 740), and in the case of Transit C combining the results with those
from the transits of 100 equatorial stars (with which they sensibly agree), we get the
following adopted values for distances from the centre wire.
Wire(W.) Transit B. Transit C.
I.
14-058
14-008
II.
11-182
11-209
III.
- 8-430
8-400
IV.
- 5-535
- 5-613
V.
.. .
VI.
+ 5-670
+ 5-547
VII.
+ 8-251
+ 8-316
VIII.
+ 11-231
+ H-I53
IX.
+ 13-823
+ 14-027
(3) Tlie Value of l div - of the level scales was determined in 1888 September before
the longitude operations, by attaching the levels firmly to the telescope tube of the
Greenwich Altazimuth, and bringing the bubble by means of the slow motion in zenith
distance, alternately to the two ends of the scale. Two of the microscopes of the vertical
circle were read at each level setting, each microscope being read two or three times, and
the mean set down in the observing book. One microscope was read by the observer
who also read the level, and the other by an independent observer. The individual
results are given below : the initials H T and L denote the observers Mr Turner and
Mr Lewis ; and the letters B and D are the letters attached to the particular micro-
scopes of the vertical circle.
12 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
Level for Transit B.
Microscopes. Ler el (H T).
B.
(L-)
Difference.
D.
(HT.)
Difference.
Ends of Bubble.
Mean.
' Difference.
r
r
r
r
d d
d
d
6-228
5-978
0-5 50-8
25-2
roo2
1-041
37' 1
7-230
7-019
36-7 87-8
62-3
I-III
1-087
35" 8
6-119
5-932
0-9 52-1
26-5
1-142
I-I26
39'
7-261
7-058
40-0 90-9
65-5
J-IOO
1-123
35-2
6-161
5-935
47 55'9
30-3
. O
1-126
1-013
32-8
7-187
6-948
37-7 88-5
6 3 -I
O
1-088
I'lII
33-8
6-099
5-837
3-8 54'8
29-3
7-081
0-982
6-863
I-O26
35-2 86-0
60-6
31-3
1-009
1-009
30-9
6-072
5-854
4'3 55'
29-7
0-977
1-013
3''3
7-049
. 6-867
357 86-2
61-0
0-956 '
0-979
29-0
6-093
5-888
67 57-2
32-0
( 1-0528
1-0493
33-62
Means in Arc <J
( 4"'39 39"'9 I
40"- 1 5 .- i 41 "' = i"'i95
(H T). (L).
(L).
S'9'7
0-953
5-732
0-863
3'4 53-6
28-5
26-1
6-870
6-595
29-7 79-5
54-6
0-948
0-908
31-0
5-922
5-687
- 1-2 48-4
23-6
o
1-106
1-127
38-2
7-028
6-814
36-9 86-7
6l-8
1-098
I-OO2
33-3
5-930
5-812
3'5 53'4
28-5
I'OOI
ron
3 I- 5
6-931
6-823
35'3 847
6o - o
1-125
1-138
37-0
5-806
5-685
2-1 48-1
23-0
1-320
1-272
44'3
7-126
1-188
6-957
1-180
42-4 92-1
67-3
38-6
5-938
5777
3-8 53-5
28-7
1-106
1-099
33-8
7-044
6-876
37-7 87-2
62-5
i-i37
1-104
35'7
5-907
5-772
1-9 51-6
26-8
Means in Arc
1-0982
1-0704
34-95
'39
div.
VALUES OF LEVEL SCALES.
13
Level for Transit C.
Microscopes. Level (L).
B.
D.
(H T).
Difference.
(L).
Difference.
End of Bubble. Mean.
Difference.
r
r
r
r
d d d
d
3-222
3-143
38-1 90-8
64.5
I-I28
1-104
3 2 '3
4-35
4-247
5'9 58-5
32-2
1-024
0-932
J'5
3-326
3-315
37-5 89-8
637
I-II7
1-054
33-8
4-443
4-369
3-6 56-1
29-9
1-103
1-098
31-2
3-340
3-271
34'9 87-2
61-1
1-290
1-192
35'
4-630
4-463
o-o 52-1
26-1
I-330
1-214
36-1
3-300
3-249
36-1 88-3
62-2
1-083
1-065
30-1
4-383
4-314
5-8 58-3
32-1
1-073
I'll?
32-5
3-310
3-197
38-2 91-0
64-6
1-088
1-125
33'3
4-398
4-322
5'i 57'4
31-3
0-996
1-027
29-4
3-402
3-295
34-6 86-7
60-7
( 1-1232
1-0528
32-52
Means in Arc -J
(L).
(HT).
(HT).
4-659
4-530
0-2 52-7
26-5
1-155
1-237
33-8
3-504
3-293
34-2 86-3
60-3
1-096
I-I73
32-1
4-600
4-466
2-1 54-3
28-2
I-34I
1-377
37-8
3-259
3-089
39-7 9 2- 3
66-0
1-279
1-305
357
4-538
4-394
4-2 56-3
30-3
1-207
I-2I8
357
3-33I
3-176
39-7 92-2
66-0
1-195
1-232
36-5
4-526
4-408
3'3 55'7
29-5
1-175
1-240
35-2
3-351
3-168
387 9'7
64-7
1-058
1-144
31-7
4-409
4-312
6-8 59-1
33'
0-993
1-042
30-3
3-416
3-270
37-o 89-5
6 3'3
I-I93
1-217
3 4' i
4-609
4-487
3'i 55-3
29-2
( 1-1692 1-2185
34-29
Means in Arc <
( 44"'96 46"-24
45"-6o
14 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS- GREENWICH, MADE IN 1888.
After the longitude operations it was considered advisable to re-examine the
levels by an independent method, with a "level prover " kindly lent by Messrs
Troughton and Simms. It was then discovered that the scales were by no means
uniform, and a more elaborate calibration was obviously necessary, which was carried
out as follows :
The value of l div> of the level prover was carefully determined by attaching it
firmly to the Transit-Circle telescope, and placing on it a level bubble. The telescope
was clamped in different positions and the screw of the level prover turned until the
level bubble was brought to exactly the same position. The level prover and the six
microscopes of the circle were then read. The extreme readings of the level prover differed
approximately by 25 rev - The resulting value for l rev - of the prover as determined.
by H T was 2 0-03
by L I 59-94
Adopted value 2 o-oo
Each revolution being divided into 120 parts, the value of l lliv - is thus accurately 1".
The level prover was then mounted on a slate slab in the Eecord Room of the Royal
Observatory, where the air is not subject to disturbance and one of the transit levels was
placed on it. The level prover being set to a convenient reading, the ends of the bubble
were read ; the level prover was then turned through 10 div -, corresponding to 10", and
the ends again read. The difference of the two readings was not generally the same
for the two ends, and in the first instance the results for the two ends were treated
separately. The quotient of 10 by the corresponding difference of readings in the two
positions was considered to be, in each case, the value in seconds of arc of" l div - of the
level for a position of that end midway between the two. The screw of the level prover
being then turned through another 10 div -, the values of l div - were obtained for the two ends
at places approximately 10 div - distant from the first : then at places 20 div - distant from
the first and so on until one end ran off the scale. Another series was then taken,
still in steps of 10 div -, but starting .with a slightly different reading of the level prover,
so that parts of the scale were observed intermediate between those tested in the first
series. Finally, all the measures for one end were arranged in order of the midway-
readings ; the results smoothed by taking means of every consecutive three, and
plotted on paper with the midway-reading as abscissa, and the value of l dlv - as ordinate.
But the two resulting curves were found on comparison to be practically the same ;
and it was thus apparent that the two ends were not independent ; in other words,
that the value of l div - at either end was not determined by the shape of the tube near
that end, but chiefly by the general shape of the portion of the tube filled by the
bubble. The separate results were therefore conbined, the mean of the two ends being
VALUES OF LEVEL SCALES.
15
taken in each case, and the quotient of 10 by the difference of the two means was
considered to be the value in seconds of arc of l div- of the level for the midway-
position of the middle of the bubble, and a curve plotted for the middle of the bubble
just as for the two ends.
There remained the question how far a change of temperature would modify
this curve. Mr Simrns kindly made some measurements of the scale value on the
same general plan at temperatures from 65 to 73, considerably higher than that of
the Record Room, and his results were found to agree well with those obtained at the
Observatory. It would thus appear that although the bubble changes 'in length with
temperature, the general shape of the portion of the tube it occupies remains so far the
same that for a moderate range of temperatures the results tabulated for the middle
of the bubble are not sensibly affected.
All the observations for each bubble were therefore taken together, being arranged
in order of the mean reading for the middle of the bubble. The results are given in
the following tables. In column I. is the mean reading for middle of bubble, and in
column III. the corresponding value of l div- In columns II. and IV. the means of
every consecutive three constituents of columns I. and III. are taken to smooth down
accidental irregularities and allow a mean curve to be drawn.
Transit B.
Transit C.
Position
of centre
of bubble.
Means y , Means
of every , ,. of every
three/ three
Position
of centre
of bubble.
Means
of every
three.
Value
of i div.
Means
of every
three.
d
d a a
d
d
a
H
6l'2
30
6o'5
1-19
60-6
6o'6
28
'24
59-0
59'3
i'35
I'26
60-0
59'3
14
14
58-4
58-0
1-25
i'37
57-3
57'4
oo
i i
5<5' 4
567
1-51
i -44
55'8
56-3
19
04
55'2
55'5
1-53
55-8
55'5
94
'IO
55-0
54'9
1-52
1-52
55-0
54-6
17
04
54'4
537
1-47
i '47
53'5
oo
08
52-0
52-6
i '43
i '45
52-5
52-3
06
06
51-6
i '47
i'37
5 I- 3
5'7
I I
06
51-4
50-9
1-23
i'39
51-2
50-8
01
04
49 -8
49-8
1-47
,-36
50-0
50-0
00
.10
48*3
48-6
i'39
1-36
48-8
48-9
21
10
47'8
47-3
1-22
1-35
48-0
47-8
09
'II
46-4
467
I-I4
1-13
46-5
46-8
03
09
45'9
45'5
I'O4
1-05
46-0
45 "9
'14
20
44'3
44'4
0-98
I'OI
45''
447
'43
28
43'
43-2
I'OO
0-97
42-9-
43'5
25
31
42-2
41-8
0-92
i-oo
42-6
42-4
'35
27
40-4
40-3
I "Og
1-03
41-8
42-0 I'22
15
38-3
38-8
I '09
I-I I
417
4i'4 0-89
04
37-8
37'8
I'I4
1-09
4O'6
40*2 roo
oo
37'2
37' 1
1-04
1-05
38-3
387 i'ii 0-99
36-2
36'i
I -06
37-2
36^6 o'86 0-96
35'
34'5
I-I9
I'I2
34'3
35-2 o'go 0-83
32'4
33'i
I'22
1-22
34' 2
33'5 73 79
32-0
3 1 '6
1-25
1-27
31-9
32-4 075 074
30-5
i-35
3 1 ' 1
73
16 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS -GREENWICH, MADE IN 1888.
From columns II. and IV. points were then laid down on cross ruled paper, with
the constituents of column II., as ordinates, and those of column IV., as abscissae, and
through these points a smooth curve was drawn by hand. The value of l dlv- , for any
position of the centre of the bubble, could then be read from this smooth curve, and by
adding the values of successive divisions, the reading in arc corresponding to any
given reading of the centre of the bubble can be found. The selection of the zero
point on the scale is immaterial, as it is eliminated by the practice of reversing the
level. For convenience it was chosen near one end of the portion of the scale in use.
In the following tables column I. gives the readings of the centre of the bubble,
column II. the value of l div - at this point taken from the smoothed curves, column III.
the value of the portion of the scale between this point and the adopted zero, and in
the fourth the error of the scale on the assumption of a uniform scale value, viz.,
I*'- = i"-07 for Transit B, and l div - = l"'22 for Transit C.
Transit B.
Transit C.
Centre Value
Value of
Error
Value
Value of
Error
of of
whole
of
of
whole
of
Bubble. i div.
portion.
Division.
i div.
portion.
Division.
34
O-OO
o-oo
"
O'OO
O'OO
35 '8i
0-81
0-26
I I
I'll
o-li
36 0-85
1-66
0-48
09
2-2O
0-24
37 Q'95
2-6 1
0-60
07
3-27
- 0'39
38 0-97
3-58
0-70
08
4'35
-'53
39 '99
4'57
078
09
5'44
- 0-66
40 -oo
5'57
0-85
07
6-5,
0-81
41 -02
6-59
0-90
'3
7'54
-oo
42 -05
7-64
0-92
oo
8-54
'22
43 -28
8-92
- 0-71
0-99
9'53 .
- "45
44 -31
10-23
- '47
0-99
10-52
- -68
45 -29
11-52
0-25
I'OI
U'53
- -89
46 -24
12-76
0-08
1-04
12-57
- 2-07
47 'I*
13-88
0-03
I'll
13-68
2-18
48 -io
14-98
O'OO
i'34
15-02
2 'O6
49 -io
1 6-08
+ 0-03
i-35
16-37
- '93
50 -09
17-17
+ 0-05
1-36
1773
- 79
51 -07
18-24
+ 0-05
i'37
19-10
- -64
52 -06
19-30
+ '4
i-39
20-49
- '47'
53 '6
20-36
+ 0-03
i '43
21-92'
- -26
54 -o6
21-42
+ O-O2
1-48
23-40
'OO
55 ' 6
22-48
+ O'OI
1-51
24-91
0-71
56 -07
23-55
+ o-oi
1-51
26-42
- 0-42
57 '08
24-63
+ O'O2
1-48
27-90
0-16
58 -io
2573
+ '5
1-40
29-30
+ O-02
(4) Inequality of Pivots.
The mean level indications, in reversed positions, of the instruments on each night
of observation were compared, and the results are given below, lii the first column is
the date, in the second the number (m) of observations of level, by means of the
INSTRUMENTAL CONSTANTS.
17
hanging level, micrometer head W, in the third the number (n) of observations,
micrometer head E, in the fourth the weight : - to be assigned to the result in
the fifth column, which is one-fourth the difference between concluded level indications,
W and E respectively, and is the correction applicable, positively for the position
E, and negatively for W, to the observed level indications in these positions, due
to inequality of pivots.
Trawstf .B.
Transit C.
2m
W E
2mn.
W-E
m.
A*
ro-f-w
4
fit.
m-\-n
4
September
30
5
6
5
0-050
3
4
3
+ 0-045.
October
I
4
4
4
0-023
4
6
5
O-022
2
2
2
2
O*O2 C
w *-* ^.
3
4
5
4
0-025
4
3
3
O-I72
4
2
2
2
+ O - OI2
i
i
i
O'OIO
5
6
7
6
+ O-05O
6
5
5
0-060
8
2
i
2
0-2C8
9
i
i
i
o - o6o
2
3
2
J
- 0-175
10
i
i
i
0*16 c
ii
8
6
7
+ 0-028
7
7
7
- 0-075;
12
i
2
i
0*01 8
13
7
II .
9
0-065
7
8
7
- 0-370
H
10
9
9
0-055
5
7
6
0-105
15
10
7
8
0-082
2
3
2
4- 0-032
16
I
i
i
0-090
...
. ..
17
8
9
8
0-040
7
g
7
0-138
18
6
2
3
+ 0-050
. ..
...
I 9
1 1
9
10
0-040
7
4
5
0-158
20
5
8
6
0-090
3
6
4
o-iio
21
9
ii
10
+ 0-045
5
6
5
- 0-155
23
4
5
4
+ 0-025
8
6
7
0-105
24
2
2
2
+ 0-068
25
2
2
O-I2C
26
C
7
6
1 . }
-j- O'O22
27
J
6
/
6
6
O'OOS
9
7
8
- 0-178
28
i
3
2
O-OI5
...
2 9
...
...
2
2
2
0-018
30
5
2
3
-f- 0-042
7
7
7
0-109
31
i
i
i
+ 0-02?
November
6
c
6
c
O'2OO
9
4
3
3
+ O-008
J
5
8
J
6
- 0-053
10
2
3
2
+ 0-178
'3
7
8
7
0-052
12
13
12
0-162
Sums and ]
Cleans
'33
136
i7
0-017
116
124
II 4
0-128
GREENWICH OBSERVATIONS, 1899.
18 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
The apparent level error due to inequality of pivots is thus insensible for Transit
B, and very small for Transit C, and since the method of making obseuvations
approximately equal in number in the two positions of the instrument on each night,
eliminates any such error from the mean result, it has not been considered necessary
to apply any correction for inequality of pivots.
(5) Form of Pivots.
The pivots of Transits B and C were reported by Dr Gill on the return of the
instruments to Greenwich to be very faulty, and were accordingly re-ground before
the present operations. The result was satisfactory, as the following experiments
shewed them to be sensibly cylindrical and equal.
I. Special observations were made with the hanging levels of both instruments,
with the instrument set to every available 10 of Z.D. [The hanging levels foul the
telescope tube from Z.D. + 23 to 23.] No sensible systematic difference was
found between the readings in different positions.
II. During the actual longitude operations, the levels were read several times in
each evening when the instruments were pointing to clock stars from Z.D. 70 to 10,
and also with polar stars or at arbitrary northern zenith distances. The mean of all
such " equatorial " levels was compared with the mean of the " polar " levels on each
night, and for each position of each instrument. If the pivots were defective, such a
comparison could scarcely fail to elicit some evidence of the fact, but it will be seen
from the following figures that the mean results for " Pole Equator " are very small,
and must indeed be assumed to be accidental, for if they represented real quantities
the results IPE and IPW should be approximately equal and of opposite sign. The
2 mn
m+n
m and n are the numbers of observations, the difference of whose means is taken.
weights, in the following table, are calculated from the usual formula ~T , where
FORM OF PIVOTS ; CLOCKS.
19
" Polar "" Equatorial " levels.
Transit B. Transit C.
Date.
W
E
W
E
Wt.
P E. Wt.
P E.
Wt.
P-E.
Wt.
P-E.
Sept. 30
2
- 0-23 3
0-05
...
H
i
- 0'4S
Oct. i
...
2
+ O'OI
.. .
...
2
0-58
Oct. 2
I
+ 0-59
...
...
...
...
Oct. 3
2
O'lO 2
0-09
I
+ 0-34
I
-0-54
Oct. 5
2
0-08 3
0-05
2
-0-52
2
+ 0-07
Oct. 9
...
I
+ o-oi
Oct. 1 1
3
0-28 2
+ '39
3
0-80
3
-0-32
Oct. 1 3
2
- '27 3
+ o-io
3
-0-25
4
+ 0-14
Oct. 14
3
+ 0-62 3
+ 0'47
3
0-58
3
0-16
Oct. 1 5
4
+ 0-07 2
+ 0-14
i
- i'74
i
0'22
Oct. 17
3
+ 0-17 3
+ 0-24
3
- '44
4
O'22
Oct. 19
4
+ 0-83 3
+ 0-16
3
+ O'2O
2
+ '33
Oct. 20
2
- '43 2
+ o - 6o i
- o-44 3
0-03
Oct. 2 1
3
-0-17 4
O'OO 2
o-ii 3
O'O2
Oct. 23
2
0-48
2
-0-23
...
i
O'O4
Oct. 24
I
+ 0-20
. . .
. < .
...
Oct. 25
I
0-16
I
0-19
...
Oct. 26
2
0-28
3
0-09
...
...
Oct. 27
3
+ O'22
3
+ o-ii
3
-0-31 2
- 0-36
Oct. 28
...
i
+ O'OI
... ...
...
Oct. 30
3
+ 0-13
i
0-06
2
0-78 2
0-16
Nov. 6
2
-0-35 2
0-05
Nov. 9
2
+ 0'2 4
2
+ 0-29
2
- 0-58 3
0-48
Nov. 10
I
+ 0-23
I
0-07
...
...
Nov. 12
3
+ 0-26
... ...
Nov. 13
3
+ 0-14
4
0-05
3
-0-29 5
0-24
Means
+ 0-086
+ 0-090
-0-413
0-164
V. CLOCKS.
The clock used at Greenwich was the Sidereal Standard operating on the
chronograph through a relay. The Sidereal Standard is fully described in the Intro-
duction to the Greenwich Observations. The currents obtained from it at every
alternate second are used to actuate a relay, from which three independent circuits are
derived. One of these is appropriated to the seconds' magnet of the Transit-Circle
Chronograph : and another was used to work the relay in the longitude hut which
20 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
gave the actual clock-register used in the longitude operations. The interposition of
this subsidiary relay was necessary in order to convert the make-circuit action of the
Sidereal Standard into a break-circuit action, to which the French chronographs were
adapted. '
The clock used at Paris was Breguet No. 2, which was placed in the room where
the French instrument was mounted, and was subject to large variations of external
temperature. The evening rate of the clock, thus generally differed from the mean
rate, as will appear subsequently.
In both cases the clock circuit was interrupted once every two seconds.
VI. CHRONOGRAPHS, &c.
The chronographs and general electrical arrangements for transmission of signals
were kindly supplied by the French observers, and were such as had been used by
them in longitude operations in France and Algeria for some time past. A full
description of the apparatus, with various plates and illustrations, will be found in the
" Memorial du De"pot General de la Guerre, Tome XL : Determination des longitudes,
latitudes, et azimuts terrestres en Algerie." Section A. p. 20. The following
description is reproduced here for convenience.
Electrical Apparatus for Registering Observations and Signals.
This apparatus is mounted on a portable board, on which the terminals are plainly
marked, and which can be set up in a few minutes at any station as soon as the
external connections are made.
A diagrammatic view of the table is given in the accompanying plate III.
Besides the current which registers the clock beats, three others are used, which
register in turn by the same electro-magnet, star transits, signals sent, and signals
received according as the arm turning about C is placed to point to " Star Transits,"
" Sending," or " Receiving." In the lower face of this arm are six spring-contacts,
of which the first only is in connection with the pivot C ; the next three being
connected, and also the next two, but the various groups are carefully insulated
from each other. These contacts press, in the different positions of the arm, on the
buttons 1,2, 3, 4, 5, a, ft, j, S, 6, (f>, e, X, p., T, and x> the connections between which
are indicated by hard lines.
CHRONOGRAPHS, &c. 21
The three currents above mentioned all follow the same course when in action,
and are divided in A or X, according to circumstances, thence following different
circuits, and finally meeting again. A rheostat is placed in one of these circuits,
and in the other a galvanometer and a Siemens' polarized relay. By adjusting the
resistance of the rheostat, we can always obtain the same deflection on the galvano-
meter, and thus the same intensity of current through the relay, whether star transits
or signals are being registered.
It will be seen from what follows that the effects due in general to the inertia of
the armatures and other parts of the apparatus are eliminated by this arrangement.
Chronograph,
A small cylinder is rotated uniformly by clockwork, and thus draws along a
ribbon of paper lightly held between this cylinder and a small roller, whose pressure
on the cylinder can be readily adjusted. The ribbon is thus unrolled uniformly. The
motive power of the chronograph is a mainspring ; and the governor is a thin
vibrating spring resting on the escape wheel.
On the ribbon rest two pens, each with a reservoir of ink, and with specially
arranged points ; and as the ribbon is unrolled these pens describe parallel lines upon
it, distant about 4 mm. from each other.
The first or clock-pen is actuated by the armature of the electro-magnet E a ;
and when a current passes through E I} the pen is jerked aside. The second pen is
similarly actuated by E 2 . Since the 'clock circuit is closed (or broken) every two
seconds, the first pen notches its trace at regular intervals corresponding to 2 seconds ;
and the other trace is notched whenever the observing button is pressed. The clock
circuit is as follows : the negative pole of a battery being put to earth, the positive is
led to the terminal a : and when the commutators c and c' are both closed, the circuit
there divides into two, one branch passing round the electro-magnet E T and so to earth,
the other from b, to b', V, I", b", (i.e., through the clock springs) thence to d, e and so
to earth. When the clock springs are closed, the resistance of the latter circuit is so
small that the current practically passes through it alone ; but when these springs
are separated; the other course is the only one open, and the electro-magnet attracts its
armature.' The pen-trace is thus notched when the clock breaks its circuit.
It is to be further remarked that when the relay R is at rest the terminals b, p, q,
are connected ; but when a current passes through this relay this circuit is broken
and r s is joined up. Thus if c alone be opened the current passes through c', q, p, b,
22 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
and the clock to earth, or if the springs be opened through c', Ej : if c f alone be
opened then when the clock springs open the current passes through c, b, p, <j, Ej.
If, however, the relay armature be attracted neither of these courses is open.
Star Transits.
The arm C being placed in the position marked " Star Transits ", when the
observing tapper t is pressed a current passes from the local battery through the
terminal I and the electro -magnet E 2 to C, 1, 2, 3, B, t, and A, where it divides, one
portion going through the galvanometer along w, u>, <, (>', through the relay to p, r, 4, 5,
and earth ; and the other through X -^ to the rheostat and thence to earth. The
resistance of the rheostat is so adjusted that the fraction of the current passing through
the galvanometer (and therefore the relay) is of a certain definite strength (say X),
which can be also produced in the transmission of signals.
Parallax of pens for star transits: To properly compare the notches' of the
observing pen with those of the clock pen, it is first necessary to displace the pens
simultaneously and measure the difference between the corresponding notches ; which
should be subtracted as a constant from all measured differences, and is called the
" parallax of the pens." Now whenever the observing tapper is pressed the connection
p q is broken and r s made : and if, at the same time, the commutator c be opened
(c' remaining closed), the current from the clock battery can no longer escape
through q, p, b and the clock, but passes through a, c', E a to earth, and so moves the
clock pen. The two pens are thus moved at the same instant as required. It is, of course,
possible that there is a small difference between the minute time required for breaking the
circuit by the clock springs and that by the relay springs ; and if so, the parallax of
pens as above determined is in error to this extent. But all the signals will be
similarly affected if we take care that the current by which the relay is actuated is the
same in all cases, and this is the reason for the galvanometer, and the reduction of the
current through the relay to the constant strength X. For if the star transits and
signals be all affected with the same e.rror, the result on the longitude is zero.
Sending Signals.
The signals sent to the distant station are also registered on the chronograph.
In this case the arm C is placed in the position " Sending." The current from the
line-battery is led to the terminal L, passes thence through the circuit L y S 3 B t A
(when the tapper t is pressed) and there divides, one portion going through the
galvanometer and relay, and the other through the rheostat, just as in star-transit
observations. But when the relay is attracted, the circuit of the local battery is
CHRONOGRAPHS, &c. ; METHODS OF OBSERVATION. 23
closed along I, E 2 , C, a, e, e', e", s, r to earth, and hence the observing pen is moved.
It is necessary, however, to adjust the rheostat so that the current through the relay
is still X, so that in the operations for parallax of pens (which must be repeated here
also, and in which the current must, of course, be the same as in actual signalling)
the relay may be attracted in the same manner throughout. For this parallax we
again cut the connection c, and, as before, the two pens are moved, if not simul-
taneously, at least at times separated by the same minute interval as before.
Receiving Signals.
For receiving signals, the arm C is placed in the third position. The signals
arrive by the line I/ and pass thence along n X. There the current divides, one
portion passing along A, w, &>', (f>, <p', to earth, through the galvanometer and relay
as before : and the other through the rheostat, along >//, p, T, ^, 5, to earth. The
rheostat is adjusted as before so that a current X passes through the galvanometer
and relay. When the relay is attracted, the circuit from the local battery
I, E 2 , C, e, e', e", s, r to earth is completed, and the observing pen is moved. Also
as before, if c be cut, the current from the clock battery works the clock pen when
the relay is attracted, and the parallax of pens is thus determined.
Thus in all three cases of star transits, sending and receiving signals, the pens
are moved by equal currents under similar conditions.
It is important that the relay be very sensitive, so that it may be worked by
feeble currents from a great distance.
VII. METHODS OF OBSERVATION.
The general methods of observation of both observers were the same, and the
following remarks will thus apply to either instrument indifferently.
At the commencement of each evening it was usual to observe the nadir, by means
of the Bohnenberger eye-piece, and an amalgamated-copper mercury trough. Six coin-
cidences of the middle wire, with its image, were observed in each position of the
instrument, the mean of the twelve giving the reading for collimation ; but the
micrometer was always left at some convenient whole division near the concluded
reading for collimation, which varied very little from day to day after the object glasses
had been fixed firmly in their cells, as before mentioned. (See p. 8.)
24 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
The course of the night's work will be best understood from the following scheme
of an ideal night, which was adopted in actual practice as nearly as circumstances would
permit.
I. Nadir Observation ; and readings of level W and E.
II. Transit of a Pole Star E and W.
Ill Transits of 10 Clock Stars W.
IV. Transit of a Pole Star W and E.
V. First Exchange of Signals.
VI. Transits of 10 Clock Stars E.
VII. Transit of a Pole Star E and W.
VIIL Transits of 10 Clock Stars W.
IX. Second Exchange of Signals.
X. Transit of a Pole Star W and E.
XL Transits of 10 Clock Stars E.
XII. Transit of a Pole Star E and W.
XIII. Nadir Observation ; and readings of level W and E.
Observations of the hanging level were to be made two or three times during each
series of 10 Clock Stars, and with each Pole Star in each position. It is, of course,
immaterial whether observations are commenced E or W ; it will be noticed that
the above scheme commences W, and leaves the instrument E for the following night.
Observations of Pole Stars were generally made by turning the R.A. micrometer
until the middle vertical wire (or sometimes one of the other wires, for which due
correction was made) bisected the star, the instant of bisection being registered on the
chronograph, and the reading of the micrometer-head being called out to an assistant,
or entered directly by the observer. Ten such bisections, or sometimes 20, were made
at each transit.
Occasionally transits of the more rapidly moving circumpolars were observed in the
ordinary way over the galvanic wires : 'and one or two such observations were made by the
eye and ear method, near the beginning of the operations ; but this method of observation
METHODS OF OBSERVATION. ERROR OF COLLIMATION. 25
was very soon given up for that of using the R.A. micrometer, which was found more
expeditious, and quite as accurate, besides allowing of a large number of bisections
at the same transit, whereas the number of vertical wires is limited.
The mean of each group of five consecutive readings of the micrometer was taken,
and the mean of the corresponding five registered times. To the latter was applied a
correction equal to the time required by the star to travel the distance represented by
the difference between the mean reading of the micrometer, and the adopted reading
for collimation ; and thus the time of transit over the middle wire was obtained. The
accordance inter se of the results from the different groups of five bisections was a check
on the accuracy of the reduction, and a safeguard against mistakes of large amount
in the record.
VIII. ERROR OF COLLIMATION.
This error was determined by nadir observations, and by observations, of the
same circumpolar star in reversed positions of the instrument. In the following tables
are given all the results obtained for collimation. In column 1 is the date, and the
adopted reading for line of collimation, at which the R.A. micrometer was left when
not in use for nadir or circumpolar observations. The reading 10 r> 000 corresponds
to the middle of the comb. In column 2 is the star's name, and in column 3, the error
of collimation of the middle wire deduced from observations of that star in reversed
positions of the instrument. The simple mean of such results is taken for each night.
In column 4 are the errors of collimation deduced from nadir observations and means,
lu column 5 is the difference between nadir and circumpolar determinations, and in
column 6 the corresponding weight " J? " : in and n being the number of nadir and polar
determinations respectively. It is assumed that for the purposes of this discussion the
probable errors of the two classes of observations may be taken to be approximately
equal ; but the results would obviously not be sensibly affected by a modification in the
method of computing weights. The weighted mean of these differences is very
small in both cases ; and it is considered that there is no sensible systematic difference.
Accordingly the mean of the results from stars, and from the nadir observation, has
been adopted as the collimation error for each evening, and is exhibited in column 7.
The collimation of Transit C apparently changed during the evening of October 19 (not
included in the following table), and the various groups of observations on October 19
were accordingly treated separately. The collimation error is considered applicable
directly to position W, and with reversed sign to position E.
GREENWICH OBSERVATIONS, 1899. d
26 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
Transit B.
Date and
Adopted
Reading.
STAB.
Deduced
Collimation
Error.
(P)
Nadir
Observa-
tion.
(N)
N P
Weight.
Adopted
Collimation
Error.
Sept. 30
Bradley 2701
//
-1- I'O7
O'OO
"
"
io r -i30
Bradley 1672 S.P
- 1-62
Polaris
..._ o'72
O'J-C
w q.)
0-42
*23
+ 'I9
2
- '33
Oct. i
Groombridge 3548
( 0-6a}
0*67
io r -i4o
\ v u y/
- '45
...
0-56
0-56
Oct. 3
Groombridge 3548
( O'7O^
io r- i5o
Bradley 3 1 4.7 . . .
\ v ly/
!!?
Bradley 1672 S.P
O'oc
Polaris
1-66
roi
-0-95
I '01
o - o6
2
0-98
Oct. 5
Groombridge 3548
( 2-28}
+ o'i8
io r -i8o
Bradley 1672 S.P
+ Q--1 2
+ O'62
+ '33
+ 0-40
+ 0-07
I
+ 0-37
Oct. ii
Groombridge 3548
( o-c8)
O'I7
io r -i8o
Bradley 2003...
O'OQ
Bradley 1672 S P.
/>
+ O'62
Polaris
O'C4.
O'o6
O'OO
O'I2
O'I2
2
0-06
Oct. 13
Bradley 3 1 47
O'O7
o-co
io r -i8o
Bradley 1672 S.P
O'7Q
+ O'I2
- 0-43
0-19
+ 0-24
2
0*31
Oct. 14
Bradley 3147...
+ O'2O
+ 0-28
io r -i8o
2 Ursae Minoris
+ 0'08
0-67
+ 0-14
O'2O
-0-34
2
o - o3
ERROR OF COLLIMATION.
27
Transit B. continued.
Date and
Adopted
Reading.
STAR.
Deduced
Collimation
Error.
(P)
Nadir
Observa-
tion.
(N)
N P
Weight.
Adopted
Collimation
Error.
Oct. 15
Bradley 2993
+ 2-06
//
0'84
."
//
io r -i8o
Bradley 3 1 4.7 .
+ I'S2
0-84
+ 179
0-84
-2-63
2
+ 0-48
Oct. 17
Bradlev 2007 .,
O*7 I
o - c6
io r -i8o
Bradley 3 14.7
... I '76
Bradley 1672 S.P
o-8c
o'84.
PI i
070
+ D'4 1
2
0-91
Oct. 1 8
Bradley 2007 .,
0*74.
+ 0-06
+ 0-80
I
0-34.
IO r '2OO
Oct. 19
Polaris R.P
... O'2 I
0-28
io r -i8o
Bradley 2007
Bradley 314.7
u /y
Bradley 1672 S.P
- 1*1.1
+ 0-28
- 0-72
O'OO
+ 072
3
0-36
Oct. 20
Bradley 3 1 4.7
- O* 1 1
O'I7
io r -i8o
Polaris
I '2Q
O'^Q
^7
-071
- 0-28
+ o'43
2
0-50
Oct. 21
Bradley 2997
-1- o - 6o
O'CO
io r -i8o
Bradley 314.7
PCS
2 Ursae Minoris
O'OC
I -06
-0-31
0-78
- 0'47
2
-0-55
Oct. 23
Bradley 2003 .
+ O"2.1
IO r '2OO
Bradley 3 1 4.7
+ O'QA
2 Ursae Minoris
w VT
4- 0-78
0-17
Polaris
0*18
+ 0-44.
- 0-17
o - 6i
2
+ 0-14
Oct. 24
Bradley 2003
O'C C
+ O'22
4- O'77
I
O'I7
IO r '2OO
Oct. 25
Bradley 2003
+ o*6j.
+ 0-64.
IO r '2OO
28 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
Transit B. continued.
Date and
Adopted
Reading.
STAR.
Deduced
Collimatiou
Error.
(P)
Nadir
Observa-
tion.
(N)
N P
Weight.
Adopted
Collimation
Error.
Oct. 26
Bradley 2003 ....
It
0*60
"
'
"
IO*'2OO
Bradley 16728.?
+ 2'OI
+ o - o6
Polaris
H- l'37
+ 0-90
+ O'o6
- 0-84
2
+ 0-48
Oct. 27
Bradley 1672 S.P
o-n
O - J7
IO r '2OO
Polaris
+ O*34
+ O'l I
+ O'll
0-03
0-14
2
+ 0-04
Oct. 28
Bradley 2993
O*6c
-t O'22
+ 0-87
I
O'22
Oct. 30
Bradley 1672 S.P
4- O'Sc
IO r '2OO
2 Ursae Minoris
O'OS
Polaris
0*06
+ 0-61
+ 0-25
+ 0-61
+ 0-36
2
+ 0-43
Nov. 9
2 Ursae Minoris
4- 1*57
-1- oo6
IO r- 2OO
Polaris
+ 0*6^.
Groombridge 2283 S.P
O'77
-f" 0*22
+ 0-61
+ 0-14
-0-4-7
2
+ 0-38
Nov. 13
Bradley 1 1 4.7
-+- 0*22
_L_ O'^O
IO r '2OO
2 Ursse Minoris
0-70
Polaris
4- I '2?
+ O'28
+ 0'26
+ 0-34
+ 0-08
2
-f 0-30
Mean
O'OQ
37
W 7
f
ERROR OF COLLIMATION.
29
Transit G.
Date and
Adopted
Reading.
STAR.
Deduced
Collimation
Error.
(P)
Nadir
Observa-
tion.
(N)
N P
Weight.
Adopted
Collimation
Error.
Sept. 3O
//
//
I'CI
"
//
Q r 'QOO
1*74
i'63
...
-I-6 3
Oct i
Bradlev 3 14.7 .
1*12
-1-63
Q r- QOO
- 1-57
I -60
0-48
I
- 1-36
Oct 2
Bradley 2993 .
I 2 C
2'O2
o'6?
I
i *6o
9 r 'QOO
W 7
yu*.
Oct. 3
I'll
i -8 c
Q r 'QOO
Polaris
2'CO
2-19
1-80
2'O2
O - 22
2
- 1-91
Oct. 5
Groombridge 3548
(- 7'37)
2-24
9 r 'QOO
Bradley 3147
2*96
Polaris
2*17
2-64
2-56
- 2 '44
+ O'I2
2
2-50
Oct. n
Groombridge 3548
(+ o-c6)
+ I'I2
9 r 'O4.O
Bradley 2993 ....
O'T.1
7T"
Bradley 3147
+ O'I C
Bradley 1672 S.P
+ 0*4.4.
4- I'CO
O*OO
i^ * 5y
+ 0-46
+ 0-56
+ o-io
3
+ 0-51
Oct. 13
Groom bridge 3548
(+ O-IQ)
9 r 'Q4.O
Bradlev 2QQ3 ..
+ I'? 1 ?
Bradlev 314.7
-1- I'O7
Bradley 1672 S.P
+ I"O
+ O'I7
+ I-28
+ 0-17
I'll
2
+ 073
30 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
Transit C. continued.
Date and
Adopted
Reading.
STAR.
Deduced
Collimation
Error.
(P)
Nadir
Observa-
tion.
(N)
N P
Weight.
Adopted
Collimation
Error.
Oct. 14
Groombridge 3548 ...
( \-\6\
//
II
"
9 r '94
Bradley 2003 .
\ * j"/
+ Q'A1
Bradley 314.7 ..
U t3
2 Ursae Minoris ...
u 31
o - i8
Polaris
Polaris
U / L
0^84
*
u 3y
- 0-34
0-17
+ 0-17
3
0-26
Oct. 15
Bradley 2003 ..
q r 'QAO
Bradley 314.7 ..
_L o'88
+ 0-54
+ 0-06
0-48
I
+ 0'30
Oct. 17
Bradlev 2003
9 r '94-
Bradley 3147...
o 47
2 Ursae Minoris
o 53
Polaris
u yz
0*67
53
-0-15
0-67
-0-52
2
0-41
Oct. 20
X Ursss Minoris
_l_ 0-16
I O'o6
9 r '94
Bradley 2003
O'O2
0*62
+ 0-07
0-28
- 0'35
2
o-n
Oct. 21
Bradley 2003 ..
O r 'O4O
Bradley 3 1 4.7
1'62
Bradley 1672 S.P.
u 5z
u iy
- 0-88
- '39
+ 0'49
2
0-64
Oct. 23
Bradley 314.7 ..
9 r '94
2 Ursaa Minoris
U i/
1-26
+ O* I I
- 071
+ O'll
+ 0-82
I
0-30
Oct. 26
0-28
9 r -8co
+ 0-28
O'OO
+ 0'02
I
O'DI
ERROR OF COLLIMATION.
31
Transit C. continued.
Date and
Adopted
Reading.
STAR.
Deduced
Collimation
Error.
(P)
Nadir
Observa-
tion.
(N)
N P
Weight.
Adopted
Collimation
Error.
Oct. 27
Bradley 2007...
+ 1 ' 3A
+ OH5
n
//
9 r -8 5 o
Bradlev 3147...
1 JT
A- O"7 I
0-06
2 Ursas Minoris
4. i-6c
Polaris
4- 0-28
+ O' 17
+ I-OO
+ 0-18
0-82
3
4-0-59
Oct. 30
Bradley 3147
4- 0-8?
+ 0-28
9 r -Q4O
Bradley 1672 S P.
O'ZJ.
2 Ursa; Minoris
+ O'26
Polaris
0*36
4- 0-67
+ O'I2
4-0-48
4-0-36
3 '
4- 0-30
Nov. 9
Bradlev 11 47...
O'I7
+ O'22
9 r '94
'2 Ursse Minoris
4- O'O7
Polaris
-1- O"27
4- 0-05
4- O'22
4- 0-17
2
4-0-14
Nov. 13
Bradley 3 1 47
+ 0-14
4- o'i I
O r -Q30
Bradley 1672
+ O'7O
Polaris
+ o-6c
4- 0-28
+ '5
4- 0-20
0-30
2
+ o-3S
Mean . ..
015
33
If the adopted Collimation error in the last column be denoted by c, and x denote
the diurnal aberration, viz : //- 20 for Transit B at Paris, and 0"*19 for Transit C
at Greenwich, then the whole Collimation error applicable W is c + x ; and E
is c + x.
On Oct. 19, the results obtained for Collimation with Transit C were as follows :
G.M.T.
h ill
8.26 Bradley 2993 4- 5-69
9. 32 Bradley 3147 4- 3-13
10.22 Bradley 1672 S.P. 4- 3-41
11.26 Polaris 4- 1-63
12. o Xadir 4- i'68
32 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
The Nadir was unfortunately not observed early in the evening ; the only
observation was at the same time as Polaris. For reduction of the observations the
following Collimation errors have been adopted :
G.M.T.
h m h m
To 8. 30 + 5-69
8. 30 to 9. 30 + 4-48
9. 30 to 10. 25 + 3-27
10.29 to 1 1. 20 + 2-46
11.25 to end + 1^65
IX. LEVEL ERROR.
The Level Error was determined several times during each set of observations by
the hanging level, and once or twice during each evening by the nadir observation.
In the latter, the pivots were assumed sensibly equal (see p. 18), and the simple
difference of the readings of the R.A. micrometer for coincidence of the middle wire
in reversed positions of the instrument was considered to be twice the error of level.
From the following tables it will be seen that there is no systematic difference between
the level as deduced by nadir observations, and the mean of the determinations E
and W by the hanging level (which again do not differ systematically inter se,
see p. 19). The determinations by hanging level generally largely outnumber those by
nadir : but the latter has the advantage of being a completely independent method of
determining level ; and as the level error enters directly into the longitude (with
weight proportional to secant latitude), and is entirely independent of any astronomical
observations, it is important to employ independent methods in order to eliminate
possible systematic error. Accordingly, considerable weight has been given to nadir
observations, and the adopted level error has been formed by taking the simple
arithmetical mean of the mean results from nadir W and E, hanging level W,
and hanging level E, no distinction being made between results obtained by the
hanging level at different Z.D.'s, or at different periods of the evening. By this
method something is of course lost in apparent accordance of the observations ; but the
same mean result for longitude is obtained as by a more elaborate and troublesome
process.
The first five columns of the following tables require no explanation. The weight
in the sixth column is computed from the formula ^-, where m is half the total
number of striding level determinations, and n is the number of nadir determinations,
The adopted level error in the seventh column is the mean of the results for each day
found in the second, third, and fourth columns.
ERROR OF LEVEL.
Transit B.
Date.
Hanging Level.
Nadir.
W + E
Weight.
Adopted Level
Error.
W.
K.
2
Sept. 30
- 4-22
-3-56
- 4-01
-4-15
-4-27
"
"
- 4 - 45
4-01
- 5'45
-5-82
-4-19
- 5'39
Oct. I
- 5-23 - 5'44
0-26
3
- 4-69
-47
4-50 4-86
0-85
0-28
-0-44
-0-53
0-50
Oct. 2
- o'53
- '59
- i'5>
roo
2
- 0-84
-0-55
0-46
- i'5i
- 1-72
Oct. 3
- 1-13
- '93
- 0-66
- 1-18
- i '43
I-2I
I-04
Oct. 4
Oct. 5
- o-77
- 0-86
0-69
- 1-23
- 0-32
+ 0-04
2
I
I'02
0'80
0-96
- 0-86
- 1-23
0-87
- 071
-0-99
- 0-68
0-78
- 079
- 0-84
0-78
- "64
- -38
- -62
- -98
-61
- 1-89
- 174
1-98
1-90
- 1-61
1-90
-1-78
IM2
+ 0-29
3
- 1-70
.- 17
1-90
-,- 5I
GREENWICH OBSERVATIONS, 1899.
34 TELEGRAPHIC DETERMINATION OP LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
Transit B. continued.
Date.
Hanging Level.
Nadir.
W + E
Weight.
Adopted Level
Error.
W.
E.
2
Oct. 8
- 178
"
- 1-62
"
Oct. 9
- 1-70
- 1-46
- 2-18
0-60
1
- I 7 8
Oct. 10
- 173
- 1-07
1-40
o-oo
I
- 1-40
Oct. 1 1
- 0-19
- 0-20 _ 1-18
0-46
0-07
0-46
- 1-23
0-46
0-96
0-64
0-05
0-14
0-26
0-14
0-58
0-90
0-38
-0-49
- 1-04
o - 6o 3
- 0-63
Oct. 12
0-42
0-28
- 1-18
-0-41
- 0-42
-0-35 _ 1-18
- 79
i
- 0-65
\
Oct. 1 3
- 0'49
O-22
IT2
-
I '01
- 0-68
O'22
- '57
O'gO
0-06
- 0-85
- '33
- '55
0-28
- 0-84
- '47
0-09
-074 - 1-74
0-69
- '43 - i'43
- 0-87
3
0-85
Oct. 14
- 0-63
- 0-58
- 1-62
- -40
- 79
- -26
- 0-66
- -04
- I- i3
'12
- 0-91
- -48
0-22
- 0-66
- '39
0-05
0-28
0-96
i
0-06
0-90
- 0-87
0-65 1-26
-0-50
3
- '93
ERROR OF LEVEL.
35
Transit B. continued.
Date.
1
Hanging Level.
Nadir.
N-^E
Weight.
Adopted Level
Error.
W.
E.
Oct. 1 5
a
Q'(>3
-0-52
//
-0-39
"
//
-0-54
0-28
0-63
i -02
i -06
0-85
- 0-33
- i''5
-0-55
- i'45
- 2-03
- 1-42
- 2 -07
1-46
- I- 45
- i-S7
ro8
- o-75
- 0-98
0-06
3
- '94
Oct. 1 6
- 1-16
0-80
1-40
-0-42
i
I-I2
Oct. 17
-0-53
-o-53
0-90
0-09
- 0'39
- 0-82
0-14
-
0-16
0-50
- '44
0-05
0-06
0-22
- 0-38
o-oo
- '43
+ O'O6
0-05
0-90
0-36
0-20
- 0-90
0-62
3
- '49
Oct. 1 8
+ 0-08
+ 0-27
O'l I
+ 0-06
+ 0'47
+ 0-14
+ o-i i
+ 0-30
+ 0-30
+ 0-17
+ 0-37
o-i i
- 0-38
2
+ OT4
Oct. 1 9
+ 2-H
+ '5 2
- 0'33
+ i'33
. 0-50
+ 0-42
- '33
- '&3
0-76
- '39
0-36
- 0'39
0-28
- 0-58
- 0-88
0-41
- 074
0-63
0-50
-0-33
-0-47
0-06
o-oo
- o'43
0'20
+ O'O2
3
O'2I
1
1
36 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
Transit B. continued.
Date.
Hanging Level.
Nadir.
W + E
Weight.
Adopted Level
Error.
W.
E.
2
9
*
Oct. 20
o-l I
- 1-81
-0-55
- o'88
+ O'll
1-46
0-82
0-60
no
0-61
078
Oct. 21
-0-52
1-64
- 1-19
+ 0-64
3
-077
- 1-07
0-89
- 0-34
0-50
-0-33
0-85
0-90
-0-93
o'4i
1-51 0-72
- 0-66 - 1-84
0-09 i '95
- Q'39
0-60
I'OO
- 0'94
0-80
Oct. 23
0-50
0-50
+ OM9
3
0-82
- 77
I'OO
070
0-85
- 0-97
I'20
-I- 5 8
- 1-25
- 1-18
Oct. 24
0-90
- '95
- 0-66
O'lO
2
I'll
- 1-03
- 1-13
- 1-18
- 1-29
-1-65
Oct. 25
1-09
- 1-85
0-41
I
- 1-58
- 1-23
-1-65
- 1-85
- 0-88
- 0-68
0*36
-0-17
-075
- 0-52
- 077 - 0-27
ERROR OF LKVEL.
Transit B. continued.
37
Hanging
Level.
Nadir
W + E
Weight.
Adopted Level
Date.
z
W.
E.
H
Oct. 26
+ 0-68
+ 0-82
+ 0-41
+ 0-52
+ 079
+ 0-49
+ i'34
+ 1-16
+ I'l?
+ I'OI
+ 0'33
+ 0-64
+ 0-69
+ 0-67
+ 076
+ i'34
+ 0-62
2
+ 0^2
Oct. 27
+ 0-50
+ 0-81
+ I'I2
.
+ 0-97
+ i -06
v
+ o'53
+ 0-89
+ no
+ I'02
+ 0-96
+ 0-66
+ 0-88
+ 0-28
+ 0-84
+ 0-82
+ 079
+ 0- 9 8
+ 0-17
3
+ 0-86
Oct. 28
+ 0-57
+ 074
+ I'I2
+ 0-52
+ 0-27
+ 0-57
+ 0-51
+ I-I2
+ 0-58
i
+ 073
Oct. 30
+ -82
+ i '93
+ '84-
4- 1-87
+ 75
+ '55
+ 71
+ 2'OI
4- 173
+ 1-90
+ 2'OI
+ 0-19
2
+ 1-88
Nov. 9
- 0-86
- 0-97
- 0-84
i-oo
- 1-14
- 074
- 077
0-83
- 1-24
- 1-68
- '93
0^96
- 1-26
-0-31
3
- 1-05
38 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
Transit B. continued.
Hanging Level.
Date.
Nadir.
N W + E
Weight.
Adopted Level
Error.
W.
E.
z
<
lf
rt
Nov. i o
- 0-85
1-08
- 1-27
- 1-50
- 1-23
-1-58
- '97 - 1-45
-1-23
O-O2
2
P22
Nov. 12
O'll
o-i i
-0-55
O'lO
+ 0-55
0-06
+ 0-69
+ 0-28
+ 0-50
4- O'lO
O'l 1
+ 0-50
+ 0-5I
I
+ 0-16
Nov. 1 3
+ 0-55
+.0-33
o-oo
O'OO
+ 0-34
+ O-I2
O'2O
+ 0-5I
+ 0-28
+ 0-06
+ O'l I
+ 0-4.7
o-oo
0-03 -4- 0-34
-0-30
+ 0-28
+ 'Z9 + 0-03
+ 0-31
+ 0-I5
3
+ 0-21
The mean value of N
W + E.
itha weight of 61.
2 1S O 14 A
ERROR OF LKVEL.
Transit C.
39
Hanging Level.
Date.
Nadir.
2
Weight.
Adopted Level
Error.
W.
E.
Sept. 30
+ 3-34
+ 4''
+
"
"
+ 3'33
~T" 4-*OO
+ 3 - 5 8
+ 4-01
+ 3'02
~T~ ^ " C O
+ 374
+ 3-14
-0-5,
2
+ 3-48
Oct. i
+ 3'o6 + 2-47
+ 2-30
+ 2-67
+ 2-04
+ 2-90
+ 3'3<5
,
+ 3 '02
+ 3'34
+ 3-5
+ 3-29
+ 2-46
+ 2-91
+ 3'o
+ 2-38
0-58
3
+ 277
Oct. 2
+ 1-56
+ 1-36
+ 1-85
+ 0-99
+ i'39
+ 1-28
+ 1-38
+ 1-85
+ 0-52
i
+ 1-5
Oct. 3
+ 0-08
+ 078
O'OO
+ '33
+ i '03
+ 0-83
+ ''57
+ 0-51
+ '44
+ 1-13 o-oo
-0-79
2
+ '52
i
Oct. 4
0-63
-0-57
o-i i
+ '49
I
- '44
Oct. 5
- 0-68
0-08
-0-17
- 79
- 0-27
0-09
0-22
0-14
0-30
-0-49
0-46
1
- 0-84
+ 0-06
- 0-51
- 0-27
0-06
+ 0-33
3
0-28
Oct. 8
- 177
- 0-97
- 2-23
- I'OI
2-OO
- '97
roi
+ 0-48
i
-i-33
40 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
Transit C. continued.
Date.
Hanging Level.
Nadir.
N W + E
Weight.
Adopted Level
Error.
W.
K.
IN
2
n
H
Oct. 9
2'22
- i'49
I-OI
- 2-14
- i"47
- '47
- 1-24
- 2-18
- 1-48
- 1-13
+ 070
2
I '60
Oct. 1 1
- 3-52
- 2'47
- 3-08
-2-91 -2-34
2-31 2-42
- 3'5 2 - z '39
- 271 - 2-37
- 2-69 - 3-14
- *'99
- 3'43
- 274
-2'95
-2-65
- 2-91
O'll
3
2-84
Oct. 13
- 2-27
- ''44
- -66
- - 99
- -86
- 1-27
- '9 1
- '99
- '37
- i-i7
- "45
- '97
^- 0-61
0-61
- 1-35
- 175
I'OI
- 1-35 +0-03
2
- I'37
(Jet. 14
- 2-15
- i'34
- 2-35
- 2-26
- i'55
- 2-17
0-63
- - i7
0-69
-0-79
i-io
0-96
- i'44
- 1-85
- 171
- no
2-10
0-69
3
1-64
Oct. 1 5
- 1-28
- 2-43
- 3'3
'
- 3' 2
- 2-18
- 2-23
- 2-15
- 2-28
- 3-03
- 0-81
2
- 2'49
ERROR OF LEVEL.
41
Transit C. continued.
Date.
Hanging Level.
Nadir.
W + E
Weight.
Adopted Level
Error.
W.
E.
2
Oct. 17
-In.
- 2-88
"
"
"
- 3'3
- 3'53
-2-78
- 2-95
-3-85
- 2-41
3'^9
- 2-57
- 372
3 - oi
- 3-55
-3-iS
- 3'"
- 3-25
- 3'5
2-96
- 3-25
O'O2
2
- 3^4
Oct. 1 9
3-26
3-00
- 3''4
-2-85
- 3'39
3 - oi
- 3-27
2'JI
- 376
-3-65
3'8o
- 3 '42
- 3'47
2-84
- 3'4 2
O-26
2
-3-24
Oct. 20
2-26
- r88
2-06
- r86
- 1-86
-1-58
~ r 57
- 1-05
- 1-27
- 2-24
-,- 97
-1-53
- 2-05
0-30
2
-r8 5
Oct. 2 1
- 3-4I
- 2'53
3-29
- 2-37
- 379
-2-67
- 3'37
2 '90
- 3 '42
- 3'34
- 3'22
- 370
-3-46
2-84
- 37
-0-55
2
- 3'33
Oct. 23
-378
-'94
-3-58
2-40
4-28
-1-56
- 1-50
-2-78
-2-85
- 2-16
- 3-42
- 3-03
- 2-17
-3-42
-0-82
2
- 2-87
GREENWICH OBSERVATIONS, 1899.
42 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
Transit C. continued.
Date.
Hanging Level.
Nadir.
W + E
Weight.
Adopted Level
Error.
W.
E.
Z
//
Oct. 24
- 2'93
-3-52
- 2-52
+ 07*
I
-2-99
Oct. 25
- 2-91
- 2-86
2'8o
+ 0-09
i
- -86
Oct. 26
- ''35
- 1-28
- 1-85
- 3'"
-2-50
- 2-18
- 3-11
1-90
- '73
+ 078
2
- 2-25
Oct. 27
- 2-30
2'12
2-96
- '79
-2-38
-0-95
- 2-50
I'I2
2-OO
2-08
i'53
-1-64
- 2-35
- 2-13
- 1-62
276
- 2-35
- 1-62
- 2-35
-0-36
2
z-ii
Oct. 29
-2-56
- 1-24
- 1-68
-0-33
-1-52
- 1*45
- 1-24
+ 0-25
I
- 1-41
Oct. 30
- 2-16
2-04
2-96
- 2-31
270
- 2-25
-278
- 3'5
-2-48
-2-30
- 178
-3-38
- 3'20
- i '97
- 3'99
-274
- 2-31
-3H8
-0-95
3
-2-84
Oct. 31
- 1-62
- 273
- 3-92
- 1-24
i
- 3'9
ERROR OF LEVEL.
Transit C. continued.
43
Hanging Level.
Date.
Nadir.
W -4- E
Weight.
Adopted Level
Error.
2
W.
E.
n
tl
It
Nov. 6
- S'9
- 479
5 oQ
-4-50
-3-36
-4'37
3-36
-3-82
3-80
-4'55
-3-28
- 3'49
- 4'47
3-68 - 5-89
- 1-82
2
- 4-68
Nov. 9
- 3'4 6
- 3'4'
-4-61
-5-58
- 4'43
5 "4-6
^
-6-17
- 4-68
-4-98
4-58
-4'53
-3-85
-4-04
-473
-4-52
-5-21
- 0-58
2
4-82
Nov. 10
6 -20
-4,0
- 5-05
+ o-io
I
5-12
Nov. 13
+ 0-13
+ 0-37
+ 0-17
+ 0-05
+ 075
+ 0-03
+ 0-63
+ 0-82
+ 0-05
0-64
+ 0-63
0-64
+ 0-05
+ o-io
+ 0-41
0-06
+ 0-40
+ 0-16
+ 1-22
+ 0-33
+ 0-5I
+ 0-60
+ I '08
+ '45
+ 076
+ 0-48
-0-17
+ o-i i
+ 0-56
o-oo
-0-34
3
+ 0-22
The mean of N is o" '28 with
a weight of 54.
2
44 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
X. AZIMUTH ERROR.
The Azimuth Error was determined by the observation of one or more of the
following Polar Stars. In the first column is given the usual name of the star in the
Greenwich catalogues ; in the second, the name used by the French observers ; in
the third, the approximate N.P.D. ; in the fourth, the mean R.A. for 1888'0 adopted
in the preliminary calculation of azimuth, as taken from the catalogues mentioned in
the fifth column, F representing the French Ephemeris in the " Connaissance des
Temps " ; L, M. Lcewy's Supplementary Catalogue (" Epheme'rides des etoiles de
culmination lunaire et de longitude "), and G. 7 , the Greenwich Ten- Year Catalogue,
1880. In the columns 6-9 are given the corrections to these adopted places indicated
by the Greenwich Transit- Circle Observations in 1888 and 1889 respectively, and the
numbers of observations; and in columns 10 and 11 the weighted means of these
corrections. In the final calculation of azimuth these weighted means have been
adopted as the corrections applicable throughout to the apparent places of these stars
given in the Ephemerides.
Star's Name.
3
is
?
Adopted
Mean R.A.
1888-0.
Catalogue.
Correction from
Greenwich
Observations,
1888.
No. of
Observations.
Correction from
Greenwich
Observations,
1889.
No. of
Observations.
8
S a
fa
^1
*i
Greenwich.
French.
X Ursae Minoris
Qroomb. 1 119 S.P....
Bradley 2701 . .
A Pet. Ourse.
f
i- 3
I. 2
8.57
8.58
3- 26
4.27
4.21
3.19
1.4.1
4 .2I
I. 17
2. 2O
h m
19.35.44-07
7.44.27-34
2O. 33. 52-06
20.35.14-13
2I.2I.5P35
22.22. 6-58
22. 22. 31*41
23.27.49-99
12. 14. l8'57
0-53-3374
1.17.43-81
15. 13.34-64
F.
F.
L.
G,
F.
L.
G,
F.
F.
L.
F.
F.
s
+ 0-71
+ 6-64
+ 0-14
0-04
0-96
- 0-17
-0-35
+ 1-67
-0-13
+ 0-21
- 3'57
18
9
i
12
II
16
'Si
22
2O
93
I
+ 1-28
+ 6-36
+ 0-05
O'lO
- 0-45
+ 0-38
- 0-17
+ 274
O - 2O
+ 0-87
- I'?'
22
4 2
28
'7i
21
25
33
32
18
IO2
32i
8
+ 1-02
+ 6- 4 I
+ 0-08
O-O7
0-63
+ 0-16
0-23
+ 2-3
0-16
+ 0-56
- '77
40
51
39i
29*
32
4'
4i
54
38
'95
33*
2320 B.A.C. (P.I.)
7169 B.AC
75 Draconis
7178 B.A.C
Groombridge 3548...
Bradley 2003
7504 B.A.C. . .
3441 Carrington...
Bradley 2997
8213 B.A.C
Bradley 2007
Bradley 3 147
Bradley 16728.?....
2 TJrssB Minoris .
4165 B.A.C. (P.I.)
z Pet. Ourse
Polaris
a Pet. Ourse
Groomb. 2283 S.P...
5i 4 oB.A.C.(P.I.)
ERROR OF AZIMUTH. 45
When several of these stars were observed on the same night, the azimuth error
was calculated from each separately, as follows : The observed time of transit was
first corrected for clock-error. At Greenwich the clock-error was adopted from observa-
tions made with the transit-circle, reduced to the standard observer, Mr Downing ;
for the longitude observations were referred to the same clock (the Sidereal Standard)
as the transit-circle observations ; except that different relays and different chrono-
graphs were used in the two cases, and it was found by experiment that the
total discrepancy thereby introduced was a very small fraction of a second, negligible
in the case of Polar Stars. The adopted errors of the Paris clock were found by
applying an assumed longitude, and the difference shown by the telegraphic signals, to
those of the Greenwich clock. In the preliminary reduction the longitude was
assumed to be 9 m 21 S '00 ; but in the final reduction 9 m 20 5 '60 has been adopted as the
difference of longitude of the Transits B and C. A comparison of the signals at
different times in the evening seems to show that one or both of the clocks has during
the evening a rate different from the mean diurnal rate. As the Greenwich clock is
kept in a room at constant temperature, it was assumed for the reduction of Polar
Stars that this difference was due to the Paris clock, and the rates were adopted
accordingly ; but the small quantities involved have practically no effect on the
reductions for azimuth.
It may be remarked that by this method of obtaining clock-errors, which was
adopted simply for greater convenience, it is assumed that the personal equation of
the observer for Clock Stars has no relation to that for Polar Stars ; if the clock-error
found by the observer himself were used, the azimuths would all be changed by minute
quantities, which would, however, be practically the same for both stations ; so that in
any case the longitude is not affected. The observed transit was then corrected for
collimation and level errors, and compared with the apparent R.A. for the day, found
as above by applying the adopted correction to the apparent R.A. given in one or other
of the Ephemerides ; the difference divided by the azimuth factor gives the concluded
azimuth. The various steps of the operations are exhibited in the following tables.
It may be remarked that no adjustment for azimuth was made during the operations
for longitude, so that the changes in azimuth from day to day are due to weather or
local disturbances.
46 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
Transit 13.
Date
and
Observer.
Star.
Position.
Observed
Transit.
Clock
Slow.
Correction for
Corrected
Transit.
Apparent
JR.A.
R.A. -
Obs.
Azimuth
Factor.
Error
of
Azimuth.
nSL-l -
Sept. 30
HT
Oct. i
HT
Oct. 3
HT
Oct. 5
HT
Oct. ii
L
X Ursae Minoris
W
W
W
E
E
W
E
W
W
W
E
W
W-
W
E
W
W
E
W
W
W
W
E
W
W
E
E
W
W
E
E
W
E
E
W
19-35- 5-32
19.44.50-17
20.33.43-25
20.33.44-14
20.35. 4'9
21.21.47-55
22. 22. 8-08
O.I3.38-59
o. 13.31-24
0.53.43-68
i. 18. 39-91
1.18.35-58
21. 21. 49-11
21. 21. 47-58
23.28. 075
2O. 35. 10-85
21. 21. 55-08
21. 21. 53-30
23.28. 3-54
23.28. 6-u
0.13.37-85
o. 13. 38-08
0.53.45-24
1. 18. 35-80
1. 18. 45-22
20.33.51-11
20. 35. 12-86
21. 21. 56-07
21. 21. 50-97
22. 22. 14-9!
23.28. 4-48
O.I3.47-99
o. 13. 46-50
21. 22. 1*43
21.22. 2-72
22. 22. 23'IO
22. 22. 22'93
23. 28. 14-70
o. 13. 58-86
o. 14. i -60
0.53.55-96
I. 18.37-25
I. 18.40-43
+ 9-98
+ 9-97
+ 9-88
+ 9-88
+ 9 -88
+ 9-80
+ 9-69
+ 9-50
+ 9-50
+ 9'43
+ 9'39
+ 9'39
+ 8-17
+ 8-17
+ 7-95
+ 4' 68
+ 4-60
+ 4'6o
+ 4'3 8
+ 4-38
+ 4-30
+ 4-30
+ 4-23
+ 4-i8
+ 4-I 8
+ -57
+ '57
+ '49
+ '49
+ -38
+ -27
+ -19
+ -19
- 9-79
- 979
- 9-9 1
- 9-91
10-05
10-14
10-14
10-22
10-27
IO-27
-1-97
+ J'94
0-23
+ 0-06
+0-06
+0-15
0-46
0-30
+ I-2O
-0-47
-I- 5 8
+ 0-39
-0-85
+ 0-40
+ 0-42
-0-51
-I-32
+ 0-87
+ 0-90
I'36
+ 2-68
-1-77
+ 0-69
+ 2-32
-3-52
+ 0-07
+0-07
+0-19
0-64
-0-49
+ O'20
-0-39
+ 1-29
0-16
0-29
O"22
O'I2
0-16
+ 0-32
+0-59
O'I2
-0-43
0-78
13-26
+ I2-/0
- 170
- I 7
- 1-70
- 4-13
- 3-22
+ 779
+ 7'79
- 3-3
10-65
10-65
- '74
- o-74
- 77
- o-37
0-90
0-90
- Q'93
- Q'93
+ 1-70
+ 17
- 0-72
- 2-32
- 2-32
0-62
0-62
- 1-50
- 1-50
- 1-17
- i-55
+ z' 8 3
+ 2-83
0-56
0-56
- o-43
- o-43
- 0-57
+ 1-05
+ 1-05
_ 0-44
- i-43
- 1-43
0-07
1478
51-20
52-3 8
13-14
5317
14-09
S5'5 8
4973
49'34
37-07
3471
55-69
55'4>
8 '35
14-65
57-4 6
57- 8 7
7-89
8-20
46-53
42-31
49-44
39-98
43-56
52-13
13-88
56-25
50-32
14-63
4-40
51-62
51-81
50-92
52-08
12-54
12-47
3-92
50-09
53-10
45-18
25-12
27-95
40-59
377 8
55-52
55-52
17-30
62-94
21-30
30-26
30-26
56-28
59 -I 5
59-!5
62-60
62-60
14-46
16-88
61-96
61-96
14-16
14-16
30-70
30-70
56-30
59-54
59-54
54' 8 5
16-63
61-36
61-36
20-39
13-92
30-87
30-87
59-42
59-42
19-31
19-31
13-17
3'45
3i-45
56-56
61-30
61-30
+ 40-52
-37-00
+ 4-32
+ 3-I4
+ 4 -l6
+ 9'57
+ 7-21
-25-32
-19-47
+ 6-94
+ 22-08
+ 24-44
+ 6-91
+ 7-19
+ 6-ii
+ 2-23
+ 4-5
+ 4-09
+ 6-27
+ 5-96
-15-83
11-61
+ 6-86
+ 19-56
+ 15-98
+ 2-72
+ 2-75
+ 5-11
+ 11-04
+ 5-76
+ 9-52
-20-75
-20-94
+ 8-50
+ 7'34
+ 6-77
+ 6-84
+ 9-25
-18-64
-21-65
+ 11-38
+ 36-18
+ 33-35
-2-390
+2-462
0-229
0-229
0-228
0-684
-0-514
+ 1-546
+ 1-546
0-528
-1-904
-1-904
-0-684
0-684
0-710
0-228
-0-684
0-684
0-710
0-710
+ I- 545
+ 1-545
0-528
-1-904
-1-904
0-229
-0-228
0-684
0-684
-0-514
0-710
+ I-545
+ 1-545
-0-684
0-684
-0-514
-0-514
0710
+ 1-545
+ 1-545
0-528
-1-904
-1-904
16-96
-I5- 3
-18-88
-1372
18-24
-13-98
14-02
-16-39
12-60
-13-14
1 1 -60
12-84
10-10
10-52
- 8-60
- 9-78
- 6-58
- 5-98
- 8-83
8-40
10-24
- 7-51
-12-99
10-28
8-40
-n-88
12-06
- 7-47
16-14
I 1-22
-I3-4 2
-'3-43
-13'SS
12-42
-11-74
-13-18
-13-30
13-02
12-06
14-01
21-56
19-00
-17-52
Groomb. 1 119 S.P...
Bradley 2701
75 Draconis
Groombridge 3548...
Bradlev 2003
Bradley 16728.?....
2 Ursas Minoris . . .
Polaris
Groombridge 3 548 ...
Bradlev 3147
Groombridge 3 548 ...
Bradley 3147...
Bradley 1672 S.P....
2 Ursse Minoris .. .
Polaris ...
Bradley 2701
Groombridge 3 5 48 ...
,,
Bradlev 2003...
Bradley 3147
Bradley 16728.?....
Groombridge 3548...
Bradlev 2QQ3
Bradley 3 1 47 ...
Bradley 16728.?....
,,
2 Ursae Minoris
ERROR OF AZIMUTH.
47
Transit B. continued.
Date
and
Observer.
Star.
Position.
Observed
Transit.
Clock
Slow.
Correction for
Corrected
Transit.
Is
o. w
9
R.A.-
Obs.
Azimuth
Factor.
Error
of
Azimuth.
Colli-
mation.
Level.
Oct. 13
L
Oct. 14
L
Oct. 15
L
Oct. 17
L
Oct. 1 8
L
Oct. 19
L
Oct. 20
L
Groombridge 3548...
Bradlev 3 14.7
E
W
E
W
E
W
E
W
W
E
W
W
E
E
W
E
W
W
E
E
W
W
W
E
W
E
W
W
E
E
W
E
W
W
W
E
21.22. 4-00
23. 28. 17-40
23.28. 17-23
o. 14. 8-06
o. 14. ii-66
22. 22. 3O-I4
23. 28. 19-61
23. 28. ig-lS
o. 54. 4-55
0.54. 4-69
21.22. 873
22. 22. 25-83
22. 22. 29-37
23. 28. 22-84
23. 28. 19-12
22. 22. 58-2O
22. 22. 59-42
23. 28. 26-49
23. 28. 22-46
o. 14. 1 8-47
o. 14. 14-61
0.54. 1179
22. 23. 2-IO
22. 23. 0-83
I3.2O. 0-64
13.19.59-38
22. 23. 1-90
22.23. 3^5
23.28.29-13
23. 28. 27-67
o. 14. 24-10
o. 14. 18-51
23. 28. 29-60
23. 28. 29-90
o. 14. 22-99
I. I 9 . 7-30
i. 18. 59-62
-I3-47
-1372
-13-72
-13-81
13-81
-15-72
-15-85
-15-85
16-02
16-02
-17-83
-17-95
-17-95
1 8-08
18-08
-21-88
-21-88
22-OI
22'OI
22-IO
22-IO
-22-I8
-23-63
-23-63
-2471
-24-71
-25-38
-25-38
-25-51
-25-51
25-60
25-60
-27-86
-27-86
-27-93
-28-08
28-08
+ 0-12
-0-59
4-0-13
+ 1-16
-0-25
O-2O
O'2O
-0-27
O-2O
-0-15
+ 0-3I
+ 0-24
0-58
-0-78
+ 0-32
4-0-61
-0-95
-1-28
4-0-82
0-90
+ 2-52
0-98
0-46
+ O'I2
0-48
+ 1-67
+ 0-14
0-48
0-65
+ 0'l8
0-36
+ I-2 7
+ 0-35
0-81
+ I-59
2-09
+ 0-90
- 75
- 7 8
0-78
+ 1-42
+ 1-42
0-64
- 0-8 5
0-85
- 0-66
- 0-66
0-83
0-65
0-65
- 0-86
- 0-86
- 0-34
- '34
- -45
0-45
+ 0-82
+ 0-82
- o-3S
+ o-io
+ o-io
+ 0-46
+ 0-46
0-14
0-14
0-19
0-19
+ o-35
+ 0'35
070
0-70
+ 1-28
- 175
- 1-75
49-90
2-31
2-86
57-83
O 4 02
I3-58
271
2-21
47-67
47-86
50-38
7-47
10-19
3-12
0-50
36-59
36-25
2-75
0-82
56-29
55-85
48-28
38-11
37-42
35'9 J
36-80
36-52
37-25
2-78
2-15
58-49
54-53
i'39
o-53
57-93
35-38
30-69
58-65
12-76
12-76
31-97
3I-97
18-59
12-53
12-53
56-47
56-47
57-87
i8-35
i8-35
12-31
12-31
42-78
42-78
n-86
n-86
33-15
33-I5
56-30
42-56
42-56
"37
0-37
42-36
42-36
H'49
11-49
33-61
33-6i
11-31
11-31
33-8o
60-42
60-42
+ 875
+ 10-45
+ 9'9
-25-86
-28-05
+ 5' 01
+ 9-82
+ 10-32
+ 8-80
+ 8-61
+ 7'49
+ 10-88
+ 8-16
+ 9''9
+ 11-81
+ 6-19
+ <5'53
+ 9' 11
+ 11-04
-23-14
22-70
+ 8-02
+' 4-45
+ 5-14
-35-54
-36-43
+ 5-84
+ j-ii
+ 871
+ 9'34
24-88
20-92
+ 9-92
+ 10-78
-H -I 3
+ 25-04
+ 29-73
0-684
0-710
0-710
+ ''545
+ ''545
-0-514
0-710
0-710
0-528
0-528
-0-684
-0-514
-0-514
0-710
0-710
-0-514
-0-514
0-710
0-710
+ '545
+ '545
0-528
-0-514
-0-514
+ 2-005
+ 2-005
-0-514
-0-514
0-710
0-710
+ '545
+ I-545
0-710
0-710
+ 1-546
-1-905
-1-905
12-80
-14-72
-'3-94
-16-74
-18-16
- 975
-13-84
-H'54
-16-67
16-30
10-96
-21-17
-15-88
-12-94
16-64
12-04
12-70
12-84
-15-56
-14-98
-14-69
15-20
- 8-66
10-00
-1773
18-17
11-36
- 9'94
- 1-2-26
13-16
16-10
-I3-54
-13-98
15-20
15-61
-13-14
15-61
Bradley 16728.?....
* ...
Bradlev 2003. ..
Bradlev iid.7
2 Ursae Minoris
Groombridge 3 548 ...
Bradlev 2003...
Bradlev 1 1 47 . . .
Bradley 2997
Bradley 314.7...
Bradley 16728.?....
j> ...
2 Ursse Minoris
Bradlev 2007...
Polaris 8 P.
Bradley 2007...
Bradley 3147
Bradley 1672 S.P....
)> ...
Bradlev 3147...
Bradley 1672 S.P....
Polaris ...
48 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
Transit B continued.
Date
and
Observer.
Star.
Position.
Observed
Transit.
Clock
Slow.
Correction for
Corrected
Transit.
Apparent
B.A.
R.A. -
Obs.
Azimuth
Factor.
Error
of
Azimuth.
Colli-
mation.
Level.
Oct. 21
L
Oct. 23
HT
Oct. 24
HT
Oct. 25
HT
Oct. 26
HT
Oct. 27
HT
Oct. 28
HT
Bradley 2997
W
E
E
W
W
E
W
E
W
W
E
W
E
E
W
W
E
W
E
E
W
E
W
W
W
E
W
W
E
W
W
W
E
E
W
22.23. 6-14
22.23. 673
23.28.30-53
23.28.34-51
o. 14. 28-15
0.54. I8-I5
0. 54. 18-22
22. 22. 44*98
22 22 4.4.'? 8
-29-85
-29-85
-29-98
-29-98
-30-07
-30-15
-30-I5
-33^3
-33' 6 3
-3376
-3376
-33-93
-33-93
-33-98
-33-9 8
36-11
36'! I
-38-58
-38-58
41-06
41-06
41-28
-41-28
-41-36
-41-41
-41-41
-42-33
-4-2-43
-42-59
-42-59
-42-65
-42-69
-42-69
-43-97
-43*97
0-65
+ 0-30
+ 0-40
0-87
+ I-70
+ 0-31
-0-66
0-29
0-05
-0-071
-'39
0-05
0-30
1-0 I
-0-18
0-32
O-O2
+ 0-38
-0-72
-0-58
+ 0-24
+ 1-54
0-64
+ 0-25
+ 0-84
2-03
0-18
0-14
+0-54
+ 0-36
0-14
-0-48
-0-72
+ O-O2
0-36
0-56
0-56
- 0-75
- 0-75
+ ''37
- 0-58
0-58
0-76
0-76
i-oi
i-oi
- 0-78
- 0-78
- 2-53
- 2-53
1-09
1-09
0*36
0-36
+ 0-64
+ 0-64
- i-55
- i-55
+ 0-66
+ 2-12
+ 2-12
+ 0'77
+ 0-60
- I'45
- i-45
+ 0-61
+ 1-98
+ 1-98
+ 0-50
+ o'5
35-08
36-62
O-2O
2- 9 I
1-15
4773
46-83
10-30
10-14
59-00
0-8 1
46-86
47-95
35-06
36-94
8-99
8-35
13-02
13-02
12-37
14-36
45'S 1
34'!9
52-06
47-89
53'iz
52-44
12-91
45-07
44-34
52-62
47-27
49-05
11-76
12-50
4''95
4i-95
1 1-14
11-14
34-01
56-20
56-20
16-64
16-64
10-76
10-76
56-15
56-15
61-26
61-26
16-40
16-40
16-15
16-15
15-88
15-88
35-54
35-54
55-97
60-95
60-95
53-49
'5-59
35-99
35-99
55-87
60-72
60-72
'S'3 1
i5-3i
+ 6-8 7
+ 5-33
+ 10-94
+ 8-23
-27-14
+ 8-47
+ 9'37
+ 6-34
+ 6-50
+ 11-76
+ 9-95
+ 9-29
+ 8-20
+ 26-20
+24-32
+ 7-4!
+ 8-05
+ 3-13
+ 3-13
+ 3-51
+ 1-52
- 9-97
+ i-35
+ 3'9 J
+ 13-06
+ 7-83
+ 1-05
+ 2-68
9-08
- 8-35
+ 3-25
+ 13-45
+ 11-67
+ 3-55
+ 2-81
-0-514
-0-514
0-710
0-710
+ 1-546
0-528
0-528
-0-514
-0-514
0-710
0-710
0-528
0-528
1-906
1-906
-0-514
-0-514
-0-514
-0-514
-0-514
-0-514
+ 1-546
+ 1-546
0-52?
1-906
i -906
0-684
-o-5M
+ 1-546
+ 1-546
0-52!-
i-goS
1-908
-0-514
-0-514
-I3-36
-10-38
-15-42
1 1 - 6o
-17-56
16-04
-I7-70
-12-34
12-64
-16-56
14-02
17-60
-I5-54
-13-70
12-76
-14-42
-15-66
6-09
6-09
- 3+2
2-96
- 6'45
+ 0-88
- 7"4'
- 6-86
- 4-u
- i-54
- 5-22
- 5-87
- 5-4i
- 6-16
- 7'5
- 6-1 1
6-91
- 5-47
Bradley 3147 .
Bradley 1672 S.P....
2 TJrssB Minoris
Bradley 2003
Bradley 3147
23.28.33-84
23-28.35-97
o. 54. 21-62
o. 54. 22-96
I. 19. 12-58
1.19.13-63
22. 22.46-51
22.22.45-57
22. 22. 51-58
22. 22. 52-68
22.22. 53-37
22.22.54-54
o. 14. 26-80
o. 14. 17*66
0.54. 32-51
1.19.26-34
I. ig. 34-44
21. 22. 34'l8
22. 22. 54-88
o. 14. 28-57
o. 14. 28-02
o. 54. 34-80
I. 19. 28-46
I. 19. 30-48
22. 22. 55-2I
22. 22. 56-33
2 Ursse Minoris
>
l^olaris ..
Bradley 2993
Bradley 2993
Bradley 2003...
Bradley 16728.?....
II
2 Ursse Minoris
Groombridge 3548...
Bradley 2993 . ..
Bradley 1672 S.P....
ji
2 UrsiB Minoris
>i
Bradley 2993 . .
ERROR OF AZIMUTH.
49
Transit B. continued.
Date
and
Observer.
Star.
Position.
Observed
Transit.
Clock
Slow.
Correction for
Corrected
Transit.
a
t*
X.A. -
Obs.
Azimuth
Factor.
Error
of
Azimuth.
Colli-
mation
Level.
Oct. 30
HT
Nov. 9
HT
Nov. 1 3
HT
Bradley 1672 S.P...
11
2 Ursse Minoris . . .
E
W
w
E
E
W
W
E
E
W
W
E
W
W
W
W
E
E
W
W
E
o. 14. 34-28
o. 14. 38-13
o. 54. 40-61
o. 54. 40-56
I. 19. 36-07
i. '9- 36-43
o. 55. 2-64
o. 55. 5-42
1. 19. 58-73
1. 19. 54-90
3. 14. 9-60
3. 14. 10-77
20. 35. 10-96
20. 36. 33-41
22.23. 3 2 '54
23. 29. 25-09
23-29.25-58
o. 55. 14-69
0.55.15-92
i. 20. 10-76
j. 20. 18-12
-47-25
-47-25
-47-3I
-47-3I
-47-35
-47-35
-74-01
-74-01
-74-06
-74-06
-74-33
-74-33
-83-62
-83-62
-83-87
-84-03
-84-03
-84-23
-84-23
84-28
84-28
+J-42
-0-52
+ 0-2C
-o-St
-1-88
+ 0-69
+ 0-16
-0-51
-173
+'54
0-29
+ 0-95
+ 0-04
+0-04.
+ 0-09
+ OM2
-0-58
-0-44.
+ 0-09
+ 0-30
-1-49
- 3'i;
- 3'i;
+ i"33
+ 1-32
+ 4'^
+ 4'29
- 74
- 74
2-40
2-40
+ 1-24
+ 1-24
+ 0-08
+ 0-08
+ 0-14
+ 0-19
+ 0-19
+ 0-15
+ 0-15
+ 0-48
+ 0-48
45-33
47-23
54-83
54-02
5i-i3
54-06
48-05
50-16
40-54
38-98
56-22
58-63
47-46
9-91
8-90
i-37
1-16
50-17
5I-93
47-26
52-83
37-34
37-34
55-53
55-53
59-88
59-88
54-57
54-57
57-62
57-62
45'35
45-35
48-96
10-92
10-94
4-76
4-76
53-89
53-89
557
55-70
- 7'9<
9'8c
+ o-7<
+ r 5
+ 87
+ 5-82
+ 6-52
+ 4'4 1
+ 17-*
+ 18-64
10-87
-13-26
+ i-sc
+ I'OI
+ 2-04
+ 3-39
+ 3'6c
+ 372
+ 1-96
+ 8'44
+ 2-87
)+i'54<
): + I< 54<
) 0-52:
0-52!
; -1-90!
1-90:
0-52!
0-52!
1-90?
.: 1-90?
+ I-I2<
+ I-l2t
0-229
-0-22?
-0-514
\ 0-710
0-7 ic
0-528
0-528
-1-909
-1-909
5- 5-15
)' 6-40
5- i-33
!;- 2-86
}- 4-58
H- 3-05
! -12-36
1- 8-35
- 8-95
976
i 9-65
1 1 -80
- 6-65
. A'AI
Polaris
2 Ursse Minoris .
Polaris
Groomb. 2283 S.P...
ii
Bradley 2701
75 Draconis ...
Bradley 2993
4 43
- 3-97
- 4-78
- 5-7
: 7-05
- 37i
- 4'42
- 1-51
Bradley 3 14.7
2 Ursee Minoris
Polaris
Transit C.
Sept. 30
L
Oct. i
L
Oct. 2
L
Groombridge 3548...
Bradley 1672 S.P....
Polaris
E
W
E
E
W
E
W
W :
E :
21.21.45-44
o. 13. 26-87
i. 18. 31-78
19. 35. 20-16
SI. 21. 57-52
S3. 28. 6-63
>-}. 28. 9-13
!2. 22. I 8-46
.2. 22. 16-08
+ 11-84
+ 12-14
+ I2-26
+ 15-05
+ 5-96
+ 5-96
+ 5-96
+ 5^3
+ 5'93
+ 1-61
+ 4-13
+ 4-29
+4'34
-173
+ '35
-'79
-1-61
+ 1-29
+ 3-15
6-03
+ 8-25
+ 8-16
+ 2-53
+ 2-61
+ 2-61
+ 1-07
+ 1-07
2-04
37'n
56-58
f77'
4-28
16-55
15-91
'3-85
'4'37
2-94
30-26
59 -I 5
59-19
2-60
14-46
14-46
.0-91
.0-91
4- 0-90
- 6-85
+ 2-57
- 8-52
- 1-68
2-09
- i'4S
- 2-94
- 3'4 6
0-644
+ 1-466
-'795
2-258
0-644
-0-666
-0-666
0-481
0-481
- 1-41
- 4-68
- i-43
+ 3"2
+ 2-61
+ 3'i4
+ 2-18
+ 6-n
+ 7-i9
A Ursae Minoris
Groombridge 3548...
Bradlev 3 1 4.7
Bradley 2993
GREENWICH OBSERVATIONS, 1899.
50 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
Transit C. continued.
Date
and
Observer.
Star.
1
Observed
Transit.
Clock
Slow.
Correction for
Corrected
Transit.
Apparent
E.A.
E.A.-
Azimuth
Factor.
Error
of
Azimuth.
i
Colli-
mation.
Level.
Oba.
Oct. 3
L
Oct. 5
L
Oct. n
HT
Oct. 13
HT
Oct. 14
HT
Bradley 2003
W
E
E
W
W
E
W
E
E
W
W
E
E
W
W
E
E
W
W
E
E
W
E
W
W
E
E
W
W
E
E
E
W
W
E
E
W
W
W
E
E
W
E
22. 22. 19-20
o. 13. 21-18
o. 53. 51-24
- 53- 53-I5
i. 19. 1170
i. 18. 56-88
23.28. 17-94
23. 28. 11-14
o. 13. 11-05
o. 53. 56-62
1.19.15-67
1. 19. 277
21. 21. 56-50
21. 21. 55-26
22. 22. 17-46
22. 22. 16-90
23. 28. 14-21
23. 28. 13-87
o. 13. 8-43
0.13. 6-45
I.I9. 15-39
I. I 9 . 5-97
21. 21. 58-27
21.21. 58-69
22. 22. 13-28
22. 22. I 6-1 5
Z3.28. 12-75
23. 28. 10-30
o. 13. 12-08
o. 13. 7-41
I. 19. 10-02
21.21.59-39
21. 22. 2-82
22. 22. 16-51
22. 22. 17-24
23. 28. n-66
23. 28. 12-48
o. 13. 10-60
- S3- 54-58
o- 53- 54-27
I. 19. 11*13
1. 19. 15-38
I. 19. 10-38
+ 5-9!
+ S'9 1
+ S'9 1
+ S'9 1
+ 5'9'
+ 5'9'
+ 6-16
+ 6-16
+ 6-16
+ 6-16
+ 6-16
+ 6-16
+ 7"i2
+ 7-12
+ 7" 12
+ 7' 12
+ 7-13
+ 7-13
+ 7-14
+ 7-14
+ 7-14
+ 7-14
+ 7-40
+ 7-4
+ 7-40
+ 7-40
+ 7'4'
+ 7 + I
+ 7+1
+ 7-4i
+ 7'4'
+ 7-64
+ 7-64
+ 7-64
+ 7-64
+ 7-65
+ 7-65
+ 7-65
+ 7-66
+ 7-66
+ 7-66
+ 7-66
+ 7-66
-1-80
-3'9'
+ 1-52
-1-86
-6-26
+ 5-12
-3-10
+ 2-67
-5-25
-2-38
8-02
+ 6-88
-77
+ 0-36
+ 0-27
0-60
0-8 1
+0-37
-o-73
+ '59
2-09
+ 0-95
-1-03
+ 0-60
+ 0-46
-0-79
i -06
+ 0-62
-1-23
+ 2-09
-2-75
+ 0-08
-0-50
-o'39
+ 0-06
+0-08
-0-52
+ I - 02
0-40
+ 0'o6
+ 0'2I
-1-34
+ O'2I
+ 0-37
0-90
+ 0-38
+ 0-38
+ I-2 3
+ 1-23
0-26
0-26
+ 0-49
O - 2O
- 0-66
- 0-66
2-60
2-60
2-02
2'O2
- Z'68
- 2-68
+ 4-92
+ 4-92
- 6-74
- 674
- 1-25
- 1-25
0-98
0-98
- 1-29
- 1-29
+ 2-37
+ 2-37
- 3-25
- 1-50
- 1-50
- 1-17
- 1-17
- i-55
- i'55
+ 2-84
- 1-19
- 1-19
- 3-89
- 3-89
- 3-89
23-68
22-28
59-05
57-58
12-58
9-14
2074
19-71
12-45
O'2O
I3-I5
I5-I5
0-25
0-14
22-83
21-40
17-85
18-69
1976
2O-IO
1370
7-32
3'39
5 '44
20-16
21-78
18-81
17-04
20-63
19-28
11-43
5-61
8-46
22-59
2377
17-24
1 8 -06
22'II
0-65
0-80
I5-II
I7-8I
H16
20-73
30-70
56-30
56-30
59^4
59-54
13-92
13-92
30-87
56-34
59-92
59-92
59-42
59+2
19-31
19-31
- 2 '95
+ 8-42
- 275
- 1-28
-12-94
9'6o
- 6-82
- 579
+ 18-42
- 3-86
-13-23
-15-23
0-83
- 0-72
- 3-5 2
2-09
- 4-68
- S-S 2
+ 11-69
+ H-35
12-40
6"O2
- 4-74
- 6-79
- 1-32
- 2-94
6-05
- 4-28
+ H-34
+ 12-69
10-05
- 7'35
IO'2O
4'OO
- 5-18
- 4-7i
- 5-53
+ 10-17
4-18
- 4-33
-13-78
16-48
-13-03
0-481
+ 1-466
-0-495
-0-495
-1-795
-i-795
-0-666
-0-666
+ 1-466
-0-495
-1795
-'795
0-644
0-644
0-481
0-481
-0-666
-0-666
+ 1-465
+ 1-465
-1-797
-1-797
0-644
-0-644
0-481
0-481
-0-666
-0-666
+ 1-465
+ 1-465
-1-796
-0-644
-0-644
0-481
0-481
-0-666
-0-666
+ 1-465
-0-495
-0-495
-1-796
-1-796
-1-796
+ 6-13
+ 5'74
+ 5-56
;+ 2-59
+ 7-21
+ 5-35
+ 10-24
+ 8-70
+ 12-55
+ y8o
+ 7-37
+ 8-48
+ 1-29
+ I-I2
+ 7-32
+ 4-35
+ 7"3
+ 8-29
+ 7-97
+ 774
+ 6-90
+ 3'35
+ 7-36
+ 10-54
+ 2-75
+ 6-1 1
+ 9-08
+ 6-43
+ 774
+ 8-66
+ 5-60
+ 11-42
+ 15-86
+ 8-32
+ 10-76
+ 7-07
+ 8-31
+ 6'94
+ 8-44
+ 875
+ 7-67
+ 9-18
+ 7-26
Bradley 1672 S. P.. .
2 Ursae Minoris
Polaris
Bradley 3 1 47 ...
Bradley 1672 S.I'....
z Ursae Minoris
Polaris
Groombridge 3 548 . . .
,, ...
Bradley 2003...
Bradley 314.7...
1 3 l 1
17-17
Bradley 16728.?....
...
Polaris
3 */
31-45
3I-45
I-30
1-30
58-65
58-65
18-84
18-84
12-76
12-76
3I-97
3 '"97
1-38
58-26
58-26
18-59
18-59
12-53
12-53
32-28
56-47
56-47
1-33
i-33
1-33
Groombridge 3 548 ...
n
Bradley 2003...
Bradley 3 1 47 . . .
Bradley 1672 S.P....
Polaris
Groombridge 3548..
i,
Bradley 2003...
Bradley 3147
Bradley 1672 S.P....
2 Urssa Minoris
1!
Polaris
ERROR OF AZIMUTH.
51
Transit C. continued.
Date
and
Observer.
Star.
d
.2
I
Observed
Transit.
Clock
Slow.
Correction for
Corrected
Transit.
b
<
R.A.-
Obs.
Azimuth
Factor.
Error
of
Azimuth.
Colli-
mation.
Level.
Oct. i,
HT
Oct. 17
HT
Oct. 19
HT
Oct. 20
HT
Oct. 21
HT
Oct. 23
L
Bradlev 200'?
E
W
W
E
E
W
W
E
W
E
E
W
W
W
E
W
E
E
W
W
E
E
E
W
W
E
E
W
E
E
W
1?
"R 1
w
W
E
p
W
E
E
W
22. 22. 18-93
22. 22. l8-6l
23-28. 14-33
23. 28. 16-35
22.22. 15-43
22. 22. 15-50
23. 28. Il-gO
23. 28. 10-68
o- 53- 55-07
o. 53. 56-70
i. 19. 15-18
i. 19. 17-34
21.21. 55'OO
22. 22. 9-93
22. 22. I9'7I
22.22.3578
22. 22. 44-98
23.28.14-39
23.28. 7-17
o. 13. 16-59
o. 13. no
o. 53. 56-47
i. 19. 18-05
i. 19. 8-24
19.35. 22-89
19. 35. 24-04
22. 22. 13-5?
22. 22. 13-62
o. 13. 11-50
0.53. 53-08
22. 22. I4'O3
22. 22. 13-18
23. 28. 9-19
23. 28. Il-gO
o. 13. 10-00
o. 13. 12-36
o. 53. 53-26
Z3. 28. 11-81
23. 28. 11-44
o. 53. 54-02
o. 53. 56-24
+ 776
+ 776
+ 777
+ 777
+ 8-05
+ 8-05
+ 8-06
+ 8-06
+ 8-07
+ 8-07
+ 8-07
+ 8-07
+ 8-35
+ 8-35
+ 8-35
+ 8-35
+ 8'35
+ 8-36
+ 8-36
+ 8-36
+ 8-36
+ 8-36
+ 8-37
+ 8-37
+ 8-37
+ 8-37
+ 8-38
+ 8-38
+ 8-39
+ 8-39
+ 870
+ 8-70
+ 8-71
+ 8-71
+ 871
+ 871
+ 8-72
+ 8-90
+ 8-90
+ 8-90
+ 8-90
-0-42
+ '9
+0-13
-0-57
+ 0-19
-0-52
0-69
+' 2 5
-0-53
+ O'K
+ 0-66
-1-99
+ 6-16
+474
-5-06
+ 474
-5-06
4-00
+ 3-56
6-99
+ 7-85
-2'34
-4'37
+ 3'47
-1-15
-0-26
0-06
-0-27
+ 0-16
0-06
-071
+ 0-39
+0-52
0-96
+ I-88
1-02
+ 0-40
-0-57
+ 0-13
+ 0'IO
-o*43
- 177
- i'77
- 2-35
- 2-35
- 2-31
- 2-31
3-06
3-06
- 2-36
- 2-36
- 770
- 77
2-98
- 2-31
- 2-31
- 2-31
- 2-31
- 3'7
- 3-07
+ S-63
+ 5-63
- 2-37
- 772
- 772
- 5'45
- 5'45
- 1-32
- 1-32
+ 3'20
-- 1-35
- 2-37
- 2'37
- 3-14
- 3-i4
+ 577
+ 577
- 2-43
- 2-71
- 271
2-09
2-09
24-50
24-69
19-87
2 I -2O
21-36
20-72
16-21
!5'93
0-25
2 '60
16-21
I5-92
6-53
20-71
20-69
46-56
45-96
15-68
I 6'02
23-59
22-94
O'I2
I4-33
12-36
24-66
26-70
20-58
20-41
23-25
O'O6
19-65
19-90
I5-28
16-51
26-36
25-82
59'95
'7'43
1776
o'93
2-62
18-35
18-35
12-31
12-31
17-89
17-89
u-86
n-86
56-30
56-30
i-i i
i-u
56-49
17-48
17-48
42-48
42-48
1 1 - 4<
1 1-49
33-6i
33-6i
56-23
1-09
1-09
12-94
12-94
17-28
17-28
33-8o
56-21
17-08
17-08
1 1-14
11-14
34-01
34' 01
56-20
1076
10-76
56-15
56-15
- 6-15
- 6-34
- 7-56
- 8-89
- 3'47
- 2-83
- 4'35
- 4-07
- 3'95
- 6-30
-15-10
-14-81
lO'O/l
- 3-23
- 3'2i
4-08
- 3-48
- 4-I9
- 4-53
+ IO-O2
+ IO-67
~ 3-89
-I3'24
-11-27
II-72
-1376
- 3-3
- 3-13
+ 10-55
- 3-85
- 2-57
- 2-82
- 4'H
- 5'37
+ 7-65
+ 8-19
- 375
- 6-67
7-00
- 478
- 6-47
0-481
0-481
-0-666
-0-666
0-481
0-481
-0-666
-0-666
-0-495
-0-495
-1-796
-1796
-0-645
0-482
0-482
-0-482
0-482
0-667
0-667
+ 1 -464
+ 1-464
-0-495
-1797
-1797
-2-258
2-258
0-482
0-482
+ 1-464
-0-495
0-482
0-482
0-667
0-667
+ 1-463
+ 1-463
-0-495
0-667
0-667
-0-495
-0-495
+ 1278
+ 13-18
+ ii- 3 6
+ 13-34
+ 7-21
+ 5-88
+ 6-53
+ 6-1 1
+ 7-9 8
+ 1273
+ 8-41
+ 8-25
+ I5-56
+ 6-70
+ 6-66
+ 8-46
+ 7-22
+ 6-28
+ 6-79
+ 6-84
+ 7-29
+ 7'86
+ 7-36
+ 6-27
+ 5'20
+ 6-08
+ 6-85
+ 6-49
+ 7'2i
+ 778
+ 5'33
+ 5-85
+ 6-21
+ 8-05
+ 5-23
+ 5'6o
+ 7-5 8
+ IO-QO
+ 10-50
+ 9-66
+ 13-08
Bradley 3147
Bradley 2993
Bradley 3 1 47 .
2 UrstC Minoris
Polaris
Groombridge 3548...
Bradlev 2003...
Bradley 2997
Bradlev 3 14.7
Bradley 1672 S.P....
, ,
2 TJrspe Minoris
\ Ursse Minoris
Bradlev 2003
Bradley 1672 S.P....
2 Ursse Minoris
Bradlev 2003..
Bradlev 3147...
Bradley 1672 S.P....
j)
2 Ursse Minoris
Bradlev 314.7...
2 Ursje Minoris
si
52 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
Transit G. continued.
Date
and
Observer.
Star.
Position.
Observed
Transit.
Clock
Slow.
Correction for
Corrected
Transit.
Apparent
R.A.
R.A. -
Obs.
Azimuth
Factor.
Error
of
Azimuth.
Colli-
mation.
Level.
Oct. 26
L
Oct. 27
L
Oct. 30
L
Nov. 9
L
Nov. 1 3
L
Polaris . .
W
E
W
W
W
E
E
W
W
E
E
W
W
E
E
W
W
E
W
E
E
W
W
E
E
W
W
E
E
E
W
E
I. 19. 26-47
I. 19. 26-32
O. 12. 57'O4
22. 22. 44-00
22. 22. 4I-2I
23. 28. 12-08
23. 28. 13-71
o. 53. 58-97
o. 53. 56-08
1. 19.24-75
I. 19. 26-42
23. 28. 21-00
23. 28. ig'OS
O. 12. 48-37
o. 12.49-44
o. 54. 1-57
o. 54. i- 1 1
i. 19. 39-82
i. 19. 37-71
23.28. 7-67
23.28. 7-28
-53- 54-85
o- S3- 54-73
i. 19. 16-20
i. 19. 17-79
23. 28. 9-48
23. 28. 9-16
o. 13. 10-76
o. 13- 7-56
- S3- 57-94
1.19.25-55
i. 19. 21-69
3- 12. 16-09
+ 8-58
+ 8-58
+ 8- 5 8
+ 8 7 I
+ 8- 7 I
+ 872
+ 8-72
+ 872
+ 8-72
+ 8-72
+ 8-72
+ 8-86
+ 8-86
+ 8-86
+ 8-86
+ 8-86
+ 8-86
+ 8-86
+ 8-86
+ 8-40
+ 8-4
+ 8-40
+ 8-40
+ 8-40
+ 8-40
+ 8-23
+ 8-23
+ 8-23
+ 8-23
+ 8-23
+ 8-23
+ 8-23
+ 8-23
O'6o
-0-54
+ '45
0-67
+ 0-32
+ 0-46
0-90
0-69
+ o'35
+ 1-19
-2'33
-0-57
+0-13
-0-25
+ i-ii
-0'43
+ Q-IO
+'33
1-46
0-06
-0-38
0-29
0-04
-0-15
-0-99
0-62
+ 0-18
0-36
+ 1-22
0-48
-1-61
+ 0-48
+ 0-88
- 5'35
- 5'35
+ 3^9
- -5
- -50
- '99
- '99
- '54
- '54
- 5-01
- 5-01
2-69
2-69
+ 4'93
+ 4'93
2'08
2-08
- 6-78
- 6-78
- 4-55
- 4-55
- 3-51
- 3'S 1
1 1 -46
1 1-46
+ 0-21
+ 0'2I
- 0-38
0-38
+ 0-16
+ 0-52
+ 0-52
- 0-27
29-10
29-01
9-96
50-54
48-84
19-27
19-54
5-46
3'6i
29-65
27-80
26-60
25-38
1-91
4'34
7-92
7-99
42-23
38-33
11-46
10-75
59-45
59-58
12-99
I3-74
17-30
17-78
18-25
16-63
5-85
32-69
30-92
24-93
0-95
0-95
35'H
40-15
40-15
9-73
973
55-87
55-87
072
072
8-86
8-86
37'34
37-34
55-53
55-53
59-88
59-88
6-16
6-16
54-57
54-57
57-62
57-62
4-76
4-76
43-84
43-84
53-89
5570
55-70
45-23
-28-15
-28-06
+ 25-18
-10-39
- 8-69
- 9-54
9-81
~ 9-59
- 774
-28-93
27-08
-17-74
-16-52
+ 35-43
+ 33'oo
-12-39
12-46
-42-35
-38-45
- 5-30
- 4'59
- 4-88
- 5-01
-15-37
16-12
-12-54
13-02
+25-59
+27-21
1 1-96
-36-99
-35-22
+ 20-30
-1-799
-1-799
+ i-4 6 3
0-482
0-482
0-667
0-667
-0-495
-0-495
1-800
1-800
0-667
0-667
+ 1-463
+ 1-463
-0-495
-o-495
i - 8oo
1-800
-c-667
0-667
-0-495
-0-495
1-800
1-800
0-667
0-667
+ 1-463
+ i-4 6 3
-0-495
1-800
1-800
+ 1-069
+ 15-65
+ 15-60
+ 17-20
+ 21-56
+ 18-04
+ I4-30
+ 1470
+ I9-38
+ 15-64
+ 16-08
+ 15-04
+ 26-60
+ 24-76
+ 24-19
+ 22-6o
+ 25-04
+ 25-18
+ 23-52
+ 21-36
+ 7-95
+ 6-88
+ 9-86
+ IO-I2
+ 8-54
+ 8-96
+ 18-80
+ 19-50
+ 17-50
+ 18-60
+ 24-18
+ 20-55
+ 19-56
+ 19-00
Bradley 1672 S.P....
Bradley 2007...
Bradlev ^ 1 4.7 ...
2 TJrsse Minoris
Polaris
Bradley 3147
Bradley 1672 S.P....
>
2 Ursse Minoris
Polaris . . ...
Bradley 3 147 ..
2 Ursse Minoris
Polaris
Bradlev 3 14.7...
Bradley 1672 S.P....
2 Ursse Minoris
Polaris
Groomb. 2283 S.P...
The results obtained from different stars were then carefully compared. It was
seen at once that the results obtained from Groombridge 3548 were not nearly so
accurate as others ; the star is very faint, and there was often much difficulty in
observing it. It was therefore determined not to use observations of this star either
for eollinution or azimith. The other stars do not appear to be entirely free from
ERROR OF AZIMUTH.
53
systematic errors. On discussing the deduced azimuth errors after the manner of
personal equations, and separating the E. and W. positions of each instrument, the
following corrections were found to be necessary to reduce the results to Polaris as a
standard.
Transit B.
Transit C.
M
r.
E
\v
r
E
HT.
L.
HT.
L.
HT.
L.
HT.
L.
Polaris S.P
II
- 6-1
"
li
2*1
//
H
//
"
A. Ursse 11 inoris
VI
I '7
O'l
-4- i-o
Groombridge 1119 S.P
Bradley 2701....
- i '4
- 2-8
-4- O'7
7 5 Draconis ...
+ I'?
3-8
Groombridge 3548
+ 4'1
+ ?'8
+ O'7
4- A'O
4- 4-'3
+ O'
O'O
O'2
Bradley 2993
-1- O'A.
+ m
4- 0-6
4- 2'C
O*d.
4- 0-6
-I- o'^
Bradley 2997
+ 1-6
4. c-o
4- I'd
+ 5'Q
y W 3
0*7
_(_ r-o
Bradley 314.7 ..
O'C
+ I '2
o*c
+ 1-6
4- O'4.
O'O
O'O
i 5 u
+ O'3
Bradley 1672 S.P
2 Ursa? Minoris
+ o-i
O'7
- 7
2'Q
- 0-4
2*2
+ I'S
3*7
4- 0-3
O* I
- 0-6
O' I
+ '-4
4- re
+ n
4- 2'I
Polaris .*.
* 7
Groombridge 2283 S.P
0-6
-4'5
It does not appear possible to formulate any general principle of interpreting
these results, and the quantities involved are generally small. Next to the obvious
inaccuracy of Groombridge 3548, the case of 2 Ursae Miuoris is most remarkable,
especially for longitude reductions. The systematic error, whatever it may be, seems
to be different at Paris and at Greenwich. It is to be remarked also that Polaris S.P.,
Groombridge 1119 S.P., Bradley 2701, 75 Draconis, and Groombridge 2283 S.P. were
observed at Paris but not at Greenwich, and <> Ursse Minoris only once at Paris ; and
that the results from Bradley 2993 and Bradley 2997 show traces of inaccuracy.
There remain, however, three stars Bradley 3147, Bradley 1672 S.P., and Polaris
which give very consistent results and are well observed, at least one of them being
observed on each night.
In forming adopted azimuths, therefore, two suppositions have been made,
(a) That all concluded errors of azimuth are of equal value.
(6) That only those deduced from the three stars Bradley 3147, Bradley 1672
S.P., and Polaris should be used to the exclusion of the others. The adopted
azimuths formed on both these suppositions are given in the following tables. The
54 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
truth probably lies somewhere between the two ; and as the effect of substituting (b)
for (a) on the longitude is very small, there is no need to discuss the matter in
further detail.
It will be seen from the following tables also that the mean difference between the
azimuths in the two positions of the instrument is sensibly zero, and the same azimuth
(the simple mean of those found in the two positions) has been adopted for use in
both positions.
Transit B.
Deduced
Azimuth.
a.
b.
W.
E.
W E.
Weight.
Adopted
Azimuth.
W E.
Weight.
Adopted
Azimuth.
Sept 30
H
i6'o6
ft
n
//
n
n
Groomb. 1119 S.P. ...
Bradley 2701
- i5'3
18-88
Bradley 2701
IV72
75 Draconis
lS'24.
Bradley 2003 ..
I4.-O2
Bradley 1672 S.P....
Bradley 1672 S.P. ...
2 Ursse Minoris
I 2 '60
IVI4.
- 16-39
Polaris
II '60
I2'8j.
Mean (a) ....
ij.'6o
I C'3O
+ O*7O
c
IJ-'QC
Mean (b)
I 2* IO
14/62
+ 2'C2
2
13*36
Oct. i
Bradley 3 14.7...
8-60
8'60
- 8-60
Oct. i
7 5 Draconis . .
Q-78
Bradley 314.7 ..
8*83
Bradlev 3 id.7
8-4.O
Bradley 1672 S.P. ...
Bradley 1672 S.P. ...
2 Ursaj Minoris
T w
IO-24
- 7-51
Polaris
"VV
IO-28
Polaris . . .
S-AO
Mean (a) .
O'2 1
A.
Q'C6
Mean (//)
y *
Q'OI
V V
8-87
O-I4.
2
8-04
Oct. 5
Bradley 2701
11-88
75 Draconis
12 '06
Bradley 200? ..
I I'22
Bradley ? 1 47 . .
I 3 M2
Bradley 1672 S.P. ...
Bradley 1672 S.P. ...
Mean (a)
- '3'43
I2'7O
- J 3'55
I 2'3Q
O*3 1
3
I2-: c
Mean (b)
- I3-43
- '3-55
+ O'I2
1
- 13-49
ERROR OF AZIMUTH.
Transit B. continued.
Deduced
Azimuth.
a.
*.
W.
E.
W E.
Weight.
Adopted
Azimuth.
W E.
Weight.
Adopted
Azimuth.
Oct. ii
Bradley 2993
"
II
"
"
<
Bradlev 200?
11"*Q
Bradley 3 1 47
I VO2
Bradley 1672 S.P. ...
Bradley 1672 S.P....
2 UrsB Minoris
14-01
I2'O6
2 I'C6
IQ'OO
I 7' C2
Oct 13
Mean (a)
Mean (b)
Bradlev 314.7 ..
- 14-90
- 1577
14/72
- 1179
- 14-69
3 i
4
- I3'35
i -08
2
-""
Bradley 3 1 47 ...
I 3*Q4
Bradley 1672 S.P....
Bradley 1672 S.P....
Mean (a)
- 1674
i -73
1 3 VT
- 18-16
i6-oc
2
I C'73
16*05
9
,
2
l^'8q
Oct. 14
Bradley 2993
Q-7C
Bradley 3 1 47
Bradlev 3147 .
7 1 3
I4.-C4
- I3-84
2 Ursse Minoris .
16-67
2 Ursse Minoris
16-30
Mean (a)
13-65
I C"O7
+ I-42
2
14-36
Mean (b) .
I4'C4
I 3-84
O'7O
,
14' 1Q
Oct. 15
Brnrllev 2003 ..
21-17
Bradlev 2003
ic-88
Bradlev 3147
12*94
Bradlev 3 1 47
16-64
Mean (a)
18-91
I4.'4.I
4'IQ
2
- 1 6-66
Mean (Jj)
l6"64
12'OJ.
3-70
I
I4'7Q
Oct. 17
Bradley 2997 .,
12'Od.
Bradlev 2007 ..
I2'7O
Bradlev 3 147 ..
12-84
Bradley 3147
15*56
Bradley 1672 S.P....
Bradley 1672 S.P. ...
- 14-69
I C*2O
- 14-98
Mean (a)
IV86
,
7
I4'O3
Mean (b)
13-77
I C'27
+ i'5
2
14-1:2
56 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
Transit B. continued.
Date.
Star.
Deduced Azimuth.
a.
6.
W.
E.
W E.
Weight.
Adopted
Azimuth.
W E.
Weight.
Adopted
Azimuth.
Oct. 19
Oct. 20
Oct. 21
Oct. 23
Oct. 26
Polaris S.P
18-17
- 9'94
12-26
- '3'54
- 13-48
12-90
15-20
15-61
- 13-14
- 13-65
- 13-65
- 13-36
1 1 -60
- lyS 6
- 17-70
15-06
- H-SS
12-64
- 16-56
17-60
12-76
- 14-89
14-66
2-96
+ 0-88
- 7'4'
- 6-86
- 4'9
- 2-99
- I7-73
II'36
13-16
16-10
- H'59
- i4- 6 3
- 13-98
15-61
14-80
14-80
- 10-38
- i5'42
16-04
- '3-95
- 15-42
- 12-34
14-02
- I5-54
- i3'7o
- 13-91
- 13-86
3-42
- 6-45
- 4-11
- 4-66
- 5-28
//
+ I'M
+ I-I5
I'll
0-98
+ 0'57
4
2
3
4
4
//
- 14-04
- H -2 3
- I4-5I
- H'4
- 4-38
+ 173
+ 1-15
+ 0-84
- 0-80
+ 2-29
2
2
I
2
2
- J 3'77
- H-23
15-00
14-26
4-14
Polaris S.P .
Bradley 2997
Bradley 2997
Bradley 3147
Bradley 3147...
Bradley 1672 S.P
Bradley 1672 S.P
Mean (CL)
Bradley 3147 ... .
Bradley 3 14.7 ..
Bradley 1672 S.P. ...
Polaris . ...
Polaris . . .
Mean (a)
Mean (b)
Bradley 2007 ..
Bradley 2997
Bradley 3147 ..
Bradley 314.7 ..
Bradley 1672 S.P
2 UrssB Minoris
2 UrsEe Minoris .
Mean (fl)
Mean (b)
Bradley 2003 .
Bradlev 2003
Bradley 114.7 ..
Bradley 3147
2 TJrsse Minoris .
2 Ursse Minoris
Polaris
Polaris
Mean (a) ..
Mean (b)
Bradley 200.3 .
Bradley 2993
Bradley 1672 S.P. ...
Bradley 1672 S.P. ...
2 TJrsse Alinoris
Polaris
Polaris .
Mean (a)
Mean (b)
ERROR OF AZIMUTH.
57
Transit B. continued.
Date.
Star.
Deduced Azimuth.
a.
b.
W.
E.
W E.
Weight
Adopted
Azimuth.
W E.
Weight
Adopted
Azimuth.
Oct. 27
Oct. 30
Nov. 9
Nov. 1 3
Bradley 2993
//
- 5-22
- 5'4'
- 6-16
- 7'OS
- 5'9 6
- 6-23
6-40
- i'33
- 3-05
- 3'59
- 473
12-36
- 976
- 9' 6 5
- IO- 59
- 976
- 6-65
- 4'43
- 3-97
- 478
- 37'
- 4'4z
- 4'64
4-60
ft
- 5-87
- 6'ii
- 5 '99
- 5-99
- 5'iS
- 2-86
- 4-S8
4-20
- 4-87
- 8-35
- 8-95
1 1 -80
- 97
- 8-95
- S'7
- 7'5
- ''Si
- 4'54
- 3'*9
+ 0-03
+ 0-61
0-89
O'lO
3
3
3
4
H
~ 5-9 8
- 3'9
10-15
- 4-59
//
- 0-24
+ 0-14
0-8 1
- 1-31
2
2
I
2
a
- 6-ji
4-80
- 9'3<5
- 3'95
Bradley 1672 S.P. ...
Bradley 1672 S.P. ...
2 Ursa; Minoris
Polaris
Polaris
Mean (a)
Mean (&)
Bradley 1672 S.P. ...
Bradley 1672 S.P. ...
2 Ursa; Minoris
2 Ursse Minoris
Polaris
Polaris
Mean (a)
Mean (b)
2 Ursae Minoris
2 Ursse Minoris
Polaris
Polaris
Groomb. 2283 S.P....
Groomb. 2283 S.P. ...
Mean (a)
Mean (b)
Bradley 2701..,
75 Draconis
Bradley 200.3
Bradley 3 1 47 . .
Bradley 3 1 4.7 . . . ,
2 Ursse Minoris
2 Ursa; Minoris
Polaris
Polaris
Mean (a)
Mean (b)
The mean value of the difference W E is - o"'2O with weight 55, or + o"-26 with weight 30, according ai
method a or method b is used.
GREENWICH OBSERVATIONS, 1899.
TELEGRAPHIC DETERMINATION ov LONGITUDE, PAEIS-GREENWICH, MADE IN 1888.
Transit C.
Deduced
Azimuth.
a.
6.
W.
E.
W E.
Weight.
Adopted
Azimuth.
W E.
Weight.
Adopted
Azimuth.
Sept. 30
Bradley 1672 S.P. ...
Polaris
//
- 4 '68
//
1*4.3
*/
//
tt
//
Mean (a)
4-68
1*4.3
V2C
I
vo6
Mean (b)
4-68
I '4.3
3'2C
j
3*06
Oct. i
A. Ursse Minoris
+ 3'O2
Bradley 314.7 ;...
4- 3'14.
Bradley 3147
4- 2-18
Mean (a)
4- 2-18
4- vo8
O'QO
1
4- 2-6-?
Mean (b)
+ 2-18
+ 3*14.
o'o6
I
+ 2-66
Oct. 3
Bradley 2993
+ 6-13
^u
Bradley 1672 S.P. ...
2 Ursse Minoris . . .
+ 574
4- S'CO
2 Ursse Minoris ....
+ 2* CQ
* 3V
-1- 7'2I
Polaris
+ C'?C
Mean (a)
4- T3i
4- !;
O'24-
i
4- C'4.3
Mean (b)
+ 7*21
4- I-??
4- 1-66
j
4- 6-38
Oct. 5
Bradley 3 1 47
4- 10*24.
Bradley 3 1 47
4- 8-70
Bradley 1672 S.P. ...
2 Ursse Minoris
+ 7-80
+ iz-55
Polaris
4- 7*37
Polaris
4- 8-4.8
Mean (a)
4- 8*4.7
-1- Q'QI
I'4.4.
7
4- Q'lQ
Mean (b)
+ 8-81
7 y'
4- Q'QI
I'lO
2
4- 0-36
Oct. 1 1
Bradley 2993
4- 7*32
T^ 77*
Bradley 2993
+ 4.'^?C
Bradley 3 1 4.7
-1- 7*O^
Bradlev 3 1 4.7
4- 8'2Q
Bradley 1672 S.P. ...
Bradley 1672 S.P. ...
Polaris
+ 7'97
4- 774
+ 6'QO
Polaris
4- vis
Mean (a)
4- 6'73
-i- 6'Ci
4- O'22
a.
4- 6*62
Mean (b)
4- 6-C4.
4- 7'22
- 0-68
3
+ 6-88
Oct. 13
Bradley 200? .
4- 2'7S
Bradley 2003 ..
4- 6'ii
Bradley 3147
4- O'o8
Bradley 3147 ...
4- 6*4.3
Bradley 1672 S.P....
Bradley 1672 S.P. ...
Polaris
+ 774
4- 8-66
4- ?'6o
Mean (a)
4- t; - 64.
4- 7'^6
I'll
5
4- 6-Co
Mean (5)
4- 7'o8
4- 7'78
O'7O
2
4- 7'4.3
ERROR OF AZIMUTH.
Transit G. continued.
59
Star
Deduced
Azimuth.
a.
6.
W.
E.
W E.
Weight.
Adopted
Azimuth.
W E.
Weight.
Adopted
Azimuth.
Oct. 14
Bradlev 200 ? ..
//
+ 8-12
it
//
n
II
//
Bradley 2993
+ 10*76
Bradley 3147
Bradley 3 147
_u 8*31
+ 7'7
Bradley 1672 S.P. ...
2 Urssa Minoris
2 Ursaa Minoris
Polaris
+ 6-94
+ 8-44
+ 8-75
4- 7-67
Polaris
4- Q'i8
-4- 7-26
Mean (a)
4- 8-24.
4- 8--JO
o'o6
e
+ 8-27
Mean (b)
+ 8-14.
4- 7--2-I
4- 0-8 1
5
4- 7'7A
Oct. 1 5
Bradley 2003 ..
+ 12-78
r / /I-
Bradley 2003
+ 13-18
Bradley 3147
+ 11*36
Bradley 3147
+ 17*34.
Mean (a) ..
+ I2'27
4- i^'o6
0-70
2
+ 12*67
Mean (6)
+ H - 36
+ i i'i
1-08
I
+ 1 2'^ C
Oct. 17
Bradley 2003 ..
+ 7'2I
** J3
Bradley 2993
+ S*88
Bradley 3 1 4.7 . .
5
+ 6-c;
Bradley 314.7 ..
4- 6-n
2 TJrsae Minoris
+ 7'Q8
2 Ursaa Minoris
-1- 12*7^
Polaris
4- 8'J.i
Polaris .... ...
4- 8-21;
4- 7'i6
4- 8-62
i '46
_j_ 7-80
Mean (6) ......
+ 7-3Q
4- 7-26
+ O'l^
2
J. 7-5<
Oct. IQ
Bradley 2003
/ J7
+ 6-70
T / 33
Bradley 200? ..
4- 6-66
Bradley 2997
+ 8-4.6
Bradlev 2007 ..
4- 7*22
Bradley 3147 ,
4- 6-28
Bradley 314.7 ..
4- 6'7Q
Bradley 1672 S.P. ...
Bradley 1672 S.P....
2 Ursae Minoris
+ 6-84
+ 7'*9
4- 7-86
4- 7-*6
Polaris
4- 6-27
Mean, (a)
+ 7'OI
4- 7- i i
O'lO
f
4- 7'o6
Mean (b)
4- 6-6?
4- 6-08
J
O"JC
4- 6-81
I - y
60 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
Transit G. continued.
Deduced .
Azimuth.
a.
b.
W.
E.
W E.
Weight.
Adopted
Azimuth.
W-E.
Weight.
Adopted
Azimuth.
Oct. 20
A Ursae Minoris
//
4- ^'2O
"
//
//
//
it
A. TJrsse Minoris
+ 6-08
Bradley 200? ..
+ 6-8c
Bradley 2003 ..
+ 6"4.Q
Bradley 1672 S.P....
+ 7'2I
+ 7-78
Mean (a)
4- V8c
+ 6-q8
I'll
i
+ 6-42
Mean (b)
+ 7'2I
+ 7'21
Oct. 2 1
Bradley 2003 ..
+ vw
Bradley 2003 ..
+ 5'8<:
Bradley 3 14.7 ..
+ 6-21
Bradley 314.7 ..
4- 8-oc
Bradley 1672 S.P. ...
Bradley 1672 S.P. ...
2 Ursae Minoris
+ 5-23
+ 5 '60
+ 7'l8
Mean (a)
4- 6'2O
', 3
+ 6-11
O'l I
l
+ 6-26
Mean (b)
+ 6-64
+ !>'QI
+ 73
2
+ 6-28
Oct 23
Bradley 3147
-f- lO'OO
Bradley 114.7 ..
+ 10-50
2 Ursa) Minoris
+ q-66
2 UrsaB Minoris
+ iro8
Mean (a)
4- I I-C4
+ 10-08
+ 1-46
2
+ IO-8I
Mean (6)
4- IO-OO
+ 10-50
0-50
I
4- 10-25
Oct 26
Polaris
+ i?-6
Polaris
+ i t'6o
Bradley 1672 S.P. ...
Mean (a)
+ 17-20
+ 16-41
+ 1 5 '60
+ o-8t
I
4- 16-02
Mean (b)
+ l6'4.1
4- i c-6o
+ '83
I
+ 16-02
Oct 27
Bradley 2007
-4- 2PC6
Bradley 2007 ..
+ 18-04
Bradley 3147 ..
+ I4'<iO
Bradley 114.7 ..
+ 14-70
2 Ursse Minoris
4- IQ'lS
2 Ursse Minoris
+ HJ'64
Polaris
+ 1 6-08
-1- I C-O4.
+ 16-02
+ 17-67
- i-6c
4.
+ 16-84
Mean (6)
-4- I ?'IQ
4- I4.-87
4- 0-32
2
4- is-o?
ERROR OF AZIMUTH.
61
Transit G. continued.
Deduced
Azimuth.
a.
b.
W.
E.
W E.
Weight.
Adopted
Azimuth.
W E.
Weight.
Adopted
Azimuth.
Oct. *o
Bradley 3147 ..
//
+ 26-60
//
//
n
//
Bradley 3147
+ 24/76
Bradley 1672 S.P. ...
Bradley 1672 S.P....
+ 24 -I 9
+ 22-60
+ 2 C'OJ.
2 Ursa Minoris
+ 2C'l8
Polaris
+ 23'C2
Polaris
-1- 2I'*6
Mean (a)
+ 24." 4.1
+ 2VQO
+ O'CI
4.
+ 24'l6
Mean (b)
+ 14.' 1 6
+ 2VC2
+ 0-64
3
+ *3 >8 4
Nov Q
Bradley 314.7 ..
-1- 7'QC
Bradley 314.7 ..
~ / 73
+ 6-88
2 UrsEe Minoris
+ q-86
2 Ursse Minoris
-f- IO'I2
Polaris
4- 8-1:4.
Polaris
+ 8-06
Mean (a)
+ 8-87
+ 8-C7
+ O'?O
3
4- 8'72
Mean (b)
+ 8-2C
+ 7'Q2
+ O'33
2
+ 8-09
Nov. 1 3
Bradlev 114.7 .
-f 18-80
Bradley 114-7 ..
4- IQ'^O
Bradley 1672 S.P....
Bradley 1672 S.P....
2 Ursae Minoris
+ 17-5
+ 18-60
+ 24-18
Polaris
4- 2O'CC
4- iq - c6
Groomb. 2283 S.P....
Mean (a)
+ i8-8c
+ 19-00
+ 20-21
- 1-38
4
+ IQ'54-
Mean (b)...
+ 18-85
+ IQ'^2
0-47
3
+ 19-09
The mean value of the difference W E is - o"-$6 with weight 55, or - o"'!5 with weight 88, according as
method a or method b is used.
62 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
XL TABLE OF ERRORS.
In the following table, the various instrumental errors, adopted for the separate
days, are collected for convenience of reference.
Transit B.
Transit C.
Date.
Collimation.
Level.
Azimuth.
Collimation.
Level.
Azimuth.
W.
E.
W.
E.
//
a
//
If
//
September 30
-0'53
+ 0-13
- 4' 6 9
~ H'95
- 1-82
+ i'44
+ 3-48
3-06
October i
0-76
+ 0-36
0-84
- 8-6c
- i-55
+ 1-17
+ 2'77
+ 2 '63
3
- L'l8
+ 0-78
I'02
- 9'5 6
2-10
+ 172
+ 0-52
+ 5'43
5
+ 0-17
- -57
- 170
- I2 '55
2-69
+ 2-31
0-28
+ 9''9
ii
0-26
0*14
0-63
- I3-35
+ 0-32
0-70
2-84
+ 6-62
13
-0-51
+ o-ii
0-85
- 15-89
+ 0-54
0-92
- l'37
+ 6-50
14
-0-23
- 0-17
- '93
- 14-36
- 0-45
+ 0-07
1-64
+ 8-27
15
+ 0-28
0-68
- "94
- 16-66
+ o-i i
-0-49
- 2 '49
+ 12-67
17
I'll
+ 071
- 49
- 14-03
0-60
+ O-22
- 3-24
+ 7-89
19
0-56
+ 0-16
0-21
- 14-04
*
*
- 3' 2 4
+ 7-06
20
070
+ 0-30
- 77
- H >2 3
0-30
0-08
- 1-85
+ 6-42
21
-075
+ '35
0-82
- H'Si
0-83
+ 0-45
- 3'33
+ 6-26
23
0-06
- '34
I'll
- 14-40
- o-49
4- o-ii
-2-87
4- 10-81
26
+ 0-28
- 0-68
+ 0-92
- 4-38
O'ZO
0-18
- 2 ' 2 5
+ I 6'02
27
0-16
0-24
+ 0-86
- 5-98
+ 0-40
0-78
2-1 I
+ 16-84
30
+ 0-23
0-63
+ 1-88
- 3'9
4- o-ii
- '49
- 2-84
4- 24-16
November 9
+ 0-18
0-58
- 1-05
10-15
0-05
-0-33
-4-82
+ 8-72
13
+ o-io
0-50
+ 0'2I
- 4-59
4-0-16
- 0-54
4- O-22
+ i9 - 54
See page 32.
XIL CATALOGUE OF STARS.
The following stars were selected for observation during the period of the longitude
work. The fourth column contains the tabular mean R.A. for 1888'0 found from
the Catalogues indicated in the second column (where F denotes the French ephemeris
in the Connaissance des Temps ; L., M. Loawy's Catalogue ; B.A.C., the British Association
Catalogue; and B.J., the Berliner Jahrbuch). Apparent places were calculated from
these, and compared with the observed transits corrected for Collimation and level,
to find a preliminary clock error. The mean of all the clock errors deduced from
F or L stars in each group of observations was then subtracted from the clock
errors of each individual star to find the apparent correction to ephemeris of that
CATALOGUE op STARS.
63
star ; and the mean of such corrections from all the observations of each observer is
given in the 6th, 8th, 10th, and 12th columns respectively, the numbers of observations
being given in the 7th, 9th, llth, and 13th columns. On comparison of these corrections,
no sensible systematic difference was found between the four observers ; and in the
14th column are given the adopted corrections to ephemeris, formed by combining the
results found by the different observers with weights proportional to the number of
observations. These corrections were applied to the apparent places of the ephemerides
in calculating the final clock errors.
Name of Star.
Catalogue.
Magnitude.
Tabular
Right
Ascension,
1888-0.
a|
rt
i*
g^
P
<
Correction to Epkemerides.
Bassot.
Defforges.
Turner.
Lewis.
Adopted
Means.
Corr.
w.
Corr.
W.
Corr.
W.
Corr.
w.
Corr.
w.
T Aquilse
B.A.C.
B.A.C.
F.
B.A.C.
B.A.C.
F.
F.
L.
B.A.C.
F.
L.
L.
B.A.C.
F.
L.
F.
F.
L.
L.
F.
F.
B.J.
L.
F.
L.
F.
B.J.
F.
F.
L.
F.
F.
B.A.C.
F.
B.A.C.
5'5
6
3'3
6
5
37
3'3
5
5
5
5
4
5
47
6
4-8
6
4'5
5'4
6'2
4'3
5
3'3
4
4' 3
4'3
3
4
5
2-4
3
5
6
Ji m a
19. 58. 40-07
2O. 2. 14-81
5-3I-48
7. 18-86
9- 5' 6 4
ii. 50-34
14.43-04
17. 37-69
20. 54-59
22. 28'29
23.4770
2 7 . 51-65
30. 4-28
41.49-58
44- 17-49
46.36-71
49- 47' 1 3
54- 33'48
20. 59. 38-98
21. I.52'35
! 53-93
3.29-58
4- 53-64
8. 10-07
10. 13-44
13. 0-91
16.54-38
25.39-71
33.53-10
36. 24-16
38. 41-09
40.51-42
44'53-36
47- 57-9
21. 51. 28-67
/
+ 6.58
1.0
- i. 9
+ 26. 9
+ 14- 5i
-12-53
-15. 8
+ 4-59
-18.35
18. 11
- 3-15
+ i-55
+ 14.17
- 5.26
+ 12. 8
- 9.24
+ 27-38
-17.58
-17.41
+ 3 8. 12
+ 38.12
-11.49
-f 9-4 1
+ 29.46
+ 4-47
+ 38-56
+ 19. 20
- 6. 4
17. 10
-19.23
+ 9- 22
-16. 38
+ 29-39
+ 25.24
+ 11. 33
8
+ 0'06
+ 0-04
+ 0-07
+ 0-03
O-O5
+ O'02
+ 0-03
O-07
0-05
+ O-02
O-OI
+ O'OI
+ O'OI
O'OI
o-oi
0-04
O'OO
O'OO
+ 0-11
+0-08
o-io
0-0.5
O-O2
0-04
0-03
0-06
0-04
+0-04
0-06
+ 0-06
0-O2
O'OI
0-06
I
1
I
I
2
I
3
3
3
2
3
2
4
3
4
4
2
3
5
5
3 1
5
4
4
6
4
8
6
10
6
8
7
a
s
8
+ O'06
0-05
+ 0-04
O'O3
o-oi
+0-05
+0-04
0-08
0-05
+ O'O2
+ O'O2
O'O6
0-12
+ 0-03
0-05
+0-01
O'O4
0-08
O-QO
+ 0-09
+ 0-07
0-O2
O'OI
O-O2
+ O'OI
o-oi
O'O2
o-oi
O'OI
+Q-OI
0-03
+ 0-06
0-05
0-05
0-07
I
3
4
2
4
3
4
5
3
2
6
7
5
10
ii
13
'3
4
3
ii
ii
ii
14
i5
17
20
17
3
20
2O
24
20
*4
25
27
64 Aquilce
* . .
...
0-09
+ 0-03
0-09
+ 0-01
+0-07
+0-08
0-09
2
3
i
2
2
I
2
*
...
Aquilre
20 Vulpeculas
p AquiL'c
a 2 Capricorni
j3" Capricorni
23 Hevelius
TT Capricorni
p Capricorni
69 A quite
0-08
0-08
+ 0-07
0-08
0-05
O'02
i
i
I
2
3
3
+0-05
-0-08
-0-13
+0-03
0-05
+ 0-08
-0-08
3
4
4
4
4
4
4
+ O'02
O'lO
O'O2
+ O-O2
-0-I 5
I
2
2
2
2
c Delphini
Delphini
3 Aquarii
i 5 Delphini .
jj. Aquarii
32 Vulpecute
2 1 Capricorni
6 Capricorni
6I 1 Cvffni. ..
0-18
+ O'O2
O'O2
O'OO
+ O-O2
0'05
o-oo
0-04
+0-04
0-04
+0-05
0-05
O'OI
0-05
i
2
4
4
4
4
i
5
5
3
5
3
5
5
+0-07
+ 0-06
+0-04
+ 0-01
0-06
+ O'OI
0-06
0-03
O'O2
+ 0-03
+ 0'05
O'OO
+0-07
-0-13
0-09
-O'o8
6
6
7
6
6
8
7
2
5
4
9
5
9
9
8
+ OT5
+ 0'08
+0-18
+ 0'I2
+ 07
0-09
+ O-O2
+0-05
+0-03
0-09
0-09
I
3
2
2
1
2
5
.2
3
6
3
7
6i 2 Cveni. ..
v Aquarii
y Equulei
t Cygni . .
a Equulei
(T Cvtrni...
i Pegasi
/? Aquarii
y Capricorni
K Capricorni.. .
14 Pecasi...
1 6 Pecasi . .
B.A.C. 7641
64 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
Name of Star.
Catalogue.
Magnitude.
Tabular
Right
Ascension,
1888-0.
Approximate
Declination.
Correction to Ephemerides.
Bassot.
Defforges.
Turner.
Lewis.
Adopted
Means.
Corr.
w.
Corr.
w.
Corr.
w.
Corr.
W.
Corr.
w.
1 8 Pegasi
B.A.C.
L.
F.
L.
L.
F.
L.
F.
L.
F.
B.A.C.
B.J.
F.
F.
B.J.
L.
F.
F.
B.A.C.
B.A.C.
B.J.
F.
F.
B.A.C.
L.
B.A.C.
L.
F.
L.
B.J.
F.
F.
B.J.
F.
B.AC.
6
6-5
3
4
4
4'4
6
4
6
4
6
5
3'5
3
4
4
4
3 6 4
6
3-6
2-5
'5
5
5'5
5'5
4'5
6
4-6
4'5
5
5
4'3
5
6
6
6
7
4
4-6
4'4
6
6
2-8
6
6-5
h m s
21. 54. 32'20
21. 56. 1871
22. 0. 1-79
i. 4774
4- 32-93
10.55-36
13. o-oo
15.52-27
18. 27-02
29. 35-96
3I-57-34
34- H <l6
35- 52-44
37-45-07
41. 8-19
43- 39' 6 2
46. 46-14
48. 42-46
5I-57-73
54-53-25
56. 46-1 1
58. 20-64
22. 59. IO-84
23. I. 2I-70
4.23-02
6. 4-88
8.31-24
II. 21-48
I3-35-4 8
15. 5'6l
J9-47-3I
21. I 1-46
23. 29-40
34- H'35
36. 19-88
40. 40-07
43-43-31
4 6 -47-33
49-53-99
53-33-52
56. 12-88
58. 0-05
23. 59. 36-07
o. 2.27-93
4. 16-92
7.28-03
9. 12-60
o. 10. 48-80
+ 6. II
-17-3
- 0.52
+ 24.48
+ 5-39
8. 20
-13-5*
- '-57
14. 6
o. 42
- 4-47
+ 38.28
+ 10. 15
+ 29.38
+ 22.59
14. ii
- 8. ii
16. 25
+ 20. 10.
- 0.25
+4I-43
+ 27.29
+ 14-36
+ 8.48
+ 9- n
+ 8. 7
- 6.39
+ 2-4
- 5-44
+ 23- 8
+ 22.47
+ 0.38
+ 12. 9
+ 5- i
+ I. IO
+ 2-52
+ 0.27
+ 18.30
+ 7-36
+ 6.15
- 6. 38
-17.58
6. 20
-3-4
+ 10. 31
+ '4-34
+ 8. 12
+ 7-35
i
0-05
+ 0-03
+ 0-04
+ 0-05
+ 0-03
+ O-QI
+0-05
0-06
+0-01
0-08
0-12
+ 0-03
O'O6
0-12
+ 0-01
+ 0-06
+ 0-04
+ O-O2
O-O3
0-07
0-o8
o-oi
O-O2
O'OI
0-05
+ O'02
+ 0-01
+ O'O2
O-O7
O-O3
0-06
O-05
O-O5
0-06
O'OI
O'OO
+ O-02
O-O2
o-oi
+ 0-O2
O'O2
o-oo
_O-O3
-0-17
o-oi
O-O2
o-io
7
i
7
8
9
9
4
10
IO
7
n
ii
9
6
5
5
3
4
6
3
4
6
7
4
7
8
5
5
8
4
3
9
8
9
7
8
2
7
5
5
6
7
IO
i
2
8
O-O7
+0-01
+ 0-01
o-oo
o-oo
o-oo
o-oo
0-07
+ O-O2
+0-03
0-07
-0-08
+ 0-02
0-04
0-08
+0-03
+ 0-06
+0-05
+ 0-01
o-oi
-0-08
0-04
+ O'O2
O-O2
0-05
+0-03
+0-03
+0-04
0-04
O'OO
0-06
0-03
+ 0-01
0-03
0-04
o-oi
+0-03
o-oi
o-oi
O'OO
+0-03
+ 0-O2
O'O2
-0-13
0-04
+ 0-01
O'll
5
3
4
5
4
3
2
4
2
3
5
4
8
IO
IO
7
5
7
7
5
2
7
8
6
4
5
8
9
5
10
ii
IO
6
IO
ii
10
8
9
9
9
7
8
7
9
5
5
1
O'OI
O-O2
+ 0-05
O'OO
+ 0-01
O'OI
+ O'O2
O'O6
o-oo
+ 0-05
O-O3
-0-13
+ 0-07
O'I2
o-i i
+ 0-06
+ O-I2
+ 0-07
0-03
+ 0'I2
-0-17
0-05
o-oi
O-O2
0-03
0-04
+ 0-05
+ 0'06
+ 0-03
O-03
0-09
0'12
O-O7
0-03
0-O5
o-oo
o-oo
+ 0-O2
0-08
O'OO
+Q-OI
+0-04
+ O-O2
+ O'OI
-0-18
0-04
0-06
O-I 2
8
2
6
9
6
7
7
5
2
4
4
6
9
9
9
8
10
6
7
4
6
7
5
7
7
5
8
6
7
7
8
6
3
5
8
8
IO
5
6
5
7
6
10
ii
6
4
I
-0-18
O'OO
+ 0-06
+ 0-03
+ 0-01
0-04
+ 0-01
0-03
+ 0-03
0-14
o-oo
-0-17
+ 0-1 1
+0-03
0-16
+ O-02
+ 0-09
+ 0-08
O'OI
0-07
+ 0-01
0-05
+0-04
0-05
0-07
0-07
o-oi
O'OO
0-04
-0-08
0-05
0-09
0-03
o-io
o-oo
O-O2
O'O2
^o-o i
0-03
O-O2
+ 0-O6
O'O2
O-O5
0-05
O-I4
+ O'O2
O-O3
0-07
5
4
6
6
6
9
5
8
i
4
6
7
IO
ii
9
9
10
9
8
5
4
7
4
9
9
8
9
n
7
8
9
8
7
2
5
8
n
ii
7
1 1
6
6
6
7
8
8
6
3
s
0-07
o-oo
+ 0-04
+ O'O2
+ O-O2
o-oi
+ O-02
O-05
+ 0-01
o-oi
0-05
-0-13
+ 0-06
0-04
0'12
+ 0-03
+ 0-09
+ O-O6
o-oi
o-oo
-0-08
0-05
+ 0-01
0'02
0-04
0-05
+ 0-02
+ 0-02
+ 0-01
O'O6
0-04
0-08
0-04
0-04
0-04
0-02
O'OI
+0-01
0-03
o-oi
+ 0-02
+ 0-01
o-oo
O-O2
o-i 6
O'O2
0-03
O'lO
25
IO
23
28
25
28
18
27
5
21
22
28
38
39
35
3
30
27
25
18
18
24
13
30
29
21
2 9
32
27
25
34
3i
26
19
24
35
37
39
22
32
26
25
25
2 7
32
38
18
'4
i Peeasi . .
6 Pegasi
4 5 Aquarii
y Aquarii
r) Aquarii
K Aquarii
i o LacertflB
n Pesasi
X Pegasi
r 2 Aquarii
? i Peeasi . . .
3 Piscium
o Andromedse
fii Peaasi.
a Peeasi . .
r c Peeasi
58 Pegasi
tf> Aquarii
96 Aquarii
T Peeasi
70 Peeasi ..
1 9 Piscium ...
L.
L.
L.
B.A.C
F..
F.
F.
L.
L.
B.A.C
F.
L.
B.A.C
2 1 Piscium
<f> Pe^asi
B.A C 8315.
o> Piscium
30 Piscium
2 Ceti
3 3 Piscium
5 Ceti
34 Piscium
y Pecasi
35 Piscium
36 Piscium
CATALOGUE OF STARS.
65
Name of Star,
Catalogue,
Magnitude.
Tabular
Right
Ascension,
1888-0.
Approximate
Declination.
Correction to Ephemerides.
Bassot.
Defforgcs. Turner.
Lewis.
Adopted
Means.
Corr.
W.
Corr. W.
Corr.
W.
Corr.
W.
Corr.
W.
42 Piscium
L.
L.
L.
F.
L.
F.
B.J.
B.J.
F.
B.J.
F.
L.
B.J.
F.
L.
L.
L.
L.
B.A.C.
T
B.J.
B.J.
F.
L.
L.
L.
F.
F.
L.
L.
B.J.
F.
B.A.C.
L.
L.
B.J.
L.
L.
F.
F.
L.
F.
L.
L.
F.
B.J.
L.
F.
6
6-5
6
6
6
5'5
4
3'3
2 '2
4
5
5
4
4
6
3'5
6
5
5'5
6
4
3
4
67
6
6
4-6
4'5
6-5
6
3-6
3
5'5
6-5
6
6
5 5 6
Var.
5'5
4'5
? 5
6'5
5'9
5-6
4
3-6
h m s
o. 1 6. 37-71
1 8. 46-12
20. 52-68
24. 19-29
26. 36-98
29. 28-88
3- 53-9;
33-2-39
37- 57-95
41. 24-11
42.52-24
47- 16-94
5-3 2 '33
o. 57. 7-84
i. o. 1-45
2.57-26
4.47-69
7- 39'9
S-45'43
12. 1-22
13. 18-64
I8.25-52
25-29-33
29.47-04
31. 9-61
33- 38-20
35- 36-07
39.28-75
. 4 2 - 37-97
44.55-32
46.41-87
48. 27-09
51.41-30
54- i9'5
i. 57.26-98
2. 2. 52-8l
4- 2 5-o4
6. 56-69
11.23-74
i3-4 r 33
18.48-74
22. 12-lS
24.41-60
26. 46-04
29. 56-26
32.27-40
33-44-43
2.37.2979
+ 12. 52
- 2.50
o. 40
- 4-35
-f 6. 20
-4-13
+ 33- 6
+ 30- 15
-18.36
+ 23-39
+ 6. 58
- i-45
+ 37-54
+ 7- 17
+ 4- 19
-10.47
+ i. 5'
+ 23-59
- 8.32
+ 3- 2
+ 25.40
- 8-45
+ 14.46
+ 14. 6
+ n. 34
+ I5-50
+ 4-55
+ 8.36
+ 3-7
+ ic. 39
+ 29. 2
+ 20. I 6
+ 23- 3
+ 2.34
- 0.2;
+ 34-27
+ 18. 58
+ H-45
- 6. 56
- 3.29
+ 10. 6
+ 7-57
+ 17- 12
+ 14-33
+ 6.21
+ 21. 28
- o. 9
+ 2.46
8
+ O-O2
+ 0-II
o-oo
+ 0'OI
+ 0-01
+ 0-03
-0-15
0-16
+ 0-05
o-io
0-06
+ 0'O2
-0-28
O'll
+0-03
+0-03
-0-03
+0-06
+ 0-01
O-O2
-0-15
O'OI
O-O2
o-oi
o-oi
+ 0-01
0-06
o-io
+ 0-04
0-09
+0-04
0-08
+ O-I2
0-09
O'OI
+ 0'O2
+ O'I2
+ 0-01
+ 0-04
+ 0-03
2
3
8
10
9
10
2
9
8
8
8
10
7
o
13
Q
"
6
6
7
6
6
8
6
2
2
4
4
4
i
i
i
i
i
i
i
i
s
O'OI
+ 0'I2
o-oi
+ 0'02
0-03
o-oo
O-04
-0-14
+ O-QI
0-08
0-03
+ 0-01
0-23
0-07
+0-07
+0-01
o-oo
+ Q-IO
+0-03
o-oi
0-12
O-02
+ 0-04
O'OO
+ 0-02
O'02
+ 0-03
0-04
-0-15
+ 0-04
0-03
+ O-O2
o-io
o-oi
O-O2
0-I3
+ 0-05
+ 0-03
o-oi
0-16
+ 0-01
+ 0'O2
0-05
0-03
+0-03
5
4
6
3
6
6
2
8
'8
10
10
8
9
7
7
9
9
2
9
5
i
6
8
6
3
4
i
2
I
3
3
i
i
2
2
3
2
2
2
2
I
I
I
s
s
s
o-oo
+ 0-12
o-oo
o-oo
O-02
+ 0-3
0-14
O-lg
+ 0-03
O-Og
O-O2
+ 0'02
O-32
O-Og
+ O'O2
+ 0-01
O'02
+ 0-O6
+ O-O2
O'02
-0-13
O-O2
+ O'O2
O'OI
o-oo
0-02
+ 0-05
O-O4
0-09
+ 0-05
O'I4
+ 0'02
o-io
0*04
O-O4
O-07
-f-O'02
+o - o6
4-0-04
O'll
+ 0-03
+0-03
0-06
+0-03
0-04
o'i6
0-05
0-03
7
7
'5
20
28
3
15
34
26
34
2 9
32
28
'9
22
35
32
34
IS
25
21
I
22
26
25
22
23
15
9
9
12
H
10
3
4
4
3
4
4
5
5
5
3
4
2
2
3
2
B.A.C. 81
10 Ceti
+ 0-07
0-05
0'O2
+ 0-04
O'22
O-26
+ 0-01
O'lO
0-03
+ O'02
-0-45
o-oo
0-05
o-oi
O-O2
+O-QI
+0-04
O'OI
-0-13
I
5
7
8
6
10
6
5
7
8
i
4
8
7
8
6
6
5
+0-08
0-04
+0-07
0-07
0-19
+0-03
0-07
+0-07
+ 0-03
-o-33
0-18
o-oi
O-O2
0-04
+ O'O6
o-oi
0-06
o-io
2
6
6
5
7
5
10
6
8
5
i
4
7
7
5
5
4
5
1 2 Ceti
5 1 Piscium
13 Ceti
TT AndromediB
8 Andromedfe
ySCeti
Androinedii) . .
8 Piscium
20 Ceti
w Andromedcje
e Piscium
77 1 Piscium
f] Ceti
H Ceti
<f> Piscium
17 Ceti ..
f Piscium
v Piscium
0Ceti
+ 0-O2
o-oo
o-oi
0-O2
+ 0-07
O'OI
0-09
+0-06
O'2I
+0-01
-0-14
o-oo
0-05
o-oi
0-08
+0-04
+0-04
+0-03
+0-05
7
8
9
7
9
4
4
J
5
3
i
i
i
+ 0-10
O'O2
+0-04
0-05
+ 0-12
O'O2
O'l I
+ 0-06
o-oi
+0-01
o-io
0-05
+ 0-01
0-04
+0-13
+0-06
0-08
+0-09
+ 0-06
-0-15
0-O2
o-i i
-0-32
-0-15
0-08
2
4
3
2
3
i
2
I
I
2
I
2
I
I
I
I
I
I
I
I
I
I
I
I
I
I o i Piscium
TT Piscium
105 Piscium
v Piscium
o Piscium
B.A.C. 551
54 Ceti
a Trianguli
/? Arietis
A. Anetis
112 Piscium
60 Ceti
13 Trianguli
1 5 Arietis
1 9 Arietis
67 Ceti
o Ceti
Arietis
2 Ceti
27 Arietis
29 Arietis
Piazzi II. 123
v Arietis
8 Ceti
0-04
I
...
y 2 Ceti
GREENWICH OBSERVATIONS, 1899.
66 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
Name of Star.
Catalogue.
Magnitude.
Tabular
Right
Ascension,
1888-0.
I
Approximate
Declination.
Correction to Ephemerides.
Bassot.
Defforges.
Turner.
Lewis.
Adopted
Means.
Corr.
w.
Con.
w.
Corr.
W.
Corr.
W.
Corr.
W.
u. Ceti..
L.
B.A.C.
F.
L.
L.
P.
F.
B.A.C.
F.
F.
L.
L.
F.
L.
F.
4
4
37
6
3
4-6
2-6
4
3
2-3
4'S
4
4
4'5
37
h m s
2.38. 53-14
41. 14-26
43-23'42
45- i 8 -53
50. 57-32
52.48-46
56.25-44
2. 58. O'OO
3-' 0.52-87
5- J 3-4-8
8. 27-80
18.47-11
21. 5-92
24.41-34
3.27.39-27
/
+ 9-38
+ 28.47
+ 26.48
+ H-37
9. 21
+ 20. 53
+ 3-39
+ 38-24
+ 4- 3i
+ 19.18
+ 20.37
+ 8.38
+ 9.20
+ 12.33
- 9- 5
s
+ 0-08
+ 0-07
O'OI
0-08
+0-04
+ 0-01
+0-07
0-07
0-04
O'OO
O'OI
0-04
+ 0-01
I
I
I
I
2
2
2
2
2
2
2
2
I
s
+ 0-19
+ 0'01
o-oi
-0-17
0-04
+0-06
+ 0-04
+0-03
+ 0-03
+0-05
+ 0-06
O'OO
O'lO
2
2
I
S
+ 0-16
+ O-2O
0-04
O-OJ
0-03
+ O'O2
+ 0'O6
O'lO
0-05
O-o6
0-02
I
I
I
2
I
2
2
:
i
i
s
+ 0-16
0'02
+ 0-03
+ 0-09
+ 0-09
+ 0-10
0-03
0-02
o-io
O-O7
2
2
s
+ 0-12
+ 0-18
o-oo
0-02
+ O-02
0-03
+ 0-04
O-O3
+ 0'OI
0-05
0-03
+ O'02
+ 0-01
O'O2
^0-05
2
5
6
4
3
I
6
6
5
5
3
3
4
2
39 Arietis
41 Arietis
<r Arietis
TI Eridani
e Arietis . ..
a Ceti
p Persei
/JPersei
8 Arietis
Arietis
o Tauri
Tauri
/Tauri
+ O'O2
i
e Eridani
XIII. CLOCK ERROR
The Clock Error was determined from observation of the stars given in the preced-
ing section. The following table contains the times of transit of these stars and of the
circumpolar stars used to determine the Azimuth Error. Column 1 contains the star's
name ; column 2, the position of the micrometer head, whether East or West. Column
3 gives the number of wires over which the transit was observed, or, in the case of
circumpolar stars, the number of bisections made, as explained on p. 25. Column 4
gives the jeading at which the R.A. micrometer was set during the evening for observa-
tions of clock stars, and the mean of the micrometer-readings at which bisections were
made for the polar stars. The occasions when a polar star was bisected by a wire other
than the middle, or when it was observed without moving the R.A. micrometer (see
p. 24), are mentioned in the notes, the wires being numbered as on p. 10. Column 5
gives, in all cases, the time of transit over the middle wire, set at the reading of the
RA. micrometer adopted for the day, corrected for parallax of pens. Column 6 gives
the transit corrected for Collimation, Level, and Azimuth Error (p. 62). Column 7
contains the Tabular Apparent R.A. of the stars taken from the ephemerides before
mentioned, corrected by application of the corrections given on p. 63. Column 8
shows the difference of columns 6 and 7, which is the Clock Error indicated by the
individual stars. Column 9 is the Clock Error at O h local Sidereal time on each day
obtained from each star. The corresponding Clock Errors deduced from polar stars are
given in column 8 as a check in the accuracy of the reduction, but are not given in
column 9, as they are, of course, not used in determining final Clock Error.
STAR-TRANSITS OBSERVED AT PARIS
AND
RESULTING CLOCK ERRORS.
Star's Name.
Position.
No. of Wires. 1
R.A.
Micrometer. 1
Observed
Transit.
Corrected 1
Transit.
Tabular
Apparent 1
B.A.
Clock
Apparently
Slow.
Clock
Apparently
Slow at o h
Sidereal.
Star's Name.
B
I
No. of Wires. 1
E.A.
Micrometer.
Observed
Transit.
Corrected 1
Transit.
Tabular
Apparent
R.A.
III
O P,M
S
Clock
Apparently
Slow at o h
Sidereal.
A. Urs<e Minoris
W
W
w
w
\v
w
w
w
w
w
w
w
w
w
E
E
E
E
E
E
E
E
E
E
E
E
E
E
W
W
W
W
W
W
W
W
W
W
W
w
E
E
E
E
E
10
IO
9
9
9
9
5
9
7
9
6
9
9
4
4
4
I
9
9
9
9
9
9
6
9
9
5
9
9
7
9
9
9
9
7
9
9
9
6
6
3
9
9
2
r
10-204
10-846
10-130
II 201
10 130
i o ' 1 40
J
1
9-888
10-733
10-140
18
h m s
19-35- 5-32
19. 44. 50-17
19. 58. 32-74
20. 2. 7 "64
20. 5. 24-48
20. 7. 11-32
20. 8. 58-39
2O. II. 43'6o
20. 14. 36-35
20. 17. 30-55
20. 23. 40-96
20. 27. 44-58
2O. 29. 57'II
20. 33. 43-25
20. 33. 44-14
20. 35. 4-90
20. 41. 42-66
2O. 44. 10-42
2O. 46. 29-87
20. 49. 39-70
21. I.45-37
21. i. 47-01
21. 3. 22-88
21. 4. 46-63
21. 8. 2-88
21. 10. 6-54
21. 12. 53-95
21. 21.47-55
21. 47. 50-88
21. 51. 2I'8o
21. 54. 25-57
]
21. I. 46-95
21. 1.48-48
21. 3.24-11
21. 4. 48-00
21. 8. 4-25
21. IO. 7-90
21. 12. 55'08
21. 16. 48-74
21. 21. 49'II
21. 21. 47-58
21. 38. 35-62
21.44. 47-56
21. 47. 52-32
21. 51. 23-16
88 S
s
25-82
28-00
31-80
6-64
23-48
10-53
57-51
42-51
35-24
29-60
39-95
43-67
56-22
44-75
45-92
6-67
41-68
9-56
.28-86
38-98
44-76
46-40
21-84
45-76
2-18
5-63
53-35
53-76
50-08
20-90
24-62
888
46-68
48-21
23-52
47 '54
3-92
7-41
54-82
48;33
53-12
47'S 1
52-04
2278
epter
40-59
3778
41-86
16-56
33-34
20-52
7-38
52-33
45-04
39-45
49-63
53-46
6'O2
55-52
55-52
17-30
51-61
19-38
38-78
49-05
54-78
56-35
31-70
55-69
12-14
15-55
3-07
2-94
0-15
30-87
34-41
Octo
5476
56-33
31-69
55-68
12-13
I5-54
3;o5
2 '60
2 '60
43-27
55-61
60-13
30-86
aber 3(
1477
9-78
10-06
9-92
9-86
9-99
9-87
9-82
9-80
9-8S
9-70
979
9-80
1077
9-60
10-63
9-93
9-82
9-92
10-07
10-02
9^5
9-86
9-93
9'96
9-92
97 2
9-18
IO-O7
9 "97
979
jer 1.
8-08
8-12
8-17
8-14
8-21
8-13
8-23
8-12
9-20
9-48
8-04
8-30
8-09
8-08
). Ob
s
9-72
9-58
9-53
9-66
9-54
9-50
9-48
9-54
9-40
9-49
9-50
9-65
9'54
9-65
9-80
976
9-69
9 61
9-68
9-72
968
9 '49
9-88
979
9-61
Obse
778
7-82
7-87
7-85
7-92
7-85
7-95
7-85
7 : 8o
8-08
7-87
7-86
server H T. Trans
it
w
w
w
E
B
E
K
E
B
B
W
W
\v
w
w
\v
w
\v
\v
v>
w
E
E
E
E
E
E
R
E
E
E
B
E
E
E
E
E
E
E
E
E
B.
9
9
IO
9
9
9
9
9
9
9
9
IO
IO
9
9
9
9
6
9
9
9
9
10
IO
9
9
9
9
9
9
9
9
5
9
6
9
9
7
9
9
7
7
IO
r
10-130
9-406
10-130
i
10-162
10-234
10-130
11
10-005
n
10-863
11-113
11-130
D
10-140
10-013
h m s
21. 59- SS'34
22. I. 41-00
22. 22. 8-08
22. 34. 7-69
22. 37. 38-46
22. 43- 33'S 1
23- 46. 39-89
o. 4. io'6i
o. 7. 21-86
o. 9. 6-45
o. 13. 38-59
o. 13-31-24
o. 26. 31-17
o. 29. 23-10
o. 47- 1 1 '23
o. 50. 26-51
0.53.43-68
7- 34-23
. 8.39-71
11-55-32
. 13. 12-82
1.8. 39'9i
18. 35-58
25. 23-15
. 29. 40-91
.31- 3-6i
33- 3 2 ''3
35- 29-96
22.35.47-28
22. 36. 39-76
22.41. 3-05
22. 46. 41-21
22. 51. 52-62
22. 54. 48-33
22. 56. 40-98
22. 58. 15-46
22. 59. 5-76
23. 1. 16-58
23. 4. I7-88
23- 5- 59^3
23. 8. 26-27
23. 28. 0-75
s
54-34
40-20
I2'IO
7-08
45-09
37-76
32H6
38-88
974
21-03
21-96
17-11
30-22
22-08
10-23
25-84
4778
33'42
38-65
54-35
12-03
56-16
22-32
40-14
275
31-30
29-05
46-90
39-51
275
40-72
52-30
47-88
40-84
15-19
16-19
2578
6-61
8
4-I3
50-I4
21 "30
1674
47-62
42-10
48-67
I9-39
30-68
30-26
30-26
3I-48
I9-52
35]3i
42-82
4 378
21-42
59-I5
59-I5
32-05
4971
12-26
40-89
38-70
54 '93
47-61
10-60
48-67
0-27
557
4 S- 9 2
23-25
13-38
24-17
25-48
7-33
3374
14-46
s
9-79
9-94
9-20
9-66
9-84
9-86
9-64
9-79
9-65
9-65
9-63
8-30
13-15
9-36
9-40
9-29
9'47
8-50
9-40
9-32
9'43
9'39
2-99
973
9'57
9-51
9'59
9-65
8-03
8-10
7-85
7'95
7-82
8-08
8-06
7'97
7-98
7-99
8-10
7-96
7-85
s
9-62
977
9 '54
972
974
9-68
9-66
9-66
9-64
9-40
9-44
936
9'55
9'49
9-4I
9-53
9'49
9-85
9-70
9-64
9-73
9-79
7-96
772
7-85
771
7-98
7-87
7-88
7-90
8-01
7-88
Groombridge 1119 S.P
T Aquihe
Bradley 2003...
64 Aquilfe
( Pe {> asi
p Aquilre
TT Peffasi.
$ 2 Capricorni
X Aquarii
B.A.C. 7014
34 Piscium
e Delphini
35 Piscium
^ Delphnii
Bradley 1672 S.P
Bradley 2701
Bradley 1672 S.P
Bradley 2701
51 Piscium
13 Cti
20 Ceti
15 Delphini
H Andromeda?
2 Ursa? Minoris
6I 1 Cygni .
37 Ceti
v Aquarii
v Pisciuni
y Equulei
Polaris
Cygni
Polaris
a Equulei
0- CvTii
T] Piscium
101 Piscium
1 6 Pegasi
TT Piscium
105 Piscium
BAG 7641
18 Pegasi
ever H T. Transit .
f Pesrasi
6I 1 Cygni
6i 3 Cygni
rj Pegasi
A. Pegasi
7 Equulei
A. Aquarii
i Pe^asi
e Pegasi
CQ Pe^asi ..
14 Pegasi
Aquarii
1 6 Pegasi
Bradley 3147
B A.C. 7641
September 30. A Ursie Minoris W was observed on wire VII. Bradley 2701 E and 75 Draconis E were observed without moving the micrometer. Bradley 1672 S.P. W was
observed on wire II. . r
October i. Groombridge 3548 W was observed on wire IV. Groombridge 3548 E was observed on wire III. Bradley 3147 E was observed on wire
68
TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
1 i ~
.
, . J>
S
M
*J
~""^ i
E
S
"5 J 1 *- a
3
J-Q^
Stains Name.
1
"o
-< g Observed
p$ g Transit.
'2
E
* 3 .
|S5
^5 ^
111
IHI
Star's Name.
.2
'3
P
"o
. CJ
31
Observed
Transit.
+3 '33
y S
||
1|S
3>
335
5SG3
lf|l
CM
6
X
S i
,- '~
P
S
<"x x
PH
Zl
i
O
S 3
B
^
|P
75 Draconis
3 Aquarii
15 Delpbini
H Aquarii
32 Vulpecula?
61' Cygni
6i 2 Cygni
v Aquarii
y Equulei
C Cygni
a Equulei
o- Cygni
I Pegasi
Groombriilge 3548 .
Groombridge 3548 K
e Pegasi....
14 Pegasi..
1 Pegasi..
T Pegasi . . .
v Pegasi ...
K Piscium .
70 Pegasi..
Groombridge 3548 .
Groombridge 3548 .
( Pegasi
14 Pegasi
B.A.C. 7641. .
18 Pegasi
o Aquarii
5 Pegasi
6 Aquarii .,
10-150
10-247
10-197
10-150
W
Q
Delphini
W
Bradley 2701..
\\
Q
W
Q
3 Aquarii
W
9
W
c
32 Vulpeculffi
W
W
6i 2 Cygni...
W
Q
v Aquarii
W
Q
y Equulei
\\
C Cvffni
W
W
a 1 Cygni
W
C
i Pefasi
W
Groombrid^e 3548. . ..
W
IO
F
IO
t Pegasi
F,
1 4 Pegasi
K
1 6 Peeasi .
F
Q
BAG 7641
F
7
1 8 Pegasi
K
q
6 AqUiirii
F,
45 Aquarii
F,
Q
Bradley 2993 .(E. & E.)
E
F
4
58 Pegasi
K
CQ Peeasi
F,
7
F,
v Piscium ...
K
Q
lo-iSo
9776
10-043
io'i8o
8-180
10-180
7 10-441
8-080
10-180
1888 October 3. Observe]- II T. Transit II.
h in s
s
s
2O. 35. 10-85
12-17
16-88
20.41.47-48
46-84
SI'S?
2O. 44. 15-02
14-49
I9-34
20. 46. 34'66
33-99
3874
20. 49. 44 '68
44-26
49-00
21. i. 50-36
50-02
5472
21. I. 51-90
51-56 i 56-29
21. 3.27-54
26-85 '31-66
21. 4. 51 "55
51-01
55-65
21. 8. 7-73
7-32
12-09
21. 10. If3I
10-73 15-51
21. 12. 58-59
58-26 3-01
21. 16. 52-19
51-71
56-43
21. 21. 55-08
59-39
1-96
21.21. 53-30
59-80
1-96
21. 38. 39-11
38-69
43-23
21. 44. 51-21
50-96
55-58
22. 58. 19-07
1 8 'So . 23-23
23. 15. 4-32
4-01 8-20
23. 19. 45-87
45-56 49-94
23. 21. 9-82
935 I3-89
23. 23. 27-83
27-43 : 31-92
471
473
4-85
475
4-74
4-70
473
4-81
4-64
477
478
4-75
472
2-57
2-16
4'54
4-62
4^3
4-19
4-38
4-54
4'49
4-40
4-53
4'43
4'43
4-40
4'43
4'49
4'5
4H7
4H5
4'3
4-39
4'33
4-11
4'3I
4'47
4'43
Bradley 3147
F,
10
Bradley 3 147
W
IO
5 Ceti
W
Q
34 Piscium
W
9
y Pegasi
W
9
35 Piscium
W
q
36 Piscium
W
Bradley 1672 S. P. ...
\v
IO
Bradley 1672 S.P
F,
IO
12 Ceti
F,
4
51 Piscium
F,
9
13 Ceti
K
g
S Andromeda?
F,
9
F,
6
5 I'iscium
F,
9
2 ITl'Sie MillOl'is
F
12
77 Piscium . .
K
r] Ceti
F,
7
33 Ceti
F,
9
Polaris . .
F,
IO
Polaris...
W
10
9-328
10-150
11-290
10-784
10-150
9-150
8-319
8-021
1888 October 5. Observer H T. Transit B.
20. 27.
52-36
51-76
53-38
2O. 30.
4-86
4-28
5^4
20. 33.
51-11
53-44
54-85
20. 35.
12-86
15-17
1663
20. 41.
50-64
49-90
5I-54
20. 46.
38-01
37-24
3871
20. 49.
47-76 1 47-32 48-97
21. I.
53-45
53-13
54-69
21. I.
55-07
54-75
56-26
21. 3.
30-88
30-09
31-64
21. 4.
54-69
54-08
55-62
21. 8.
II -OO
10-58
1 2 '06
21. IO.
14-61
13-96
I5- 4 S
21. 13.
I -80
1-49
2-98
21. 16.
55-40
54-87
56-40
21. 21.
56-07
63-34
6I-36
21. 21.
50-97
57-41
61-36
21. 38.
42-45
4178
43-22
21. 44.
54-56
54-08
21. 47.
59-29
58-76
0-08
21. 51.
30-12
29-47
30-81
21. 54.
33-64
32-95
34-35
22. IO.
57-11
56-30
57-67
22. 13.
176
0-90 1 2-36
22. 22.
14-91
19-70
20-39
23- I.
23-58
2291
24-15
23- 4-
24-93
24-26
25-46
23. 6.
6-90
6-22
7-31
23. S.
33-31
32-51
33-72
23. ii.
23-50
2278
24-02
1-62
1-66
1-41
1-46
1-64
1-47
i-65
1-56
1-51
i '55
i-54
1-48
1-52
1-49
+I-53
1-98
+3-95
1-44
i '47
1-32
i'34
1-40
1-37
1-46
0-69
1-24
I'20
I-2 4
I'll
1-16
1-16
i -oo
1-19
1-13
i -08
1-13
I-I2
1-07
I'll
I-0 9
I-I4
I -10
1-14
I -00
1-03
I'lO
no
i -20
1-09
1-07
0-96
1-09
96 Aquarii.
T Pegasi ...
Bradley 3147 VI
i Piscium W
\ Piscium AY
19 Piscium W
21 Piscium I W
<j> Pegasi
B.A.C. 8315
01 Piscium
30 Piscium | W
3-5 Piscium ; W
5 Ceti
34 Piscium j W
y Pegasi AY
35 Piscium [ W
Bradley 1672 S.P W
Bradley 1672 S.P
TJ Ceti .-...
33 Ceti
f Piscium
i) Piscium
101 Piscium
IT Piscium
105 Piscium
v Piscium
o Piscium
B.A.C. 551
54 Ceti
1888 October 11. Observer L. Transit B.
21. 22. 1-43
2-72
9-8 4
I I '00
21. 22.
21. 38.
21-45- '5'74J "5-34
21. 51. 41-25 | 40-65
21. 54. 44-80 44-14
22. O. 14-66 13-93
22. 4. 45-74 45-08
22. II. 8-40 7-60
59-42
43-14
55^6
30-75
34-29
4-03
35-I6
57-6I
10-42
11-58
- 9-78
9-88
9-90
- 9^5
9-90
9 92
9-99
IO-O2
lO'II
IO'I2
10-06
lO'IO
lO'II
10-17
45 Aquarii
y Aquarii
Jiradley 2993.
Bradley 2993.
IO Lacertir
ij Pegasi
Bradley 3147.
1 9 Piscium
21 Piscium...,
h m s
s
.s
=3-28. 3-54
10-29
14-16
83. 28. 6-1 1
10 -60
14-16
O. 2. 26-72
26-09
30-46
o. 4- 15-53 I4-99
1939
o. 7. 26-89 ' 26-38
3069
o. 9. 1 1 -37
lO'bl
I5'2O
o. 10. 47-44
46-88
5 '"32
o. 13- 37^5
27-51
30-70
o. 13. 38-08
23-29
30-70
o. 24. 17-98
17-47
21-86
o. 26. 35-70
35-26
39-59
o. 29. 27-72
27-22
31 -50
o. 33. 19-15
18-90
23-18
o. 41. 22-90
22-59
26-87
o. 42. 50-97
54-86
o. 53-45-24
50-24
56-30
i. o. 0-28
59-84
4-09
I. 2. 56-16
I. 4. 46-46
55-61
46-00
59-82
50-27
i. 1 8. 35-80
53-96
59-54
i. 18. 45-22
57-54
59'54
E
9 10-180
E
9 ,,
W
:o 10-751
W
6 10-180
W
9
W
9i ,,
W
9 ,.
W
9 ..
W
9
W
9
W
9
W
9
W
9
W
9
W
9
\Y
9
w
10 ' 10-094
K
10 9-896
B
4 io'i8o
E
7
i-;
9
E
9
E
9
E
9
E
9 ,,
E
9
E
9
E
9
E
9
23- 13- 37-56
23. 15. 7-46
23. 28. 4-48
2 3- 34- ij'5'
23. 36. 22-07
23.40.42-37
23.43-45'54
23. 46. 49-46
23. 49. 56-02
23- 53- 35
23. 56. 15-17
23- 59- 38-35
O. 2. 30*22
o. 4. 18-85
o. 7. 30-12
o. 9. 14-77
o. 13.47-99
0. 13
1. 2
4
i->
-I
99
31
33
i- 35-
I- 39-
i. 42.
1.44.
46-50
59-67
49-93
3'53
3 I- 99
49 67
12-10
40-67
38;56
40-34
57-88
10-180
)>
9-447
14-147
10'iSo
",
12-569
lO'iSo
22. 13. 12-92
22. 16. 5-16
22. 22. 23-10
22. 22. 22-93
22. 34. 26-73
22.37.57-88
23. 28. 14-70
23-40.53-43
23. 43. 56-82
6-91
12-04
I2-S6
21-38
41-60
44-85
48-92
55-39
35-24
14-42
37-61
29-50
18-25
29-55
14-14
31-22
58-84
49-20
2-81
31-37
49-04
11-45
40-06
37-86
3"57
39-62
1 2 '06
4-42
29-31
29-24
26-46
57H9
23^5
5275
56-IO
37-97
8-19
I3-92
13-88
22-36
42-60
45^5
50-02
'5 '45
38-62
30-47
19-40
30-70
15-21
30-87
30-87
59-83
50-29
3-82
32-11
49-77
12-32
40-95
38-76
3 1- 39
40-49
58-05
2-30
54-48
19-31
16-61
42-58
45-83
3-87
3-56
4-37
4-40
4-3I
4'39
4'44
3''9
4'39
4-33
4-28
4-28
4-28
4-32
6 -02
4-25
4-21
4-27
5-58
I -2O
1-28
1-88
i -02
0-98
I'OO
I'OO
no
1-16
0-87
1-03
i -oi
0-97
1-15
1-15
+ 107
0-16
-0-35
+0-99
1-09
I'OI
0-74
073
0-87
0-89
0-90
0-82
0-87
0-82
9-76
9-94
10-00
- 9-93
- 9-85
- 9-97
10-28
10-17
10-27
October 3. 75 Draconis W was observed without moving the micrometer. Groombridge 3548 E was observed on wire I. Bradley 3147 W was observed on wire VI. Bradley
1672 S.P. E was observed on wire VI. 2 Ursa> Minoris was observed on wires II., III., IV. set at micrometer-readings 6 r -i5o, 9 r 'i5o, ii r 'i5o, I4 r -i5o. Polaris W was
observed on wire VIII.
October 5. Bradley 2701 W and 75 Draconis W were observed without moving the micrometer. Groombridge 3548 W was observed on wire III. Groombridge 3548 E was
observed on wire III. Bradley 1672 S.P. E was observed on wire VII.
October II. Groombridge 3548 W was observed on wire IX.
STAR-TRANSITS OBSERVED AT PARIS AND RESULTING CLOCK ERRORS.
6J)
Star's Name.
s
. 03
< =
Observed
Transit.
II
li
Star's Name.
Observed
Transit.
Sg .
is:
o a*''
5
<f> Pegasi
B.A.C. 8315
01 Piscium
30 Pisi'ium
2 Ceti
5 Ceti
Bradley 1672 S.P.
Bradley 1672 S.P.
51 Pisiium
13 Ceti
Ceti
Andromeda?
5 Piscium
W
fC'ygni...
a Equulei
a Cygni
I Pegasi
Groombridge 3548 .
K Capricorni
Aquarii
45 Aquarii
7 Aquarii
i) Aquarii
10 Laccrtiv
( Pegasi
7 Piscium
96 Aquarii
r Pegasi
v Pegasi
K Piscium
70 Pegasi
Bradley 3147
Bradley 3147
14 1'egasi
16 Pegasi
B.A.C. 7641 ..
29 Aquarii
a Aquarii
t Pegasi
e Pegasi
Bradley 2993.
Pegasi
r; Pegasi
\ Pegasi
T" Aquarii
A Aquarii
S Aquarii
3 Piscium
55 P e g asi
58 Pegasi
59 Pegasi
<(> Aquarii
7 Piscium
96 Aquarii
Groombridge 3548 .
7 Capricorni
K Capricorni
e Pegasi
J Capricorni
14 Pegasi
1888 October 11. Observer L. Transit B. continued.
E 10
AV 10
9 10-180
9
9
9
9
7
12-331
13-095
10-180
23- 47- 079
23- 5- 7 '32
23- 53- 46-98
23. 56. 26-43
23. 58- i37i
o. 2.41-55
0-26
6-69
25-65
I2-82
4O-8O
50-00 !
o. 13. 58-86 39-59
36-11
i5'44
2'6l
30-46
31-45
9 ' lO'iSo
o. 14. i -60 42-60 31-45
o. 26. 50-54
o. 29. 42-40
o. 38. 11-64
o. 4i- 37'53
o. 43. 5-62
39-62
IO'26
10-14
:O'22
-IO-2I
-io '34
- 8-14
-11-15
-I0'2
-10-13
-10-16
-10-16
-10-07
-10-28
-10-15
-10-23
-IO'22
-IO-2I
-10-34
49-88
41-65 j 31-52
1073 | 0-57
37-06 26-90
4-97 54-90 ,
1888 October 13. Observer L. Transit B.
-10-22
-10-08
-IOTO
-lO'IO
-lO'OO
20 Ceti
2 Ursa? Minoris.
Polaris.
Polaris.
101 Piscium .
v Piscium
o Piscium
B.A.C. 551 ..
54 Ceti
a Trianguli ..
10-180
10-509
8-629
9-755
io'i8o
o. 47- 30'38
0.53.55-96
i. 18. 37-25 60-81
i. 18. 40-43 j 63-64
29-65
62-44
30. 0-59
35- 49-98
39. 42-46
42. 51-62
45. 9-10
46. 55-69
10-367
10-180
10-053
11-832
10-180
8-546
10-180
21. 8.
21. IO.
21. 13.
21. 17.
21. 22.
21. 36.
22. II.
22. 13.
22. l6.
22. 29.
22. 34-
22. 36.
II.
2575
29-39
16-49
10-23
4'OO
40-52
11-78
16-54
8- 7 I
52-38
30-25
8-93
25-30 i II-9I
28-62 ! 15-36
2'Sl
56-27
l6'2C
9-63
14-25
39-47
10-86
I5-55
7-86
51-54
23'
23. 15.22-42
23. 20. 4-31
23. 21. 28-52
23. 23. 46-45
23. 28. 17-40
23. 28. 17-23
8-22
3774
51-65
21-84
373
27-66
45-72
27-31
2-28
54-46
38-25 :
16-58
54-83
-13-39
13-26 ',
-i3-39i
-I3-36 '
-15-60
13-27
13-27
13-40
13-29
13-36
I339
'94 '
14
|8 9
89
'76 i
14-
27-86 12-76 15-
-13-82
-13-69
-13-81
-I3-77
13-5
-I3-55
-'3-54
13-66
-I3-52
-I3-58
13-60
13-88
13-81
-I3-94
13-91
13-91
19 Piscium E 9(10-180 23.40.57-04
21 Piscium E
(p Pegasi 10
B.A.C. 8315 E
a Piscium E
2 Ceti E
33 Piscium E
5 Ceti
7 Pegasi...
35 Piscium ' W
Bradley 1672 S.P W
Bradley 1672 S.P.
J Andromeda
( Andromedre .
20 Ceti
77 Piscium
101 Piscium...
ir Piscium
v Piscium ...
1888 October 14. Observer L. Transit B.
21. 45. 11-77
21. 48. 16-33
21. 51. 47-14
21. 56. 37-68
22. O. 20-54
22. 2. 6-30
22. 5.51-64
22. 22. 30-14
21. 36.
22. 38.
22. 41.
22. 43-
22. 47.
22. 49.
22. 52.
22. 55.
23. I.
23- 4-
23. 6.
2^8.
23. II.
23- 13-
11-20
3-72
2686
58-66
5-25
I- 3 8
I6-59
12-15
40'57
41-89
23-8I
50-37
40-56
54-53
I5-S2
46-49
3671
19 75
579
55H2
59-96
30-7I
20-91
3 '99
49-97
50-92 i 35-13
36-64 18-59
io"53
3-28
26-34 i
5774
4'39
o-44
16-03
11-38
41-21
23-12
49-52
39-82
54-82
47-48
10-48
42-00
48-58
44-70
0-17
55^3
24-10
25-41
7-26
33'67
23-97
37-93
15-91
-15-86
-1578
15-80
-15-76
15-82
1579
18-05
-1571
15-80
15-86
15-74
-15-81
I5-74
15-86
-1575
-15-79
15-80
15-86
-I5-85
-15-85
-15-76
-16-16
-16-10
-16-02
-16-03
-15-98
-16-04
-16-00
-15-86
-I5-95
-16-00
-15-88
-15-94
-15-87
-15-98
-15-87
-15-90
-15-90
-15-96
-15-94
-15-94
-15-84
Pegasi
K Piscium .....
70 Pegasi .......
Bradley 3147.
Bradley 3147
1 9 Piscium
21 Piscium
<t> Pegasi
a Piscium
12 Ceti
5 1 Piscium s
13 Ceti
TT Androniedae
5 Andromeda!
2 Ursa? Minoris
2 Ursa; Minoris
33 Ceti
Piscium.
37 Ceti
9-743
10-708
10-180
10-180
7-496
-180
10-180
21. 22. 873
21. 34. 13-86
21. 36. 45'U
21.39- 1-54
21. 41. 12-46
21.45. 13-83
1888 October 15. Observer L. Transit B.
B.A.C. 7641 |W
a Aquarii j W
i Pegasi ! W
19-61
12-79
44-01
0-79
11-39
I3-37
57-87 | 21-74
55-20! I7-59
26-30 j 17-71
43'oS I 17-71
-1778
55-40 17-97
-18-00
-18-12
-18-10
-18-17
-18-35
B Pegasi . . ,
6 Aquarii..
7 Aquarii .
11-580
12-171
10-180
10'iSo
19-18
59-30
2-60
6-52
52-75
38-81
56-44
48-46
I3-38
39-70
23. 28.
23. 40.
23. 44-
23- 47
23- 53-
o. 24.
o. 26.
o. 29.
0.31.
-33-
o. 54-
0. 54. 4-69
1. 5. 7-19
i. 7-59-57
i. 9. 5-15
21. 5I.49-27
22. O. 22-55
22. 2. 7-99
22. 4. 53-32
22. II. 16-25
22. l6. 13-04
October 14, Bradley 2993 W was observed on wire IX.
October 15. Groombridge 3548 W was observed on wire IX.
19-58
56-56
61-30
61-30
49-82
38-81
41-84 I 31-45
50-94 I 40-55
8-50 58-11
55-29 ! 44-81
23. 44. 0-29
23.47. 4-17
23. 50. 10-93
23- 53- 50-57
23. 58- i7'3i
23- 59- 53-21
o. 2.45-10
o. 7-45-04
o. 9. 29-73
o. 14. 8-06
o. 14. 11-66
o. 33- 37-45
o. 41. 41-48
0. 47. 34-44
1. 25.47-00
1. 30. 4-57
1.31.27-07
i. 35- 53-65
23. 15. 24-32
23. 20. 6-24
23. 21. 30-44
23.23.48-37.
23. 28. 19-61
59-46
3-56
10-19
49'8l
I6-27
52-3I
44-24
44'39
42-58
45-83
50-00
56-54
36-10
2-61
38-61
30-46
30-69
28-95 15-20
46-08; 31-97
48-28 31-97
23-21
26-91
19-59
32-18
49^4
12-39
38-83
8-13
49-88
13-84
31-89
.2-53
12-53
42-58
45-83
50-00
36-10
21-88
39-62
31-53
56-88
23-21
40-90
33-55
46-30
3-86
26-34
52-84
23-79
5-7i
29-68
47-72
28-75
1-82
S'93
52-04
37-98
55-73
47-64
12-98
39-26
11-27
11-44
6-43
59-05
4-28
48-56
21-68
15-29
I2'l6
50-34
42-92
48-07
30-69
3-98
49-95
35-12
57-57
54-44
10-07
- 5-88
+ 0-49
2-34
IO'2O
10-51
10-39
10-39
10-39
10-48
I3-67
I3-63
-13-56
-I3-65
I37I
-I 3 66
1370
-1378
1370
-1375
14-11
16-31
I3-74
I3-99
1396
14-12
14-02
13-95
14-01
15-66
-I5-83
-15-84
-I5-83
16'22
I5-72
-I5-97
15-99
-I5-93
I5-94
16-10
16-11
i6'ii
i6'io
16-05
14-80
-14-97
16-09
16-13
l6'2I
-17-87
-17-70
-17-51
-17-41
-17-72
-17-72
s
9-99
-10-05
-10-35
-IQ'22 !
-10-22 j
-IO-2I !
-10-30 i
-13-72
-13-67
-3;59
13-73
-13-66
13-70
-1378
13-68
-1373
13-66
-{3-85 !
13-79
-1372
1377
-15-74
-I5-90
-I5-9I
-I5-89
-i6'oo
-l6'O2
-t5-95
-15-95
-16-06
-16-07
-16-06
-16-04
-15-99
-I5-97
-16-01
-16-08
-18-24
-18-04
-17-84
-1774
-18-03
-18-02
70
TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
Star's Name.
Position.
No. of Wires.
K.A.
Micrometer.
Observed
Transit.
Corrected
Transit.
Tabular
Apparent
E.A.
Clock
Apparently
Slow.
>>j;
:3~o '
y p i-, es
o
ail
$s-
Star's Name.
Position.
No. of Wires.
: f
^
Observed
Transit.
Corrected
Transit.
Tabular
Apparent
K.A.
>,
ss
|S^
O J-j o
O S.02
1
>>-
*3"b-J
-M C^ 88
Ipl
S-S3
3z*
Bradley 2993
W
E
E
E
E
K
!:
El
B
i-:
E
K
K
K
E
E
E
]:
E
E
E
E
E
E
B
!;
E
E
i-:
K
K
W
W
w
\v
W
w
w
W
\v
\v
\v
W
E
W
E
E
E
E
E
K
j.;
B
E
K
K
E
W
W
W
9
8
9
9
9
9
9
9
9
9
9
9
3
9
9
9
5
9
9
9
9
9
5
9
9
9
9
9
7
9
JO
8
5
9
9
9
9
9
9
9
9
9
9
10
IO
5
9
9
9
9
9
9
9
9
9
9
IO
10
9
9
r
1 1 '41 1
12739
I0'l8o
j
II
II
II
I
t
i
i
10-180
II
I)
1 f
II
II
II
II
tt
II
II
)
Jl
9-279
9-185
10-180
ii
1 1
ii
ii
i
i
i
i
10-611
10-896
10-180
ii
i
i
i
8-258
8-217
io'i8o
It
1888
h m s
22. 22. 25-83
22. 22. 29-37
22. 29. 57-06
22. 32. 18-29
22. 34. 34-97
22. 36. 13 64
22. 38. 6-17
22. 41. 29-22
22. 44. I -20
22.47. 7^5
22.49- 375
22. 52. 1875
22. 58. 41-89
23. I. 42-88
23. 4.44-15
21. 34. 17-92
21. 36. 48-90
21. 41. l6'IO
21.45. !7'4i
21. 48. 21-98
2I.5I.52-87
21. 54.5 6 -42
21. 56.43-49
22. 0. 26-48
22. 2. I2'l6
22. 4- 57-57
22. 11. 2O 'OI
22. 13. 24-94
22. 16. 16 94
22. l8. 51-95
22. 22. 58-20
22. 22. 59'42
22. 32. 22-40
22.36. 17-36
22.38. 9-89
22. 44. 4-65
22. 47. 11-30
22. 58-45-49
23. II. 46-65
23. 14. 0-77
23. 15. 30-70
23. 20. 1 2 '60
23. 21. 36-62
13. 2O. 0-64
13- 19- 59-38
21. 36. 52-34
21. 41. 19-76
21. 45. 20-99
21. 48. 25-72
21. 51. 56-60
21. 55. 0-28
21. 56. 47-22
22. 2. l6'00
22. 5. 1-33
22. II. 23-97
22. 1 6. 20-63
22. 23. 1-90
22.23. 3^5
22. 32. 26-O2
22. 34. 42-63
Oct<
s
33-98
36-70
56-13
17-31
34-58
12-84
5-63
28-59
O'lO
6-63
2-63
18-07
41-31
42-06
43-34
188
17-06
48-02
15-24
17-08
21-59
52-32
55-8i
42-62
25-79
11-76
56-95
19-25
24-12
16-24
51-12
65-69
65-35
21-55
1 6 -66
9-42
3-70
10-42
44-98
45-88
59-91
30-15
12*04
35-83
1888
28-77
29-64
5 I- 43
18-87
20-64
25-30
56-02
59-64
46-32
15-58
0-69
23-18
19-91
9-12
9-85
25-22
42-34
)ber
s
18-35
18-35
38-23
59-57
16-56
54-81
47-47
10-47
41-99
48-57
44-69
0-16
23-14
24-09
25-41
\ Get
55-18
26-27
53-59
55-37
59-91
30-67
34'2i
20-88
3-96
49-92-
35-10
57-55
2-24
54-42
29-27
42-78
4278
59-55
5479
47H5
4I-97
48-55
23-12
23-95
37 9i
8-n
49-86
13-82
Oct<
o-37
o-37
26-24
53-S6
55-34
59-88
30-64
34-18
20-85
49-89
35-07
57-52
54-39
42-36
42-36
59-53
16-50
15. L
S
-15-63
-iS-35
17-90
1774
18-02
18-03
18-16
18-12
18-11
18-06
17-94
17-91
18-17
17-97
I7-93
ober 1
-21-88
-2175
21-65
21-71
21-68
21-65
21 '60
2174
21-83
21-84
21-85
2170
-2i -88
21-82
21-85
22-91
-22-57
22-00
21-87
21 "97
21-73
2I-87
21-86
-21-93
22 'DO
22-04
-22-18
22'OI
iber 1
28-40
29-27
-25-19
-25-31
-25-30
25-42
-25-38
25-46
25-47
-25-69
25-62
25-66
-25-52
26-76
27-49
-25-69
-25-84
'bserer
a
18-16
17-99
18-26
18-27
-18-39
-18-34
-18-33
18-27
18-14
18-10
-18-35
18-14
18-09
7. 01
22-23
22'IO
21-99
22-O4
22-OO
21-97
2I-9I
22-05
22-I3
-22-13
22-14
21-97
22-14
22-08
22'ID
22-22
22 'O8
22-18
21-92
22-05
22-01
22 '05
22-11
22-15
22-28
22-10
3. Ob
-25-55
25-66
-2564
-2575
25-71
-25-78
-2579
25-99
-25-91
- 2 5'94
-2578
25-92
26-06
L. Transit B. c
<iQ Pe^asi ..
out
E
E
E
E
E
E
E
E
W
W
W
W
W
W
'W
B
w
w
E
E
E
E
E
E
E
E
E
E
E
E
E
W
W
W
w
w
w
w
w
w-
w
w
B
w
w
w
w
w
w
w
w
w
w
w
w
w
w
w
w
w
E
E
im
9
9
9
9
7
9
9
7
7
9
9
9
9
9
9
9
10
IO
6
9
9
9
9
9
9
9
9
9
9
IO
9
9
9
9
9
9
9
10
9
9
9
9
9
9
9
9
9
9
9
9
9
6
9
9
9
9
9
5
8
9
led.
r
10*180
u
> >
n
jj
ii
9740
9"324
I0*l8o
ii
9 )
J )
)
lo'iSo
"793
11749
io'i8o
;>
M
> j
> )
u
> >
10-554
1 1 '395
io'i8o
it
n
>
11-165
io'i8o
lo'iSo
i >
n
j
M
Jj
))
1 1 '178
11-399
10-180
h in s
23. 6. 26-06
23- 8.52-55
23. 11.42-79
23- 13- 56-95
23. 15. 26-82
23. 20. S'53
23. 21. 32-56
23. 28. 22-84
23. 28. I9T2
23-36.4I-35
23.41. 1-46
23- 44- 471
23.47. 8 -80
23- 5- I5-54
23- 53- 54-99
23- 23- 54-53
23. 28. 26-49
23. 28. 22-46
23- 36. 45-24
23. 41. 5-22
23- 44- 8-35
23- 47- 12-36
23- 53- 58-99
23- 56- 38-44
23. 58.25-74
o. o. 1-51
0- 2. 53-45
o. 4. 42 23
o. 7-53-53
o. 14. 18-47
o. 14. 14-61
o. 27. 2-39
o. 29. 54-70
o. 41. 49-87
o. 43- I7-99
0.47. 42-79
o. 50. 58-15
o. 54. 1179
i. o. 27-12
I. 3. 22-94
i. 5- I3-33
22. 36. 21 "14
22. 38. 13-67
22. 41. 36-58
22.44. 8-55
22. 47. 15-06
22. 49. 11-25
22. 52 26-27
22.55.2172
22. 57. 14-83
22 58.49-27
22. 59- 39-6i
23. I. 50-38
23- 4.5174
23- 6. 33-47
23. 9. 0-04
23. II. 50-19
23. 28. 29-13
23. 28. 27 67
23. 44. 12-22
s
25'24
5' '54
41-90
55-96
26-19
7-89
3!-65
33-02
30-92
40-50
0-64
3-85
8-17
14-78
54-20
53-86
3472
3279
4457
4-57
7-67
11-88
58-38
37-69
24-87
077
52-74
41-66
53-oi
56-70
56-26
1-65
53-86
49-33
17-26
4I-97
5779
17-87
26-36
22-03
12-55
20-49
13-26
36-08
7-65
14-22
10-32
25-74
20-97
14-61
48-83
39-02
49-72
51-08
32-80
59-21
49-47
38-28
37-65
11-52
s
7-25
33-67
23W
37-92
8-12
49-88
13-84
12-31
12-31
22-33
42-57
45-82
49-99
56-53
36-10
31-87
n-86
11-86
22-32
42-56
45-81
49-98
36-10
'5-43
62-60
38-61
30-46
1939
30-69
33-I5
33 15
39-62
31-53
26-92
54-9I
19-60
35HO
56-30
4-16
59-89
50-35
5477
47-42
10-43
41-95
48-53
44-65
0-13
55-59
48-72
23-10
13-25
24 07
25-37
7-23
33-64
23-94
11-49'
11-49
45-80
3
I7-99
-I7-8 7
7"93
18-04
18-07
iS-oi
17-81
20-71
18-61
18-17
18-07
18-03
18-18
18-25
18-10
21-99
22-86
-21-93
2225
22-01
21-86
21-90
22-28
22-26
22-27
22'l6
22-28
22-27
22-32
-2355
23-11
22-03
-22-33
22-41
-22-35
22-37
22 39
21-57
22-20
22 14
22-20
2572
25-84
-25-65
2570
-25-69
-25^7
25-61
-25-38
-25-89
2573
25-77
-2565
-25-71
-25-57
-25-57
-25-53
26-79
26-I6
-25-72
I
8
18-15
: 18-02
i - lS /7
18-17
18-20
18-12
17-92
18-24
18-12
18-07
18-22
18-28
18-12
22-08
-22-31
22-05
21-90
-21-93
22 30
22-27
22 '27
22'l6
22-28
22-26
22-30
21 -98
22-26
22-31
22-25
22-26
22-27
22-05
-2i 99
22-04
25-94
26-05
-25-85
-25-89
-25-87
-25-85
-25-78
-25-54
26-05
25-88
25-92
25-80
-25-85
2571
25-70
25-65
25-76
Bradley 2993 . .
v) Aquarii
96 Aquarii
Pegasi
ic Piscium
Bradley 3147
A. Pegasi
51 Pe^asi
21 Piscium
J8 1 Pe^asi ....
5$ Peerasi...
B.A.C. 8315
58 Pegasi .
>server L. Transit
K Capricorni
Bradley 3147
S Capricorni
Bradley 3147
1 6 Pegasi
\ Piseium
B A.C 7641
19 Piscium .
18 Pegasi
21 Piscium
29 Aquarii
A Peeasi ..
6 Pegasi
2 Ceti
Aquarii
33 Piscium
45 Aquarii
5 Ceti
y Aquarii
Bradley 2997
Bradley 167 z S P
Bradley 2997
Bradley 1672 S P
K Aquarii
51 Piscium
C Peo-asi
13 Ceti
TJ Pegasi
CAudromedife
T 2 Aquarii
A Aquarii
jS 1 Pegasi
jt Andromedse
y Piscium
96 Aquarii
T Pe ff asi
v) Ceti
v Pegasi
H Ceti
K Piscium
server L. Transit
Polaris S.P
Polaris S.P
fl Pegasi
K Capricorni
r 2 Aquarii
S Capricorni
14 Pegasi
16 Pegasi
B.A.C. 7641
18 Pe"asi
29 Aquarii
t Pegasi
cX Peffasi
Aquarii
y Aquarii
Bradley 2997
Bradley 2997
Bradley 3147
Bradley 3147
K Aquarii
10 Lacertae
STAR-TRANSITS OBSERVED AT PARIS AND RESULTING CLOCK ERRORS.
71
Star's Name.
3
*a
ObMrved
Transit.
II
Si .
-a"!
8 5
-i
Z2
=.-/>
Star's Name.
Observed
Transit.
^."S
83
53 .
It*
Q Pegasi
B.A.C. 8315
a: Piscium
y Pegasi
35 Pisuium
Bradley 16728.?.
Bradley 1672 S.P. .
12 Ceti
5 Aquarii
3 I'iscium
fi ] recast
55 I>gasi
58 Pegasi
59 l''gasi
<(> Aquarii
7 Piscium
T Pegasi
v Pegasi
K Piscium
70 Pegasi
Bradley 3147.
Bradley 3147.
B.A.C. 7641 ..
18 Pegasi
29 Aquarii
a Aquarii
i Pegasi
6 Pegasi .
9 Aquarii
45 Aquarii ....
1 Aquarii
Bradley 2997.
Bradley 2997..
K Aquarii
10 Lacertae
Pegasi
i) Pegasi
A Pegasi
r' 2 Aquarii
A Aquarii
5 Aquarii
51 Pegasi
3 Piseium
Aiidromedse .
1 Pegasi
a Pegasi
55 Pegasi
58 Pegasi
B.A.C. 7641 ..
18 Pegasi
a Aquarii
i Pegasi
6 Pegasi
9 Aquarii
45 Aquarii
y Aquarii
50 Aquarii
Bradley 2993 ,
\v
1888 October 19. Observer L. Transit B. continued.
lo'lSo
10-604
11-166
10-180
10-180
h m a
23. 47. 16-30
23. 50. 23'01
23. 54. 2-63
o. 7. 57-29
o. 9.4172
o. 14. 24-10
o. 14. 18-51
o. 24. 48-89
15-80
22-38
1-99
5675
41-10
2-42
58-44
48-08
49^7
56-51
36-09
30-68
21-87
-25-87
-25-90
-26-07
-25-91
-28-81
25-86
-25-89
-25-91
26-05
-25-89
-24-83
-26-21 ; 26 - I5
51 Piscium \V
i3Ceti W
TT Andromedse W
8 Andromedfe W
B Ceti ' E
Andromedse i E
20 Ceti E
22. 49.
22. 55-
22. 58.
23. I.
23. 4-
23. 6.
23- 9-
23. ii.
23- 15-
23. 20.
23. 21.
23. 24.
23. 28.
13^4
24-41
5 1 ' 2 ?
52-64
53-9I
35^4
2-32
52-60
36-41
18-23
42-42
0-32
29-60
12-75
23-68
50-85
52-00
53-28
35-I9
1-52
51-90
35-93
I7-75
41-70
59-72
9-484 23. 28. 29-90 38-50
44-64
55-58
23-09
24-06
25-36
7-22
33-63
23-93
8-08
49-84
13-80
3I-85
11-31
11-31
28-11
28-10
-27-76
27 '94
27-92
-27-97
-27-89
27-97
-2785
27-91
27-90
-27-87
-28-05
27-19
-28-25
-28-23
-27 88
-28-06
-28-03
-28-08
-27-99
-28-07
-27-94
-27-99
-27-98
-27-94
21 Piscium
35 Piscium
36 Piscium
Bradley 1672 S.P.|
e Piscium
7j Ceti
33 Ceti
Piscium
37 Ceti
/Piscium
u Piscium
Polaris
Polaris.
10-180
10-295
12-588
10-180
21.52. 1-45
.21.55. 5-I9
21. 56. 51-96
22. O. 34-87
22. 2. 20-62
22. 5. 5-89
22. II. 28-24
22. I 3 . 33-38
22. l6. 25-52
22. 23. 6-14
22. 23.
22. 32,
22. 34.
22. 36,
22. 38,
22. 41,
22.44,
22. 47,
22. 49.
22. 52,
22. 55'
22. 57.
22. 58.
22. 59.
2 3 . I,
23. 4.
673
30-45
4679
25H7
I7-8I
40-96
1279
I9-29
I5H4
30-70
26-33
18-93
5374
43-92
56-12
0-76
4'44
50-95
34-05
20-08
5-I4
2734
32-42
24-69
12-39
13-93
29-66
46-52
24-84
17-42
40-48
11-90
18-47
I4-53
30-18
25-59
1873
53-3I
43'34
54-I3
30-62
34"i6
20-82
3-90
49-86
35-05
57-49
2-19
54-37
41-95
4i'95
59-5I
16-47
54-75
47-39
10-40
41-92
48-51
44-63
60-11
55-57
48-69
23-08
I3'24
24-05
-30-14
-30-28
-30-13
-3 -i5
-30-22
-30-09
-29-85
-30-23
-30-32
-30'44
-31-98
-30-15
-30-05
-30-09
-30-03
-30-08
-29-98
-29-96
-29-90
-30-07
-30-02
-30-04
-30-23
-30-10
-30-08
-30-12
-30-36
-30-50
-3'3S
-30-36
-30-43
-30-29
-30-04
-30-42
-30-50
-30-30
-30-20
-30-23
-30-17
-30-22
-30-11
-30-09
-30-02
-30-19
-3 - i3
-30-15
-30-33
-30-20
-30-18
-30-21
59 Pegasi
Aquarii
Bradley 3147.
Bradley 3147
19 Piscium
21 Piscium
Pegasi
B.A.C. 8315
5 Ceti
34 Piscium
y Pegasi
35 Piscium
Bradley 1672 S.P
12 Ceti
51 Piscium ,
13 Ceti '
8 Andromedse . . .
,8 Ceti
5 Piscium
2 Ursae Minoris.
2 Urse Minoris.
77 Piscium
n Ceti ,..
33 Ceti
9 io'i8o
9
9
1888 October 20. Observer L. Transit B.
1888 October 21. Observer L. Transit B.
1888 October 23. Observer H T. Transit R
10-891
21. 52. 4-89
21. 55. 8-56
22. o. 38-37
22. 2.23-97
22. 5. 9-42
22. II. 32-04
22. 13. 3672
22. 1 6. 28-84
22.19. 377
22. 22. 44-98
4'2I
7-84
37^
23-44
8-67
3I-I8
35-88
28-02
2-83
5I-33
30-59
34-13
3'8S
49-83
3S'3
57H7
2-17
54-35
29-20
16-64
-33-62
-33-7I
-33-68
-3371
-3371
34-69
-33-82
-33-9I
-33-|7
-33-8
-33-88
-33;88
-3379
Bradley 2993 ,
f Pegasi
rj Pegasi
A Pegasi ...
r 2 Aquarii ....
A Aquarii
Aquarii
96 Aquarii
u Pegasi
K Piscium
10-180
IQ'343
10-180
10-233
11-33
lo'iSo
8775
8-343
10-180
9-912
10-180
7-9I5
7-911
10-180
9-291
IO-20O
o. 27. 6-36
o. 29. 58-35
o. 31- 2333
o- 33- 49-63
0.38. 27-43
o. 41. 53-20
o. 47. 46-25
23. 44. 14-69
o. 9. 44-04
O. II. 2O'2I
O. 14. 22 '99
0. 57- 39-34
. 3. 29-07
- 5.I9-38
. 8. n-86
9- I7-34
. 12.32-97
13- 50-44
- 19- 7-3
1. 18. 59-62
23- 6. 37-92
23- 9- 4'54
23. 28. 30-53
23. 28. 34-15
23. 41. 13-45
23. 44. 16-75
23. 47. 20-65
23- 50-27-30
o. 3. 1-47
o. 4- 5 "23
o. 8. i -43
o. 9. 46-18
o. 14. 28-15
o. 24. 53-27
o. 27. 10-95
o. 30. 3-10
o. 33- 54-52
o. 38. 32-48
o. 43. 26-56
o 54. 18-15
0. 54. 18-22 1 24-64
1. o. 35-14 34-37
I. 3. 31-01 30-08
I. 5. 21-26 20-47
5-67
57-55
22-96
49-22
26-52
52-76
45^3
13-90
43-33
19-50
3-84
38-62
28-16
18-61
ii-33
16-45
32-21
49'94
30-58
25-89
373
40-48
43-I9
12-67
I5-94
20-03
26-57
0-63
49-53
0-76
45 '45
8-78
52-48
10-28
2-32
54-I3
31-54
25-89
22. 22.
22. 36.
22. 3 8.
22. 41.
22. 44.
22. 47.
23- 9-
23. 14.
23. 20.
23. 21.
44-58
29-07
21-41
44-61
16-54
23-18
8-20
12-51
24-07
48-26
51-17
28-40
20-96
44-08
15-62
22-32
7-35
11-67
23-54
47 '49
39-62
31-52
56-88
23-22
0-58
26-92
19-60
45-80
15-19
51-32
33*'
10-48
59-90
50-36
42-94
48-09
3 '9
21-56
0-42
-26-05
-26-03
-26-08
-26-00
-25-94
-2584
- 2 5'93
-28-10
-28-14
-28-18
-30-04
-28-14
-28-26
-28-25
-28-39
-28-36
-28-31
-28-38
-30-16
60-42 25-47
-25-99
-25-96
-26-00
-25-92
-25-85
-2574
-25-81
-28-13
-28-12
-28-16
-28-02
-28-13
-28-12
-28-25
-28-22
-28-16
-28-23
7-21
33-62
11-14
11-14
42-54
45-78
49 96
56-50
30-44
19-38
30-68
15-18
34-01
21-87
39-61
3I-52
23-21
0-58
56-20
56-20
4-I7
59-90
50-36
16-64
54-72
4736
10-38
41-90
48-49
33-6o
37-86
49-81
1378
-30-05
-30-11
-32-05
-30-13
-30-16
-30-07
-30-19
-30-15
-30-08 |
-30-27
-34-77
-30-61
-3 67 ,
-30-80
-30-92
-30-96 !
-30-97
-28-44
-30-20
-30-18
-30-11
-30-14
-30-19
-30-16
-30-18
-30-09
-30-09
-30-18
-30-14
-30-06
-30-25
-30-S7
-30-62
-30-75
-30-86
-30-89
-30-90
-30-10
-30-07
-30-00
-34-53
-33-68
-33'6o
-3370
-3375
-3373
33 7 '
-33-82
-33-84
-33-94
-33-82
-33-87
33-79
33-77
October 23. Bradley 2993 E was observed on wire VI. Bradley 2993 W was observed on wire IX.
72
TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
EC
>>_
.4
1
S
"^ ^
t-
s
*3 -
- "tS
"3 ""3'~b -J
Star's Name.
Positio
IS
"3
6
V
< a
!
Observed
Transit.
11
I*
111
E
1|f I
Star's Name.
.
'3
*
v
SI
u
Observed
Transit.
|f
IP
11 * 11*1
55,55 5S,g2
121
5
1
< , -H
*
*
<
701 _
Bradley 3147
Bradley 3147..
19 Piscium ...,
21 Piscium ....
<t> Pegasi
B.A.C. 8315 ..
a Piscium
2 Ursse Minoris.
2 Ursse Minoris.
<(> Piscium
37Ceti
a Aquavii
t Pegasi
6 Pegasi
9 Aquarii
45 Aquarii
7 Aquarii
Bradley 2993.
Bradley 2993.
T) Aquarii
K Aquarii
10 Lacertse....
( Pegasi
>) Pegasi
\ Pegasi
r' 2 Aquarii ....
\ Aquarii
S Aquarii
19 Piscium.
<f> Pegasi
30 Piscium .
2 Ceti
33 Piscium.
1888 October 23. Observer H T. Transit B. continued.
w 9
W 10
E I 10
E 9
K
\v
10-200
9-971
23. 24. 6-24
23.28. 33-84
10-181 23.28.35-97
IO*2OO 23. 41. 17-26
23. 44. 20-46
23. 47. 24-45
23.50.31-07
2 3 . 54. IO-70
5^9
42-98
44-79
16-49
19-67
30-35
9752
13-360
JO-20O
o. 54. 21-62
0. 54. 22-96
1. 8. 17-42
i. 9. 22-88
28-39
29-48
16-88
21-99
31-82
10-76
10-76
4578
49-95
56-49
36-07
56-15
56;i5
48-09
-33-77 ! -33'82
-32-22
34-03
-3396
-33^9
-33'9
-33-^6
33-90
32-24
33 '33
-33-93
33-90
-33]99
33 '92
-33-88
-33-9I
-33-8o
/Piscium ,
u Piseium
Polaris...
Polaris
101 Piscium .
TT Piscium....
105 Piscium .
v Piscium
o Piscium
B.A.C. 551..
54 Ceti
o Trianguli..
Arietis
IO'2OO
IJ
9-607
8-924
10-200
I. 12.
38 '66
37-90 3-91
I. I 3 .
56-05
55-54 21-57
I. I 9 .
12-58
36-48 ; 1-26
I. 19.
'3-63
38-46 1-26
I. 3 0.
24-51
23-88 49-90
I.3I.
47-20
46-55 12-45
i. 34-
I5-79
15-18 : 41-09
1.36.
1373
13-00 38-89
i. 40.
6'2O
5-5I I 31-53
i-43-
!5'43
I4'68 ' 40-64
1.45.
32-08
32-22
58-21
1.47.
19-51
19-05
44-92
i. 49.
4-66
4-9
30-12
35-22
33-89
-33-86
-37-20 ...
-33-98 , -33-84
-34-10 ; 33-96
33-94
-33-96
-33-82
-34-09
-34-II
-33 '9 8
-34-04
-34-01
33 oo
-33-85
>j ' r*j ~r
-34-I3 -33'96
1888 October 26. Observer H T. Transit B.
E
3
E
9
E
7
E
9l
E
9;
E
9
E
10
W
IO
W
W
7
W
t
9
W
9
W
Q
W
7
e
W
3
Q
W
y
9
W
9
E
5
E
6
E
7
E
Q
E
q
IO*2OO
22. 0. 44-82
44-59
3-84
H
22. 2. 3078
30-66
49-79
J
22. J. 1 6'02
15-82
34-99
II
22. II. 38-54
38-28
57 '43
|J
22. I3.43-27
42-99
2-13
>
22. 1 6. 35-40
35-I7
5431
10-668
22. 22. 53-37
55-68
15-88
10-538
22. 22. 54-54
57-67
15-88
IO-2OO
22. 30. 19-23
19-07
38-11
,,
22. 32. 40-55
40-37
59-45
V
22. 34. 57-22
57'25
16-39
)
22. 36. 35-69
35-57
54-69
,,
22. 38. 28-19
28-17
47-32
II
22.41. 51-34
51-28
10-34
22. 44. 22-98
22-76
41-87
22.47. 29-59
29-40
48-46
))
22 49. 25-72
25-49
44-58
II
23.41. 23-62
23-41
42-52
))
23- 47- 3'-04
30-89
49-93
j)
23- 56. 56-57
56-32
I5-39
: >
23. 58. 43-67
43-37
62-55
jj
o. o. 1975
19-50
38-57
-40-75
-40-87
-40-83
-40-85
-40-86
-40-86
-39-80
-41-79 I
-40 -96
-40-92
-40-86
-40-88
-40-85
-40-94
-40 -89
-40-94
-40-91
-40-89
-40-96
-40-93
-40-82
-40-93
-40-83
-40-95
-40-91
-40-92
-40-93
-40-93
-41-02
-40-98
-40-92
-40-94
-40-91
-40-99
-40-94
-40-99
-40-96
-40-90
-40-97
-40'93
-40-82
-4 '93
5 Ceti
F
9
10*200
34 Piscium
F
ft
F
6
Bradley 1672 S.P
V
IO
9'7OO
Bradley 1672 S.P. . .
W
IO
13 Ceti
W
Q
IO'2OO
IT Andromedse
w
c
w
{)
' '
20 Ceti
w
ju Andromedae
"W
2 Ursse Minoris
w
?o
o'l'i*
77 Piscium
w
Q
IO"2OO
?) Ceti .
w
W Ceti ...
w
7
37 Ceti
w
7
f Pisciura
w
Polaris
w
rq
lO'THl
Polaris . ....
F
I c
1 1 '\^\
101 Piscium
F,
9
IO"2OO
105 Piscium
F
o
v Piscium
K
9
o. 3. 11-55
II- 3 I
o. 5. 0-51
0-33
o. 8. 11-85
11-68
o. 14. 26-80
20-03
o. 14. 17-66
13-09
o. 30. 12-70
12-52
o. 31. 37-68
37-68
c. 34. 4-09
4-07
o. 48. 0-79
0-62
o. 51. 16-16
16-20
o. 54. 32-51
3573
i. 0.45-41
45-27
i. 3.41-29
41-08
i- 5-3I78
3 I-6 3
i. 9. 29-58
29-38
i. 12.45-24
45^9
i. 19. 26-34
37-64
i. 19.34-44
42-87
i. 30. 31-08
30-91
1.34.22-37
22'21
I. 36, 2O'22
20-Q2
1888 October 27. Observer H T. Transit B.
Groombridge 3548
W
TO
7*644
y Capricorni
W
IO'2OO
K Capricorni
w
i|
w
o
14 Pe^asi.,
w
9
1 6 Pe<*asi
\v
9
B A C 7641
w
w
o
"
29 Aquarii
\v
7
\v
9
t Pe^asi
w
6 Pegasi
w
9
w
"
45 Aquarii
\v
9
Bradley 2993
w
TO
IO'2II
K Aquarii
E
IO*2OO
10 Lacertse
K
Q
f Peeasi . . .
E
fj Pe^asi
K
F,
9
T 2 Aquarii
E
7
E
o
K
^
B
9
K
21. 22.
21. 34.
21-37-
21. 39.
21. 45.
21. 48.
21. 52.
21-55-
21. 57.
22. O.
22. 2.
22. 5.
22. II.
22. 13.
22. 22.
34-18
37-55
8-77
25-27
37-34
41-98
12-90
16-39
3-i7
46-27
32*00
17-32
39-92
4470
54*88
38-86
37-18
S'39
25-05
37-24
41-85
12-69
16-15
2*80
45-99
31-87
17*08
39-6o
44-35
58-41
22.32.41-97 41-67
22.34.58*72 58-68
22. 36. 37-15 36*93
22. 38. 29-60
22. 41. 5275
22. 44. 24-41
22. 47. 30*93
22. 49. 27 '10
22. 52. 42-40
22. 57- 30-74
52*60
24-06
30-61
26-73
42-23
30-73
53H9
55^3
2&-I2
42-92 i
55-201
5975 '
30-53
34-08
20*73
3-83
49-77
34-98
57-41
2*12
i I5-59
59'44
16*37
54-68
47-3I
io"33
: 41 *86
; 48-45
44-57
0-04
48-61
45'37
42-15
42-27
42-13
42 '04
42-10
42-16
42-07
42-07
42-16
42-10
42-10
42-19
42-23
42-82
42-23
42-31
42-25
42-19
42-27
42-20
42-16
42-16
42-19
42-12
-42-44
-42-56
-42-41
-42-31
-41-37
-42-42
-42-32
-42-32
-42-40
-42-34
-42-33
-42-41
-42-45
-42-41
-42-48
-42-42
-42-35
-42-43
-42-35
-42-31
-42-30
-42-33
-42-25
S 1 Pegasi
a. Pegasi
34 Piscium
y Pegasi
35 Piscium
36 Piscium
Bradley 1672 S.P.
Bradley 1672 S.P.
12 Ceti .
51 Piscium
13 Ceti
TT Audromedse....
5 Andromedse...
20 Ceti
n Andromedse...
2 Ursse Minoris.
i) Ceti
33 Ceti
Piscium
37 Ceti
/Piscium
u Piscium
Polaris...,
Polaris.
E
9
E
5
E
9
E
9
K
9
E
9
E
IO
W
IO
W
9
W
9
W
9
\v
9
w
4
w
9
w
9
w
20
w
5
w
9
\v
9
w
5
w
9
w
5
w
20
E
2O
IO-2OO j 22. 59. 5-39
10*140
10-142
IO-20O
9-261
IO-20O
10-429
10-333
5. i '86
S. 13-13
o.
o.
o- 9- 57-63 ! 57-40
o. u. 33-83 ' 33-60
o. 14. 28 57
30-43
19-36
30-66
35-54
35-54 i
31-51
56-86
23-20
1960
35-40:
55-97
4-18
59-91
50-37
48-10
3-92
0-95
0-95
49-91
41-10
38-91
23-OI
I3-I8
-935
30-65
15-I6
5^29
18-44 35'99
i -64
12-94
o. 14. 28-02
o. 25. 4-55
O. 27. 22-12
o. 30. 14-06
o. 31. 3930
o-34- 5-63
O. 48. 2'2I
o. 5 1 - -7 79
0. 54. 34-80
3. 4276
5-33-o6
8-25-53
9. 30-84
12. 46-79
H- 4'23
19. 28-46
1. 19. 30-48
1771
4-25
21 88
1377
39-22
553
i-93
1776
38-42
42-43
32-80
2539
30-52
46-53
4-11
4I-37
43-I5
35-99
21-86
39-61
3I-5I
56-86
23-20
19-60
35-40
55-8?
59-9I
50-37
42-96
48-10
3-92
21-58
0-72
-40*88
-40-97
-41-02
-37-55
-41-01 ;
-40-82
-40-87
-41-02
-40-80
-41 -09
-41-17
-41 '26
-41-28
-41-17
-36-69
-41*92
-41 -oo
-41 -II
-41*11
-42-26
-42-18
-42-29
-42-29
-42-24
-42-31
-42-45
-41-72
-42-39
-42-27
-42-26
-42-36
-42-33
-42-33
-42-36
-42-55
-42-52
-42-43
-42-43
-42-42
-42-61
-42-53
-40*65
072 42-43
-40-88
-40-97
-41-02
-40*99
40-80
-40*85
40*99
40-76
-41-05
41-21
41-23
41*12
-40-94
-41-05
-41-05
-42-38
-42-30
-42-28
-42-27
-42-22
-42-29
-42-34
-42-21
-42-20
-42-30
-42-26
-42-24
-42-26
-42 -40
-42-30
-42-30
-42-29
-42 '47
-42-38
October 23. Bradley 3147 W was observed on wire IV. Bradley 3147 E was observed on wire III. 2 Ursse Minoris W was observed on wire VIII. 2 Ursse Minoris E was
observed on wire I.
October 26. Bradley 2993 E was observed on wire VII. Bradley 2993 W was observed on wire III. Bradley 1672 S.P. E was observed on wire VII. Bradley 1672 S.P.
W was observed on wire I.
October 27. Groombridge 3548 W was observed on wire IX. Bradley 2993 W was observed on wire VI. Bradley 1672 S.P. W was observed on wire III. 2 Ursse Minoris W
was observed on wire V. (10 bisections, mean reading 9 r '942) aud on wire VIII. (10 bisections, mean reading 8 r '58o). Polaris E was observed on wire IV.
TRANSITS OBSKRVED AT PARIS AND RESULTING CLOCK ERRORS.
73
Star's Name.
.2
No. of Wires.
RA.
Micrometer.
Observed
Transit.
Corrected
Transit.
~ 's
-t _, .
W
III
O S.X
<
Clock
Apparently
Slow at o 1 '
Sidereal.
Star's Name.
Position.
No. of \Vires. 1
R.A.
Micrometer.
Observed
Transit.
Corrected
Transit.
~ -
S tu
115
S
>>
ill
O S.'f.
m
<
Clock
A|ijrently
Slow at o>>
Sidereal.
101 riscium .
tr Pisciutn....
a Triai-gnli ..
Arietis
A Arietis
112 Piscinm .
33 Piscimn
34 Piscium
7 Pegasi
Bradley 1672 S.P.
Bradley 1672 S.P.
IT Andnmiedae
8 Andromeda
2 Ursa; Minoris....
2 Urste Minoris.
8 Amh-omi'dre...
f Andruwedte...
S ?isciiiin
20 Cfti
/j. Andromediu ..
2 Ursse Minoris.
2 ITrsiv Minoris.
33 Ceti
</> Piscium
37 Ceti
v Pisoitim
Polaris....
1888 October 27. Observer H T. Transit B. continued.
10-200
. 30. 32-48
3I-5S'07
.47.27-58
. 49. 12-85
. 52. 26-91
55- S'02
32-28
54-86
27 '47
12-68
26-76
4-76
49-91
12-47
44-95
30->4
44-29
22-26
42-52
42-47
42-19
42-21
42-30
42-32
42-24
42-50, 42-27
6oCeti
o Ceti
Arietis...,
f-Ceti
27 Arietis.,
29 Ai-ietis.,
9 10-200
5
9
9
9
9
1. 58. 12-44
2. 14. 2678
2. 19. 34-42
2.22.57-85
2. 25.27-36
2.27.31-79
I2'l6
26-49
34-20
57^2
27-18
3I-59
1888 October 30. Observer H T. Transit R
E
9
E
7
E
6
E
9
W
10
W
2
W
g
W
10
IO*2OO
it
10-831
11-595
IO-2OO
9 -'065
11-924
o. o. 26-13
o. 5. 6-86
o. 8. 18-19
o. 14. 34-28
o. 14. 38-13
o- 3i- 43-93
o. 34. 10-51
o. 54. 40-61
o. 54. 40-56
25-94
6-76
18-10
26-56
28-46
44-01
10-57
44-19
38-54! 47-40
19-34
3064
47-42
47-46
37'34 i 49 '22
37-34
56-85
23-19
55-53
43-38 : 55-53
-51-12
47-16
-47-38
48-66
-47-85
47 '4O
Polaris
47 '42
47*46
Polaris
tj Piscium
101 Piscium
47*14
v Piscium
47 '36
aTrianguli
j8 Arietis
\ Arietis..
10-137
10-091
IO-2OO
1. 19. 36-07 45-92
1.19.
1.26.
30-
32.
30-
47-
49-
1.52.
1888 November 9. Observer H T. Transit B.
W 9
W 9
W 9
W 9
W
9
W 10
E 20
E
9
E
9
E
9
E
9
E
20
10-746
11-369
10-200
9-584
o. 34. 37 -09
o. 42. 40-95
o. 44. 9'ob
o. 48. 33-92
o. 51.49-34
o. 55. 2-64
0-55-
6.
4'95
10. 2-73
14. 36-02
I9-58-73
3678
40-58
8-58
3336
49-11
7-42
4'37
5694
2-07
35-61
23-14
2687
19-56
35^5
54-57
54-57
50-36
48-09
21-57
-7364
-73-71
-73'7'
-7380
7376
-72-85
-74-96
74-01
73-99
74-04
-76-36
-73'55
-73 60
-73-60
-73-68
-73'63
-73-84
-73-So 1
-73-85
Polaris
'.IT Arietis
e Arietis
aCeti
p P.-rst'i
Persei
5 Arietis
( Arietis
Groombridge 2283 S.P.
Groombridge 2283 S. P.
/Tauri
20
9-101
7
IO'2OO
7
9
,,
7
II
9
II
9
II
9
'5
IO-I27
'5
9-978
9
IO'20O
i. 19,
2.47.
2.54,
2.57.
2.59.
H
3- 9'
3- H.
3- H
3-25.
36-43
19-66
37-5I
0-08
26-40
32-27
17-69
3'74
54-90
36-08
6-32
48-85
19-63
0-04
26-33
32-32
17-69
3176
72-42
35-64
S'93
18-21
17-98
II'IO
10-90
31-18
30-77
45-56
45-17
9-60
59-12
1077
61-53
59-07
58-56
29-71
43-97
51-68
15-09
44-56
49-04
59-88
59-88
32-25
4992
12-48
38-92
44-96
30-16
44'3 r
57-62
2I'6l
51-67
28-42
6376
5676
1 6 -66
31-02
45-35
4535
44-41
42-45
42-52
42-52
42-53
42-62
46-04
-48-97
-47-38
47-56
-47-56
47-41
47-36
-47-53
47-45
-74-80 j
-74-03
-74-07
-74-22
-74-14
-74-11
-74-I5
-76-18
-74-I5
42-21
42-25
42-24
42-25
-42-33
42-26
47-34
47-52
-47-52
47-37
47'3'
-47-48
47-40
-73-61
-73-82
73-62
-73-76
-73-68
73-64
1888 November 13. Observer H T. Transit B.
fl A'|uilc ...
w
o
IO'2OO
20. 6. t *,6'4t;
=;6'23
32 "6"%
83**;8
84-08
V
IO'2OO
23. 48. 13-91
13-73
49-78
83-95
83-98
69 Aquihe
W
o
20. 25. 12*87
I2'6"i
J -3
83-fiQ
8i-o:
12 Ceti
V
9
o. 2"i. 4"!-8q
4"; '62
21-77
83-85
81-80
w
"
2O. 2Q 16*17
e.
C 2 -g 4
83*i;6
84-01
K
6
o. 28. 3-80
V";?
?Q--;2
84-0-;
81-99
Del pi till i
w
o
2O. 31. 29'lS
20' O2
C'2O
83*73
84-18
13 Ceti . .. .
F
7
o. 30. 55-89
55-62
31-43
84-19
84-13
lira-ill ry 2701 . ...
w
7
20. 31, 10*06
I2"2O
48'06
j / j
83*24
K
"
o. 32. 20-90
20-78
56-76
84-02
Bros
75 Dmcnnis
w
7
20. 36. 33*41
34'6f;
IO*Q2
8V7-J
S Andromedae
F,
9
o. 34. 47-36
47-22
23-11
84-11
84-04
3 Aquarii
w
o
20. 43. 14*78
14*'?'*
won
8^-60
8d*O2
2 Ursa; Minoris
F,
re
10-477
o. 55. 14-69
16-96
53'89
83-07
15 Dolphin!
w
e
*"
2O. 4"i. 42*"i7
42*42
1878
83-64
84-06
Bradley 2993
w
ii
3*807
22. 23. 32*"s4
3"i*26
W
10
10-023
o. -;". i";'Q2
18-17
53-89
84-48
A Pegsisi
w
o
10*200
22. 42. 34*l8
34 '06
10*10
81-06
84-11
^ Ceti
W
n
IO'2OO
. 4. 24-63
24-38
59-87
84-51
84-37
T" Aquat'ii
w
22. 4*;. <;*87
c-6i
41*66
8^-q;
8j."i i
w
n
. 14. 46*04
4-i'94
21-57
84-37
84-21
A Aquarii
w
o
22. 48. 12*48
12*24
48*2-;
8VQ9
84* I -C
Polaris
w
70
10-390
. 20. 10-76
20-64
55-70
84-94
S Aniiftrii
w
o
22. *;o. 8 ;*;
8-28
8^'Q2
84*O7
51 Pf'iisi
w
a
"
22. S3. 23'8'*
23*72
cq-g^
8t'8q
84'O3
F,
70
10-128
. 20. l8'I2
25-22
55'7
90-52
3 Pisi'iuin
w
6
22. 56. I9'8l
IQ'6o
IS "32
84-28
84*42
v Piscium
F,
7
IO-2OO
. 36. 3-46
3'2j
38-93
84-30
-84-09
o Aiuli'OMH'ila:
\v
9
22. 58. I2'24
12*22
48'3O
8rQ2
84*Os
K,
9
. 40. 56-18
55'96
31-58
84-38
84-16
/J 1 Pu r 'asi
w
o
22. 59. 46*87
46'77
2278
83 'QQ
84'12
B
6
. 48. 9-17
9"3
44'99
84-04
83-80
w
Q
23 O, 37*1 I
36'QC
I2'Q7
83 '08
84-11
F,
i
I. 40. 54'6l
54-45
30-20
84-25
84-01
55 Pc^asi
w
o
11
23. 2. 48*00
47-82
23'8o
84*02
84' 14
K Avietis
i
o
1.53. 8-71
8-55
4V35
84-20
-83-95
n8 Pe^asi ..
w
n
23. 5. 4Q'27
4Q'OQ
2C'I I
8ro8
8a.'io
3 Triani'uli . ...
F,
9
2. 4. 2O74
20-61
56-24
84-39
84-12
co Ptizasj
w
23. 7. 31 P I "i
3O'Q7
*j 11
6'Q7
84 oo
84-12
F
4
2. 40. 2O'95
20-73
56-31
84-42
84-08
Aquarii
w
o
23. 9. 5772
*i7'48
-j-i-^8
84-10
84-21
39 Avietis
B
2. 42. 42-44
42-30
17-88
84-42
84-07
y Pisiiium
w
o
23. 12. 47'97
4.7 '77
23'7O
84-07
84-16
41 Arietis . ...
B
2. 44. 51-34
51-19
26-82
-84-37
84-02
96 Aquarii
w
23, i ?. i *oo
1-67
*J / w
37 '6"i
84-02
84-12
K
2. 46. 46-23
46-03
21-64
-84-39
84-04
T I'eyasi
w
o
23. 16. 31*91
31*70
7*82
81-97
84-06
i\ Eridani
K
2. 52. 24-81
24-52
60-17
-84-35
-83-98
Bradley 3147
\v
?o
Q 7O3
23. 2Q. 2 TOO
28-84
4'76
84-08
Arietis
B
7
2. 54. I6-26
16-09
51-70
8439
84-02
a Ceti
E
9
2. 57. 53-20
52-96
28-45
-84-51
-84-13
BiMillcy 3147...
E
?o
lO'W?
23. 20 2T*;S
28-63
4'76
81-87
F,
2. 59. 28-13
28-04
63-80
-84-24
-83-85
E
10*200
23. 42 6 '60
^,u vj
6'4*\
84-08
84*12
j8 Persei
F
n
3. 2. 21-23
21-15
56-80
-84-35
-83-96
October 30. 2 Ursa 1 Minoris E was observed on wire I. Poluris E was observed on wire VI.
November 9. 2 Ursse ilium-is E was observed on wire III. (15 bisections, mean reading n r '278) and wire I. (5 bisections, mean reading ii'"644). GroombriJge 2283 S.P. E
was observed on wire IX.
November 13. Bradley 2701 and 75 Draconis were observed without moving the micrometer. Bradley 2993 W was observed on wire IX. Bradley 3147 W was observed on
wires I., II., IV., V. (5 bisections with each, mem readings 9 r- 826, 9''"552, 8 ri 958, iof'47S respectively). Bradley 3147 E was observed on wires IV., II., I. (5, 10 and
5 bisections, mean readings lo r '54O, 10^-442, 10-956 respectively). 2 Ursas Minoris E was observed on wires IX., VIII., VI. (5 bisections with each, mean readings
io r -287, io' 754, IO 1 '-39O respectively). 2 Una Minoris \V was observed on wire IX. Poluris E was observed on wire III.
GREENWICH OBSERVATIONS, 1899.
k
TRANSITS OBSERVED AT GREENWICH
AND
RESULTING CLOCK ERRORS.
Star's Xame.
Observed
Transit.
it
Star's Name.
Observed
Transit.
Ill
o am
3 Aquarii
15 Delpliini
p Aquarii
32 Vulpeculse
21 Capricorni
a Equulei
Groombridge 3548 (E. & E.
34 Piscium .
y Pegasi
15 Delpliini
H Aquarii
32 Vulpeculoe
21 Capricorn!
Equulei
a Cygni
1 Pegiisi
Groombriilge 3548 .
K Aquarii...
jo Lacertte.
f Pegasi ....
jj Pegasi ....
A Pegasi....
r 2 Aquarii ..
9 Aquarii
y Aquarii
Bradley 2993.
TI Aquarii
K Aquarii
10 Lacerta?....
( Pegasi
17 Pegasi
A Pegasi
r 2 Aquarii ....
A Aqnarii
5 Aquarii
51 Pegasi
33 Piscium.
34 Piscium.
A Ursse Minoris...(E. & E.) E
E I 9
9-900
10-275
9-900
9-219
9-900
9-900
9 -'500
9-900
1888 September 30. Observer L. Transit C.
20.41.45-67
20. 44. 13-41
20. 46. 32-82
20. 49. 43"io
20. 54. 29-60
21. 10. 9-57
21. 21.45-44
4- 1 3 "59
7- 25'05
4573
13-56
'32 '86
9-68
52-29
24-99
19-38
3878
49-05
35-55
15-55
2-94
I9-39
30-68
+ 5-88
582
5-92
5-69
5-96
+ 5-8?
+10-65
5 88
5-69
5-91
5-85
5-95
572
5-98
5-88
5-69
35 Piscium
36 Piscium
Bradley 1672 S.P.(E. & E.)
5 Andromeda 1
( Andromeda-
5 Piscium
v Piscium 1 E
Polaris (E. & E.) E
1888 October 1. Observer L. Transit C.
19. 35. 20-16 26 70 39'i9
20. 44. 13-27
20. 46. 32-8]
20.49.43-09
20. 54. 29-55
21. IO. 9-75
21. 12. 57-36
21. 16. 50-67
21. 21. 57'52
22. 31- 53-35
22. 34. 10-42
22. 35. 48-66
22.37.41-37
22. 41. 4-32
22. 43- 35 80
13-43
3295
43-25
29-68
9-90
57-51
50-83
56-62
53-68
1 0-80
49-00
4I-/4
4-68
36-13
I9-37
3S77
49'03 !
35-54
'5-54
3-05
56-45
2-60 !
59-68
16-73
54-93
io'6o
42-10
12-49
5'94
5-82
578
5-86
5-64
S'54
5-62
5-98
6'oo
5'93
5-87
5-92
S'97
5-96
5-84
5-80
5-88
5-65
5-55
b'OI
5'94
5'94
5-88
5-93
5-98
A Aquarii
8 Aquarii
51 Pegasi
o Andromeda;.
ft 1 Pe<;asi
a Pegasi
55 Pegasi
Bradley 3147..
Bradley 3147..
cii Piscium
30 Pi-cium
2 Ceti
33 Piscium
5 Ceti
34 Piscium
7 Pegasi
W 21
W o
W
W
W 9 |
W! 9'
Wi 9
W' 9
1888 October 3. Observer L. Transit C.
22. 10.
22. 15.
22. 22.
22. 29.
22. 31.
22. 34.
22- 35-
22. 37.
22. 41.
22. 43.
22. 46.
22. 48.
22. 51.
51-41
48-35
19-20
3^97
53-9I
10-64
49-12
41-88
4-50
36-07
42-65
38-78
23- 59- 3 2 -27
o. 4. 13-22
51-60
48-52
15-16
32-14
54-09
10-61
49-25
41-91
4-57
36-28
42-
54-57
3271
13-61
57-68
54-55
2073
38-33
59-67
1670
54-9I
47-59
10-59
42-09
48-66
44-78
0-26
38-61
I9-39
6-08
6-03
5-57
6-19
5-58
6-09
5-66
5-68
6 '02
5-81
5-82
579
5-69
5-90
5-78
6-08
6-03
6-19
5-58
6-09
5-66
5-68
6-02
5-8i
5-82
579
5-69
5-90
5-78
7
35 Piscium
36 Piscium
Bradley 1672 S.P
51 Piscium
13 Ceti
TT Androinedfe
5 Andromeda;
2 Ursa; Minoris
2 Ursre Miiioris .
TI Ceti
33 Ceti
Polaris
Polaris .
9-900
h i
o. 9
o. 10
o. 13
0.33
o. 41
0. 42
J- 13
1. 18
9-31
45-5I
26-87
17-41
2I'I2
. 49-08
I7-58
3178
22
"42
24
'44
'II
9-900 22.46.42-27
22. 48. 38-34
22. 51-53 92
22. 56. 42'6l
22. 58. 16-89
22. 59. 7-00
23. I. 17-83
23.28. 6-63
5"
i
900
42-60
38-67
5427
43-00
17-25
7-35
18-17
8-84
23. 28. 9-13
23. 53- 29-86
23. 56. 9-09
23- 57- 56-13
23- 59- 32-18 | 32-33
O. 2. 24-24
o. 4. 13-24
o. 7- 24-38
8-20
30 'oi
9-24
2439
I3-40
24-54
15-19
5i-3i
30-26
23-17
26-85
54-84
21-42
59-I5
48-67
44-79
0-27
48-92
23-25
13-38
24-17
14-46
14-46
36-10
I5-44
2'6l
38-61
30-46
I9-39
30-68
9-900
M
8700
9-900
2313
9-900
II-8I4
IO-I76
24-76
9-49
45-62
24-33
o. 7- 24-39
o. 9. 9-10
o. 10. 45-23
o. 13. 21 -18
o. 26. 33-48
0.29. 25-44 25-87
o. 30. 50-76 51-06
0.33. 17-18 17-50
0.53. 51-24 50-45
30-69
15-20
51-32
30-70
33-88:39-59
31-50
o- 53- 53-I5 48-98
i. 2. 53-79! 53-99
I. 4- 44-I5 j 44-31
I. 19. 11-70! 56-91
i. 18. 56-88; 53-47
23-18
56-30
56-30
59-82
50-27
59-54
59-54
5-89
IO'O2
5-73 i
574!
5-86
9-01
6-07
6'12
6'Oo
5-92
6-00
6-03
6-00
5-62
6-26
6-09
6 -20
6-35
628
6-07
5-99
6-14
5-93
57i
570
6-37
57i
5-63
579
5-68
5-85
7-32
5-83
5-96
2-63
6-07
5-97
573
5-85
5-58
6-08
6-13
6-oi
5-93
6-oi
6-04
6'oo
6-09
6 -20
6-35
6-28
6-07
5-99
6-14
S'93
5-70
571
5-63
5-68
5-83
September 30. Groombridge 3-548 E and Bradley 1672 S.P. were observed without moving the micrometer. Polaris was observed on wires VI., VII., VIII., IX.
TRANSITS OBSERVED AT GREENWICH AND RESULTING CLOCK ERRORS.
75
Star's Name.
<
PS!
Observed
Transit.
1!
Hi
sis!
Star's Xame.
Observed
Transit.
J-fi
.-. a
IP III I III
H < 3- Sn. x
3 Aquarii E
15 DeljiMni E
/i Aquarii ! E
32 Vulpecuhe E
21 Capricorni
6 Capricorni .
61' Cygni
6i 2 Cygni
v Aquarii
7 Equulei
f Cygni..
a Equulei ....
Cygni
K
E
K
E
E
K
E
E
I Pegasi E
5 Capricorni ................... W
14 Pegasi ....................... W
16 Pegasi
10 Laceita?
W]
W j
C Pegasi ........................ |W|
n Pegasi ........................ W
3 Piscium ...................... W
J3 1 IVgasi
58 Pegasi
59 Pegasi
Aquarn \\
61' Cygni
6i' 2 Cygni
v Aquarii
7 liquulei
f Cygni
a Cygui
I Pegasi
Groombridgc 3548.
Groombridge 3548.
K Capricorni
S Capricorni
14 IVgasi
16 Pegasi
B.A.C. 7641
18 IVgasi
Bradley 2993
Bradley 2993
\ Aquarii
5 Aquarii
51 Pegasi
55 Pegasi
58P.'gasi
59 Pegasi
<t> Aqnarii
7 Pisi-ium
96 Aquarii
v Pegasi
v Pegasi
K Piscium
70 Pegasi
Bradley 3147
a Cygni
I Pegasi
Grooinbridge 3548
K
4
E
4
H
5
E
9
E
5
E
9
E
9
E
10
W
IO
W
7
\v
9
W
9
W
9
W
9
W
9
W
9
W
10
E
IO
K
9
K
9
E
9
E
9
E
9
E
9
K
9
E
9
E
9
E
9
E
7
9
Ji
9
E
9
E
10
Groombri.lge 3548 ........... W
Aqnarii ...................... ; W
1888 October 5. Observer L. Transit C.
9-900
h in s
s
s
20. 41. 45'00
4565
5^54
2O. 44. 12-85
"3 '39
I9-3I
20. 46. 32-33
33 'oi
37I
20. 49. 42-74
43'I7
48-97
20. 54. 28-80
29-55 35-48
20. 59. 34-49
35-24 | 41-08
21. I. 48-46
48-81
54-69
21. I. 5O-IO
50-45 56-26
21. 3. 24-98
25-68
3I-64
21. 4. 49'2o
4975 55-62
21. 8. 5-69
6-10 : 12-06
21. IO. 8-91
9-49 15-48
21. 12. 5674
57-08
2-98
21. 16. 49-86
5 - 35.
56-40 '
21. 38. 37-09
37-3I
43-22
21.40.47-54
47 '93
5374
21. 44. 49-69
49 '66
55-55
21. 47. 54-03
54-08.
0-08
22. 34. 10-93
10-84
16-68
22. 35. 48-73
48-94
54-90
22. 37. 41-66
4I-63
47-58
22- 54- 49'34
49-63 55-68
22. 58. 17-21
17-22 i 23'22
23. 4. 19-31
I9-53
25-46
23. 6. 1-17
1-40
731
23. 8.27-46
2779 ' 3372
5-92
570
5-80
S'93
5-84
5-88
5-81
5-96
5'87
5-90
6-05
5-9I
5-81
5-89
6'oo
5-84
5-96
5'95
6-05
6-00
5'93
5-91
5'93
5-91
5'94
5-72
5-82
S'95
5-86
5-89
5-82
5^7
5-88
5'97
6'oo
5-91
6-06
5-82
5-90
6-01
5-85
S'97
5-96
6-06
6'oi
5'93
5-9i
S'93
W
n
r
9'9OO
v Pefasi ...
W
5
K Pisciuin
\v
o
70 Perils i
\v
7
Bradley 3147
W
ID
1 1 -OI4
Bradlcv 3147
F
IO
12-iqi;
19 Pisciuin
K
9
9-900
F,
q
<f> Pegnsi
F,
B A.C. 8315
F,
9
F,
q
F
7
Bradley 1672 S P. .
F
IO
12-980
W
s
Q-QOO
W
W
ac
Q-QOO
1* Oti
W
9
9-900
(f> Piscium
W
6
?7 (Mi ...
W
q
f Piscium
W
q
W
n
W
10717
E
M
10-883
h m s
23. II. 17-72
23- 19- 43-79
23. 21- 7-53
23- 23- 25-58
23. 28. 17-94
23. 28. I I -14
23. 40. 36-13
23- 43- 39-42
23. 46. 43-84
23- 49- SO'I?
23- 53- 29-73
23. 56. 8-92
o. 13. 11-05
o. 41. 20-98
o. 42. 48-82
0. 53. 56-62
1. 4. 44-09
I- 7-36-95
I. 8.4179
i. II.57-65
I. 13. 15-36
i. 19. 15-67
i. 19. 2-77
S
s
17-98
24-02
43-87
49-93
7-81
13-88
25-77
3I-92
8-47
13-92
7 '44
13-92
36-73
42-60
4003
45^5
44'34
50 '02
50-73
56'55
30-31
36-11
9^9
ISHS
19-76
3 0-87
2 1 '05
26-88
49^5
54-87
49-50
56-34
44-36
50-29
37-02
42-86
42-I3
48-01
57-9I
3-82
15-40
21-47
50-52
59-92
52-52
59-92
1888 October 11. Observer H T. Transit C.
9-940
21. I.
47'57
47-40
54-57
,,
21. I.
49-10
4893
56-14
I 1
21. 3.
24-19
24-46
3I-55
11
21. 4.
48'35
48-45
55'53
, ,
21. 8.
479
471
n'95
!
21. 12.
55-68
55-50
2-86
))
21. l6.
49-01
49 4
56-31
9-581
21. 21.
56-50
48-87
59-42
9-300
21. 21.
55-26
48-76
59-42
9-940
21. 36.
18-60
1899
26-36
))
21. 40.
45^4
46-32
53-66
) )
21.44.
48-04
48-05
55-46
21. 47.
52 60
5265
O'OO
} )
21.51.
23-26
23-42
30-75
21. 54.
26-97
27-17
34-29
II
22. I.
42'6
42-91
45-01
9 -8 9 8
22. 22.
17-46
12-53
19-31
9-389
22. 22.
16-90
II'IO
19-31
9-940
22. 46.
4I-23
41-47
48-60
22. 48.
37-22
37-52
44-72
,
22. 51.
53-03
53-05
0-19
1
23- I.
16-83
16 '94
24-12
23- 4-
1 8 -08
18-19
25-43
,
23- 5-
59^6
60-08
7-28
,
23. 8.
26-26
26-48
33 '69
.
23. II.
16-66
16-81
23-99
,
23- 13-
30-54
30-76
37^5
)
23. IS-
I -00
0-99
8-15
23- 19-
42-68
42-67
49-90
>
23. 21.
6-43
6-60
13-86
23- 23.
24-51
24-60
31 90
9719
23. 28.
14-21
6-31
13-17
7-17
7-21
7-09
7-08
7-24
7-36
7-27
10-55
io'66
7-37
734
7Hi
7-35
7'33
7-12
7-10
6-78
8-21
7-13
7-20
7-14
7-i8
7-24
7-20
7-21
7'i8
7-19
7-16
7-23
7-26
730
6-86
7-19
7-23
7-11
7-10
7-26
7-38
7-29
739
7-36
7'43
7'37
7-35
7-I3
7-11
7-I4
7-21
7-15
7-i9
7-25
7-21
7-22
7-19
7-20
7-I7
7-23
7-26
7-30
Bradley 3147
A Pisciuin
19 Pisciuin
21 Piscium
<f Pegnsi
ui Pisciuin
30 Piscium
2 Ceti
33 Piscium
5 Ceti
34 Piscium
7 Pegasi
Bradley 1 6728. P.
Bradley 1672 S.P.
12 Ceti ................
51 Piscium ..........
13 Ceti ...............
ir AndromeJfe ......
5 Andromeda; ......
Ceti
33 Ceti
<t> Piscium
Polaris
Polaris
t\ Pisciuin
101 Piscium
TT Piscium
105 Piscium
v Piscium
W
10
9-714 i
W
9
9-940
W
9
,,
W
9
> >
W
9
>
W
9
W
9
j)
W
4
W
9
ii
W
7
ii
W
9
ii
W
9
ii
W
10
10-548
E
IO
10-517
K
9
9-940
E
7
II
E
9
It
K
9
:
E
9
>
E
9
II
E
9
i>
E
9
E
9
j
E
IO
9-238
W
IO
8-863
W
7
9 "94
W
9
W
9
D
W
9
i )
W
9
23.40. 35-16
23- 43- 38'29
23. 46. 42 '62
23. 53. 28-64
23.56. 7-88
23-57.55-37
23.59.31-23
O. 2. 23-04
o. 4. 12-07
o. 7. 23-22
o. 13. 8-43
o. 13. 6-45
o. 24. 14-43
o. 26. 32-28
o. 29. 24-18
o. 3- 49-63
o. 32. 16-01
o. 37- 53-07
. 2. 52-31
- 4-42-95
- 19- 15-39
- 19- 5 97
- 25. 24-45
. 29. 42-05
. 31. 4-70
- 33- 33-29
-35- Si' 02
1888 October 13. Observer H T. Transit C.
7-15
13-17
15-06
22-35
35-38
42-58
3853
45-83
42-72
50-00
28-84
36-11
8-17
15-44
55-76
2-61
31-52
38-61
23-31
30-46
12-23
19-40
23-36
30-70
22-31
31-45
22-65
3^45
14-64
21-88
32-42
39-62
24-39
31-52
49-51
56-88
15-93
23-21
53-39
0-57
52-57
59-87
43-11
50-33
35-60
42-90
54-67
1-30
48-29
1-30
24-58
32-16
42-19
49-82
4-86
12-37
33-42
41 'oi
31-22
38-81
6-04
6-06
6-07
6- I5
S'45
6-48
5-87
5-82
5-68
5-82
5-80
5'86
ii-n
5-83
5-82
6-84
5'93
5-84
5-88
5-91
6-07
9-40
7-40
6 -02
7-29
7 -20
7-30
7-28
7-27
6-85
7-09
7-I5
7-17
7-34
9-14
8-80
7-24
7 -20
7-13
7-37
7-28
7-i8
7-3
7-22
7-30
6-63
13-01
7-58
7-63
7-5i
7-59
7-59
6 '04
6-06
6-07
6-15
5-87
5-82
5-68
5-82
5-80
5-86
5-82
5'8i
5-92
5-83
5-87
5-90
6-06
7-29
7-20
7'3
7-28
7-27
7-27
6-85
7-09
7-i5
7'i7
7-34
7-24
7-20
7-I3
7-37
7-28
7-18
7-29
7-21
7-29
7'57
7-02
7-50
7-58
7-58
2'8l
7*71
7'77
7 Capricorni
W
q
9-940
21-33- 47-25
47^7
55-23
7-56
7-58
48^64
7-6"?
7'6<;
W
7
21. 36. 18-39
18-82
26'33
7-5I
7-53
10-333
21. 21. 58-27
5I'80
58-65
6-85
( Pegasi
W
W
9
q
11
21.38-35-25
21. 40. 45-62
35-5I
46-04
43'"
53^4
7-60
7-60
7-62
7-62
?v8*
cS-6<;
4 '80
14 Pegasi
W
q
21. 44. 47-68
47-81
55-43
7-62
7-64
7'C7
7'cc
16 Pe"usi
W
q
21.47. 52'28
52'44
59-97
7-53
7-55
October ii. Groombridge 3548 E was observed on wire VI. Groombridge 3548 W was observed on wire VI.
observed on wire VII. Bradley 1672 S.P. E was observed on wire VIII. Polaris E was observed on wire VII.
October 13. Groombridge 3548 E was ousei ved on wire VIII. Groombridge 3548 W was observed on wire VI.
Bradley 2993 W was observed on wire I.
Polaris \V was observed on wire III.
Bradley 3147 E was
76
TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS- GREENWICH, MADE IN 1888.
Star's Name.
Observed
Trunait.
I!
.?H
is*' lit
:* 5 Is
Hi!
Star's Name.
Observed
Transit.
1888 October 13. Observer H T. Transit C. continued.
9 Aquaiii
45 Aquaiii ....
7 Annarii
Bradley 2993.
Braille}' 2993..
\ Pegasi
T 2 Aquarii
\ Aquarii
3 Piscium
o Andromeda .
ft 1 Pegasi
a Pegasi
55 Pegasi
58 Pegasi
59 1'egasi.
<f> Aquarii
y Piscium
96 Aquarii
T Pegasi
v Pegasi
K Piscium
70 Pegasi
Bradley 3147..
Bradley 3147..
W 10
r
h n
1 &
s
8
9-940
22. IO.
49-68
50-04
57-59
H
22. 12.
54-40
54-80
2-28
22. 15.
46-54
46-87
54-46
10-041
22. 22.
I3-28
9-60
18-84
7-158
22. 22.
I6-I5
11-26
18-84
9-940
22. 41.
2-80
2-86
10-49
)
22. 43.
34'lS
34-48
42-01
; >
22. 46.
40-74
41-00
48-58
i
22. 54-
47^3
48-05
55-64
>
22. 56.
4I-29
41-19
48-80
22. 58.
I5-53
I5-57
23-15
> j
22. 59.
5-6!
574
13-30
M
23. I.
16-44
16-60
24-11
)j
23- 4-
i77i
17-87
25-42
)|
23- 5-
5953
5971
7-27
j )
23. 8.
25-80
2606
33-68
it
23. u.
16-30
16-50
23-98
t
23- 13-
30-13
30-38
37-94
t
23- IS-
o-43
0-50
8-14
23. 19.
42-22
42-29
49%
t
23. 21.
6-04
6-25
13-85
23- 23-
24-13
24-27
31-89
9-570
23. 28.
1275
6-07
12-76
9-690
23. 28.
10-30
5-32
12-76
7-55
7- 4 s
7-59
9-24
7-58
7-63
7-53
7-58
7-59
7-61
7-58
7-56
7-51
7-55
7-56
7-62
7-48
7-56
7-64
7-60
7-60
7-62
669
7"44
7-56
7-49
7-60
\ Piscium ! AV
19 Piseium J W
7-64
7-59
7-60
7-62
7-59
7-57
7-63
7'49
7-57
7-65
7-60
760
21 Pise-inn
<p Pegasi
B.A.C. 8315
W
AV
AV
W
W
w
\v
AV
AV
W
36 Hscium AV
Bradley 1672 S.P AV
30 Piscium.
2 Celi
33 Pisoium.
5 Ceti
34 Pisriiim.
y Pegasi .
Bradley 1672 S.P E
10 Ceti E
51 Piseiutn j E
5 Andromedie. E
ft Ceti E
Polaris j E
n Piscium i E
101 Piscium I E
ir Pix-iuni j E
105 Piseium E
v Piscium j E
r
h m 3
8
8
9-940
23. 36. 14-41
14-72
22-34
23. 40. 34-42
34-72 42-58
li
23.43.3778
38-10 45-83
ii
23. 46. 42-19
42-39
50-00
s j
23. 49. 48-61
48-88
56-54
) j
23. 53. 28-08
28-36
36-10
23-56. 7-36
772 15-44
)
23- 57- 54^9
54-82 i 62-61
23- 59- 30-56
30-91 38-61
11
O. 2. 22'44
22-78 30-46
)
o. 4. 11-45
11-70; 19-39
})
o. 7. 2272
22-94
30-69
?)
o. 10.43-38 43-65
5I-33
10 '067
o. 13. 12-08
22-74
3I-97
I0'022
o. 13. 7-4:
21-39
3I-97
9-940
0. 20. 47-49 47-71
55-29
o. 26. 31-84
32-02
39-62
,,
o- 33- I5-54
I5-55
23-21
,,
o. 37. 52-56
52-89
60-57
9-279
i. 19. 10-02 52-35
i'3
9-940
i. 25. 24-47 24-59
32-18
)F
i. 29. 42-05 42-18
49-84
1.31. 4-51 4-65
12-39
t|
I.33.33-25 33-36
41 'O2
; )
i. 35. 31-00! 31-19
38-83
7-62
7-86
773
7-61
7-66
774
7-72
779
7-70
7-68
7-69
7-75
7-68
10-58
7-58
7-60
7-66
7-68
9-03
7-59
7-66
774
7-66
7-64
1888 October 14. Observer II T. Transit C.
y Equnlei
E
K
E
E
E
W
W
W
W
AV
W
W
W
W
W
AV
AV
E
E
E
E
K
K
K
E
E
li
E
E
E
E
E
E
AV
w
AV
AV
W
W
W
9
9
9
9
6
9
9
9
9
9
9
9
9
9
IO
IO
9
9
9
9
1
9
9
6
9
9
9
5
9
IO
10
9
9
9
9
9
9
9-940
)1
9 : 378
8-568
9'940
it
)t
>
II
>
10-268
10-420
9-940
II
n
M
it
)
H
II
) j
i)
9-940
8-757
9-654
9-940
||
n
u
j >
2J. 4.47-60
21. IO. 7-42
21. 12. 55-05
21. 16. 48-33
21.21.59-39
21. 22. 2-82
2I.33.47-04
21. 38.35-04
21. 40. 45-38
21. 44. 47-58
21. 47. 52-05
21. 54- 26-37
22. I. 42-04
22. 4.27-07
22. 10. 49-43
22. 15. 46-33
22. 22. 16-51
22. 22. 17-24
22. 29. 30-30
22. 34. 8 -O
22. 35. 46-87
22. 37. 39-64
22.41. 2'7I
22. 46. 40-59
22. 51.52-27
22. 56. 4K05
22. 58. 15-38
23. I. 16-11
23. 4. 17-45
23- 8.25-63
23- IS- 0-37
1
21. 33. 46-88
22. 22. 18-93
22. 22. l8'6l
22. 35. 46-63
22. 37. 39-48
22.41. 2-33
22. 43- 33-63
22. 46. 40-26
22. 48. 36-30
47-89
7-74
55-07
48-54
52-64
55-49
47-50
3530
45-84
47-66
52-I7
26-65
42-I6
27-35
49'2
46-67
10-98
I2'l6
30-67
8-83
47-16
39-76
2*89
4I-OI
52-48
41-04
I5-52
16-41
1775
26-05
0-55
888
47-59
10-65
10-84
47-07
39-66
2'6l
3435
40-91
37-05
55H9
I5-35
62-79
56-26
58-26
58-26
55-22
43"io
53-63
55H2
59-96
34-25
49 '97
35-I3
57-58
54-45
1859
18-59
38-24
16-57
54-82
47-48
10-48
48-58
60-17
48-79
23-15
24-10
25-41
3367
S-I3
Octo
55-20
iS'35
18-35
54-81
47'47
10-47
41-99
48-57
44-69
7-60
7-61
7-72
772
5-62
277
7-72
7-80
779
776
779
7-60
7-81
778
776
778
7-61
6'43
7-57
7 74
7-66
7-72
7'59
7-57
7-69
775
7-63
7-69
7-66
7-62
7-58
3er 15
7-61
770
7-51
774
7-81
7-86
7-64
7-66
7-64
7-62
7-63
774
774
774
7-82
7-81
778
7-81
7-61
7-82
779
777
779
7 : 58
775
7-67
773
7-60
7-58
7-70
776
7-64
77o
7-67
7-63
7-59
. Obs
7-62
775 !
7-82 1
7-87
7-65 |
7-67 !
7-65 !
i v IVgasi
K
K
E
AV
W
W
AV
\V
W
w
AV
W
w
w
AV
E
K
W
E
K
E
E
E
E
i<:
E
E
t (
AV
W
W
E
E
E
E
E
E
9
7
9
10
20
9
9
9
9
9
7
9
5
9
10
10
7
IO
10
10
9
9
9
9
9
9
9
9
"i
9
9
10
IO
9
9
4
9
9-940
10-268
IO-2O2
9777
9-940
))
1)
) )
9-883
10-039
9-940
8-978
9-918
9'S74
9940
)l
f
9-940
9-839
11-882
9-940
JI
J|
n
23. 19.41-95
23. 21. 5-69
23. 28. 1 1 -66
23. 28. 12-48
o. 13. 10-60
o. 24. 1371
0.27.31-55
o. 29. 23-40
0-33- I5-37
o. 37- 52-37
o. 41. 19-13
o. 42. 46-84
0.47-11-52
0.51-27-53
o- 53- 54-58
o. 53- 54-27
o. 59. 56-19
i. 19. 11-13
i. 19. 15-38
. 19. 10-38
. 25. 24-20
.31. 4-42
33- 33-09
. 35. 30-82
. 42. 32-56
. 44. 50-12
- 46. 36-97
. 48. 22-17
22. 5I-5I-99
23. 21. 5-61
23. 28. 14-33
23. 28. 16-35
23.43-37-69
23.46.41-93
23- 49- 48-32
o. 7. 22-52
o. 9. 7-01
42-13
6-05
4-68
4-90
26-59
1407
31-83
23-76
15-45
52-84
19-26
47-11
11-86
27-51
48-90
49-05
56-53
52-58
55-28
51-83
24-45
4-69
33'33
3i-i4
32-90
50-40
37-09
22-38
52-31
6-16
3-67
4-99
38-21
42-23
4875
22-87
7-44
49-88
13-84
12-53
12-53
32-28
21-88
39-62
3I-53
23-21
60-58
26-91
54-90
19-59
3539
56-47
56-47
4-I5
i-33
I- 33
i-33
32-18
12-39
41-03
38-83
40-58
58-14
44-85
30-05
60-16
13-84
12-31
12-31
45-82
49'99
56-53
30-69
15-20
7'75
779
7-85
7-63
5-69
7-8r
779
777
7-76
. 774
7-65
779
773
7-88
7-57
7-42
7-62
875
6-05
9-50
7-73
7-70
7-70
7-69
7-68
774
7-76
7-67
7-85
7-68
8-64
7-32
7-61
776
7-78
7-82
7-76
775
779
7 ; 8i
779
777
776
774
7-65
778
7-72
7-87
7 ; 6i
772
7-69
7-69
7-68
7-67
773
775
7-66
7'86
7-68
f-6i
776
7-78
7-82
776
Bradley 3147
I Pegasi
Biadley 3147
Grooinl'riilge 3548
Bradley 1672 S.P
12 Ceti
13 Ceti
5 Capricorn!
ft Ceti
1 8 Pegasi
Pegasi
2 I'rsa; Minoris
Bradley 2993
Bradlev 2993
lo Lacertft;
X Pff'usi
BAG 551
erver H T. Transi
y Capricorn!
Bradley 2993...
Bradley 2993
Bradley 3147
TJ Pega*i
A Pegasi
T 2 Aquarii
BAG 811";
\ Aquarii
5 Aquarii
October 13. Bradley 2993 W was observed on wire I. Bradley 2993 E was observed on wire VIII. Bradley 3147 E was observed on wire VII. Bradley 1672 S.P. E was
observed on wire Vfl.
October 14. Groombriilge 3548 E was observed on wire VII. Groombridge 3548 AV was observed on wire IX. Bradley 2993 AV was observed on wire I. Bradley 3147 E was
observed on wire IX. Bradley 1672 S.P. W was observed on wires III. and I. (10 bisections with eacb, mean readings lo r 'O29 and 9 r '526 respectively). 2 Ursa; Minoris AV
was observed on wire IV. 2 Ursse Minoris E was observed on wire III. Polaris E (2nd observation) was observed on wire IV.
October 15. Bradley 2993 E was observed on wire VIII. Bradley 3147 AV was observed on wire IX. Bradley 3147 E was observed on wire I.
TRANSITS OBSERVED AT GREENWICH AND RESULTING CLOCK ERRORS.
77
1
Star's Name.
I
No. of Wires. !
R.A.
M lonMMtar.
Observed
Transit.
Corrected
Transit.
Tabular
Apparent
R.A.
>.
3 | *
- i
-^ga
<
5-O.J
1111
fi s
star's Name.
1
No. of Wires.
R.A.
Micrometer.
Observed
Transit.
Corrected 1
Transit.
Tubular
Apparent 1
R.A.
Clock
Apparently
Slow.
Clock
Apparently
Slow at o h
Sidereal.
j3 Ai[uarii
E
E
E
K
E
E
E
E
E
E
E
E
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
E
E
W
W
W
W
W
W
W
W
\v
\v
\v
W
W
W
W
W
W
W
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
W
7
9
9
9
6
9
9
9
9
9
9
10
10
9
9
7
9
9
5
9
9
9
9
7
5
9
10
10
9
10
9
9
9
9
5
9
9
9
9
8
9
9
9
9
9
10
10
10
10
9
4
7
9
9
7
9
9
9
9
9
7
9
9
9
10
10
r
9-940
) 1
> )
11-470
8790
9-940
It
) >
;;
:
9-893
9-820
9-940
8-432
9-940
))
1 >
)!
>>
> '
1 )
) 1
10737
9-867
10-006
10-473
9-940
)
11
)
11
)
9-803
9-832
i
h in s
21. 25. 33'2I
21.33.4671
21. 38. 34-83
21.40.45-14
21.44. 47-17
21. 47. 51-68
21.51.22-37
21. 54.25-95
21. 59. 55-60
22. I.4I-73
22. 12. 53-77
22. 22. 15-43
22. 22. 15-50
22. 48. 36-28
22. 51. 51-92
22. 54. 47-22
22. 56. 40 69
22. 58. 14-98
22. 59. 4-98
23. I. 15-81
23. 4. 17-09
23- 5.58-94
23. 8. 25-27
23- '9- 4i '59
23.21. 5-40
23. 23. 23-64
23. 28. 1 1 -90
23. 28. 10-68
23-34- 5'59
1
21. 21. 55-00
2I.33.45-98
21. 36. 17-1O
2 I.38.33-96
21. 40. 44-36
21. 44. 46-43
21. 47. 50-92
21. 51. 2I'6l
2I.54.25-I5
21. 56. u-66
21. 59.54-84
22. I. 40-92
22. 4. 26-OO
22. 10. 48-33
22. 12. 53'O6
22. I5-45-3I
22. 22. 9-93
22.22.35-78
22. 22. 19-71
22. 22. 44-99
22. 29. 29-99
22. 31. 51-18
22. 34. 3'6l
22.35.46-54
22. 37- 39-32
22. 41. 2-48
22. 43. 33-60
22. 46. 40-32
22. 48. 36-27
22. 51. 52-01
23. 13. 29-68
23- '4- 59^3
23. 19. 41-86
23. 21. 5'6l
23.23. 2373
23. 28. 14-39
23.28. 7-17
888
33-55
47-15
35-04
45-58
47-18
51-74
22-55
26-19
55-90
4179
54-18
9-5
8-86
36-65
5I-97
47-46
40-47
H-95
5-08
15-96
17-24
59-10
25-55
41-61
5-62
2377
2-88
2-60
5-84
888
53-63
4673
17-86
34-48
45-11
46-81
51-34
22-12
2570
12-43
55-45
4I-34
26-55
49-00
5379
45'93
8-96
34-8i
8-94
34-22
29-92
51-14
8-08
46-37
38-92
2-17
33-63
40-30
36-31
5174
29-65
5962
41-55
5-52
23-54
2-61
2-95
Octol
8
41-68
55-18
43-06
53-59
5537
59-9 1
30-67
34-21
3^6
49-92
2'24
1789
I7-89
44-67
6-I4
55^0
4875
23-I2
IS^
24-08
25^9
7-24
3365
49-86
IS^
SI'S?
11-86
11-86
I3-83
Octol
56-49
55-15
26-24
43-03
53-56
55-34
59-88
30-64
34-18
20-85
3-93
49^9
35-07
57-52
2'2I
54-39
I7-48
42-48
I7- 4 8
42-48
38-^9
59-53
16-50
54-77
47-42
10-43
41-95
48-53
44-65
0-13
37-90
8-09
49-85
I3-82
3^85
U'49
11-49
jer 17
8
8-13
8-03
8-02
8-01
8-19
8-17
8-12
8-02
8-06
8-13
8-06
8-39
9-03
8-02
8-17
8-14
8-28
8-17
8-19
8-12
8-iS
8-14
8-10
8-25
8-20
8-10
8-98
9-26
7'99
)er 19
2-86
8-42
8-38
8-55
8-45
8-53
8-54
8-52
8-48
8-42
8-48
8-55
8-52
8-52
8-42
8-46
8-52
7-67
8-54
8-26
8-27
8-39
8-42
8-40
8-50
8-26
8-32
8-23
8'34
8-39
8-25
8-47
8-30
8-30
8-31
8-88
8-54
Obs
.
r
8-03
8-02
8-20
8-18
8-13
8-03
8-07
8-14
8-07 j
8-03
8-18
8-15
8-29
8-18
8-20
8-13
8-16
8-15
8-ii
8-25
8-20
8-10
7-99
Obs
8 : 43
8-39
8-56
8-46
8'54
8-55
8-53
8-49
8-43
8-49
8-56
8-53
8-53
8-43
8-47
8-28
8-40
8'43
8-41
8-51
8-27
8-33
8-24
8-35
8-39
8-25
8-47
8-30
8-30
8-31
erver H T. Transi
t (
E
E
E
E
E
E
E
W
W
\v
w
E
E
E
E
E
E
E
W
w
AV
\V
If
W
w
w
w
w
i (
w
w
w
w
w
w
w
w
w
W
w
w
w
w
w
E
E
K
E
E
E
E
E
E
E
E
E
E
E
K
K
E
E
W
w
w
O
9
7
9
9
9
9
9
9
9
9
10
IO
4
9
9
9
9
IO
IO
9
9
9
9
9
I
9
9
-r
9
9
9
9
9
9
9
9
9
9
9
9
9
IO
10
9
9
9
9
9
9
9
9
IO
3
9
9
9
5
9
6
20
2O
9
9
r
9-940
M
H
))
ri
it
t)
J
If
II
9-93I
9-919
9-940
II
||
10'ooS
10-106
9-940
H
j >
1 )
PI
9-840
>i
9-940
>
ii
it
>
i
t
9-807
9-913
9-940
1 1
ii
H
)
M
10-321
9-940
) >
))
t)
10-032
12-028
9-940
It
ll 111 S
23. 36. 14-01
23. 40. 34-33
23.43.37-57
23. 46. 41 -81
23. 56. 7-12
o. 7-22-55
o. 33- IS'H
o. 41. 18-85
o. 42. 46-66
o. 50. 27-32
0.53-55-07
o. 53. 5670
0.57. 2-24
i. 2.51-43
i- 7-3478
i. ii. 55-62
i. 13. 13-44
i. 19. 15-18
i. 19. 17-34
i. 25. 23-98
i. 29. 41-65
i. 3 1 - 4-23
i. 33. 32-83
i. 35- 30-56
i. 39. 23-24
i. 42. 32-28
i. 44. 50-01
i. 46. 36-81
23-34- 5-62
23. 36. 14-09
23. 40. 33-88
23- 43- 37-14
23.46.41-43
23.49. 47-92
23- 56. 673
23- 57- 5379
23. 59. 29-91
o. 2.21-73
o. 4. 10-83
o. 7. 22-09
o. 9. 6-58
o. 10. 42 64
o. 13. 16-59
o. 13. no
0. 20. 47-04
o. 29. 23-32
o. 30. 48-84
0.33. 15-23
o. 37- 52 '28
o. 41. 18-82
. o. 42. 46-72
o. 47. 11-26
o. 53- 56-47
o. 59. 56-10
I. 2.51-54
I. 4- 42-03
i. 7-34-83
i. 8.39-63
I. II. 55-68
i. 13- ^'S 2
i. 19. 18-05
i. 19. 8-24
i- 35- 30-39
i. 39. 22-95
3
I4-29
34-59
37-86
41-93
7-47
2271
iS'H
18-85
46-83
27-16
48-28
50-61
2-47
51-81
34-85
55-88
I3H9
53-93
53-64
24-08
41-76
4-36
32-92
30-75
23-40
32-49
50-14
36-77
5-65
14-15
34-3
37-58
4172
48-29
7-23
54-39
30-40
22-19
11-19
22-40
6-95
43-01
25-56
24-91
47'iQ
23-41
48-56
14-98
52-48
18-65
4671
"'33
48-27
56-12
51-68
42-06
34-66
3975
55-7I
i3'3i
53-27
51-30
30-68
23-21
.
22-32
42-56
45-81
49-98
IS-43
30-69
23-22
26-92
5491
35-40
56-30
56-30
10-47
59-89
42-93
3-89
21-55
I'll
I'll
32-21
49-87
!2'42
41-06
38-86
31-50
40-61
58-17
44-88
I3-82
22-31
42-5S
45-80
49-97
56-5I
I5-42
2'59
38-60
3 -45
I9-38
30-68
I5-I9
51-32
33-6I
33'6l
55-28
31-52
56-88
23-22
0-58
26-92
54-9I
19-60
56-23
4-17
59-90
50-36
42-94
48-09
3-90
21-56
I'og
1-09
38-87
3I-5I
a
8'03
7'97
7'95
8-05
7-96
7-98
8-08
8-07
8-08
8-2 4
8'02
5-69
8-00
8-08
8-08
8-01
8-06
7'i8
7 '47
8-13
8-ii
8 -06
8-14
8-11
8-10
8-12
8-03
8-u
8-17
8-16
8-25
8-22
8-2 S
8-22
8-19
8-20
8-20
8-26
8-ig
8-28
8-24
8-31
8-05
870
8-18
8-n
8-32
8-24
8-10
8-27
8-20
8-27
7-96
8-05
8-22
8-30
8-28
8-34
8-19
8-25
7-82
9-79
8-19
8-30
A
8-03
7W
7'95
8-05
7-96
7^8
8-08
8-07
8-08
8-2 3 .
7'99
8-07
S-O?
8-00
8-05
8-12
8-10
805
8-13
8-10
8-09
8-ii
8-02
8-10
8-17
8-16
8-25
8-22
8-25
8-22
8-19
8-20
8-20
8-26
8-19
8-28
8-24
8-31
8-18
8-n
8-32
8-24
8-10
8-27
8-20
8-27
8-05
8-22
8-30
8-28
8-34
8-19
8-25
8-18
8-29
y Capricorn!
e Pegasi
5 Capricorn!
16 Pegasi
B A.C. 7641
18 Peasi
a Aquarii
i Pe ( 'asi
Bradley 200^...
Bradlev 2QQ3...
5 Atjuarii
ci Pe^asi...
TI Ceti
o Andromeda;
3 l Pegasi
a Pegasi
cr Pec'asi
58 Pegui
co Peasi ..
v Pegasi
K Piscium
70 Pegasi
Bradley 3147
Braille v 3 147
15.A.C. 551
i Piscium
Groom bridge 3548
>rver H T. Transi
K Capricorn i
t Pc'Hsi .
BAG 8315
1 6 Pegasi
B A.C 7641
2 Ceti
1 8 Pcfasi
33 Pisciuiri
29 A<}iiarii
c, Ceti
a Ai[uarii
34 Piscium
i Petrasi ,,,
y Pe^asi . .
rt Preasi
9 Af[iiarii
36 Piscium
45 Aquarii
Bradley 1672 S.P. .. .
1 Bradley 1672 S P
Bradley 2993
i>raiTley 2997
i IO Ceti
Bnullt-y 2993
13 Ceti
Bradley 2997
5 Andromeda
ft Ceti
K A< juarii
Androniedse
10 Lacert<e
8 Piscium
20 Ceti
17 Pegasi
A. Pewasi
77 Piscium
77 Ceti. ...
U Ceti
8 Aquarii
Piscium
5 1 Pegasi
37 Ceti
f Piscium . .
T Peo"asi ...
v Piscium
Polaris
Polaris .. .
Bradley 3147
v Piscinm
Bradley 3147
October 17. Bradley 2993 E was observed on wire IX. Bradley 2993 W was observed on wire I. Bradley 3147 W was observed on wire IV. Bralley 3147 K was observed on
wire IV. 2 Ursse Minoris W was observed on wire IV. 2 Ursse Minoris E wsis observed on wire IV. Polaris E was observed on wire VI.
October 19. Groombridge 3548 W was observed on wire IX. Bradley 2993 W was observed on wire I. Bradley 2993 E was observed on wire III. Bradley 2997 \\ was
observed on wire III. Bradley 2997 E was observed on wire II. Bradley 3147 E was observed on wire VI. Bradley 3147 W was observed on wire VI. Bradley 1672 B.P.
E was observed on wire VI. 2 Ursae Minoris K was observed on wire I. Polaris AV was observed on wire IX.
78
TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
g;
1
5
gj
t.
ft
&-
c
1
1
Star's Name.
1
is
O
. o
:
2
Observed
Transit.
11
ts
f |i
III
||fj
Star's Name.
t c
Is
*s
. D
<
c4S
Observed
Transit.
1
O
X
O
5
<5 H
3$
F
^s 00
d
S3
.H
m
X Ursie Minoris.
A Urste Minoris.
64 Aquilrc
Aquilae
7 Capricorni
K Capricorni
c Pegasi .
5 Capricorni ,
14 Pegasi
16 Pegasi
B.A.C. 7641 ....
18 Pegasi
t Pegasi
6 Pegasi
Bradley 2993
Bradley 2993.
71 Aquarii
K Aquarii
10 Laceite
29 Aquarii I W
Aquarii W
1 Pegasi W
6 Pegasi W
6 Aquarii W
45 Aquarii W
7 Aquarii W
50 Aquarii W
Bradley 2993 W
Bradley 2993 E
ij Aquarii E
K Aquarii E
10 Lacertaj E
Pegasi I E
D Pegasi E
A Pegasi E
r 2 Aquarii E
55 Pegasi E
7 Piscium ! E
96 Aquarii E
r Pegasi E
v Pegasi E
K Piscium E
70 Pegasi E
Bradley 3147 E
Bradley 3147 W
7
7
9
9
9
9
9
9
10
10
9
7
9
9
9
9
9
9
9
9
9
9
9
9
20
CPegasi W
17 Pegasi W
A Aquarii W
S Aquarii W
51 Pegasi W
3 I'iscium
o Andromeda
55 l>e K* si
58 Pegasi
<t> Aquarii
7 Piscium
T Pegasi j W
Pegasi |W
9735
11732
9-940
9755
9-409
9-940
9-940
9-697
10-694
9-940
9'577
20 9-865
9-940
1888 October 20. Observer H T. Transit C.
19. 35. 22-89
19. 35-
20. 2.
20. 5.
21. 33-
21. 36.
21. 38.
21. 40.
21. 44.
21.47.
21. 51.
21. 54.
22. 2.
22. 5.
22. 22.
24-04
7'59
24-37
46-41
1 7 '49
I -80
7-85
24-63
4677
17-87
44-87
46-89
51-36! 51-44
22-07 ] 22-24
25-53
41-30
46-93
2574
26-47
I3-58
26-68
9-11
22. 22. 13-62 i 8 '94
22. 29. 29-61 ! 29-85
22. 31. 50-93 I 5I-2O
22. 34. 8*'5 8*IO
12-94
16-23
33-01
55-13
26-23
43 ' OI
53-54
SS'33
59-8?
3 ' 6 3
34-I7
49-88
35-06
17-28
17-28
38-18
59-52
16-48
11*14
9-10
8-38
8-38
8-36
8-36
8-40
8-31
8-40
8*43
8'39
8-43
8-50
8-38
8-17
8-34
8-33
8-32
8-38
8-40
8-40
8-37
8-37
8-41
8-32
8-41
8-44
8-40
8-44
8-51
8-39
8-34
8-33
8-39
f Pegasi
77 Pegasi
21 Piscium...
t/> Pegasi
B.A.C. 8315.
2 Ceti
33 Piscmni...
34 Piscium...
Bradley 16728. P.
8 Andromeda:
Ceti
Andromeda;
20 Ceti
fn Andromeda
2 Ursre Minoris
77 I'iseiuin
n Ceti
33 Ceti
</> Piscium
37 Ceti ,
'
T888 October 21. Observer H T. Transit C.
21. 56. IJ'93
21. 59-55' 08
22. 1.41-29
22. 4. 26-28
22. IO. 48-62
22. 12. 53-28
22. 15.45-54
22. l8. 20-35
22. 22. 14-03
22. 22.
22. 29.
22. 31.
22. 34-
22. 35-
22. 37.
22. 41.
22. 43.
23. I.
23. II.
23- 13-
23. 14.
23. 19.
23. 21.
23. 23.
23. 28.
I3-I8
29'37
50-61
7-84
45-96
38-66
I5-27
15-09
28-96
59-39
41-14
4-96
23-00
9-19
I2 4 I9
55-22
41-21
26-36
48-81
53-52
45-69
20-59
8-19
29-59
50-86
772
46-10
38-63
174
33-29
15-42
15-28
29-22
59H2
41-17
5-17
23-12
2-40
23. 28. 11-90 ! 3-63
20-82
3-90
49-86
35-05
57-49
2-19
5437
29-22
17-08
17-08
38-17
59-51
16-47
54-75
47-39
10*40
41-92
24-05
23-92
37-88
8-07
49-83
13-80
31-84
11*14
11*14
8-63
8-68
8-65
8-69
8-68
8-67
8-68
8-63
9-14
8-58
8-65
875
8-65
876
8-66
8-63
8-63
8-64
8-66
8-65
8-66
8-63
872
8-74
8-64
8-69
8-66
8-70
8-69
8-68
8-69
8-64
8'59
8-66
876
8-66
877
8-67
8-64
8-64
8-64
8-66
8-65
8-66
8-63
872
A Piscium
19 Piscium
21 Piscium
tf> Pegasi
a Piscium
30 Piscium
2 Ceti
33 Piscinm
5 Ceti
34 Piscium
7 1'egiisi
35 Piscium
36 Tiscium
Bradley 1672 S.P.
Wj 9
\V'j 9
W| 9
W
Bradley 1672 S.P I E
13 Ceti E
B Ceti
<" Andromeda;....
S Piscium
20 Ceti
H Andromeda'...
2 Ursie Minoris.
T) Ceti
tj> Piscium
1883 October 23. Observer L. Transit C.
9-940
10-071
9-940
10-158
9-940
22. 35. 46-29 46-46
22. 37- 38-97 38-99
23- 43- 37- T 8 37-42
23.46.41-42 41*54
23. 49. 47-68 48-06
23- 57- 53-89 54-24
23- 59- 29-99 30-26
o. 4. 1078 10-95
5476
47HO
45-80
49-97
56-5
2-58
38-59
19-38
o. 13.
o-33-
0-37-
o. 41.
0.47.
0. 50.
0-53-
0.59.
i- 3-
1. 4.
i. 7.
i. 8.
11-50
14-61
51-68
18-24
10*82
26-81
51-03
4I-59
34-28
24-26 ;
14-65
52-06
8-33
1 1 -08
2677
48-50
55-03
51-35
4' ^
34-37
23-21
0-58
26-92
19-60
35-41
56-21
59-90
42-94
48-09
9-940 23.
23.
23.
23-
2 3-
23-
23-
o.
o.
o.
o.
o.
o.
10-966
10-134
9-940
11711
9-940
36.13-38!
4- 33-67
43- 36-96
46. 41 -37
53-27-32
56. 6-49
57- 53-57
59- 29-73
2. 21-63
4. 10-64
7.21-93
9. 6 -40
10. 42-48
13. lo-oo
I
13. 12-36]
29. 22 -68 i
30. 48-21 1
37- 5 1 "49;
41. 18-27
42. 46-17 j
47. 10-78!
50. 26-87
53- 53-26
2.51-05
7- 34-27
13-50
33-78
37-09
4' '35
27-40
6-67
29-90
21-78
10-69
21-94
6'47
42-5S
26-80
26-26
22-93
48-15
51-86
18-29
46-33
II'OI
26-75
48-14
5I-35
34-29
22-30
42-54
4578
49-96
36-08
15-41
2-58
3S-59
30-44
19-38
30-68
15-18
31-52
56-87
0-58
26-92
19-60
35-4I
56-20
59-90
22. 35-
22. 37.
22. 46.
22. 48.
22. 51.
22. 54.
22. 56.
23. I-
23- 4-
23- 8.
23. ii.
23. 14-
23. 19.
46-20
39-00
39'66
3574
5'-45
46-65
40-46
15-18
16-48
24-79
1509
59-54
41-15
i 46-50
39-06
40-15
! 36-32
51-64
47x6
40-32
16-79
25-26
15-47
1 59-70
41-32
5472
48-49
44*61
0*09
55-55
48-67
24-03
23-90
8-06
49-81
8-22
8-30
8-34
8-29
8-45
8-49
8-35
8-54
8-55
8-34
8-43
8-36
8-49
8-22
8-30,
8'34
8-29
8-45
8-49
8-35
8-54
855
8*34
8-43
8-36
8-49
Bradley 3147 W
Bradley 3147 1 K
A Piscium i K
19 Piscium E
21 Piscium E
Pfgasi E
{.'Andromeda: K
20 Ceti K
fi Andromeda E
2 Ursa; Minoris E
2 I'lva.- Minoris \V
10
9
9!
5.
9
9
5
9
10
684 23. 28. 11-44 1*19
9 940 23. 36. 13*37 13-80
(23.40.3373 34-I4
23-43- 36-93i 37-37
23.46. 41-43 41-68
o. 41. 18-29 i i8"47
! o. 47. 10-58 | 11-04
j o. 50. 26-90 26-88
8-854 : o. 53. 54-02 46-30
10-76
22-29
42-53
457
49-95
26-92
19-60
35-40
56-15
il
o 0.0:
8-30
8-41
8-38
8-43
8-45
8-34
8-33
8'43
9-54
8-56
8-52
8-59
8-52
8-64
771
8-54
8-55
8-53
8-57
8-51
8-80
8-76
8-69
8-61
8-68
874
8-74
8-69
8-66
8-69
8-74
8-71
8*76
7-21
775
8-59
872
872
8-63
S'59
8-59
8*66
8-06
8-55
8-66
10 11*579 | 23. 28. 11-81 : 0-85 10-76 9-91
9-5?
8-49
8-39
8-41
8-27
8-45
8-56
8-52
9-85
10 7-590 0.53.56-24,48-01 56-15 8-14
8-31
8-42
8-38
8-43
8-45
8-34
8-33
8-43
8-56
8-52
8-59
8-52
8-64
8-54
8-54
8-52
8-56
8-50
8-80
876
8-69
8-61
8-68
874
8-74
8-69
8-66
8-69
8-74
871
876
8-59
8-72
8-72
8-63
8-59
8-59
8-66
8-66
8'49
8-39.
8-41
8-27
8-45
8-56
8-52
October 20. A Ur.as Minoris W was observed on wiie IX. A Urste Minoris E was observed on wire I. Bradley 2993 W was observed on wire VII. Bradley 1672 S.P. E was
observed on wire IX.
October 21. Bradley 2993 W was observed on wire III. Bradley 1672 S.P. E was observed on wire IX. Bradley 3147 K was observed on wire VII. (10 bisections, mean
^.v _.. i _:.. ir r.~ i.:..: reading 9 r '392). Bradley 3147 W was observed on wire VII. (10 bisections, ini-iui leading 9 r *73O / and wire IX. (10
reading 9 r "762) and wire V. (10 bisections, mean
bisections, mean reading 9 r '999).
TRANSITS OBSERVED AT GREENWICH AND RESULTING CLOCK ERRORS.
79
Star's Name.
Observed
Transit.
II
3s ~ Sr
III I5S;!
Star's Ifanie.
I
Observed
Transit.
1888 October 26. Observer L. Transit C.
I'egasi
ai I'iscium
30 Piscium
34 Pisciiim
7 Pesjasi
35 Piscium
Bradley 1672 S.P.
Polaris...
W 9
W 9
7
7
9
W
W
:\V 6
10
9-850
11-141
23. 46. 40-69
23. 53. 26-52
23. 56. 5-90
o. 4. 9-99
o. 7.21-51
o. 9. 5-94
0. 12. 57-04
1. 19. 26-47
41-16
27-16
6-72
10-56
22-02
6-55
84-83
51-68
49-93
36-05
1539
19-36
30-66
15-17
35-I4
0-95
877
8-89
8-67
8-80
8-64
8-62
10-31
9-27
8-77
8-89
8-67
8-80
8-64
8-62
Polaris
\ Arietis
1 12 Piscium.
60 Ceti
15 Arietis....
19 Arietis....
67 Ceti
o Ceti
15-411
9-850
19. 26-32
Si- 35-I3
. 54. 12-96
57. 20-53
4. 19-03
6. 50-71
II. 17-15
13. 34-67
5I-6o
35-52
13-64
21-25
19-48
51-22
17-98
35-44
0-95
44-28
22-25
29-70
28-09
59-70
26 50
9-35
8-76
8-61
8-45
8-61
8-48
8-52
8-52
1888 October 27. Observer L. Transit C.
6 Pegiisi .......
6 Aquarii .....
45 Aquarii ____
y Aquarii .....
Bradley 2997.
Bradley 2997.
A Pegasi
T' J Aqivarii .
A Aquarii
5 Aquarii
51 Pasi
SjPegaei
58Peasi
59 Pegnsi
Aquarii
7 Piscium
96 Aquarii
!/ Pegiisi
K Piscium
9
5
9
9
10
10
9
9
9
9
7
9
9
9
9
9
9
9
9
9
9-850
7-814
9-850
22. 4. 25-64
22. 10. 48-05
22. 12. 52-56
22. 15. 44-89
22. 22. 44-00
22. 22. 41-31
22. 37- 38-52
22.41. 1-36
22. 43. 32-22
22. 46. 38-89
22. 48. 35-08
22. 51. 50-98
23. I. I4-69
23- 4- 15-99
23- 5- 5779
23. 8. 24-08
23. ii. 14-52
23. 12. 28-17
23. 19. 40-53
23. 21. 4-43
26-31
48-93
53-52
45^7
3334
3f64
38-88
I-8 3
39-82
5' 'So
1537
16-67
58-48
24-98
15-28
29-06
41-00
5-23
57-4I
2'12
54-30
40-I5
40-15
W33
41-86
48-45
0-04
25-30
7-16
23-87
37-83
49-78
1375
8-67
8-48
8-60
8-63
6-81
8-51
8-43
8-50
8-63
8-63
8-43
8-54
8-62
8-63
8-68
8-59
8-59
8-77
8-78
8-52
8-67
8-48
8-60
8-63
8-43
8-50
8-63
8-63
8'43
S'54
8-62
8-63
8-68
8-59
8-59
8-77
8-78
8-52
70 Pegasi ,
ISradley 3147.
W| 9
W 10
Bradley 3147 E
1 Piscium E
A Piscium E
w Piscium E
2 Ceti E
33 Pwiurn IE
f Andromedie E
jt Andromeda; E
2 Ursa; Minoris.... ,. E
1 2 UrsiB Minoris.
T) Celi .............
<t> Piscium
37 Ceti
Polaris
Polaris.
9-850
11-744
10-839
9-850
9-215
23. 23. 22-49
23. 28. 1 2 '08
10 9-394
6 | 9-850
9'
5
10
10
11-671
9-460
23. 28.
23- 34-
23- 36-
23- 53-
23- 57-
23- 59-
o. 41.
o. 50.
0-53-
4-56
13-06
26-97
53-09
29-28
18-14
26-93
58-97
23-12
58-79
59-06
5-22
1378
27-61
54-08
30-10 .
18-51
27-01 !
48-02
0. 53. 56-08 46-17
1. 2.50-32 51-29
' 7- 33'82 | 34-27
i. 8. 3870 39-64
i. 19. 2475 49'22
3J79
973
973
1377
22-26
36-04
2-54
38-56
26-92
35-40
59-9I
42-96
48-10
0-72
i. 19. 26-42 47-37 | 072
8-67
10-94
10-67
8-55
8-48
8-43
8-46
8-46
8-41
8-39
7-85
9'7
8-62
8-69
8-46
11-50
I3-35
1888 October 30. Observer L. Transit C.
S Aquarii
o Prgasi
55 Pegiisi
58 Prgasi
Bradley 3147.
Bradley 3147
21 Pisciiuu
<f> Pegasi
B.A.C. 8315
01 Piscium
30 Pixcium
53 Piscium
5 C'eti
34 Piscium
7 Pegasi
Bradley 1672 S.P.
Bradley 1672 S.P.
C Andromeda 1
9-940 22. 48. 35-08 ' 36-52 i 44-53
E 10
E 9
22. 59. 4-26
23. I. 14-82
,, 23. 4. 16-11
10-545 23.28.21-00
9-940
8-460
9-591
9-940
23- 28.
23- 43-
23. 46.
23- 49-
23- 53-
23- 56.
23- 59-
O. 2.
O. 4.
o. 7.
o. 13-
19-08
36-04
40-59
46-98
26-32
5-47
28-67
20-68
9-88
21-25
5-05
I5-74
17-03
1-63
0-41
37-18
41-36
47-96
2734
676
29-94
21-89
10-81
22-08
28-39
I3"'4
23-96
25-27
8-86
8-86
4574
49-90
56-46
36-03
15-36
38-54
30-41
I9'34
30-64
3734
o. 13.49-44 30-82 37-34
o. 41. 17-86 18-44 26-91
8-01
8-09
8-22
8-24
7-23
8'45
8-56
8-54
8-50
8-69
8-60
8-60
8-52
8-53
8-56
8-95
6-52
8-47
8-01
8-09
8-22
8-24
8-56
8-54
8-50
8-69
8-60
8-60
8-52
8-53
8-56
8-47
20 Ceti ] E
;u Andromeda; j E
2 Ursa; Minoris E
W
W
w
w
w
/Piscium I W
v Piscium I W
Polaris W
2 Ursre Minoris.
77 Piscium
TJ Ceti
33 Ceti
r/> Piscium .
Polaris
101 Piscium.
IT Piscium....
105 Piscium.
v Piscium ....
Arietis
A Arietis ...
9-940
8-421
8-554
9-940
10
9
9
9
9
9 1 ,,
9' ,.
10 j 11-130
10-072
9-940
0.47. 9-89
o. 50. 26-58
o. 54- i '57
O. 54. I'll
0. 59- 54-55
1. 2. 50-OO
I. 4. 40-74
' 7- 3379
i. ii. 54-31
i. 13. 12-57
i. 19. 39-82
i. 19.3771
i. 29. 4070
i. 33. 31-67
i. 35. 29-48
i. 48. 20-97
1.51.35-00
11-04
2676
47-11
47-18
55-61
51-38
41-84
34-42
55-39
!3 -I 3
49-88
45'94
41-51
4-13
32-44
30-48
21-65
35'6i
I9-S9
35-39
55-53
55-53
4-18
59-91
50-37
42-96
3 '92
21-58
59-88
59-88
49-92
12-48
41-11
38-92
30-16
4431
8-55
8-63
8-42
8-35
8-57
8-53
8-53
8-54
8-53
8-45
lO'OO
13-94
8-41
8-35
8-67
8-44
8-51
870
1888 November 9. Observer L. Transit C.
58 Pegasi
59 Pegasi.
<j> Aquarii
7 Piscium
96 Aquarii....
T Pegasi
v Pegasi
K Piscium
70 Pegasi
Bradley 3147.
9-940
9-196
4. 16-71
5. 58-36
8. 24-70
II. 14-99
13- 28-95
14- 59-50
19. 41-26
21. 4-77
23-23-15
28. 7-67
1 6 -86
58-52
25-02
15-20
29-26
59-49
41-25
S'oi
23-26
57-26
25-16
7-02
33-43
2374
3770
7-87
49-63
13-63
31-66
6-16
8-30
8-50
8-41
8-54
8'44
8-38
8-38
8-62
8-40
8-90
8-30
8-50
8-41
8-54
8-44
8-38
8-38
8-62
8-40
Bradley 3147....
ir Andromedie ..
S Andromedse...
B Ceti
f Andromeda;...
5 Piscium
20 Ceti
2 Urs.fi Minoris.
2 Ursa; Minotis.
9-259 23. 28. 7-28
9-940 o. 30. 48-87
o. 33. 15-20
0.37.5178
0.41.1872
o. 42. 46-69
O. 47. 11-20
o. 53. 54-85
8-112
8-084
0.53.5473
48-70
15-07
52-22
18-69
46-84
11-45
4675
46-88
6-16
56-79
23-14
0-50
26-87
54-87
19-56
54-57
54-57
9-62
8-09
8-07
8-28
8-18
8-03
7-82
7-69
October 26. Polaris W was observed on wire IX. Polaris E wai observed on wire I.
November 9. Bradley 3147 E was observed on wire I.
80
TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1838.
Star's Name.
s
1
i
Observed
Transit.
-
= !>!
sy|
Star's Name.
.1
31
Observed
Transit.
m
>>_
11*1
1888 November 9. Observer L. Transit C. continued.
37 Ceti....
/ Pisciuni .
v Pisciuni .
Polaris...
Polaris.
10
r
9-940
||
II
12-505
10-208
i- 8. 39-50 39-84
I- II.55-53 5574
i. 19. 16-20
1 3 '44
48-92
i. 19. i? 79 '49"67
48-09
3-9i
zi'57
57-62
57-62
8-25
8-17
8-13
8-70
7'95
8-25
8-17
8-13
i) Pisciuiii.
39 Arietis.
41 Arietis.
a Arietis ..
K 9
K 9
K 4
E 9
9-940, 1.25.23-98
2.41. 9-71
2.43. 18-58
2-45- I3-3I
24-03
9^9
18-49
32-25
17-87
2679
2I'6l
8-22
8-28
8-30
8-24
8-22
8-28
8-30
8-24
1888 November 13. Observer L. Transit C.
<t> Aquarii
7 Pisciuni
T Pegasi
v Pegasi
70 Pegasi
Bradley 3147.
Bradley 3147
1 Piscium
A Piscium
19 Piscium
21 Piscium
<(> Pegnsi
B.A.C. 8315
u Piscium:
2 Ceti
33 Piscium
5 Ceti
34 Piacium
Bradley 1672 S.P. .
Bradley 1672 S.P.
jSCeti
( Andromedae
S Piscium
fi. Andromedse
2 Ursfe Minoris....
77 Pisoium
i) Ceti
33 Ceti
<t> Piscium
37 Ceti
10
E
E; 9
E
E
E | 20
E 4
E 9
5! 9
E 9
E , 9
9-930
8-984
8-350
9-930
11-647
10-895
9'93
9-516
9-930
23. 8. 24-18! 25-26
23. n. 14-80: 1575
23. 14.59-16 59*0
23. 19.40-88 41-52
23. 23. 22-82 23-63
23. 28. 9-48 56-04
9 - l6
4-65
13-20
33-45
36-74
4I-OO
47-35
26-91
53-03
29-25
21-21
23. 28.
23- 34-
23- 36-
23. 40.
23- 43-
23. 46.
23- 49-
23- S3-
23- 57-
23- 59-
O. 2.
o. 4. 10-29
o. 13. 10-76
o. 13. 7-56
0.37-5I-05
o. 41. 18-06
o. 42. 46-01
o. 50. 26-82
0. 53- 57-94
o- 59- 54-94
1. 2.50-49
i. 4.41-29
i. 7-34-10
i. 8. 38-58
56-52
5-61
14-22
34-44
3778
4177
48-27
27-86
54-33
30-37
22-29
11-17
38-60
36-98
52-32
18-70
46-91
27-17
47-95
557
51-63
42-25
34-74
23-70
7-82
49-58
31-62
4-76
476
13-61
22'12
4978
56-34
I 35-92
1 2-41
38-44
30-30
19-24
43^4
0'47
26-85
54-85
35-32
53-89
4-14
50-35
42-94
48-07
8-12
7-95
8-02
8-06
7-99
8-72
8-24
8-00
7-90
7'93
7-84
8-01
8-07
8-06
8-08
8-07
8-oi
8-07
5-24
6-86
8-15
8-iS
7-94
8-15
5 '94
8-27
8-24
8-10
8-20
8-38
8-12
7-95
8-02
8-06
7-99
8-00
7-90
7-93
7-84
8-01
8-07
8-06
8-08
8-07
8-oi
8-07
8-15
8-15
7-94
8-15
8"-2 7
8-24
8-10
8-20
8-38
/Piscium .
i> Pisciuni .
Polaris...
Polaris
IOI Pisciuni .
IT Piscium....
105 Piscium.
v Piscium
/3 Arietis
\ Arietis
60 Ceti .
w
5 Ceti
7* Ceti
39 Arietis
41 Arietis
r) Eridani
c Arietis
a Ceti
p Persei
/3 Persei
8 Arietis
'( Arietis
Groombridge 2283 S.P
VV 10
W 9
W
W
w
w
w
I Trianguli j W 9
t Arietis W 9
? Ceti Vf 9
27 Arietis W 9
29 Arietis
Piazzi II. 123
v Arielis....
9-930
9-069
9-208
9-930
12 9-864
13. 1270, 13-29
19- 25-55! 49^9
. 19. 21-69
. 29. 41-04
31-
33-
3'6l
41-87
4'47
33-I5
30 84
22'M
5I-35-64, .
57. 20-52 21-56
2. 2. 47-761 48-23
2. 18.4285 4374
2. 22. 6'2I 7'11
. 35- 29-5*8
.48.21-37
2. 24.35-70 _
2 26. 40-18 41-00
2. 29. 50-19
2. 32. 21'54 22-26
2.33-
2-37-
2. 4 I.
2.43-
2.50.
2. 52.
2.56.
2-57-
3- o.
3- 5-
3- 8.
3- 12.
23-44
9-07
IS'M
50 'S6
42-89
I9-33
5524
48-27
7-68
22-09
16-09
3892
24-39
9-61
1 8 -68
43-57
20 26
8-39
22-78
3-90
21-57
5570
557
49-93
12-49
41-14
30-20
4435
29-77
56-24
5177
15-19
44-67
49-I5
59-29
30-51
32-69
17-88
26-82
0-17
5170
28-45
3'8o
56-80
16-69
31-06
8-40
8-28
6-41
' 8-18
8-06
8-02
7'99
8-09
8-09
8-02
8-21
8-01
8-03
8-06
8-18
8-15
8-16
8-25
8-30
8-27
8-14
8-19
8-13
8-19
8-22
8-2 3
8-30
8-28
7-64
8-40
8-28
8-06
8-02
7-99
8-09
8-09
8-02
8-21
8-01
8-03
8-06
8-18
8-15
8-16
8-25
8-35
8-30
8-27
8-14
8-19
8-13
8-19
8-22
8-2 3
8-30
8-28
November 13. Bradley 1672 S.P. E was observed on wire IX.
MEAN CLOCK KATE.
81
XIV. MEAN CLOCK RATE.
Forming now the means of each group of clock stars observed between reversals
of the instrument we get the results shown in the tables on pages 82 to 87. The
first five columns require no explanation. In the 6th column the results of columns
IV. and V. are corrected for systematic difference between the two positions W
and E. To obtain this correction the various groups were all reduced to O h
sidereal with clock rates, generally agreeing with those finally adopted on p. 92.
The means of the results W and E were then taken weighting according to the
number of stars in each group, and the differences of these means formed for each
day. These differences are given below ; and assigning weights to them by the
2,mn
formula
where m and n are the numbers of stars observed W and E
respectively on each day we find the mean systematic differences W and E (due
to lateral flexure, form of pivots, or other causes) to be
Clock slow W, Clock slow E,
Transit B.
-0"-023
Transit C.
+ 0-045
Clock Slow W. Clock Slow E.
Transit B.
Transit G.
Date.
W. E.
wt.
W. E.
We.
Sept. 30
8
0'12
24-
8
0-02
7
Oct. i
0-03
II
O'O3
3
3
+ 0-09
16
+ O'll
ii
5
O'OZ
25
+ 0-07
21
"
+ 0-19
16
+ 0-09
26
13
0-16
16
+ 0'4
25
H
0-14
18
+ 0-09
3
15
+ 0-07
18
+ O'OI
7
17
O'OI
23
+ 0'08
2 4
19
0-08
21
+ o - o6
3
2
o-ii
I I
0-09
IS
21
+ O'lO
21
+ 0-04
22
23
+ O'OI
18
o - O4
9
26
0-05
18
+ 0-17
6
27
0-04
27
+ O'lO
'4
3
+ 0-05
5
+ 0-14
i*
^N T ov. 9
+ 0-13
8
+ 0'20
ii
13
0-12
23
- 0-13
26
Weighted )
Mean /
0-023
3i9
+ '<H5
304-
GREENWICH OBSERVATIONS, 1899.
82 TELEGRAPHIC DETERMINATION OP LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
Thus for Transit B a correction of +0 8 '01 has been applied to W groups and
-0 8 -01 to E; and for Transit C a correction of --0 8 '02 to W and + 8 '02 to E
groups to form the numbers in column VI. of the following tables, which are
now considered comparable, and of which the daily mean is taken ; the differences
from this mean are shown in column VII. and are available for discussion of
clock rate.
Transit B. Paris Clock,.
Mean Clock Error.
Date.
Mean R.A. of
Group.
Number of
Stars.
Corrected.
Difference from
Mean.
W.
E.
h m
8
8
B
Sept. 30
20. 14
II
9'86
...
9'87
+ O-I2
20. 59
II
9-92
9'9 ^
+ 0-16
21.55
5
9-9I
9'92 + O-I7
23. 12
8
972 971 -0-04
o. 54
8
9'38
9'39 ~~ 0*36
I.J1
5
...
9-61
0*60 o' i c
22. 24
24,24
975
Oct. i
21. 8
8
8-I 5
8-17
+ 0-12
22. 38
17
8-02 8-00
0-05
22-9
8,17
8-05
Oct. 3
21.
12
475
477
+ 0-26
22.49
7
4-46
4'44
-0-07
o. 7
5
4-38
4-40
O'll
o-43
9
4-29 4-27 - 0-24
22. 52
17,16
4'5 i
Oct. 5
20. 57
13
1-56
1-57
+ 0-36
22.32
l|
1-30
1-29
+ 0-08
23-53
13
1-03
1-04
0-17
1.28
n
0-88
0-87
- o-34
2 3 .6
26,25
...
...
I'll
Oct. 1 1
22.
9
9-88
- 9-87
+ 0-25
23- 37
10
10-16
10-17
0-05
o. 38
6
10-14
10-13
o-oi
1.40
6
- i'39
10-40
0-28
23.44 15,16
...
10-12
MEAN CLOCK RATE.
Transit B. Paris Clock continued.
83
Mean Clock Error.
Date.
Mean It. A. of
Group.
Number of
Stars.
Corrected.
Difference from
Mean.
W.
E.
h m
8
8
,
Oct. 1 3
21.53
1 1
- 13-32
- I3-33
+ '3 l
23. 18
6
~ 1378
- 1377
-o- !3
23-54
9
- 13-67
- I3-68
0-04
I. 2
8
- I3-94
- I3-93
0-29
23.24
14,20
...
...
- 13-64
Oct. 14
21. 56
7
- 15-83
15-82
+ 0-07
23. I
18
- 1579
15-80
+ 0- 7
O. 10
9
16-03
16-01
0-14
i- 7
3
16-14
16-12
-0-25
23. 16
19,18
...
...
- 15-88
Oct. 1 5
21-53
ii
- 17-70
- 17-69
+ 0-24
22.55
20
- I7-99
1 8-00
0-07
23.46
6
18-13
18-12
0-19
22.45
17,20
...
- '7-93
Oct. 17
21.57
15
21-76
- 2177
+ 0-23
*3. o
12
- 21-95
...
- 21-94
+ 0-06
23-55
I I
...
- 22-17
22-18
0-18
0.48
9
22-27
22-26
0-26
23- 13
21,26
. 22-00
Oct. 19
2i-55
ii
- 25-46
- 25-47
+ 0-24
22.52
18
- 25-68
- 25-67
+ 0-04
23.56
6
- 25-88
0-18
o. 29
5
26-07
26-06
-0-35
o-43
3
- 25-9
- 25-9'
O-2O
23. 5
23,20
...
-25-71
Oct. 20
23. 8
12
- 27-93
- 27-94
+ 0-I4
o. 48
IO
28-25
...
28-24
0-16
23- 53
IO, 12
...
28-08
Oct. ^ i
22. 4
9
30-16
- 30-15
+ 0-06
22. 52
17
30-06
- 30-07
+ 0-14
23.56
8
- 30-14
- 30-13
+ 0-08
0.35
6
30-82
- 30-83
0-62
I- 3
3
30-16
- 30-15
+ 0-06
23-I7
20,23
30-21
84 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
Transit B. Paris Clock continued .
Mean Clock Error.
Date.
Mean R. A. of
Group.
Number of
Stars.
Corrected.
Difference from
Mean.
W.
E.
h IN
B
B
8
Oct. 23
22. 6
9
...
- 33-66
- 33-67
+ 0-13
23. o
IO
- 3373
- 3372
+ o-io
*3-49
5
- 33-9
- 33'9'
- 0-13
i. ii
4
...
- 33-95
- 33-9 6
0-12
i. 40
9
- 34-05
...
- 34-04
0-22
23.43 '9> l8
- 33-84
Oct. 26
22. 9
6
- 40-84
- 40-85
+ o-io
22.39
9
-40-91
40-90
+ 0-05
23.58
8
...
- 40-93
- 4'94
+ o-oi
0.51
IO
- 4I-05
- 41-04
0-09
'34
3
- 41-07
41-08
O-I3
23-43
i9. T 7
...
- 40-95
Oct. 27
21. 50
13
-42-14
- 42-13
+ 0-18
23- 7
!6
- 42-23
- 42-24
+ 0-07
0.51
13
- 42-40
- 42-39
- 0-08
2. I
12
...
- 42-50
-42-51
O'2O
23.52
26,28
...
- 42-3'
Oct. 30
o. 4
3
- 47-43
- 47-45
O-O4
o-33
2
- 47'27
- 47-25
+ 0-16
i-39
7
- 47-46
- 47-44
'3
i. 4
9.3
- 47-41
Nov. 9
0.45
5
- 73-72
- 73'6i
- 7373
+ 0-26
I. IO
4
- 74-oi
- 74-02
0-03
2.58
7
-74-14
-74-I3
0-14
3.26
i
- 74-iS
- 74''6
- 0-17
' 55
I2 >5
...
- 73-99
Nov. 1 3
22. 19
22
- 83-86
-83-85
+ O'ZI
o. 17
7
- 84-04
- 84-05
+ o-oi
I. IO
2
- 84-44
...
- 84-43
-0-37
2.26
'5
-84-33
- 84-34
0-28
o. 5
24,22
84-06
MEAN CLOCK RATE.
85
Transit C. Greenwich Clock.
Mean Clock Error.
Mean R. A. of
Group.
Number of
Stars.
Corrected.
Difference from
Mean.
W.
E.
b m
8
8
8
Sept. 30
20. 51
6
...
5'86
.5-88
+ 0-06
0. 22
7
5-82
5-80
0-02
i.l|
i
5'59
5-6,
O'2I
22.55
7,7
5-82
Oct. i
20. 58
7
574
572
0-24
22. 42
13
5-98
6'oo
+ 0-04
0.
7
6-16
6-14
-f- 0-18
22.35
H.I3
5-96
Oct. 3
22. 36
12
5-87
5-85
+ 0-02
o. 17
9
5- 7 6
5-78
0-05
I. 4
2
5-90
5-88
+ 0-05
23. 28
'4,9
5-83
Oct. 5
21.
4
5-89
5-91
o-oo
22. 42
16
5'97
...
5'95
+ 0-04
23-49
6
5-81
5-83
- 0-08 :
I. 2
7
5-90
...
5-88
- 0-03
1
22. 41
23,20
5-91
Oct. 1 1
21. 7
7
7-20
7-22
0-04
21.48
7
7-29
7-27
+ O'OI
23- 7
13
7-20
7-22
0-04
23- 54
ii
7-20
...
7-18
- 0-08
:
o. 42
9
...
7-25
7-27 + o-oi
. . '
1.31 ;
5
7-58
7-56 + 0-30
23. 20
23,29
7-26
Oct. 1 3 ,
21.15
2
7-67
7-69
+ 0-06
zi-49
10
7-56
...
7-54 . . - o-io
23- 4
17
7-58
7-60 ' 0-03
i
23-55 |
13
7-71
7-69 + 0-06
' 4
9
7-65
7-67 + 0-04
\
23. 19
23,28
7-63
86 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
Transit C. Greenwich Clock continued.
Mean Clock Error.
Date.
Mean R.A.of
Group.
Number of
Stars.
Corrected.
Difference from
Mean.
W.
E.
h m
8
8
8
Oct. 14
21. II
4
7-66
7-68
0-04
21.53
10
7-76
774
+ O-O2
22.55
IS
7-67
7-69
O-OJ
o-37
9
777
...
775
+ 0-OJ
I.
7-62
7-64
0-08
1.39
8
...
7-71
773
+ O'OI
23-23
19,28
...
7-72
Oct. 1 5
21-34
i
7-61
7-63
O-IO
22.48
8
774
...
7-72
o-oi
23-55
5
775
Til
+ 0-04
23- 7
8,6
773
Oct. 17
21.48
ii
8-09
8-11
+ 0'O2
23- 5 13
8-16
8-14
+ 0-05
23-52
8-00
8-02
O-O7
0.45
3
8-13
...
8-n
+ 0-02
i. 7
5
8-05
8-07
O-O2
1.36
9
8-10
8-08
o-oi
23.42
25,24
...
8-09
Oct. 19
21.54
>5
8-48
8-46
+ OM4
22.53
15
8-34
8-36
+ 0-04
23-53
4
8-22
8-20
0-12
o. 50
15
8-22
8-24
0'08
'37
2
8- 25
...
8-23
O'Og
"
23. 26
31,3
...
8-32
Oct. 20
21. 30
12
8-39
8-41
O'O3
23.17
II
8-37
8-35
O-O9
0.54
IO
8-55
8-57
+ 0-13
23- 7
11,22
...
8-44
Oct. 21
22. 8
8
8-66
8-64
O'OI
22. 56
'4
8-66
8-68
+ o-oi
23.56
13
8-71
8-69
+ 0'02
o. 46
9
8-63
8-65
O-O2
23.14
21,23
...
...
8-67
MEAN CLOCK RATE.
87
Transit G. Greenwich Clock continued.
Mean Clock Error.
Date.
Mean R.A. of
Group.
Number of
Stars.
Corrected.
Difference from
Mean.
W.
E.
h Q)
8
s
i
Oct. 23
22.58
13
8-40
8-38
0-03
o. 9
7
...
8-44
8-46
+ 0-05
23- *3 '3,7
...
8-41
Oct. 26
23-59
6
8-73
8- 7 i
+ 0-07
2. 3
7
8-56
8-58
0-06
i. 6
6,7
8-64
Oct. 27
22. 11
4
8-60
8'62
+ 0-06
23. I
'5
8-60
8-58
+ O-O2
o. 4
7
8-45
8-47
O'Og
i. 7
3
8-59
...
8-57
+ O'OI
23.24
1 8, 1 1
8-56
Oct. 30
22. 58
4
8-14
8-16
- 0-32
23.56
9
8-57
8-55
+ 0-07
o. 46
3
8-55
' 8-57
+ 0-09
i- 7
6
8-53
8-51
+ 0-03
1-38
6
8-51
8-53
+ 0-05
o. 30
15,13
8-48
Nov. 9
23. 13
9
8-44
8-42
+ 0-13
-39
6
8-13
8-15
0-14
i. ii
3
8-18
8-16
-0-13
2.24
4
8-26
8-28
O'OI
o. 27
12,10
8-29
Nov. 1 3
23.15
5
8-03
8-05
0-07
23.50
ii
8-00
...
7-98
0-14
o. 58
ii
8-21
8-23
+ o-ii
2. 2
H
8-09
8-07
0-05
2.52
1 1
...
8-24
8-26
+ 0-14
I.I5
*5, 2 7
8-12
88 TELEGRAPHIC DETEKMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
From the differences in column VII. we can find the clock rate for the evening,
which a preliminary discussion showed was generally different for the Paris clock from
the daily rate deduced by comparing one night's observations with the next. For this
investigation, let r be the residual for a group of n stars whose sidereal time is t, and T
the mean sidereal time of all the observations on that night, x the clock rate. Then by
the usual rule of " Least Squares,"
x x S[w (*-T) 2 ] = Z[n (* - T) r].
In the following table the values of x are given in the 2nd and 6th columns ;
and the mean hourly rates deduced by comparing each night's observations with the
next are given in the 5th and 8th columns. It will be seen that the differences are
sensible and systematic, and in the case of the Paris clock are doubtless due to the
considerable changes of temperature during the day to which the clock was exposed.
The case of the Greenwich clock will be referred to presently. On comparing notes with
the French observers it was found that they too obtained evening rates differing from
the average daily rate, and their results are added in the 3rd and 7th columns : the
4th column will be explained hereafter.
PAKIS CLOCK.
GREENWICH CLOCK.
Date.
Hourly Clock Rate from
Evening Observations.
Adopted
Hourly
Clock Rate.
Mean
Hourly
Rate for
the Day.
Hourly Clock Kate from
Evening Observations.
Mean
Hourly
Rate for
the Day.
English.
French.
English.
French.
s
i
a
8
Sept. 30
Oct. I
3
5
0-087
o-ioo
0-128
- 0-157
0-082
0-069
0-130
0-085 -
0-085
0-099
0-144
0-071
- 0-073
0-069
O-O3I
+ 0-137
O-O2I
O-OI4
- 0-047
O-OI3
0-006
0-OO5
4- 0-006
0-003
4- 0-003
ii
'3
H
'5
17
'9
20
21
0-131
- 0-185
O- 1 I 2
- 0-I83.
0-2OO
0-181
-0-147
0-067
0-124
0-114
0-104
O-IIO
0-106
0-060
0-099
-0-155
0-113
- 0-175
- 0-147
-0-153
- 0-144
0-105
- 0-075
0-093
0-091
0-083
0-078
- 0-094
0-091
4- 0-036
+ 0-038
4- 0-008
4- 0-056
- 0-015
0-079
+ 0-042
4- 0-006
+ 0-007
0-O2I
+ O-OI5
o-oio
O-OI7
o-oio
0-050
4- 0-008
4- 0-004
4. o-ooo
+ 0-008
+ 0-005
+ 0-005
+ o-oio
23
26
27
30
Nov. 9
'3
r- 0-106
0-065
0-090
0-039
0-142
0-122
0-083
0-015
0-016
0-140
0-094
0-040
0-08 1
0-028
- 0-133
0-131
0-098
- 0-057
0-070
O-IIO
0-107
4- 0-067
0-063
+ 0-095
0-063
+ '55
+ 0-033
0-014
0-085
4- 0-006
+ 0-003
0-003
o-ooi
o-ooi
O-OO2
[The figures in Columns 5 and 8 have been obtained from the Table on p. fli.]
MEAN CLOCK RATE.
89
It will be seen that there are considerable differences between the results of the
English and French observers. Part of these differences is no doubt accidental, as
the probable error of a determination of rate from 2 or 3 hours' observations is large.
The apparently systematic differences are possibly due to change of personal equation
during the evening, although the following mean differences for the groups do not seem
to bear out this view.
Paris Clock.
Greenwich Clock.
Observers. Difference.
Observers.
Difference.
-
8
i
ist Group (Sept. 3O-Oct. 5) .
B-HT + 0-030
D-L
0-036
2nd Group (Oct. 1 1-2 1 )
D-L + 0-074
B-HT
O'Oiy
3rd Group (Oct. 23-Xov. 13)
B-HT + 0-017
D-L
0-027
For the final rate of the Paris clock it was considered best to take the mean of
the two results without further investigating these somewhat curious differences, for
the effect of the clock rate on the longitude is very small. These means are accordingly
given in column IV. In cases where no result for rate was obtained by the French
observers, half the mean differences tabulated above for the difference between English
and French results for each group, has been applied to the English result to form the
adopted rates in column IV. The reason for this change of rate during the evening is
no doubt the great variation of temperature to which the French clock was exposed.
It was in the observing room where the French transit was mounted, and the weather
during the operations underwent several changes.
But it is somewhat remarkable that the differences between clock rate during the
evening and from day to day should be so large for the Greenwich clock. This clock is
the standard sidereal clock of the observatory, and is kept in a basement where the varia-
tion of annual temperature is only a few degrees, and the daily variation is insensible.
On careful examination we are led to the conclusion that there is nothing of a systematic
character in these differences, and that they must be regarded as accidental. It will be
seen from the following table that the mean of the arithmetical differences between the
results of the English and French observers is nearly twice as great as the mean
arithmetical correction to daily rate indicated by both conjointly : and this is just the
result we should obtain if these differences are purely accidental, for in that case the
probable errors of E F and E + F would be the same, and the probable error of the
Trf -U TT
latter would be twice that of D if D, is sensibly accurate. If, then, the
GREENWICH OBSERVATIONS, 1899.
m
90 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
differences are accidental, we should expect the mean error of E F to be nearly twice
"T1 t "C 1
that of D, which is just what we find.
The columns in the following table sufficiently well explain themselves, the rate D is
taken from column VII. of the table on page 92 :
Date.
Hourly Rate for Evening.
Hourly Rate for
the Day (D.).
E-F.
E + F D
~2~
English
Observations = (E. ).
French
Dbservations=(F.).
Sept. 30
8
0-03I
8
- 0-047
s
+ 0-008
8
+ 0-016
- 0-047
Oct. i
+ 0-137
0-013
+ 0-005
+ 0-150
+ 0-057
3
O-O2I
O-OO6
o-oo i
0-015
0-013
5
O-OI4
O-OO5
+ 0-005
0-009
0-015
Oct. 1 1
+ 0*036
+ 0-007
+ O-OO7
+ 0-029
+ 0-015
'3
+ 0-038
0-021
+ O-OO7
+ 0-059
+ O-OO2
H
+ 0-008
+ 0-015
+ 0-007
0-007
+ 0-005
15
+ 0'056
...
+ 0-006
...
"
'7
0'015
o-oio
+ 0-006
0-005
O-OI9
'9
O'O79
0-017
+ 0-004
0-062
0-052
20
+ 0-042
o-oio
+ 0-005
+ 0-052
+ O'OII
21
+ 0-0.06
0-050
+ 0-006
+ 0-056
0-028
Oct. 23
+ 0-067
+ o-oo i
...
26
0-063
...
o-ooo
...
...
27
- 0-039
+ 0-033
+ 0-002
0-072
. 0-005
3
+ 0-095
0-014
o-ooo
+ 0-109
+ 0-040
Nov. 9
0-063
0-085
+ o-oo i
+ O-O22
- 0-075
13
+ 0-055
+ 0-006
o-ooi
Mean....
Mean without )
regard to sign J
+ 0-049
+ 0-032
+ 0-025
0-006
0-047
0-028
MEAN CLOCK RATE.
91
It was finally decided, therefore, to deduce the hourly rate of the Greenwich clock
from the daily rate determined from Transit-Circle observations, about which great care
is taken. These adopted rates are given on page 92.
As a check on the general accuracy of these adopted rates, the evenings were
selected when there had been two exchanges at a considerable interval, and the
difference of the two clock rates was determined on each evening from a comparison of
these two sets of signals. The resulting differences of hourly clock rate are given in the
2nd column below ; in the 3rd column are the differences of adopted clock rates, and in
the 4th column the difference of the mean daily rates, found by comparing one night's
observations with the next, which, in the case of the Paris clock, differs from that
adopted.
Differences of Hourly Clock Rates.
Greenwich Paris.
Adopted
From Signals.
(from Evening
Mean for the Day.
Observations).
8
8
Oct. 5
+ 0-154
+ 0-149
+ 0-073
ii
+ 0-091
+ 0-106
+ 0-083
13
+ 0-132
+ 0-162
+ 0-090
4
+ 0-154
+ O-I2O
+ 0-094
'7
+ 0-116
+ 0-153
+ 0-087
'9
+ 0-124
+ 0-157
+ O-O9 I
21
+ o-ioi
+ O'HI
+ 0-102
Nov. 1 3
+ OM2O
+ 0-130
+ 0-105
Mean
+ 0-124
+ 0-136
+ O-Ogi
The accordance of the results in columns II. and III. is sufficiently good to justify the
adoption of clock rate from evening observations in the case of the Paris clock.
XV. FORMATION OF MEAN CLOCK ERROR AT O h SIDEREAL
ON EACH NIGHT.
Applying the adopted rates to the mean results in column VI. of the tables on pp.
82 et seq. for the interval elapsed since O h sidereal, which is chosen as a convenient
point of reference rather than the mean time of the observations, we get the following
errors for the clocks on each night. The adopted rates for the French clock are repeated
from p. 88 for convenience of reference. The rates for the Greenwich clock are those
adopted from the Transit-Circle observations, for which the mean daily rate is carefully
considered.
92 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
MEAN ERRORS AND RATES OF THE CLOCKS AT O h LOCAL SIDEREAL ON EACH
DAY PROM OBSERVATIONS OF STARS.
Date.
Paris Clock.
Greenwich Clock.
Mean Sidereal
Time of Star
Observations.
Adopted Clock
Slow at O h
Sidereal.
Hourly
Losing Rate.
Mean Sidereal
Time of Star
Observations.
Adopted Clock
Slow at O h
Sidereal.
Hourly
Losing Rate.
hr m
B
a
hr m
a
a
Sept. 30
22 24
9'6i
0-085
22 55
5-83
+ 0-008
Oct. i
22 9
7 '9
0-085
22 35
5'97
+ O-OO5
3
22 52
4-40
0-099
23 28
5-83
O'OOI
5
23 6
i -08
-0-144
22 41
S^ 2
+ 0-005
Oct. 1 1
23 44
10-15
-0-0 9 9
23 2O
7 -26
+ 0-007
13
23 24
-'373
-0-155
23 19
7-64
+0-007
H
23 17
-15-96
0-II3
23 23
772
+ 0-007
'5
22 45
18-15
-0-175
23 7
774
+ 0-006
i?
23 13
22-12
-0-I4 7
23 4*
8-09
+0-006
*9
23 5
-25-85
--I53
23 26
8-32
+ 0-004
20
23 53
28-10
-0-144
23 7
8-44
+ 0-005
21
23 i 17
-30-29
0-I05
23 '4
8-67
+ 0-006
Oct. 23
23 4 6
-33'86
-0-094
23 23
8-41
+ O'OOI
26
23 43
-40-96
0-040
i 6
8-64
O'OOO
27
23 52
-42-32
o'oSi
23 24
8-56
+ O'OO2
30
1 4
-47'38
0-028
o 30
8-48
O'OOO
.Nov. 9
1 55
-7373
-0-133
o 27
8-29
+ O-QOI
13
o 4
-84-05
0-131
i '5
8-12
O'OOI
XVI. EXCHANGES OF SIGNALS.
Denoting by F and E the French and English Chronographs at Paris, and by F'
and E' the French and English Chronographs at Greenwich, the programme for a
complete night was as follows :
ist Group of Clock Stars.
ist Set of Exchanges (complete), viz. :
FandF
F and E'
E and E'
EandF
2nd Group of Clock Stars.
3rd Group of Clock Stars.
2nd Set of Exchanges (half), viz. :
F and F'
E and E'
4th Group of Clock Stars.
EXCHANGES OF SIGNALS. 93
This was an ideal programme which was necessarily modified according to circum-
stances. On cloudy nights the programme of exchanges was not extended beyond the
black line. It was not considered necessary to repeat all four exchanges in the second
set, as the differences, being entirely due to the imperfection of automatic apparatus,
were expected to be small, and that part of them which was systematic could be
sufficiently studied from the first set. It will presently be shown, however, that these
differences are quite comparable with the errors due to clock rate.
Any one of the above exchanges was conducted in the following manner.
Greenwich sends 10 trial signals.
,, a continuous signal (see below).
Paris sends 10 trial signals.
,, a continuous signal (see below).
[So far the operations are merely preliminary.]
Paris sends 20 signals (ist set).
Greenwich sends 20 signals (ist set).
(2nd set).
signals for pen-parallax.
Paris sends 20 signals (2nd set).
signals for pen-parallax.
The continuous signals were sent to allow of the observation of deflection in
the galvanometer, and the adjustment of the rheostat until a proper current was
obtained.
In the following tables the mean of the observed times of the signals sent from Paris
are given on the left of the page, the first set in columns II. and III. and the second
set in columns V. and VI. Those sent from Greenwich are placed on the right of the
page. The clock errors are computed from the table on p. 92, no correction for personal
equation being applied ; and the longitude deduced from each set in the fourth lines of
columns IV., VII., X., and XIII., is thus affected with the difference of personal equation
of the two observers (which changes sign when they are interchanged), and with the
time of transmission of the electric current.
Half the difference of the means for the signals sent from Paris and Greenwich
respectively represents the time of transmission.
94
TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
APPARENT DIFFERENCE OF LONGITUDE GIVEN BY EACH EXCHANGE OF SIGNALS.
(Uncorrected for Personal Equations of the Observers and Time of Transmission.)
Signals sent from Paris.
Signals sent from Greenwich.
Paris
Chronograph.
Greenwich
Chronograph.
Differ-
ence.
Paris
Chronograph.
Greenwich
Chronograph.
Differ-
ence.
Paris
Chronograph.
Greenwich
Chronograph.
Differ-
ence.
Paris
Chronograph.
Greenwich
Chronograph.
Differ-
ence.
Mean of Signals
h m s
21. 59. 58-99
+978
23. 19. 14-17
-08
+9-67
23. 30. 58-46
-06
+9-65
23.S2-27-33
-06
+9-62
21. 48. 3I-6I
'03
+8-09
22. O. 25*14
O'O2
+8-07
22. II. 28-65
-06
+8-05
22. 26. 20-30
-5
+8-0 3
23. 15. 57-24
-07
+4'47
23. 30. 8-25
-06
+4 '45
h m s
21. 50. 42-30
-02
+5-81
23- 9-S7-3I
+ '4
+5-82
23. 21. 41 '62
+ 'OS
+S-83
23. 43. 10-54
-06
+5-83
21. 39. 13-24
-7
+5-96
21. 51. 670
00
+5-96
22. 2. 10'lS
-oi
+5- 9 6
22. 17. 1-89
-08
+5-96
23. 6.35-18
+5-83
23. 20. 46-08
+ ^3
+5-83
m a
9. 16 69
-06
+3'97
1
h m s
22. 8. 1472
-08
+977
23. 23. 2-30
-08
+9-66
23.34.41-44
-06
+9-65
23.56. 5-58
-06
+9-62
1
21. 52. 28-98
+8 -SI
22. 3. 40-26
O'O2
+8-07
22. 14. 51-68
-06
+8-05
22. 29. 42-90
"5
+8-03
' 23. 19- 36-49
-07
+4-47
388 Septe
h m s
21. 58. 57-98
'O2
+5-8i
23- 13- 45-45
+ "04
+5-82
23. 25. 24-60
+ -05
+5-83
23. 46. 48-79
-06
+5-83
888 Octo
21. 43. io'6i
-07
+5-96
21. 54. 21 '8l
oo
+5-96
22. 5. 33-22
-oi
+5^
22. 2O. 24-50
-08
+5-96
1888 Oct
23. 10. 14-43
-07
+5-83
23. 24. 26-19
+ -03
+5-83
mber 3<
m
9. 16-74
-06
+3-96
).
h m s
22. I. 6-42
-06
+978
23. 2O. 12-46
-08
+9-67
23. 31. 58-06
-07
+9-65
23- 53- 24-93
-07
+9-62
21. 49. 28*21
_ -03
+8-08
22. I. 19*44
-03
+8-07
22. 12. 23-81
- -07
+8-05
22. 27. I5-II
-08
+8-03
23. 16. 53-66
-07
+4H7
23.31- 2-42
-07
+4'45
h m H
21.51.49-68
-02
+5-8I
23. 10. 55-50
+ -06
+5-82
23. 22. 41-11
+ -06
+5-83
23. 44. 8-05
-04
+5-83
21.40- 975
-06
+5-96
21. 52. 0-87
oo
+5-96
22. 3. 5-27
oo
+5-96
22. I?. 56-60
"07
+5-96
23- 7-3 I '4i
-06
+5-83
23. 21. 4O'l6
+ "O2
+5-83
m s
9- 16-74
- -04
+3'97
h ni s
22. 2. 14-78
-06
+97S
23. 21. KW
-oS
+9-67
23-33- 0-50
-07
+9-65
23. 54-21-83
-o?
+9-62
21. 50. 23-33
-03
+8-08
22. 2. I4'62
-03
+8-06
22. 13. 21'66
-07
+8-04
22. 28. 1 1 -32
-08
+8-01
23- 17- 52-59
-07
+4-47
23. 31. 56-36
-07
+4-45
h m s
21. 52. 58-03
-02
+5-81
23. 11. 58-07
+ -06
+5-82
23- 23- 43-56
+ -06
+5-83
23. 45. 4-96
-04
+5-83
21. 41. 4-88
-06
+5-96
21. 52. 56-07
oo
+5-96
22. 4. 3-12
OO
+5-96
22. IS. 52-80
-07
+5-96
23. 8.30-36
-06
+5^3
23. 22. 34-10
+ -02
+5-83
m s
9- 1675
-04
+3'97
Parallax of Pens
Clock slow
FF
9. 20 -60
9. 20-64
9. 20-67
9. 20 '68
Mean of Signals ..
9. 16-86
"12
+3-85
9. 16-85
-12
+3-84
9. 16-96
-14
+3-85
9. 16-96
-14
+3-85
Parallax of Pens
Clock slow.
FE'
9. 20-59
9- 20-57
9. 20-67
9. 20-67
Mean of Signals
9. 16-84
-II
+3-82
9. 16-84
-ii
+3-82
9- 16-95
"'3
+3-82
9. 16-94
'13
+3-82
Parallax of Pens
Clock slow.....
EE'
9- 20-55
9- 20-55
9. 20-64
9. 20-63
Mean of Signals
9- 1679
oo
+379
9- 6'79
oo
+379
9. 1 6 -88
-3
+379
9. 16-87
- -03
+379
Parallax of Pens
Clock slow
EF'
9. 20-58
9. 20-58
9. 20-64
9. 20-63
Mean of Signals
9- i8'37
+ -04
+2-13
her 1.
9- i8'37
+ -04
+2-12
9. 18-46
+ -03
+2-12
9- 18-45
+ -03
+2-12
Parallax of Pens
Clock slow
FF
9- 20-54
9. 20-53
9. 20 -6 1
9. 2O'6O
9- 18-44
'02
+2-II
9. 18-45
-O2
+2 'I I
9- 18-57
-03
+2-II
9- 18-55
- -03
+2'IO
Parallax of Pens
FE'
9- 20-53
9- 20-54
9. 20-65
9. 2O-62
Mean of Signals
9. 18-47
- -05
+2-09
9. 18-46
- -0 S
+2-09
9- 18-54
- -07
+2-09
9- i8'54
- -07
+2-08
Parallax of Pens
EE'
9. 20-51
9 20-50
9. 20-56
9- 20-55
Mean of Signals
9. 18-41
+ -03
+2-07
9. 18-40
+ -03
+2-07
9. I8-5I
-oi
+2-07
,9- 18-52
-01
+2-05
Parallax of Pens
EF'
9. 20-51
9. 20-50
9. 20-57
9. 20-56
Mean of Signals
9. 22-06
'00
-1-36
ober 3.
9. 22-06
oo
-1-36
9. 22-25
- -<
-1-36
9. 22-23
"OI
-1-36
Parallax of Pens
Clock slow
FF'
9. 20-70
9. 20-70
9. 20-88
9. 20-86
Mean of Signals
9. 22-17
-09
-1-38
23- 33- 48-36
-06
+4'44
9. 22-17
- -09
-1-39
9. 22-26
-09
-1-38
9. 22-26
-09
-1-38
FE'
9. 20-70
9. 20-69
9. 20-79
9. 20-79
APPARENT DIFFERENCE OP LONGITUDE GIVEN BY EACH EXCHANGE OF SIGNALS.
95
Signals sent from Paris.
Signals sent from Greenwich.
Paris
Chronograph.
Greenwich
Chronograph.
Differ-
ence.
Paris Greenwich
Chronograph. Chronograph.
Differ-
ence.
Paris
Chronograph.
Greenwich
Chronograph.
Differ-
ence.
Paris
Chronograph.
Greenwich
Chronograph.
Differ-
ence.
Mean of Signals
h 111 s
23.40.27-13
-04
+4'43
23. 51. 15-30
- -05
+4-4I
22. 0. 1377
-06
-H'37
22. 13. 19-95
-06
+1-33
22. 25. 46-30
- -09
+I-3I
22. 36. 39-47
-09
+ 1-28
o. 15. 26-20
-07
+1-04
O. 26. 2O'II
- -07
+ I-O2
o. 42. 43-01
'07
+0-98
o. 50. 9-00
-08
+0-96
h m s
23. 3 1 - 4'97
+ -02
+5-83
23-4I. S3 '22
'08
+5-83
21. 50. 48-53
'08
+5-9I
22. 3. 54-62
-oi
+5-91
22. l6. 2O'95
+ -oi
+5 '9 1
22. 27. 14-13
'06
+5 '9 1
o. 6. 0-65
-09
+5-92
o. 1 6. 54-48
-04
+5-92
0.33- *TZ 2
-04
+5 "92
o. 40. 43-32
-10
+5-92
m s
9. 22'l6
- '06
1-40
1888 C
h m s
23. 44. 14-57
0-04
+4-43
23- 54- 43 "83
- '05
-t-4'41
1888 Oc
22. 3-55-20
-06
+I- 3 6
22. l6. 52-58
-06
+1-33
22. 29. 8'47
-09
+ I-30
22. 56. 38-93
-09
+ 1-23
1888 Oct
o. 18. 57-12
- -07
+1-03
o. 29. 35-20
0*07
+I-OI
o. 39. 12-71
-07
+0-99
o. 54. 18-84
-08
+0-95
ctober 3.-
h m s
23. 34. 52-40
+ -02
+5^3
23.45.2174
-08
+5-83
tober 5.
21. 54. 29-97
-08
+5-9I
22. 7. 27-24
-oi
+5-9I
22. 19.43-10
+ -oi
+5'9>
22. 47- 13-53
+5-91
ober 5. i
o. 9- 31-55
-09
+5-92
%
0. 20. 9-57
-04
+5-92
o. 29.47-04
- -04
+5-92
o. 44. 53-15
"IO
+5-92
contin
111 8
9. 22-17
-06
I -40'
ued.
h m s
23. 41. 20-58
-08
+4H3
23. 52. 1773
-07
+4-41
xchange.
22. I. 10-88
-06
+1-36
22. 14. 24-07
- -07
+i-33
22. 26. 41-50
-09
+I-30
22. 37. 52-I6
'JO
-fl'28
Exchange.
o. 1 6. 24-25
- -07
+1-04
o. 27. 11-26
- -07
+ I-O2
o. 40. 58-79
-09
+0-98
o. 51. 5-29
- -09
+0-96
h m s
23- 31- 58-35
+ -02
+5-83
23- 42- 55-57
-07
+5-83
21.51.45-58
-,- -07
H-5'91
22. 4. 58-67
oo
+5-9I
22. 17. 16-05
+ -oi
+5-9I
22. 28. 26-78
- -07
+5-9I
o. 6. 58-63
- -09
+5-92
o. 17. 45-67
-07
+5-92
o. 31- 33-07
-05
+5-92
o. 41- 39'55
-09
+5-92
Ill S
9- 22-23
-io
1-40
h m s
23. 42. 19-60
-08
+4-43
23. 53. 14-81
-07
+4-4I
22. 2. 6-88
-06
+1-36
22. 15. 17-99
- -07
+ I'33
22. 27. 36-27
- -09
+1-30
22. 38. 57-45
'IO
+1-27
o. 17. 19-31
- -07
+1-04
o. 28. 3-03
-07
+I'OI
o. 40. 5-34
+0-98
o. 52. 0-63
-09
+0-96
h m s
23- 32- 57 "3 6
+ -02
+5-83
23- 43- 52-66
-07
+5-83
, *
21. 52. 41-58
"07
+5-91
22. 5. 52-60
oo
+5-9I
22. 1 8. 10-82
+ -oi
+5-9I
22. 29. 32-05
-07
+5-9I
0. 7-5370
- -09
+5-92
o. 18. 37-45
-07
+5-92
o. 30. 39-62
- -05
+5 '92
o. 42. 34-89
-09
+5-92
m
9. 22-24
-10
1-40
Parallax of Pens
Clock slow
EE'
9. 20-70
9. 20-71
9. 20-73
9- 20-74
Mean of Signals
9. 2 2 '08
+ -03
I-42
9. 22-09
+ -03 :
1-42
9. 22-16
oo
-1-42
9. 22-15
oo
1-42
EF'
9. 20-69
9. 20-70
9. 20-74
9- 2073
Mean of Signals
9. 25-24
+ -02
4"54
First E
9- 25-23
4- -02
-4'55
9- 25-3
+ -oi
-4-55
[9.25-30
+ -oi
-4-55
Parallax of Pens
Clock slow
FF'
9. 20-72
9. 20-70
9. 20-76
9. 20-76
9- 25 '33
- '05
-4-58
9-25-34
'5
-4-58
9- 25-40
-4-58
9- 25-39
-07
-4-58
FE'
9. 20-70
9. 20-71
9- 2075
9- 20-74
9- 25'3S
-io
4-60
9- 25-37
'IO
-4-61
9- 25-45
-10
4-61
9- 25-45
*IO
4-61
Clock slow
EE'
9. 20-65
9. 20 '66
9- 2074
9- 20-74
9- 25'34
- "93
4 '63
9. 25-40
-4-68
9- 25-38
_ -03
-4-63
9. 25-40
- -03
4-64
Parallax of Pens
Clock slow
EF'
9. 20 -68
9. 20-69
9. 20-72
9. 20-73
9- 25-5S
+ -02
4-88
Second .
9- 25-57
+ -02
-4-89
1 9.25-62
+ -02
4-88
9- 25-61
+ -02
-4-88
Parallax of Pens.,,
FF'
9. 20-69
9. 20-70
9. 20-76
9- 2075
9. 25-63
'03
4-90
9.25-63
- -03
4-91
9- 25-59
oo
4-90
9.25-58
oo
4-91
FE'
9. 20-70
9. 20-69
9. 20-69
9. 20-67
9- 25-69
-03
4'94
9- 25-67
- -03
4-93
9. 25-72
-04
4'94
9.25-72
-04
-4-94
Parallax of Pens....
Clock slow
EE'
9. 20-72
9. 2071
9- 20-74
9. 2074
9- 25-68
+ -02
4-96
9- 25-69
+ -02
4-97
9-2574
'OO
4-96
9- 2574
'00
-4-96
Clock slow __
EF'
9. 20-74
9. 20-74
9. 20-78
9. 2078
96
TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
Signals sent from Paris.
Signals sent from Greenwich.
Paris
Chronograph.
Greenwich
Chronograph.
Differ-
ence.
Paris
Chronograph.
Greenwich
Chronograph.
Differ-
ence.
Paris
Chronograph.
Greenwicli Diner-
Chronograph.' ence.
Paris
Chronograph.
Greenwich
Chronograph.
Differ-
ence.
I
Mean of Signals
h m s
22. 4.49-45
- '5
9'96
22. 38. 31 -38
-04
lO'OI
22.48. 28-92
-04
10-03
23. 2. 1676
- 'OS
10-05
o. 48. 59-50
- 'S
10-23
i. i. 28-81
-04
10-25
21.57. 8-97
I3"4i
22. 8. 43-52
-07
I3-44
22. 41. 40 - 6o
*o6
-I3-S3
22. 55. 49'84
h m s
21. 55. 11-82
- -03
+ 7-25
22. 28. 53-74
-07
+ 7-25
22. 38. 5I-26
'06
+ 7-25
22. 52. 39-08
- -0 3
+ 7 - 25
o. 39. 21-69
- -09
+ 7-26
o. 51. 50-99
-06
+ 7-27
21.47.27-50
-03
+ 7-63
21. 59. 2-O3
-07
+ 7-63
22. 31. 59-04
-08
+ 7-63
22. 46. 8*24
-04
+ 7-63
m s
9-37-63
-O2
I7-2I
1888 Oct
h m s
22. 8.2579
- 'OS
- 9-96
22. 42. 2-05
-04
IO'O2
22.51.5173
-04
10-04
23. 24. 43-23
'OS
IO-O9
888 Octo
0-52.47-37
- -05
10-24
i. 5. 1-38
-04
10-26
1888 Ocl
22. I. 15-39
-08
13-42
22. 13- 5-35
-07
13-45
ober 11.
h m s
21. 58. 48-15
- -0 3
+ 7-2S
22. 32. 24-41
- -07
+ 7-25
22. 42. 14-08
-06
+ 7-25
23- 15- 5^8
'OS
+ 7-25
her 11.
o. 43- 9'55
-09
+ 7-26
o. 55- 23-59
-06
+ 7-27
,ober 13.
21. 51.33-91
"3
+ 7-63
22. 3. 23-87
-07
+ 7'6 3
22. 37. 5I-II
- -08
+ 7-63
22. 50. 15-21
-04
+ 7-63
First I
in s
9- 37-64
-02.
I7-2I
Ixchange.
h m s
22. 5. 50-34
-06
- 9-96
22. 39. 24-58
-06
lO'OI
22. 49. 22-23
IO-O3
23. 3. 10-30
"06
10-05
Exchange
o. 50. 9-81
-04
10-23
I. 2. 24-01
-06
1O-25
]xcbange.
21. 58. 9-82
-08
13-41
22. 10. 376
-08
I3-44
22. 42. 56-57
-06
-13-53
22. 56. 59^3
-06
-I3-57
h m s
21. 56. 12-62
"O2
+ 7-25
22. 29. 46-83
-06
+ 7-25
22. 39. 44-54
-06
+ 7-25
22. 53- 32-52
- ^3
+ 7-25
0.40. 31-89
-07
+ 7-26
o. 52. 46-07
-06
+ 7-27
21. 48. 28-24
-O2
+ 7-63
22. O. 22'2O
- -06
+ 7-63
22. 33. 14-83
-07
+ 7-63
22. 47. 17-94
"3
+ 7-63
1)1 8
9-3772
-04
17-21
h m s
22. 6. 50-31
-06
9^6
22. 40. 19-50
-06
IO'02
22. 50. 18-36
'06
IO-O3
23. 4. 0-49
-06
10-06
0.51. 5-83
-04
10-23
i. 3. 20-27
-06
10-25
21. 59. 22-OO
-08
13-42
22. II. I5'4O
'08
13-44
22. 44. 52-43
-06
-I3-53
22.58. 7-56
'06
-I3-57
h m s
21. 57. 12-59
-02
+ 7-25
22. 30.41-76
-06
+ 7-25
22. 40. 40-66
-06
+ 7-25
22. 54. 22-7I
- -0 3
+ 7-25
o. 41. 27-92
-07
+ 7-26
o. 53. 42-32
-06
+ 7-27
21. 49. 40-42
'02
+ 7-63
22. 1.33-85
'06
+ 7-63
22. 35. IO'69
-07
+ 7-63
22. 48. 25-85
-03
+ 7-63
m s
9.37-72
-04
I7-2I
Parallax of Pens. _,_.
FF'
9. 20-40
9. 20-4I
9- 20-47
9- 20-47
Mean of Signals ....
9.37-64
+ -03
17-26
9- 37^4
+ -03
-17-27
9-3775
oo
17-26
9- 37-74
'oo
-17-27
Parallax of Pens
Clock slow ..
FE' ..._
9. 20-41
9. 20-40
9. 20-49
9. 20-47
Mean of Signals .
Parallax of Pens...._...
Clock slow..... ....
9- 37-66
+ -02
17-28
9. 37-65
+ 'O2 .
-I7-29
9- 37-69
oo
17-28
9.37-70
"OO
+17-28
BE'
9. 20-40
9- 20-38
9. 20-41
9. 20-42
Mean of Signals .._
9- 37-68
-02
17-30
9- 37-75
-02
17-34
9- 3778
- -03
17-30
9-3778
-03
17-31
Parallax of Pens _...
Clock slow
EF'
9. 20-36
9- 20-39
9- 20-45
9- 20-44
]
9-37'Si
+ -04
17-49
Second
9- 37-82
+ -04
17-50
9.37-92
+ -3
17-49
9- 37-9I
+ -03
17-49
Parallax of Pens
FF' . ._ .... .
9. 20-36
9- 20-36
9. 20-46
9- 20-45
Mean of Signals
9- 37-82
+ -02
-17-52
9- 3779
+ -02
-I7-53
9- 37-94
oo
-17-52
9- 37-95
oo
-17-52
Parallax of Pens _...
KE'.. ..
9- 20-32
9. 20-28,
9. 20-42
9- 20-43
9-41-47
- - 5
21-04
First I
9- 41 "48
- 'OS
21-05
9.41-58
-06
21-04
9.4f5S
-06
2 1 '05
Parallax of Pens
Clock slow
IF'
9- 20-38
9. 20-38
9. 20-48
9. 20-47
Mean of Signals
9- 41 '49
oo
21-07
9.41-48
oo
21-08
9-4I-56
-02
2 1 - O7
9-4I-55
-O2
2I-O7
Clock slow
FE'
9. 20-42
9. 20-40
9. 20-47
9. 20-46
9. 41-56 22. 47. 32-67
+ -02 ; -06
21-16 13-54
9.41-56
+ -02
21-17
9- 4174
+ -oi
21 - l6
9.4174
+ -oi
2I'l6
Parallax ot Pens
Clock slow
EE'
9. 20-42
22. 59. 56-80
- -05
-I3-57
9. 20-41
9- 20-59
9- 20-59
9. 41-60
-01
21*19
9-4>-59
-01
21'20
9.41-69
- -03
21-20
9.41-71
- -03
21 '2O
Parallax of Pens
i ~ 'S
-I3-56
Clock slow
EF 1
9. 20-40
9 20-38
9. 2O'46
9. 2O'48
APPARENT DIFFERENCE OF LONGITUDE GIVEN BY EACH EXCHANGE OF SIGNALS.
97
Signals sent from P.iris.
Signals sent from Greenwich.
Paris
Chronograph.
Greenwich
Cbra>ogra|ih.
Differ-
ence.
Pttis
Chronograph.
Greenwich
I 'iinmngi-aph.
Differ-
ence.
Paris
Chronograph.
Greenwich
Chronograph.
Differ-
ence.
Paris
Chronograph.
Greenwich
Chronograph.
Differ-
ence.
1888 October 13. Second Exchange.
Mean of Signals.
Parallax of pens.
Clock slow
FF' .
Mi'iin of Signals .
Parallax of pens.
Clock slow....
EH'.
h m i
0.44. 31-41
'07
-I3-S5
o. 59. 24-18
13-88
h m rt m s
0.34.49-56 9.4I-85
-05 -02
+7-64 21-49
o. 49. 42-32
- -07
9. 20-34
9. 41-86
+ -02
9- 20'3
O.5I.I2'l6 0.41.30-29 9.41-87
-07 '5 '02
13-86 +7-64! 21-50
9- 20-35
o. 46. 37 -83
-08
1.21.44-211 i. 12. 2*30 9. 41-91 ' i. 2. 1 1 '68
- -05
1 3 '94
-07 + -02 ! '07
+7-65 -21-59 13-89
9- 20-34
h m s
0.36.55-91
- 'OS
o. 52. 29-69
-06
9.41-92
- -05
-21-49
9. 20-38
9.41-99
-01
21-54
h m s
o. 48. 52-52
-08
-I3-8S
i. 14. 0-57
'7
-13-92
o. 39. I0 '59
"3
+7-64
i. 4. 18-55
-06
+7-65
9-4I-93
-5
21-49
9- 20-39
9. 42-02
-oi
-21-57
9. 20-44
Mean of Signals 22. 49. 44-23
Parallax of pens ' '06
Clock slow 1-5-83
Moan of Signals.
Parallax of pens.
Clo:k slow....
KK'.
Mi- in of Signals
Parallax of pens
Clock slow
KK' .
Mean of Signals
Parallax of pens
Cloi-lc slow
1888 October 14. First Exchange.
22.40. 0-29! 9. 43'94 ! 22. 58. 23-26 22. 48. 39-30 ! 9. 43-96 j! 22. 51. 8-72
-07 -4- -oi ' -06 -07 ! -f- -oi I -07
+77i 23-54 15-84 +77' 23-55 r 5" 8 3
23- 47- 33-25
-06
I5-94
o. 3. 50-84
-08
I5-97
9- 20-41 j
23.37.49-23 9.44-02 23.52.59-21
-06 -oo
+7-72 23-66;
23. 54- 6-77
-06
-I5-95
23-43-
9. 20-36
9. 44-07
-06 -02
+772 j 23-69
o. 42. 6'6i o. 32. 22-43
'04 j -08
16-04! +7'72
EL-".
9. 20-36
o. 17. 274
-08
-15-99
-06
+772
o. 7. 18-65
-06
+772
9. 44-18 o. 46. 24-57 ! o. 36. 40-35
+ '04 1 "04 '08
23761 16-05 +772
9. 20-46
9. 20-42
9- 44-04 23. 49. 5-03
OO I! '06
I5-94
9. 20-37
9- 44-09
-02
2371
9. 20-36
9. 44-22
+ -04
2377
9- 20-49
o. 7. 2-42
-06
o. 43. 22-75
-07
16-04
22. 41. 24-72
'07
+7-71
23. 39. 20-89
-06
+7-72
23. 57. 18-22
-06
+7-72
o. 33- 38-45
-07
+772
9. 44-00
oo
-23-54
9. 20-46
9. 44-14
oo
23-66
9- 20-4
9. 44-20
oo
23-69
9. 20-51
9- 44-3
oo
2376
9- 20-54
22. 52. 21-82
-07
-I5-83
22.42.37-81 9.44-01
"07 ' -oc
+771 -23-54
9. 20-48
23. 50. 48-20 23. 41. 4-07 9. 44-1
'06 i '06 ; 'oo
-I5-94 ( +7-72 -23-66
o. 8. 8-28
-06
-15-98
o. 44. 22-76
"7
16-04
j 9. 20-47
23. 58. 24-08 9. 44-20
'06 -oo
+7-72 -23-70
9. 20-50
o. 34. 38-45 9. 44-31
'07 'oo
+7-72 -23-76
9- 20-55
1888 October 14. Second Exchange.
Mi-ail of Signals .
Parallax of pens.
Clock slow....
FF',
Mean of Signals .
Parallax of pens.
Cloi-k slow
KK' .
I. 4- 43"3J
'06
16-08
o. 54. 59-08
-08
+773
i. 17. 36-65 i. 7. 52-39
-04 J -07
16-10 +773
9- 44-23
+ -02
23-8I
9. 20-44
9- 44-26
+ -03
-23-83
9. 20-46
i. 8. 58-52
-06
16-09
i. 23. 9-06
-04
o. 59. 14-26
-08
+773
9- 44-26
+ -02
23-82
9. 20-46
1. 13. 24-79 9. 44-27
-07 + -03
+7-73 23-84
I 9. 20-46
1888 October 15.
i. 5.51-13! 0.56. 6-83 9.44-3 ' 7- 2-60
-5
-16-08
i. 19. 11-04
-06
i6'io
-08
+773
i. 9. 26-67
- "OS
+773
+ -03!
23-81 I
9. 20-52
9- 44-37
-oi
-23-83
9- 20-53
,
16-09
i. 20. 48-81
- -06
16-11
o. 57. 18-29
-08
+773
i. ii. 4-43
- -05
+773
9- 44-3
9- 20-5
9- 44-38
-01
-23-84
9- 20-53
Moan of Signals .
Parallax of pens .
Clock siow
KK' .
o. M. 6"o6 1 o. i. 19-61
-07
18-18
-07
+7-74
9. 46-45 i o. 15. 23-23 ! o. 5. 36-75
oo !
- -07!
25-92, 18-19
9. 20-53
"07
+7-74
9. 46-48
oo
-25-93
9- 20-55
O. 12. 14-81 | O. 2. 28-25 9- 46'56
. -. ..f ~.
- -07!
-18-19
-06 -oi
+7-74 -25-
9. 20-62
i f
0.13.31-181 o. 3.44-58 9.46-60
07
18-19
-06 "oi
+774J 25-'
9. 20-66
1888 October 17. First Exchange.
Mi-an of Signals .
I'arallax of pens.
Clock slow
22. 12. l8'53
'06
II 85
FF' .
22. 2. 28-08
-0 9
+8-OS
9- 5 '4 5
+ -03
29-93
9- 20-55
22. 17. 29 26
-06
2I-87
22. 7.3879i 9- SO^ ! 22. 13. 45-54 ! 22. 3.55-02! 9. 50-52 : 22. 14. 59'53 j 22. 5. 9'OO I 9.50-53
-09 + -03
+8-08 -29-95
9- 20-55
- -06
-21-86
-09
+8-08
-06
21-86
9. 20-61
-09
+8-08
+ -03
29-94
9. 20-62
QRBENWICH OBSERVATIONS, 1899.
TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
Signals sent from Paris.
Paris Greenwich
Chronograph. Chronograph.
Differ- Paris i Greenwich
euee. Chronograph. Chronograph
Signals sent from Greenwich.
Differ- : Paris j Greenwich
ence. [Chronograph. .Chronograph.
Differ-
euce.
Paris Greenwich | Differ
Chronograph. Chronograph. cncr.
Mean of Signals .
Parallax of pens.
Clock slow
FE'
Mean of Signals .
Parallax of pens.
Clock slow...,
EE'.
Mean of Signals.
Parallax of pens .
Clock slow
EF'
Mean of Signals .
Parallax of pens.
Clock slow
EE'
Mean of Signals.
Parallax of pens.
Clock slow...
Fi".
Mean of Signals .
Parallax of pens.
Clock slow..<
FF'.
Mean of Signals .
Parallax of pens.
Clock slow
FE',
Mean of Signals .
Parallax of pens.
Clock slow
EE' ...
Man of Signals .
P.iVallax of pens.
Clock slow
EF'.
Mean of Signals .
Parallax of pens.
Clock slow
FF'.
1888 October 17. First Exchange. continued.
h in H
22.39. 7'02
- '05
21'92
22. 50. 58-37
- -08
-21-95
23. 3. 54-29
'08
21-98
h m s
22. 29. 16-54
- -05
+8-08
22.41. 7-85
- "OS
+8'o8
22. 54. 373
'ID
+8-oS
9- 5 "48
oo
30 'oo
9- 20-4
9- 50-5 2
-03
-30-03
9. 20-46
9- 50'56
-f- '02
3O-06
9. 20-52
h m s
h m a
22.43- 53 '45 22. 34- 2-97
-05 -05
-21-93 +8-08
22. 55. 34 '46 22. 45. 43-94
-08 -05
21-96 +8-08
23. 8. 22'lS \ 22. 58. 31-62
'08 '1C
2I-99J +8'08
m s
9- 5 '48
"OO
30-01
9- 20-47
9- 5o;52
-30-04
9- 20-45
9. 50-56
+ -02
30-07
9. 20-5I
h m s
22. 40. 3I-8l
-07
21-92
22. 52. I2'39
-09
-21-95
23- 5- 9-56
-09
-21-99
h m s
22. 30. 41-22
9- 50-59
-05 ; . -02 !
30-00 ;
9. 20-57
22.42.21-74 9.50-65
-05 -04
+8-08 30'O3
1 9-20-58
22. 55. 18-92
-IO
+8-08
9- 50'64
+ -oi
30-07
9. 20-58
h m s
22. 41. 51-71
-07
21-9.5
22.53.36-03
-09
21-96
23. 6. 21 -12
-09
-21-99
h m H
22. 32. I'll
+8 '08
-05
+8 -OS
22. 56. 30-47
TO
+8-08
9. 50-60
-02
30-01
9. 20-57!
-04
30-04
9. 20-56
9. 50-65
+ -oi
30-07
9- 20 '59
1888 October!?. Second Exchange.
o. 35. 28-50
-08
22-21
o. 53- 34 '81
-06
-22-25
o. 25. 37-79
-06
+8-09
9. 5071
-02
30-30
9. 20-39
o. 39- 34-66
'08
22 '02
o. 29. 43-94 | 9. 5072
-06 -02
+8-09 3o-3r
0.43.44-08! 9.50-731 0.57.57-21
'to + '04
+8-09 30 '34
9. 20-43
-06
22-26
o. 48. 6-47
-10
+8-10
9- 5074
+ "04
30-36
9. 20-42
o- 36. 39-53
-09
22-21
o. 54-46-34
-06
22-26
o. 26. 48-68 9. 50-85 o. 37. 55-16 I o. 28. 4-29
+S-0 9
-9
+8-09 30-30; 22'2I
9- 50-87
-04
9- 20-51
0.44.55-52, 9.50-82 0.55.47-66 0.45.56-83
04
+8-10. -30-36
9- 20 -50,
-06
22-26
-ioi + -04
+8-10 1 30-36
9. 20-51
22. 53. 56-44
-06
-25-69
2 3-
-06
-25-71
23. 17. 6-37
-07
25-74
22. 44. 2 'O2
oo
+8-31
22. 55. 50-
23. 7. 12 00
- ^5
+8'3 2
2 3- 57- 24-39 23. 47. 29-83
-07 -oo
-25-84 +8-32
-06
34-00
9. 20-36
1888 October 19. First Exchange.
22. 58. 21-40! 22. 48. 26-95 9' 54- '45 : 22 - 55 I5'2o
9- 54-34
-oi
34-03
9- 20-30
9- 54-37
-02
34-06
-06
25 -69
oo '06
+8-32 -34-01
-07
25-68
9. 20 '29
-07
34-i6
9- 20-33
23. io. 12-30
-06
-25-72
23. 21. 20-54
-07
- 2 575
o. 6. 14 51
-07
-25-87
9. 20-38 :
oo -07
22.45.20-69: 9-54'5i 22.56.27-17 22.46.32-67 9.54-50
oo -07
+8-32 34-01
9. 20-42
+8-32
34-00
9. 20-44
-07
25-69
23. 0.17-95 9-5435 23. 7. 4-05 22.57. 9-60 9.
"05 -01 '07 '05 '02
+S- 3 2 -3404 -25-72 +8-32' -34-04
9. 20-30
23. ii. 26 16 9. 54-38
-05 : -02
+8-32! -3407
9. 20 29
23- 56. I9-93 9- 54-58
oo '07
+8-32, -34-19
9. 20-32
9- 20-39
23. 8. 19-42 22. 58. 24-99 9- 54-43
'07 '05 02
25-72 +832, -34-0+
23. 18. 20-45 23.
-08
-2574!
8. 25-97 9. 54-48 | 23. 19. 35-21
-05 -03 . -08
+8-32 34-06
9- 20 39
23- S 8 . 37-33 ' 23- 48. 4270 9- 54 63
25-85 +8-32 34 17
9- 20-38
-25 75
9- 20-37
r
3- 9-40-73' 9- 54-48
- -05, - -03
+8-32, 34-07
9- 20-38
o. 4.11-11 23.54 16-47 9-54'64
-07 -f -oi -ob
-25-86 +8-32 -34-18
9- 20 38
1888 October 19. Second Exchange.
o. 49 15-37
o. 39. 20 77
9. 54-60 j 0.53.48-011 0.4353-39 9.54-621 0.50.39-27' 0.40.44-60! 9.54-671 0.51.49-29; 0.41.54-62. 9-54-67
-oi i -06 - '05 i -oi -06 . -04 '02 ' '06 ; -04 -02
oi
-34-29!
9. 20 '30 I
-06
-25-99
-05
+8-32 34-31
9. 20-30
-25-98
+8-32 34-30
9- 20-35
-25-98
+8-32 34-30
.9- 20-35
APPARENT DIFFERENCE OF LONGITUDE GIVEN BY EACH EXCHANGE OF SIGNALS.
99
Signals scut from Paris. Signals sent from Greenwich.
Paris Greenwich Differ-
Chronograph. Chronograph. ence.
Paris Greenwich
Chronograph. Chronograph.
i
Differ-
ence.
Paris Greenwich
Chronograph. Chronograph.
Differ-
cnce.
Paris
Chronograph.
Greenwich
Chronograph.
Differ-
ence.
Mean of Signals
b m s
i. 'i. 0-69
-06
26-01
23. 59. 21-62
- -03
28-10
o. 20. 5 1 -48
-04
28-15
o. 37. 18-64
-08
28-19
o. 50. 8-41
-08
28-22
22. 52. 28-41
- -03
-30-17
23. 3. 48-24
- -03
30-19
23. 15. 27-69
- -07
30-21
23. 55. 48-31
- -08
30-28
I. 21. 41-36
"3
3'43
h in s
o. 51. 6'ii
- -05
+8-32
23. 49. 24-77
-06
+8-44
o. 10. 54-65
-07
+8-44
o. 27. 21-73
-07
+8-44
o. 40. 11-41
-07
+8-44
22. 42. 29-18
"OO
+8-66
22. 53. 49-10
-06
+8-66
23. 5.28-52
'07
+8-66
23. 45. 48-93
oo
+8-67
i. ii. 41-96
-oi
+8-68
1888 C
in s
9- 54-58
-oi
34 '33
9. 20-24
ctober 19
h m s
i. 5. 18-46
-06
26-02
o. ii. 27-50
-03
28-13
o. 25. 17-96
-04
28-16
o. 41. 44-39
-08
28-20
0.59. 1-17
-08
28-24
1888 Oct
22. 57. 15-37
30-I8
23. 8. 24-78
- -3
30-20
23. 19. 57-82
"07
30 '22
o. o. 16-09
- -08
-30-29
1888 Octo
I. 26. 2"l6
-3
3"44
Seconc
h in a
o. 55- 23-88
'05
+8-32
1888 Octc
o. i. 30-61
-06
+8-44
o. 15. 21-13
"7
+8'44
o. 31.47-47
-07
+8-44
o. 49. 4-15
-07
+8-44
ober 21.
22. 47. 16-13
oo
+8-66
22. 58. 25-64
-06
+8-66
23. 9. 58-64
-07
+8-67
23. go. 16-69
oo
+8-67
ber 21.
i. 16. 2-69
-oi
+8-68
Exchai
m a
9. 54-58
-oi
-34-34
9. 20-23 I
ige. cant
h m a
I. 2. 13-92
"07
26-01
o. o. 3976
-04
28-10
O. 22. l6'IO
-04
28-15
o- 3 8 - 35-42
-08
28-19
0.51.37-87
-08
28-22
xchange.
22. 53. 50-07
-04
30-18
23. 5- 13-01
-04
30-19
23. 16. 44-01
-08
30-21
23. 57- 6-14
-09
30-28
Exchange.
i. 22. 54-59
-04
-30-43
inued.
h m s
o. 52. 19-23
-0 4
+8- 3 2
23. 50. 42-86
-07
+8-44
0. 12. 19-17
"7
+8-44
o. 28. 38-40
- -07
+8-44
o. 41. 4079
-06
+8-44
22. 43. 50-77
oo
+8-6?
22. 55. 13-76
'06
+8-66
23. 6.4470
-06
+8-66
23.47. 6-68
oo
+8-67
i. 12.55-11
-oi
+8-68
m a
9. 54-69
- -03
-34-33
9. 20-33
h m s
I. 3.31-69
- -07
26-01
o. 1.4775
-04
28-10
o. 23. 3272
-04
28-16
o. 39. 52-24
-08
28-19
o. 52.51-91
-08
28-22
22. 54. 58-04
-0 4
30-18
23- 6.3375
-04
30'20
23. 18. 8-52
-08
30-22
23. 58. 14-25
-09
30-29
i. 23. 57-12
-04
3 -43
O ID I
o. 53.37-00
-04
+8-32
23. 51. 50-83
-07
+8-44
0- 13- 3579
-07
+8-44
0.29. 55-21
"07
+8-44
o. 42. 54 '82
-06
+8-44
22. 44- 58-74
oo
+8-66
22. 56. 34-50
-06
+8-66
23. 8. 9-22
-06
+8-66
23. 48. 14-78
oo
+8-67
i. I3.57-65
'OI
+S-6S
Ill S
9- 54'69
-3
3433
9. 20-33
EK'
9. 56-85
+ -3
-36-54
ber 20.
9- 56-89
+ -03
-36-54
9. 56-90
+ -3
-36-54
9- 56-92
+ -03
-36-54
Clork slow
FF' .
9. 20-37
9- 56-83
+ -03
-36-59
9- 20-35
9- 56-83
+ -03
36-60
9- 20-39
9- 56-93
+ -03
-36-59
9. 20-41
9- 5 6 '93
+ -03
26-60
Mean of Signals
Clock slow
FE'
9. 20-27
9. 20-26
9- 20-37
9. 20-36
Mean of Signals
9. 56-91
'01
36-63
9. 56-92
-oi
-36-64
9- 57-02
-oi
-36-63
9-57-03
-oi
-36-63
Clock slow
EE'
9. 20-27
9. 57 'oo
'01
36-66
9. 20-27
9- 57-02
"01
36-68
9- 20-38
9- 57-o8
-02
-36'66
9- 20-39
9- 57-09
-02
36-66
Clock slow
EF'
9- 20-33
9- 20-33
9. 20-40
9. 20-41
Mean of Signals
9- 59-23
-3
-38-83
First E
9. 59-24
"3
- 3 8-8 4
9- 59-30
-04
-38-85
9- 59-3
-04
-38-84
FF
9. 20-37
9- 20-37
9. 20-41
9. 20-42
Mean of Signals
9- 59-14
+ -03
-38-85
9- 20 '32
9- 59-14
+ -03
-38-86
9 20-31
9- 59-25
+ -02
- 3 8-8 S
9. 20-42
9- 59-25
+ -02
38-86
9. 20-41
Clock slow
FE'
Mean of Signals ..*
9- 59-I7
oo
-38-87
9- 59">8
'OO
-38-89
9- 59-3I
"02
-38-87
9- 59-30
'02
-38-88
EE'
9. 20-30
9. 2O'29
9. 20-42
9. 20-40
9- 59-38
-08
-38-95
9. 59-40
'OS
-38-96
9. 59-46
-09
-38-95
9- 59'47
- -09
-3896
KF' .
9- 20-35
9. 20-36
9. 20-42
9. 20-41
Mean of Signals ....._...
9- 59-40
-02
39'"
9. 20-27
Second
9- 59-47
-02
-39-12
9- 59-48
-3
-39-11
9- 20-34
9- 59 '47
-03
39'!'
I'loclt slow
FF' _
9- 20-33
9- 20-33
100
TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
Signals sent from 1'aris.
Signals sent from Greenwich.
Paris
Chronograph.
Greenwich
Chronograph.
Diticr-
enc,r.
Paris
Chronograph.
Greenwich
Chronograph.
Differ-
ence.
Paris
Chronograph.
Greenwieh
Chronograph.
Diflfcr-
enue.
Paris
Chronograph.
Greenwich
Chronograph.
Differ-
ence.
Mean of Signals
1) 111 s
i. 33- I9-33
-07
3 '45
o. 2. 59 '82
- '5
-33-87
o. 16. 57*46
-06
33-90
o. 31. 26-15
-08
33-92
O. 49. 28'12
-09
-33-95
23. 26. 54-35
- -0 9
40-94
23- 44- 33- 8 2
- -08
40-95
o. 40. 28-16
-08
-40-99
i. 10.44-57
-08
41 - oi
23. II. 11-07
-08
42-25
ll 111 S
I. 23. 19-88
-07
+8-68
23. 52. 56-52
-06
+8-41
o. 6. 54-20
-06
+8-41
O. 21. 22'95
-06
+8-41
o. 39. 24-69
-08
+8-41
23. 16.43-83
+ -02
+8-64
23. 34. 23-32
+ -02
+S-6 4
o. 30. 17-69
-03
+8-64
I. o. 34-21
-04
+864
23. o. 59-12
+ 'O2
+8-56
1888 C
111 H
9- 59-45
oo
39-I3
9. 20-32
)ctobcr 21
h in
I. 37.4I-89
-0?
30-46
o. 7. 57-92
^5
-33-S9
o. 25. 17-25
-06
-33-91
o. 40. 5675
-08
-33-93
I. 2. 10-33
-09
33-97
23. 32. O'lg
-09
40-94
23. 49. 36-80
'OS
-40-95
o. 45. 2-81
-08
40-99
1. 15. 9-41
-08
41-01
L888 Octo
23. 27. 50-23
-08
42-28
Seconc
h m s
I. 27. 42-42
'07
+8-68
1888 Octx
23- 57- 54'6i
"06
+8-41
o. 15. 14-01
-06
+8-41
o. 3- 53 "3 6
-06
+8-41
o. 52. 6-89
-08
+8-41
1888 Oct
23. 21. 49-68
+ -02
+8-64
23. 39. 2630
+ -02
+8-64
o. 34- 52-33
-03
+8-64-
i. 4-58-96
-04
+8-64
>er 27. 1
23. 17. 38 24
+ -02
+8-56
Excluu
111 8
9- 59-47
oo
-39-14
ige. cont
ll 111 S
I. 34. 39-40
-08
30-45
o. 4. 1677
-06
-33-8
o. 18. 11-64
-07
33-90
o. 32. 44-35
"IO
-33-92
o. 50. 47-58
-io
33'95
23. 28. 1 1 '04
- -09
40-94
23.45. 51-41
-10
40-95
o. 41. 40-09
-09
40-99
I. II. 59-21
-10
41-01
change.
23. 21. 50-38
-09
42-27
tutted.
ll 111 H
I. 24. 39-80
-07
+8-68
23- 54- i3'42
-04
+8-41
o. 8. 8-26
^5
+8-41
0. 22. 40-89
-06
+S- 4 I
o. 40. 44'lo
- -c6
+8-41
23. 18. 0-47
+ -03
+8-64
23- 35- 4077
+ -02
+8-64
o. 31. 29-56
-04
+8-64
i. i. 48-63
-04
+8-64
23- " 38-39
+ -02
+8-56
in s
9- 59-6o
-oi
-39-I3
h 111 s
! 35- 56-54
-08
-30-46
o. 5-37-89
-06
-33-88
o. 19. 29-88
-07
33-90
o. 34. 0-42
-io
33-92
o. 52. 7-56
'IO
33-95
23. 29.49-69
-09
-40-94
23.47.33-59
-io
-40-95
o. 42. 57-83
-09
40-99
ll 111 S
1. 25. 56-94
-07
+S-6S
23- 55- 34-53
-04
+8- 4 i
o. 9. 26-50
- 'OS
+8-41
o. 23. 56-97
-06
+8-41
o. 42. 4-07
-06
+8-41
23. 19. 39-12
+ -03
+8-64
23. 37. 22-93
+ -02
+8-64
o. 32.47-30
-04
+8-64
I. 3. I'20
-04
+8-6 4
23. IS 7^4
+ -02
+8-56
m s
9- 59-6o
-oi
39-I4
Parallax of pens
Clock slow.. .
EE'
9. 20-33
9. 20-46
9- 20-45
10. 3-30
+ -oi
42-28
)ber 23.
10. 3-31
+ -oi
42-30
to- 3^5
-02
42-29
io. 3-36
-I )2
42-29
Parallax of pens
Clock slow
FF'
9. 21-03
9. 21 -O2
9- 2I'O4
9 . 21-05
Mean of Signals
10. 3-26
oo
42-31
10. 3-24
oo
42-32
io. 3-38
-02
42-3I
io. 3'3> s
-Q2
-42-3 1
Parallax of pens
Clock slow
FE'
9. 20-95
10. 3 -20
-02
-42-33
9. 20-92
1. 3-39
'02
42-34
9- 21-05
io. 3-46
- -04
-42-33
9- 21-05
io. 3-45
-0 4
42-J3
Mean of Signals
Parallax of pens .
Clock slow
EE'
9- 20-85
9. 21-03
9. 21 -09
9. 2 1 '08
Mean of Signals .
1. 3-43
-oi
42-36
10. 3-44
-01
-42-38
io. 3-48
-0 4
42-36
io. 3-49
-04
42-36
Parallax of pens
Clock slow
EF' . .
9. 2i - o6
9.21-05
9. 2 1 -08
9. 21 -eg
Mean of Signals
10. 10-52
-II
49-58
9. 20-83
10. 10-50
-10
49-59
ober 26
10. 10-51
'II
-49-58
9. 20-82
10. 10-50
-io
49-59
io. 10-57
-12
-49-58
9. 20-87
io. 10-64
-12
49-59
io. 10-57
"12
49'5^ s
9. 20-87
io. 10-66
'12
49-59
Clock slow
EF'
M'*fu) of Signals
Parallax of pens
FF'
9. 20-81
9. 20 -8 1
io. 10-48
- -05
-49-63
9. 20-93
9- 20 95
Mean of Signals
!O. 10-47
- -05
49-63
io. 10-53
- 'OS
49-63
io. 10-53
-05
49 63
Parallax of pens
Clock slow.
EE'
9. 20-79
9. 20-80
9. 20-85
9- 20-85
10. 10-36
-04
-49-65
io. 10-45
-04
-4965
io. 10-58
-06
49-65
1. 13. 11-78
-10
41 -oi
23. 25. 19-66
-09
42-27
io. los.S
-06
-49-65
Clock slow
FE'
9. 20-67
9. 20-76
9. 20-87
9. 20-87
to. 11-95
-10
-50-81
Mrs! K.\
io. 1 1 -99
-to
50-84
io. 1 1 -99
-II
-50-83
10. I2'02
'I I
5 - S 3
Parallax of pens
KF'
9 21-04
9- 21-05
9. 21-05
9. 21 'OS
APPARENT DIFFERENCE OF LONGITUDE GIVEN BY EACH EXCHANGE OF SIGN
- . - V -
S. io} .
ALS. '
: - ' ::"- :
Signals sent from Paris.
Signals sent from Greenwich.
Paris
Chronograph
(IiwnwMi
Chronograph.
DillVf-
ence.
Paris
Chronograph
reeii \v Mi
[CliFOMgrapti
Differ- Paris
ence. jjChrmiograph
Greenwich
Chronograph
Differ-
ence.
Porfc
Chronograph.
Greenwich
Chronograph.
Differ-
ence.
Mean of Signals
h m
23- 55- 9'93
-08
-42-31
i. 37- 29-34
- -08
.42-46
2. 4.3578
'08
42-49
o. 3. 25-17
- -08
47 '38
o. 30. 9-11
'o?
47 '39
o. 42. 19-50
-10
47 '40
i. 5- Si "87
-09
47-41
1.40. 17-34
'07
-73-98
i. 55. 26-49
-io
74-01
2. ?. 52 -38
-06
74-04
h m *
23. 44. 58-00
'O2
+8-56
I. 27. 17-34
'02
+8- S 6
I. 54.23-7I
oo
+8-56
23.53. 8-45
oo
+8-48
o. 19. 52-42
-04
+8-48
o. 32. 275
-04
+8-48
o. 55. 35-02
oo
+8-48
I. 29. 34-32
-03
+8-29
1-44- 43 '29
-01
+8-29
i. 57. 9' 2 4
oo
+8-29
1888
in s
io. 11-93
-06
50-87
October 2
h m a
23- 59- 44-24
-08
42-32
1
L888 Octo
i. 42, 9-60
-08
42-47
2. 9. 26-79
-08
42-49
o. 7.55-17
'OS
-4738
0.34. 27-I2
-07
-4739
o. 46. 47 "68
-io
47-40
i. io. 3870
-09
47-41
i. 45. 3-68
-07
-73'99
i. 59. 54-22
"IO
-74-02
2. 13- 3' - 37
'06
74-05
7. First
h in .s
23.49. 32-29
'O2
+8-56
ber 27.
1.31. 57-60
-02
+8-56
i. 59. 14-72
oo
+8-56
1888 Octo
23. 57- 38-43
oo
+8-48
o. 24. 10-42
-04
+8-48
o. 36. 30-91
-04
+8-48
i. o. 21-86
oo
+8-48
1888 Nov<
i. 34. 20*67
-03
+8-29
I. 49. II'OI
'01
+8-29
2. 2. 48-22 |
'OO
+ 8-29
Exchan
in 8
io. 1 1 -95
-06
50-88
ge. conti
h in s
23. 56. 28-77
-10
42-32
Exchange.
1.38.51-98
-io
42-47
' 2. 6. 0-13
-09
42-49
o. 4. 44-90
-oS
-47-38
O. 31. 21 'Si
"OS
4739
o. 43. 36-76
'12
47-40
I. 7. 18-40
'II
47-41
nued.
h m s
23. 46. 1677
-02
+8 5 6
I. 28. 39-89
-01
+8- 5 6
N
I. 55. 48-00
oo
+8-56
23. 54. 28 -J I
oo
+8-48
0.21. 5-04
-04
+8- 4 8
o. 33- 19-91
-04
+8-48
o. 57. i -44
'oo
+8-48
I. 30. 50-16
+ -02
+ 8-29
1.45. 59-00
+ 'O2
+8-29
I. 58. 47-68
oo !
+8-29
m s
IO. I2'OO
- -08
50-88
h in u
2-3. 57.41-07
'ID
42-32
I. 40. 6-42
"10
-42-47
2. 7. 20-46
-09
42-48
o. 6. 2-31
-08
-4738
o. 32. 38-96
-08
47-39
o. 44. 49-19
-12
47-40
i. 8. 41-22
-ii
47-41
1.42.47-38
- -07
-73-99
i. 57- 55-40
-14
74-02
2. 10. 57-43
-0?
74-05
h m
23. 47. 29-05
'O2
+8- S 6
I- 29. 54-33
-oi
+8-56
1-57- 8-33
oo
+8-56
23- 55- 45-So
oo
+8-48
O. 22. 22-19
-0 4
+8-48
o. 34- 32-33
-04
+8-48
o. 58. 24-25
oo
+8-48
1. 32. 4-14
+ -02
+8-29
I. 47. I2'OO
+ -O2
+8-29
2. O. 14-18
oo
+8-2 9
m a
IO. 12-02
-08
50-88
Parallax of pens
Clock slow
EE'
9. 21 -OO
9. 21 -OI
9. 21-04
9. 21 '06
10. I2'OO
-06
5I-O2
Second
10. I2-OO
-06
-5I-03
io. 12-09
-09
51-03
io. 12-09
'09
-5I-03
Parallax of pens
Clock slow . .
EE'
9. 2O-92
9. 2O-9I
9. 20-97
9. 20-97
Moan of Signals
Paiallax of pens
io. 12-07
-08
-51-05
io. 12-07
-08
-51-05
io. 12-13
-09
-51-05
IO. I2"I
'Of
-5I-04
KF'
9. 20-94
9. 20-94
9. 20 -99
9. 2I-OO
io. 16-72
- -08
-55-86
ber 30.
io. 16-74
-08
-55-86
io. 16-79
-08
-55-86
io. 16-81
-08
-55-86
FF'
9. 20-78
io. 16-69
- -03
-55-87
9. 20-80
io. 16-70
-03
-55-87
9. 20-85
io. 16-77
-04
-55-87
9. 20^87
io. 16-77
'Oi
-55-87
Parallax of pens
FE'
9. 20-79
9. 20-80
9. 20 -86
9. 20-86
Mrau of Signals
io. 1675
-06
-55-88
io. 16-77
-06
-55-88
io. 16-85
-08
-55-88
io. i6'S6
'oS
-55-88
EE'
9. 20 -8 1
9. 20-83
9. 20-89
9. 20-90
Mean of Signals
io. 16-85
-09
-55-89
io. 16-84
-09
-55-89
io. 16-96
'ii
-55-89
9. 20-96
io. 43-24
- -09
I. 22-27
io. 16-97
-ii
Clock slow
-55-S9
EF'
9. 20-87
9. 20-86
9. 20-97
io. 43-24
-09
I. 22-28
Mean of Signals
io. 43-02
-04
i. 22-27
jmber 9.
io. 43-01 i. 41. 33-40
-04;, -07
I. 22'28 73'98
FE'
9. 20-71
io. 43-20
-09
I. 22-30
9. 20-69
io. 43-21
- -09
I. 22-31
I. 56. 42'4I
-14
74-02
2. 9. 30-94
- -07
74'05
9. 20-88
9. 20-87
io. 43-40
- -16
i. 22-31
io. 43-41
-16
i. 22-31'
Parallax of pens
Clock slow
EE'
9. 20 -8 1
9. 20-81
9. 20-94
9- 20-93
io. 43-14
-06
i. 22-331
io. 43-15
-06
I. 22-34
io. 43-26
07
-1.22-34
io. 43-25
07
-i. 22-34
Clock slow
FF'
9. 20-75
9. 20-78
9. 20-85
9. 20-84
102
TELEGRAPHIC DETERMINATION OF LONGITUDE. PARIS-GREENWICH, MADE IN 1888.
Signals si-nt from Paris. Sij^i als tent from Greenwich.
Paris
Chronograph.
Greenwich
Chronograph.
Differ-
ence.
Paris
Chronograph.
Greenwich
Chronograph.
Differ- Paris
ence. , Chronograph.
Greenwich
Chronograph.
Differ-
ence.
Paris
Chronograph.
Greenwich
Chronograph.
Differ-
ence.
M ean of Signals
h m s
2. 37- 33-53
'IO
74-09
o. 10. o'6i
-IO
-1.24-07
o. 39. lo'ii
-10
1.24-13
1. 50. 28-98
04
I. 24-29
2. i. 35-01
- -03
1.24-31
2. 17. 30-40
-10
-I- 24-35
h m s
2. 26. 50-24
-01
+8-29
23-59. 7 '6l
ot
+8-12
o. 28. 17-12
- -03
+8-12
i -39- 35'9 6
- '5
+8-12
i. 50. 41-87
-02
+8-12
2. 6.37-I7
'OS
+8-12
m s
10. 43-29
- -09
I. 22-40
1888 N
h m 9
2. 4 2. 36-59
-io
74-I2
888 Nove
0. 15-3574
-io
I. 24-08
o. 43. 42-97
'10
1. 24-14
1-55- 7-05
-04
1.24-30
2. 7. II-O5
- '03
1. 24-33
388 Novel
2. 21. 46-07
'ID
I. 24-36
ovem her 5
h in s
2 - 3'- 53'3
01
+8-29
mber 13.
o. 4. 42-75
'5
+8-12
o. 3 2 - 49^7
-03
+8-12
1.44. 13-98
'05
+S-I2
1.56. 17-87
-02
+8-12
Tiber 13.
2. 10. 52-83
-05
+8-12
). cont
m a
io. 43-29
- -0 9
I. 22-4I
inued.
h in s
2. 38. 58-91
'14
74-11
Exchange.
o. H. 3677
'20
I. 24-08
o. 40. 29-20
'5
i. 24-14
i. 5i.47'6i
-06
i. 24-29
2- 3- I4'95
-06
i. 24-32
Exchang
2. 18. 51-17
-16
' 2 4-35
h m s
2. 28. 15-46
oo
+8-29
o. 0.43-58
-03
+8-12
o. 29. 36-01
-03
+8-12
I. 40. 54-40
-04
+8-12
I. 52. 2170
-02
+8-12
a
2. 7.5771
-04
+8-12
Ill 9
io. 43-45
14
I. 22-40
h in s
2. 40. 21 'l6
-14
74 "
o. 13. 12-53
-20
i. 24-08
o. 41. 4170
- -'5
i. 24-14
i-53- 179
-06
1.24-30
2. 4- 53^9
-06
1. 24-32
2. 2O. 3-94
-16
I. 24-36
h m s
2. 29. 37-71
oo
+8-29
0. 2. 19-33
"3
+8-12
o. 30. 48-48
-03
+8-12
I. 42. 8-58
-04
+8-12
i- 53- 59'83
-02
+8-12
2. 9. 10-46
-04
+8-12
m a
io. 43 -45
-14
i. 22-40
Parallax of pens
EF'
9. 2O'8o
9. 20-79
9. 20-91
9. 20 91
Mean of Signals
Parallax of pens
1
10. 52-97
- -05
-I. 32-19
First 1
io. 52-99'
-5,
i. 32-10
io. 53-19
-17
I. 32-20
9. 20-82
io. 53-20
'I?
I. 32-20
Clock slow
EF'.. ."
9. :o-73
9- 20-74
9. 20-8;
10. 52-99
-07
-i- 3 2 "2.5
io. 53-00
-07
i. 32-26
10. 53-19
"12
I. 32-26
io. 53-22
'12
I. 32'26
Parallax of pens
EE'
9. 20 67
9. 20-67
9. 20-81
9. 2O-8/;
Mean of Signals
to. 53-02
+ -oi
I. 32-41
io. 53-07
+ -oi
I- 32-42
io. 53-21
'O2
I. 32-41
to. 53"2i
-02
I. 32-42
Parallax of pens
Clock slow
FE'..
9. 20-62
9. 20-66
9. 2078
9. 2077
Mean of Signals
10. 53-14
'OI
-I. 32-43
io. 53-18
-01
1. 32-45
io. 53 '25
-04
i. 32-44
io. 53-26
'04
I- 32-44
Parallax of pens.
Clock slow
FF' .
9. 2070
9. 20-72
9- 20-77
9. 2078
Mean of Signals
1
10. 53-23
- -05
i. 32-4"
Seconc
io. 53-24
- '05
i. 32-48
io. 53-46
"12
I- 32-47
10. 53-48
I. 32-48
Parallax of pens
Clock slow
EE'
9. 20-71
9. 20-71
9. 2O-87
9. 20-88
RESULTING DIFFERENCE OF LONGITUDE AND MEANS FOR EACH DAY.
103
The means of the four results from each set of signals are given in Column IV.
the following Table. The means of the results " Signals sent from Paris," a
of
and
" Signals sent from Greenwich," were taken, and the difference of these is given
in Column VI.
Resulting Difference of Longitude and Means for each Day.
Date.
Greenwich
Sid. Time.
Chrono-
graphs.
Reuniting
Longitude.
Mean for
Day.
Time of
Transmission.
Mean for
Day.
d
h m
Ill S
in a
,
Sept. 30
21. 54
FF
9. 20-648
+ 0-028
23. 12
FE'
625
+ 0-045
23.23
KE'
593
+ 0-043
2 3- 45
EF
608
9. 20-619
+ 0-028
+ o 036
Oct. i
21.41
I'F
570
+ 0-035
n-53
FK'
585
+ 0-050
22. 4
EE'
530
+ 0-025.
22. ig
EF'
535
9.20-55 5
+ 0-030
+ 0-035
Oct. 3
23. 8
FF'
785
+ 0-085
23. 22
FE'
743
+ 0-048
23- 33
Eti'
720
+ 0-015
23-44
EF'
7 '5
9.20-741
+ 0-020
+ 0-042
Oct. 5
21. 52
FF'
735
+ 0-025
22. 5
FE'
725
+ O'O2O
22. I/
EE'
698
+ 0-043
22.32
EF
705
+ 0-02O
o. 7
FF
725
+ 0-030
o. 1 8
FE'
688
O'OOS
o. 3 1
EE'
728
+ 0-OI3
o. 42
EF
760
9. 2O-72I
+ 0-020
+ O-O2O
Oct. 1 1
21. 56
FF'
438
+ 0-033
22.31
FE'
443
+ 0-038
22. 40
EE'
403
+ 0-013
22. 59
EF
410
+ 0-035
0.4!
FF
408
+ 0-048
o-53
KE'
363
9. 2O-4II
+ 0-063
+ 0-038
Oct. 1 3
21.49
FF'
428
+ 0-048
22. I
FE'
438
+ 0-028
22.35
EE'
53
+ 0-088
22.48
EF
430
+ 0-040
o. 38
FF'
365
+ 0-020
I. 00
EE'
'393
9. 20-426
+ 0-048
+ 0-045
Oct. 14
22.43
FF'
'443
+ 0-028
23.40
FE'
420
+ 0-055
2 3- 59
EE'
433
+ 0-073
- 34
EF
510
+ 0-035
0.57
FF
485
+ 0-035
i. 1 1
EE'
'495
9. 20-464
+ 0-035
+ 0-044
Oct. 1 5
o- 3
FE'
590
9. 2O'59O
+ 0-050
+ O-O50
Oct. 17
22. 5
FF'
583
+ '033
22. 3 2
FE'
523
+ 0-048
22. 43 EE'
'5 '3
+ 0-058
22. 56 EF'
550
+ 0-035
104 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1
Resulting Difference of Longitude and Means for each Day continued.
Date.
Greenwich
Sid. Time.
Chrono-
graphs.
Resulting
Longitude.
Mean for
Day.
Time of
Transmission.
Mean for
Day.
d
h m
Ill
in s
B
B
Get. 1 7
o. 28
EE'
9.20-455
+ 0-065
o. 46
FF
465
9.20-515
+ O-O4O
+ 0-047
Oct. 19
22. 46
FF
40O
+ 0-030
22. 58
FE'
340
+ 0-040
23- 9
EE'
338
+ 0-048
23. 52
EF'
'353
+ 0-028
0.42
FF'
325
+ O-O25
0.53
EE'
283
9. 20-340 + 0-048
+ 0-037
Oct. 20
23-54
FF'
373
+ 0-028
o- 13
FE'
315
+ O-O5O
o. 29
EE'
3^
+ 0-058
0.44
EF'
368
9.20-346 +0-038 +0-044
Oct. 21
22.45
FF'
393
+ 0-023
22. 56
FE'
365
+ O-O5O
23- 8
EE'
353
+ 0-058
23.48
EF'
388
+ 0-033
1.14
FF'
318
+ O'OlS
1.26
EE'
390
9. 20-368
+ 0-065
+ O-O4I
Oct. 23
23.54
FF'
9.21-035
+ O'OIO
O. 10
FE'
9- 20-993
+ 0-058
0.25
EE'
9. 2 I '013
+ 0-073
0-4-4
EF'
O7O
9. 21-028
+ 0-015
+ 0-039
Oct. 26
23. 19
EF'
9. 20-848
+ 0-023
23-37
FF'
875
+ 0-065
o. 32
EE'
823
+ 0-028
' 3
FE'
793
9.20-835
+ 0-078
+ 0-049
Oct.. 27
23. ii
EF'
9.21-055
+ o-o 10
23-47
EE' -028
+ 0-023
1.29
EE' 9. 20-943
+ 0-028
i-57
EF
968
9. 20-999
+ 0-028
+ O-022
Oct. 30
23-55
FF'
825
+ 0-035
0. 22
FE'
828
+ 0-033
Q-34
EE'
858
+ 0-038
o. 58
EF'
915
9.20-857
+ 0-050
+ 0-039
Nov. 9
1.32
FE'
788
+ 0-088
-* 47
EE'
873
+ 0-063
2. OO
FF'
805
+ 0-040
2.29
EF'
853
9. 20-830
+ 0-058
+ O-O62
Nov. 1 3
O. 2
EF'
780
+ 0-045
0.31
EE'
748
+ 0-078
1.42
FE'
708
+ 0-068
i-53
FF'
743
+ 0-033
2. 9
EE'
793
9- 20754
+ 0-083
+ O-O6 I
In forming Means for Day the mean of the result from all the exchanges of signals
has been taken, the corresponding epoch being generally so near the mean epoch for
star observations, that the effect of uncertainty in clock rate would be insensible.
COMPARISON WITH TRANSIT-CIKCLE OBSERVATIONS. 105
XVII. COMPARISON WITH TRANSIT-CIRCLE OBSERVATIONS.
The observations made continuously with the Transit-Circle at the Royal
Observatory, Greenwich, referred to the same clock as was used for longitude observa-
tions, afford a most valuable check on the results. The observations were made by
various observers, but in what follows, all clock errors are reduced to the standard
observer, by applying the known difference of personal equation for the various
observers as determined in the volumes of Greenwich Observations. The registration
was made as usual on the large chronograph (called hereafter R.O.) by means of two
prickers, one of which records clock beats at every two seconds, and the other the
signals made by the observer. The prickers are at a distance apart corresponding to
l s- 04 on the normal clock scale. In usual practice this distance is taken as l sec- , the
difference being neglected as a small constant quantity which affects all observations
equally. In this section, the correction 0"'04 has been applied to the readings from
the R.O. chronograph, and will be referred to below as the "parallax of the prickers."
The Sidereal Standard did not register directly on any of the chronographs. A
relay is interposed in the circuit to distribute the current ; one branch goes directly to
the R.O. chronograph, and another was led, during the longitude operations, to a second
relay in the French hut which distributed the current to the longitude chronographs
(E' and F') and at the same time substituted break for make signals : see p. 20. To
determine what was the time of action of this second relay and the general agreement
of the two circuits, signals were sent on many days to the different chronographs, and
the results compared. These comparisons were made in two ways :
A. The clock Graham 2 (placed in the English longitude hut and used in setting
for stars) was made to register automatically on the different chronographs in turn.
The difference between its indications and those of the Sidereal Standard may be taken
as constant throughout the few minutes of observation, the effect of the clock's rate
being quite insensible.
B. On October 19, a double tapper was constructed to close two circuits simul-
taneously. By its means signals were sent to two chronographs at once (generally
R.O. and E) either at arbitrary times, or at integral seconds of " Graham 2," the connec-
tions being reversed between the sets to eliminate any small difference in the contacts.
The comparisons by methods A and B are distinguished by these letters in column 2
of the following table. The number of signals read off is given in column 3 ; in columns
4, 5, and 6 the means of the times read off from the different chronographs are given ;
and in columns 7 and 8 the differences of E' and F' from R.O.
GREENWICH OBSERVATIONS, 1899.
106 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
The indications of E' and F' have been corrected for " parallax of the pens," and
the quantities in column headed R.O. have been corrected for " parallax of the prickers,"
by subtracting O s< 04.
Comparison of Chronographs by Means of Simultaneous Signals.
D;ite.
G. M. T.
(Civil Reckoning)
1888.
Method.
Number
of
Signals.
R.O.
V
F'.
R.O. - E'.
R.O. -F.
.1 h
s
s
s
8
Sept. 29. 12
A
10
0-63
0-63
O'62
O'OO
+ o-o i
Oct. 17. 1 1
A
10
0-75
0-71
0-71
+ 0-04
+ 0-04
17. 19
A
10
0-90
0-85
+ 0-05
19. 12
A
10
0-57
0-55
0-56
+ 0-O2
+ O'OI
20. I I
B
10
0-61
0-68
0-07
I I
B
IO
0-63
0-69
0-06
13
B
8
0-51
0-52
O'OI
'3
B
8
0-57
o - 6i
o'O4
13
B
1 1
0-45
'43
+ 0'O2
'3
A
8
0-29
0-26
+ 0-03
21.21
B
IO
O'JO
0-52
O'O2
22
B
9
0^46
0-42
+ 0-04
23
B
10
0-44
0-49
0-05
23. 2O
B
10
0-92
0-92
O'OO
21
B
1 1
0-84
0-80
+ '<H
22
B
1 1
0-66 '
0-59
+ 0-07
23
B
9
0-42
0-49
0-07
23
B
1 1
0-38
0-46
0-08
27.21
B
4
0-72
0-71
+ O'OI
Nov. 13. 23
B
'5
0-48
0'43
+ 0-05
Considering these differences between the chronographs as accidental, the com-
parison of clock errors in the following table gives independent determinations of the
difference of longitude between the longitude instrument at Greenwich and the
Greenwich Transit- Circle, and between the longitude instrument at Paris and the
Greenwich Transit-Circle.
Column 4 shows the adopted error of the Sidereal Standard as found by the
observers specified in column 3 on the dates in column 1 at the mean epoch of the
signals (Greenwich sidereal time) which is given in column 2, reduced to the Standard
Observer by the application of known personal equations ; the simple mean being taken
for each day. Equal weight has been given to each result, irrespective of the number
of stars observed as it is considered that the discordances in the results are mainly due
COMPARISON WITH TRANSIT-CIKCLE OBSERVATIONS.
107
to variations of personal equation. Column 5 shows the error of the Greenwich clock
as found by the longitude observer at Greenwich, viz., L. in the 1st and 4th periods
and H.T. in the 2nd and 3rd. Column 6 shows the error of the Greenwich clock as
found by the observer at Paris, viz., H.T. in the 1st and 4th periods and L. in the 2nd
and 3rd, by combining the error found by his observations with the difference of clocks
shown by the exchange of signals. The figures in this column are obtained by adding
to the mean difference of chronographs on pp. 94-102 corrected for "parallax of pens"
the corresponding " Clock slow " for the Paris clock.
In column 7 are given the resulting differences of longitude (uncorrected for
personal equation of the longitude observer) between the Greenwich longitude instru-
ment and the Transit-Circle, and in column 8 the corresponding quantities for the
Paris longitude instrument and the Transit-Circle.
Comparison of Errors of the Sidereal Standard at Greenwich found by the longitude
observers with the corresponding errors found from observations with the Green-
wich Transit-Circle and resulting differences of longitude between the Greenwich
and Paris longitude instruments and the Greenwich Transit-Circle.
Date.
Mean of
Times of
Signals
(Sidereal).
T. C.
Observers.
Sidereal Standard Slow at Time of
Signals as found by
G. -T.C.
P. -T.C.
Transit-Circle
(T. C.).
Longitude Observer at
Greenwich (G.).
Paris (P. ).
Sept. 30
Oct. i
3
5
h m
23- 4
21. 59
23. 26
23. 18
AP
AW
R
JP
Mean
|
+ 577 i
k
+ 5-82
+ 5-96
+ S-83
+ 5'9 2
m s
9. 26-44
26-52
26-57
26-64
Mean.
s
+ 0-05
o-oo
0-08
-0-25
m s
9. 20-67
20-56
20-66
t
20-47
+ 6-09
+ $88
+ 5'9 2
+ 5-96 i
F
RW
JP
Mean
+ 5'9'
+ 5-89 ,
+ 5'94 i
+ S'9 1
EP
JP
RW
Mean
+ 6-18
+ 6-20
+ 6-12
+ 6-17
0-070
9. 20-590
108 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
Comparison of Errors of the Sidereal Standard, etc. continued.
Date.
Mean of
Times of
Signals
(Sidereal).
T. C.
Observers.
Sideral Standard Slow at Time of
Signals as found by
G. -T.C.
P. -T.C.
Transit-Circle
(T. C.).
Longitude Observer at
Greenwich (G.).
Paris (P.).
Oct. I I
>3
'4
'5
Oct. 17
'9
20
21
li in
23. 17
2 3- 9
0. I 1
- 3
23. 15
23- 37
o. 20
23-53
H
F
Mean
+ 7'l8
+ 7-09
s
+ 7' z6
+ 7-63
+ 773
+ 774
+ 8-09
+ 8-32
+ 8-44
+ 8-67
m 9
9- 2 7'67
28-06
28-19
28-33
Mean
s
+ 0-12
+ 0-17
+ o - o6
0-03
m s
9- 20 '53
20- 60
20-52
20-56
+ 7'H
EP
H
JP
RW
Mean
+ 7'43
+ 7-38
+ 7'49
+ 7'53
+ 7-46
AD
JP
E
Mean
+ 7-66
+ 7-58
+ 7-72
+ 772
+ 7-67
H
JP
F
EW
H
Mean
+ 777
+ 8-15
+ 8-05
+ 8-02
+ 8-06
+ 0-080
9- 20 - 553
9. 28-56
28-66
28-79
29-04
Mean
+ 0-O2
0-05
+ 0-05
+ 0-09
9. 20-49
20-29
20-40
20-46
+ 8-07
AW
F
RW
Mean
+ 8-37
+ 8'39
+ 8'34
+ 8'37
AD
R
Mean
+ 8-44
+ 8'34
+ 8-39
(+8-58)
+ 0-028
9. 20-410
COMPARISON OF ERRORS OF THE SIDEREAL STANDARD AT GREENWICH.
Comparison of Errors of the Sidereal Standard, etc. continued.
109
Date.
Mean of
Times of
Signals
(Sidereal).
T. C.
Observers.
Sidereal Standard slow at Time of
Signals as found by
G-T. C.
P.-T. C.
Transit-Circle
(T. 0.).
Longitude Observer at
Greenwich (G.).
Paris (P.).
Oct 23
6
2?
3
Nov. 9
13
h MI
O. 19
o. 8
o. 36
o. 27
1.47
1.19
AW
H
JP
R
Mean
+ 8-88
+ 8-90
+ 8-98
+ 8-84
1
+ 8-41
+ 8-64
+ 8-56
+ 8-48
+ 8-29
+ 8-12
m s
9- 2 9'44
29-48
29-56
29-34
29*12
28-87
1
-0-49
+ 0-06
0-16
- 0-38
o-ii
0-16
m a
9- 20 '54
20-90
20-84
20-48
20-72
20-59
+ 8-9
AP
AD
JP
RW
Mean
+ 8-56
+ 8-52
+ 8-66
+ 8-59
+ 8-58
T
. SD
R
JP
Mean
+ 873
+ 872
+ 8-64
+ 8-77
+ 8-72
T
JP
AP
Mean
+ 8-80
+ 8-88
+ 8-89
+ 8-86
I
AW
R
JP
AD
Mean
T
H
R
JP
AD
Mean
+ 8-40
+ 8-48
+ 8-24
+ 8-45
+ 8-43
+ 8-40
+ 8-53
+ 8-21
+ 8-14
+ 8-28
+ 8-24
+ 8-28
0-207
9. 20-678
110 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1888.
Dividing the operations into four parts as shown above, the means of columns
7 and 8 give-
Longitude of Paris instrument East of Greenwich Transit-Circle (uncorrected for
personal equation) found by H.T. is
in s
From Part I. 9 20-590
IV. 9 20-678
Longitude of Greenwich instrument East of Greenwich Transit- Circle (uncorrected for
personal equation) found by H.T.
s
From Part II. + o'oSo
III. + 0-028
combining results of Parts I. and II. and also Parts III. and IV., to eliminate the
difference of longitude of the Greenwich longitude hut and the Transit-Circle, and also
personal equation.
Longitude of Paris instrument East of Greenwich instrument.
Ill S
From Parts I. and II. 9 20-510
III. and IV. 9 20-650
Mean 9 20-580
Similarly longitude of Paris instrument East of Greenwich Transit-Circle found by
L., is
m s
From Part II. 9 20-553
III. 9 20-410
and longitude of Greenwich instrument East of Greenwich Transit-Circle, found
by L.
s
From Part >. 0-070
IV. - 0-207
and longitude of Paris instrument East of Greenwich instrument
111 S
From Parts I. and II. 9 20-623 .
III. and IV. 9 20-617
Mean 9 20-620
Taking the means of H.T.'s and L.'s results we have :
Longitude of the Paris instrument East of the Greenwich instrument, as found
indirectly by use of the Transit-Circle observations : 9 m 20 S '600.
RESULTING DIFFERENCE OF LONGITUDE.
4
XVIII. RESULTING DIFFERENCE OF LONGITUDE.
Ill
The Mean Results for each day given on pp. 103, 104 are collected in the
following table. A weight of 2 has been given to a full night on which two exchanges
of signals were made, and weight 1 to a half night with only one exchange of signals
and a comparatively small number of clock stars at Greenwich or Paris.
Parts I. and III.
Part II.
H.T. at Paris. L. at Greenwich.
L. at Paris. H.T. at Greenwich.
Date.
Result
for Day.
Discordance
from Mean.
Weight.
Date.
Result
for Day.
Discordance
from Mean.
Weight.
1888.
m s
s
1888.
m s
s
Sept. 30
9 20-619 -158
I
Oct. 1 1
9 20-41 1
-016
2
Oct. i
"555 ' ~ '2*2
I
'3
426
-ooi
2
3
741 - -036 I
'4
464
+ -037
2
5
721
- -056 2
'5
590
+ -163
I
Weighted Mean
9 20-671
Oct. 23
21-028
+ ^51
,
17
515
+ -088
2
26
20-835
+ 'OSS
I
J 9
340
-087
2
27
999
+ "222
2
20
346
- -08 1
I
30
857
-f- -080
I
21
368
-oca
2
Nov. 9
830
+ "53
I
>3
753
-024
2
Weighted Mean
9 20-882
9 20-427
Mean of Parts (^
I. and III. /
9 2 777
The discordances in column 3 with the weights in column 4, treated by the
2 n v z
formula (p. e.) 2 = w .rj, where v is the discordance from the mean, p the weight, and
n the number of determinations, give for the probable error of a determination with
weight 1.
From Parts I. and III. -j- 0-114
II. 0-070
.Mean
-092
In deducing the probable error from Parts I. and III., the change of personal equation
has been treated as accidental, and thus the value found for the probable error is larger
than if the change in personal equation had been allowed for.
112 TKUEGKAPHIC DETERMINATION OF LONGITUDE, PARIS-GRKENWICH, MADE IN 1888.
Thus we have the following results :
111 8 S
From Parts I. and III. 9 20777 d= 0-025
II. 9 20-427 0-025
Longitude of the Paris instrument East of the Greenwich instrument :
9-2O602 O018
This longitude refers to the following meridians :
At Paris, the pier of the English instrument which is s '2 7 west of Cassini's
meridian.
At Greenwich the old meridian of Bradley, 19 ft. or O s> 02 west of the Transit-
Circle.
Thus the meridian of Cassini is,
9 m 20 S '60 - 8 '02 + O s> 27 or
9 m 2O-85 E.
of the Greenwich Transit Circle.
TELEGRAPHIC DETERMINATION
OF THE
DIFFERENCE OF LONGITUDE
BETWEEN
PARIS AND GREENWICH
IN THE YEAR 1892.
L INTRODUCTORY.
i
As the provisional results of the determination of the longitude Paris-Greenwich made
in 1888 by the English and French observers respectively differed by about two-tenths
of a second of time, it was suggested by General Derre"cagaix, the Director of the
" Service Gdographique de I'Arme'e Fra^aise," that a redetermination should be made at
a convenient opportunity. As arrangements were in progress for the determination of
the longitude Greenwich-Montreal in the year 1892, in which Greenwich observers
were to take part, it was considered that the work of the Paris longitude could be
conveniently undertaken in the months of June and July 1892, between the two
stages of the Montreal longitude, which were to take place in April and May and
August and September of the same year. It was decided that, as in the case of the
1888 longitude, two observers of the French Service Ge"ographique, who were, as
before, Colonel Bassot (B) and Commandant Defforges (D), should take part in the
work, and two observers from the Royal Observatory, Greenwich, who were Mr
Turner (H T) and Mr Hollis (H). The observers were to be interchanged twice, as
in the previous determination, as follows :
1st Series : D and H T at Greenwich, B and H at Paris.
2nd Series : B and H at Greenwich, D and H T at Paris.
3rd Series : B and H at Greenwich, D and H T at Paris.
4th Series : D and H T at Greenwich, B and H at Paris.
Each series was to consist of three full nights or the equivalent in half nights. The
Paris station was at the Observatoire du Dep6t de la Guerre, Montsouris, the English
GREENWICH OBSERVATIONS, 1899. P
114 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1892.
instrument being mounted on the same pier as in 1888, but the French instrument
was on this occasion on a pier about ten feet to the west of the English pier. At
Greenwich the English observers used the pier in the newly erected Transit Pavilion
in the front court, which is on Bradley's meridian ; the French observers used the
pier in the front court, 41 feet west of the transit-circle, which they had used in
1888. Arrangements for telegraphic communication were made by co-operation of
the French and English Post-Offices, and a wire was put at the disposal of the
Astronomer Royal between 9 p.m. and 1 a.m. each evening. Commandant Defforges
arrived at Greenwich to mount and adjust his instrument on June 3. Mr Hollis left
for Paris on June 6. The following is an account of the course of the work, P
denoting Paris and "G Greenwich :
June 7. Clear P : partly clear G : instruments being adjusted at Paris. One
exchange of Signals.
June 8. Clear P : partly clear G : two exchanges.
June 9. Clear P and G : two exchanges.
June 10. No observations made.
June 11. Clear P : cloudy G : one exchange.
June 12. Clear P : cloudy G : one exchange..
June 13. Clear P and G : two exchanges.
June 14. Cloudy P and G.
June 15. Clear P : cloudy G : one exchange.
(End of 1st Series.)
June 16. Mr Turner and Commandant Defforges left for Paris.
June 17. Mr Hollis returned to Greenwich.
June 18. Col. Bassot arrived at Greenwich : cloudy P and G : one exchange.
June 19. Cloudy P and G.
June 20. Cloudy P : clear G.
June 21. Cloudy P : cloudy G.
June 22. Cloudy P : cloudy G : one exchange.
June 23. Clear P and G : two exchanges.
June 24. Cloudy P : clear G : one exchange.
June 25. Cloudy P and G : one exchange.
June 26. Clear P and G : two exchanges.
June 27. Clear P and G : two exchanges.
June 28. Cloudy P and G.
June 29. Cloudy P : partly clear G : one exchange.
(End of 2nd Series.)
INTRODUCTORY. 115
June 30. Clear P and G : two exchanges.
July 1. Clear P and G : two exchanges.
July 2. Clear P and G : two exchanges.
(End of 3rd Series.)
July 3. Col. Bassot left for Paris.
July 5. Mr Turner returned to Greenwich.
July 6. Mr Hollis left for Paris : Commandant Defforges returned to Greenwich.
Clear P : cloudy G : one exchange.
July 7. Clear P : cloudy G : one exchange.
July 8. Clear P and G : one exchange.
July 9. Clear P : cloudy G : one exchange.
July 10. No observations made : two exchanges.
July 11. Clear P and G : one exchange.
July 12. Clear P : cloudy G : one exchange.
July 13. Clear P : cloudy G : one exchange.
July 14. No observations made.
July 15. Clear P and G : one exchange.
July 16. Cloudy P and G.
July 17. Cloudy P and G.
July 18. Clear for a short time P : cloudy G.
July 19. Cloudy P and G.
July 20. Cloudy P : clear for a short time G : one exchange.
July 21. Clear P : cloudy G : one exchange.
July 22. Clear P : partly clear G : one exchange.
The whole apparatus of the English observers was quite distinct from that used
by the French, except that the telegraph line was common to both. The observations
were reduced quite independently, and the following account refers only to the English
determination.
II. OBSERVING STATIONS.
Greenwich. The transit instrument at Greenwich was mounted in the new
Transit Pavilion, erected in the front court in 1891. The centre of the pier is in
the meridian of Bradley 's transit, 19 ft. west and 70 ft. north of the transit-
circle, being in exactly the same position as in the Paris longitude determination
in 1888. The building is shown in plan and section (transverse to the meridian)
in Plate IV. The whole is on a concrete foundation 1 ft. 6 in. deep under the
116 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS -GREENWICH, MADE IN 1892.
pier and walls, and 6 in. deep in the intervening space. The pier is of brick
with a capping stone on the top, the total height above the foundation being 8 ft.
9 in. The observing platform is raised 3 ft. 3 in. above the floor level, serving as
a convenient table for the chronograph and signalling apparatus. The space under
the platform serves as a basement for batteries, etc.
The stand of the transit instrument (with provision for adjustment in level and
azimuth) is firmly bolted to the pier by means of lewises cemented into the
capping stone. The pier is isolated from the observing platform and floor, and is
protected from accidental jars by a wooden framework round it. The roof consists
of a pair of semi-domes sliding apart so as to give a clear opening of 2 ft. 6 in.
in the plane of the meridian, semi-circular in section.
The observing room at Paris was the same as that used in 1888. (See page 6).
III. INSTRUMENTS.
The telescopes were those designated D and E of the series of five transits referred
to in the account of the Paris-Greenwich longitude 1888, p. 6, where a general description
applying to all these instruments will be found. In 1891 a buffer actuated by a strong
spring was added to the object-glass cell of both Transits D and E to hold the lenses
firmly in their place. New sets of nine wires were inserted in the eye-pieces, the micro-
meter screws examined and springs renewed, and the pivots of the instruments re-
polished. In preparation for the Montreal longitude, two cast-iron stands, with steel
sector-bearings and fitted with apparatus for rapidly reversing the telescope in its Y's,
were supplied by Messrs Troughton and Simms. The reversing apparatus carries
friction-wheels riding on springs, which act as counterpoises, and the stands themselves
are adjustable in azimuth and level by screws at the ends of the base. The stand desig-
nated I. was mounted at Greenwich (with the level adjusting screw at the east end of
the pier), and was used throughout the operations. One of the cast-iron stands
mentioned in the account of the operations of 1888 which has V-shaped bearings
individually adjustable in azimuth and level, was used throughout at Paris.
Diagonal Bohnenberger eye-pieces, which permit observations of the nadir to be
made with the tube of the eye-lens horizontal, were supplied for both instruments.
The four hanging levels, two of which had been used in the operations in 1888,
were in 1891 fitted with aluminium legs to convert them into striding levels, and
INSTRUMENTS. 117
were also fitted with a micrometer screw acting on a system of levers according to
the plan described by Mr Turner in Monthly Notices R.A.S., Vol. LIL, p. 52. The
arrangement is shown on Plate V. The level bubble A B, graduated so that I' 1 '
corresponds approximately to l", is pivoted at one end inside a metal tube ; the
other end bears on a knife edge D, 8f in. from the pivots, which is fixed to a lever
E F turning on pivots at E, and acted on by a micrometer screw at F, B and F
being kept up to their bearings by strong springs. The arms D E and F E are 2 fin.
and 9f in. long respectively, and the micrometer screw has 100 threads to the inch.
The head being divided into 60 parts, one division represents 1 -6000th of an inch
and should correspond to 1" of level approximately.
IV. INSTKUMENTAL CONSTANTS.
(1) The value of one revolution of the micrometer screws. As the Transits D
and E were used also in the Greenwich-Montreal longitude, 1892, and in the Green wich-
Killorglin longitude, 1898, this section applies to all these operations. It is explained
elsewhere (see p. 24, Paris-Greenwich Longitude, 1888) that a close circumpolar star
was usually bisected 10 times with the middle wire, the instant of bisection being
registered on the chronograph. On some occasions during the work, additional
bisections, usually 10, were made when the star was at some distance from its first
position. The mean of each group of readings for bisection is taken, and also the
mean of the corresponding times. The ratio of the differences of these means gives
the value of one revolution. In the following tables, column 2 gives the N.P.D.. of
the star observed, a negative sign implying that the observation was made below
Pole. Columns 3 and 4 give the intervals between the mean of the observations
in time and revolutions of screw, respectively, and column 5 gives the number of
bisections in each group. The weights given in column 6 have been taken as
approximately proportional to the intervals measured, when 10 bisections have been
made in each group. This system of weighting has been adopted as it was not
considered advisable to give the full theoretical weight to the observations made
over a wide range of the screw, the observations of circumpolars being generally
confined to a small range near the middle. The quotient of the quantities in
column 3 by the corresponding number in column 4, multiplied by "sin N.P.D.,
gives the results in column 7, of which the weighted mean is taken.
118 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH. MADE IN 1892.
Determination of the Value of one Revolution of the R.A. Micrometer Screws
in Time at the Equator.
Transit D. Paris Longitude.
Date
1892.
N.P.D. of
Star.
Interval in
Time.
Interval in Revs,
of Screw.
No. of Obs.
Weight.
Value of i rev.
in Time.
' ii ' ' 1 r
s
June 9
+ 2 21 2
219-72 2-392
IO, IO 2
3-7675
9
+ 3 23 27
290-15 4-569
1O, IO
5
3-7561
13
+ 2 21 2
299-95
3-300
10, 10
3
3-7279
23
+ 3 23 23
274-08
4'329
10, 6
2
37433
27
- 4 43 5i 313-96
6-945
10, 5
4
37284
July i
- 4 43 52 292-97
6-447
10, 6
4
374 8 i
+ 7 47 5 81-90
2-952
8, 10
3
3-7580
8
+ 3 23 18 117-48
1-847
IO, 10
2
37593
8
- 2 47 21 123-19
1-592
10, 10
2
375 8 3
ii
+ 3 23 17 228-53
3-582
IO, IO
4
37704
'5
+ 7 47 4 71-94
2-580
IO, IO
3
37767
20
+ 7 47 3 128-60
4-639
10, IO
5
37547
Mean
37529
Transit D. Montreal Longitude.
May 9
i 16 ii
165-35
0-967
10, 8
i
37882
10
+ i 41 52
632-06
5-000
IO, 10
5
37453
ii
i 16 i i
473'4S
2-800
IO, 10
3
3-7469
12
+ i 41 52
287-66
2-290
10, 10
2
37217
Sept. 7
+ 3 23 6
746-50
11-765
10, 10
12
37456
7
509-78
8-029
IO, 10
8
3748i
7
...
305-56
4-809
8, 8
3
3-7430
7
89-51
1-416
8, 8
i
37382
8
i 16 3
1243-86
7-311
IO, IO
7
37634
8
1015-08
5-952
10, IO
6
3772S
8
...
804-28
4732
10, 10
5
37597
8
613-94
3-605
IO, 10
4
37671
8
_
416-96
2-442
12, 12
3
3-7769
8
142-78
0-830
12, 12
i
3-8052
9
+ 3 23 6
406-23
6-391
IO, 10
6
37530
9
I33-45
2-096
10, 10
2
3-7592
9
- i 2 57
914-00
4"457
IO, IO
4
37540
9
...
331-37
1-605
IO, 10
2
37799
Mean
37559
DETERMINATION OF THE VALUE OF R.A. MICROMETER SCREWS.
Transit D.Killorr/lin Longitude.
119
Date.
N.P.D. of
Star.
Interval in
Time.
Interval in Revs,
of Screw.
No. of Obs.
Weight.
Value of i rev.
in Time.
1898.
e t n
8
r
8
November 3
+ i 44 40
I22-05
1-028
8, 7
o
(3-6I42)
3
+ * 13 4 1
88-5I
0-503
10, 6
I
37713
6
+ i 13 4
426-58
2-433
10, 10
3
37569
Mean
i-7601:
J 1 ** V J
fw- \
Transit E. Paris Longitude.
1892.
June 23
+ 3 23 22
237-27
3-716
10, 10
4
37750
24
+ 7 47 9
78- 9 3
2-846
10, 10
3
37571
26
+ 3 o 29
78678
10-958
10, 10
ii
3-7678
26
+ 3 o 29
3O6-OI
4-255
10, 8
4
3774
29
+ 7 47 8
I09-59
3-946
10, 10
4
3-7622
3
+ 7 47 7
88-99
3-188
10, 10
3
37813
30
+ 3 23 20
l6073
2-520
10, 10
3
37703
3
+ 3 23 20
492"33
7732
10, 10
8
3-7640
July i
+ 7 47 7
200-04
7-210
IO, 10
7
37583
i
+ 3 23 20
226-70
3-559
IO, IO
4
37653
i
- 2 46 59
605-98
7-848
IO, IO
8
3749 i
i
- 2 46 59
299-37
3-861
10, 10
4
37648
2
+ 7 47 7
89-01
3-197
IO, IO
3
37715
2
+ 3 23 20
52175
8-192
IO, IO
8
37649
2
+ 3 23 20
123-02
1-956
10, 10
2
37178
9
+ 3 23 i
178-89
2-832
IO, 10
3
37334
ii
+ 7 47 5
137-76
4-950
IO, IO
5
37697
ii
+ 3 23 17
257-42
4-076
10, 10
4
37324
1 1
+ 3 23 17
158-48
2-493
10, 10
2
3-7569
15
+ 7 47 4
96-27
3'4 6 9
8, 10
3
375 8 9
15
+ 3 Z 3 l6
125-49
2-015
10, 10
2
3-6802
21
+ i i 45
562-73
2-670
9, 10
3
37855
21
I 2 42
580-82
2-804
IO, IO
3
37788
21
+ 3 24 44
17679
2-851
10, 6
2
3-6908
21
- 5 ii 52
179-03
4' 2 73
IO, IO
4
37957
22
+ 3 23 14
176-55
2-762
10, 10
3
3-7767
22
+ 3 23 14
I73-3S
2-697
IO, IO
3
3-7976
22
- 2 47 8
140-98
1-788
10, 4
i
3-8318
22
- 2 47 8
163-50
2-094
IO, 10
2
3-7945
22
+ i i 44
171-90
0-823
IO, IO
I
37506
22
+ 3 24 44
175-52
2-786
10, 10
3
3749 8
22
- 5 ii 52
II2-OO
2-697
10, 10
3
3-7621
Mean
3-7627
120 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1892.
Transit E. Montreal Longitude.
Date.
N.P.D. of
Star.
Interval in
Time.
Interval in Kevs.
of Screw.
No. of Obs.
Weight.
Value of i rev.
in Time.
1892.
/ II
s r
8
Apr. 14
- 3 I? 32
236-80 3'624
IO, 10
4
375 2 5
!9
+ i 4i 57
320-99 2-537
10, 10
3
37516
22
+ ' 4 1 57
547-10 4-304
IO, 10
4
3-7692
Aug. 1 6
+ 4 z6 8
176-93 . 3-647
10, 10
4
375*9
16
+ i i 37
361-93 1720
IO, 10
2
37719
16
I 2 50
358-40 1740
10, IO
2
3-7647
16
- 2 47 12
508-64 6-578
10, 10
7
3-7607
18
+ I I 3 6
281-21 1-363
10, 6
i
3-6970
18
- I 2 5 I
173-18 0784
IO, IO
o
(4-0147)
19
- 2 47 13
161-31 2-073
10, 6
i
37834
2 4
+ i i 35
141-63 0-673
10, 6
\
3-7695
2 4
+ 3 2 3 7
163-23 2-566
3. 7
i
3-7563
Sept. 4
+ 4 26 i
234-04 4-805
10, IO
5
37653
4
i 42 8
172-77 1-377
i, 5
i
3-7267
5
+ 4 26 i
109-11 2 ' 2 49
10, 10
i
3-7503
5
- 2 47 16
308-10 3-973
9, 10
4
37716
5
+ 3 24 28
126-24 i'997
8, 6
i
3-7577
6
i 42 8
127-97 1-009
8, 10
i
37677
7
+ 3 '7 ii
136-98
2-097
10, 10
2
37448
8
+ 4 2 5 59
101-19
2-076
10, IO
2
3-7676
8
+ 3 17 ii
II5-53 i'774
10, 6
I
37334
12
+ 4 2 5 5 8
85-89
1-770
6, 10
I
37678
12
+ 3 17 10
186-57
2-839
9. 9
3
37669
12
- i 2 57
216-95
1-055
9. 9
i
3-7655
13
+ 4 25 58
i37 - 23
2-824
9, 10
3
37557
13
+ 3 17 9
151-06
2-294
10, IO
2
3-7743
13
i 42 i i
466-15
3-692
10, 6
3
3-7522
H
+ 4 2 5 57
95 - i7
1-945 10, 9
2
37816
H
+ 3 17 9
114-51
1-750 10, 10
2
37504
'4
i 2 58
I53-93
0-759
10, IO
I
3-7I39
H
+ 3 24 25
i44 - 3
2-293
10, 9
2
37399
15
+ 4 25 57
81-49
1-676
5, I0
I
37577
15
+ 4 2 5 57
136-68
2-815
IO, IO
3
375 2 4
15
i 42 i i
288-90
2-282
10, IO
2
3-7630
16
I 2 58
198-20
0-964
10, IO
I
37655
Mean
37586
Transit E. Killorglin Longitude.
1898.
May 6
- i 14 7
962-64
5-537
10, 6
4
37456
16
i 14 10
472-80
2-699
10, 10
3
37719
16
i 14 10
115879
6-631
10, IO
7
37682
1
Oct. 8
- i 44 31
274-37
2-264
10, IO
2
3-6839
ii
+ 3 H 48
292-66
4-427
10, 10
4
37692
ii
+ 4 2 3 47
195-65
3'95 6
10, 10
4
37943
12
+ 3 14 48
26377
3-963
10, 10
4
3-7437
DETERMINATION OF THE VALUE OF R.A. MICROMETER SCREWS.
Transit E. Killorglin Longitude. continued.
121
Date
1898.
N.P.D. of
Star.
Interval iu
Time.
Interval in Revs,
of Screw.
No. of Obs.
Weight.
Value of i rev.
in Time.
/ //
8
r
8
Oct. 12
- i 44 32
3I8-63
2-582
10, 10
3
3-7605
13
+ i 13 49
293^2
1-675
10, 10
2
37599
13
+ 4 23 46
I37-48
2-781
10, 4
I
37891
17
+ 3 22 33
161-80
2-515
10, 10
3
37883
17
+ 4 23 45
218-62
4-442
10, IO
4
3-7723
17
- > 44 34
222-29
i -8 1 1
10, 10
2
37318
18
+ 3 22 32
181-18
2-835
10, 10
3
3-7629
18
+ 4 l6 57
108-43
2-150
', 5
i
3-7660
18
+ 4 23 45
126-16
2-563
10, 10
3
37728
22
+ 4 42 44
242-03
5-3ii
10, 9
5
37437
2 3
+ i 13 45
'3574
0-761
10, 10
i
3-8263
23
+ 3 '4 44
107-94
1-617
10, IO
2
37793
23
+ 4 23 43
272-47
5-540
IO, 10
5
3-7692
23
- i 44 37
316-12
2-549
IO, IO
3
3-7735
2 4
+ 4 '6 55
'55'97
3-094
10, 10
3
3-7639
24
+ 4 23 43
125-93
2-562
10, 9
3
3-7669
24
- i 44 37
245-87
2-OOO
10, IO
2
.r74 5
28
+ i '3 43
308-38
1766
10, 14
2
3-7440
28
+ 3 H 4 2
268-44
4-040
10, IO
4
3-7610
28
+ 4 23 42
178-18
3-6l8
IO, IO
4
37745
28
- i 44 38
339' 8 7
2745
IO, IO
3
37683
2 9
+ i '3 43
171-85
0-952
10, 6
i
3'87 3
2 9
+ 3 '4 42
234-26
3-54I
10, 10
4
37443
2 9
+ 4 l6 53
172-87
3-461
10, 7
2
3-7289
29
- i 44 39
279-99
2-278
10, 10
2
37408
31
+ 3 H 4i
124-17
1-857
10, 7
2
37845
3'
- i 44 39
179-98
1-439
10, 6
I
3-8066
Nov. 3
+ 3 14 40
174-50
2-628
10, 10
3
3-7595
8
+ 3 H 39
204-03
3-081
IO, IO
3
37474
8
+ 4 23 4
252-31
5-097
10, 8
4
3-7927
8
- i 44 42
242-86
1-964
IO, IO
2
37653
10
+ i 13 38
271-96
1-567
10, 10
2
3-7169
1 1
- i 44 43
320-37
2-582
IO, 10
3
3-7787
13
+ i 13 37
333'9 6
I-9I7
IO, 10
2
3-7301
13
+ 3 H 38
175-08
2-636
10, 10
3
3-7582
3
+ 4 23 39
128-21
2-605
IO, 10
3
3-7707
'3
- i 44 43
218-46
I-746
IO, 10
2
3-8105
18
+ i 13 35
35'-83
I- 9 83
10, 9
2
37974
20
+ 4 i 6 46
277-61
5-5I8
10, 10
6
37537
22
+ i 13 34
25374
I-438
10, IO
I
3-7758
22
+ 4 23 38
184-25
3757
10, 10
4
3-7560
22
- i 44 46
208-26
1-696
10, 10
2
3-7416
24
+ i 13 33
306-96
1-762
10, 3
i
37278
25
+ i '3 33
321-10
1-819
10, 10
2
37764
25
+ 4 16 45
113-24
2-233
10, 10
2
3-7839
25
t 4 *3 37
191-50
3-911
IO, 10
4
3-749 6
25
i 44 47
408-72
3-333
10, IO
3
37372
27
+ 4 16 44
117-57
2-322
10, 6
2
37778
27
+ 4 4 2 33
127-50
2-770
10, 10
3
3-7789
27
- ' 44 47
183-77
1-500
10, IO
i
3-7337
Mean
3-7629
GREENWICH OBSERVATIONS, 1899.
122 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1892.
These results are summarized in the following Table.
Mean Value of l rev - of R.A. Micrometer Screw.
1892, June- July
1892, April-Sept.
1898, Oct.-Nov.
Transit D.
Paris Longitude
Montreal
Killorglin
Means.
8
37529
37559
37605
Weights.
39
75
4
1892, June-July
1892, April-Sept.
1898, Oct-Nov.
Transit E.
Paris Longitude
Montreal
Killorglin
Means.
8
37627
37586
37629
Weights.
123
74
'57
In the reduction of the Paris longitude the value 3 8 756 = 56"'34 was used for
one revolution of the screw of Transit D and 3 B 762 = 56"'43 for one revolution of that
of Transit E.
(2) For determination of the Equatorial intervals of the vertical wires, observations
were made of coincidence of each wire in turn with its reflected image at the nadir.
The following columns give the distances of each wire from the mean expressed in
revolutions of the micrometer screw. In the column " Position of Instrument," W.
denotes micrometer head West, and E. micrometer head East. The nine vertical
wires are denoted by the Roman numerals I., II., III., etc., the order in which a
star transits when the instrument is in the position micrometer head West.
Wire Intervals. Transit D.
II.
III.
IV.
Wires.
V.
VI.
VII.
VIII.
IX.
May 6
E
r
-3732
r
2-982
_ 2
r
287 -
5H
r r
+ O-O27 +1-506
r
+ 2-242
r
+ 2-993
r
+ 3751
6
W
3741
2-976
2
289
517
0-025
505
2-242
2-990
3-761
9
W
3739
2-982
2
289
522
0-036
505
2-241
2-994
3757
,. 9
E
3735
2-979
2
284
'5*7
0-030
53
2-241
2-991
3748
July 15
E
3738
2-980
2
290
520
0-041
49 8
2-243
2- 99 I
3-752
Aug. 30
W
373 1
2-971
2
2 7 8
517
0-029
'499
2-236
2-987
3743
Sept. 7
E
3-728
2-975
2
275
'SIS
0-028
496
2-237
2-986
3743
1-9779 -2-2846 -1-5174 +0-0309 +1-5017 +2-2403 +2-9903 +3-7507
VALUES OF LEVEL SCALES.
Wire Intervals. Transit E.
123
Date, 1892,
Wires.
and Position of
Instrument.
I.
II.
III.
IV.
V.
VI.
VII.
VIII.
IX.
r
r
r
r
r
r
r
r
r
May 13 E -
-3-729
-2-998 -
2-252
- "49 6
O-OO2
+ -48l
+ 2
2 2O
+ 3-018
+ 3762
,, '3 W
3732
3-OO2
2-255
502
O-OO4
1-489
2
'222
3-019
3-762
Aug. 23 W
3723
2-994
2-250
484
o-oio
1-483
2
212
3-006
3758
,, 23 E
3732
3-003
2-241
490
0-005
1-480
2
212
3-016
3-760
29 W
3732
3-OOI
2-249
483
0-006
1-484
2
22O
3-010
3-757
,, 29 E
37*3
2-998
2-255
-49'
O'OI I
1-488
2
2I 9
3-014
3-760
July 9 w
3727
3-002
2-252
'493
0-008
1-489
2
213
3-019
3761
9 E
3-729
3-004
2-251
491
o-ooi
1-488
2
2I 4
3-016
3758
Sept. 10 E
3724
2-993
2-253
490
0-005
1-485
2
216
3-017
3745
10 W
3731
3'OOI
2-245
"493
0-008
1-486
a
21 7
3-01 1
3-760
Means -
-3-7282 2-9996
2-2503
-1-4913
0-0060
+ I-4853
+ 2
2165
+ 3-0146 +37583
Subtracting
the value for the
centre wire and
converting
the
revolutions into
time with
the value of one
revolution of
the screw
given
on
p. 122, the
following
adopted values
for distances
from
the centre wire are obtained.
Wire (W.)
Transit D.
Transit E.
s
k
I.
- 14-144
- H-
002
II.
11-301
1 1
262
III.
- 8-698
- 8
442
IV.
- 5-815
5
588
V.
VI.
+ 5-525
+ 5'
610
VII.
+ 8-298
+ 8-
361
VIII.
+ 11-116
+ ii-
363
IX.
+ 13-972
+ H-
161
(3) The Value of l rev - of the micrometer screw of the levels was determined in
September 1891, after the alterations were made as described above. The level was
fixed to the clamping circle of the Greenwich Transit-Circle, and the bubble being brought
to a central position of the scale, the bubble, micrometer screw and circle of the
transit-circle were read. The whole apparatus was then moved slightly and the
bubble was brought back to its original position by adjustment of the level micrometer
screw. Comparison of the readings of the screw and circle in the new position with
those previously made gave a value of a revolution of the micrometer screw.
During the longitude operations in 1892, the quantity was determined at con-
venient times by the following method.
124 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1892.
The level error of the transit instrument was determined in the usual way by
observations of the nadir and by striding level. The level of the instrument was
then altered by moving the adjusting screws of the stand, and the level error was
again determined by both methods. Comparison of the change of level, as measured
by the R.A. micrometer screw and by the micrometer screw of the level, gave a value
of one revolution of the latter in terms of the former, which was converted into arc
by means of its known values.
The following are the values found for l div< (^th. of a revolution) of the level
micrometer screws.
Level d.
1891, Sept. 0-98
1892, April 20 0-97
0'99
'9 8
June 14 0-98
July 9 0-98
0-08
Level e.
1891, Sept. 1-02
1892, May 27 1-03
July 22 1-02
For the reduction of the longitude Greenwich-Paris in 1892, the values used
for l dlv- of the micrometer heads were :
for level d c/'-gS for level e i"-O2.
(4) The Calibration of the level bubbles was effected by placing the level in its
usual position during observation, on the pivots of the instrument and making the
air-bubble gradually traverse the whole of the scale by turning the micrometer screw.
Readings of the position of the ends of the bubble and of the screw were taken
at about each division of the scale the whole length of which, in the case of each
level (though showing variations with different temperatures) had a mean length
of about 50 divisions. From these readings curves were laid down showing
the value of 1 scale division at different settings of the bubble. This operation
was repeated several times, and the following table shows the mean value of 1 division
of the scale at different readings deduced from these :
VALUES OF LEVEL SCALES.
125
Level d.
Reading of
centre of bubble.
div.
30
32
34
36
38
40
42
44
46
48
50
5*
54
56
58
60
Value of
i div. O f scale.
l; 95
I- 99
I.7I
''55
1-52
I-6 5
I-8 3
1-96
Z'OI
1-90
174
1-63
1-51
i'S3
>'45
i '49
Level e.
Reading of
centre of bubble.
div.
3
32
34
36
38
40
42
44
46
48
5
5 Z
54
56
58
Value of
i dlT - of scale.
09
06
04
09
16
19
22
21
'22
22
'20
'I?
'5
10
(5) Inequality of Pivots.
The mean level indications, in reversed positions, of the instruments on each night
of observation were compared, and the results are given below. In the first column is
the date, in the second the number (m) of observations of level, by means of the
striding level, micrometer head W, in the third the number (n) of observations,
micrometer head E, in the fourth the weight - to be assigned to the result in the
fifth column, which is one-fourth of the difference between concluded level indications
W and E respectively, and is the correction applicable, positively for the position E,
and negatively for W, to the observed level indications in these positions, due to
inequality of pivots.
Date.
June
Transit D.
2 mn
W E
7
I
i
i
+ 0-303
8
2
3
2
0-013
9
3
6
4
0-158
ii
...
...
...
12
13
5
5
5
+ 0-235
15
...
2O
3
5
4
+ 0-089
Transit E.
2 mn
W E
4
6
5
- 0-273
3
6
4
0-085
4
4
4
0-188
3
3
3
0-260
5
5
5
- 0-043
5
3
4
0-270
126 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1892.
Transit D. continued.
Transit.
A'. continued.
Date.
2 in n
W E
771
2 m W E
m-\-n
4
71,
m+i
4
June 23
7
3
4
+ 0-170
6
5
5
0-025
24
5
4
4
+ 0-093
i
3
2
0-145
26
5
6
5
+ 0-080
5
3
4 +
0-245
27
9
4
6
+ O-22O
5
4
4
0-2I5
29
5
4
4
0-008
30
4
4
4
+ 0-298
4
6
5
0-063
July i
4
6
5
+ 0-015
4
5
4
0-123
2
4
5
4
+ O-2IO
6
3
4
0-293
6
6
i
2
0-240
7
3
3
3
0-063
8
2
3
2
+ 0-423
4
6
5
0-073
9
4
8
5
0-263
ii
4
5
4
+ 0-093
8
5
6 +
0-018
12
...
3
6
4
0-343
13
...
6
3
4 +
0-028
15
i
3
2
+ 0-288
5
7
6
0-280
21
...
4
5
4
0-225
22
2
2
2
+ 0-248
7
7
7 -
0-165
Means
66
63
62
'+0-134
105
107
99
0-139
As the apparent level error due to inequality of pivots is thus very small, and as
the method of making observations in the two positions of the instrument on each
night eliminates any such error from the mean result, it has not been considered neces-
sary to apply any correction for inequality of pivots.
V. CLOCKS.
The clock used at Greenwich was the Sidereal Standard operating on the
chronograph through a relay. The currents obtained from it at every alternate second
are used, to actuate a relay, from which three independent circuits are derived. One
of these is appropriated to the seconds' magnet of the Transit-Circle Chronograph ;
and another was used to give the clock-register used in the longitude operations.
The clock used at Paris was one belonging to Greenwich Observatory, known as
Graham 2, and is fitted with a contact wheel having thirty-one teeth, which closed
the circuit at the alternate even seconds by the clock face, and also at the seventh
second of every minute. This clock was set up in the cellar of the dwelling-house
at Pare Montsouris, where the temperature was approximately constant.
CHRONOGRAPHS, &c. 127
VI. CHRONOGRAPHS, &c.
The chronographs used were those made by Hilger, which had been used in the
first part of the determination of the longitude of Greenwich-Montreal in 1892, April
and May. A paper strip, actuated by clockwork, is made to travel over a metal
plate and under a fountain pen. The pen is held in a socket attached to the
armature of an electro-magnet, and marks a straight line on the paper when in
its position of rest. When the circuit of which the coils of the electro-magnet
form part is closed, either by the clock (which happens every two seconds), by the
observer as he records transits or sends signals, or when signals are received, the
pen is deflected and makes a notch in the straight line on the paper strip.
Electrical Apparatus for Registering Observations and Signals.
This apparatus is mounted on a portable board, and consists of a commutator A,
a Siemens' polarized relay B, a rheostat C, and a galvanometer D, with twelve
terminals and connections as shown in the diagram on Plate V.
A small battery being connected with the terminals a and e, and the terminals
b, c being connected with the terminals of the coils of the electro-magnet on the
chronograph, a circuit is formed either through a, b, c, s, g, f, e when the clock
connects g, f, or through a, b, c, s, t, e when the tongue of the relay connects
s and t.
The circuit is closed by the clock springs through g, f, every two seconds. It
is also closed through s t, by a current) actuating the relay, in three ways :
(l) Recording Transits.
In this case plugs are inserted to make connection in the holes T, T' (" Transits ").
When the tapper is closed between h, i a current passes through the relay from the local
battery along the circuit n, T, U, p, q, d, u, V, h, i, W, T', r to earth ; at U the circuit
divides, and one branch passes through the rheostat C, the other through the galvano-
meter and relay. The branches unite again at u. The rheostat can be adjusted so as
to vary the strength of the current passing through the galvanometer and relay.
(2) Sending Signals.
The plugs are inserted in the holes S, S' ("Sending"). The current passes, when
the tapper is closed, from the main line battery along the circuit k, S, U, p,
128 TELEGRAPHIC DETERMINATION or LONGITUDE, PARIS-GREENWICH, MADE IN 1892.
q, d, u, V, h, i, W, S', /, and along the main line to the other station. The current
divides at U just as in the case of recording star-transits.
(3) Receiving Signals.
The plugs are inserted in the holes R, R ("Receiving"). The current received
from the distant station enters at I, and passes along the circuit I, R, U, p, q, d,
u, V, R', r to earth ; the tapper in this case being open. The current divides,
as in former cases, at U.
In all three cases the rheostat was adjusted so that the deflection of the
galvanometer needle should be approximately the same. It will be noticed that
in each of the three cases the u terminal of the relay, which is a polarized one, is
put to earth, so that the current which actuated the relay when receiving and
sending signals and for recording transits was of the same sign.
VII. METHODS OF OBSERVATION.
The general methods of observation were similar to those adopted in the determina-
tion in the year 1888. The description of the method of observing the nadir and
azimuth given on pp. 23 and 24 applies equally to this determination, except that
in this case the Polar Stars were always observed by the method of moving the
wire, and were never observed by the eye-and-ear method. The programme given on
p. 24 was again adopted, the number of Clock Stars in a group being limited to 6
instead of 10.
VIII. ERROR OF COLLIMATION.
This error was determined by nadir observations and by observations of the
same circumpolar star in reversed positions of the instrument. In the following tables
are given all the results obtained for collimation. In column 1 is the date and the
adopted reading for line of collimation at which the R.A. micrometer was left when
not in use for nadir or circumpolar observations. Columns 2 and 3 give the name of
the circumpolar star and the error of collimation of the middle wire deduced from
observations of that star in reversed positions of the instrument. Column 4 the error
of collimation deduced from nadir observations. These errors have been divided
ERROR OF COLLIMATION. :;<
into groups, and the meaus of the errors from observations of Polar Stars and from
observations of nadirs taken. The adopted collimation error is given in the last
column.
If the adopted Collimation error in the last column be denoted by c, and * denote
the diurnal aberration viz. : O'"20 for Transit E at Paris and O'"l9 for Transit
D at Greenwich, then the whole Collimation error applicable to observations in the
position of instrument West is c + x and in position East c + x.
Transit D.
Dntc and
Adopted
Reading.
STAR.
Deduced
Collimatiou.
(P)
Nadir
Observa-
tion.
(N)
. .. : ', .
N P
Adopted
Collimatiun
Error.
1892.
June 7
( Iroombridge 2283
//
-f O'62
O'l I
tt
a
0-06
n"68o
Groombrids'e yco S.P...
4- Q'^6
O'OO
O* 3Q
. .
* JV
i
+ 0-59
- 0'17
076
June 8
Groombridge 2283. .<
O'lA.
O'7<1
n r -68o
Groombridge 750 S.P
O'C I
0-28
- 0-43
- 0-31
+ 0'I2
June 9
Groombridge 2283
O'2 2
+ o'o6' ->
u r -68o
Groombridge 750 S.P
+ O'o6
O'OO
8 Ursse Minoris . . .
-f- O'l I
+ 0-28
+ 0-03
-0-25
June 13
Groombridee 228? ..
O'2?
+ O'14
n r -68o
Groombridge 750 S P
+ O'l I
O'7Q
8 Ursse Minoris
4- O'l i
'" ,
-
..,,,!
., '
O'OO
- 0-23
- 0'23
June i 5
+ O'62
i i r -68o
June 1 8
O'62
t:H ; ' '
,' i
,.., .i.
n r -68o
- 1-64
-0'55
...
1
GREENWICH OBSERVATIONS, If- 99.
130 TELEGRAPHIC DETERMINATION OF LONOITUDE, PARIS-GREENWICH, MADE IN 1892.
tit L>. continued.
Date and
Adopted
Ill-inline.
STAR.
Deduced
Colliination.
(P)
Nadir
Observa-
tion.
(N)
N 1'
Adoplcd
Collimation
Error.
1892.
+ 2"J.t
O'2 3
"
ft
4- I -07
i i r *7oo
-1- I 'Q7
+ 1-18
4- O'I7
+ 2'20
+ 0-37
- I-8 3
J une 2 3
Groombridge 750 S.P
+ r86
4- 0-06
I I r- 7<DO
4- o'8c
4- i'?z
+ 1-36
+ 1-24
0-12
.June 24.
-f- o'o6
+ I'O2
i i r- 7oo
8 ITrsiP Minoris .- ... . ...
4- O'^O
4- o'o6
1
|
+ 0-23
+ 0-99
+ 076
June 26
Groombritl< r <> 750 >S.P
-1- 2-6c
+ i '47
I I'''7OO
8 Urssfi Minoris . ..
_(- I'C2
4- i'47
+ O'62
+ 2-09
+ 1-18
O'gi
Groombrid <f *3 2283 . .
-4- r;8
4- ITS
I I r '7OO
Groombrid"e 750 S.P
+ 2-26
4- O'7Q
8 Ursa; Minoris
4-1*11
X Ursu- Minoris .. ....
+ 2 "2O
+ 1-79
+ 1-27
-0-52
June 29
8 Urste Minoris '.
+ r86
4- O'34
n'-yoo
Cephei 5 1 S.P. .. .
+ 1 "4.7
4- O'CI
+ '85
+ 1-67
+ 0'57
I'lO
June 30
Groombridge 750 S.P
-4- 2*4.^
4- 070
n r -7oo
8 TJrsa; Minoris
4" I 'Q2
4- 0-45
4- 0'68
+ 2-18
+ 0-64
- i'54
Date aud
Adopted
Reading.
ERROR OK COLLIMATION.
Transit D. continued.
STAR.
Deduced
Collimation.
(P)
Nadir
Observa-
tion.
N 1'
131
Adopted
Collimation
Error.
1892.
July i Groombridge 750 S.P + 1*07
1 1 < 7 oo t U rase Minoris
S Ursae Minoris + i'i8
Cephei 51 S.P + i'35
+ 1-13
July 2 8 Ursse Minoris + i"5*
i i r 7oo
+ 1-52
July 8 K Ursae Minoris 0-17
ii r -68o Cephei 51 S.P '39
0-28
July 9
i i r -68o
July ii S Ursse Minoris 0-28
n r -68o Cephei 51 S.P - 079
0-54
July 15
ii r -68o
July o
n r -68o
July 22
n r -68o
4-079
+ 0-34
0-57
+ 1-24
'"33
o-oo
O'OO
+ O'l 1
- 1-13
0-56
-0-85
- 0-68
- '34
-f 0-23
0-56
0-19
0-28
-0-31
+
0-06
The line of collimation of Transit D. adopted in the reduction is the same through-
out, and corresponds to a reading of the micrometer 10 r '68l.
18i2 TELEGRAPHIC DKTERMINATION: OF LONGITUDE, PARIS-GREENWICH, MADE IN 1892.
Transit E.
l"l.i.,,l'.
Date ;i in 1
Adopted
Reading.
rrarr: . ., .,
STAR.
Deduced
Colliniation.
(P)
Nadir
Observa-
tion .
(N)
N V
Adopted
Collimation
Error.
1692.
June 7
ft
O'^J.
"
'ft
0*03
i i r '4.6o
4- 0-28
!
0-03
.'..
June 8
|.i , - .
Polaris S.P
O"62
O*I I
4- o-oo
l* r -4.co
Groombridge 2283 .'
4- i'c8
+ O'3O
Groombridge 750 S.P
~r i ^o
J. 2-76
* 3V
+ O'1 1
" J
; " :; : i .'"' '." : ;.
+ 1-15
+ 0-17
0-98
June 9
Polaris S.P ,'...'
- O* I I
4- 0-62
; ..._
n r< 4.co
Groombridge 2283
4- o - c6
. . . .' ..>..'
O"I7
+ O*7 1
+ 0-23
+ 0-39
4- 0-16
June 1 1
Polaris S.P......!.... '.'...
0*2 1
O' I I
4- O'CI
I3 r- 5oo
Groombridse 2283...
M *J
+ t*IO
& Ursa- Minoris
0-28
4- 0*8 c
4- 0-86
+ 0-37
- '49
June 12
8 Ursa Minoris
4- I '/tfi
O" I 7
i3 r- i;oo
+ O*7Q
w JV
+ I^
+ O'll
- '35
June 13
I'olarisS.P
_i_ o'8c
+ 1 *O2
I* r -COO
Groombridge 2283
+ O'7Q
S Ursse Minoris
4- o'cfi
+ O-A C
-
.. >;'.:;: .;,-:,..;,:
+ 0/64
+ 0-75
+ O'l I
June 15
Groombridge 750 S.P %
^T^
4- o - c6
i* r -coo
S TJrsse Minoris
4- O'cfi
+ o*c
+ o- 99
4- O-JI
- o- 4
ERROR OF C!OLLIMATION.
133
Transit E. continued.
Date and
Adopted
Reading.
STAR.
Deduced
Collimation.
(P)
Nadir
Observa-
tion.
(N)
N P
Adopted
Collimation
Error.
1892.
June 1 8
I3 r ' 4 20
June 23 Groombridge 2283 0-51
I3 r -420 Groombridge 750 S.P OMI.
8 Ursae Minoris..; 0-73
0-45
June 24
13^-430
June 26 Groombridge 2283 0*34
I3 r '43o Groombridge 750 S.P 0-39
June 27 Groombridge 750 S.P 0-62
!3 r '43O 8 Ursae Minoris O'6.8
0-65
June 29
I3 r -430
June 30 Groombridge 750 S.P 0*06
July i Groombridge 750 S.P 0-17
i3 r '43O 8 Urs Minoris 0-28
0-23
July 2 Groombridge 750 S.P 0-45
July 6 Groombridge 750 S.P +0-17
i3 r '4OO 8 Ursae Minoris :..! i'4i
0-62
... 0-56
. . o-i i
-0-45
- 0- 45
+ 0-23
- 0-17
-0-17
0-06
0-06
0-28
0-28
o-oo
O'2O
+ 0-59
O'22
0-06
0-06
0-17
O'OO
i -80
*-i4
1-69
1-88
- 1-26
0-62
0-06
- 175
134 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1892.
Transit E. continued.
Date ami
Adopted
Reading.
STAR.
Deduced
Collimation.
(P)
Nadir
Observa-
tion.
(N)
N P
Adopted
Collimation
K.rror.
1892.
July 7
<
O'AC
"
/
o'o6
i 3 r '43o
O'l^
>
- o'34
July 8
Groombridge 750 S.P
+ O'7O
O'I7
M r '4io
t Ursae Minoris
O'27
O'2^
+ I*O7
O'4.C
Cephei 51 S.P
4- 2-76
+ I-IO
0'28
-1-38
July o
Groombridge 750 S.P
4. 7-6 1
4- 0*06
I3 r '<n
e Ursae Minoris
-f 0'84.
O'3A
8 Ursae Minoris
+ O"4.C
+ 1-63
-0-14
- '77
July 1 2
8 Ursae Minoris ....
-4- 0*62
G'2 3
+ O'AC
i V - 6co
O*I7
+ O'C I
u >'
-|- 0-68
+ 0-23
4- 0-32
+ 0-09
July i 3
Groombridge 7508.?
+ l'tO
4- O'ci
I3 r -6;o
8 Ursae Minoris
4- O'J.C
+ O'77
X Ursae Minoris
4- O'4.C
+ 0-73
4- 0-62
O'll
July 15
8 Ursae Minoris
+ 0-84.
O'I7
+ POI
Groombridge IIIQ
-1- 2*14.
+ O*o6
I3 r -6oo
Groombridge 3548 ....
+ -i'OA
4- 0*06
+ 2'OI
O'O*
- 2-03
July 1 8
i3 r '4-5
+ O'2?
.
July 21
Groombridge 31:4.8...
-(- O*I7
+ O'28
39
i3 r '45o
4- o-c6
O'l I
+ 0-17
4- 0-24
+ 0-07
ERROR OF COLLIMATION.
135
Transit E. continued.
Date and
Adopted
Reading.
STAR.
Deduced
Collimation.
(P)
Nadir
Observa-
tion.
(N)
N P
Adopted
Collimation
Error.
1892.
July 22
Ursss Minoris ... .
//
+ o-ei
It
+ 0-28
ft
n
+ '39
H r 'ACO
Gephei 51 S.P.
+ 2'IA
X Ureae Minoris
T * '^
+ o-c6
A- O"4.C
+ o - o6
+ 0-9
+ 0-17
- o-75
The object-glass of Transit E was taken off and cleaned on June 18.
July 6. The Adopted Collimatiou Error for the five stars observed with R.A. Micrometer i3'4io was "'i9-
July 15. The Adopted Collimatiou Error for the seven stars observed with R.A. Micrometer 13-650 was + 3"'83.
The object-glass was dismounted for examination on July 16.
IX. LEVEL ERROR.
The Level Error was determined several times during each set of observations by the
striding level, and generally at the beginning and end of each evening by the nadir
observation. In the latter the pivots were assumed to be sensibly equal (see p. 126),
and the simple difference of the readings of the R.A. micrometer for coincidence of
the middle wire in reversed positions of the instrument was considered to be twice
the error of level. The difference between the level error as found from nadir
observations and with the striding level is shown in the following table ; columns
W+E
N
W+E
z
2
Transit D.
Transit E.
Transit D.
Transit E.
1892.
June 7
8
9
I I
If
- *'S7
0-81
- 077
+ 0-57
+ 0'O2
O*O I
1892.
July i
2
July 6
//
+ 0-48
+ 0-65
//
+ 0'57
+ 0-90
0-16
12
7
+ 0-62
13
i e
0-90
+ 0-4I
+ Q'AC
8
+ o'4
+ O-22
+ '45
4- l-A.6
w ^-5
ii
12
+ o'99
+ ox>o
I 9
+ 0-14
"5
*4
6
*7
+ '33
+ 0-15
4- 0-26
+ 0-08
+ - H
+ '7
'5
21
22
o-oi
0-8;
+ '7
- 0*37
+ O'2O
9
?o
4/- 0-90
+ o*c6
+ O'7 I
+ 0-004
+ 0-298
136' TELEORAPHIC DETERMINATION OF LONGITUDE, PARIS -GREENWICH, MADE IN 1892.
2 and 3 are found by taking the means of the level errors found by the striding level
in the two positions of the transit instrument West and East, and subtracting tlie mean
of these ( ^ ) from the mean (N) of the errors determined by nadir observation on
the same evening.
In default of any explanation of these discordances it has seemed advisable to adopt
a weighted mean of the errors as found by the nadir observations and by the striding
level. To each nadir observation a weight of 2 has been assigned, to each observation
by striding level a weight of 1, and the mean with these weights has generally been
adopted as the level error for the whole of the evening. In some cases where it appears
that the level changed during the evening the observations have been divided into
groups and a mean adopted on the following plan. Between the results of the nadir
observations at the beginning and end of the evening a value of the level error has been
interpolated, corresponding to the mean time of a group of stars, and this interpolated
value has been given a weight of 2, and combined with the values found by the striding
level during the same group, each with weight 1.
Transit D.
1
n ( Sidereal
.,**** Time.
Striding Level.
Nadir.
Adopted
Level
Error.
Date.
Sidereal
Time.
Stridin;
W
; Level.
Nadir.
Adopted
Level
Error.
W
E
E
1
1892.
b in
H //
"
"
1892.
h m
"
n
H
n
June 7
15 o
+ 6-87
June 9
15 3
(- 0-03)
'5 55 4 9' 2 4
+ 8-13
'5 45
44'5
1 6 10 i -f 10-45 !
16 10
4 4-56
16 30 .
+ 7-68
16 30
4 576
i .
'6 35
4 476
+ 5-20
17 50
4 570
June 8
14 10
+ 4'3
18 10
4 4'57
14 30 + 5-48
18 15
4 5-84
14 40
+ 5'55
15 15
+ 5^8
+ 5-18
15 25 1+ 5-84
June 13
14 20
4372
16 10 + 5-54
14 40
4 4'3'
16 20
+ 5'43
H 45
4 4'5 8
+ 4'94
1510
4 4'47
'5 '5
4 4'39
June 9
'4 30
+ 3 '04
15 50
4 5-86
14 40
4 3'45
15 55
4 7*84
14 50 + 3-36
+ 3-66
16 15
4 6-34
15 10
+ 3'73
18 o
4 57'
The determination on June 9 at I5 h 30 has not lieen used.'
On June 9 for observations from i6 h io m to iS h 15, the adopted level error is deduced entirely from determinations
with tlie striding level.
ERROR OP LEVEL.
137
Transit D. continued.
Date.
i
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
W
t
E
W
E
1892.
h m
i
,
"
18^92. ] t in
n
ft
ft
..
June 1 3
18 30
+ 5*88
+ 567
June 24
16 IO
- 1-46
1 8 40
+ 6-13
16 55
2-21
;.
18 50
+ 5'57
17 9
2'O6
'7 35
ro6
1-42
17 40
- '-55
June i 5
15 50
2-89
18 35
'97
15 55
- 4-6,
-3'33
1 8 40
I'22
1 6 40
18 45
-0-31
June 26
1515
-4'20
June i 8
14 50
15 o
- 3-81
-2-87
-3-18
15 3
15 35
- 4' 2 7
-3-97
-37'
15 50
- 2-88
16 5
- 3'H
June 19
15 o
I-2I
P2I
16 55
2-80
17 25
- 3'9
'
-2-85
June 20
14 o
i
-3-24
'7 45
17 co
2 "60
15 o
5-00
/ J
1 8 o
- 276
15 5
- 3-82
-3'93
18 25
2-05
15 25
15 40
- 4-12
- 4-97
18 50
iq 10
- 2-26
- 1-66
-I-8 7
1611;
4*O7
7
Q
j
T /
iq 10
! " I o
1 6 40
- 4V
7
17 15
18 10
I 8 20
1 8 40
(+ i '46)
2156
i
- 3-88
-1-97
-3-27
June 27
15 o
15 25
15 30
15 50
1-90
- 2-82
-3'49
i
-2-83
'5 55
- 3'39
June 23
15 o
-2-98
16 5
2'6 1
15 30
3'3 2
17 o
- 2 '49
2 '33
15 35
2-72
'7 5
2-61
'5 55
- 3' 2 4
.17 30
- 2-50
16 35
2-89
18 15
- 1-85
17 o
7 35
i
. : 3-07
;- 2'6l
-2-48
-
'9 5
19 10
0-86
0-90
-6-86
18 20
I'55;
19 25
0-29
18 25
2'II
I 1 .
19 30
o - 45
18 55
1-25
'9 45
0-20
18 58
- 1*04
19 o
-2-45
June 29
16 50
0-68
..< .
16 55
i -24
17 20
- 1-81
June 24
1
15 o
^274
17 25
- 170
i
15 3
3'i6
270
17 35
- 1-92
'5 '55
2-80
18 o
I'S 1
-1-19
I
The determination uo June 2o d i8 h io m has not been used.
The determination by Nailir on June 29 at i6 h 50 and i6 h 55 m have been combined.
-I
GREENWICH OBSERVATIONS, 1899.
138 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1892.
Transit D. continued.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
W
E
W
E
1892.
h m
"
n
"
"
1892.
h m
-
'
"
-
June 29
18 20
- 2-17
1-19
July 8
16 30
~ 4-' s v
18 25
- 2-58
17 o
^~ 4-" I Q
18 40
'7 35
-3-01
-3'4
18 55
0-62
17 45
- 2-81
19 o
0-17
18 10
"* 2 "Q o
19 15
- 0-51
18 55
- 2-30
June 30
15 40
3-80
July 9
-4- o * C 3
+0-55
15 5
J-^2
16 10
3*67
16 30
- 3-28
-3'54
July 1 1
1 6 40
~4~ ^*Q 1
17 o
- 3'93
17 o
+ 371
17 40
- 3 '99
17 5
+ 3''6
18 5
2-20
17 25
+ 27*
18 40
2'II
'7 45
+ 3'*4
18 55
- 2-04
2'O2
18 10
+ 3'68
+ 3-54
19 10
- 2-0 4
18 15
+ *'S4
19 20
-1-72
18 25
+ 3-I7
18 55
+ 3'i8
,
19 o
+ 3-62
July i
15 30
5'26
19 25
1 A ' C O
IS 35
- 4-67
'5 55
- 5'33
-4-56
16 5
- 4'39
16 45
- 5-16
July 1 5
16 35
+ *'49
17 o
- 4'57
16 55
+ 2-48
17 35
- 4'55
17 15
+ *'45
+ 2-85
18 10
- 2-82
17 20
+ 3-04
18 25
- 373
17 40
+ 3 '6*
19 o
- 2-65
-2'80
'9 5
2 -79
19 10
1-89
July 20
17 o
+ 4''7
17 5
+ *'95
July 2
15 40
-4'93
18 10
+ 3-38
+ 3-82
15 50
- 575
18 15
+ 4-11
16 45
- 4-10
18 20
+ 4'H
17 o
- 4-48
17 40
- 4-12
18 o
- 3'99
-3-90
18 25
3-80
July 22
19 50
+ 3'9 2
18 40
- 3-62
'9 55
+ 3''4
19 20
3-80
to o
+ 3-18
+ 374
9 45
- 3-36
20 10
+ 4-i3
19 50
-1-91
20 15
+ 4'9
ERROR OF LEVEL.
Transit E.
Dtte.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
Date.
Sidereal
Time.
Striding Level. , ,
Nadir.
Adopted
Level
Error.
W
K
W
E
1892.
h m ,, "
i
<
1892.
h m
"
"
IT
H
June 7
18 O
1 8 20
-0-42
I'll
0-82
June i 2
18 15
18 20
+ 0-64
(+ 0-85)
+ 1-60
18 40
I- 2* CO
June 8
13 5
13 10
I -08
-0-34
18 45
18 50
I i "Q7
+ 2-65
'3 35
- 1-19
'4 5
14 20
- 0-88
- 0-88
June 13
'3 4
14 o
+ 2-16
+ 2-68
'4 55
15 10
15 40
;t- 1-97
0-89
-1-13
-, 3 8
14 3
'4 55
1C IO
+ I -60
+ 2-52
+ 2-13
i5 55
16 20
1 6 40
- *74
0*90
1-98
j
15 40
16 o
16 10
+ 0-98
+ 2-22
-M'54
+ 2-33
18 10
- 3-05
IT n
18 20
1-80
17 o
17 20
+ 1-86
June 9
13 o
13 40
1-69
-2-31
18 5
'9 5
19 40
+ 3-03
+ 2-66
+ 2-56
14 20
2'OO
H 3
1-51
15 o
15 40
'I 55
16 20
- 2-48
- 1-83
- '54
-1-30
-1-82
June 15
15 20
'5 3
15 40
1 1 n
+ 1-16
-f-2'II
16 co
- 1-68
17 o
4
J
17 20
1 O' ^ V
17 10
-175
17 40
+ 1*90
+ 1-33
'7 55
2-22
18 o
+ 1-36
'-
18 o
18 20
I
-1-86
18 30
18 50
+ 0-84
+ 0-65
18 55
+ 0-65
June 11
13 10
-1-94
"9 5
+ '49
'3 45
- rji
14 30
2'22
H 45
2'22
June i 8
14 50
+0-34
o-oo
>5 15
3-80
86
15 o
0-67
16 20
- 3-48
~ 2
16 40
- 2-52
,
1 6 40
- 3-I3
1 8 20
3-15
June 23
15 25
+ 0-60
19 o
-3-80
15 30
0-07
'5 4
- 075
June 12
17 10
+ 1-28
15 50
- 0-23
17 50
+ 0-28
16 15
0-76
i
June 9. The determination by Nadir at i5 h 55 was made in the West position of the instrument only. Weight i
has been assigned to this.
The observation on June i2 d i8 h zo m depends on a doubtful entry. This has not been used.
140 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1892.
Transit E. continued.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adoptet
Level
Error.
Wl
E
W
E
1892.
h m
//
ft
tr
1892.
h m
//
"
//
June 2 3
16 40
+ *'3S
+'35
June 30
'5 55
+ I'O2
16 50
+ Q'97
16 o
+ 0'49
17 10
+o-3
16 15
+ 0-69
17 40
+ i'i9
16 20
+ 0-99
+ i'*6
7 55
+ 0-58
1 6 40
+ 1-83
18 10
0-64
17 o
+ '74
18 50
+ 0'88
17 5
+ '-34
>7 45
+ i-3*
i7 55
+ 0'95
June 24
16 30
+0-70
16 50
+ 0-33
17 20
+ i'3
+0-78
July i
16 10
+ 17'
17 40
+ 0-75
16 15
+ 1-28
'7 45
+ 0-89
16 25
+ 2-22
1 6 40
+ 0-15
16 45
+ 0-60
June 26
1510
+ 0-18
17 25
4- 2-30
+ '77
15 25
+ 072
'7 3
+ -S5
5 45
+ 3'2i
18 15
+ 1-40
i .
'5 55
+ 2-86
18 20
+ 2-84
16 15
+ 0-96
+ 1-4
18 25
+ 2-21
16 40
4- 1-04
16 45
+ 1-41
17 o
18 10
+ 0-99
+ 1-17
July 2
'I S5
16 5
+ 1-15
+ 74
16 30
+ 0-74
June 27
>5 45
'5 55
16 10
16 20
+ 1-64
+ 1-17
+ z '94
+ *'i4
1 6 40
17 o
'7 5
17 30
+ '43
+ 17
+ '"34
4-I-9I
+ I'OI
1 6 40
16 45
17 o
+ 0-60
+ 176
+ 1-58
+ '49
17 40
>7 55
18 o
- 0-15
+ 0-39
0-09
17 20
+ 0-92
i :
18 10
+ 079
18 20
+ 1-22
July 6
15 50
+ 2-90
1
16 10
+ 1-56
- l
t
'6 35
+ 2-89
June 29
16 25
+ 171
16 45
+ 3'4 2
1 6 40
+ '85
+ 1-85
17 o
+ 3-20
+ 3-13
17 o
t
+ 2-39
17 30
+ 3-30
17 40
+ 3'44
18 o
+ 3-86
June 30
15 35
+ 0-66
18 10
+ 3-06
15 40
+ 2'20
18 15
+ 3-33
ERROR OF LEVEL.
1-4.1
Transit E. continued.
Date,
Sidereal
Time.
Striding Level.
Nadir.
Adoptee
Level
Krror.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
W
E
W
E
1892.
h m
"
"
1892.
h m
if
. ' .
n
July 7
i5 35
+ 3-46
July 1 1
16 10
+ 2-40
'5 55
+ 2-36
16 25
+ 3-05
16 20
+ 2-93
16 45
+ 3'35
>6 35
18 30
+ *73
+ 3-09
+ 3-05
16 50
i7 35
+ 2-61.
"8 35
+ 3-27
i7 55
+ z'H,
'9 : 5
+ 2-39
I 8 20
+ 2-07
19 10
+ 3-38
'9 5
19 20
+ 1-61
+ 1-56
'
i
+ 2-29
'
19 35
+ z '59
July 8
'5 45
+ 3-10
19 50
+ 2-06
16 o
+ 3'59
19 50
+ 1-97
16 ib
+ 2-91
1 6 35
+ 2-61
<
f ' '
17 .0
+ 3''5
July 1 2
5 30
+ 271
17 25
+ 2-90
'5 45
+ 2-28
17 40
+ 2-06
+ 2-48
16 30
+ 3-56
18 b
+ 2-65
17 o
+ 3''4
1 8 20
+ 1-84
17 25
+ 3'45
1 8 40
19 o
+ 1-52
+ ''97
18 10
18 50
+ 1-91
+ 2-27
+ 2-65
19 20
-f I'Ji
'9 5
+ 1-24
19 3;5
+ 2-06
19 50
+ 3'4 6
19 55
+ 3'12
20 IO
+2-28
July 9
'5 55
+ 3^7
16 o
+ 3''8
16 10
+ 2-36
July 13
16 o
+ '75
16 25
+ 2-05
1 6 40
+ 1-69
i
16 50
+ 1-86
16 55
+ 1-48
17 o
4- 3-00
7 55
+ 2-41
-
17 25
+ 2-90
, 2
18 o
+ 2-22
17 30
+ 3'39
94
18 10
+ 1-15
+ 177
'7 45
+ 3'3*>
'9 5
+ 2-70
17 50
+ 3-14
19 25
+ 1-13
18 10
+ 2-54
19 50
+ i-35
1 8 40
+ 2-68
'9 55
19 30
+ 3-09
20 25
+ 1 '97
.:','
'
19 35
+ 3'39
July 15
15 25
+ 3-"
July 1 1
15 40
+ 3-66
15 1,0
+ 2-36
'5 45
+ 3-52
15 50
+ 0-50
15 50
+ 2-92
'5 55
+ 1-52
'5 55
+ 3'
+ 3'i8
16 30
+ 1-92 1
16 o
+ 3-'8
'7 '5
+ 2-94
' 3,
-
'.i ... . ,.
14'2I TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS GREENWICH, MADE IN 1892.
Transit E.- continued.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adoptsc
Level
Error.
Date.
Sidereal
Time.
Striding Level,
Nadir.
Adoptee
Level
Error.
W
E
W E
1892.
h m
ft
"
1892.
li in
.
</
rr
July 1 5
18 20
+ 1-75
July 2 1
20 5
4 2-24
18 30
+ 1-86
20 25
4- 1-65
19 20
+ 1-28
+ 1-62
2O 50
+ ''92
19 40
19 50
(+ 5-50)
+ 2-71
21 2 5
21 50
4 2-94
42-30
20 25
4- 1-90
, " : i
22 25
4- 2-85
20 45
+ i-4'
: i
22 30
+ 2-66
21 IO
+ 0-27
n
22 50
4 3-28
21 30
+ i '39
22 55
4-2'34
21 45
+ o'44
23 o
4-2-20
21 55
4-0-65
July 1 6
Ij 20
+ 2-54
July 22 i 17 o
+ 2-54
1 5 30
+ 2-79
+ 2-92
17 15
+ 2-06
j
'5 4 :
+ 3-55
'7 45
+ '9S
i
'7 55
4- 0-86
"8 35
+ 3'3<>
July 1 8
'7 45
+ 1-63
18 50
4 2-33
*
17 50
+ 2'10
+ I"99
'9 5
4- 2-79
18 10
4- 2-61
19 40
+ 3'4^
.
.-. i
19 50
4- 2-62
,,
July 20
1 8 25
4-2'o8
'9 55
4- 2-31
1 8 30
+ 1-51
)| |
+ 1-88
21 IO
4 2-96
8 35
+ 1-86
21 45
+ 17'
21 50
4 2-40
' ,[;,
22 3O
4 2-31
, ,
July 2 1
1-7 50
+ i75;
22 35
4 1-69
,
20 o
+ i-9 '
22 40
+ 2-54
July 15. The determination at 19'' 2o m has not been used.
X AZIMUTH ERROR.
The azimuth of the instrument was determined by observation of one or more of
the following Polar Stars. The first column contains the name of the star taken from the
Greenwich Catalogues. In the next two columns are given the approximate N.P.D. and
the mean K A. for 1892'0 as given in the Connaissance des Temps. The fourth column
contains corrections to this mean R.A., deduced from the places given the Greenwich
Five Year Catalogue, 1890, except in the cases of Bradley 1399, the correction for
which is deduced from the Greenwich Ten Year Catalogue, 1890, and of 24 Ursae
Minoris, the me;m place of which given in columns 2 and 3 is taken direct from the last
mentioned Catalogue.
AZIMUTH ERROR.
143
Star's Name.
Approxi-
mate
N.P.D.
Mean R.A.
1892*0
given in C.T.
Adopted
Correction
toR.A.
Star's Name.
Approxi-
mate
N.P.D.
iMeaii 11. A.
1892*0
given in C.T.
Adopted
Correction
toR.A.
Polaris . ,
t
i 16
h m a
I IQ l6'8A
i
-f- 0-82
Bradley 1 399
* /
C 12
k m
IO I 3 52'QO
+ 0-6 1
Ciroombridge 750..
Cephei 51.
4 44
2 J.7
4 247-96
6 4.Q A7"2 I
O'26
I "3O
t Ursae Minoris
7 47
16 57 3-06
- o-54
8 Ursss Minoris....
3 -3
1 8 7 9'*o
0-63
Groombridge 1119
Ursse Minoris ...
i 3
II 5 2
749 4'59
547 55'9
+ 3-93
O'62
24 Ursae Minoris...
3 o
1810 46 1 6
/J Ursae Minoris ...
15 24
1451 1-28
+ 0-05
X Ursse Minoris ...
I 2
19312 4-00
+ 0-30
Groombridge 2283
2 2,
15 12 9'10
- i'57
Groombridge 3548
3 *S
21 21 6*44
0^46
The observations of transits have been reduced to show clock error by the formula
R.A. = Observed Time + c sec. S + n tan S + m + Clock Slow :
$ being the declination of the star, c the whole collimatiori ;is defined on page 129,
n the deviation (in arc of a great circle) of the line of collimation from the meridian
when the instrument is set at the altitude of the pole, m the deviation when it is set
on the equator. For convenience in computation m and n are expressed in seconds
of time.
The following table exhibits the computation of the quantity n. The second column
contains the names of the stars used for the determination. Column 3 gives the
position of the instrument in which each was observed. Column 4 shows the seconds
of the difference between the R.A. for the day (with the above corrections applied) and
the observed time on middle wire corrected by application of the quantity c sec S,
and for clock-rate. No correction for difference of personal equation in observing
Polar and Clock Stars (see p.45) has been applied. The next column shows the tangent
of the declination of each star being the factor of n. Subtracting the lower of each
pair of lines from the upper in columns 4 and 5, the quotient of the difference in
column 4 divided by that in column 5 gives the value of n found in column 6. The
simple mean of all such values found on any night has generally been adopted for
reduction of the whole night's observations and is given in the last column.
144 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1892.
Transit D. Greenwich.
Values of n.
Date.
Names of Stars.
Position.
Tabular
H^-
Observed
Transit.
Factors.
n
Observed.
n
Adopted.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n
Observed.
tl
Adopted.
1892.
June 7
June 8
Jane 9
W
E
E
E
E
E
W
W
W
W
E
E
E
E
W
W
W
W
W
W
E
E
W
E
E
E
E
E
W
W
I
+ 54''9
+49"55
+ 52-04
+49-08
+457*
+ 49-04
+ 46-48
+49'5
+45-88
+49' 2 7
+ 4675
+ 49-40
+ 4974
+ 49'4>
+ 50-46
+ 49" 2 7
+48-24
+ 49 '94
+ 39' 6 7
+ 4979
+ 398
+ 49-68
+ 52-45
+4977
+ 53-o8
+49-83
+46-72
+ 49-57
+47-09
+49'56
+ H-36
+ 1-69
+ 24-36
0-29
12-09
0'2O
I2-O9
O'O6
+ 24-36
+ 0-86
+ 24-36
+ '59
12-09
+ 0-12
I2-O9
O'O6
+ 3^3
- 0-14
+ 24'36
0-28
+ 24'36
+ '59
12-09
+ O-I2
12-Og
0-06
+ 16-88
+ 0-04
+ 16-88
0-05
8
+ 0-205
+ O'I22
+ 0-280
+ 0-213
-0-145
O'l II
O-O27
-0-099
-0-451
0-411
-0-415
C-22O
O-27O
D-I70
0-146
8
+ 0-205
O-O96
0-426
-0-329
O'2O2
1892.
June 1 3
June i 5
June 20
ft Ursse Minoris....
8 Librae . . ....
E
E
E
E
W
W
W
W
E
E
E
E
W
W
E
E
E
E
E
E
W
W
E
E
E
E
E
E'
W
W
+ 49-5I
+ 4979
+ 49-36
+4977
+ 48-88
+ 49-83
+ 47'8i
+ 49'45
+ 48-12
+ 49-66
+ 5>-43
+ 49-61
+ 5.'77
+ 49-52
+ 46-87.
+ 49'49
+47-01
+48-90
+ 36-82
+49-10
+ 52-63
+49-11
+ 54-8i
+ 49-49
+ 47-02
+ 49-39
+ 42-68
+ 49-37
+ 4473
+ 49"'5
+ 3-63
-0-14
+ 24-36
+ 0-52
+ 24-36
+ i'6 9
I 2 '09 .
O-2O
~ I2-09
~ 0-35
+ I6-88
O-O6
+ 16-88
o'i6
+ 475.
- 0-25
+ 3-63
+ 0-86
+ 24:3$:
+ .'5 2
12-09
O'2O
,>I 2-09
0-36
+ 7-3,i
0-28
+ 16-88
- ^0-38
+ 16-88
0-05
8
-0-077
0-017
-0-045
+ 0-053
+ 0-127
-0-524
0-488
-0-342
i Draconis
Groomb. 2283
Groomb. 2283
ilt Bootis
3 Libra:
Groomb. 750 S.P..
51 Librae
Groomb. 2283..
+ 0-I38
+ 0-I3I
+ 0-107
+ 0-I32
-0-524
-0-683
-0-5I5
0-298
-0-454
O-3I2
-0-387
0-26l
Groomb. 750 S.P..
S Ophiuchi
Groomb. 750 S.P..
Groomb. 750 S.P. .
v' 2 Scorpii
Groomb. 2283
ft Bootis.
8 Ursafi Minoris
8 Ophiuchi
Groomb. 2283......
8 Urs<u Minoris....
2 Aquilse . ...
Groomb. 750 S.P. .
a. Serpentis . .
Ursa- Miuoris
48 Librsp
Groomb. 750 S.P..
8 Ophiuchi
. . . ' ' ' !'-
ft Ursse Minoris . . .
8 Librae
ft Ursa? Minoris....
ft Bootis
Groomb. 2283',
v l Librae .
Groomb. 2283
Groomb. 2283......
i) Coronae.
Groomb. 750 S.P. .
5 i Librae
Groomb. 750 S.P. .
a Serpentis
Groomb. 750 S.P. .
\1/ Ophiuchi
Groomb. 750 S.P. .
8 Ophiuchi ...'..
t Ursae Minoris....
8 Ursae Miiioris
^Ophiuchi.. -'....
8 Ursiu Minoris ....
Ophiuchi .
8 Urs?e Minoris
rj Serpentis
8 Ursse Minoris
77 Serpentis
L AZIMUTH
Transit D. Greenwich continued.
Values of n.
145
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
1
n
Apparent.
n
Adopted.
1892.
June 23
June 24
June 26
jroomb. 750 S.P..
W
W
E
E
E
E
E
E
W
W
W
W
W
W
W
E
E
E
W
W
W
W
E
E
W
W
W
W
E
E
E
E
8
+ 53'5
+ 49' 6 5
+ 54-8o
+ 49"35
+46-55
+ 49-50
+44-11
+ 49-60
+43-63
+ 49-42
+ 43-48
+ 49'35
+ 5373
+49''4
+43-22
+ 49-29
+ 50-13
+ 48-96
+ 5'77
+ 49-33
+ 47'9*
+49-27
+ 49-43
+ 49-16
+ 15-52
+ 18-87
+ H"*9
+ 15-52
+ 26-81
+ 18-24
+ I4-34
+ 18-77
12-09
- 0-41
12-09
+ 0-62
+ 7-31
+ 0-17
+ 16-88
- 73
+ 16-88
0-05
+ 19-03
0-38
-20-57
+ o'66
+ 24-36
+ 0-51
12-09
+ 475
12-09
o-oo
+ 16-88
0-27
+ 16-88
+ 0-80
+ 4-75
- 0-41
12-09
+ 475
12-09
+ 0-62
+ 7'3'
0-50
-0-329
-0-429
-0-413
0-311
-0-342
0-302
O'2l6
-0-254
0-070
O-2O2
-0-079
+ 0-016
0-651
0-521
-0-674
-0-571
>
-0-335
-0-175
0-084
0-615
-0-519
1892.
une 26
June 27
June 29
8 Ursae Minoris. ...
3 Sagittarii
E
E
W
W
W
W
W
W
E
W
W
W
W
W
E
E
E
E
E
E
W
W
W
W
W
W
E
W
W
W
E
E
8
+ 10-88
+ 18-62
+ 11-91
+ 18-39
+ 10-98
+ i8'39
+ 24-12
+ 18-18
- 1-61
+ i9'*3
+ O'l I
+ 19-01
+*5'59
+ 15-83
+ 27-86
+ 18-65
+ I4-35
+ 18-87
+ 9' 6 3
+ 18-84
+ 9-8'
+ 18-85
+ 9" ZI
+ 1870
- 1-41
+ 1872
- 9^5
+ 1877
+ 16-04
+ 18-90
+ 14-26
+ 19-29
+ 16-88
- 0-53
+ 16-88
0-05
+ 19-03
0-05
-20-57
+ 0-27
+ H'37
- o-35
+ 24-37
0-27
12-09
+ 475
12-09
+ 0-27
+ 7-3i
- 0-34
+ 16-88
+ 0-05
+ 16-88
0-05
+ 19-03
+ 0-24
+ 55-55
+ o-53
+ 55-55
+ 0-05
+ 16-88
- 0-17
+ 16-88
0-05
-0-444
-0-383
-0-389
0-286
-0-843
-0767
0-580
-0-745
-0-591
-0-547
-0-534
-0-505
0-366
0-512
-0-168
-0-297
-0-376
-0-734
-0-599
-0-493
0-245
Groomb. 750 S.P..
8 Ursae Minoris....
77 Serpentis
24 Ursse Minoris...
rj Serpentis
t Ursae Minoris ....
ic Ophiuchi
8 Ursae Minoris ....
Cephei 51 S.P
c Aquilse
8 Ursae Minoris ....
77 Serpentis
Groomb. 2283
24llrs83 Minoris...
21 Sagittarii
Cephei 51 S.P
6 l Lyrae
Groomb. 2283 ...
Groomb. 750 S.P.
Ursae Minoris....
Groomb. 750 S.P.
49 Herculis
Groomb. 2283
Groomb. 750 S.P.
Ursae Minoris ....
Groomb. 7 50 S.P.
c Ursse Minoris....
29 Ophiuchi
8 Ursse Minoris ....
67 Ophiuchi
8 Ursse Minoris .. .
8 Ursae Minoris
T? Serpentis
8 Ursse Minoris . . .
24 Ursse Minoris...
t Aquilae
f Ursse Minoris...
8 Scorpii
X Ursse Minoris....
ft Cveni
r* '-'Jo" 1
X Ursae Minoris
Groomb. 7JoS.P..
Ursse Minoris . . .
Groomb. 750 S.P.
8 Ursae Minoris
v Ophiuchi
t Ursae Minoris . . .
8 Ursse Minoris
77 Serpentis
GREENWICH OBSERVATIONS, 1899.
146 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1892.
Transit D. Greenwich continued.
Values of n.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent
Adopted.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent
n
Adopted.
1892.
June 29
June 30
July i
24 Ursse Minoris..
21 Sagittarii ....:...
E
E
E
E
W
E
W
W
E
E
E
E
E
E
W
W
W
W
E
E
W
W
W
W
E
E
E
E
W
W
W
W
E
E
a
+ n'54
+ 19-18
+ *3-38
+ 19-02
+ 22-26
+ 18-91
+ 21-28
+ 19-30
+ 23-57
+ 18-52
+ 16-52
+ 19-11
+ 15-39
+ 19-17
+ 17-34
+ 18-95
+ 20-66
+ 18-88
+ 28-01
+ 16-11
+ 28-02
+ 18-44
+ 15-12
+ >9'S5
+ 15-26
+ '9'S3
+ 11-71
+ 19-36
+ n-97
+ I9-5 1
+ 25-57
+ '9'33
+ 26-28
+ 19-46
i
+ 19-03
0-38
-20-57
+ 0-66
-20-57
+ O-2O
I 2-09
- 0-35
1 2-09
+ 1-86
+ 7'3'
- o-34
+ 16-88
+ 0-04
+ 16-88
- 0-15
-20-57
+ 0-66
12-09
+ 475
12-09
+ r86
+ 7-31
+ 0-17
+ 7-31
+ 0-26
+ 16-88
+ 0-38
+ 16-88
+ 0-80
-20-57
+ 0-66
-20-57
+ 0-27
8
-0-394
0-206
0-162
0-169
0-362
-0-339
0-225
-0-095
0-081
0-706
-0-686
0-621
0-606
-0-463
-0-469
-0-294
0-328
0-238
-0-134
-0-655
-0-540
-0-389
1892.
July 2
July 8
'
July ii
July 15
July 20
July 22
Groomb. 750 S.P. .
n Draconis
E
E
E
E
E
E
W
W
W
W
E
E
W
W
E
E
E
E
W
W
E
E
W
W
E
E
E
E
W
W
E
E
W
W
E
E
8
+ 30'45
+ 18-5I
+ I4-8I
+ I 9 -85
+ 11-80
+ I9-90
+ I2-78
+ I9-99
+ 30-69
+ I9-4I
+ I7-3 6
+ 21-67
+ I4-30
+ 21-12
+ I4-57
+ 21-49
+ 27-44
+ 21-28
+ 28-30
+ 21-25
+ 21-55
+ 22+6
+ 21-67
+ 22-09
+ 22-68
+22-36
+ 19-79
+22-25
+21-78
+ 22-26
+21-63
+ 22-96
+23-30
+23-55
+ 26-43
+24-22
1 2'o8
+ 1-86
+ 7-3'
+ 0-17
+ 16-88
+ 0-04
+ 16-88
- 0-15
-20-57
+ 0-80
+ 7'3'
- 0-28
+ 16-88
+ 0-38
+ 16-88
0-05
-20-57
+ 0-80
-20-57
+ 0-27
+ 7-3i
+ 0-17
+ 16-88
+ 0-38
+ 16-88
0-05
-20-57
+ 0-66
+ 20-57
+ 0-27
+ 7-3i
0-28
+ 7-3i
+ 0-26
+ 55-69
+ 0-15
i
0-856
0-706
-0-481
-0-424
0-528
-0-565
0-410
0-408
0-288
-0-339
0-128
0-025
+ 0-019
+0-116
+0-023
-0-175
0-036
0-015
a
0-6l7
-0-478
0-461
0-361
-0-045
+ 0-040
-0-175
0-036
O-OI5
Cephei 51 S.P
/Ji Lyras
e Ursse Minoris....
K Ophiuchi
8 Ursse Minoris....
p 1 Ophiuchi
Cephei 51 S.P
o> Aquilae
8 Ursse Minoris....
i Aquilae
Groomb. 750 S.P. .
ft 1 Scorpii
Cephei 51 S P
Groomb. 750 S.P..
77 Draconis
Ursae Minoris
rj Ophiuchi
8 Ursse Minoris ....
96 Herculis
t Ursse Minoris ....
29 Ophiuchi
8 Ursse Minoris
8 Ursae Minoris ....
1) Serpentis
8 Ursse Minoris
1 Aquilse .. . .
Cephei 51 S.P
29 Sagittarii
Cephei 51 S.P
Cephei 51 S.P
fl 1 Lvrse . .
Aquilae
e Ursae Minoris
K Ophiuchi
Groomb. 750 S.P. .
Ursse Minoris
Groomb. 750 S.P..
8 Ursse Minoris....
96 Herculis
8 Ursse Minoris
ij Serpentis
f Ursse Minoris
<c Ophiuchi
Cephei 51 S.P
B l Lyras.
c Ursse Minoris
a Herculis
Cephei 51 S.P
Aquilse
8 Ursae Minoris ....
t Ursae Minoris
r) Ophiuchi
8 Ursae Minoris
a Lyrse
Ursae Minoris....
a Herculis
Cephei 51 S.P
Ol T.TTTm
Cephei 51 S.P
e Aquilse
A. Ursse Miuoris....
a Aquilae
AZIMUTH ERROR.
147
Transit E. Paris.
Values of n.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
il
Apparent.
n
Adopted.
1892.
June 7
8 Ursae Minoris
W
B
+ 48-q3
+ 16-87
a
+ 0'038
8
1892.
June i i
Polaris S.P
W
m 8
+ 18-52
45'O7
8
+ O'7O3
W
-I-48-2Q
o-i c
a Draconis . . .
F
4- ?I'7S
+ l'\1
Polaris S.P
F,
+ 16-77
4.VO7
+ O*734
F,
+ ^0*13
+ 0-36
June 8
Polaris S P
W
+ t7"2O
4.C-O7
+ O'2C I
Groomb. 2283
F,
+ i. 0*02
+ 24/36
+ 0*4.20
+48-4,3
O-2I
a 2 Librae
F,
+ 40 -66
0-28
Polaris S.P
-I- 3 VQ2
AC'O7
4-0*724.
Groomb. 2283 .
W
+i 8-58
+ 24/36
+ O'74.2
+0-708
F
-1- 4.8'6o
+ O"34.
5 1 Librae
W
+ "JO"??
O*2O
ft Ursae Minoris . . ,
20 Librae
E
F
+48-83
+48-1:
+ 3 -6 3
Q'4.6
+ 0-166
Groomb. 750 S.P..
8* Scorpii . . . .
W
W
+ 39-43
+ CO'2C
12-09
O'3C
+ 0*920
Groomb 2283
F
4-4.Q'24.
4- 24.' 3 6
-\-Q'Q'SA
8 Ursss Minoris
W
4-1. 2'74.
+ 16-87
+ o*7 1 1
if/ Booths
F
H-48'44
+ O'C2
77 Ophiuchi
W
+ SO'ii;
0-28
Groomb. 2283
W
+ C4-"33
-|-24.*t6
_|_O*2 1A_
+ 0-176
24. Ursye Minoris
F
4-1. 4-18
+ IO/O2
4-O"727
W
4-4.8-1:6
O'^C
i Aquilae ..
F
+ 1O-23
0-15
Groomb. 750 S.P..
TT Scorpii
W
W
+42-22
+48-30
1 2 '09
0-48
+0-531
June 1 2
8 Urste Minoris ...
96 Herculis
W
W
+ i. 4-91
+ 52-26
+ 16-87
+ 0'38
+0-766
Groomb. 750 S.P...
p Ophiuchi
E
F
+46-73
+48-11
I2-09
O'A3
+0-118
+0-702
8 Ursae Minoris....
t) Serpentis
E
F
+ i. 2-71
+ ?I'Q2
+ 16-87
O-O5
+0-638
c Ursae Minoris...
W
F
+52-27
+ 4.8-60
+ 7-31
+ 0-62
+0-549
June 1 3
Polaris S.P
F,
+ 47-68
4.5-07
+ 0-1 26
F
+ ?V4I
+ 0-52
Polaris S P
W
4- 30*4.4.
AC'O7
-tG'jlI I
Polaris S P
W
+ 4.C-C2
4.C-O7
+ 0-173
T Virginis
F
+ 4.Q'OO
+ O'O4.
t 2 Bob'tis
F,
+ 53-41
+ 0-52
Polaris S P
F
-J-2O"2 C
4.C'O7
4- 0*4.? 4.
Groomb 2283..
F
+ ?7'23
+ 24/36
+ 0-158
Q4, Vircinis . .
F
+ 4-8-7 c
O'l C
F
+ 53-47
+ 0-52
Groomb. 2283
8 Libras
E
F
+55-84
+ 4.8-1:8
+24-36
O'I4
+ 0*296
+ 0-42I
Groomb. 2283
37 Libras ...
W
W
+ 57-23
+ 53'44
+ 24-36
0-17
+ 0-154
24 Ursse Minoris ...
96 Herculis
E
F,
+ 57-28
+ 4.Q'! I
+ 19-02
+ 0-38
+ 0-438
ft Ursae Minoris . . .
E
F
+ 53-95
+ 53'46
+ 3-63
+ 0-52
+ 0-157
+ 0-184
8 Ursae Minoris....
21 Sagittarii
W
W
+ 57-88
+ 48-81;
+ 16-87
o-?8
+ 0-527
Groomb. 750 S.P..
W
W
+ 49'5 2
+ 53'56
I2-O9
+ O-I2
+ 0-331
148 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS -GREENWICH, MADE IN 1892.
Transit E. Paris continued.
Values of n.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
1892.
June 13
June 15
June 1 8
June 23
24 Ursae Minoris...
y Draconis
E
E
W
w
W
E
E
E
E
E
W
W
W
W
E
E
E
W
W
W
W
W
E
E
E
E
W
W
E
E
E
E
8
+ 56-87
+ 53'8l
+ 57-12
+ 5375
+ 55-02
+ 5S76
+ 56-48
+ 5576
+ 55-92
+ 55-67
+ 56-04
+ 55-97
+ 56-39
+ 55-89
+ 57-73
+ 59-24
+ 9-83
+ 6-42
+ 10-19
+ 6-26
+ 3'73
+ 6-38
+ 4-57
+ 6-64
+ 7-i5
+ 6-37
+ 979
+ 672
+ 9-98
+ 6-58
+ 2-68
+ 6-82
+ 19-02
+ 1-26
+ 16-87
+ 0-24
12'og
+ 0-62
12-09
+ 0-62
+ 16-87
+ 0-38
+ 16-87
+ 0-8o
+ IO'O2
o - i6
+ 24-36
+ 0-80
+ 24-36
+ o'59
+ 24-36
0-29
12-09
0-29
12-09
+ 0-68
+ 7-3i
0-29
+ 16-88
+ 0-38
+ 16-88
0-05
-20-57
+ 0-66
8
+ 0-I72
+ 0-203
+ 0-058
-0-057
+ 0-016
+0-004
+0-049
0-064
+ 0-144
+ 0-160
+ 0-225
+ 0-162
+ O'IO2
+ 0-I86
+ 0'20I
+ 0-195
8
+ O-OO6
0-064
+ 0-I72
1892.
June 24
June 26
June 27
June 29
June 30
e Urssu Minoris
K Ophiuchi .
W
W
E
E
W
W
E
E
W
W
E
E
E
E
E
E
W
W
E
E
E
E
W
W
W
W
W
W
E
E
8
+ 8-75
+ 7-93
+ 17-86
+ 11-60
+ 1673
+ H-35
+ 7-83
+ 11-15
+ 8-40
+ 11-03
+ 12-33
+ 11-07
+ 15-62
+ 11-24
+ '03
+ 3-98
+ 0-96
+ 3-86
+ 6-54
+ 3'9'
+ 10-21
+ 4" 22
+ 876
+ 4 <I0
- 3-18
+ 4^5
+ 9' 2 4
+ 6-20
+ 3-08
+ 6-95
+ 7-3'
+ 0-17
+ 24-37
+ 0-67
+ 24-37
+ 0-59
12-09
O'2O
12-09
o - o6
+ 7'3
-o -38
+ 19-03
+ 0-38
12-09
O'2O
I2-09
- 0-44
+ 7-3I
0-28
+ 16-88
+ 0-38
+ 16-88
0-05
-20-57
+ 0-66
+ 7-3i
+ 0-62
1 2-09
0-29
a
+ 0-115
+ 0-265
+ 0-225
+ 0-279
+0-2I8
+ 0-I66
+ 0-235
+ 0-332
+ 0-249
+ 0-346
+0-364
+ 0-275
+ 0-350
+ -454
+ 0-328
a
+ 0-II5
+ 0-231
+ 0-3I 7
+ 0-454
8 Ursae Minoris . . .
Aquilae
Groomb. 2283
Groomb. 750 S.P..
f Herculis
Groomb. 750 S.P..
Hercnlis
Groomb. 2283
rj Coronas
Groomb. 750 S.P..
5 1 Librae .
8 Ursse Minoris ....
96 Herculis'
Groomb. 750 S.P. .
8 Ophiuchi
8 UrsaB Minoris . . .
a Lyrae . ...
t Ursse Minoris
Ophiuchi
24 Ursse Minoris...
24 Ursse Minoris...
96 Herculis
Groomb. 2283
/JBootis
Groomb. 750 S.P..
51 Librae
Groomb. 2283
17 Corona 1 .
Groomb. 750 S.P..
i Q Scorpii
Groomb 2283
3 Libra;
Ursaa Minoris
1) Ophiuchi
8 Ursse Minoris....
96 Herculis
Groomb. 750 S.P..
Librae
Groomb. 750 S.P. .
or Corona}
8 Ursae Minoris
17 Serpentis
Ursae Minoris
v) Ophiuchi
Cephei 51 S.P
fl 1 Lvrai ..
8 Ursa Minoris....
t Ursae Minoris....
/ Herculis
8 Ursae Minoris
TI Serpentis
Groomb. 750 S.P..
49 Librae
Cephei 51 S.P
i Libras
AZIMUTH ERROR.
149
Transit E. Paris continued.
Values of n.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
Date.
Names of Stars.
Positioo.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent.
9
-Adopted.
1892.
June 30
Groomb. 750 S.P..
8 Ophiuchi
W
w
8
+ 3-04
+ 6'7Q
12-09
O'o6
8
+ 0-3I2
8
1892.
July 6
Groomb. 750 S.P..
W
W
+ 4-83
+ 12*17
12-09
O-*6
S
+0-644
c Ursae Minoris
K Ophiuchi
E
F,
+ 9'3
+ 6-Qo
+ 7-3i
+ O'I7
+0-337
+ - 339
e Ursse Minoris
W
W
+ 1575
+ I2-IJ1
+ 7-31
+ 0-17
+0-451
+ 0-484
S Ursae Minoris ....
W
W
+ 13-02
4- 7-21
+ 16-88
4- O'C?
+ 0-355
S Ursae Minoris
96 Herculis
E
F
+ 20-37
+ I2'C2
+ 16-88
+ 0-18
+0-476
S Ursae Minoris
96 Herculis
W
F
+21-04.
+ I2-C2
+ 16-88
+ 0-38
+0-517
July i
Groomb. 750 S.P..
5 1 Libras
w
w
+ 4-16
+ 7-7 1
12-09
O'2O
+0-302
Groomb. 750 S.P..
K
+ VQ7
12'OQ
+ 0-328
July 7
Ursae Minoris.....
T/ Ophiuchi
W
W
+ 16-46
+ I3-22
+ 7-3i
0-28
+0-425
8 Ophiuchi
t Ursae Minoris
E
W
+ 7'9 2
+ 10-32
O'O6
+ 7-3I
+ O'32C
8 Ursae Minoris
rj Ophiuchi
W
W
+ 21-45
+ 13-26
+ 16-88
0-28
+0-479
+ 0-388
77 Ophiuchi
W
+ 7-8c
O-28
Cephei 5 1 S.P. .
F
+ 8-16
20-1:6
+ 0-260
8 Ursa; Miuoris
w
+ 13-80
+ 16-88
+ 0-14.6
+ 0-342
B Lyras .
E
+ 13-3:
+ 0-66
06 Herculis ...
w
4- 8-iq
+ o-*8
8 Ursae Minoris:....
E
+ 14-41
+ 16-88
+0-368
July 8
Groomb. 750 S.P..
8 Scorpii
E
F,
+ 8-85
+ 13-78
12-09
0-41
+0-423
72 Ophiuchi
W
+ 8-26
+ 0-17
24 Ursae Minoris...
E
+ 15-10
+ 19-02
+0-363
Groomb. 750 S.P. .
T Scorpii
W
W
+ 7-43
+ 14-11
12-09
0-53
+ 0-578
72 Ophiuchi
W
+ 8-26
+ 0-17
Cephei 51 S. P.. .
F
+ 0-68
20-56
_L 0*36 C
Ursae Minoris
W
+ I7-39
+ 7-3i
+0-428
+ Q.-A
K Ophiuchi
W
+ >4'35
+ 0-17
+ 0-17
Ursae Minoris
a Herculis
E
F,
+ 17-56
+ 14-10
+ 7-3i
+ 0-26
+ '479
July 2
Groomb. 750 S.P..
^31 Scorpii
E
F
+ 5-21
+ 8-ci
12-09
O'lC
+0-283
F
4-20*4.4.
+ 16-88
+0-178
+ 0-496
B.A C. 6069
F,
+ I4/OC
+ o-oi
Groomb. 750 S.P..
8 Ophiuchi
W
W
+ 5-84
+ 8-82
12-09
0-06
+0-248
W
-|-22'Q7
+ 16-88
+ 0-506
+0-285
t) Serpentis
W
-f 1 4/4-O
0-05
t Ursse Minoris
t) Ophiuchi
E
F
+ 11-42
+ Q-o6
+ 7-31
0-28
+0-311
W
+26-71
+ 19-02
+ 0-648
21 Sagittarii
w
+ 14-17
0-38
8 Ursae Minoris
v Ophiuchi
W
W
+ 13-86
+ 8-81
+ 16-88
O'I7
+0-297
Cephei 518?
w
+ VI \
2o-c6
+0-527
w
+ I4'4Q
o'i6
July 6
Groomb. 750 S.P..
51 Librae
E
F,
+ 7-96
+ I I'Ql
12-09
O*2O
+ 0-334
Cephei 51 S.P
E
E
+ 11-41
+ 13'33
20-56
0-33
(+0-091)
150 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1892.
Transit E. Paris continued.
Values of n.
Date.
Names of Stare.
Position.
Tubular
H^-
Observed
Transit.
Factore.
n
Apparent.
n
Adopted.
Date.
Names of Stars.
Position.
Tabular
R.A.
bserved
Transit.
Factors.
n
Apparent
n
Adopted.
1892.
July 9
Groomb. 750 S.P..
o-Scorpii
E
W
s
+13-89
+ 1?'??
12-09
O-4.7
8
+ 0-128
I
1892.
July 1 3
8 Ursse Minoris
E
E
s
+ 26-37
+ 16-88
+ n-$tn
+0-444
s
+0-430
Groomb. 750 S.P..
W
+ 7 '97
12-09
+ O-62C
Cephei 51 S.P
E
*V Z J
+ 0-71
20*56
liOphiuchi
W
+ ic-3o
o-?6
fli Lyrae
E
+ n .<<
T 443
c Ursse Minoris....
$ Ophiuchi
W
W
+ 18-32
+ 15-22
+ 7-3i
O'2O
+ 0-408
A Ursse Minoris ....
E
E
19 14
+4*73
+ 18-86
+ 55-62
+ 0-438
< Ursae Minoris
IT Herculis
E
E
+ 17-40
+ I5-1O
+ 7-31
+ O'7 C
+ O-32O
+ 0-407
A Ursae Minoris ....
W
W
+ 42-90
+ 55-62
+ rv T 8
+ 0-430
8 I " rsaa Minoris ....
ft Ophiuchi
E
E
+ 2i8o
-4- 1 c "oo
+ 16-88
+ O'o8
+ O-4OO
Ophiuchi
E
+ 22 27
-f 2O'^I
7 3 1
0-18
+ 0-257
8 Ursae Minoris
21 Sagittarii
W
W
+22-95
J- I C-QQ
+ 16-88
0-38
+ 0-456
/? Ophiuchi
E
+ 2 S 73
+ 2O'CI
+ O*O8
+0-314
A. Ursse Minoris
2 Aquilae
E
E
+42-58
-1- I C-2 7
+ 55-62
+0-493
T *i * 3
rj Serpentis
W
+ 2 5'35
+ 20-68
O'OC
+ 0-276
July 12
t Ursse Minoris....
K Ophiuchi....
E
E
+20-40
+ T7*O,L
+ 7-3i
+ 0-345
A Ursse Minoris....
W
+ 33' 6 9
W u^
+55-62
+ 0-238
/ vt
ft Sagittae
W
+ 2O-C2
+ O*^ I
8 Ursse Minoris....
/3 Ophiuchi
E
E
+26-24
+ 18-0*
+ 16-88
+ 0*08
+ 0-489
Groomb. 1 1 19 S.P.
W
+ 6-80
-54-85
+ 0-251
+ 0-221
a Aquilse
W
+ 2O'CC
+ rv i c
8 Ursae Minoris
a Lyrae
W
W
+ 26-6I
+ I8-C7
+ 16-88
+ 0-80
+ 0-500
Groomb. 1119 S.P.
E
+ 12-67
1 5
-54-85
+ 0-136
Cephei 51 S.P
W
+ 8 -70
+ 0-485
a 1 Capric.orni
E
+ 20-10
- 0-23
W
-4- 18-78
T 45'
75 Draconis
E
+ 2 I -09
+ 6-36
+ O'II
f Delphini .. ..
E
+ 20-28
+ O* 1 O
A. Ursse Minoris....
fl'Cyeni..
W
W
+ 47-06
4- I 8 AQ
+ 55-62
+ 0-519
Groomb. 3548
E
+ 21-66
'7
+ 16-77
+0-062
-]- 10 <).y
U 1J
Cygni . . .
E
+ 2O'6c
+ O"C7
A Ursae Minoris....
ft Aquilai
E
F
+ 51-68
+ l8'22
+ 55-62
+ 0-603
Groomb. 3548
W
+26-11
w >/
+ 16-77
+0-320
v Capri';orni
W
+ 20-65
O' ^ I
July 1 3
Groomb. 750 S.P...
40 Herculis...
E
W
+ 14-46
+ I 8-80
12*O9
+ 0-351
July 1 8
8 Ursae Minoris....
96 Herculis
W
W
+31-26
4-2 V4.2
+ 16-88
+ 0-78
+ 0-475
+ 0-475
K Opliiuchi.
W
+ '3'H
4_ 18-78
I2-09
+ 0-460
8 Ursas Minoris
i' Ophiuchi
W
W
+ 26-39
+ 18-70
o 17
+ 16-88
O" 1 7
+ 0-446
July 2 1
A Ursse Minoris. .k.
W
+ 5'-30
+ 55-67
+ 0-390
1
35
AZIMUTH ERROR.
Transit E. Paris continued.
Values of n.
151
Dte.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
H
Apparent
n
Adopted.
1892.
July 2 1
July 22
Groomb. 1119 S. P.
Q Capricorn!
W
w
W
w
E
E
E
E
W
W
E
E
E
E
W
W
l
+ 9"9i
+ 26-46
+ 28-97
+ 26-84
+ 29-58
+ 26-06
+ 23-86
+ 26-26
+ 3*-97
+ 27-92
+ 3'73
+ 27'39
+ 24-25
+ 27-01
+ '9'53
+ 2773
-54-82
0-27
+ 1677
+ 0-57
+ 1677
- 0-25
-10-99
O'OI
+ 16-88
+ o-53
+ 16-88
- 0-15
-20-55
- 0'37
-20-55
- 0'39
8
+ 0-303
+ 0-I3I
+ 0-207
+ O'220
+ 0-309
+ 0-255
+ 0-137
+ 0-409
8
O-250
1892.
July 2 2
A Ursae Minoris
?> Aquilaa
W
W
E
E
E
E
E
E
W
W
W
W
E
W
8
+ 47-5 6
+ 2773
+46-79
+ 27-62
+ 11-80
+ 27-62
+ 32-79
+ 27-62
+ 32-80
+27-72
+ 24-72
+ 2775
+ 23-17
+ Z7-75
+ 55^7
+ O'2I
+ SS-67
+ O'22
-54-82
+ O'22
+ 16-77
+ 0-08
+ 1677
- 0-31
-IO- 99
+ o-io
-10-99
+ O'lO
+0*357
+0-347
+ 0-287
+0-310
+ 0-297
+0-273
+0-413
+ 0-309
4
Groomb. 3548
A Ursae Minoris
16 Delphini ....
/ Cveni..,
Groomb. 3 548
Groomb. 1119 S.P.
p. Capricorn!
Bradley 1399 S.P..
71 Aouani
Groomb. 3548
8 Ursce Minoris
u, Herculis..
a Eouulei
Groomb. 3548
y Capricorni .. ..
8 Ursas Minoris
i AquilsB
Bradley 1 399 S.P..
Pp< r asi
f
Cephei 51 S.P
29 Sagittarii
Bradley 13998.?..
6 Pegasi
Cephei 5 i S.P.. ..
TT Sagittarii
Transit E was moved in Azimuth between June ix and ij.
Value of the Instrumental Constants I, m and n.
In the following tables the values of I (the level-error) converted into seconds of time )
the values of n and the deduced values of m are collected.
The values of m are derived from the adopted values of / (the level-error) and n by
the formula,
m = (I n sin A) sec. A where A is the latitude.
The adopted values for A are :
Latitude of Greenwich, 51 28' 38".
,, Montsouris, 48 49' 18".
152 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1892.
Adopted values of I, n and m far Transit D at Greenwich.
Date.
Sid. Time.
I n
m
Date.
Sid. Time.
I
n
m
1892.
June 7
8
h m h m
15 12 16 9
14 39 - 16 13
s
+ o-54*
+ o-345
a
+ 0-205
0^096
8
+ 0-62
+ 0-68
1892.
June 27
h' m h m
16 2 18 7
18 7-19 32
s
- o-'55
- 0-059
a
- 0-595
- 0-493
8
+ 0-50
+ 0-5I
9
14 40 - 15 12
15 12 16 z
16 2 18 16
+ 0-244
+ 0-244
+ 0-347
0-426
- 0-329
O-202
+ 0-93
+ 0-8o
-j- 0-81
29
30
17 4-19 15
15 45-18 7
18 719 6
- 0-079
0-236
- o-i35
- ' 2 45
0-238
- o-i34
+ 0-18
0-08
0-05
3
14 36- 15 12
15 12 l6 2
16 2 18 45
+ 0-329
4- 0-329
+ 0-378
- 0-045
+ 0-053
+ 0-127 .
+ 0-58
+ 0-46
+ 0'45
July i
15 45 - 16 56
16 5618 7
18 7-19 7
- 0-304
- 0-304
0-187
- 0-655
- 0-540
- 0-389
+ 0-33
+ 0-19
+ 0<I 9i
5
20
23
'5 45 - '5 4 8
14 50l6 2
16 2 18 36
15 20 18 54
O-222
O'262
0-2 1 8
0-165
- 04 524
0-488
- 0-342
- o-335
+ 0-30
+ 0-19
+ 0-08
+ 0-16
2
8
16 2 18 7
18 7-19 45
16 2418 7
18 7-19 3
0-260
0-260
0-227
0-227
0-617
- 0-478
0-461
0-361
+ 0-36
+ 0-18
+ O"22
+ O-Og
*4
15 12 16 2
16 2 18 32
0-180
0-095
- 0-175
0-084
0-07
0-05
n
16 5218 7
18 719 19
+ 0-236
-f 0-236
- 0-045
-f- 0-040
+ 0'43
+ 0-33
26
15 29 1 6 2
16 2 18 7
18 7 18 59
- 0-247
0-190
0-125
0-615
- 0-519
- 0-376
+ 0-38
+ 0-35
+ 0-27
15
20
16 36 17 41
16 56 17 10
+ 0-190
+ 0-255
- 0-175
0-036
+ 0-53
+ 0-45
2 7
15 12 l6 2
0-189
- 0-734
+ 0-62
22
19 31 20 27
+ 0-249
0-015
+ 0-42!
Adopted values of I, n and m for Transit E at Paris.
June 7
18 6 18 18
0-055 + 0-038 0-13
June 30
15 35 - ' 8 7
+ 0-084
+ 0-339
O-26
8
13 17 18 18
0-092 ' -f 0-276 ' 0-45
July i
15 15 - 18 49
+ 0-118
+ 0-342
O'2I
9
13 18 18 18
O-I2I
+ 0-421 ! 0-66
2
15 50-18 7
+ 0-067
+ 0-285
O'22
ii
13 18 18 38
0-191
+ 0-708 | i-io
6
'5 53-i8 7
-)- 0-209
+ 0-484
0-24
12
17 8 - 18 35
+ 0-107
+ 0-702
0-64
7
15 47-19 o
+ 0-203
+ 0-388
- 0-14
3
'3 17 - 19 3
+ -i55
+ 0-184
+ 0-03
8
15 48 - 19 30
+ 0-165
+ 0-496
O"22
5
16 019 2
+ 0-089
+ 0-006
+ 0-13
9
16 2 19 31
-f 0-196
+ 0-407
- 0-17
18
14 54- 15 '
o-ooo
0-064
+ 0-07
12
15 33 - 20 33
+ 0-177
+ 0-485
0-29
*3
15 12 1 8 49
+ 0-023
+ 0-172
o'i6
13
16 2 20 17
+ 0-118
+ 0-430
- 0-3I
*4
16 37 - 17 44
-f 0-052
+ 0-115
0-05
'5
1 6 25 21 40
+ 0-108
+ p-221
*
O-Og
26
15 10 18 10
+ 0-093
+ 0-23'
O-I2
18
17 53-18 6
+ 0-133
+ 0-475
- 0'34
*7
15 35 - 18 49
+ 0-099
+ 0-317
0-21
21
19 31 22 48
+ 0-153
+ 0-250
0-05
29
16 35 - 16 57
+ 0-123
+ 0-454
- 0-33
22
17 8 22 13
+ 0-159
+ 0-309
o-i i
CATALOGUE OF STARS.
153
XL CATALOGUE OF STARS.
The following stars were selected for observation during the period of the
longitude work. The first column contains the name and the fourth the Tabular Mean
R.A. for 1892-0 given in the Connaissance des Temps (C.T.), M. Loswy's Catalogue (L),
or the Berliner Jahrbuch (B.J.), as shown in column 2. Column 6 contains corrections
to these Right Ascensions found by comparison of the Ephemeris, with the Catalogue
given in the last column. These corrections have been applied to the Apparent places
of the ephemerides in calculating the final clock error.
Name of Star.
Ephemeris.
Magnitude.
Tabular Right
Ascension, 1 892-0.
Approximate
Declination.
Correction
to
Ephemeris.
Greenwich Catalogue.
L
6-0
h m s
I 1, 4.O IO'Q3
/
1 1. C3
8
O'OI
Ten year, 1880.
C.T.
2'Q
I 3. 4.Q. 32'C4
+ 18. 56
O'O2
Five year, 1 890.
B A.C. 4666
L.
6-5
I 5. CA. 22"Q6
7. 4.O
4- 0-14
Ten year, 1 890.
T Virginia
C.T.
4-*4-
I 3. C6. 8'QC
+ 2. 4
O'OO
Five year, 1 890.
04, Vir"inis
L.
6-8
H. O. 34/C3
8. 23
+ O'O3
Five year, 1 890.
a Draconis
C.T.
v6
HI. 27*86
4- 64. C4
-4- o'oc
Five year, 1 890.
B A.C 4700
L.
C'2
H, A c6*4.i
11.48
4- CTI2
Ten year, 1 890.
CT.
O'O
HIO 4.4.'O4.
4- IQ. 4.C
4- O'oc
Five year, 1890.
C.T.
4-6
H. 13. I C'Q4-
12. C2
0-03
Ten year, 1880.
L.
6-3
H. 17. 36*84.
1 1. 13
4- 0-06
Ten year, 1880.
1 06 Virginis
L.
C-Q
H. 22. CQ'SC
- 6.25
4- 0-04
Ten year, 1880.
p Bootis
C.T.
3-6
H. 27 IO'C2
4- 30. c i
O'OI
Five year, 1 890.
Bootis
C.T.
3-8
H. tC. CQ'4-2
+ 14. 12
4- 0-02
Ten year, 1880.
L.
VQ
H* 77. 22'O4.
c. q
O'O2
Ten year, 1880.
L
6-2
H. 4.O O'^Q
I C. O
4- o'oi;
Ten year 1890.
e 2 Bootis
C.T.
3-0
14. 40. 1 6* 1 7
+ 2 7- 3 2
4- o"3
Five year, 1890.
a i Librae
C.T.
C"3
H. 4.4.. 4.2'6o
I C. I J
4- 0-07
Ten year, 1880.
a 2 Librae
C.T.
TO
H. 4.4.. C4-*I4.
1C. ?6
4- 0-03
Five year, i 890.
(3 Ursag Minoris
C.T.
L.
2'I
Var
14. 51. 1-28
H. cc i i'o6
+ 74- 36
- 8. c
+ 0-05
4- o'QQ
Five year, 1 890.
Ten year, 1890.
20 Librae
C.T.
3'2
14 C7. 44'87
24. ci
4- o-oi
Ten year, 1880.
/3 Bootis
C.T.
3-6
14.. C7. C2'6c
4- 40. 40
4- o'oi
Five year, 1890.
i/' Bootis ...
CT.
4't
HCQ 4.Q'o6
4- 27. 22
4- 0-02
Five year, 1890.
v 2 Libr3? .
L
6-8
1C O 4.7' I C
16. 4
4- o-oc
Ten year, 1880.
B.A.C. 4984
L.
6-8
1C. 3. 4 VI4.
23. 34
4- O'OQ
Ten year, 1890.
8 Bootis
C.T.
v 1 ;
i C. 1 1. 8-qc
+ 33- 43
4- O'oi
Ten year, 1880.
C.T.
C'O
1C. I 8. 4.4." C 4.
4- 30. 41
4- o'oc
Ten year, 1880.
y 2 Urste Minoris ....
L Draconis
C.T.
C.T.
3-2
tM
15.20. 54-71
I C. 22 ^I'S?
+ 72-13
4- ?Q. 21
0-40
o-io
Ten year, 1880.
Ten year, 1880.
3 Librre . . .
L.
5-8
1C 24. 34.'73
1 6. 14
O'O4
Ten year, 1880.
L
4.'Q
15 28 16-41
Q. 42
4- o'oc
Ten year, 1 890.
L
4/O
1C 20 2Q*OI
y *
14. 2O
4- o-oc
Ten year, 1880.
a Coronse
C.T.
2*4
ic. 1.0. 6-88
4- 27. 5
O'OO
Five year, 1890.
L.
C'2
1C. 33. C V7O
23. 28
4- O'O7
Ten year, 1880.
C.T.
C'O
1C 3 C. 4.3*?8
IQ. 2O
O'O2
Ten year, 1890.
L.
C'C
i c. 37. sQ'6:
I C. 2O
4- 0-08
Ten year, 1880.
a Serpentis
C.T
2*7
ic. 38. s6-83
+ 6.46
4- 0-04
Five year, 1890.
J3 Serpentis
B.J.
3-8
i c. 41. 12*14
+ 15-46
4- '5
Ten year, 1880.
L.
3*7
I C. 4.C 2C'87
4- 4. 48
4- 0-03
Five year, 1890.
A Librse
C.T.
C'O
If. 47. ^'84
IQ. CI
o'oc
Ten year, 1880.
GREENWICH OBSERVATIONS, 1899.
154 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1892.
Name of Star.
Ephemeris.
Magnitude.
Tabular Right
Ascension, iSgz'o.
Approximate
Declination.
Correction
to
Ephemeris.
Greenwich Catalogue.
6 Libra
L.
C.T.
L"
L.
C.T.
C.T.
L.
C.T.
C.T.
C.T.
C.T.
B.J.
L.
C.T.
L.
L.
L.
C.T.
C.T.
L.
C.T.
C.T.
C.T.
B.J.
L.
C.T.
L.
L.
L.
L.
L.
C.T.
L.
C.T.
C.T.
C.T.
C.T.
C.T.
L.
C.T.
C.T.
C.T.
L.
C.T.
L.
L.
L.
L.
C.T.
C.T.
L.
4'3
4'5
6-8
4-8
3-1
'5
5-6
4 -I
Z-O
4'*
2-8
5-0
3'4
47
3'
4-6
5'5
5-0
2-8
PI
4'4
4-0
2-8
2-9
2-8
5-2
$
6-7
6-4
7'3
7'3
3 '4
6-5
4-0
4'5
z-6
3'3
5-6
6-8
Var.
3-0
3'4
4'5
I' 4
6-5
4' 5
4'4
4'9
3 -o
2-2
37
47
4'4
5-0
2-9
Var.
h ni a
15.47.40-47
15-47- $5-9
15. 50. 10-98
15.52. 8-38
15.52. 18-95
15.53.56-80
15.54.15-97
15. 58. 25-66
15.59. 9'4
16. 5.43-11
16. 8.41-07
16. 10. 37-89
16. 12. 36-37
16.14. 8-15
16. 14. 37-41
16.17.46-93
16. 19. 6-42
16. 20. 45-78
l6. 22. 32-44
l6. 22. 47-07
16.24.57-35
16. 25. 28-04
16.25.34-53
16.29. 9'53
16. 31. 12-67
16.35.19-51
16. 37. 12-90
1 6. 40. 14-64
16.43. 9-97
16.47. 9-80
16. 48. 19-16
16.50.43-14
16.52. 33-27
16.55.32-09
16.56. 9-34
16. 57. 3-06
17. 4. 10-98
17. 8.28-47
17. 8.42-36
17- 9- 34^5
17- 9-43-3I
17. 10.35-51
17. 1 1. 17-06
17. 14. 31-80
17. 1 6. 37-06
17. 18.14-39
17.19.46-38
17.21. 9-26
17.24.49-45
17.27. 59-42
17.29.55-18
17. 31. 24-01
17.31.58-43
17. 35.20-59
17-36.57-41
17.38. 8-n
17.40.45-62
/
16. 25
+ 78. 8
- 14- 5
- 13-58
- 25-48
22. 19
16. 13
- ii. 5
- I9-3I
19. ii
- 3-25
+ 34- 8
4. 26
- 23-55
25. 20
- J 9-47
23. 12
18. 13
+ 61.46
26. 12
16.23
+ 2. 13
+ 21.44
- 27.59
10.21
- I7.32
+ 3I-48
25. 2O
- 2 4 . 27
+ '5- 9
23. 20
19.22
+ 9-33
- 18.44
+ 3i- 5
+ 82.13
- '5-35
+ 65.51
26. 27
26.23
+ i4-3i
+ 24-58
+ 36.56
21.
+ 32. 36
21.21
- 24. 5
+ 4- H
- 23.53
+ 52.23
+ 12.38
15. 20
- 8. 3
- 12.49
21. 38
+ 4-37
- 27.47
s
+ 0-06
0-62
0-04
+ 0-08
O-O2
O'Ol
o-oo
O'OI
0-05
O'OI
+ 0-14
0-08
+ 0-03
+ 0-03
+ O-O2
+ 0-07
+ 0-03
- 0-72
o-oi
0-09
O'l I
+ 0-08
o-oi
O-O2
o-oo
0-04
0-06
O'OI
o-oi
+ O'OI
+ 0-05
+ 0-05
o-oo
+ 0-05
- 0-51
0-02
0-02
o-oi
+ 0-14
+ O'O2
+ 0-18
+ 0-04
+ 0-04
+ 0-04
+ O-O2
O'O2
+ 0-04
+ O-II
+ 0-08
+ 0-04
+ 0-08
+ 0'12
+ 0-07
+ 0'08
+ 0-15
Ten year, 1880.
Five year, 1890.
Ten year, 1890.
Ten year, 1880.
Ten year, 1 890.
Ten year, 1880.
Ten year, 1880.
Ten year, 1880.
Ten year, 1880.
Ten year, 1880.
Five year, 1890.
Ten year, 1890.
Ten year, 1880.
Ten year, 1890.
Ten year, 1880.
Ten year, 1880.
Ten year, 1890.
Ten year, 1890.
Five year, 1 890.
Ten year, 1880.
Ten year, 1880.
Five year, 1890.
Ten year, 1880.
Ten year, 1880.
Five year, 1890.
Ten year, 1880.
Five year, 1 890.
Ten year, 1890.
Ten year, 1890.
Ten year, 1 890.
Ten year, 1890.
Ten year, 1890.
Five year, 1890.
Ten year, 1880.
Five year, 1890.
Five year, 1890.
Five year, 1890.
Ten year, 1880.
Ten year, 1880.
Ten year, 1 890.
Five year, 1890.
Ten year, 1890.
Ten year, 1880.
Ten year, 1880.
Ten year, 1890.
Ten year, 1890.
Ten year, 1880.
Five year, 1890.
Ten year, 1890.
Five year, 1890.
Five year, 1 890.
Ten year, 1 890.
Ten year, 1890.
Ten year, 1890.
Ten year, 1890.
Five year, 1880.
Ten year, 1880.
Ursse Minoris ...
W.B. XV. 910
48 Librae
IT Scorpii
8 Scorpii
49 Librae
5 1 Librae
/8 1 Scorpii
v 2 Scorpii
8 Ophiuchi
0-1 Coronse
c Ophiuchi
19 Scorpii
<r Scorpii
p Ophiuchi
a Antares
<i Ophiuchi
A. Ophiuchi
T Scorpii
Ophiuchi.
B.A.C. ;i;7Q...
Herculis
2 5 Scorpii
1 8 Ophiuchi .
49 Herculis
22 Ophiuchi
B.A.C. 5700
K Ophiuchi
29 Ophiuchi
e Herculis
Ursse Minoris
T\ Ophiuchi
t, Draconis
A 1 Ophiuchi
30 Scorpii
8 Herculis
TT Herculis
Ophiuchi
w Herculis
B.A.C. 5866
l> Ophiuchi
<T Ophiuchi
c 2 Ophiuchi
/3 Draconis
Serpentis
o Serpentis
L.
L.
C.T.
L.
5 8 Ophiuchi
y8 Ophiuchi
3 Sagittarii
CATALOGUE OF STARS.
155
Name of Star.
Ephemeris.
Magnitude
Tabular Right
Ascension, i892 p o.
Approximate
Declination.
Correction
to
Ephemeris
Greenwich Catalogue.
/A Hcrcttlis
C.T.
3'C
h m B
17. 42. 13-78
/
+ 27. 4.7
4- O-O7
Five year, 1 800
B.A.C. 6030
6-0
17. 44. 6-31;
4- IQ. 17
Ten year, 1890.
B.A.C. 6034
L.
6-8
17. 4C. 2C-4I
IQ. 3O
O-OI
Ten year, 1 890.
B.A.C. 6049
6-c
17. 47. 3'CO
IO. C2
Ten year, 1890.
B.A.C. 6060 ....
L.
6-c
17. 40. 33'C C
l8.47
+ 0-28
Ten year, 1880.
B.A.C. 6069
c-8
17. CO. 48'2I
+ O. 41
Ten year, 1890.
v Ophiuchi
C.T.
VC
17. C3. 4-83
Q. 4.6
O'O3
Ten year, 1880
y Draconis
C.T
2*4.
17. C4- C/Q3.
+ ci. ^o
o-io
Five year, 1890
67 Ophiuchi
L
4.'O
17. CC. 1 4' I 3
+ 2 c6
O"O2
Ten year, 1 890.
96 Herculis
L
5*1
17. C7- 4?'Q1
+ 20. 50
+ O'O2
Ten year, 1880.
p 1 Ophiuchi
C.T
4' I
17 CO. CQ'62
+ 2. 32
4- 0-23
Ten year, 1890.
72 Ophiuchi ..
B.J.
V8
18. 2. M'74
4- Q. 33
O'OI
Five year, 1890
77 Serpentis
C.T.
V4-
18. I c. 43-27
^ y ss
2. c6
0-04
Five year, 1890.
2 1 Sagittarii
L.
4'Q
18. 18. 55-01
20. 36
4- o-oi
Ten year, 1880.
i Aquilse
L.
4"O
l8. 2Q. IQ'7 I
8 19
O'OO
Ten year, 1880.
a Lyrse
CT.
O'2
18. ??. 16-84
+ 38 41
4- o-oc
Five year, 1 890.
2 Aquilse
L.
4-8
18. 36. 21-72
Q. Q
0-14
Five year, 1 890.
<f> Sagittarii
L
VI
l8. ^8 C4-'42
- 27. 6
4- o"o4
Ten year, 1890.
29 Sagittarii ..
L.
c-r
l8. 4^. I C'C4
2O. 27
O'O4
Ten year, 1880
fi 1 Lyra...
C.T.
Var.
18. 46. C'44
4- -?^. 14
o-oo
Five year, 1890.
6 l Serpentis
L.
4*O
18 co. CO-Q'?
+ 4. 4
4- 0-02
Ten year, 1880.
L
3*c
1 8. 51. 17-07
21 1C
O'OI
Ten year 1880.
e Aquilse
L.
4' I
18. C4. 43-18
. )
+ 14- ^l
+ O-02
Ten year, 1880.
o Sagittarii
L.
VQ
18. 5-8 12-63
21. C4
+ O'O2
Ten year, 1880.
Aquilse
C.T.
VI
IQ. O. 26'C7
+ 13.42
4- 0-16
Five year, 1890.
IT Sagittarii...
C.T.
VI
IQ 3. 2O-37
21 12
4- 0-04
Ten year, 1880.
20 Aquilfe
5*3
IQ. 6.4Q-IQ
- 8. 7
Ten year, 1 890.
d Sagittarii
L.
4*0
19. I I. 18-90
IQ Q
o-oo
Ten year, 1880.
(o Aquilae
C.T.
C'l
IQ. 12. 44'74
+ II. 24
4- o'oc
Five year, 1 890.
v Sagittarii
b Aquilse
L.
C.T.
47
K'9
19.15.32-43
IQ IQ. 4Q'32
16. 10
+ 1 1 4*^
+ 0-08
O'I2
Ten year, 1890.
Ten year, 1 890.
8 Aquilfe
C.T.
3'C
IQ. 2O. ?'OQ
-I- 2. C4
4- 0-06
Five year, 1890.
A.' 7
19 24 I2'66
+ 24. 27
Ten year, 1 890.
B l Cyeni ..
C.T.
VI
19. 26. 21-87
+ 27. 4,4
4- o-oq
Ten year, 1880.
K Aquilse
CT.
4"Q
IQ 31 4'86
7. l6
4- o-oi
Ten year, 1880.
/? Sagittarii
L.
4"4
IQ. 36. I 1-83
+ 17. 14
0-04
Ten year, 1880.
C.T.
2-8
IQ 4.1. 7*4.4.
-J- IO. 21
4- O'O3
Five year, 1890.
a Aquilse
C.T.
I'O
IQ.4.C ^O*78
+ 8. n
4- o-oi
Five year, 1890.
/3 Aquilse
C.T.
4'O
IQ. CO. O"4.^
+ 6. 8
+ o-oi
Five year, 1800.
rj Aquilee
L.
Var.
IQ. 4,6. C8*l8
+ O. 44
4- o-oi
Five year, 1800.
& Aquilsc
C.T.
3'4
20 c 4.^*87
- i. 8
4- 0-03
Five year, 1 890.
CT
4'C
20 1 1 39*66
12. CO
+ O'OI
Ten year, 1890.
a 2 Capricorni
C.T.
3-8
20. 12. v6y
12. C3
4- 0-07
Ten year, 1890.
<r Capricorni
L.
c-6
20. i ^. o*6c
IQ. 27
O-O2
Ten year, 1880.
jS^ Capricorni
C.T.
VA.
2O 14. C6'C^
I c. 7
4- 0-04
Five year, 1890.
L.
C*4.
2O. 17 4.Q"6o
4- C o
O"O2
Ten year, 1 890.
p Capricorni
C.T.
5*0
2O 22 4.1'Q^
18. 10
4- 0-08
Five year, 1890.
L.
C*2
2O. 24. O*2C
3, I C
4- o-oc
Ten year, 1890.
e Delphini .
L
4.*!
20. 28 3*i i
4- 10. c6
4- o-oc
Five year, 1 890.
j8 Delphini
L.
V7
20. 32. 28*98
+ 14- I 3
4- o"o6
Ten year, 1 890.
7 5 Draconis
c-6
2O 34.. CQ'QI
4- 81. 3
Ten year, 1890.
a Cveni
C.T.
I *C
2O. ^7 4.4.'S6
4- 4.4. C4.
4- O-OQ
Five yenr, 1890.
t Cyeni ..
C.T.
2'7
2O. 41. 10*4.1
+ 33- 14
4- '7
Ten year, 1880.
L
6-2
2O. 4.4. 28'Q I
4-12. Q
4- O'O2
Ten year, 1880.
C.T
4-8
20. 4.6 4.0*67
Q. 23
4- O'O2
Five year, 1890.
L.
6-0
20. 4.8 4.1 '63
18. 20
O'O3
Ten year, 1880.
1 6 Delphini
L.
C-4
2O. CO. 2Q*32
4-12. Q
4- 0*01
Ten year, 1880.
156 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1892.
Name of Star.
Ephemeris.
Magnitude.
Tabular Right
Ascension, i 891-0.
Approximate
Declination.
Correction
to
Ephemeris.
Greenwich Catalogue.
L
6-2
h m a
2O. 53. 27'86
/
19. 27
s
O'OI
Ten year, 1880.
L
C'2
20. 58. 1 5-44.
20. 17
+ o-oi
Ten year, 1800.
6 Capricorni
L.
4/3
20. CO. 52-48
17.40
+ 0-07
Five year, 1890.
L.
6-2
21. 3. 22-44
20. 59
+ O'O6
Ten year, 1800.
L
4.- 8
21. C. 5-31
+ 9- 4 2
+ O'O2
Ten year, 1800.
t Cveni ..
C.T.
3-5
21. 8.2O-27
+ 20. 47
+ O'lO
Five year, 1890.
a Kquulei
L.
4/1
21. IO. 25'43
+ 4- 48
+ O'4
Five year, 1800.
C.T.
4/3
21. 13. IO-32
+ 38. 57
+ O'lO
Ten year, 1880.
C.T.
3'8
21. 34.. 6-42
17. q
+ 0-03
Ten year, 1880.
e Peeasi . .
C.T.
2*4-
21. 38. C2-88
+ Q. 23
0-05
Five year, 1890.
c' Capricorni
C'2
21. 3Q. I4/8O
9-35
Ten year, 1800.
C.T.
*o
21.4.1. 4/68
16. 37
+ '7
Five year, 1 890.
L
C'2
2 I. 4.7. 24-40
14. 4
+ 0-07
Ten year, 1890.
CT
V2
22 O. 14*12
o. 51
+ 0-04
Five year, 1 890.
L.
4/O
22. I. 58-8Q
+ 24. 40
+ 0-06
Five year, i8qo"
L.
3-8
22. 4.. 4.C"O3
+ 5- 4-O
o-oo
Ten year, 1880.
rj Aquarii
C.T.
4/2
22. 2Q. 48-2Q
o. 40
+ 'O4
Five year, 1890.
t Peeasi. .
CT.
3'6
SP * "
22. 36. 4/3Q
+ 10. 1 6
+ O'lO
Five year, 1800.
C.T.
VI
22. 37. 56'2Q
+ 2Q- 39
+ 0-06
Ten year, 1880.
T 2 Aquarii
L.
4/1
22. 4.3. 52-33
14. 10
+ O'lO
Ten year, 1890.
74 Aquarii
L.
5-8
22. 47. 47-42
12. I I
+ 0-08
Ten year, 1890.
8 Aquarii
C.T
V4.
22. 48. 55'OI
1 6. 24
+ 0-06
Ten year, 1 890.
The Stars W.B. XV. 910, p Ophiuchi, B.A.C. 6030, B.A.C. 6049, B.A.C. 6069, 20 Aquilae, 75 Draeonis and Cj Capricorni
are not in the ephemerides. Their apparent places have been computed from the Catalogue given in the last column.
XII. CLOCK ERROR.
The Clock Error was determined from observation of the stars given in the preced-
ino- section. The following table contains the times of transit of these stars and of the
circumpolar stars used to determine the Azimuth Error. Column 1 contains the star's
name ; column 2, the position of the micrometer head, whether East or West. Column
3 gives the number of wires over which the transit was observed, or, in the case of
circumpolar stars, the number of bisections made, as explained on p. 25. Column 4
gives the reading at which the R.A. micrometer was set during the evening for observa-
tions of clock stars, and the mean of the micrometer-readings at which bisections were
made for the polar stars. Column 5 gives, in all cases, the time of transit over the
middle wire, set at the reading of the R.A. micrometer adopted for the day. Column
6 gives the transit corrected for Collimation, Level, and Azimuth Error. Column 7
contains the Tabular Apparent R.A. of the stars taken from the ephemerides before
mentioned, corrected by application of the corrections given on pp. 153-156. Column
8 shows the difference of columns 6 and 7, which is the Clock Error indicated by the
individual stars. Column 9 is the Clock Error at 18 h local Sidereal time on each day,
obtained from each star. The corresponding Clock Errors deduced from polar stars are
given in column 8 as a check on the accuracy of the reduction, but are not given in
column 9, as they are, of course, not used in determining final Clock Error.
STAR-TRANSITS OBSERVED AT GREENWICH
AND
RESULTING CLOCK ERRORS.
Star's Name.
< a
P
Observed
Transit.
S3!
H -
!,*
Star's Name.
<
Observed
Transit.
Sill
o a?S
Groombridge 2283 .
Groombridge 2283 .
y- Ursse Minoris....
i Draeonis
f 3 Libras
37 Libra
5 Librae
a Libra
/3 Urs;e Minoris
8 Libra
Buiitis
Groombridge 2283 ....
Groombridge 2283 . . .
i) Coronje
y- Ursie Minoris
S- Bootis
a 1 Libra
a' Librie
6 Ursae Miuoris
8 Libra;
ty Bob'tis
i/ 2 Libra;
KA.C. 4984
Groombridge 2283
Groombridge 2283
T; Corouie
i Di'aconis
f 3 Libra
37 Librie
o Coronas
a Serpeutis
Groombridge 750 S.P.,
H Virginis
5 Librae
o 1 Librae
a 2 Librae
P Urspe Minoris
8 Librae
|3 Bodtis
i(/ Bodtis
Groombridge 2283
Groombridge 2283
7 2 Ursae Minoris ...
i Draeonis
* Libra
W 10
W 5
W 6
W 9
1892 June 7. Observer H T. Transit D.
10-172 15. ii. 44'gi
15-010 15. ii. 46-88
1 1 -680 15. 20. 9-07
15. 22. 45-26
15. 24. 47-43
15. 28. 29-14
1 1 -680 14. 39. 1277
14. 44. 6-46
14. 50. 17-67
14. 54. 24-46
14.57. 5-55
14-641 15. II. 52-84
12-047 15.11.51-79
1 1 -680 15. 17. 57-20
15. 20. 9-66
1 1 -680 14. 40. 28-33
14. 44. 54-42
14. 44. 5-83
14. 51. l8'22
14. 55. 23-84
14- 59- i"37
15- 0.59-13
15- 3.45-I
15-452 15. n. 58 67
10-331 15.11.58-36
11-680 15. 18. 56-92
15. 22. 45-60
15. 24. 46-68
15. 28. 28-38
15. 30. 19-28
15.38. 8-95
lo-ioo 16. i. 40-48
50-14
52-29
10-29
46-20
47 '97
29-71
3874
3874
59-00
3478
36-50
18-24
48-60
46-45
4871
48-58
48-53
8 Scorpii
51 Libras
Groombridge 750 S.P
Groombridge 7508.?
8 Ophiuchi
o- 1 Coronae
1 1 -680
9-136
12-249
11-680
!4- 36- 33-97
14. 39. 12-31
14. 43- 54'63
14. 44. 6-17
14. 50. 1673
'4- 55- 23'97
14. 57. 5-01
14.59. 1-20
IS- H-47'34
15. n. 48-00
15. 20. 8-88
15.21.44-90
15.26. 1-33
1892 June 8. Observer H T. Transit D.
1 3 '45
7-I4
17-91
25-12
6'12
50-80
49-93
57-80
lO'OI
2 'O2
55-82
6-46
1376
54-80
3^36
48-68
48-55
48-64
48-68
48-56
48-79
48-96
48-60
4871
4 8 : 67
4871
48-81
y Librae
a Coronae
42 Libra ,
o Serpentis
Groombridge 750 S.P
Groombridge 750 S.P
8 Ophiuchi
a 1 Coronffi
a Scorpii
1892 June 9. Observer H T. Transit D.
29-01
55-45
6-86
I7-54
24-81
2 'O6
0-16
46-20
48-85
50-96
57-52
45-82
47-57
29-23
19-90
9-70
45 '47
18-03
44-41
55-82
6-41
1373
50-97
48-90
35-00
46-59
34-75
36-50
18-25
8-85
5871
33T3
49-02
48-96
48-96
48-87
48-92
48-91
48-74
48-80
49-I3
47-02
49-07
48-93
49-02
49-01
47-66
49-04
48-98
48-98
48-94
48-93
48-76
48-82
49-08
48-94
49-3
48-96
49-02
Groombridge 750 S.P
8 Ophiuchi
<r l Coronse
19 Scorpii
i(( Ophiuchi . .-.
X Ophinchi
T) Draconis
(f> Ophiuchi
B.A.C. 6060
v Ophiuchi
7 Draconis
67 Ophiuchi ....
p l Ophiuchi
8 Ursae Minoris.
8 Ursae Minoris.
T] Serpentis
34-54
12-89
55-21
6-75
17-14
24-55
5'54
'75
46-63
49-38
9'44
45-4I
'75
23-62
2-06
44-40
55-8i
6'2I
13-72
5476
50-96
36-52
36-52
58-47
34-69
50-91
49-08
49-I7
49-19
49-06
49-07
49-17
49-22
49-21
49-89
47-14
49-03
49-28
49-16
49-09
49-18
49-20
49-07
49-18
49-23
49-22
49-16
49 Librae
51 Libra
(jroombridge 750 S.P
Groombridge 750 S.P
i/ 2 Scorpii
8 Ophiuchi
o- 1 Coronae
8 Ursae Minoris
8 Ursae Minoris..
2 Aquilae
29 Sagittarii
/3 1 Lyras
11-680
12-990
I3-450
11-680
11-680
12-024
15-009
11-680
8-610
11-680
1892 June 13. Observer H T. Transit D.
IS- 53- 9-67
IS- 57- 38-50
16. i. 46-98
16.
16.
1 6.
1.46-12
7- 53-90
9. 50-83
15. 28.
15. 29.
15- 33-
I5-38.
16. 1.
16. i.
16. 7-
16. 9.
16. 13.
41-36
19-39
6-18
9-3i
43-12
42-30
53-69
50-83
50-25
1 1 -362
16. i. 38-95
16. 8.53-13
16. 10. 50-67
16. 14. 20-37
16. 17. 59-09
1 6. 20. 58-00
16.22.4573
16. 24. 9-60
16. 25. 46-74
17. 49. 46-30
| 17. 53. 17-21
17. 54. 18-74
17. 55. 26-53
18. O. 12-22
18. 6. 40-64
8-241 i 18. 6. 40-39
11-680 18. 15. 55-61
11-680
8-860
11-525
11-680
8-836
11-991
11-680
15- S3- 28-33
I5.S7.38-I3
16. 1.4579
i. 45-58
4.55-40
9- 50-45
6.35-80
18. 6.35-58
18. 35. 34-10
1 8. 42. 28-28
18.45. '773
10-19
39-06
45-22
44-46
54'49
51-57
42-04
20-00
6-88
9-96
45-06
44-34
54-3S
SMI
50-95
42-3I
53^4
5I-33
21-26
58-87
46-14
10-46
47-46
47''7
18-04
19-29
27-32
13-01
37-88
37-51
56-42
28-75
38-56
45-82
44-60
55-8o
5375
50-98
38-11
3777
34-5I
28-66
18-24
58-72
27-53
32-80
32-80
42-93
40-15
30-88
8-85
55-66
58-71
32-96
32-96
42-94
40-15
39-49
33-13
42-95
40-15
IO"22
4777
34-97
59-25
36-58
36-24
6-80
8-27
15-96
1-78
27-20
27-20
45-iS
17-87
27-56
33-8o
45-05
40-15
27-07
27-07
23-60
17-65
17-40
48-47
48-58
48-84
48-85
48-78
4875
47-90
48-62
48-59
4874
48-54
50-82
49-01
48-82
48-96
48-99
48-90
48-83
48-79
49-12
49-07
48-76
48-98
48-64
4877
49-32
49-69
49-12
49-00
49-20
49-25
49-22
49-I7
48-96
49-3
49-09
48-99
49-16
48-55
48-49
48-46
48-60
48-86
48-87
48-80
48-61
48-76
48-5S
49-02
48-83
48-97
49-00
48-91
48-80
49-I3
49-08
48-76
48-98
48-64
4S-77
48-73
49-12
49-00
49-22
49-I7
49-09
48-99
49-16
158
TELEGRAPHIC DETERMINATION OP LONGITUDE, PARIS-GREENWICH, MADE IN 1892.
Star's Name.
Position.
No. of Wires.
B.A.
Micrometer.
Observed
Transit.
Corrected
Transit.
Tabular
Apparent
B.A.
Clock
Apparently
Slow.
>W3
iPJ
SS^-H
0.0 ,33
<&
Star's Name.
Position. 1
No. of Wires. 1
E.A.
Micrometer.
Observed
Transit.
Corrected
Transit.
ll-J
!*
H <!
>*
Ill
O fWD
S
<!
Clock
Apparently
Slow at i8 h
Sidereal.
( Ursae Minoris
E
E
E
E
E
W
W
W
W
W
E
E
E
E
W
W
W
W
W
W
W
W
E
E
E
E
E
E
E
E
E
E
E
W
E
E
E
E
E
E
E
W
W
W
W
W
W
W
W
W
W
W
W
E
E
E
E
E
E
E
7
6
1
IO
7
7
9
9
IO
IO
9
9
9
5
5
7
9
8
9
8
IO
IO
7
9
9
7
4
6
8
4
9
9
IO
9
6
9
9
4
9
IO
IO
9
9
8
9
9
9
9
9
9
9
10
IO
9
1
9
IO
9
1 1 '680
II-700
11
M
I2-483
II-7OO
II
11-095
8'I56
II7OO
11
19
II700
11
))
12-189
7-091
11700
it
11
1 1
M
IJ
})
M
11-073
II70O
it
it
> >
1)
13*579
H'SSI
II7OO
tt
Fl
it
II700
11
11
1}
9-591
9^97
11-700
ii
i j
12-403
11-700
h m s
15. 47. 14-81
14. 50. ig'IO
14-57- 5'92
14.59. 1-90
15. 11.59-15
15. 29. 19-54
IS-38- 939
15.44. 38-55
15- 57- 38-41
16. i. 42-93
16. i. 39-05
16. 16. 59-60
16. 19. 58-54
16. 47. 2271
15. 20. IO'2I
15.22.45-52
15. 27. 28-68
15. 29. 19-35
15. 38. 9-14
IS. 44. 38-23
15-53- 9^7
16. 1.4275
'6- i- 3973
16. 36. 25-72
16. 46. 22-39
16.51.45-91
16. 55. 22-27
1 6. 56. 25-44
17. 8. 43-54
17. 9.48-42
17. to. 30-13
17. I3-44-58
17. 15-50-14
15. ii.47 - 38
15. 29. 19-59
I5-34.55-85
15- 38. 9-47
15. 44. 38-55
15. 47- 12-54
15. 51. 21-06
16. i. 44-64
16. i. 44-71
16. 7. 53-61
16. 24. 40-56
1 6. 34. 32-40
16. 36. 25-78
15. 29. 50-38
15. 38. 40-05
15-45- 9-I4
I5-47-45-I5
15- 53- 39-85
15.58. 8-91
16. 2. 13-56
16. 2. 7-47
16. 36. 56-83
1 6. 46. 53-67
16. 48. 2-89
1 6. 50. 26-68
16- 56. 57-37
17. 8. 26-01
1892
12-58
189
17-21
S'57
174
45-43
19-55
9-58
3876
38-76
43-01
40-56
59-70
58-64
22-61
185
9'5o
45-23
28-96
19-41
9-32
38-42
9H3
46-26
44-96
25-57
22-37
45-93
22*13
22-46
4273
48-33
29-94
44-78
49-99
189
42-76
19-34
5575
9-3
38-39
11-23
20-94
477i
44-98
53-63
40-57
32-45
2575
189
50-52
40-42
9-53
42-88
40-54
9-47
19-77
16-03
56-76
53-79
3-37
27-12
53-31
26-53
Jun
s
1-64
2 Ju
578
54-70
50-91
33-98
8-81
5872
2775
27-58
34-S7
34-87
49-02
47-83
11-79
)2 Ji
58-38
34-49
18-26
8-80
58-71
2775
58-78
35-54
35-54
14-97
1 1 -80
35'33
ii-53
11-31
31-90
37 79
I9-33
34-10
39-27
2 Ju
32-07
8-79
45-25
58-71
27-74
1-09
10-26
3578
3578
43-00
29-90
21-62
14-96
2 Ju
8-78
5870
2774
0-95
58-78
27-59
36-22
36-22
14-97
n-8i
.21-41
45'4 T
11-09
.44-69
e 15.
3
49-O6
ne 20.
48-57
49-13
49-17
48-55
49-26
49-14
48-99
48-82
51-86
54-31
49-32
49-19
49-18
me 23
48-88
49-26
49-30
49-39
49-39
49-33
49-35
49-28
50-58
49-40
49-43
49-40
49-40
48-85
49 -I 7
49-46
49-39
49-32
49-28
ae 24.
49-31
49-45
49-50
49-41
49-35
49-86
49-32
48-07
50-80
49'37
49-33
49-17
49-21
tie 26.
18-26
18-28
18-21
18-07
18-24
18-12
16-45
20-19
18-21
18-02
18-04
18-29
1778
18-16
Obser
Obs
49-14
49-18
49-27
49-15
49-00
48-83
49-33
49-20
49-18
Obs
49'30
49-39
49-39
49-33
49-35
49-40
49H3
49-40
49-40
46-46
49 '39
49-32
49-28
Obse
49-45
49-50
49-41
49-35
49-32
49-37
49-33
49-17
49-21
Obse
18-28
18-30
18-23
18-26
18-14
18-22
18-03
18-05
18-30
18-17
ver H T. Transit
48 Librae
D.
p
5.
E
E
E
E
E
E
E
E
W
W
W
W
W
w
D.
E
K
E
E
E
E
E
W
W
W
W
W
W
W
W
W
W
w
;.
w
w
w
w
w
w
w
w
w
w
w
E
E
).
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
9
7
9
4
9
9
7
9
IO
10
9
9
9
9
9
9
9
8
8
9
8
10
10
10
9
9
8
8
9
6
10
5
9
8
9
8
9
9
9
7
9
9
IO
10
9
8
5
9
9
9
9
9
5
9
9
9
9
9
9
r
1 1 "680
11-700
> >
i >
8 '943
1 1 '027
11700
ii
ii
H
11700
i
)
i
)
9-019
11*151
I2'2I9
II700
II
j
t|
II'50I
II7OO
M
II700
II
11
>
j
11-977
14-638
11-700
11-700
> i
i >
) >
i
D
D
i
j
i
h m s
I5.5I.20-77
16. 53. 46-24
16. 55. 22-57
16. 56. 25-12
17. 3.23-81
17. 8. 56-16
17. 10. 30-37
17. 13. 44-80
18. 6. 45-67
18. 6. 41-20
18. 14. 56-09
18. 18. 8-08
18. 28. 32-59
18. 32. 29-82
18. 35- 34-55
17. 20. 21-92
17. 24. 2-57
17. 27. 13-33
17. 29. 7-97
17. 30. 36-98
17- 34- 33-40
1 8. 6. 43 -96
1 8. 6. 42-02
18. 7.21-69
18. 14. 55-86
18. IB, 7-94
18. 28. 32-50
18. 32. 29-80
18. 35. 34-49
18. 45. 18-34
1 8. 48. 34-93
18. 50. 30-01
18- 53- 55-85
1 6. 39. 27-66
16. 46. 22-56
16. 49. 56-14
16. 51. 46-12
17. 3. 23-81
17- 8.42-53
17. 20. 22-16
17. 27. 12-72
17.29. 7-92
i?- 30. 37-oi
18. 5-37-61
18. 5.38-52
18. 32. 30-04
17. 9.27-17
17. 10. 19-61
17. ii. 1-26
17- M- 15-57
17. 16. 21-16
17- 17- 58-35
17. 19. 30-12
17. 20. 53-13
17. 27. 44-38
17. 29. 38-96
17.30. 778
17-34- 4-38
17.36.41-27
17-37- 5 I- 89
17. 40. 29-70
5
21'lg
46-I8
22-35
22-08
23^0
56-06
3O-O8
44-92
38-55
36-50
5^25
8'35
3279
29-70
34-74
21^8
2'79
I2-9I
7'97
37-14
33-7I
37^4
S?^ 2
16-61
56-10
8-29
3277
29-76
3476
18-35
40-78
30-36
55-98
2771
22-55
56-18
46-12
23-84
42-43
22'l6
12-66
7-91
37-04
37-13
35-62
29-80
27-30
19-63
I'll
16-03
2 1 'OS
58-8I
30-61
53-36
43-94
39-11
8-18
477
4174
52-12
30-24
3
IO'2I
35'32
II'52
"'S3
IS'"
45 '37
19-32
34-08
26-92
26-92
45-3
57-32
21-85
19-05
2372
11-36
51-89
2-09
57-29
26-31
22-91
26-64
26-64
6-31
45'34
57-35
21-89
19-08
23-76
7'54
27-45
19-41
45-23
1 6 -80
1 1 -So
45-40
35-33
I3 -I 4
31-88
II-37
2-09
57-30
26-34
26-52
26-52
19-09
4539
3778
I9-33
34-12
39-28
16-71
48-70
11-38
2-08
57-3I
26-33
22-93
59-82
10-29
48-23
8
49-02
49-I4
49-I7
49-45
49-21
493I
49-24
49-I6
4837
50-42
49-05
48-97
49 -06
49^5
48-98
49-38
49-10
49-18
49-32
49'7
49-20
49-60
49-12
49-70
49-24
49-06
49-12
4932
49-00
49-19
46-67
49-05
49-25
49-09
49-25
49-22
49-21
4930
49-45
49-21
49'43
49-39
49-30
49-39
50-90
49-29
18-09
18-15
18-22
18-09
18-20
17-90
18-09
18-02
18-14
18-20
18-15
18-16
1 8 -08
18-17
17-99
s
49-02
49-14
49-I7
49-21
49-3I
49-24
49-16
49-05
48-97
49-06
49"35
48-98
49-38
49-32
49-17
49-20
49-24
49-06
49-12
49-32
49-00
49-19
49-05
49-25
49-09
49-25
49-22
49-21
49-3
49-21
49'39
49-30
49-29
18-10
18-16
18-23
18-09
18-20
17-90
18-09
18-02
18-20
18-15
18-16
1 8 -08
18-17
17-99
Ursae Minoris
rver H. Transit 1
ft Bootis
if< Bootis
a Herculis
a Serpentis
Serpentis
51 Libra
Groombridge 750 S.P
Groombridge 750 S.P
TJ Serpentis
21 Sa^ittarii.
<j/ Ophiuchi
v Ophiuchi ...
49 Hercuus
2 A-quilae .
7'-* Ursse Minoris
erver H. Transit j
?7 Librae ...
a Coronse
a Serpentis
Serpentis
5 Scorpii
Groombridge 750 S.P
5 Ursse Minoris
Groombridge 750 S.P
Heroulis
24 Ursa; Minoris
49 Herculis
K Ophiuchi
e Herculis
t Prsae Minoris
( Draconis
5 Herculis
Cephei 51 S P
IT Herculis
Ophiuchi
w Herculis
rver H. Transit 1
25 Scorpii
Groombridfte 2283
o Coronae
49 Herculis
BAG 5700
a Serpentis ...
e Serpentis
( Ursae Minoris
<r Ophiuchi
48 Librae
Groombridge 7508.?..;....
Groombridge 750 S.P
5 Ophiuchi
| Serpentis
5 Ursse Minoris
A. Ophiuchi
B.A.C. 5579
rver H. Transit I
a Herculis
TT Herculis
| Ophiuchi
w Herculis
B.A.C. 5866
6 Ophiuchi
cr Ophiuchi
a. Ophiuchi
o Serpentis
BAG 5700
58 Opbiuchi
# Ophiuchi
3 Sagittarii
STAR-TRANSITS OBSERVED AT PARIS AND RESULTING CLOCK ERRORS.
159
Star's Name.
* E
rfl
Observed
Transit.
f-i
Star's Name.
Observed
Transit.
III
00.3
3.2
8 Urste Minoris ..
& Urste Minoris...
24 Ursro Minoris .
7) Serpentis
21 Sagittarii
i Aquilfe
Groombridge 2283
Groombridge 2283 ....
K Librae
7j Libne
a Serpentis
e Serpentis
f Ursse Minoris
Groombridge 750 S.P.
Groombridge 750 S.P.
49 Herculis
B.A.C. 5700
K Ophuiehi
29 Ophiuchi
i Ursse Minoris
30 Scorpii
{ Ophiuehi
w Herailis
o- Ophiuehi
6 Draconis
7) Ophiuehi
( Draeonis
v Herculis
| Ophiuehi
w Herculis
<? Ophiuehi
$ Draconis
a Ophiuehi
| Serpentis
ft Herculis
v Ophiuehi
7 Draconis
5 Ursne Miuoris.
e Serpentis
6 Libra;
1 Scorpii
Groombridge 750 S.P.
Groombridge 750 S.P.,
\j/ Ophiuehi ,
X Ophiuehi
7) Draconis
A. Ophiuehi
B.A.C. 5700
K Ophiuehi 1
29 Ophiuehi
c Ursie Minoris
Draeonis
| Serpentis
o Serpentis
e Serpentis
f Ursis Minoris
48 Librae
S Seorpii
Groombridge 750 S.P. .
11-244
9-288
10754
1 1 700
12-240
7 '449
11-703
9-334
10-337
11700
12-912
11-700
1 1 -700
12-862
11-700
10-496
8'3'S
11-700
11-964
11-700
11700
13-846
11-700
12-470
1892 June 26. Observer H. Transit D. continued.
18. 7. 16-82
18. 7-13-37
18. 10. 53 -80
1 8. 15. 26-93
1 8. 1 8. 38-93
1 8. 29. 3-54
15. 12. 34-37
15. 12. 29-17
I5-35.2S-95
15- 37. 42-52
15. 38. 39-80
15.45. 8-81
I5-47.4478
16. 2. 1 1 '53
1 6. 2.
16. 46.
1 6. 50.
16. 52.
16. 55.
16. 56.
17. 9-
17. 14.
17. 16.
17. 20.
17. 27.
7'54
53-27
26-50
16-87
15-52
57-28
18-57
15-31
21 -OO
52-8 4
44-21
17. 4. 54'lS
17. 8. 13-43
17. II. 0-53
17. 14. 15-09
17. 16. 20-36
17. 24.33-00
17. 27.43-40
17- 29. 38-35
I7-3I- 7-4I
17.41. 57-16
17. 52. 48-10
17- 54- 4971
18. 7 8-94
15.45. 8-65
15. 47. 23-21
15. 58. 52-02
16. 2. 16-39
1 6. 2.
16. 17.
1 6. 20.
16. 22.
1 6. 25.
1 6. 50.
16. 52.
16. 55.
1 6. 56.
17. 27.
17-31.
17- 35-
12-38
29-69
28-66
16-31
10-70
26-29
16-31
15-29
54'SS
43 ' 6 '
7-18
377
'5-45- 7-85
15.47-44-88
15. 51. 50-49
15- 53- 3879
16. 2. 8-14
6-98
8-28
48-05
27-27
39-40
3'93
26-27
26-27
5-92
45-38
5739
21-92
19-29
17-99
17-87
18-11
17-99
17-99
17-87
18-11
17-99
17-99
29 Sagittarii ...,
ft 1 Lyrse
Cephei 51 S.P. .
t Aquilse
o Sagittarii
Aquilae
1892 June 27. Observer H. Transit D.
15-22
13-5
26-87
43-39
40-38
9-42
42-21
18-40
18-56
53-52
27-12
17-19
16-12
52-81
19-27
15-95
21-02
53'22
43'SO
3075
375
45-25
1-59
58-70
27-74
0-89
36-42
36-42
II-8I
34^9
11-02
37-33
34-I3
39-26
11-38
2-08
I5-53
17-25
18-38
1 8 -20
18-32
18-32
18-68
18-02
17-86
18-29
18-29
18-16
18-17
18-21
1 8 -06
18-18
18-24
18-16
18-28
18-40
18-22
18-34
18-34
18-30
18-30
18-17
18-18
18-07
18-19
18-25
18-17
o Ophiuehi
{ Serpentis
58 Ophiuehi ....
H Herculis
B.A.C. 6034....
y Draconis
67 Ophiuehi ....
8 Ursae Miuoris.
8 Ursse Minoris W
24 Ursse Minoris W
7) Serpentis W
'w
w
w
\v
\v
W
w
( Aquilae .
d Sagittarii
a Aquilae
v Sagittarii
8 Aquilse
0'Cygni
\ Ursse Minoris.,
A Ursae Minoris..
20-45
33-33
43-34
49-66
5'97
13-16
31-81
I9-33
34-I4
39-28
5!"93
2-07
57'32
26-37
15-99
7-05
8-37
25-97
1 8 -68
18-64
1874
1874
18-83
1 8 -60
1873
1879
1 8 -66
1872
1 8 -68
1871
20 'oo
18-69
1875
1875
18-84
18-61
i8 : So
18-67
18-72
18-68
8 Ursae Minoris...
24 Ursae Minoris .
77 Serpentis
21 Sagittarii
a Lyre
2 Aquilse
' Lyrae
Cephei 51 S.P
Cephei 51 S.P. ,
d Sagittarii
u Aquilse ...
v Sagittarii .
1892 June 30. Observer H. Transit D.
8-61
23-26
52-08
18-60
16-31
29-61
28-56
15-61
10-53
26-20
16-10
15-19
52-40
43-08
7-07
3-66
2773
42-44
11-38
49-02
47-89
34-66
29-91
45-42
35-35
34-30
10-76
2-07
26-36
22-96
19-12
19-18
19-30
18-37
20-66
19-41
19-33
19-05
19-38
19-22
19-25
19-11
18-36
18-99
19-29
19-30
19-15
19-21
I9-33
1935
19-40
19-23
19-26
19-12
19-30
19-30
58 Ophiuehi ....
Ophiuehi
B.A.C. 6060
p l Ophiuehi
8 Ursae Minoris .
8 Ursse Minoris .
1 Aquilje
a Lyrte
2 Aquilae
29 Sagittarii
3* Lyrse
Cephei 5 1 S.P...
Aquilse
d Sagittarii
aiAquihe
v Sagittarii
1892 July 1. Observer H. Transit D.
8-05
41-68
50-89
39-30
19-41
2773
0-58
10-25
58-77
37-16
19-68
18-90
19-36
19-47
1775
1970
19-38
19-49
Groombridge 750 S.P I W
a Scropii W
* Ophiuchi W
X Ophiuehi W
7j Draconis
1892 June 29. Observer H. Transit D.
11-700
M
11-229
II-7OO
II-70O
10-495
9-902
II-58 4
II-7OO
II-287
I3-998
12-469
1 1 -700
I2-O39
13790
II-7OO
II-700
1 1 -467
6-6I9
1 1 -700
11-997
II-7OO
I5-34I
II-70O
18. 42. 59-55
18. 45. 49-54
1 8. 50. 4-87
18. 54.27-03
1 8. 57- 56-56
1 8. 59. 10-49
17. 29. 38 '66
17.31- 7'5o
17. 36. 40-86
17.41- 57 62
17. 45. 9-04
17. 53. 50-48
I7.54.57-4I
18. 7. 18-96
18. 7.
1 8. 10.
18. 15.
19. o.
19. ii.
19. 12.
19. 15.
19. 19.
19. 26.
19. 32.
15-36
55-43
26-48
10-05
2-27
28-10
15-82
46-43
5-20
79
19. 32. 24-95
18. 7. 13-14
18. 10. 55-64
18. 15.26-21
18. 18. 38-34
60-02
49-63
11-67
27-26
57-04
10-73
38-94
8-07
41-51
5770
9-66
50-10
57-80
7-99
8-54
47-70
27-07
10-50
3-01
28-57
16-53
46-98
5-52
45-15
52-37
17-89
7-57
2778
45-27
15-07
2879
57-31
26-34
59-83
15-98
27-97
8-37
16-17
26-16
26-16
578
45-39
28-81
21-27
46-85
3471
5-26
23'99
10-63
10-63
l8. 33. O'2I
18. 36. 4'8o 4-94
18. 45. 48-69 48-61
18. 49. 2-91 | 9-87
775 i 25-97
49-58
26-32
38'52
0-08
1 8. 49. 6-97
19. ii. 2-39 2-56
19. 12. 28-05 28-09
19. 15. 15-80 15-96
10-99
2-56
28-09
5-60
45-4I
57-43
I9-I4
23-84
7-60
28-O2
28-02
21-31
46-88
17. 36. 4071 j 40-64 5974
I7.37-5I-37
17. 49. 17-24
17. 59. 42-94
18. 7. 11-92
18. 7-
1 8. 29.
18. 33-
1 8. 36.
1 8. 43.
1 8. 46.
1 8. 49-
19. o.
19. ii.
19. 12.
19. 16.
7-55
2-98
0-46
4-92
59-04
48-65
8-66
9'74
2-43
27-96
15-88
16- 2. 9-85
16. 14. 19-39
16. 17. 29-04
16. 20. 28-13
16. 23. 16-07
51-19
17-14
42-77
14-46
6-23
2-99
0-34
4'93
59-09
48-58
lO'II
972
2-50
27-94
15-93
19-40
20-09
29-67
2875
10-32
36-18
2-03
25-88
25-88
21-97
19-14
23-85
I7-94
7-60
28-06
28-84
21-32
46-89
34-88
49-04
47-89
17-87
I7-94
16-11
1 8 -oi
18-03
18-06
i8-37
18-27
18-32
18-28
18-31
18-27
18-37
18-17
17-62
18-08
18-32
18-31
18-26
18-28
18-18
18-28
18-47
25-48
18-26
18-22
16-02
19-09
18-91
19-06
18-90
18-99
18-15
17-03
18-75
1879
1878
19-10
19-13
19-04
19-26
11-42
19-65
18-98
1 8 -80
18-92
18-85
19-02
I7-95
19-12
18-82
18-95
18-95
1776
I9-47
I9-37
19-14
I9-33
I7-86
I7-93
i8 : oo
1 8 -02
18-05
18-37
18-27
18-32
18-28
18-31
18-27
18-37
18-32
18-30
18-25
18-27
18-17
18-27
18-46
1874
18-78
1876
19-10
19-13
19-04
19-26
18-97
1879
18-91
18-84
19-01
19-11
18-81
18-93
18-93
19-49
I9-39
19-16
160
TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1892.
Star's Name.
Position.
So. ot Wires. 1
R.A.
Micrometer.
Observed
Transit.
Corrected
Transit.
Tabular
Apparent
K.A.
Clock
Apparently
Slow.
Clock
Apparently
Slow at i8 h
Sidereal.
Star's Name.
Position.
No. of Wires. 1
A. A.
Micrometer.
Observed
Transit.
Corrected
Trausit.
Tabular
Apparent
E.A.
SIN
3|S
<!
&-
gg-S
gi:i
$%*
W
W
W
w
w
w
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
B
E
E
E
E
E
B
B
E
E
E
E
E
W
W
W
w
w
w
w
E
E
E
E
E
E
E
E
E
E
E
W
W
W
W
W
W
9
8
7
9
9
10
10
9
5
9
8
7
9
9
10
7
9
9
9
9
10
9
5
9
9
9
7
9
9
9
9
9
9
10
9
9
9
5
9
9
9
6
9
9
9
9
10
7
7
9
9
9
9
9
9
9
9
9
9
9
9
9
r
II7OO
ii
ii
ii
12-943
I5'OI2
II7OO
II
1}
II
VI
11
5-438
11700
)J
M
II
12770
II7OO
it
tt
II
>1
II
9 }
||
I I '680
II
||
J)
1 I -740
1 1 -680
M
II
11
J)
II
II
I 1
I I '680
io'357
1 1 -680
11
ii
i
i
ii
ii
i
189
h m s
16. 24. 39-45
16.35. I' 6 5
16. 36. 55-55
1 6. 46. 52-44
16.52. 1574
16. 56. 55-11
16. 56. 56-01
17- 8.13-83
17. 9-25-97
17. n. 0-14
17. 16. 20-01
17. 29. 37-82
17. 31. 6-72
17- 37- 5 76
16. 2. 5-90
l6. 22. 16-28
16. 25. 10-04
16. 46. 52-16
16. 52. 15-58
16. 55. 52-12
16. 56. 56-37
'17. 8. 13-61
17. 9.25-70
17. 16. 19-85
17. 20. 51-60
17. 24. 32-02
17.27.43-15
17- 29- 37-53
17. 31. 6-30
1 6. 24.37-89
16. 46. 50-49
16. 51. 23-72
16. 52. 14-05
16. 56. 52-70
17- 4- 5I-53
17. 8. 11-24
17. 10. 16-54
17. 10. 58-01
17.41. 54-90
17.45. 6-47
! 7- 53- 4576
17- 53-47-36
I7-54-55-05
17. 57. 27-02
17. 59- 40-81
16. 52. 12-89
16. 56. 48-15
17. 8. 9-42
17. 9. 22-84
17. 14. 1173
17. 16. 16-86
17. 17. 54-45
17. 19. 26-44
17. 20. 49-16
17. 27. 39-80
17. 29. 35-00
17- 45- 574
17. 49. 14-06
17. 52. 44-96
17.54.54-18
17. 57. 26-06
17- 59- 39'99
2 Ju
40-03
2-26
55-54
52-65
1 6 -02
51-07
5 1 '63
I2'6l
25-93
59-8i
'975
37-8o
6'97
50-82
18
1473
15-32
10-29
52-26
15-76
52-01
51-60
12-38
25-81
19-72
51-84
32-56
42-57
37-66
6-74
1
38-23
50-58
24-09
14-18
49-48
51-87
10-41
16-53
57-8?
54-86
6-83
46-04
46-97
55-23
27-04
40-99
1895
13-3
48-18
973
23-25
12-17
17-25
54-89
26-88
49-58
40-17
35-4I
6-17
14-49
45'3
54-59
26-45
40-40
iy i-
8
59-33
21-64
14-94
11-81
3535
io"66
10-66
31-76
45-40
19-32
39-28
57-33
26-37
10-32
92 J
37-36
34-62
29-90
ii'8i
35-35
11-52
io-57
3' 74
45-40
39-27
11-40
5I-95
2-05
57-33
26-37
892
59-32
1 1 -80
45-43
35-35
9-99
I3' J 9
31-61
37-79
19-29
16-00
27-81
7-11
8-34
16-24
48-13
2-08
I Jul
35-34
9-64
31-52
45-40
34-I7
39-27
1677
4876
11-42
1-97
5734
27-82
36-25
7-12
16-24
48-I3
2-09
Obse
8
19-30
19-38
19-40
19-16
I9-33
I9-59
19-03
19-15
I9-47
19-51
19-53
I9-53
19-40
19-50
aly 2.
22-63
19-30
19-61
19-55
19-59
19-52
18-97
19-36
19-59
19-55
19-56
19-39
19-48
19-67
19-63
July E
21-09
21'22
21-34
21-17
20-51
2I-32
21-20
21-26
21-42
21-14
20-98
2I-O7
21-37
21-01
2I-O9
21-09
y n.
22-04
21-46
21-79
22-15
22-00
22-02
21-88
21-88
21-84
2 1 'SO
21-93
2I-65
21-76
2174
2I-65
21-68
21-69
rver I
8
I9-3I
19-39
I9-4I
I9-I7
19-34
19-48
I9-52
19^4
I9-53
I9-40
I9-50
Obse
19-62
19-56
19-60
19-53
19-60
19-56
19-57
i9'39
19-67
19-63
. Obs
21-11
21-23
21-35
21-18
21-33
21-27
21-43
21-14
20-98
21-07
21 "OI
21-09
21-09
Obsei
22-05
22-16
22 -O I
22-03
21-89
21-88
2I-84
21-93
2I-65
21-76
2174
2I-65
21-68
21-69
'.. Transit D. con
tin
E
E
E
E
W
W
W
W
w
E
E
E
E
E
E
E
E
W
W
W
w
w
w
w
w
* .
w
E
E
E
E
E
E
E
E
W
W
W
w
w
w
D.
w
E
E
E
E
E
E
E
E
E
W
W
W
w
w
w
w
net
9
9
9
10
10
9
9
7
10
IO
9
9
10
9
9
9
8
10
10
8
9
5
9
9
9
5
D.
10
IO
9
9
9
7
9
7
IO
IO
5
9
9
9
9
IO
IO
9
9
9
9
9
7
9
10
IO
9
9
9
9
9
9
i.
r
II7OO
1 1
i
IO'222
IO-532
II7OO
jj
10-868
10-489
11700
ii
n
II-7OO
H
If
14-995
5-609
11-700
tt
14713
II7OO
II
||
13-821
12-158
1 1 -680
> i
II
|*|
D
11
13-153
12-060
i i -680
11
> i
n
))
11-648
14-266
11-680
II
II
) i
>'
12-618
12-911
11-680
)i
ii
1 1
h m s
17. 14. 56-67
17. 57- 28-83
17. 59. 42-59
18. 7- 15-51
18. 7. 12-83
18- 32- 59-56
18. 42. 58-12
18. 45. 48-21
18.49. 3-74
1 8. 49. 0-09
1 8. 54. 25-96
i8.57.55-5i
19. o. 9-47
17-35- 3'i6
17- 37- 50-50
17- 52-47-13
17. 59. 42-22
18. 7.I5-33
18. 7. 11-93
18. 29. 1-94
18. 32. 59-66
1 8. 48. 58-67
19. 15. 14-99
19. 19.45-48
19. 26. 4-40
19.45. !3'24
18. 7. 10-71
18. 7. 10-32
18. 15. 24-00
18. 18.35-90
18. 29. 0-56
18-33. 58-oi
18. 36. 2-54
18. 42. 56-77
18. 49. 1-41
18. 49. 0-36
18. 51. 58-27
18. 54. 24-17
1 8. 57. 53-88
19. o. 773
19. 3. 1-68
18. 7. 2-74
1 8. 7. 1-61
1 8. 15.23-14
18. 18. 35-20
18. 28. 59-85
18. 32. 56-65
1 8. 36. 1-66
18. 42. 55-81
18.45.45-43
18. 49. 9 64
18.49. 7-49
18. 54. 23-18
19. o. 6 -So
19. 3. 0-99
19. 12. 24-85
19. 15. 12-95
19. 19. 29-29
s
56-54
28-72
42-68
5-15
7-44
59-52
58-51
48-21
10-74
10-03
25-95
55-77
9-49
3'57
5073
47-5i
42-48
3-85
5-03
2-25
5953
7-48
I5-37
4570
4-39
13-42
2-87
4-16
24-10
36-12
0-69
57-8o
2-68
56-98
9-12
8-23
58-48
24-14
54-09
7-71
1-89
2-13
2-46
23-46
35-50
0-16
57-oo
1-97
56-12
45-78
9'34
7-35
23-50
7-12
1-28
25-17
13-25
29-61
s
I5-99
48-10
2-04
2579
2579
19-15
17-96
7'6l
28-10
28-10
45'33
iS'JS
28-85
22-97
10-33
7-07
2-04
25-70
25-70
21-99
19-15
28-15
34-91
5-33
24-06
32-91
24-73
24-73
45-48
57-52
22-05
19-18
23-94
18-04
29-00
29-00
19-63
45-40
15-24
28-93
22-98
24-13
24-13
45-49
57-54
22-07
19-18
23-96
1 8 -06
7-67
29-61
29-61
45-42
28-95
23-01
47-01
35-02
51-45
8
'9'45
19-38
19-36
20-64
i8'35
19-63
!9'45
19-40
17-36
18-07
19-38
19-38
19-36
19-40
19-60
19-56
19-56
21-85
20-67
1974
19-62
20-67
I9-54
19-63
19-67
19-49
21-86
20-57
21-38
21-40
21-36
21-38
21-26
21-06
19-88
20-77
21-15
21-26
21-15
21-22
2I-O9
22-00
21-67
22-03
22-04
21-gi
22'lS
21-99
21-94
21-89
20-27
22-26
21-92
21-83
21-73
21-84
21-77
21-84
s
!9'45
19-38
19-36
19-63
19-44
J 9'39
I9-37
I9-37
I9-35
19-40
19-60
19-56
19-56
1974
19-62
I9'53
19-62
19-66
19-48
21-38
21-40
21-36
21-37
21-25
21-05
21-14
21-25
21-14
2I'2I
21-08
22-O3
22-04
21-91
22-18
21-99
21-93
21-88
21-91
21-82
2172
21-83
21-76
21-83
B.A.C. WQ.
96 Herculis
p 1 Ophiuchi. ,
S Ursa? Miuoris
ic Opliiuchil
S TJrsae Minoris
t Ursfe Minoris
a Lyrae
29 Sagittarii
' Lyrae
a Herculis
Cephei 51 S.P
TT Herculis
Cephei 51 S.P.
a Ophiuchi
Serpentis
o Sagittarii . ...
j8 Ophiuchi
Aquilae
Groombrid^e 750 S.P. ...
rver H. Transit D
o Serpentis
Ophiuchi
p l Ophiuchi
K Ophiuchi
5 Ursa; Minoris
e Herculis
8 Ursfe Minoris
a Lyrse
Cephei 51 S.P
<r Ophiuchi
v Sagittarii
c 2 Ophiuchi..
8 Aquilse
a Ophiuchi
Serpentis
>erver H T. Transi
5 Ursa; Minoris
49 Herculis
8 Ursffi Minoris
B A C 5700
e Ursfie Minoris
21 Saoittarii
i Aquilae
5 Herculis . .
2 Aquilse
29 Sagittarii
fj. Herculis
Cephei 51 S.P.
Cephei 51 S.P
B A C 6034
1? Sagittarii
y Uraconis
e Aquilse
67 Ophiuchi
o Sagittarii
96 Herculis
( Aquilse
p 1 Ophiuchi ..
ir Sagittarii
ver H T. Transit
8 Ursee Minoris
5 Ursce Minoris
77 Serpentis
21 Sagittarii
i Aquilse
B A C 5866 . .
a Lyrse
j8 Lyrse
Cephei 51 S.P
BAG 6034
Cephei 51 S.P
B A C 6060 .
AquiUe
01 Aquilse
v Sagittarii
On July 2 Groombridge 750 S.P. and Cephei 51 S.P. were observed on wire IX.
STAR-TRANSITS OBSERVED AT GREENWICH AND RESULTING CLOCK ERRORS.
161
Star's Name.
" ~
Observed
Transit.
r=!H
Ill
ji^
MS"'
y t* ;
Star's Name.
Observed
Transit.
.
IP
f Hcrculis
K Ophiuchi
i Ursa; Minoris
ij Ophiuchi
( Draconis
11-680
11-869
11-680
1892 July 15. Observer H T. Transit D.
1 6. 36. 51-94
16. 52. 12-34
1 6. 56. 47-66
17. 3. 50-23
17. 8. 8-68
52-36
12-84
4672
50-81
8-80
14-85
35-32
9-16
13-18
3'"4I
22-49
22-48
22-44
22-37
22'6l
2249
22-38
a Herculis .
ir Herculis .
/3 Ophiuchi ._ .
H Herculis
1 i -680
1 1 -680
17. 9. 22-49
17. ii. 56-33
17- 37- 47 5
17.41.53-15
22-97
56-72
48-01
53-57
45 '39
19-23
iQ'35
15-99
22-42
22-51
22-34
22-42
22-43
22-52
22-34
22-42
t Ursa; Minoris.
( Draconis
1 1 -448
11-680
16. 56. 45-86
17. 8. 7-64
1892 July 20. Observer H T. Transit D.
45 '92
7'97
9-04
31-25
23-12
23-28
a Herculis .
w Herculis ,
1 1 '680
17. 9.21-84
17. 10. 55-62
22-26
56-02
45 '37
19-19
23-11
23-17
23-12
23-18
A Ursa; Minoris.
a Aquilse
/3 Aquilffi
.3-887
11-680
1892 July 22. Observer H T. Transit D.
19-31.39-99
19-45- 8-93
19. 49. 38-63
3906
9'34
39 '04
5-92
33'H
2-78
26-86
23-80
23-74
2373
6 Aquilse
$- Capricorni.
t Delphini ....
1 1 -680
2O. 5. 22-24
20. 14. 35-16
20. 27. 41-38
22-64
41-78
46-32
59-I9
5-45
23-63
23-67
23-66
23-61
23^5
STAR-TRANSITS OBSERVED AT PARIS
AND
RESULTING CLOCK ERRORS.
1892 June 7. Observer K. Transit E.
S Ursa; Minoris.
i\ Serpentis
14-142
13-460
18. 6. 37-86
18. 14. 5679
56-63
27-20
45-11
48-42
48-48
48-47
21 Sagitturii.
W
13-460
18. 18. 8-83
8-67
57-08
48-41
48-40
1892 June 8. Observer H. Transit E.
Polaris S.P W
Polaris S.P
86 Virginis
n Bootis
B.A.C. 4666
T Virgiuis
a Draconis
Arcturus
\ Virginis
2 Libne
a 2 Librae
3 Urs;e Minoris
20 Libra
iji Bootis
Groom bridge 2283 .
I4-I37
388
450
14-707
13. 17. 56-42
13- 39-
13. 48.
13- 53-
13- 55-
14. o.
14. 9.
14. n.
14. 15.
14. 44.
14. 50.
14. 56.
14. 59-
15. ii.
59-70
23-81
45-45
36-24
22 "O I
42-22
57-04
29^3
50-I8
7-65
I7-6S
58-49
2- 5 6
49-40
47^4
23-29
45'OS
3574
21-56
42'32
56-68
28-51
49-67
7-11
18-16
57-9I
2-24
54-21
34 '2 1
34'2i
12-25
34-06
24-52
10-40
31-05
45-70
17-41
38-42
55-82
6-46
46-63
50-98
38-36
49-85
48-96
48-98
48-78
48-84
4873
49-02
48-90
4875
4871
48-30
4872
48-74
44-I5
49-09
49-11
48-90
48-96
49-14
49-01
48-86
48-81
48 ; 8i
48-83
Groombriilge 2283 W 10
42 Libra;..' W 9
K Librte W 9
o Serpentis Wj 9
3 Serpentis W 9
ir Scorpii Wj 4
S Scorpii : W ; 9
Groombridge 750 S.P E
p Ophiuchi E
7j Draconis
\ Ophiuchi E
C Herculis ... .. E
< Urste Minoris W 9
21 Sagittarii W 9
8-274
I3-450
15-246
6-232
I3'450
12-450
13-45
15. ii. 44-31
I5-33- 6-95
15. 34-56-69
IS- 38. 9-95
15.40. 25-38;
15.51.32-63
15. 53. 10-19
16. I. 50-58
16. i. 46-07
16. 18. 20-43
16. 21. 46-18
16. 24. 41-57
16. 36. 26-37
49-12 , 38-36
6-37 ! 55-66
56-14 , 45-24
9-52 i 58-71
25-00 14-07
32-04
9-62
47-01
42-50
I9-S5
46-20
41-12
26-07
21 -OI
5873
32-96
8-53
34-98
29-83
I4-95
16. 56. 19-93 : 21-36 , 12-10 50-74
18. 18. 8-40, 7-84 57-10' 49-26
49-24
49-29
49-10
49-19
49-07
4<>"97
49-11
50-46
48-68
4878
4871
48-88
49-36
49-I7
49-26
49-I4
49 '03
49-I7
4S-73
48-76
48-92
QKBENWICH OBSERVATIONS, 1899.
162
TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1892.
Star's Name.
No. of Wires.
R.A.
Micrometer.
Observed
Transit.
Corrected
Transit.
Tabular
Apparent
R.A.
Clock
Apparently
Slow.
Clock
Apparently
Slow at i8 h
Sidereal.
Star's Name.
Position.
No. of Wires.
R.A.
Micrometer.
Observed
Transit.
Corrected
Transit.
Tabular
Apparent
K.A.
Clock
Apparently
Slow.
Clock
Apparently
Slow at i8 h
Sidereal.
Polaris S.P
W
E
E
E
E
E
E
E
E
E
E
E
E
E
W
W
W
E
E
E
E
E
E
E
E
E
W
W
W
w
w
w
w
w
w
w
w
w
w
E
w
E
E
E
E
E
E
E
W
W
W
w
w
w
w
w
E
E
IO
IO
7
9
9
9
9
9
9
5
9
9
9
5
1
10
10
6
8
6
9
9
9
9
IO
IO
6
IO
9
9
9
9
9
9
9
9
9
10
10
9
9
9
9
9
9
9
10
9
9
9
5
9
5
IO
10
8
r
14-614
11-061
I3-450
II
11
t)
it
H-673
I3-450
14-419
11-135
13-500
II
) 1
13-245
9-822
13-500
15-818
13-500
13-500
M
jj
11
>
I4-03I
14772
11
13-004
10-894
13-500
H
it
it
16-580
12-040
8-753
13-500
h m s
13. 18. 4-18
13- 18. S'37
13.55.21-38
13- 59- 47-23
14- 4- 9'43
14. 9. 56-43
14. 12. 28-72
14. 26. 23-27
14. 35. 12-19
14. 36. 35-03
14. 39. 28-87
14. 54. 25-19
14- 57- 5'53
15. 11.42-42
15. 27. 29-19
15.28.41-95
13. 18. 19-51
13. 18. 18-20
14. o. 39-29
14. 9. 55-56
14. 23. 11-63
14. 26. 21-74
14. 35. 10-94
14. 39-27-63
14. 44. 6'2i
15. II. 38-30
15. II. 28-10
15- 57.37-12
15. 58. 2 1 'O8
16. i. 54-30
16. 9.49-19
17- 8.53-13
17. 34. 30-73
17. 37. 17-89
17. 41. 23-48
17. 43. 16-16
17- 46. 13-58
17- 53- I5-53
I7.56.55-67
13. 17. 49-00
13. 17. 54-22
14. 34. 7-64
14. 36. 30-44
14. 39- 24-57
14. 44. 2 - 6i
14. 50. 12-44
'4-58. 57-55
15. 11.40-39
15.11.3875
15.27.2478
15. 29. 15-19
I5-37- 8-27
15.38. 5-16
15. 40. 20-42
16. i. 44-12
16. o. 39-31
1 6. o. 37-03
16. 36. 19-24
18!
s
46-70
20-73
46-50
8-64
27-96
22-84
11-62
34-32
28-41
24-46
5-21
28-45
41-17
189
45-57
47-32
39-59
54-66
10-40
21 -OO
9^7
26-85
4-8?
5335
4479
35-89
1975
44-39
48-60
189
5270
29-95
17-33
23-23
1579
12-83
15-80
55-32
18
43-05
45-21
7-67
30-40
24-64
2-54
12-94
57-62
43-69
4370
24-80
15-33
8-27
5-23
20-51
42-13
18
39-12
37-66
I9-3 1
)2 Ji
8
35-22
35-22
10-39
36-00
57-99
45-69
17-41
12-34
1-13
23-63
18-03
1376
5479
37-98
18-24
30-88
2 Ju
37-10
37-10
30-95
45-68
i-43
I2\33
18-02
55-8i
37-22
37-22
27-55
n'35
33-48
40-15
2 Ju
45-31
2278
10-16
15-88
8-34
5-56
8-30
47-94
12 Ju
38-81
38-81
I'll
23-61
18-01
55-81
6-21
50-96
36-52
36-52
18-25
8-84
1-59
5872
14-07
33-80
2 Ju
34-08
34-o8
14-96
me 9.
s
4971
48-52
49-66
49-5
49-35
49-78
49-45
49-50
49-51
49-31
49-62
49-3
49-58
46-44
49-79
4971
ne 11.
51-53
5078
51-36
51-02
51-03
si;is
50-94
43-87
52-43
51-66
51-60
49-09
51-55
ne 12.
52-61
52-83
52-83
52-65
52-55
5273
52-50
52-62
ne 13.
5576
53-60
53-44
53-21
53-37
53-27
53-27
53-34
52-83
52-82
53-45
53-51
53-32
53-49
53-56
51-67
ne 15.
54-96
56-42
55-65
Obsei
s
49^3
49-48
49-90
49-61
49-62
49-73
49-40
49-68
49-87
49-79
Obse
51-18
51-18
51-48
51-30
51-31
51-08
5174
51-68
51-63
Obse
52-64
52-85
52-66
52-56
5274
52-62
Obs(
53-58
53-35
53-51
53-40
53-46
53 : 55
53;6i
53-59
53-66
Obs
5571
pver H. Transit E
42 Librae
w
w
w
w
w
w
w
w
w
w
E
E
E
W
W
3.
w
w
w
w
w
w
w
w
w
w
E
E
E
E
E
?.
W
W
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
,W
W
W
W
W
I
E
E
E
E
9
9
4
6
9
4
9
9
9
8
IO
7
9
9
9
9
9
9
9
9
9
9
IO
10
8
9
9
9
9
IO
IO
8
9
9
9
5
9
I
9
9
9
7
9
7
10
IO
9
9
4
4
9
9
9
9
r
M
13-450
II-925
6-636
ISHSO
I3-500
1 >
1 }
H
jj
D
1 4 '680
13-500
D
ii
13-500
14-106
17-605
13-500
11
i>
13-500
11
j>
11
11
M
II
11
13795
7-132
13-500
jj
j >
11
13-500
11
H
1 1
h m 8
15. 33. 6-87
15- 37- I2 '79
15-51-21-32
15-53- 9-9i
1 6. 9. 50-93
16. 13. 21-29
16. 16. 59-97
16. 24. 47-28
16. 30.25-57
16. 36. 25-54
17. 52. 17-86
17. 56. 58-81
18. 10. 9-81
1 8. 6. 29-54
18. 18. 8-28
16. 11. 47-93
1 6. 13. 49-43
16. 16. 58-88
16.34.31-25
16. 36. 24-01
16. 39. 26-70
17. 4. 22-88
17- 7- 39-87
17. 9. 46-90
1 8. 6. 24-45
1 8. 10. 3-49
1 8. 18. 7-29
18. 28. 31-51
18.32. 27-88
18.38. 673
17-59- 975
18. 6.21-84
1 8. 6. 25-38
'8- 14- 53-32
18. 18. 574
18. 32. 26-31
18.35.31-98
1 6. 30. 21-23
1 6. 34. 28-29
1 6. 36. 21-47
16. 55. 17-99
17- 3- 1978
17. 7. 38-21
17. 9.44-16
17. 13. 40-81
17. 15. 45-69
17. 53. 14-60
18. 10. 10-73
1 8. 6. 29-64
18. 59. 34-77
19. 2. 28-90
19. 25. 29-96
19. 30. 13-04
16. 46. 16-22
16. 51. 39-63
16. 55. 15-87
17. 7. 36-26
a
6 -02
I2'OI
20-55
9-07
50-53
20-44
59-15
46-78
24-83
25-12
17-12
58-30
16-79
35-63
7-45
4679
48-02
57-55
29-94
23-37
25-29
2 1 '60
40-39
46-I5
35-64
15-00
5-87
30-26
27-29
5-22
9-16
33-39
3579
52-60
479
26-17
31-18
28-21
21-55
1807
1971
38-53
44-22
40-72
4578
1477
I3-33
28-88
30-11
13-07
16-30
3971
36-29
55-66
1-58
10-23
5873
40-15
10-22
48-95
14-60
I4-95
6-80
47-90
6-87
27-20
57-12
3S-20
39-5I
48-96
21-54
16-72
13-03
37-66
27-14
6-81
57-15
21-70
18-93
5676
1-83
27-10
27-10
45-19
57-17
18-94
14-63
2 1 '60
14-96
11-50
13-05
31-98
37-68
34-00
39-26
8-31
6-74
27-07
28-58
22-55
2375
676
1177
35-29
11-50
3I-97
s
49-64
49-68
49-66
49-62
4978
49-80
49 '80
4977
49-68
49-60
50-08
5i;57
51-41
51-49
51-41
51-60
51-59
51-43
51-43
51-60
51-51
51-81
51-28
5 I- 44
51-64
5I-54
52-67
5371
52-59
52-38
52-40
53-39
53-4I
53"43
53-41
54-oi
5373
53-69
55;47
55-68
s
49-65
49-68
49-86
49-85
49-82
49-88
49-68
49-60
49-66
5I-57
51-48
51-65
51-64
5I-48
5' '47
5I-55
51-27
51-42
51-62
52-67
5275
52-38
53-45
53-47
53;47
53-49
53-3I
53-5I
53;69
55-53
Polaris S.P.
T Virginia.
5 Scorpii
94 Virginia
BAG. 4700
A Virginia
j8 Herculis
p Bobtis
Ophiuchi
Herculis
p Virginia
y Ophiuchi
2 Bobtis ...
5 Libne
24 Ursae Minoris
5 Ursae Minoris
37 Librae
21 Sagittarii
srver H. Transit 1
Polaris S.P
Polaris S.P
tr Scorpii
a Draconis
BAG 5579
Arcturus
106 Virginis
25 Scorpii
p Bootis
Bobtis
2 Bobtis .
o 2 Libne
Groombridge 2283
Groombridge 2283
24 Ursae Minoris
51 Librae
jS 1 Scorpii
Groombridge 750 S.P
<f> Sagittarii
rver H. Transit 1
a Herculis
Ophiuchi
ft Herculis
B.A.C. 6030
B A.C. 6049
y Draconis
Polaris S. P
irver H. Transit 1
Polaris S. P
B. A. C. 5579....
fBobtia
/i Virginis
e 2 Bobtis
a 2 Librffi
j8 Ursai Miuoris
<ji Bobtis
Groombridge 2283
37 Lib
a Coronse
TJ Librae
a Serpeutis
^rver H. Transit 1
49 Herculis .
Groombridge 750 S. P.
Groombridge 750 S. P
Groombridge 750 S. P
( Herculis
K Ophiuchi
e Herculis
STAR-TRANSITS OBSERVED AT PARIS AND RESULTING CLOCK ERRORS.
163
Star's Name.
Observed
Transit.
ll
11
*
Star's Name.
1
. 0>
Observed
Transit.
1892 June 15. Observer H T. Transit E. continued.
S Herculis
w Herculis
iSDraconis
a OpMii<-hi
o Serpentis
Opninohi
B. A. C. 6069...
7 Draconis
96 Herculis
S Ursre Miuoris ,
13-500
I4176
17- 9- 42'09
17- I5-43-5
17. 27. 6-34
17.29. 1-54
17. 34. 27-20
17. 37. 14-52
17- 49- 54"57
17- 53- 12-83
17. 56- 52-38
18. 6. 31-91
42-17
43-S7
6'39
1-62
27-28
14-60
54-65
12-89
52-46
3I-35
39-27
2-08
57-23
22-82
IO'2O
5 '24
8-32
47^7
27-04
5570
55^9
55-61
55-54
55-60
SS'59
55-43
55-51
55-69
5573
55'63
55-56
55-62
55-60
55-5I
8 Ursae Minoris . . .
24 Ursre Minoris
oLyrae
2 Aquilae
29Sagittarii
S 1 Lyrse
1 Serpentis
e Aquilfe
jrSagittarii
9-489
10-764
13-500
h m s
1 8. 6. 30-65
1 8. 10. 9-90
18. 32. 22-96
18.35.27-73
18. 42. 21 -79
18. 45. 11-58
18. 49. 57-04
18. 53. 49-22
19. 2. 26-6l
10-56
23-12
27-88
21-94
11-74
57-I9
49-37
26-76
27-04
671
18-98
23^4
17-69
7-43
52-90
45'"
22-59
56-I5
55-86
5576
5575
55-69
557i
5574
5573
5572
55-66
55-67
557
5578
1892 June 18. Observer H T. Transit E.
5 Libra ] E
3 Booti- I E
13-420
14. 54. 14-26
14. 56. 55-45
55-50
1374
5472
5937
59-22
59'53
Grootubridge 2283 1 E I 5! 11-569 15. II. 37-38 35-62 i 34-83 ; 59-21
1892 June 23. Observer H T. Transit E.
Groombridge 2283 E
Groombridge 2283
ri Coronie
7 2 Ursse Minoris
f 3 Libra
a Coronse
a Serpentis
ft Serpentis
6 Librse
Groombridge 750 S.P
Groombridge 750 S.P
a 1 Coronoe
f Ophiuchi
f Herculis
49 Hereulis
e Ursse Minoris
T; Ophiuchi
12-464
12-302
13-420
13-851
6-989
13-420
I4-I53
13-420
15. 12. 23-001 26'68
15. 12.
15. 18.
15. 20.
15. 24.
15. 30.
I 5 . 3 8.
15.41.
15. 47.
1 6. 2.
22-64
40-17
51-29
30-30
2-28
52-26
7-59
36-15
31-65
16. 2. 30-81
1 6. 10. 33-46
16. 19. 2-28
16. 37- 8-33
16.47. 5-23
16. 57. 4-23
17. 4. 672
26-32
40-04
5I-45
30-02
2-14
52-06
29-61
2877
33'44
2-08
8-25
5-I5
5-21
6-54
32-55
46-52
58-38
36-50
8-80
5871
14-05
42-45
35'54
35-54
40-13
8-60
I4-97
1 1 -80
11-28
5-87
6-23
6-48
6-93
6-48
6-66
6-65
6-64
6-58
5'93
677
6-69
6-52
6-72
6-65
6-07
6-59
6-64
6 : 6 4
6-Si
6-79
6-78
6-71
6-80
6-62
6-80
672
6-65
( Draconis.
8 Herculis ..
Serpentis
/3 Ophiuchi
B.A.C. 6030
B.A.C. 6049....
B.A.C. 6069
v Ophiuchi
96 Herculis
8 Ursse Minoris..
8 Ursae Minoris.
r\ Serpentis
1 Aquilse
Lyrae
2 Aquilae
1 Lyrse
Cephei 51 S.P. ..
13-420
13-420
15-729
13-996
13-420
12-620
8. 24-99
10. 31-22
17. 35. 16-38
17-38. 3-87
17.44. 175
17. 46. 59-21
17, 50. 43-84
17-53- 0-55
17. 57.41-41
18. 7. 17-07
18. 7. 16-88
18. 15. 38-72
18. 29. 15-22
l8. 33. I2'II
18. 36. 17-15
1 8. 46. 0-69
1 8. 49. 24-50
25-28
3-66
1-58
58-95
43-62
0-29
41-24
I9-54
I9-35
38-58
15-06
I2'I2
I6'99
0-67
21-15
3I-90
37-73
22-91
10-27
8-38
5-47
50-27
6-99
48-05
26-64
26-64
4534
2I-89
19-08
2376
6-62
6-56
6-80
6-61
6-80
6-52
6-65
6-70
6-81
7-10
7-29
676
6-83
6-96
6-77
6-87
6-30
6-61
6-83
6-63
6-82
6-53
6-66
671
681
674
6-80
6'93
673
6-82
1892 June 24. Observer H T. Transit E.
C Herculis I W
W
W
W
w
w
K Ophiuchi .
e Ursse Minoris.
a Herculis
8 Herculis
ir Herculis
cr Ophiuuhi.
I3-430
> )
12-676
13-43
I3-430
16. 37. 6-82
16. 52. 27-42
16. 57. 2-56
'7- 9-37-3I
17. 10. 29-67
17. ii. 11-13
17.21. 3-22
6-82
27-37
3-25
37-27
2965
11-15
3-17
14-96
35'33
1 1 -21
45-38
3773
I9-33
"'37
8-14
7-96
7-96
8-n
8-08
8-18
8-20
8-23
8-03
8 : 'i6
8'! 3
8-23
8-24
8 Draconis....
fa Ophiuchi ..
o Serpeutis ...
Ophiuchi ...
ft. Herculis ....
B.A.C. 6030 .
13-430
17- 27. 53-59
17. 31. 52-51
17- 35- 1475
17. 38. 2-19
17.42. 7-73
17. 44. 0-24
53-68
52-43
14-66
2-14
7-72
0-22
2-O9
O'6l
22-91
10-28
ISW
8- 3 8
8-41
8-18
8-25
8-14
8-25
8-16
8-2i
8-28
8-16
8-27
8-18
1892 June 26. Observer H T. Transit E.
S Bobtis E 9
Groombridge 2283 E 10
Groombridge 2283
ri Coronfc
7 2 Ursce Minoris....
i Draconis
f Libra
37 Librae
y Libra
42 Librae
K Librae
T; Librae
(8 Serpentis .
i Serpentis..
\ Librae
48 Librse . . . .
8 Scorpii
51 Libra ....
I3-43
14-096
10-698
13-430
15. 10. 59-28
15. 12. 13-59
15. 12.
15. 18.
15. 20.
15. 22.
15. 24.
15. 28.
15. 29.
15- 33-
15-35-
IS- 37-
14-72
35-I4
45-86
22 '8O
25-50
7-I4
1979
44-68
34-I9
50-64
15.41. 2-83
15. 45. 16-67
15. 46. 54-64
15.51. 59-14
IS- 53-47-63
IS. 58. 16-45
59-3
18-82
I9-95
3VI5
46-40
23-04
25-29
6-96
I9-59
44-44
33W
50-44
276
16-56
54H3
58-95
47-4I
I6-27
10-86
46-49
58-24
36-49
18-25
30-88
1-59
14-04
2774
5-72
10-26
5878
27-59
11-56
12-35
1 1 '22
H'34
11-84
11-38
1 1 '20
II'29
11-29
II-23
11-28
11-15
11-28
11-18
11-29
11-31
n'37
11-32
11-74
11-51
"37
11-45
11-45
11-39
n-43
11-30
"43
11-32
ii-43
11-45
11-50
11-45
Groombridge 750 S.P E
Groombridge 750 S.P
8 Ophiuchi
o- 1 Coronae
e Ophiuchi
f Ophiuchi
B.A.C. 5579
f Herculis
e Ursae Minoris...
Ophiuchi
w Herculis
B.A.C. 5866
B.A.C. 6069
v Ophiuchi
67 Ophiuchi
96 Herculis
24 Ursae Miuoris .
10
14797
15-998
13-43
16-417
13-43
12-546
1 6. 2. 28-23
16. 2. 27-66
16. 8. 31-99
16. 10. 28-75
16. 12. 27-24
16. 31. 3-60
16. 35. 10-63
I6.37- 3'53
16. 56.
17. 14.
17. 16.
17. 18.
17. 50.
17. 52.
17- 55-
17- 57-
18. 10.
58-83
23-04
27-86
5-68
39-05
55-85
5'3
36-86
50-52
24-90
31-84
2877
27-08
3-42
10-42
60-30
22-82
27-87
5-46
38-92
55-68
4-91
36-82
54-59
36-22
36-22
43-00
40-12
38-25
14-69
21-63
14-96
1 1 -06
34-12
39-28
16-71
50-36
7-02
16-16
48-07
5-92
1075
11-32
iri6
"35
11-17
11-27
11-21
II-42
10-76
II-3O
If4I
11-25
11-44
11-34
11-25
11-25
H'33
11-28
11-47
1I-29
n-37
11-30
11-51
n-35
11-46
11-29
11-45
ii-35
11-26
11-25
K Librae
B Serpentis .
fl Librse
I3-430
1892 June 27. Observer H T. Transit E.
'5- 35- 41 "36
15.41. 9-81
15- 47- 38-39
41*03
9-68
38-08
45-2S
14-04
42-45
4-22
4-36
4-37
4-31
4-45
48 Librse .
8 Scorpii .
5 1 Librae .
I3-430
I5-52. 6-32
15- 53- 5479
15. 58. 23-62
6-02 ' 10-26
54-44 ' 5S-78
23-34! 27-59
4-24
434
4-25
4-42
4'33
164
TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREEXWICH, MADE IN 1892.
Star's Name.
Position.
No. of Wires.
E.A.
Micrometer.
Observed
Transit.
Corrected
Transit.
1
*
gg*
.28.2
O C.IC
a
Clock
Apparently
Slow at i8 h
Sidereal.
Star's Name.
1
No. of Wires.
K.A.
Micrometer.
Observed
Transit.
Corrected
Transit.
Tabular
Apparent
R.A.
Clock
Apparently
Slow.
Clock
Apparently
Slow at is'
Sidereal.
Groombridge 750 S.P
Groombridge 750 S.P.
E
W
W
W
W
W
W
W
W
W
E
E
E
E
E
E
E
W
W
W
E
E
E
E
E
E
E
E
K
W
W
W
w
w
w
w
w
w
w
w
w
w
E
E
E
E
E
E
E
E
E
W
W
w
w
w
w
w
w
E
E
E
E
IO
IO
9
7
9
9
9
9
9
5
IO
9
9
5
7
4
9
9
9
9
9
9
I
9
9
9
9
IO
10
8
9
9
9
I
9
9
9
9
9
10
9
9
9
9
9
9
9
9
9
9
9
7
9
3
9
9
9
9
9
9
8
r
14-115
I7-554
I3-430
II
))
II
II
1)
13-830
I3-430
>t
1 I
I3-430
II
||
13-430
1)
1 t
tt
I I '968
1 3 '430
i
t
I3'430
10*643
10761
^3'43O
H
M
1)
I3-430
)l
I3-IOO
I3-430
13 '430
II
ft
tt
1892
h m 3
16. 2. 36-23
16. 2. 35-30
16. 12. 34-29
16. 14. 6-43
16. 17.45-15
l6. 22. 30-07
16.24.55-50
16. 31. 1076
i6.35- 1773
16. 37. 10-66
16.57. 4-55
17. 4. 9-24
17. 8.27-20
17. 9.41-14
17. 10.33-44
17. n. 14-81
17. 14. 30-24
16. 25. 24-19
16. 31. 9-08
16. 35. i6'ii
'5- 35- 38-47
15- 37- 54-83
I5-38.5I-77
15.41. 6-99
15. 45. 20-70
15.46.35-56
15- 52. 3-49
15. 54. 10-94
16- 2. 33-73
16- 2. 33-77
16. 8. 36-23
16. 10. 33-12
16.12.31-53
16. 22. 27-26
16. 24. 5277
16. 29. 5-12
16. 31. 8-03
16. 35. 14-98
16.37. 7-94
15. 54. IO'2O
15. 58. 19-85
16. 2. 32-79
16. 2. 33-08
16. 8. 35-08
16. 10. 31-88
16. 12. 30-41
16. 17. 41-15
16. 19. 0-79
16. 20. 40-10
16. 22. 26-11
16. 25. 21-94
16.37. 675
16.47- 379
16. 50. 37-95
16. 52. 27-37
16. 57. 0-44
17- 4- 5'34
17. 8.23-16
17- 8.37-37
15. 50. 4-07
15. 54. 9-22
15. 58. 18-97
15. 59. 2-86
June
8
34^3
6-06
44-8I
30-4I
55-18
10-47
I7-40
IO-63
6-56
8-93
27-69
41-00
33-37
14-82
29-90
189
23-86
8-65
15-61
189$
38-08
54-47
51-54
6-82
20-46
35-19
3-13
10-57
29-50
29-54
35-93
33-08
31-22
27-60
52-39
4-67
7-69
14-59
7-88
189
9-87
19-55
28-66
28-85
34'84
31-88
30-16
40-81
0-42
39-77
26-51
2173
673
37-6i
27-20
2-60
5-01
23-68
37-23
189
377
8-91
1 8 -68
2-53
27.
8
36-42
36-42
38-25
10-27
49-02
3473
59-32
14-69
21-64
14-96
10-99
13-15
31-84
45-40
37-67
I9-33
34-I3
2 Jui
29-91
1470
21-64
! Jun
45-24
1-58
58-69
14-02
2773
42-44
10-25
17-87
36-97
36-97
43-00
40-09
38-25
34-66
59-33
11-76
1470
21-64
I4-95
2 Jul
17-87
27-58
37-16
37-16
42-99
40-09
38-25
49-02
8-61
47-89
29-90
14-94
11-81
35-35
10-63
I3-I7
3176
45-40
2 Jul
12-88
17-87
27-58
11-38
-Obse
s
4-08
5-01
4-22
4-21
4-21
4-32
4-14
4-22
4-24
4-33
4'43
4-22
4-I5
4-40
4'3
4-23
ie 29.
6-05
6-05
6-03
e 30.
7-16
7-11
7-15
7-20
7-27
7-25
7-12
7-30
7-47
7-43
7-07
7-01
7-03
7-06
6-94
7-09
7-01
7-05
7-07
y i-
8-00
8-03
8-50
8-15
8-21
8-09
8-21
8-19
8-12
8-13
8-17
8-21
8-16
7-81
8-15
8-03
8-16
8-08
8-17
y 2.
9-11
8-96
8-90
8-85
rver H
8
4-28
4'2O
4-30
4*38
4*26
4-43
4-54
Obse
6-II
6-09
Obsei
7-26
7-21
7-25
7-30
7-36
7-34
7-21
7-39
7-15
7-09
7-10
7-01
7-15
7-07
7-11
7-13
Observ
8-08
8-n
8-28
8-16
8-28
8-26
8-19
8"-2 3
8-27
8-21
7-86
8-20
8-20
8-20
Obsen
9-19
9'4
8-98
8-93
T. Transit E.c
wit
E
E
E
E
E
E
E
E
W
W
W
W
W
W
W
W
W
E
w
w
E.
E
E
E
E
E
E
E
E
E
W
W
W
W
VV
W
W
W
W
E
E
E
E
E
E
E
E
E
E
W
W
W
w
w
w
w
E
E
E
E
W
W
ini
g
9
9
I
7
9
IO
IO
9
9
9
9
9
9
9
IO
9
20
9
9
20
7
9
6
5
9
9
9
9
9
5
9
9
9
9
40
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
20
IO
IO
50
IO
IO
9
led.
r
13-430
tt
11
li
tt
tt
9-944
13-909
13-43
il
n
12-758
13-430
15-955
13-430
13-985
13-430
9 t
I3-430
II
) t
tt
13-430
1
t
t
t
tt
I3'430
It
It
tt
tt
14-519
16-930
I5-363
I3-465
15-118
I574I
13-430
h m a
17. 16. 35-10
17-29-53-15
17. 31. 56-60
17.49. 32-21
17. 50. 46-32
17- 53- 3-05
17.57-43-88
18. 7. 16-17
18. 7- 17-62
18. 15.41-30
1 8. 1 8. 53-49
1 8. 29. 18-00
18. 33. 14-56
18. 36. 19-83
18. 43. 14-08
18. 46. 3-35
1 8. 49. 3079
16. 37. 8-78
16. 57. 2'22
16. 50. 38-60
16. 52. 28-46
16.57- 1-53
17. 4. 6-50
17. 8. 24-12
17. 10. 30-56
17. ii. 12-09
17. 14. 27-37
17. 16. 32-13
17. 21. 4-56
17. 24.45-19
17. 27. 55-02
17. 29. 50-44
I7.3I-53-80
17. 35. 16-12
17- 38- 3 '42
17. 42. 8-81
18. 7. 13-08
17. 14. 26-21
17. 1 6. 30-96
17.18. 877
17. 19. 40-80
17.21. 3-36
17- 35- 14%
17.36.51-92
17. 38. 2-23
17. 44. 0-30
17.46. 5772
17. 50.42-33
17. 52. 59-08
17.55. 8-28
I7-57-39-94
17- 59- 54-07
1 8. 2. 7-62
18. 7. 12-18
18. 7. 11-54
18. 10. 50-40
1 8. 49. 27-23
16. 2. 32-03
16. 2. 31-31
16. 8. 34-19
3
35-08
53-00
31-88
46-IO
2-78
20-95
22-4O
4I-05
53-14
17-72
I4-59
I9-55
1373
3'33
24-6I
8-72
5-11
38-21
28-25
3-66
6-13
24-60
30-45
12-08
26-97
32-07
4-3
44-76
55-I7
50-24
53-47
15-76
3-17
871
18-36
25-86
30-95
8-42
40-43
3-16
I4-59
51-56
2-04
O'2O
57-44
42-10
5879
8-07
39-84
53^5
7'45
17-46
16-94
2O-I7
28-47
33'93
I
39-28
0-62
36-16
50-36
7-03
48-08
26-I6
26-I6
21-94
19-12
23-82
17-90
27-88
14-95
11-36
10-73
I3-I7
3I-79
37-80
19-32
34-I5
39-28
11-40
5f94
2-07
57-33
0-64
22-96
10-32
15-99
25-88
34-I5
1674
4873
11-40
22-97
59-86
10-32
8-47
677
50-38
7-06
1 6 -20
48-10
2-04
15-86
25-79
2579
5-35
28-10
37-36
37-36
42-99
s
4'20
4-31
4-28
4-28
4-26
4-25
4-30
5-21
376
4'34
4-27
4-22
4-17
3 '27
6-23
7-21
7-10
7-07
7-04
7-19
7'35
7-24
7-21
7-10
7-18
6-90
7-09
7-17
7-20
7-i5
7-28
7-52
8-29
8-32
8-32
8-30
8-24
8-38
8-30
8-28
8-27
8-33
8-28
8-27
8-13
8-26
8-19
8-41
8'33
8-85
878
7-93
8-89
9-51
9-06
8
4^3
433
4-30
4-27
4^5
4'3
4'20
4-5I
4-I4
4-22
6-28
7-26
7-15
7 : o8
7-27
7-21
7-24
7-20
7-19
7-22
7-I7
7-29
8-32
8-35
8-35
8-33
8-27
8-40
8-32
8-29
8-28
8'34
8-29
8-27
8-13
8-26
8-19
8-41
a Ophiuchi
fj. Ophiuchi
Ophiuchi
BAG. 6060
19 Scorpii
B.A.C. 6069
i// Ophiuchi
T] Draconis
Ophiuchi
B.A.C. 5579
Hercuhs
e Ursa; Minoris
21 Sagittarii
T; Ophiuchi
Draeonis
o Herculis
29 Sagittarii .. .
IT HerculH
Cephei 51 S P
Ophiuclii
rver H T. Transit
\ Ophiuchi
COphiuchi
B.A.C. 5579
ver H T. Transit
BAG 5700
K Libra;
j) Libra;
Scrpeutis
6 Serpentis
6 Libra;
48 Libra;
49 Libra;
Groombridge 750 S.P
GroombridgK 750 S.P
<r Ophiuchi.
8 Ophiuchi
cr 1 Corona;
e Ophiuchi
TI Draconis
<f> Ophiuchi
T Scorpii
( Ophiuchi
B.A.C. 5579
Herculis
-er H T. Transit j
49 Libra;
51 Libra;
Groombridge 750 S.P
BAG 5866
Groombridge 750 S.P
b Ophiuchi.
8 Ophiuchi
<T* Corona;
58 Ophiuchi
c Ophiuchi
\f/ Ophiuchi
BAG 6030
p Ophiuchi
BAG 6049
BAG 6069
TI Dracouis
X Ophiuclii
. ( Herculis
67 Ophiuchi
49 Herculis
B.A.C. 5700
K Ophiuchi
t Ursa; Minoris
T) Ophiuchi
o Herculis
Cephei 51 S P
W. B. XV. 910
f er H T. Transit j
51 Libra;
/3 l Seorpii
STAR-TRANSITS OBSERVED AT PARIS AND RESULTING CLOCK ERRORS.
165
Star's Name.
1 Position.
1 No. of Wires. 1
R.A.
Micrometer.
Observed
Transit.
Corrected 1
Transit.
Tabular
Apparent
K.A.
_>
gg
-2S.2
"g*
s
c%
si-Si
3 > S
OO.S3
fga
Star's Name.
Position.
No. of Wires. 1
K.A.
Micrometer.
Observed
Transit.
If
g**
Tabular
Apparent 1
K.A.
Clock
Apparently
Blow.
Clock
Apparently
Slow at iS*
Sidereal.
o- 1 Coronpe
W
W
w
w
w
w
w
E
E
E
E
E
E
E
E
E
W
W
W
W
W
w
w
w
w
w
w
\v
w
w
w
w
E
E
E
E
W
W
W
W
W
W
W
W
W
E
E
E
E
E
E
E
W
W
W
w
w
w
w
w
9
9
9
9
9
8
9
9
20
9
9
9
9
10
IO
9
6
9
8
9
IO
6
9
9
9
8
9
9
5
IO
4
9
9
IO
IO
8
5
9
9
9
9
IO
7
9
6
9
9
9
IO
IO
9
9
9
9
8
9
9
r
13-430
M
it
j>
t)
M
13-430
n
n
14-016
13-430
13-400
14-590
17-253
13-400
ii
n
ii
13-212
13-400
13-430
12-990
13-430
M
14-728
16-279
13-430
I
>
I5'l93
17-421
I3-430
||
II
D
91
13-833
17-937
13-430
189:
h in a
1 6. 10. 30-96
16. 12. 29-50
16. 14. 1-56
16. 17. 40*25
16. 19. o'oo
16. 20. 39-15
16. 22. 25-13
16. 47. 2-63
16. 50. 36-50
16- 52. 26-41
16. 56. 59-19
17. 4. 4-11
17. 9- 36-42
15. 53. 46-92
15. 58. 15-52
16. 2. 3 1 '62
16. 2.31-91
16. 17. 3677
16. 22. 37-I2
16. 40. 4-67
1 6. 43. 0-08
16. 52. 22-95
16. 56. 55-36
17. 8. 18-56
15. 47. 29-22
15.51.57-10
I5-53-45-55
1 6. 8. 29-63
16. 14. 26-39
16. 28. 58-52
16.31. 1-55
'6. 56. 53-73
15-48.43-32
'5- 52- 7-5
15- 53-45-oo
1 6. 2. 29-90
16. 2. 31-22
16. 28. 57-64
16. 31. 0-27
16.37. 0-33
1 6. 40. 276
16.46. 57-44
16. 50. 31-16
16. 52. 21 -02
16. 56. 52-70
16. 56. 52-47
17- 9-3'" 2 3
17. ii. 478
17. 16. 24-89
17.20.57-33
17.29.43-11
16. 2. 25-12
16. 2. 30-94
16. 14. 24-20
16. 17- 33-72
16. 18. 53-39
16. 20. 32-59
l6. 22. 17-85
16. 24. 44-14
1 6. 36. 59-38
I Jul
a
30-92
29-24
I-I9
39-9I
59-64
38-82
25-41
2-48
36-I7
26*23
60-98
3-80
36-26
18
46-59
15-29
24-27
27-40
36-22
36-50
4-06
59-48
22-66
577
19-08
18
28-95
56-S4
45-23
29-45
26-05
58-15
1-32
56-32
18
45-16
7-01
44-55
24-30
2572
57-12
59-91
0-33
2-27
57-28
30-72
20-82
55-61
55-44
31-12
4-89
24-95
57-13
42-98
L{
20-14
26-06
23-82
33-38
53-02
32-27
18-40
43-83
59-44
y *
s
40-08
38-24
10-26
49-02
8-61
47-89
34-62
11-81
4542
35-35
10-54
13-17
45-40
92 J
58-76
27-56
38-32
38-32
49-01
49-23
16-83
1 2 - 2O
3515
IO-I5
3I-65
92 J
42-41
10-23
5875
42-98
39-55
11-75
14-69
1 0-06
92 J
0-03
2f02
58-75
38-86
38-86
11-75
14-69
14-9:
16-83
1 1 -80
45-43
3535
9-96
9-96
45-41
19-29
39-29
11-42
57-35
,92 J
39-12
39-12
39-54
49-01
s-6o
47-88
34-45
59-32
14-90
Obse
s
9-16
9-00
9-07
9-11
8-97
9-07
9-21
9'33
9-25
9-12
9-56
9-37
9-14
uly 6.
12-17
12-27
14-05
10-92
12-79
12-73
12-77
12-72
12-69
12-45
12-57
illy 7.
J3'46
I339
13-52
I3-53
13-50
I3'6o
I337
I3-74
uly 8.
14-87
14-01
14-20
14-56
13-14
14-63
14-78
14-58
14-56
14-52
1471
14-53
14-35
14-52
14-29
14-40
14-34
14-29
14-37
uly 9.
18-98
13-06
15-72
15-63
15-58
15-61
16-05
15-49
15-46
rver H
a
9-23
9-07
9-14
9-18
9-03
9-I3
9-38
9-29
9-16
9'40
9-i7
Obse
12-24
12-34
12-85
1279
12-82
12-76
1273
Obse
13-54
13-47
13-60
13-60
13-57
13-66
13-78
Obse
14-09
14-28
14-69
14-84
14-64
14-61
14-57
1476
14-58
14-32
14-43
14-37
14-32
14-39
Obse
15-79
15-70
15-65
15-67
15-55
15-51
Transit E. con
tin
E
E
E
W
W
W
w
w
w
w
w
w
w
;.
w
w
w
E
E
E
E
E
E
W
W
W
E
E
E
E
E
1
'E
E
E
E
E
E
W
W
W
W
W
W
W
E
E
E
E
E
?.
W
E
E
E
E
E
E
E
E
ue
5
9
9
9
9
9
9
9
9
9
9
9
5
8
8
9
9
8
9
9
8
IO
10
8
7
7
9
9
8
5
9
9
9
9
9
IO
10
6
9
9
9
6
IO
IO
9
9
9
9
IO
7
5
7
9
9
7
9
9
d.
r
I3-430
II
II
I3-430
||
) 1
J 1
I )
II
I3-495
13-400
))
13-410
ii
>
H
14-202
9-960
13-430
13-529
13-430
13-429
13-430
)
13-430
D
M
>l
1 1 "640
IO-936
12-294
I3-430
1)
t*
I3'837
IO*20I
I3'430
t >
II
ii
14-547
18-193
13-430
H
II
1
II
l
t
h IB I
17. II. 10-04
17. 14. 25-36
17. 16. 30-14
17. 27. 5273
17- 38. i'55
17.42. 6-85
17.43-59-5I
17. 45. 19-01
17. 46. 56-97
17.49. 27-44
17. 50.41-45
17. 52- 58-29
l8. 7. I2'I2
17. 14. 21-98
17. 20. 59 - IO
17. 29. 44-78
17. 49. 24-00
17- S 2 - 5474
17.55. 3-88
17- 57- 35-54
17. 59. 49-56
18. 7. 3-01
18. 7. 6-28
17- 3-59-98
18. 7- 376
18.33. 5-40
18. 45. 54-31
18. 49. 20-93
18. 54. 32-21
19. o. 15-63
17.31.46-69
17- 35- 9-05
17. 37. 56-26
17. 49. 22-40
17. 50. 36-37
1 8. 7. 4-45
1 8. 7. 2-04
18. 10. 37-74
18. 15. 31-09
1 8. 1 8. 43-36
18. 33. 4-69
1 8. 36. 9-49
1 8. 49. 24-92
18. 49. 17-40
1 9. 1 1 . 8 - 1 1
19. 15.21-43
19- I9-37-58
19- 30. 53-63
1 6. 56. 51-65
16. 56. 52-51
17. 8. 15-95
17.11. 3-99
17. 14. 19-55
17. 16. 24-05
17. 18. 2-14
17. 20. 56-46
I?' 31- 45- 8 3
3
10-01
25-02
30-08
52-86
1-33
6-77
59-38
18-67
56-68
27-10
41-21
58-00
16-43
21 '42
58-76
44-52
23-67
54^9
373
3535
49-41
12-69
1 2 -O2
59-7I
9'94
5-56
54-42
12-45
32-17
I5-57
46-40
872
56-07
22-02
36-14
11-68
9-15
45-84
30-83
42-95
4-81
9-18
1578
8-10
772
21-07
37-44
53^4
54^3
55-25
16-67
4-12
19-22
24-13
i -So
56-31
45-59
8
I9-3I
34-15
39-27
2-05
10-33
I5-99
8-48
2777
577
36-20
50-38
7-07
2570
34"i6
11-41
57'34
36-23
7-10
16-31
48-12
2-07
25-I3
25-13
13-19
24-93
19-17
7-65
2879
45-39
28-92
0-68
23-00
10-35
36-24
50-41
24-73
2473
4-18
45-48
57-52
19-18
23-94
29-00
29-00
21-44
34-99
51-43
7-22
9-84
9-84
31-58
19-28
34-I7
39-28
1677
11-42
0-68
a
9-30
9-I3
9-I9
9-19
9-00
9'22
9'io
9-10
9-09
9-10
9-I7
9-07
9-27
1274
12-65
12-82
12-56
I2'6l
12-58
12-57
12-66
12-44
13-"
13-48
I4-99
13-61
13-23
16-34
13-22
I3-35
14-28
14-28
14-28
14-22
14-27
13-05
I5-58
'8-34
14-65
H'57
I4-37
14-76
13-22
Jb'9O
13-72
13-92
I3-99
13-88
15-51
I4-59
14-91
15-16
I4-95
I5-I5
14-97
15-11
15-09
a
9-33
9-16
9'22
9-01
9-23
9-11
9-11
9-10
9-11
9-18
9-08
12-77
12-67
12-84
12-57
12-62
12-58
12-57
12-66
13-52
I3-59
13-20
13-18
13-31
14-30
14-30
14-29
14-23
14-28
14-64
14-56
I4-35
474
13-67
13-87
I3-94
13-82
15-19
14-98
15-18
15-00
15-14
IS'"
( Ophiuchi
19 Scorpii
^ Ophiuchi
p Ophiuchi
X Ophiuchi
TJ Draconis
49 Herculis
B.A.C. 6030
BAG 6034
B.A.C. 5700
B A C 6049
K Ophiuchi
B A C 6063
c UrssB Minoris
BAG 6069 .
n Ophiuchi
a Herculis
5 Scorpii
rver H. Transit L
51 Libre
Groombridge 750 S.P
Groombridge 750 S.P
\ji Ophiuchi
B.A.C. 6060
25 Scorpii
18 Ophiuchi
K Ophiuchi
( Ursfe Minoris
f Draconis
8 Libra 1
rver H. Transit E
48 Librae ;
S Ophiuchi
a Scorpii
T Scorpii
Oephei 51 S P
f Opliiuchi
Ursre Minoris
Urs;e Minoris
rver H. Transit E
IT Scorpii
S Scorpii
Gi'oombridge 750 S.P
HAG 6060
Groombridge 750 S.P
BAA 6069
5 Ursie Minoris
Ophiuchi
Herculis
25 Scorpii
49 H erculis
B.A.C. 5700
K Ophiuclii
c Ursiu Minoris
Cephei 51 S P
t Ursre Minuris
Oephei 51 S P
a Herculis
ir Herculis
w H t-rcu 1 i s
CT Ophiuclii
a Opliiuchi
rver H. Transit 1
Groombridge 7508. P
Groombridge 750 S. P
a* Scorpii
y Ophiuchi
p Opliiuchi
X Ophiuchi
7; Draconis
B A C 5866
^ Hurculis
166
TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1892.
Star's Name.
d
3
of Wires.
R.A.
crometer.
Observed
Transit.
11
ll
H a
ill
*s> .
llil
Star's Name.
osition.
of Wires. 1
K..A.
srometer.
Observed
Transit.
-N
4J Q
sg .
alh
3 &*
|||
= %*'
ills
o
fc
S
"'
1
<*<*
M
o
fc
S
H
^<i
I
-.2 CB
1892 July 9. Observer H. Transit E. continued.
r
h m s
8
8
S
s
h m s
8
s
8
s
o Serpentis
F
1 3 "43O
17 ". 8'26
7"QQ
27 'OO
i --Toi
I "-t'Cy-l
W
13 43O
1 8. 1 8. 42*44
42* IO
WW
IS '42
Ophiuchi
F,
o
17. 37. CC-2Q
io"?t;
I ^'2 1
I5'22
i Aquilse
w
c
1 8. 29. 6-87
6-62
22 'O6
I -I '44
I --i'42
3 Sagittarii
F,
"
17. 4O. 33-84
7V44
48*^2
u-ss
I4'8o
a Lyne
w
"
l8. 33. 3'42
r<;6
19-18
I<*62
i -\'6o
BAG. 6030
F,
g
17. 43. 1I3-33
C7/2Q
8 '44
I-? 'I 1 ?
IC'IO
2 Aquilae
w
'
18. 36. 8-82
8-i;6
I S'^Q
T C--37
F
2O
1 1*1132
l8 7 2 '80
9*43
I H'lO
S 1 Cveni
w
'
19 26. 8-90
8'Q2
2/1-14
I -s'22
I ^"17
5 Urae Minoris...
W
10
11-161
18. 7- i-86
8-28
24*1-3
I6-2-;
\ Ursoa Minoris ...
E
10
I3-266
IQ. 31. 28-00
10-16
2O* I I
o Serpentis
( Serpentis
( Ophiuchi
f Herculis
49 Herculis
it Ophiuchi
( Ursse Minoris.
f Draconis
J Herculis
Ophiuchi
B.A.C. 5866
a Ophiuchi
3 Draconis
o Serpentis
Ophiuchi
8 Urste Minoris .
5 Ursse Minoris.
Groom bridge 750 S.P.
Groombridge 750 S.P.
49 Herculis
K Ophiuchi
H Herculis
B.A.C. 6049
v Ophiuchi
y Draconis
S Ursse Minoris
5 Ursse Minoris .
a Lyra
29 Sagittarii ....
1 Lyra
13-650
11-380
13-650
E
IO
W
6
W
8
W
9
w
9
w
8
w
9
w
4
w
IO
E
IO
E
7
E
9
E
9
13-296
11-580
12-807
20-260
13-650
13-723
16-335
13-650
1892 July 12. Observer H. Transit E.
15. 38. 40-46
40-18
15.45. 9-68
9H9
1 6. 30. 57-00
56-58
1 6. 36. 56-60
56-56
16. 46. 53-97
53-77
1 6. 52. 17-43
17-18
16. 56. 49-41
5 2 '35
17. 8. 12-65
I3'34
17. 10. 19-54
I9-43
17. 14. 16-51
15-99
17. 17-59-16
17. 20. 53-54
53-25
17. 27. 43-32
43-59
I7.35. 5-I9
475
17- 37. 52-36
18. 6.58-44
52-07
5-61
18. 6.57-05
5-24
58-62
27-67
14-68
14-87
11-78
35-33
9-49
31-50
3777
34-I7
16-77
11-42
1-96
23-00
10-35
18-44
18-18
18-10
18-31
18-01
18-15
17-14
18-16
18-34
18-18
18-14
18-17
18-37
18-25
18-28
18-34
18-71
18-53
18-26
18-16
18-36
18-06
18-19
18-37
18-21
18-17
18-19
18-27
18-29
a Lyrse
29 Sagittarii
fl' Lyra
Cephei 518.?..,
( Aquilie
IT Sagittarii
b Aquilie
fl'Cygni
\ Ursfe Minoris.
Ursrc Minoris.
Aquiloe
B.A.C. 7014.
p Capricorn!..
69 Aquilae....
1892 July 13. Observer H. Transit E.
1 6. 2. 25-08
20-14
40-07
16. 2. 27-14
21-46
40-07
16. 46. 52-96
5279
11-78
16. 52. 16-53
16-31
35 '33
17.41. 56-95
56-89
I5-99
17.46. 47-15
46-78
5-82
17. 52. 48-31
47-95
7-12
17- 53- 49-02
49-28
8-30
18. 6. 57-09
4 '33
2377
18. 6. 58-13
4'35
23-77
1 8. 32. 59-98
59-95
19-18
1 8. 42. 59-65
59-13
1 8 -08
18. 45. 48-59
48-51
7-68
19-93
18-61
18-99
19-02
19-10
19-04
19-17
19-02
19-44
19-42
19-23
18-95
19-17
19-03
19-06
19-11
19-05
19-17
19-21
18-93
19-15
Cephei 51 S.P. .
( Aquilie
it Sagittarii
d Sagittarii
v Sagittarii
b Aquilfe
A Ursfe Minoris.
X Ursue Miuoris.
y Aquilse
a Aquiloe
7) Aquilse
j8 Aquilse
(3 2 Capricorn!
B.A.C. 7014
1892 July 15. Observer H. Transit E.
\ Ophiuchi
F,
o
13-650
9
TS
13-642
a Heroulis
E
F,
| Ophiuchi
F,
Q
/} Ophiuchi ..*.
B
o
5 Ursa; Minoris
F,
13-207
W
7,0
10-348
r] Serpentis
W
o
13-650
21 Saitarii
W
f)
W
9
13-600
W
80
B Sagittaa
W
f>
13-600
W
o
a Aquilse
W
Groombridge 1119 S.P
Groombridge 1119 S.P
W
E
10
IO
14-350
11-661
y Draconis..
96 Herculis .
13-540
16. 25. 9-79
1 6. 30. 54-65
16. 56. 48-84
17. 9. 25-03
17. 10. 17-35
17. 14. 14-28
'7-37- 50-13
18. 7. 2-23
18. 6.53-95
18. 15. 24-58
18. 18. 36-87
19. 19. 30-85
'9- 3L3I-97
19- 35- 53-43
19. 40. 49-05
19. 45. 12-49
19. 48. 23-87
19. 48. 10-57
17. 53. 44-29
17. 57. 24-69
24-71
29-86
14-67
9-14
4539
17-06 37-76
13-80
49-78
1-45
i'8 3
2471
36-94
30-86
47-41
12-48
8-45
2-57
34-17
10-35
23-41
23-41
45-51
57-55
5 I- 49
8-68
14-01
27-69
27-69
20-43
20-43
2070
2068
20-70
20-37
20-57
21-96
21-58
20-80
20 -6 1
20-63
21-27
20-55
20-68
20'6O
19-24
25-12
20-48
20-48
20-71
20-73
20-40
20-58
20-79
20 -60
20-59
20-50
20-62
20-54
a 1 Capricorn!
a 2 Capricorni
# 2 Capricorn!
B.A.C. 7014
p Capricorn!
f Delphini
75 Di-aeonis
i Cygni
15 Delphini
20 Capricorn!
T) Capricorn!
27 Capricorni
CCygni
Groombridge 3548 .
Groombridge 3548 .
y Capricorni
c Pegasi
5 Capricorn!
1892 July 18. Observer H. Transit E.
13-650
18. 33- 0'59
071
Q
H
18. 43. 0-20
5975
9
18. 45. 49-37
49-42
IO
"4-155
18.49. 21-45
10-84
9
13-650
19. o. 10-65
10-50
Q
ii
19- 3- 5-oS
4'59
9
19- 19- 3332
33-I5
9
,,
19. 26. 5-65
5-64
8
13-122
19. 31. 21-30
48-92
IO
15-681
19. 31. 2O'O2
49-12
9
13-650
19. 48. 44-50
44-22
9
13-650
20. 17- 33-55
3332
9
j
2O. 22. 26-50
26-07
7
i )
20. 23. 44-55
44-25
19-18
18-07
7-67
29-80
28-95
23-02
51-46
24-16
9-29
9-29
2-68
51-80
44 4 53
2'53
E
IO
13737
E
9
13-650
E
9
J)
E
9
)1
E
9
E
9
1)
E
IO
I3-45I
W
IO
12-152
W
9
13-650
W
9
>
W
7
W
9
I
W
9
I
W
9
]
18. 49. 19-34
19. o. lO'oi
19- 3- 4'45
19. n. 3-10
19. 15. 16-59
19. 19. 32-66
19. 31. 28-75
19.31.25-24
19. 40. 50-65
19. 45. 14-03
19. 46-41-59
19. 49. 43-68
20. 14. 40-11
20. 17. 32-78
11-14
976
3-92
2'59
l6'I2
32-40
49-78
49-61
50-44
13-80
41-35
43-44
39-70
32-53
29-96
28-96
23-03
21-49
35-04
51-47
9-07
9-07
9-71
33-06
0-50
2-70
59-07
51-81
E
9
E
4
E
9
E
9
E
9
E
9
E
IO
E
9
E
E
g
E
6
E
9
E
8
E
IO
W
IO
W
9
W
9
W
8
I3*6OO
20. II. 22-13
21-90
42-15
,,
20. II. 46-33
46 - IO
6-22
)
20. 14. 39-04
38-80
59-10
20. 17. 31-50
3 I- 34
5I-84
M
2O. 22. 24-62
24-36
44'58
)1
2O. 27. 45-16
45-02
5;36
13-881
20. 34. 44-92
45-72
13-600
20. 41. 32-07
32-02
52-61
M
20. 44. 10-88
10-75
31-10
I)
20. 53. 10-50
10-24
30-39
1)
20. 57. 58-02
57-75
18-01
,,
21. 3. S'20
4-92
25-05
) >
21. 8. 1-87
1-81
22-43
11-680
21. 20. 56-47
58-78
16-77
10-737
21. 20. 49-74
54-23
16-77
13-600
21. 33.48-14
48-03
8-85
t>
21. 38.34-19
34-I9
54-89
1 1
21. 40. 46-51
46-40
18-47
18-32
18-25
18-96
18-45
18-43
18-31
18-52
20-37
20-17
18-46
18-48
18-46
18-28
18-82
19-20
19-11
18-90
18-92
19-07
19-29
19-46
19-27
19-26
19-15
19-26
19-37
19-28
20-25
20-12
20-30
2O-5O
20-22
20-34
19-76
20-59
20-35
20-15
2O-26
20-13
2O-62
I7-99
22-54
20-82
20-70
20-7I
44-57
8-25
48-13
23-68
23-58
23-58
S Urste Minoris .
16-067
18. 6. 51-23
59-20
22-78
STAR-TRANSITS OBSERVED AT PARIS AND RESULTING CLOCK ERRORS.
1C7
Star's Name.
Observed
Transit.
5J
II
11"
H^
ill
og.cc
Star's Name.
< ~
Observed
Transit.
w
II
1892 July 21. Observer H. Transit E.
X Ursre Minoris
Groombridge 1119 S.P
a Capricorni
ff- Capricorni
B.A.C. 7014
p Capricorni
eDelpliiiii
jSDelphini
aCygni
19 Capricorni
CCygni
<rCygni
Groombridge 3548
W
W
W
W
W
W
W
W
W
W
W
; W
1 1 -927
128
450
14-197
19.31.
19. 48.
20. 12.
2O. 14.
20. 17.
2O. 22.
20. 27.
2O. 32.
20. 37.
20. 48.
21. 7.
21. 12.
21. 2O.
14-27
20-44
46-08
32-70
25 4 3S
I8-2I
38-91
478
20-41
1774
55-66
45-72
48-06
29-57
6-27
45-96
32-58
25-34
18-09
38-93
4-81
20-64
17-62
5578
45-90
52-64
6-50
29-43
12-32
59-18
51-91
44-67
5'44
3'-24
47-23
44-22
22-52
12-58
17-32
23-16
26-36
26-60
26-57
26-58
26-51
26-43
26-59
26-60
2674
26-68
24-68
26-25
26-48
26-45
26-46
26-38
26-30
26-46
26-45
26-58
26-51
Groombridge 3548 .,
c 1 Capricorni
H Capricorni
i Pegasi
6 Pegasi
Bradley 1399 S. P.
T; Aquarii
t Pegasi ,
TI Pegasi
r 2 Aquarii
74 Aquarii
J Aquarii
17-326
13-048
I3-450
21. 20.
21. 38.
21. 47.
22. I.
22. 4.
22. 13.
22. 29.
22. 35.
22. 37-
22. 43.
22. 47.
22. 48.
48-47
5I-I4
0-88
34-55
21-13
2534
24-22
40-08
3 I- 73
28-66
23-61
31-22
52-03
51-01
073
34-57
21-07
2178
24-13
40-04
3179
28-51
23-46
31-05
17-32
17-18
26-90
0-98
47-16
49-03
50-44
6-47
58-24
54-64
49-66
57-28
25-29
26-17
26-17
26-41
26-09
27-25
26-31
26-43
26-45
26-13
26-20
26-23
25-98
25-98
26-20
25-88
26-09
26-20
26-21
25-89
25-96
25-99
1892 July 22. Observer H. Transit E.
( Draconis
| Ophiuchi
Serpentis
Serpeutis
/8 Ophiuchi
fj. Herculis
B.A.C. 6030
B.A.U. 6069 ....
v Ophiuchi
5 Ursie Minoris .
5 Ursre Minoris .
21 Sagittarii
1 Aquilae
o Lyra;
29 Sagittarii
Cephei 51 S.P. .
Cephei 51 S.P. .
K Sagittarii
20 Aquilse
b Aquilee...
a VulpeculsE
I3-450
16-409
18-125
13-450
15-215
I5-395
I3-450
I3-450
17. 8. 2-74
17. 14. 6-68
17. 30. 58-88
17- 34. 55-39
17. 37.42-64
17. 41. 48-02
17. 43. 40-65
17. 50. 22-73
17. 52. 39-58
1 8. 6. 48-44
18. 6. 50-70
18. 18. 30-56
18. 28. 54-76
18.32. 51-17
18. 42. 51-17
1 8. 49. 6-87
1 8. 49. 12-83
!9- 2. 55-34
19- 6. 23-71
19. 19-2378
19. 23. 47-08
3-38
6-47
58-71
48-10
40-67
22-64
39-44
54-00
30-28
54-56
51-25
50-89
1-09
5-81
55-13
23-58
2376
47-I3
31-18
34-15
26-43
23-00
10-33
iS'95
8-47
50-43
7-12
21-70
21-70
57-57
22-11
I9-I5
l8-I 3
32-01
32-OI
23-10
5I-67
5I-53
14-92
27-80
27-63
27-72
2777
2776
27-85
27-80
2779
27-68
2770
26-46
27-29
27-55
27-90
27-24
30-92
26-2O
27-97
28-09
2777
2779
27-68
2775
2779
27-75
27-87
27-81
27-80
27-68
27-27
27-53
27-87
27-20
27-91
28-03
27-69
2771
A. Ursse Minoris W
X Ursfe Minoris
Groombridge 1119 S.P
ju Aquarii
19 Capricorni
16 Delphini
8 Capricorni
y Equulei
CCygni
a Equulei
Groombridge 3548 .
Groombridge 3548 .
7 Capricorn!
c 1 Capricorni
8 Capricorni
a Aquarii
i Pegasi
8 Pegasi
Bradley 13998. P..
Bradley 1399 S.P. .
13-887
15-000
12-946
13-45
13-421
9-537
I3-450
10-727
5-602
19.31.17-42
19. 31. 21-55
19.48. I5-77
20. 46. 24-69
20. 48. 17-01
20. 50. 4'OI
20. 59. 27-70
21. 4. 39-91
21. 7. 54-64
21. IO. O'l8
21. 20. 45-29
21. 2O. 44-26
21. 33. 41-26
21. 38. 49-45
21.40. 39-64
21. 59. 48-57
22. I. 33-09
22. 4. 19-41
22. 13. 24-43
22. 13. 25-32
36-76
O'SS
24-49
1674
3'93
27-44
39-81
54-66
0-06
49-80
49-79
41-07
4931
39-46
48-47
33-15
I9-35
20-04
21-59
5-92
29-95
52-19
55-17
7-58
22-53
2776
I7'35
I7-35
9-00
17-20
7-26
16-38
i-oo
47-18
48-98
48-98
29-93
29-16
29-40
27-70
27-49
27-66
27-73
27-77
27-87
27-70
27-55
27-56
27-93
27-89
27-80
27-91
27-85
27-83
32-94
27-39
27-54
27-33
27-50
27-56
27-59
27-69
27-52
27-72
27-68
27-59
27-69
27-63
27-60
168
TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1892.
XIII. MEAN CLOCK ERROR.
Forming now the means of the eighth column in the preceding pages for each group of clock stars observed
between reversals of the instrument we get the results shown in the tables on pages 169 to 172. The first five
columns require no explanation. In the sixth column the results in the fourth and fifth columns are corrected for
systematic difference between the two positions "W and E. To obtain this correction the various groups were all
reduced to 18 h sidereal with clock rates generally agreeing with those on page 173. The means of the results W and
E were then taken, weighting according to the number of stars in each group and the differences of these means formed
for each day. These differences are given below ; and assigning weights to these by the formula m , where m and n
are the number of stars observed W and E respectively on each day we find the following differences :
Clock Slow W. Clock Slow E.
Tia+o
Transit D.
Transit E.
1/BXBb
W E.
Weight.
W E.
Weight.
June 7
8
o-oi
3
s
8
-0-17
6
+ 0-27
"s
9
O'O2
ii
+ 0-15
13
ii
...
+ 0-24
10
12
...
...
+ 0-18
5
13
0-08
8
+ O'I2
ii
*$
...
+ 0'I2
9
+ 0-175
56
June 20
0-13
10
23
0-12
13
0-04
12
*4
0-14
8
0-07
5
26
0-04
IS
0-03
13
*7
+ 0-06
13
0-07
16
29
0-21
9
3
-0-2S
12
-0-13
'5
July i
0-09
13
O'lO
IS
2
+ 0-05
8
0-06
13
-0-074
89
July 6
...
...
+0-27
8
7
...
...
+ O'2I
5
8
-0-17
12
+ 0'45
'3
9
...
+ 0-41
1 1
ii
0-24
13
...
July 1 2
...
+ 0-07
ii
13
+ O-O6
9
15
0-07
"(6
+ 0-25
12
July 2 1
+ 0-36
10
22
0-12
2
+ 0'26
4
Weighted Mean
o'io6
162
+ 0*270
93
The differences W E for Transit D are fairly accordant throughout, and a correction of + O s- 05 has been
applied to W groups and O s- 05 to E groups in forming the numbers in the sixth column of the following tables
which are now considered comparable and of which the daily mean is taken : for Transit E these differences show
considerable changes, and the weighted means have been taken as shown, and the following corrections applied :
s s
From June 7 to June 15 0-09 to W groups +0-09 to E groups.
June 20 to July 2 +0-04 to W groups 0-04 to E groups.
July 6 to July 22 0-14 to W groups +0-14 to E groups.
The differences from the mean are shown in the seventh column.
CLOCK ERROR.
Transit D. Greenwich Clock.
169
Date.
Mean E.A.
of Group.
Number
of Stars.
Mean Clock
Error.
Corrected.
Difference
from Mean.
Date.
Mean R.A.
of Group.
Number
of Stars.
Mean Clock
Error.
Corrected.
Difference
from Mean.
W.
E.
W.
E.
June 7
June 8
June 9
June 13
June 15
June 20
June 23
h m
15 41
16 9
4
2
I
48-51
S
48-52
s
48-47
48-56
a
0-03
+ O-o6
O-O2
+ 0-04
0-04
+ O-O6
+ 0-04
0-04
0- II
O-O2
+ O-OI
+ 0-03
o-oo
0-03
0-03
+0-03
o-oo
+ o- 1 1
-j-o-oi
0-09
June 24
June 26
June 27
June 29
June 30
July I
July 2
h m
'5 3
if> 51
18 19
5
12
I
8
49-25
8
49-41
49-29
I S
49^6
49'3
49-24
>
+ 0-05
O'OI
0-07
+0-17
0-03
0-05
+0-09
0-07
+0-08
0-04
+0-13
0-09
+0-13
+0-07
o- 14
+0-04
0-04
o-oo
+0-13
0-09
0-05
+ o- 1 1
15 50
2 > 4
48- 500
16 33
12, 6
49-313
14 48
15 29
16 10
4
5
3
48-64
48-62
48-80
48-69
48-75
48-67
'5 45
17 12
1 8 40
5
19
8
18-22
1 8 -oo
18-12
18-27
18-07
18-05
15 26
7,5
48-710
17 20
'3, '9
18- 104
14 52
15 28
16 58
18 16
7
5
12
I
48-90
48-73
48-98
48-90
48-95
48-93
48-85
48-78
I 5 3 8
17 21
"9 5
4
'5
7
18-31
18-30
18-25
18-36
18*20
18-35
16 8
8,17
48-891
17 33
u, 15
18-265
14 48
'5 45
.6 7
18 41
7
3
3
3
49-09
49-08
49-16
49-21
49-11
49-14
49-16
49-13
17 32
18 29
'9, '3
9
5
3
18-72
18-99
18-77
18-77
18-94
18-72
18 5
9,8
18-811
'5 57
6, 10
49-129
15 50
17 ii
18 52
3
12
9
19-20
18-93
19-24
19-25
19-19
18-98
1
'5 5'
i
49-02
4 8- 9 7
'5 5'
i
48-97
17 39
12, 12
19-119
14 58
15 42
16 52
18 26
2
4
9
5
49-05
49-08
49' '5
49-21
49-10
49-10
49-16
49' n
15 50
16 31
17 32
1 8 40
18 57
3
8
9
3
3
19-32
19-49
19-50
19-46
i9'37
I9'45
i9'37
19-41
'9'54
19-32
16 50
9, "'
49-'35
17 19
n, 15
19-407
15 38
17 10
8 34
5
12
8
49-35
49' '5
49-35
49-40
49*3
49-20
17 19
19 8
4
6
19-62
19-56
19-51
19-67
17 19
13, 12
49-288
17 52
6, 14
19-558
GREENWICH OBSERVATIONS, 1899.
170
TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1892.
Transit D. Greenwich Clock. continued.
Date.
Mean R.A.
of Group.
Number
of Stars.
Mean Clock
Error.
Corrected.
Difference
from Mean.
Date.
Mean R.A.
of Group.
Number
of Stars.
Mean Clock
Error.
Corrected.
Difference
from Mean.
W.
E.
W.
E.
July 8
July 1 1
h m
16 58
17 52
18 29
18 57
6
6
5
21-o6
21-17
&
21-26
21-31
8
21-21
21- II
2I-26
21-22
+ O-OI
0-09
+ O-00
-f-0-02
+ 0-04
O-I3
+ 0-07
o-oi
July 15
July 20
July 22
h m
17 o
'7 39
5
2
22-38
8
22-45
s
22-40
22-43
s
O-OI
+ O-O2
o-oo
+ 0-01
o-oo
17 ii
2,5
22-409
i7- 59
ii, 13
21 -20O
17 10
2
23-14
23-19
i? 15
'7 53
18 31
19 7
8
6
7
6
21-70
21-82
21-97
22-00
2I-92
21-75
26-95
21-87
17 10
2
23-19
'9 47
20 15
2
3
23-66
23-77
23-72
23-71
18 8
12, 15
21-879
20 4
3,2
23-714
Transit E. Paris Clock.
June 7
June 8
June 9
June ii
18 16
2
48-45
48-36
o-oo
O-O2
+ 0-08
o-io
+ 0-22
O-O2
+ 0-01
+ 0- II
0-04
0-ig
+ 0-04
-f 0-18
June 12
June i 3
June 15
June i 8
June 23
17 40
18 25
8
4
52-69
5*'54
52-60
52-63
o-oi
+ O-O2
0-05
0-09
+0-03
+ O- 12
o-oo
o-oo
o-oo
0-06
o- 10
18 16
2
48-36
'7 55
8,4
|
52-610
14 15
15 42
16 27
18 18
10
6
3
i
49-12
49-26
48-84
48-76
48-93
49-03
48-85
49-17
14 42
i| 34
16 55
19 14
5
8
4
53-47
53-68
53-33
53-4i
53-42
53-38
53-5
53-59
'5 '3
7, i3
48-960
16 32
9, '3
53-470
14 24
16 o
'7 54
18 18
ii
12
2
I
49-72
49-67
49'5i
49-64
49-60
49-63
49-73
49-58
17 16
1 8 46
ii
7
55-76
55-58
55-67
55-67
17 51
7, I'
55-670
15 43
'3, 13
49-623
'4 55
2
59-30
59-39
14 29
16 30
18 29
6
ii
4
51-52
51-11
51-48
51-20
51-43
51-57
H 55
2
59-390
'5 33
16 4.2
6
6
6-58
6-62
6-62
6-58
16 21
II, 10
5i-39i
CLOCK ERROR.
Transit E. Paris Clock. continued.
171
Date.
Mean R.A.
of Group.
Number
of Stars.
Mean Clock
Error.
Corrected.
Difference
from Mean.
Date.
Mean R.A.
of Group.
Number
of Stars.
Mean Clock
Krror.
Corrected.
Difference
from Mean.
W.
E.
W.
E.
June 23
June 24
June 26
June 27
June 29
June 30
July i
h m
17 46
18 32
7
5
s
6-70
S
6-84
6 8 . 74
6-80
a
+ O-O6
-J-0-I2
O-O2
+ 0-01
+ 0-23
o-oo
0-04
4-0-01
o-oi
O-O2
O-O2
O-O2
+0-05
+ 0-00
,+ o o i
0-08
o-oo
+0-06
-0-15
0-09
o-oo
+ 0-06
+0-09
July 2
July 6
July 7
July 8
July 9
July 12
July 13
h m
i5 55
16 15
17 3
17 46
4
7
8
8
8
9-O6
9-11
8
8-96
9' 2 3
8
8-92
9- 10
9-19
9-15
8
o- 19
o-oi
+ 0-08
+ 0-04
0-25
o-oi
+0-13
0-05
-f o- ii
-0-13
+ 0-10
+ 0-06
+0-07
0-36
+0-15
O. O Q
17 6
13, II
6-683
17 I
i7 36
6
8-09
8-20
8-13
8-16
16 53
15, 12
9-115
15 56
16 52
17 55
2
8
5
12-74
12-22
12-60
12-36
12 -60
12-74
17 20
5,6
8-146
15 II
15 2 9
'5 49
l6 22
'7 37
i
6
6
7
11-25
11-26
11-56
1 1-29
11-32
11-52
1 1-29
11-25
11-30
11-28
17 6
8,7
12-615
16 17
1 8 48
8
4
13-47
I3-35
'3'33
I3-49
16 18
'3, H
11-299
7 7
8,4
13-383
15 48
1 6 24
17 28
18 32
6
7
12
7
4-22
4-29
4'3
4 - 3
4-26
4-26
4-26
4'33
'5 53
16 41
17 30
18 26
19 19
2
7
10
4
4
14-62
H'59
I4-II
I4-30
13-88
14-25
14-48
14-44
I4-4S
14-02
17 6
14,18
4-275
17 35
n, 16
14-376
16 32
4
6-09
6-13
l6 22
17 27
19 49
6
10
5
15-58
15-42
I5-07
'5*44
15-21
15-28
16 32
4
6-13
o-oi
+0-03
0-07
+0-28
0-05
O-20
+0-13
o-oo
15 44
16 23
'7 5
17 32
8
8
7
7
7-03
7-17
7-20
7-19
7-16
7-07
7-15
7-21
17 4 2
II, 10
15-292
16 52
18 59
19 48
20 27
12
7
i
3
18-39
18-41
I8-2I
18-46
18-35
18-25
18-60
18-27
16 38
r 5, IS
7-145
15 56
16 16
16 54
17 29
17 56
2
7
6
10
6
8-02
8-ii
8-26
8-16
8-31
8-06
8-12
8-15
8-27
8-30
18 6
10, 13
18-320
17 24
18 59
19 55
5
8
6
19-06
19-26
19- II
18-92
19-25
19- 12
17 5
H, 17
8-205
18 52
11,8
I9-I25
172
TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1892.
Transit E. Paris Clock. continued.
Mean Clock
Mean Clock
Date.
Meau R.A.
of Group.
Number
of Stars.
Error.
Corrected.
Difference
from Mean.
Date.
Mean R.A.
of Group.
Number
of Stars.
Error.
Corrected.
Difference
from Mean.
W.
E.
W.
E.
h in
8
8
s
h m
s
S
s
s
July 1 5
17 3
6
20-53
20-67
+ 0-13
July 2 1
20 35
IO
26-57
26-43
o-oi
19 29
6
20-65
20-51
0-03
22 23
10
26-26
26-40
0-O2
*i 37
3
20-74.
20-33
20-47
20-60
+ 0-06
21 29
IO, 10
26-415
1
19 40
9, 18
20-538
July 22
I 7 3 8
8
27-75
27-61
o- 10
18 ia
27" CO
27 -64.
O-O7
10 JU T
19 '3 4
27-91
27-77
+ O-O6
,
20 58 7
27-70
27-84
+ 0-13
July 1 8
"7 57
i
23-58
Z 3'44
o-oo
21 49 6
27-87
27'73
+ O-O2
17 57
i
23-440
19 41 18, ii
27-712
1
From comparison of consecutive clock-errors thus determined, the rates of the
clocks in the interval have been deduced and are set down in the second and fifth
columns of the following Table. The clock-rates adopted for each day given in the third
and sixth columns are in general the means of the figures preceding and following in
the second and fifth columns. In the case of the Sidereal Standard the rates as found
from observations with the Greenwich Transit- Circle 'have been added for comparison.
Clock Rate.
Siilereal Standard at Greenwich.
Graham z at Paris.
Sidereal Standard at Greenwich.
Graham 2 at Paris.
Date.
Hourly Rate.
Hourly Rate.
Date. Hourl y Rate>
Hourly Rate.
from Star
Obs.
Adopted.
by the T. C.
Observer.
from Star
Obs.
Adopted.
from Star
Obs.
Adopted.
by the T. C.
Observer.
from Star
Obs.
Adopted.
1892.
i
8
8
8
a
1892.
8
s
8
3
June 7
+ 0-008
+ 0-005
+ 0-028
June i 3
+ O-OO3
+ O-OO2
+ 0-043
+ 0-009
+ 0-028
0-003
+ 0-045
8
+o - oo8
+ 0-005
+ 0-028
>5
O-OO3
+ O-O03
+ 0-043
+ 0-007
+ O-O27
9
+0-005
+ 0-006
+ 0-032
20
+ O-O36
+ O'OO2
1 1
+0-003
+ 0-043
23
+ o-oo i
+ O-O03
+ O-O64
+ 0-003
+ 0-048
+0-000
+ o - o6o
12
+0-003
+0-003
+0-043
24
+ O-QOO
+ 0-005
+ O-O64
-
+ 0-038
+0-067
CLOCK RATE.
Clock Bate. continued.
. 173
Sidereal Standard at Greenwich.
Graham 2 at Paris.
Sidereal Standard at Greenwich.
Graham 2 at Paris.
Date.
Hourly Rate.
Hourly Rate.
Date.
Hourly Rate.
Hourly Rate.
from Star
Obs.
Adopted.
by theT.C.
Observer.
from Star
Obs.
Adopted.
from Star
Obs.
Adopted.
by theT.C.
Observer.
from Star
Obs.
Adopted.
1892.
,
s
,
8
8
1892.
8
s
1
8
a
June 26
+ 0-007
+ O-OI2
+ O-O64
July 8
+ O-OO8
+ 0-010
+ 0-040
+ 0-007
+ 0-038
27
+0-009
+ O'OI2
+ O-04I
9
+ O-OO9
+ 0-010
+ 0-040
+ 0'OI I
+ 0-039
29
+ O-OI2
+ O-OI3
+ 0-04I
ii
+ O-OO8
+0-005
+ 0-042
+0-013
+ O-042
30
+ O-OI2
+ O-OI3
+ O-O4I
12
+ 0-037
+ O-OO6
+0-032
+ 0-012
+ 0-043
'3
+ 0-031
July i
+ O-OO9
+ 0-010
+ 0-04I
+ 0-029
+ O-OO6
+ 0-038
IS
+ O-OO7
+0-007
-hO-035
2
+ 0-006
+0-007
+ O-O4I
+ O-OO7
20
+ 0-006
+ 0-040
6
+ 0-039
+ 0-032
21 +0-OIO
+ 0-009
+ 0-008
+ 0-050
7
+ 0-010
+ 0-037
+ 0-058
+ O-O4I
22
+ 0-009
+ 0-008
+ 0-058
The Sidereal Standard stopped and was set going again between June 24 and 26.
Graham 2 stopped and was set going again between June 26 and 27.
The Clock Errors as shown in the Table on page 169 a,t the Mean Sidereal Time of
Observation together with the Adopted Rates shown above, have been collected in the
following Table for convenience of reference.
Date.
Sidereal Standard at Greenwich.
Graham 2 at Paris.
Mean Sidereal Time
of Star Observations,
(local)
Adopted
Clock Slow.
Hourly
Losing Rate.
Mean Sidereal Time
of Star Observations,
(local)
Adopted
Clock Slow.
Hourly
Losing Rate.
h ra
8
8
b m
8
9
June 7
15 50
48-500
+ 0-008
18 16
48-360
+ 0'028
8
15 26
48'7IO
+ 0-008
15 13
48-960
+ 0-028
9
16 8
48-891
+ 0-005
15 43
49-623
+ 0-032
ii
16 21
Si'39 1
+ 0-043
12
'7 55
52-610
+ 0-043
13
IS 57
49-I29
+ 0-003
16 32
53H70
+ 0-043
'5
'5 Si .
48-970
0-003
17 51
55-670
+ 0-043
20
16 50
49*'35
2 3
17 19
49-288
+0-001
17 6
6-683'
+ 0-064
2 4
'6 33
49'3i3
o-ooo
17 20
8-146
+ O-O64
26
17 20
18-104
+0-007
16 iS
11-299
+ O-O64
27
'7 33
18-265
+0-009
17 6
4' 2 75
+ 0-O4I
29
18 5
18-811
+ 0-012
16 32
6- 130
+ 0-04I
3
'7 39
19-119
+ O-OI2
16 38
7-145
+ 0-04I
174 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1892.
Clock Rate. continued.
Date.
Sidereal Standard at Greenwich.
Graham z at Paris.
Mean Sidereal Time
of Star Observations,
(local)
Adopted
Clock Slow.
Hourly
Losing Rate.
Mean Sidereal Time
of Star Observations,
(local)
Adopted
Clock Slow.
Hourly
Losing Rate.
h m
8
s
h m
8
July I
17 19
I9-4.07
+ 0-009
'7 S
8-205
+ 0-041
2
17 52
I9-558
+ 0-006
16 53
9'IIJ
+ 0-041
6
17 6
I2-6I5
+ 0-039
7
17 7
I3-383
+ 0-037
8
"7 59
2 I 2OO
+0-008
i/ 35
I4-376
+ 0-040
9
17 42
I5-292
+ 0-040
1 1
18 8
2I-8 7 9
+ 0-008
12
18 6
I8-32O
+ 0-037
'3
18 52
I9-I25
+0-031
15
17 ii
2 2 ' 409
+ 0-007
19 40
20-538
+ 0-035
20
17 10
23-190
21
21 29
26-4I5
+ 0-050
22
20 4
ZS^H
+0-009
19 41
27-7I2
+ 0-058
XV. EXCHANGES OF SIGNALS.
The individual signals of an exchange were made by means of the observation tapper
as explained on page 127. The programme arranged for each exchange was as follows.
Greenwich sends 20 signals.
Paris sends 20 signals.
Greenwich sends 10 signals.
Paris sends 10 signals.
But as only one pen was used for making the record on the chronograph slip, both of the
clock seconds and the signals, it is not possible to read accurately the time of such signals
as happen at the same instant as a clock beat, and for this reason the number of signals
set down in the third column of the following Table falls short of those given above.
Two such exchanges between the English Observers were usually made on each
evening when a determination of clock-error was made at each station. On other
nights one exchange only was made.
In the following Tables the second column gives the mean Greenwich Sidereal
Time of a set of signals the number of which is given in the third column.
The fourth and fifth columns give the difference of clocks, Graham 2 Sidereal
Standard, as given by the mean of each set of signals sent respectively from Green-
wich and Paris. The sixth column contains the simple means of the figures in the
second column, while the seventh column shows the simple means of the four differ-
ences in the fourth and fifth columns and is therefore the difference of the clocks, with
the time of transmission eliminated if this be supposed the same when the signals are
sent from Greenwich or Paris, at the time given in the sixth column.
TABLE.
175
Difference of Sidereal Standard and Graham 2 found by Signals sent from Paris
and Greemcich.
Date.
Greenwich
Sidereal Time.
Number of
Signals.
Difference ol
signals se
Greenwich.
Clocks by
nt from
Paris.
Means of each Exchange.
Time of
Transmission.
Greenwich
Sidereal Time.
Difference
of Clocks.
1892.
b m
m s
m 8
b m
m s
r
June 7
15 38
9
9 20-352
15 41
'5 43
13
7
9 20-384
9 20-329
15 42
9 20 '344
024
'5 44
7
9 20-311
June 8
'4 '9
H
9 19-844
14 21
14 22
'3
6
9 19-833
9 19-77
14 22
9 19-804
035
14 24
6
9 19-768
17 51
4
9 19-788
'7 55
17 56
15
10
9 '9*764
9 '9 <6 99
'7 55
9 I9-736
040
'7 57
8
9 '9' 6 94
June 9
14 3*
'4
9 19-291
'4 34
'4 35
17
7
9 19-290
9 19-209
'4 35
9 '9* 2 44
047
'4 37
10
9 'g-'Ss
16 51
'7
9 i9'3
16 51
16 50
'9
8
9 19-233
9 19-160
16 51
9 19-192
036
16 52
10
9 '9-I5I
June i i
15 23
8
9 '7'775
15 24
15 27
10
10
9 17-679
9 '7-697
15 26
9 I7-736
048
'5 29
13
9 '7'79 2
June i 2
15 27
'9
9 16-872
15 28
'5 34
10
9
9 '6-773
9 '6-754
15 30
9 16-818
053
Juno i 3
15 36
15
9 '5'9 2 3
15 38
'5 39
20
IO
9 '5-938
9 '5-859
'5 38
9 I5-893
038
'5 4
10
9 15-851
17 50
20
9 I5-845
17 52
20
9 '5'77 2
>7 53
IO
9 15-860
18 6
9 15-803
-041
'7 55
9
9 15-765
18 59
2 3
9 15-809
June i 5
'4 57
'9
9 14-069
H 59
16
9 i 4 oo i
'4 59
9 I4-034
027
15 o
8
9 '4-53
'5 i
10
9 14-014
176 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1892.
Difference of Sidereal Standard and Graham 2 by Signals sent from Paris
and Greenwich. continued.
Date.
Greenwich
Sidereal Time.
Number of
Signals.
Difference of
signals sei
Greenwich.
Clocks by
it from
Paris.
Means of each Exchange.
Time of
Transmission.
Greenwich
Sidereal Time.
Difference
of Clocks.
1892.
h in
m a
m 8
h m
m a
1
June i 8
15 19
1 1
9 10-705
15 20
15 22
18
9
9 10-711
9 10-632
15 21
9 10-673
35
IS 23
6
9 10-645
June 22
IS S5
20
9 5-123
IS 57
16 5
18
16
9 5-"4
9 5-54
16 i
9 5-070
048
16 7
3
9 4-987
June 23
16 1 1
20
9 3-764
16 12
16 14
2
9
9 3-73I
9 3-660
16 19
9 3-704
041
16 29
15
9 3-658
18 38
14
9 3-617
1 8 40
18 41
12
9
9 3'579
9 3'5'S
1 8 40
9 3-55 8
039
1 8 42
8
9 3-52I
June 24
16 15
6
9 2-303
16 17
16 18
18
7
9 2-287
9 2-234
16 17
9 2-270
024
16 19
8
9 2-257
June 2 5
IS 55
17
9 -784
IS S 6
IS 58
16
10
9 0-788
9 0-698
'5 57
9 -.74*
044
'5 59
5
9. 0-696
June 26
16 42
i7
9 27-856
'6 43
16 44
16
6
9 27-833
9 27-766
16 44
9 27-802
042
16 45
8
9 27-754
18 20
16
9 27-756
18 21
18 22
20
8
9 27-755
9 27-676
18 22
9 27-712
043
18 23
7
9 27-659
June 27
16 39
'9
9 35-166
1 6 40
>6 43
17
JO
9 35-162
9 35-109
16 41
9 35-I38
026
16 43
9
9 35-H4
i? 49
i5
9 35-143
17 50
17 5'
>5
10
9 35-ioS
9 35-055
17 50
9 35-o87
037
17 52
ii
9 35-045
. _
TABLE.
177
Difference of Sidereal Standard and Graham 2 found by Signals sent from Paris
and Greenwich. continued.
hg
O .
Difference of Clocks by
Means of each Exchange.
Date.
Greenwich
Sidereal Time.
H
5 S:
signals s<
nt from
Greenwich
Difference
Time of
Transmission.
I"
Greenwich.
Paris.
Sidereal Time.
of Clocks.
1892.
h m
m a
m s
h m
m s
i
June 29
I 5 5 8
'9
9 33' 8 4
15 o
!5 '
10
10
9 33-84I
9 33-789
16 i
9 33-8i7
023
16 4
10
9 33-79 8
June 30
16 31
17
9 33-052
16 32
16 33
20
I I
9 33-055
9 32-962
16 32
9 33-012
042
16 34
9
9 32-979
17 52
'9
9 33-011
17 54
17 55
17
10
9 33-025
9 32-925
'7 55
9 32-97*
046
17 56
1 1
9 32-925
July i
16 29
17
9 32-206
16 30
16 31
20
8
9 32-218
9 32-121
16 31
9 32-161
053
16 32
9
9 32-089
18 28
17
9 32-160
18 29
18 30
20
9
9 32-I37
9 32-015
18 29
9 32-089
060
18 31
10
9 32-043
July 2
16 31
20
9 31-516
16 32
16 33
17
IO
9 3''52i
9 31-439
16 32
9 31-475
044
'6 34
7
9 31-423
17 46
17
9 31-462
17 47
17 48
8
9
9 31 -4 66
9 31-390
17 48
9 3i-4*4
040
17 51
10
9 3I-378
July 6
16 18
21
9 28-542
16 19
l6 20
18
IO
9 28-529
9 28-444
16 19
9 28-491
045
16 20
10
9 28-447
July 7
18 6
17
9 27-695
18 7
18 8
H
ii
9 27-709
9 27-628
18 7
9 27-656
046
18 8
9
6 27-592
July 8
16 31
'9
9 27-084
16 32
' 6 33
5
7
9 27-074
9 26-954
16 32
9 27-015
039
16 34
7
9 26-947
GREENWICH OBSERVATIONS, 1899. z
-
178 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1892.
Difference of Sidereal Standard and Graham 2 found by Signals sent from Paris
and Greenwich. continued.
lM
O .
t- m
Difference of Clocks by
Means of each Exchange.
Date.
Green wicli
Sidereal Time.
Si
s a,
signals se
nt from
Greenwich
Difference
Time of
Transmission.
!*
Greenwich.
Paris.
Sidereal Time.
of Clocks.
1892.
h m
m s
m s
b m
m s
s
July 9
16 31
3
9 26-337
16 32
'6 33
16
ii
9 26-277
9 26-279
'6 34
9 26-312
034
16 38
12
9 26-353
July n
17 i
H
9 24-598
17 2
17 2
IS
9
9 24-627
9 24-545
17 2
9 24-580
033
17 4
ii
9 24-548
18 32
16
9 2 4-555
18 33
18 36
10
13
9 24-568
9 24-485
'8 35
9 24-526
036
18 37
6
9 24-497
July 12
17 49
20
9 23-890
>7 49
17 50
'4
12
9 23-908
9 23-814
'7 49
9 23-864
035
17 50
8
9 23-845
July 1 3
17 2
IS
9 23-27
17 2
17 4
'9
8
9 23-265
9 23-176
'7 4
9 23-223
045
17 6
13
9 23-179
July 1 5
18 28
'9
9 21-857
18 29
18 30
17
10
9 21-870
9 21-758
18 29
9 21 -820
044
18 31
10
9 21-795
July 20
'8 43
18
9 '7'955
18 44
18
9 17-906
18 45
9
9 '7-970
1 8 46
9 17-928
032
18 46
9
9 17-891
18 50
17
9 17-956
July 2 1
17 26
'9
9 '7-956
17 27
17 34
28
10
9 17-011
9 17-000
17 29
9 '7-035
043
July 22
18 12
20
9 I5-99 6
18 14
16
9 15-907
18 15
'3
9 '5-972
18 15
9 15-952
034
18 16
8
9 15-929
18 18
9
9 '5'9 8 7
Mean
040
RESULTING DIFFERENCE OF LONGITUDE.
179
RESULTING DIFFERENCE OF LONGITUDE..
In the following table the second, third and fourth columns give respectively the
Greenwich Sidereal Time of the Star Observations at Paris, at Greenwich, and of the
exchanges of signals. The difference of clocks, as found by each exchange of signals,
is given in the fifth column. In the sixth and seventh columns are the errors of the
clocks, found from star observations reduced by application of the rates given in the
table on p. 173 to the time in the fourth column, and from the figures in the fifth,
sixth and seventh columns the values of the longitude, uncorreeted for personal
equation, given in the eighth column are deduced.
Date.
Mean Time
Sidereal
Obseii
at Paris.
(Greenwich
) of Star
'ations
at Greenwich.
Greenwich
Sidereal
Time of
Signals.
Difference
of Clocks by
Signals.
Graham 2
Slow.
Sidereal
Standard
Slow.
Difference of
Longitude.
Discordance
from
Mean.
Part I. H. at Paris. H.T. at Greenwich.
u m
h m
h m m s 8
8
m s
8
June 8
'5 4
15 26
14 22 9. 19-804
48-940
48702
9. 20-042
+ 0-013
8
17 55 19-736
49-040
48-729
20-047
+ o-o i 8
9
'5 34
16 8
14 35 19-244
49-592
48-884
19-952
- 0-077
9
16 51 19-192 i 49-664
48-894
19-962
0-067
13
16 23
15 57
15 38
I 5' 8 93
53H38
49-I28
2O-2OO
+ 0-174
13
18 6
15-803
53-544
49 M 35
20'2I2
+ 0-183
Mean
9. 2O-O7O
Part
II. H.T. at Paris. H. at Greenwich.
23
16 57
17 19
16 19
9. 3-704
6-642
49-287
9. 21-059
+ 0-008
23
18 40
3-558
6-793
49-290
"O6 I
+ o-oio
H
17 ii
16 33
16 17
2-270
8-088 ; 49-313
045
0-006
26
16 9
17 20
16 44
27-802
11-336
1 8- 1 oo
038
0-013
26
18 22
27-712
11-441
18-1 i i
042
0-009
27
16 57
'7 33
16 41
35-I38
4-264
18-257
''45
+ 0-094
27
17 50
35-087
4-311
18-268
130
+ 0-079
29
16 23
18 5
16 i
33-817
6-115
18-787
'45
+ 0-094
30
16 29
17 39
16 32
33-012
7-147
19-106
053
-f- O'OO2
3
17 55
32-972
7-204
19-122
21-054
+ O'O03
July i
16 56
17 19
16 31
32-161
8-188
19-400
20-949
O-IO2
I
18 29
32-089
8-268
19-418
'939
0'II2
2
16 44
17 52
16 32
.3I-475
9-107
19-550
21-032
0-OI9
2
17 48
3i-4 2 4
9-159
19-558
21-025
0-O26
Mean
9. 21-051
180 TELEGRAPHIC DETERMINATIONS OF LONGITUDE, PARIS-GREENWICH MADE IN 1892.
Date.
Mean Time
Sidereal
Observ
at Paris
(Greenwich
of Star
itions.
at Greenwich.
Greenwich
Sidereal
Time of
Signals.
Difference of
Clocks by
Signals.
Graham 2
Slow.
Sidereal
Standard
Slow.
Difference of
Longitude.
Discordance
from
Mean.
Part III. H. at Paris. H.T. at Greenwich.
July 8
'5
22
h m
17 26
"9 31
I 9 3 2
fa m
'7 59
17 ii
20 4
h m
16 32
i 8 29
18 15
m s
9. 27-015
2I-82O
9. 15-952
S
14-340
20-502
27-637
s
21-189
22-418
23-698
Mean
m s
9. 20-166
19-904
19-891
s
+ 0-137
0-125
- 0-138
9- ! 9'9 8 7
The squares of the discordances in the last column give for the mean discordance
of a single determination.
Parts I. and III. O s '126.
II. 3 -052.
Mean =t 8< 089.
Thus we have the following results :
From Parts I. and III. 9 m 20 S> 029 H= O s '042.
II. 9 m 21 S '051 O s> 016.
Longitude of the Paris instrument east of the Greenwich instrument :
9 20'54 s 022.
This longitude refers to the following meridians :
' At Paris the pier of the English instrument which is B> 27 west of Cassini's
meridian.
At Greenwich the old meridian of Bradley 19 ft. or 8 '02 west of the Transit Circle.
Thus the meridian of Cassini is
9 m 20 8> 54 -0-02 +0 8 '27 or
9 m 20 8 '79 E.
of the Greenwich Transit Circle.
TELEGRAPHIC DETERMINATION
OF THE
DIFFERENCE OF LONGITUDE
BETWEEN
PARIS AND GREENWICH
IN THE YEAE 1902.
I. INTRODUCTORY.
IN view of the discordance between previous determinations of the longitude Paris
Greenwich, the view was expressed at the International Geodetic Conference in 1898
that a re-determination was desirable. It was arranged by M. Loewy and the Astronomer
Royal that the re-determination should be undertaken in concert by the two observatories
of Paris and Greenwich. Owing to the longitude determinations of Greenwich' Killorglin
in 1898 by members of the Greenwich Staff, and circumstances connected with the
Eclipse expeditions of 1900 and 1901, it was not found practicable to begin this work
until 1902.
After some correspondence between M. Loewy and the Astronomer Royal, it was
arranged that a re-determination of the difference of longitude should be made in two
parts, each complete in itself, with double interchange of observers and instruments,
the first part in October 1901, and the second in March 1902. It was proposed that
the observations should be made by four observers, two from Paris and two from
Greenwich, using four precisely similar portable transit instruments belonging to the
Royal Observatory, Greenwich. A pair of these instruments would be sent to
M. Loewy to be tested by him before the beginning of the longitude determination.
GREENWICH OBSERVATIONS, 1902. 2 a
182 TELEGRAPHIC DETERMINATION OP LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
The pairs of instruments at Paris and Greenwich would be interchanged with the pairs
of observers twice in each part of the operations, so that each observer would take
his own instrument with him.
M. Lrewy came to Greenwich in 1901 June to discuss arrangements with the
Astronomer Royal, when it was decided that the first part should be begun in March
1902 and the second in September of the same year. M. Loewy named M. Renan and
M. Bigourdan as the French observers, the English observers being Mr Dyson, Chief
Assistant, and Mr Hollis.
The following programme indicating the stations of the observers in each series was
drawn up, the letters B, C, D, E, indicating the transit instruments to be used by
Mr Dyson, Mr Hollis, M. Renan and M. Bigourdan respectively :
PART I. 1902. March, April, May.
Series I.
C., D. at Greenwich . , . B., E. at Paris
Series II.
,, . . C., D. ,, ,,
,, . . L., D. ,, ,,
Series III.
,, . . B., E. ,, ,,
B E
-U., J-l. ,,
B E
**! J -
C., D.
3 nights.
3 nights.
3 nights.
3 nights.
PART II. 1902. September, October, November.
Series I.
. B., D. at Greenwich . . C., E. at Paris . 3 nights.
C E
V>. , .LJ. M
C E
'-'i *-*' D
B.,D.
Series II.
. B., D.
B., D.
Series III.
G E
\Jf y J-J, , .
3 nights.
3 nights.
3 nights.
The transit instruments D and E were" sent to Paris in 1901 October. Preliminary
experimental observations were made at Greenwich with transits B and C in the first
three months of 1902. On March 15, M. Renan came to Greenwich and Mr Dyson
went to Paris, and the operations were carried on by the English observers as shown in
the following table. The first series of Part I. was not completed by the French
INTRODUCTORY. 183
observers until April 7. On April 8, M. Renan left Greenwich, and M. Bigourdan came
to Greenwich. When M. Renan arrived in Paris he was taken seriously ill, and the
work was necessarily discontinued by the French observers. M. Bigourdan remained at
Greenwich and made experimental observations until M. Loawy decided that M. Renan
should be replaced by M. Lancelin, and on April 18 M. Bigourdan returned to Paris.
M. Bigourdan came to Greenwich again on April 27, and Part 1. was begun again by the
French observers, so that their Series I. coincided in time with Series III. of the English.
M. Lancelin used transit D, and the scheme of arrangement given above was modified,
so far as the French observers are concerned, by the interchange of the letters D and E.
The programme was carried out by the English observers (Mr Dyson and Mr Hollis) as
shown in the scheme :
PART I.
Mr Dyson at Paris. Mr Hollis at Greenwich.
March 16. Partly fine G : trial signals exchanged.
March 17. Cloudy P: clear G.
March 18. Partly clear P : cloudy G. : two exchanges of signals.
March 19. Clear P and G : two exchanges.
March 20. Cloudy P : clear G : one exchange.
March 21. Cloudy P : clear G : one exchange.
March 22. Cloudy P : clear G : one exchange.
March 23. Clear P : partly clear G : two exchanges.
March 24. Cloudy P and G : one exchange.
March 25. Clear P and G : two exchanges.
March 26. Cloudy P and G : one exchange.
March 27. Cloudy P : clear G : one exchange.
March 28. Clear P and G : two exchanges.
March 29. Cloudy P and G : one exchange.
March 30. Cloudy P aud G : one exchange.
March 31. Mr Dyson returned to Greenwich.
(End of 1st Series.)
Mr Dyson at Greenwich. Mr Hollis at Paris.
April 6. Mr Hollis arrived at Paris 8 h P.M. : clear P : no observations : partly
clear G : experimental exchange of signals.
April 7. Clear P : cloudy G : one exchange.
April 8. Partly clear P : clear G : two exchanges.
April 9. Clear P : cloudy G : one exchange.
April 10. Cloudy P : partly clear G : one exchange.
April 11. Clear P : cloudy G : one exchange.
184 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
April 12. Cloudy P : partly clear G : one exchange.
April 13. Clear P and G: two exchanges.
April 14. Cloudy P and G : one exchange.
April 15. Cloudy P and G : one exchange.
April 16. Cloudy P and G : one exchange.
April 1 7. Clear P and G : two exchanges.
April 18. Clear P and G : two exchanges.
April 19. Cloudy P and G : one exchange.
April 20. Clear P : partly clear G : one exchange.
April 21. Clear P : cloudy G : one exchange.
April 22. Cloudy P : clear G : one exchange.
April 23. Clear P and G : two exchanges.
April 24. Clear P and G : two exchanges.
April 26. Mr Hollis left for Greenwich : Mr Dyson left for Paris.
(End of 2nd Series.)
Mr Dyson at Paris. Mr Hollis at Greenwich.
April 27. Cloudy P : clear G : one exchange.
April 28. Clear P and G : two exchanges.
April 29. Partly clear P : cloudy G : one exchange.
April 30. Cloudy P and G : one exchange.
May 1 . Clear P and G : two exchanges.
May 2. Cloudy P : clear G : one exchange.
May 3. Clear P and G.: two exchanges.
(End of Part I.)
PART II.
Mr Dyson at Greenwich. Mr Hollis at Paris.
Sept. 20. Mr Hollis left for Paris.
Sept. 21. Clear P : partly clear G : one exchange.
Sept. 22. Clear P. and G. : two exchanges.
Sept. 23. Cloudy P : partly clear G : one exchange.
Sept. 24. Clear P and G : two exchanges.
Sept. 25. Cloudy P : partly clear G : one exchange.
Sept. 26. Clear P and G : two exchanges.
Sept. 28. Mr Hollis came to Greenwich : Mr Dyson left for Paris.
(End of 1st Series.)
Mr Dyson at Paris. Mr Hollis at Greenwich.
Sept. 29. Cloudy P : clear G : one exchange.
Sept. 30. Cloudy P and G : one exchange.
INTRODUCTORY. 185
Oct. 1. Cloudy P and G : one exchange.
Oct. 2. Cloudy P : clear G : one exchange.
Oct. 3. Cloudy P and G : one exchange.
Oct. 4. Cloudy P and G : one exchange.
Oct. 5. Cloudy P and G : one exchange.
Oct. 6. Partly clear P : cloudy G : two exchanges.
Oct. 7. Clear P : cloudy G : one exchange.
Oct. 8. Partly clear P : clear G : two exchanges.
Oct. 9. Partly clear P and G : two exchanges.
Oct. 10 Clear P and G : two exchanges.
Oct. 11. Cloudy P and G : one exchange.
Oct. 12. Cloudy P : clear G : one exchange.
Oct. 13. Partly clear P : cloudy G : one exchange.
Oct. 14. Clear P and G : two exchanges.
Oct. 15. Partly clear P and G : one exchange.
Oct. 16. Clear P and G : two exchanges.
Oct. 17. Clear P and G : two exchanges.
O
Oct. 1 8. Cloudy P : clear G : one exchange.
Oct. 1 9. Cloudy P and G : one exchange.
Oct. 20. Cloudy P and G : one exchange.
Oct. 21. Clear P and G : two exchanges.
Oct. 22. Clear P and G : two exchanges.
Oct. 24. Mr Dyson arrived at Greenwich : Mr Hollis left for Paris.
(End of 2nd Series.)
Mr Dyson at Greenwich. Mr Hollis at Paris.
Oct. 25. Clear P : partly clear G : one exchange.
Oct. 26. Partly clear P and G : two exchanges.
Oct. 27. Partly clear P and G : two exchanges.
Oct. 28. Partly clear P : cloudy G : one exchange.
Oct. 29. Clear P and G : two exchanges.
Oct. 30. Cloudy P : clear G : one exchange.
Oct. 31. Clear P : cloudy G : one exchange.
Nov. 1. Cloudy P : partly clear G : one exchange.
Nov. 2. Clear P : partly clear G : two exchanges.
Nov. 3. Clear P : partly clear G : one exchange.
Nov. 4. Clear P and G : two exchanges.
(End of Part II.)
186 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
The following account refers exclusively to the observations made by the English
observers except in the section relating to the corrections applied to the Tabular
apparent R.A. of stars where the corrections found by the French observers are included
in forming the means :
II. OBSERVING STATIONS.
Greenwich. The observations at Greenwich were made in the Transit Pavilion
which is described on pp. 115, 116. of the section giving the account of the Paris-
Greenwich longitude determination in 1892.
Paris. The observations were made at Paris in a brick and stone building specially
erected in the grounds to the south of the Observatory. The centre of the pier, which
was of brick on a concrete foundation 1 metre cube, was 92 '9 feet east of Cassini's
meridian, 115'1 feet south and 12'0 feet west of the centre of the Grand Cercle
Meridien of the Paris observatory. The height of the pier above the floor of the
pavilion was 2 '30 feet.
Ill INSTRUMENTS.
The instruments used by the English observers were those designated B and C of
the series of five transits, precisely similar in all respects, constructed for the Transit of
Venus expedition (1874). A description of 'these taken from the volume Transit of
Venus 1874, British Observations has been reprinted on pp. 6 and 7 of the account of
the Paris Greenwich longitude determination, 1888. The most recent occasion on
which transits B and C had been used was in the determination of the longitude of
Montreal in 1892 when they were lent to the Canadian observers. In 1901, the four
transits B, C, D and E were overhauled, examined and cleaned by Messrs Trough ton
and Simms, and relacquered externally. A buffer and spring to hold the lenses of the
object-glass firmly in their place were fitted to the object-glass cells of Transits B and C
similar to those already attached to transits D and E, as described on p. 116 of the
account of the determination of the Paris Greenwich longitude, 1892. In the course
of the preliminary observations, the webs of transit B were broken and were replaced by
a new system.
For the purposes of this determination two cast-iron stands with steel segmental
bearings fitted with apparatus for rapidly reversing the telescope in its bearings were
supplied by Messrs Troughton and Simms. These were similar, but with small differ-
ences, to the two stands supplied for the Montreal longitude, and described on p. 116 of
the account of the Paris Greenwich longitude, 1892. The new stands are not so heavy,
INSTRUMENTS. 187
the steel segments not so broad as those of the older stands, and the reversing apparatus
is not supplied with anti-friction wheels or springs to act as counterpoises. These
counterpoise springs had indeed been removed from the older stands. The new transit-
stands are numbered 1 and 2 ; the stands which had been numbered I. and II. in
the Paris Greenwich longitude, 1892, are designated 3 and 4 in the paragraph which
follows.
The transit-stands were disposed as follows :
PART I.
Stand 1 was used by the English observers at Greenwich.
Stand 2 ,, ,, French ,, Greenwich.
Stand 3 English Paris.
Stand 4 ,, ,, French ,, Paris.
During the whole of Part 1. Stand 1 was set up at Greenwich with the level adjust-
ing screw at the east end of the pier, Stand 3 was set up at Paris with the level adjust-
ing screw at the west end of the pier.
In 1902 August it was decided that during Part II. one stand should be appropriated
to each individual instrument, and that the stands should change stations with the
observers and instruments. In this part, therefore, Stand 1 was used in each series with
Transit C, Stand 2 with Transit B, and in all cases the stands were set up with the
level adjusting screw at the east end of the pier.
Before the observations of Part II. were begun, the bearings of Stand 2 were re-
ground, and the reversing apparatus of Stands 1 and 2 was slightly modified. The
illumination of the field of the transits was effected by means of electric lamps fixed
to the stands at both ends of the axis, which were always alight simultaneously.
At Greenwich these lamps were fed by storage batteries, at Paris from the lighting
circuit of the Observatory.
Bohnenberger eye-pieces of the usual direct form and also eye-pieces of the same type
with diagonal reflectors, in which the eye-tube takes a horizontal position when in use,
were supplied to each instrument. The observation of the Nadir was made by either
of these at the discretion of the observer.
The levels used were the striding-levels 'with aluminium legs fitted with micrometer
screws, as described on pp. 116 and 117 of the account of the determination of the
Paris Greenwich longitude, 1892.
188 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Marks. For the purpose of determining collimatiori with the instrument in a
horizontal position, South meridian marks were provided at both stations. At
Greenwich the 7^-inch object-glass of about 51 feet focal length, which had been made
in 1887 for use with the personal machine, was utilised for the purpose. A strong
shelf was attached to the girder on which the dome of the transit pavilion rests, and
the object-glass was set in a stand, so that it could be placed, when necessary, in a
vertical position on this shelf, and a mark on the north wall of the main observatory
building could be viewed through it by the telescope. The mark was formed by a
small hole in a metal plate, behind which an electric light was placed, and when seen
in the telescope it was very similar to the image of a star of about the 4th magnitude.
The mark was 55 feet south of the centre of the observing pier, and the object-glass, when
in position, 6 feet south of the same point. At Paris a stone pier was built 16 "4 feet
south of the centre of the observing pier, and on this a lens of 3 '2 inches aperture
was permanently fixed, through which a mark on a pier 181 feet south of the centre
of the observing pier and 5 '6 feet above the ground was viewed. This mark could
be lighted at will by an electric lamp, and when looked at through the telescope,
was seen as two close parallel black lines on a white background.
IV. INSTRUMENTAL CONSTANTS.
(1) The value of one revolution of the micrometer screws. It is explained later
in the section on Azimuth error that a close circumpolar star was usually bisected 10
times with the middle wire, the instant of bisection being registered on the chronograph.
On some occasions during the work, additional bisections, usually 10, were made when
the star was at some distance from its first position. The mean of each group of
readings for bisection is taken, and also the mean of the corresponding times. The
ratio of the differences of these means gives the value of one revolution. In the
following tables, Column 2 gives the N.P.D. of the star observed, a negative sign
implying that the observation was made below Pole. Columns 3 and 4 give the
intervals between the mean of the observations in time and revolutions of screw,
respectively. From the figures in Column 4, the weights in Column 5 are deduced.
The quotient of the quantities in Column 3 by the corresponding number in
Column 4, multiplied by sin. N.P.D., gives the results in Column 6, of which the
weighted mean is taken.
DETERMINATION OF THE VALTJK OF R.A. MICROMETER SCREWS.
189
Determination of the Value of one Revolution of the R.A. Micrometer Screws
in Equatorial Seconds of Time.
Transit B.
Date.
1902.
N.P.D. of
Star.
Interval in
Time.
Interval in Revs,
of Screw.
Weight.
Value of i rev.
in Time.
,
8
r
8
April 8
+ 8 14 21
97-35
37300
37
3-7402
8 i - 3 '3 59
127-16
1-9269
1-9
37216
10
- 4 23 9
156-37
3-I952
1-6
37426
10
- 4 23 9
'9 2 '43
3-9457
2'0
3-7296
12
+ ' 45 27
429-13
3-5122
3'5
3-7474
'3
+ 8 14 20
132-49
5-0689
5'I
37456
'3
+ ' 45 27
501-62
4-1051
4'I
37476
13
I 12 51
812-88
4-6198
4'6
37285
17
I 12 52
609-27
3'4625
3'5
3-7298
i7
I 12 52
1168-18
6-6404
6-6
37286
Mean . .
1 "7 1 6 C
J / J^J
Transit C.
March 1 7
+ i 45 35
4 l6 "37
3"4 OI 4
3-4
37593
19
i o 38
263-35
1-2405
I'2
3-745I
'9
+ 5 '5 3
148-09
3-6059
3-6
3-7584
'9
- 4 23 4
120-16
2-4572
2'5
3-7383
'9
- 3 '3 52
192-14
2-9077
2-9
37245
20
- 4 23 4
154-00
3'i472
3-i
3747
21
+ 8 14 25
133-02
5-0851
5'i
3749 '
27
+ 5 '5
I34"53
3-2744
3'3
37595
27
- 4 23 6
150-86
3-0772
3-1
37483
28
- 4 23 6
165-40
3"39i9
3'4
37284
April 9
- 4 23 9
205-99
4-2094
4'2
37422
9
+ i 45 28
161-83
i-3i74
i'3
3-7680
1 1
+ i 45 27
165-93
1-3634
i'4
373^8
13
I 12 51
166-64
o-9374
0-9
37671
17
I 12 52
231-82
1-3149
i-3
3737
18
- 3 14 i
235-62
3-5459
3'5
3-7481
20
- i 12 53
319-04
1-801 j
1-8
37555
23
- 3 H 2
251-48
3-7823
3-8
375 8
24
- 3 14 2
132-41
1-9998
2-O
37352
May i
- 4 16 9
171-27
3-414
3'4
37345
2
+ i 45 22
151-26
1-2325
1-2
3-7609
3
- 4 16 9
233-49
4-6436
4-6
3743'
37458
GREENWICH OBSERVATIONS, 1902.
2 b
190 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Transit C7. continued.
Date
1902.
N.P.D. of
Star.
Interval in
Time.
Interval in Revs,
of Screw.
Weight.
Value of i rev.
in Time.
1 H
s
r
8
Sept. 22
+ 4 22 39
28O'IO
5-7019
57
3-7495
26
+ I 12 48
262'O2
''4743
'5
37630
29
+ o 59 58
449'33
2-OgjO
2'l
37487
Oct. 8
- i 45 46
666-55
5-4669
5'5
37508
9
+ 3 13 32
279-05
4-1872
fa
37497
10
- * 45 47
270-55
2-2272
2'2
37374
IS
- 5 '5 33
18370
4-4966
4'5
37446
16
- > 45 49
31276
2-5650
2-6
37527
16
+ 4 '5 47
205-1 1
4-0651
4''
3757
21
- 5 '5 34
i49-'3
3-6696
37
37253
21
+ i 12 38
266-54
1-5029
''5
37472
22
+ I 12 3 8
670-14
37776
3'8
3-7478
27
- ' 45 53
293-14
2-4127
2'4
374' 8
28
+ 3 '3 25
249-28
37354
37
37528
3'
+ I 12 35
254-60
1-4365
'4
374'6
Nov. 3
+ 4 15 40
201-76
4-0106
4-0
3-7380
3
+ i 12 34
535-79
2-9993
J'O
3-7702
Mefin
3-74.76
J /T/
Inequality of the Micrometer Screws. At Paris a scale of opal glass, divided by black
lines, was provided, which could be placed in the focus of the lens of the collimating
mark for the purpose of determining the errors of the micrometer screws. The intervals
of the scale were of such size that each was equivalent approximately to one revolution
of the screw, and the middle interval was subdivided into tenths. A complete series of
observations, which it is not necessary to describe in detail, were made with this scale to
determine the errors of the screw of Transit B. The result is given in the following
table of corrections which are applicable at different screw readings if the uniform value
1 = 3 S 736 = 56"'04 is used.
Part of Screw
in Use.
rev.
5'4
6-4
7'4
8-4
9'4
Correction.
+ 0-26
+ 0-17
+ 0-17
+ 0-06
+ 0'02
Part of Screw
in Use.
rev.
10-4
11-4
12-4
3'4
"4'4
154
Correction.
M
0-09
O-06
+ 0-06
+ 0-20
+ 0-50
+ 74
The part of the screw used was generally between 8'4 rev - and 13'4 rev -, where the
correction is small. The effect of applying these corrections can be seen from the
INEQUALITY OF MICROMETER SCREWS. 191
following values of n determined on 1902 April 17 and computed with and without
these corrections.
Values of n Determined with Adopted Value of Screw.
Corrected. Uncorrected.
s s
+ 0-873 + 0-862
+ 0-852 + 0-852
+ 0752 + 0750
+ 0-817 + 0-819
+ 0-823 + 0-820
+ 0-851 + 0-854
Means + 0-828 +- 0-826
Similar observations with the scale were made with Transit C, from which it appeared
that the errors of the micrometer screw were of the same order of magnitude. As
the effect of the corrections is so small, no corrections for inequality of the screws
have been applied, and the following values have been used throughout :
For Transit B, i revolution = 3 8 736= 56"'O4
For Transit C, i revolution = 3 S 746= 56"-i9
(2) The Equatorial intervals of the vertical wires were found from all the observations
of transits of stars made during the longitude, omitting those for which the transit was
not observed over all the nine wires. The difference between the observed time on
each wire and of that on the centre wire was multiplied by Sec. Dec. to find the
distance from each wire to the centre wire in time at the equator, and the means of
these for each instrument during each part of the longitude are given below. Also for
determinations of these intervals, observations were made of coincidence of each wire in
turn with its reflected image at the nadir, and on one occasion with Transit C, the mark
was bisected by each wire in turn. These last-mentioned observations were reduced by
subtracting the reading for the centre wire from that for each of the others and convert-
ing the revolutions into time with the values of one revolution of the screw given
above. In the following tables the nine vertical wires are denoted by the Eoman
numerals I, II, III, etc., in the order in which a star transits when the instrument is in
the position Micrometer head west.
192 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Wire Intervals. Transit B.
Date
Number Position
of of
Wires.
1902.
Stars.
Instru-
ment.
I.
II.
III.
IV. V.
VI.
VII.
VIII.
IX.
March 19-28 \
s
s
S
s s .
s
s
s
s
and
86
West
14-036
11-239
8-447
5-527
5-621
8-630
u'345
14-109
April 28-May 3 )
> >
87
East
072
239
423
502
6,4
596
329
57
April 6-24.
I IO
West
044
247
421
543
628
623
329
114
>
I 10
East
O/o
213
382
490
636
610
339
08 1
Sept. 22-26 \
and >
141
West
14-040
274
'43'
548 ...
629
620
348
124
Oct. 25-Nov. 4 )
H5
East
076
256
410
'544
612
'593
328
"046
Oct. y-Oct. 22
129
West
06 1
251
412
550
618
'595
317
087
j
124
East
050
231
397
512
633
612
'34'
087
April 14
Nadir Obs.
13-966
242
395
'5>5
649
"604
320
13-981
Wire Interval*.
Transit 0.
Date
Number Position
of of
Wires.
1901.
Stars.
Instru-
ment.
I.
II.
III.
IV. V.
VI.
VII.
VIII.
IX.
March 17-30 \
ftnH '
121
West
s
14-013
8
I I'2I3
s
S'393
s s
5'579
s
5'55 6
s
8-283
s
H'127
8
I4-045
til!' I f
April 27-May 3 J
123
East
013
205
402
598 ...
598
'34
1 7 6
067
April 8-24
110
West
029
*35
399
611
556
288
I 3 I
064
>
I IO
East
OI2
216
'4'3
613 .-
'574
336
147
5 2
Sept. 21-26 \
and \
123
West
13-981
11-226
8-402
5-569
S-SSz
8-279
11-134
14-046
Oct. 25-Nov. 4 '
123
East
14-007
191
387
610
607
344
180
"056
Sept. 2g-0ct. 22
'59
West
006
222
392
573
556
277
125
027
i
150
East
003
195
385
591
600
356
199
O8l
March 5. Obs. of Nadir )
., , , . ,, , f Mean 14-017 11-233 8-399 5'595
March 22. Obs. of Mark ) ' J "
5'577 8-330 11-160 14-032
WIRE- INTERVALS.
193
The simple means of these nine determinations was taken in each case and the
following adopted values for distances from the centre wire are obtained :
Win ( /F).
I.
II.
III.
IV.
V.
VI.
VII.
VIII.
IX.
Transit B.
8
- 14-046
- 11-244
+ 8-609
+ U-333
+ I4-076
Transit C.
14-009
11-215
- 8-397
+ 8-315
+ H-I53
+ 14-052
(3) The value of l nv - of the micrometer screw of the levels was determined in the
following manner. The level was hung in a frame rigidly attached to the tube of the
New Altazimuth, care being taken that the level rested in the same position, as shown
by the cross-level, as when it was used in the longitude observations. The bubble being
brought to a central position, the bubble, the micrometer screw, and one of the vertical
circles of the altazimuth were read. The whole apparatus was then moved slightly, and
the bubble was brought back to its original position by adjustment of the level micro-
meter screw. Comparison of the readings of the screw and circle in the new position
with those previously made gave a value of a revolution of the micrometer screw.
The following are the values found for l div -
micrometer screw :
Level b.
a revolution) of' the level
Level c.
1901, Oct. 4
0-846
1901, Oct. 4 1
113
., ,.
0-830
,, 5
099
1902, July 9
0-840
1902, July 8
089
Sept. 9
0-825
,, 9
090
12
0-827
Sept. 1 1
090
>, '3
0-829
Oct. 17
08 1
,, 17 ^
075
Dec. 16
090
For the reduction of the observations of level made during the longitude, the values
used for l div - of the micrometer heads were :
for level b
for level c
i -09.
(4) The value of l div - of the level scales was determined during and after the
longitude operations by means of the micrometer screw of the level. This value enters
with small effect into the result of the longitude since the level error was usually very
194 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
small, and when large was determined by the use of the micrometer screw whose value
is given in the preceding paragraph. Nevertheless, as it was seen that the value of a
divison of the level scale varied with the length of the air-bubble i,e., with the temperature,
an extensive investigation was made. The level being set on the axis of the transit-
instrument, the air-bubble was made to traverse the scale by steps, after each of which the
micrometer screw head and the ends of the bubble were read. This was done on many
occasions, and the actual readings plotted to form curves for interpolation, and in the
following tables the observed changes of inclination of the air-bubble measured by the
screw, as it occupied the positions indicated by the means of the readings of the ends
of the bubble shown in the first column, are given for different lengths of the air-bubble
shown in the heading. Constants have been added so that the mean reading 45 d of the
bubble corresponds to a level indication of 10" in all cases.
Level b.
Mean
Bubble
[leading.
47 i-,
,.,
54 d '3
,,,
55 d< 3
55 d '4
561-4
561-6
+
571-36
57 d "3
581-3
.,
581-8
581-8
591-2
59 d '9
601-3
6oi- s
6id-o
,,,
34'
2'8o
1 "3 5
35-o
6'O2
...
*..
...
...
...
. . .
. .
-I- 7
O'lO
O'OO
0-40
. . .
. . .
-1-45
0-89
36-0
4-15
o-c8
-t-O"7C
O-QC
-Uo'c?
O'23 4-n-oi
37 -o
2-41
o"6o
1"O7
1-67
1-85
I'CC
J'ICt
J-O*QQ
38-0
0-69
I'AO
I'M
2 ' IO
2-78
2-C C 2"3 ~:
2"I2
~ v yy
2'OI
39"
+0-95
2-16
2-61
2-39
3-01
2-82
2-97
+ 2-90
2-80
3-14
3-52
37 1 ;
3-08
3^3
...
40-0
2-58
3-43
3-8 1
3-25
3-65
4"44 4"z8
3-97
4-11
4-07
4'55
4-00
4-17
4-52
4-73
4-6,
4-40
4-27
4'35
4-27
4-19
41-0
4-14
4-68
5-00
4-60
4-91
5-50 5-30
5-13
5-23 5-22
5-7-;
5-20
5-28
5-46
577
5-66
5-47
5-44
5H9
5'33
4-82
42-0
5-67
5-99
6-21
5-95
6-17
6-56 6-44
6-32
6*40
6-40
6-91
6-40
6-43
6-56
676
6-71
6-58
6-62
6-65
6- 7 I
6-49
6-07
43'
7-I4
7-31
7-45
7-30
7'43
7-66 7-61
7-52
7-57
7-58
7-85
7 -60
7-60
7-70
7-81
7-80
7-70
777
7-77
7-84' 7-65
7-34
44"
8-58
8-65
8-71
8-65
8-70
8-81 8-81
874
8-78
878
8-83
8-80
8-80
8-85
8-92
8-89 8-85
8-90
8-91
8-93 8-82
8-66
45-0
lO'OO
10-00
lO'OO
lO'OO
10 '00
lO'OO lO'OO
lO'OO
10-00
lO'OO
10-00
lO'OO
10-00
10-00
lO'OO
lO'OO lO'OO
lO'OO
lO'OO
lO'OO lO'OO
10-00
46-0
11*41
11-35
11-31
11-35
11-32
11-31 1 1-23
11-29
11-23 11-28
11-25
i rzo
I1'20
11-15
11-10
1 1-15,1 i-i 5
1 1-09
i no
1 1-19 11-18
1 1-36
47-0
12-81
12-70
12-64
12-70
I2'68
12-66
12-53
12-59
12-47
12-58
12-58
12-40
12-40
12-30
12'21
12-33
12-30
I2'l6
12-21
12-36 12-36
12-77
48-0
14-15
14-07
'3 "97
14-05
13-98
13-95
13-86
13-90
13-69
13-87
13-93
13-60
13-62
13-45
I3-32
13-51
13-45
13-22
13-38
'3'54 '3'53
14-04
49-0
15-45
15-47
15-31
15-40
15-31
15-12
15-19
15-20
14-87
15-11
15-32
14-80
14-84
14-60
14-44
14-70
14-60
14-30
14-58
14-70 14*69
15-27
50^0
16-71
16-88
16-65
16-75
16-66
16-26
.6-52
16-47
I6-OI
16-32
16-35
i6'oo
16 -06
575
15-55
15-89
15-77
15-35
15-82
15-89 15-85
51-0
17-95
18-29
...
18-10
1 8 -oo
17-56
17-75
17-10
17-52
17-42
17-20
17-30
16-90
16-67
17-10
16-96
17-02
17-10! 17-02
52-0
19-17
19-72
...
19-45
18-82 ...
18-14
18-70 ...
18-35
18-05 17-79
18-32
18-23
18-32
18-18
53-0
19-86
UrvS-j
I Q'2O I 8*Q2
19-561 lO'^A
1 O *C 7
tn.sfi
54.-Q
. 7
2O'8o
20'8c
20'82 <"> rn
55-0
22-11
...
21-502,18
"7
22-04.
,_ -,-
21-65
CALIBRATION OF LEVEL-SCALES.
Level e.
195
Mean
Bubble
Reading.
6 4 d-z
6 4 d- 3
65<l-o
65-1-5
66 d '3
66*-6
66<J- 7
674-3
6S d -8
69 d 'o
69 d- o
6 9 d-l
6 9 d -6
7 ,d.J
7 ld- 7
7i<-8
7z d 'i
73 d- 7
d
it
n
//
tt
a
If
/-
H
//
//
//
n
//
ft
//
4.1-0
OM4
0-70
'93
I'14
2-25
2-08
0'62
1-86
2-26
2-64
2-I4
I'OO
Z'OO
42-0
272
3'2I
3'25
3'59
4'5*
4-12
3'i8
3 '44
3-88
4-28
4'3S
4-16
3-25
4-00
4-28
4-09
3 '4
43 '
5'3
5-S2
5'55
5-82
6-55
6-09
5-50
S'55
5-88
6-27
6-17
6-02
5-50
6"oo
...
6-17
6'oo
44-0
7-70
7- 7 8
7-86
7-92
8-20
7-98
7-76
7-68
7-92
8-02
8-07
7-96
775
8-00
7-6 3
8-06
7 '94
776
45-0
10-00
10-00
10-00
lO'OO
lO'OO
10-00
lO'OO
lO'OO
lO'OO
lO'OO
lO'OO
10-00
10-00
10-00
lO'OO
lO'OO
10-00
lO'OO
46-0
I2'2O
12-28
I2'II
12-04
12-01
12-09
12-28
12-39
12-40
I2'I I
11-94
12-21
12-25
I2'OO
12-50
I 2 -O2
Iz "43
12-28
47-0
14-36
14-57
14-20
14-18
I4-IO
14-24
14-47
14-81
15-03
14-22
13-87
14-60
14-50
14-00
15-08
14-26
14-99
'4"59
48-0
l6'53
16-94
...
16-42
...
...
16-82
17-25
17-66
I7-30
...
17-67
...
16-96
AQ'O
l8'74
IQ-27
18-72
19-10
19-75
20-38
20-07
IQ'AO
CO'O
2 1 'O4.
2I-62
2 I "06
22-2O
2V'S
>" M
The means of figures in the consecutive columns were then taken in groups as shown
by the subscript figures in the heading of the following tables : .
Level b.
Mean
Bubble
Reading.
47 d- ij
5* d '4:
54 d '94
55 d '94
56 d '96
58 d '6
59 d 'e
6o d 'o 4
6o d - 94
d
ft
ft
ft
//
//
//
40-0
2- 5 8
3'43
379
4-08
4-16
4'34
4'4S
4-28
4-06
41-0
4-14
4-68
5-01
5-21
5'3'
5'45
5'S 1
5"47
5-28
42-0
5-67
5'99
6-22
6-37
6-48
6-58
6-6 1
6-64
6-48
43-0
7''4
7-3i
7-46
7-56
7-62
7-69
773
777
7-65
44-0
8-58
8-65
872
877
879
8-83
8-87
8-90
8-83
45-0
lO'OO
10-00
10-00
lO'OO
10-00
10-00
10-00
lO'OO
lO'OO
46-0
11-41
n'35
11-32
1 1-29
11-25
11-20 ! 11-14
11-13
II'2I
47-0
12-81
12-70
12-67
12-62
12-52
12-41 I 12-28
12-26
12-45
48-0
14-15
14-07
13-99
13-92
13-80
13-63 13-43
13-40 13-5*
49-0
15-45
I5-47
15-29
15-21
15-08
14-85 14-58
14-57 ' 14-81
50-0
16-71
1 6-88
16-58
16-48
16-29
16-00
1573
15-70 16-01
Level c.
Mean
Bubble
<H d '53
6 5 d-6 3
66d- 54
671-6,
6Sd- 43
6 9 <5-2 4
7 d '3
7 id-6 :t
7* d '5:>
Reading.
d
II
n
//
//
//
//
//
It
II
41-0
0-59
1-44
I'S3
I '2 I
I- 7 6
2-01
171
42-0
2-99
3'45
3-82
3'5
3-87
4'01
3-80
4-14
3'9 2
43-0
5-46
5-64
5-92
5-54
5-87
5'99
5-84
6-09
5'9'
44-0
778
7'99
7-91
779
7-8 7
7'95
7'9
7-90 '
7-92
45-0
lO'OO
10-00
lO'OO
10-00
10-00
10-00
10-00
lO'OO
10-00
46-0
I2-2O
12-05
12-19
12-36
12-30
12-13
12-15
12-17
12-24
47-0
14-38
14-16
14-41
'477
14-69
14-30
14-37
H'45
14-61
48-0
17-24
17-46
17-30
17-67
196 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
From the differences of consecutive numbers in the several columns the following
double interpolation tables, which give the values of l div - at different parts of the
scale when the air-bubble has the length given in the heading, were deduced. These
were used in reducing the obervations of level made during the longitude operations :
Value of 1 div -
Level b.
Part of
Scale.
47<-i
5*1-4
S4 d '9
55 d- 9
5 &d '9
58<-o
59 d-
6o d 'o
6o d '9
6i<J' 9
d d
//
,,
/
'/
//, .
...a
II
40-41
56
25
'22
13
15
I I
06
I 9
'22
26
41-42
'53
'SI
21
16
17
13
10
' -17
'20
25
42-43
'47
32
24
19
H
J I
12
13
17
27
43-44
'44
'34
26
21
'7
H
>4
13
18
32
44-45
'4*
35
28
23
21
17
13
10
'7
34
45-46
'4'
'35
32
29
Z5
20
14
'3
21
3 6
4 6 -47
40
'35
'35
'33
27
21
>4
13
24
41
47-48
"34
'37
'3*
30
28
'22
''5
'4
17
27
48-49
'3
40
30
2 9
28
'22
15
17
I 9
*3
49-50
26
'4'
2 9
27
21
'5
IS
'3
20
'22
Level c.
Part of
Scale.
641-5
651-5
661-5
671-5
691-0
70 d- o
7*1-0
73 *-o
d d
it
.//
ft
41-42
2-47
2-25 2-32
2-14
2'OO
2-05
4 2 ~43
2-40
2-26
2-13
2'IO
1-98
1-99
1-99
2-05
43-44'
2-32
2-21
2-01
2-1 )
1-98 ; I-gS
2'O2
2-07
44-45
2'22
2"! I
2'Og
2'08
2-05
2'08 : 2-12
2-15
45-46
2'2O
2-15
2-16
2-18
2-18
2-15
2-2 4
2-36
46-47
2-18
2'2O
2-24
2-26
2'22
2 ' H
2-44
(5) Inequality of Pivots.
The mean level indications, in reversed positions, of the instruments on each night of
observations were compared, and the results are given below. In the first column
is the date, in the second the number (m) of observations of level, by means of the
striding level, Micrometer head W, in the third the number (n) of observations,
Micrometer head E, in the fourth the weight -~^"^ to be assigned to the result in the
& m + n
fifth column, which is one-fourth of the difference between concluded level indications W
and E respectively, and is the correction applicable, positively for the position E, and
negatively for W, to the observed level indications in these positions, due to inequality
of pivots.
INEQUALITY OF PIVOTS.
197
Date.
Tran
,: .tf.
?rt -f- n
W E
TO.
n.
[ransit C.
W-E
m.
n.
2 TO M
4
+ n
4
March 17
"
3
6
4
+ o"i3
18
4
2
3
- 0-09
4
6
S
o-oi
'9
8
5
6
O'lO
...
20 .
2
4
3
+ 0-05
3
4
3
0-07
21
...
...
3
2
2
+ 0-05
22
I
2
i
4- 0-07
5
4
4
0-14
Z 3
6
6
6
O'OI
2
3
2
+ 0-03
2 5
6
5
5
O'OJ
5
5
5
O'OO
*7
...
...
5
4
4
O'l I
28
3
4
3
+ 0-04
5
4
4
O'OZ
April 8
3
3
3
0-09
3
2
2
+ O'22
9
2
i
i
O'Oj
2
3
2
-J- 0*09
10
2
3
2
0-07
...
...
1 1
S
2
3
+ 0-13
12
3
2
2
O'O,
4
5
5
+ 0'15
13
4
6
5
O'lO
...
'7
6
4
5
+ O'OI
3
5
4
+ 0'19
18
4
5
5
-0-14
5
5
5
+ 'i 4.
20
3
2
z
0*05
6
3
4
+ O'2I
21
...
3
5
4
O'O,
22
4
3
3
+ o'o6
...
...
23
5
4
4
O'O2
5
5
5
+ '39
2 4
4
6
5
+ 0-04
4
5
5
0-03
27
...
...
3
4
3
4- 0-06
28
6
6
6
+ o-oi
6
5
5
+ O'OI
May 1
4
6
5
O'OZ
6
4
5
O'OO
2
...
3
5
4
o-i i
3
5
4
4
O'OO
5
4
4
+ 0-03
Weighted
Mean
79
-0-03
93
+ 0-05
Sept. 2 1
4
4
4
+ 0-04
22
4
4
4
+ o'o6
5
8
6
O'OO
4
4
4
4
- 0-09
7 .
4
5
- 0-15
25
z
3
2
+ O'I2
...
...
26
3
4
3
O'OO
6
5
5
+ 0-15
29
...
5
5
5
0'IZ
Oct. z
4
6
5
O'l I
6
3
2
2
O'lZ
...
7
i
4
2
- 0-25
8
2
2
2
4- o-zo
5
7
6
+ 0-04
C^nffKVwrnT
r ORSTSR
VATTO1>
rs. 1902.
2 c
19.8 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Oct.
Nov.
5
ranait
#. con
tmued.
7 ransi
t (J. eontii
ueu.
Date
2 in n
\v - E
-2 m n
w -E
?l.
in 4- ?t
4
-
m 4- n
4
9
2
2
2
+ 0-03
5
5
4
0-07
JO
5
2
3
o 06
7
5
6
0-08
12
...
...
3
3
3
- 0-13
'3
2
I
i
+ 0-07
...
H
4
4
4
- 0-03 7
6
6
o - o6
15
...
4
4
4
4- 0-04
16
5
3
4
0^03
9
5
6
0-08
'7
3
4
3
o 05
7
5
6
O'O,
18
...
...
...
6
5
5
O'l I
21
4
4
4
+ 0-03
7
9
8
4- 0-08
22
4
2
3
- o'o8
6
8
7
0-04
2 5
2
I
i
- 0-13
4
5
4
- 0-15
26
I
I
i
4- O 09
...
...
27
3
2
2
+ 0-13
3
5
4
4- 0-08
28
3
5
4
O'OO
29
7
6
6
4- 0-08
6
5
5
4- 0-03
30
4
2
3
+ o-n
3'
...
...
5
7
6
4- 0-04.
i
i
2
i
O'2O
. .
...
...
2
3
4
3
0-03
8
4
5
4- 0-07
3
2
2
2
+ 0-06
6
8
7
4- 0-09
4
5
3
4
+ 0-09
6
8
7
4- 0'12
66
tf O'OO
'33
0-09
As the apparent level error due to inequality of pivots is thus very small, and as
the method of making observations in the two positions of the instrument on each
night eliminates any such error from the mean result, it has not been considered
necessary to apply any correction for inequality of pivots.
V. CLOCKS.
The clock used at Greenwich was the Sidereal Standard operating on the chronograph
through a relay. The currents obtained from it at every alternate second are used to
actuate a relay from which four independent circuits are derived. One of these iis
appropriated to the seconds' magnet of the transit circle chronograph, another was used
during the longitude operations to give the clock register on the chronograph used by
the French observers, and another to give the clock register on that used by the English
observers. Besides the relay which sends the current every alternate second, the Sidereal
CLOCKS-. 199
Standard also actuates a relay once each minute, and the relay was put in the circuits
which gave the clock registers in order to indicate on each chronograph slip the 2nd
second* of each minute. A clock, Graham 2, set approximately to % Greenwich
Time, was hung in the Transit Pavilion by help of which the assistant marked the
minutes on the slip.
At Paris a clock consisting of a dial plate and pendulum was set up in the observing
room. A galvanic circuit, completed every alternate circuit by the normal clock of the
Observatory, passed through the coils of a delicate relay which stood in the observing
room and also through a pair of contact springs on the pendulum of the clock. The
current passed 1 therefore only when the pendulum of the clock in the observing room
made contact exactly at the same moment as contact was made by the normal clock.
The tongue of the relay completed the circuit which made the clock register on the
chronograph slip, so that the register was actually made by the normal clock of the
Observatory, the beat of the clock in the observing room being synchronous with the
seconds of the normal clock.
VI. CHRONOGRAPHS, &c.
The Chronographs and the electrical apparatus for registering observations and
signals were those used in the determination of the Paris-Greenwich longitude, 1892,
and are described in detail on pp. 1 27 and 1 28 of the account of that work. The
description there given a.nd the diagram on Plate V apply here exactly, except that in
the description the letter ra should be substituted for s, and in the diagram the two
wires attached to terminal s should be considered transferred to m. The "zinc" pole
of the local battery was joined to terminal n, and the "zinc" pole of the main line
battery to k, the " copper" poles of the battery being put to earth in all cases.
VII. METHODS OF OBSERVATION.
The general methods of observation were similar to those adopted in the determina-
tions iu the years 1888 and 1892; described on pp. 23 and 24 of the account of the
former work.. A difference was made in the method of observation of the nadir in this
determination. Additional draw-tubes which had been fitted to the supports of the axis
* During the latter part of the longitude the 6tll second was thus indicated:
200 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
lamps permitted observation with the Bohnenberger with the lamp both on the East and
the West sides of the instrument, and coincidences of the wire with its reflected image
were made with the illuminating lamp East, and illuminating lamp West, when the
instrument was in position Micrometer East and when in position Micrometer West.
In observing the level error with the striding levels, the micrometer screws were
used to bring the air-bubble, after the level had been reversed on the pivots, as nearly
as possible to the same reading of the scale that it occupied before reversal, generally
within one division of the level scale. By this method of observation the mean
level error determined for the evening depends almost entirely on the determined
value of the screw, and inequalities in the value of the level scale are eliminated. The
value of the level error was kept very small, and it was frequently unnecessary to move
the screw.
Observations of Polar stars for determination of Azimuth error were almost always
made by turning the R. A. micrometer to bisect the star, the instant of bisection being
recorded. The only exceptions were in the cases of certain stars which, being more
than 5 from the Pole, were observed as the clock stars over the wires set at the reading
of the R. A. micrometer adopted.
The complete programme for a full night's observations was as follows :
Observation of Mark and Nadir.
I. Micrometer E. 8 Clock Stars, 1 or 2 Polar Stars,
2 or 3 level determinations.
First Exchange of Signals.
If. Micrometer W.8 Clock Stars, 1 or 2 Polar Stars,
2 or 3 level determinations.
Observation of the Mark and Nadir.
III. Micrometer W. 8 Clock Stars, 1 or 2 Polar Stars,
2 or 3 level determinations.
Second Exchange of Signals.
IV. Micrometer E. 8 Clock Stars, 1 or 2 Polar Stars,
2 or 3 level determinations.
Observation of Nadir and Mark.
*
It is of course immaterial if the letters E and W are interchanged in the above
scheme, and generally the first group of Clock Stars was observed in the positions
E and W respectively on alternate nights.
ERROR OF COLLIMATION.
201
VIII. ERROR OF COLLIMATION.
This error was determined by nadir observations, by observations of the mark, and
by observations of the same circumpolar star in reversed positions of the instrument.
In the following tables are given all the results obtained for collimation. In Column
1 is the date and the adopted reading for line of collimation at which the R.A. micro-
meter was left when not in use for nadir or circumpolar observations. Columns 2 and
3 give the name of the circumpolar star and the error of collimation of the middle wire
deduced from observations of that star in reversed positions of the instrument. Column
4 the error of collimation deduced from nadir observations. Column 5 the error of
collimation deduced from observations of the mark. Columns G and 7 give respectively
the difference between the error as determined by observation of the nadir and of polar
stars, and as determined by observations of the nadir and of the mark.
These errors have been divided into groups as shown in the table on p. 218, and the
means of the errors from observations of Polar Stars, from observations of the Nadir,
and from observations of the Mark taken. The adopted Collimation error is given in
the last column.
If the adopted Collimation error in the last column be denoted by c, and x denote
the diurnal aberration viz. : -0"'20 at Paris and -0"'19 at Greenwich, then the whole
Collimation error applicable to observations in the position of instrument West is c + x
and in position East c + x.
Transit B. Paris.
Date
and Adopted
Reading.
Star.
Deduced
Collimation
(I 5 ).
Nudir
Observation
(N).
Observation
of Mark
(M).
N P.
N M.
Adopted
Collimation
Error.
1902.
March 18
io r '35o
March 19
io r- 35o
"
0-29
P20
- 1'93
-0- 4 8
- o-3'
+ 0-4.7
+ 069
+ '-34.
- 0-86
Groombrid^e 1119 ...
...
o'zg
- 098
- 068
- '39
o'o6
0'22
- OM7
- ''25
- 1-16
- 071
- 3-09
0-68 0-21
- ' 55
The wire frame was adjusted for focus botween the observations on March 19 and 20.
202 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Transit B. Paris continued.
Date
and Adopted
Keadiug.
Star.
Deduced
Collimation
(P).
Nadir
Observation
(N).
Observation
of Mark
(M).
N P.
N M.
Adopted
Collimation
Error.
1902.
March 20
lo r '40O
March 2 1
io r '4Oo
March 22
io r '4oo
March 23
io r- 4OO
March 25
io r- 4Oo
March 28
io r- 400
March 29
io r '4oo
//
0-90
+ 0-8-5
+ 1-36
II
+ 0-19
+ 0-19
+ 0-03
it
2'O1
+ r67
+ '93
+ o' 5 8
+ 0-82
+ 0-8 1
//
+ 0-19
0-90
+ IMI
+ 1-62
O'Oj
+ 1-27
+ 0-80
o - o6
+ 0-27
X Ursse Minoris S.P
+ 1-04
+ O'l I
+ '54
+ 0-71
+ 0-31
+ 076
+ 1-13
0-05
0-03
+ '34
+ '34
Cephei 51
+ o'54
+ 0-73
+ 0-15
+ 0-18
+ 0-88
+ 0-85
+ '9z
+ 1-38
+ 0'35
+ 0-66
+ O'20
+ 0-14
0-30
X Ursse Minoris S.P
Groombridge 1119
Bradley 1672
+ 0-64
+ 0-83
+ O'OI
0-16
-f O-22
O'I4
+ Q'25
- 0-81
- 0-68
Polaris S.P
+ 0-03
+ cro6
-075
- 0-25
Transit B. Greenwich.
April 6
io r '400
+ 074
+ '57
0-18
- '35
+ 0-93
. + 0-19
+ 0-66
-0-27
ERROR OF COLLIMATION.
203
Transit B. Greenwich continued.
Date
and Adopted
Reading.
Star.
Deduced
Gollimation
(P).
Nadir
Observation
(N).
Observation
ol Maik
(M).
N P..
N M.
Adopted
Collimation
Error.
1902.
April 8
Polaris S. P
II
4- 0*64
//
4- O-7*
/'
O'2I
//
+ O' I Q
io r '4Oo
+ o-go
+ 0-71
\
9
+ 0-64
+ 075
0'2 I
4- 0*1 1
+ 0-96
April q
4- O'72
4 nc
io r '4Oo
4- 0-52
+ 0-62
4- 1-15
- o-53
April i o
4- O'C
+ I'^r
io r '4oo
+ '57
4- i'4 2
(
+ o'55
+ ''39
0-84
April 1 2
+ o'oc
+ 1'IQ
i 0^400
+ 0-43
+ '45
+ 0-67
+ 0-31
4- 0-93
0-62
April 1 3
+ O*CQ
io r- 4OO
+ 0'22
+ 0-29
+ 0'36
w >y
4- 0-94
+ 1-24
4- 0-29
+ 0-92
0-63
April 1 5
-4- O'lo
-1- O'7O
0*60
April 1 6
+ 0-26
4- o'4C
O'lQ
April 1 7
io r '4Oo
Bradley 1672 .
i '04
+ 0-19
+ o'o8
+ 0-93
4- 0-31
+ 0-52
1*04
4- 0-19
4- 073
+ i'23
- '54
204 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GKKENWICH, MADE IN 1902.
Transit B. Greenwich continued.
Date
and Adopted
Reading.
Star.
Deduced
Collimation
(P).
Nadir
Observation
(N).
Observation
of Mark N P.
(M).
N M.
Adopted
Collimation
Error.
1902.
April 1 8
io r- 4oo
April 19
io r- 4OO
April 20
io r '4OO
April 2 1
io r '4oo
April zz
io r '4Oo
April 23
io r '4oo
April 24
io r '4OO
Bradley 3147 S.P
I '01
- 2-82
+ 0-03
+ 0-13
+ 0-18
+ 0-16
+ 0-34
+ 2'03
+ I'39
+ 0-56
+ 079
/'
- 0-14
o p 6;
0-42
O'l I
+ 0-19
o - o6
- '54
0-36
+ ''9
Bradley 1672
- 1-92
+ o-n + 0-25
CT20 -1- 0-45
O'20 + 0-29
0-18 -f 0-16
0-19 + 0-23
OI3 O'O2
Bradley 3147 S.P
I '00
2 '02
021
O'O2
0-06
Polaris S.P
Bradley 3147 S.P
- 1-5I
O'l 2
0-06
0-80
o'gi
- 0-66
O'22
O'l6
- 0-32
+ 0-27
+ '34
001
2 Ursae Minoris S.P
Polaris S.P
Bradley 3147 S P
-0-79 -023
+ '3i
I'22
1-4!
- f23
0^6
- '49
0-41
-o-35
- 0-17
+ 0-04
Bradley 1672
2 Ursse Minoris S.P
Polaris S.P
I -21
0-42
0-06
Transit B. Paris.
April 28
(morn.)
IO r '4<DO
April 29
io r '4oo^
Bradley 3147 S.P
+ 0-92
+ 0-94
+ '55
+ 0-80
+ 077
+ 0-61
+ O'OI
+ 0-04
o-io
0'07
+ 0-75
+ 0-46
O'OI
2 Ursie Miiiuris S P
Polaris S.P
D
+ 0-80
+ 73
O'O2
+ 0-48
+ 0-02
Between the observations on April 22 and 13, tlie object glass was taken oil' and replaced.
ERROR OF COLLIMATION.
Transit B. Paris continued.
205
Date
and Adopted
Reading.
Star.
Deduced
Colli mation
(P).
Nadir
Observation
(N).
Observation
of Mark
(M).
N P.
N M.
Adopted
Collimation
Error.
1902.
May i
io r '4oo
May 3
io r> 4oo
2 Ursse Minoris S P
+ 0-68
-f 0-26
4- o'6o
+ 0-6 1
0-19
+ O'2I
H
+ o'H
/'
+ o - 6o
+ '47
o-o i
Polaris S P.
+ '47
+ 0-61
+ O'O I
+ 0-31
+ 0-51
- 0-27
+ 0-IJ
+ 0-41
o - o6
Transit B. Greenwich.
Sept. 2 1
Sept. 22
Sept. 23
Sept. 24
Sept. 25
Sept. 26
Tiazzi IX 37 S.P .
+ 0'J2
0-16
- 0-15
ro2
0-19
O'22
+ 0-17
- 0-68
0-14
O'24
+ 0-40
0-07
+ 0-16
+ 0-27
+ 0-58
+ 0-57
+ 0-6 1
- 0-25
Cephei 51 S P
+ 0-52
o'i6
-0-32
- 0-68
0-26
+ 0-19
0-30
o - 4o
0^46
O'56
076
X Ursse Minoris ...
Bradley 3 1 47
- 0-25
- 0-39
-0-66
0-61
Cephei 51 S.P
O'O2
+ 0-07
+ 0-25
O'OO
0-04
- '34-
- 0-14
- 0-08
- 77
0-76
Groombridge 1119 S.P....
Bradley 1672 S.P
X Ursae Minoris
+ 0-05
0-19
- o-77
- 0-68
0-50
O'22
o-.i6
076
Groombridge 1119 S.P....
X Ursae Minoris
- 'S9
0-19
076
+ 0-26
o - 3o
- 0-51
+ O'lO
0'2I
0-26
0-07
o'8i
076
Groombridge 1119 S.P....
Bradley 3 147...
Bradley 16728.?
O'l I
- 0-18 079
GREENWICH OBSERVATIONS, 1902.
2 d
206 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Transit B. Paris.
Date
and Adopted
Reading.
Star.
Deduced
Collimatiou
(I 1 ).
Nadir
Observation
(N).
Observation
of Mark
(M).
N P.
N M.
Adopted
Collimation
Error.
1902.
Sept 20
'
//
+ 0-12
II
O'Z^
//
//
//
CT2C
+ 0'12
0-23
+ 0'35
Oct. 3
Groombridge 1119 S.P....
+ 0-33
+ 0'45
CT20
+ '33
+ 0'45
CT20
+ O-I2
+ 0-65
i
Oct 6
O'OO
o-oc
...
+ 0-57
+ 0-29
O'O5
+ 0-34
Oct. 7
Bradlev 3 14.7 ...
+ O-27
076
O'lQ
Bradley 1672 S P
+ O'll
+ O'O2
,
+ 0-24
...
+ 0-29
OM7
O-I9
0^6
+ 0'O2
Oct. 8
Bradley 3 1 47
O 4 I2
0-45
o'4.c
...
-0- 4 8
- 77
- o-74
0'12
-0'47
0-65
-o-35
+ 0-18
Oct o
0-48
O'AQ
- '35
-0-42
- 0-49
+ 0-07
Oct 10
Groombridge 3548
O34.
o'?4
o'lq
Bradley 1672 S P
O'32
O'C*
- 0-72
- o'33
-0-53
0-19
O'2O
- '34
Oct 1 1
O'Sl
O'CO
0-03
Oct. 1 2
o'co
076
+ 0-26
,
ERROR. OF COLLIMATION.
Transit B. Paris continued.
207
Date
and Adopted
Reading.
Star.
Deduced
Collimation
(P).
Nadir
Observation
(N).
Observation
of Mark
CM).
N P.
N M.
Adopted
Collimatiou
Error.
1902.
Oct 13
-
O'*2
O4.I
//
//
//
O'ZC
...
-o-35
- 0-34
-0-41
+ 0-07
Oct 14
Grootnbridge 3548
-4- o'j?
OMl
O'C7
Bradley ? I d.7
-i- o'i i
0-28
Bradley 1672 S.P
O'OI
O'lO
+ '*5
- 0-27
-0-57
-0-52
+ 0-30
Oct 15
O'l 1
O'J. I
- 0-35
0-24
o'4-i
+ 0-17
Oct 1 6
Bradley 1672 S P
4- o'la.
O'3 I
O' I I
+ O'2I
0-38
+ 0-18
- '35
cri i
-0-53
-0-24
Oct. 17
Bradley 314.7...
+ 0-87
+ O'I2
O'CO
Bradley 1672 S.P
+ 0-16
+ 0-26
0-28
-f- O'O2
+ O'OI
+ 0'43
0'O5
-0-25
-0-48
+ O'2O
Oct. 1 8
O'64
O'4Q
0-I5
Oct. 2 j
- 0-68
O'^O
0'2I
- '5S.
0-48
0-30
0-18
Oct 22
Polaris
0*34.
O's4.
o-ce
- 0-48
- '59
- '34
-0-54
-0-55
0'2O
+ O'OI
208 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Transit B. Greenwich.
Date
and Adopted
Reading.
Star.
Deduced
Collimation
(P).
Nadir
Observation
(N).
Observation
of Mark
(M).
N-P.
N M.
Adopted
Cullimation
Error.
1902.
Ocfc 25
2 Ursus Minoris
'r
+ I'I4
OM4.
*/
0-8?
n
"
O'2C
+ 0-31
- 0-49
+ i''4
+ 0-08
- 0-68
i -06
+ 076
Oct 26
O'I2
0*41
O'22
- 0-17
- o- 4 i
+ 0-24
Oct 27
Polaris
+ 0-81
O'o6
o'4-4
0-89
+ '38
Oot 29
Bradlev 3 IA7 .
O"2Q
O'OQ
o-q8
Bradley 1672 S.P
I*O*
-t- O'O?
+ 0-07
- 0-66
o-oo
-0-58
+ 0-66
+ 0-58
Oct. 30
Bradley 2003...
O'OZ
0-17
- 0-86
OM I
O'02
- 0-14
- 0-86
O'I2
+ 072
Oct. 3 1
O'CK
0-58
+ c '53
Nov. i
Bradley 2993
l"\Z
O'2A
0-76
0'2O
- ' - 3*
O-22
076
+ I'lO
+ '54
Nov. 2
-f- O'I2
- o-;8
0'2I
o'o;
0-58
+ 0'53
Nov. 3
Bradlev 2001
O'7C
O'OJ.
+ 0-71
Nov. 4
Bradley 3147
+ 0-08
O'O2
o'?4
Bradley 1672 S.P. .
0-18
O'OA
2 Ursse Minoris
+ o';o
0'2?
'39
Polaris
O'23
+ 0-04
o-io
- 0-37
0-14
+ 0-27
ERROR OF COLLIMATION.
209
Transit C. Greenwich.
Date
and Adopted
Reading.
Star.
Deduced
Colliinatioii
(P).
Nadir Observation
Observation of Mark
(N). (M).
N P.
N M.
Adopted
Colliination
Error.
1902.
March I 5
,
O'O2
"
"
4- o'l f
March 1 6
+ 0'08
io r -o8o
...
+ 0'08
+ 0'08
March 17
io r< o8o
A. Ursse Minoris S.P
Bradley 3147 S P
- 1-50
- 1-18
O-O2 -f- 0^69
0-24 + o'3i
- ''3 +
0-13 -f- 0-50
+ I '2 I
0-63
March 18
+ O'J. 4- O'QC
O'C I
March 19
io r 'o8o
\ Ursse Minoris S.P
Grootnbrid"e 1119
- 0- 39
CTOA
+ 0-05 -f 1-28
O'U
O - 22
0-03 + 1-28
+ 0-19
- 1-31
March 20
A UrsaB Minoris S P
0-16
0*26 + 1-26
io r 'o8o
o'zo + '44
o'i6
0-23 + 0-85
0-O7
I -08
March 21
io r 'o8o
A. Ursse Minoris S.P......
- Q'53
1
o - 36 + 1-07
-0-33 +0-39
-0-53
-0-35 +073
+ 0-18
I -08
March 22
Bradley 2993 S.P
( - 070
0'22 4- 0-56
0-12
io r -o8o
I - '4
-0-55
0'17 + 0-56
+ 0-38
- 073
March 23
io r- o8o
O'22 + 0^84
0*26 -)- o'66
0^92
V
210 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Transit C. Greenwieli continued.
Date
and Adopted
Heading.
Star.
Deduced
Collimation
(P).
Nadir
Observation
(N).
Observation
of Mark
(M).
N P.
N M.
Adopted <~ a
Collimatioiij
Error.
1902.
March 24
io r -o8o
March 25
io r> o8o
March 27
io r -o8o
March 28
io r- o8o
March 29
n
0-03
+ 0-42
//
0-64
-0-45
-0-25
- '4S
-0-99
- 1-16
- 1-05
0-98
+ 0-15
X UrssB Minoris S.P
0-62
+ '97
+ 0-69
- 0-27
CTO2
- 0'57
+ 079
-f- 0-60
Bradley 2993 S.P
Bradley 3147 S.P
Bradley 3147 S.P
+ '35
0-29
+ 070
+ '3*
+ 0-04
+ 0-07
O-JO
+ 0-62
+ i'43
Bradley 3147 S.P
+ '3 2
- 0-13
+ i "03
O'lO
0-18
- 0-41
0-41
- '39
+ roz
4-0-38
OMO
- '35
+ 0-70
- - 34
+ 0-64
Transit O. Paris.
April 7
April 8
Bradley 3147 S.P
+ 2-64
0-30
O-2O
o - z4
+ 0-63
+ 0-58
0-16
+ 0-23
2-89
- 1-91
-0-57
- 0-66
+ 0-15
Bradley 3147 SP .....
+ 2-64
- 0-25
+ 0-32
+ '43
0-60
0-6 1
0-23
+ 0-31
4- 0-06
+ 0-17
+ i '43
0-48
+ 0-18
ERROR OF COLLIMATIOX.
211
Transit O. Paris continued.
Date
and Adopted
Heading.
Star.
Deduced
Collimation
(P).
Nadir
Observation
(N).
Observation
of Mark
(M).
N P.
N M.
Adopted
Collimation
Error.
1902.
April
Bradley 3147 S.P
O'lO
//
0-60
o-ic
"
//
+ 0-15
+ O'OI
+ '43
O'OI
o-io
'3Q
+ 0-09
O'ZO
-0-39
April 1 1
Bradley 2993 S.P
+ o-sS
O'4i
"
+ 0-64
Bradley 1672
+ I'12
O'^O
O'OO
+ 0-81
+ 0-8;
0-24
+ 073
1-09
- Q'97
April i 2
+ 0-16
+ O'QC
0-08
+ '4
+ 0'95
0-91
April 13
Bradley 2993 S.P
Bradley 1672. .
+ I'57
-4- o*c?
O'lO
071
O'ld.
+ 0-84
+ 0-69
+ 0-68
+ 1-05
o'38
+ 074
- 1-43
I'I2
April 14
o'j.6
+ 0-61
+ 0-67
...
0-46
+ 0-64
no
April i c
O'?7
4- O'C7
I'I4
April 1 6
4- o*co
...
+ 0-39
+ '45
April 17
Bradley 1672
+ O'7I
O'Q?
4- 0-4.6
Polaris S.P
4- 0*84
O'Si;
+ 0-70
0-48
+ 071
+ 078
-0-75
+ 0-65
- 1-53
1-40
April 1 8
Bradley 3147 S.P
+ I'23
O'72
4- 0*47
Bradley 1672
+ CTQO
O'67
-1- O'3 I
o'6i
+ 0-27
+ i '07
0-67
+ 0-35
- 174
I '02
212 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE TN 1902.
Transit C. Paris- continued.
Date
and Adopted
Reading.
Star.
Deduced
Collimation
(P).
Nadir
Observation
(N).
Observation
of Mark
(M).
N P.
N M.
Adopted
Collimation
Error.
1902.
April 19
April 20
April 2 1
April 23
April 24
- 077
+ '39
//
- i-79
- 1-18
- 1-42
0-58
//
- 1-16
- 1-08
'83
0-85
-0-49
+ 0-15
Bradley 31478?.
+ 178
+ 1-05
+ 0-62
072
- '55
+ 0-18
+ 078
+ 0-37
2 Ursse Minoris S.P
Polaris S.P
Bradley 3147 S.P
+ 1-15
0^64 + 0-44
+ 0-67
.+ 0-67
-o'57
- '44
+ Q'3 1
+ o'35
+ '3i
Polaris S P
Bradley 1672
-I- 0-67
-0-51 +0-32
| + 0-97
1 +0-56
(-1-23*)
o'54
076
+ 0-07
+ '39
+ 0-15
Polaris S.P
Bradley 1672
+ 077
0-65
+ O'2O
+ '37
+ 0-25
o'4o
o - i6
0-19
- o'33
+ 0-36
+ OM9
+ O'lO
Polaris S.P
+ 0-31
- 0-27
+ 0'22
Transit G. Greenwich.
April 27
April 28
Bradley 2993 S.P...
+ ''94
+ i'9'
+ i'53
+ O'Ol
+ 0-18
no
ro6
- 79
1-69
- 176
+ ro8
+0-91
+ 0-15
2 Ursa Minoris S.P
Polaris S.P
Bradley 2993 S P .
+ 179
+ o-io
0-98
+ i'97
+ 176
0-05
+ Q'i3
+ '44
0-08
1-27
0-42
070
Polaris S.P
+ 1-87 + o-ii
o'8o
This Collimation Error from Polaiis depends upon s-ix bisections during a 1 reak in clouds, and has not been included
in the mean.
ERROR or COLLIMATION.
213
Transit C. Greenwich -continued.
Date
and Adopter]
Reading.
Star.
Deduced
Collimation
(P).
Nadir
Observation
(N).
Observation
of Mark
(M).
N P.
N M.
Adopted
Collimation
Error.
1902.
April 30
May i
May 2
May 3
It
+ o-oi
0-08
//
I'OO
-1-63
1-64
- 1-15
+ 0-96
+ I'04
+ I'22
+ 0-95
//
Bradley 3147 S.P
Polaris S.P
o'04
i-oo
I + 2-08
1 + I-S8
+ 17
+ O'22
+ 0'2I
+ 0-28
0'08
- 0-80
0-98
- 0-86
Polaris S.P
+ 179
+ 0-16
- 0-88
+ '-89
+ 0-35
+ 'i5
0-98
0-96
Polaris S P
+ 1-89
+ 0-25
- '97
+ I '60
+ 0-90
+ 0-27
- 0-15
+ 0-19
ro2
o - 6o
0-92
Groombridge 2283
+ 1-25
+ O'lO
0-85
Transit C. Paris.
Sept. 21
Sept. 22
Sept. 23
Groombridge 1119 S.P...
A Ursse Minoris
o-oo
- 0-13
0'38
+ 0-22
+ 17
+ 1-22
+ I-I3
o-io
- I'45
+ 0-39
o-oo
o-io + 1-35
+ 0-56
+ 0-86
+ i -08
O'l I
O'l I
O'l 1
+ o'04
4- 0-04
+ 0-28
Groombridge 1 1 19 S.P...
Bradley 3 1 47 . . .
+ 0-83
O'll
+ O'I2
- o 94
o 23
0-26
0'12
+ 0-14
May i. The Collimation Error from Bradley 3147 S.P. was obtained from double reversal of the instrument.
September 2Z (morning). An alteration was made in the uprights of the reversing gear, the lifting Y's being slightly
lowered, so as to leave more clearance between them and the axis of the instrument.
GREENWICH OBSERVATIONS, 1902.
2 e
214 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Transit C. Paris continued.
Date
and Adopted
Reading.
Star.
Deduced
Collhua'ion
(P).
Nadir
Observation
(N).
Observation
of Mark
(M).
N P.
N M.
Adopted
Collimatiou
Error.
1902.
Sept. 24
Sept. 26
Rradlpv 1 1 J.7
+ 0-86
+ 0-99-
'*
0-16
0-19
+ 0-15
+ 0-16
- 33*
+ 0'33
//
I'OO
0*90
//
0'12
+ 0-16
+ 0-39
Bradley 2993
-Ko-93
0-07
+ 0-05
+ 1-05
+ 0-65
4- I'OO
+ 1-05
+ O'lO
0-18
+ 0-19
o-io
+ 0-02
-0-37
0-04
Rradlev <Id.7
Bradley 1672 S P
+ 0-94. + 0-04
O'l 2
Transit C. Greenwich.
Sept. 29
Sept. 30
Oct. i
Oct. 2
Oct. 3
Oct. 7
X Urse Minoris
+ 0-27
+ no
o'o8
O'O7
+ I'OO
+ 0'29
- 077
0-25
- 73
0-84
- 0-68
- - 32
0-05
+ 0'39
Bradley 2993
+ 0-69
0-08
+ 0-6)
0-05
+ 079
+ O-QI
+ 0-99
+ 0'39
Groonibridge 354^
+ O'OI
+ '69
0-22
+0-89
+ 0-05
4-cri3
+ '37
+ 0-44
Bradley 2993
+ 0-34
+ o 09
+ 0-4.1
+ 0-04
"
+ Q'i9
- 0-13
+ 0-60
+ 0-19
+ 0-24
* This was an observation of the scale.
EUROR OF COL.LIMATION.
215
I'ratwit 0. Greenwich "ontinued.
Date
ami Adopteil
Reading.
dtar.
Deduced
Collimatioii
(P).
Nadir
Observation
(N).
Observation
of Mark
(il).
N P.
N-M.
Adopted
Collimation
Error.
1902.
Oct. 8
Grootnbridge 11198.?...
I'radley 2993
+ 0-47
+ 0-1:6
+ o 1 6
+ 0-39
+ o'?6
//
"
4-0-39
P.radley 31478.?
+ 0-48
0-07
4- 0-50
+ 0-05
+ 0-38
-0-45
- o-33
Oct. 9
Briillev 2QQ3
-1- O'74.
O'3O
+ o - ;8
o'ig
+ o'go
+ 74
- 0-25
+ 0-64
-0-99
0-89
Oct 10
Groombrid fr e 3548
O'Q2
+ o - o8
4- OM4.
Bradley 3147 S P
-f o-io
o'o6
+ 0-08
Bradley 1672 S P
4- O'14.
+ O'I2
+ o - c7
O'I3
+ 0-OJ
+ 0-33
4-0-18
- 0-28
Oct. 1 1
+ 0-17
+ 0-83
-0-66
Oct. I 2
Groombridgc 3548
+ 0'08
+ O'2O
+ 0-07
+ 0-58
+ 0-29
+ 0'08
+ 0-14
+ '44
4- 0-06
0-30
Oct. 1 3
+ ''7
Out. 1 4
Bradley 2993
+ 0-56
+ Q'O4
4- 076
Bradley 114.7 ..
+ 0'2I
4- O'I2
+ o - 6o
CTO2
+ 0-53
+ o 39
4- 0-05
+ 0-63
-o-34
- 0-58
Oct 1 5
Bradley 2993 .
4- 0-8 i
+ 'I l
4- O'6o
Bradlpv 314.7
4- 0-07
O'OI
j
Bradley 1672
-r 1 -24.
+ O'l C
4- o'6o
4- roi
+ 0-09
4-0-65
0-92
0-56
Oi-t 1 6
r>radlev 200? . .
4- 072
+ 0'?Q
4- 0-44
Bradley 3147
Bradley 1672 S.P
+ 072
+ 0-85
+ 0-38
+ '35
4- 0-43
+ 076
-H 0-37
4- 0-44
- 0-39
0-07
216 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Transit 0. Greenwich continued.
Date
and Adopted
Reading.
Star.
Deduced
Collimation
(P).
Nadir
Observation
(N).
Observation
of Mark
(M).
N P.
N M.
Adopted
Collimation
Error.
1902.
Oct. 17
Oct. 1 8
Oct. 2 1
Oct. 22
Bradley 200? ..
II
4- 0-68
+ '4 2
+ 0-26
O'i I
+ 0-62
+ 0'55
- '47
0^9
078
- '"44
f
- 0-51
0-46
0*42
0-80
a
+ o'39
Bradley 314.7 ..
Bradley 2003
+ 0-55
+ =-08
+ '59
+ 0-68
+ i-4
+ 1-01
+ '33
0-04
+ 0-6 1
Bradley 3147
Bradley 1672 S P.....
Bradley 200?...
+ 1-04
+ 0-15
+ 0-61
+ 1-03 -f 0-16
+ i'o6 + o'oi
+ 0-92
+ o - 6o + 0-20
+ 74
+ 0-39
+ 0-48
Bradley 3147...
Bradley 1672 S P
Polaris
Bradley 3147 ..
+ 0-90
+ OM2
+ '54
+ ,-42
+ 1-61
+ i'35
4 O* I J.
+ 77
+ 0-86
Bradl-y 1672 S.P
O'lO
Po'aris
+ 1-46
-f O'O2
-f o 82
1
Transit C. Paris.
Oct. 25
Oct. 26
Oct. 27
Bradley 3147...
+ '35
+ 2-18
+ I '06
+ i-55
+ 0-88
+ '-13
+ '04
cri6
+ '3
+ 0-16
O'l 1
+ i-57
Polaris
+ i '27
+ 1-31
-j- roi
+ o-?'i
+ 1-40
+ 1-30
+ 1-26
+ 0-80
Bradley 3147
...
...
+ 1-19
+ i "03
+ '-43
+ i'55
+ 1-26
+ 1-40
+ i '40
+ ''47
Bradley 1672 S.P. ..
+ 1- 49
+ ''33
+ >'44
ERROR OF COLLIMATION.
217
Transit G. Paris continued.
Date
-'aid Adopted
Heading.
Deduced
Star. Collimation
(P).
Nadir
Observation
(N).
Observation
of Mark
(M).
1
N P.
N M.
Adopted
Collimation
Error.
1902.
Oct. 28
liradley 1672 S P + 2-03
+ o'8o
+ I '47
"
"
+ ''57
+ i'3
+ 1-51
+ z'3
+ 1-05
+ ''49
- 0-98
- '44
Oct 29
Bradley 3147 + 2-13
4- I'M
+ r?8
Bradley 1672 S.P 4- i '67
4- i"?8
2 Ursse Minoris 4- 2'zo
Polaris -4-2*17
4- r??
+ i '48
4 2-04
+ i-35
+ i'43
o'6g
0-08
Oct. 3 1
Bradley V47 + 2 '4^
+ i '48
+ I'lO
Bradley 1672 S.P 4- 2-56
2 UrsEe ^linoris 4- 2 - i6
Polaris ... -f- 2*03
+ 1-^6
-1- r^o
+ 2-31
+ i"5 2
4- I'2O
- 79
4- 0-32
Nov. 2
Brndlcv 1672 S.P 4- 2 - O2
+ 1^6
+ i'^3
2 Ursfe Minoris -+- i j g6
Polaris + 2 ' i i
4. I-cr
4- i"3Q
+ 2'03
+ 1-56
+ i'4 6
- '47
4- o'lo
Nov. \
Bradley 3147 -(- i '97
+ 1 'I t
4- r^
liradley 1672 S.P 4- 2^43
Polaris... ... 4- 2 ' 2 5
4- l '20
-h I 60
+ 2'22
+ 1-22
+ i 51
roo
O'2g
-
>Jov. 4.
Bradley 3147 + 2*17
4- 1-48
+ I'?*
Bradley 1672 S.P +221
4- 1-32
Polaris .. +2*13
-I- I '14.
4- i'37
I
+ 2'17
-,- .-38
+ i-45
- 079
0-07
The following table gives the means of the figures in Columns 3, 4 and 5 of the
above taken in groups as shown by the dates in Column 1. Weighted means of two or
more of these groups are taken as shown, and the weighted mean of these three results
from observations of Polar Stars, Nadir and Mark has been adopted as the Collimation
Error for the period to which it refers, and is 'given in the last column of the preceding
table.
218 .TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Transit D.
Reading
Pol
ar Stars.
J
'adir.
,]
lark.
Date.
Station.
Micrometer.
No. of
Obs.
Error.
No. of
Obs.
Error.
No. of
Obs.
Error.
1902.
Mar i"8 19
Paris
r
lo'ico
0-68
5
</
0-23
8
- ,:,,
Mar. 23 28
Paris
io'4-oo
6
+ 0'42
15
+ '59
14
O'H
Apr 813
Greenwich
I
+ 0^64
16
+ '49
12
+ 0-28
17 22..
Greenwich.....
e
- 1-58
i 3
+ 0-02
10
+ 0-32
J J
Weighted Means
)
12
- '39
44
+ 0-39
36
+ 0-14
Aur 23 24.
Greenwich....
10-400
7
1-03
6
0-27
4
+ O'I2
Apr. 28-May 3
Paris
) J
5
+ o 67
8
+ 'S9
8
O'O2
Weighted Means
) J
12
0-32
>4
+ O'22
12
+ 0-03
Greenwich .
I O'J.4.0
I C
O'l I
H'
O'2C
1 I
0-60
2Q-Oct. 14.
Paris
9
+ o-io
2 1
0'2C
13
- '43
Oct 1C 22 . ....
Paris
6
-f- O'22
14
0-36
0-34.
Oct. 25-Nov. 4
Greenwich
J J
1 1
O'l 2
'9
- 0'08
I I
- 0-57
Weighted Means
J >
4 1
o-oz
68
0-23
4 2
0-50
Adjustment of the wire frame for focus was made between March 19 and 23.
The object glass was taken off and replaced between the observations on April
22 and 23.
Transit G.
Date.
Station.
Reading
of R.A.
Micrometer.
Polar Stars.
Nadir.
Mark.
No. of
Obs.
Error.
No. of
Ol>s.
Error.
No. of
Obs.
Error.
1902.
Mar. 1529
Greenwich
Paris
r
IO'O8o
)
)
'3
T 9
IO
0*30
+ 0-93
+ 1-70
28
35
'7
- 0-17
- 0'44
+ O'l 2
!9
4
'5
+ 75
+ 0-41
o'Sg
Aor 724.
Anr 27 Mav 1 . .
Greenwich
Paris .
Weighted Means
Sept. 21 26
j
42
+ 073
80
- 023
74
i- 0-23
IO'08O
I t
) )
IO
12
20
+ 0'8o
4- o 33
+ 0-91
"3
'9
18
- 0-13
+ 0-03
+ 0-13
H
'9
16
+ 0-30
+ 0-50
+ 0-60
Sept. 29-Oct 13
Oct 14 22
Greenwich ....
Greenwich
Paris
Weighted Means
Oct. zj-Nov. 4
j j
4*
+ 0-72
5
+ 0-02
49
+ 0'4 8
IO'080
22
+ 2 '01
21
+ i'3 2
18
+ i-3*
ERROR OF LEVEL.
219
X. LEVEL-ERROR.
The Level-Error was determined several times during each set of observations by
the striding level, and at the beginning, in the middle and at the end of each evening's
work by the Nadir observation. In the latter determination the pivots were assumed
sensibly equal, and the simple difference of the readings of the R. A. micrometer for
coincidence of the middle wire with its reflected image in reversed positions of the
instrument was considered to be twice the error of level. The difference between the
level error as found from nadir observations and with the striding level is shown in
the following table ; Columns 2 and 3 are found by taking the mean ( ) of the level
errors determined by the striding level in positions West and East, and subtracting this
mean from the mean (N) of the errors determined by nadir observation on the same
evening.
Date.
N--
P + E
Date.
,-!
r + E
2
2
Transit B.
Transit C.
Transit B.
Transit C.
Parix.
Greenwich.
Paris.
Greenwich.
1902.
H
1902.
March 1 7
+ 0-51
April 27
0-04
18
0^04
28
+ 0'02
- 0-25
'9
+ 0-39
- '39
May i
-f 0'2I
0-36
20
0-08
2
- 0-19
21
- 0-17
3
o'O7
- 0-27
22
+ 0-6 1
+ 0-38
23
+ 0-33
- 0-27
25
+ o'6o
+ 0-03
27
28
+ 0-68
+ o-oi
0-36
Greenwich.
Paris.
Sept. 21
+ '49
Greenwich.
Paris.
22
0-26
4- 073
24
+ 0-08
- o'S4
April
0'22
+ 0-06
25
O'og
9
0-24
0-36
26
+ 0-15
+ 0-28
10
+ O'lO
1 1
0-04
12
+ 0-08
13
17
+ 0-08
0-07
- 0-18
+ Q'3 1
Paris.
Greenwich.
18
O'OZ
O'20
20
- '35
o'54
Sept. 29
.. .
o'ig
21
- 0-15
Oct. 2
- '4S
22
0-63
...
6
0-30
23
0'02
- 0-23
7
- 74
24
-|~ o ' 1 9
- 0-44
8
+ 0-16
- 0-23
220 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Level-Error continued.
N W + E
N W + E
2
2
Date.
Date.
Transit B.
Transit C.
Transit B. Transit C.
Paris.
Greenwich.
Greenwich.
Paris.
1902.
"
1902.
"
lf
Oct. 9
+ 0-29
o'i6
Oct. 25
- '39
0-38
10
O'O2
O'lO
26
+ O'OI
12
O'2O
27
+ 0-14
- '39
'3
Ol
28
+ o - o6
'4
0-28
0-08
29
0-29
- o'44
'5
+ 0-I5
3
+ 0-08
16
- 0-68
O-OQ
3'
- 0-17
i?
O'OI
+ 0-37
Nov. i
+ 0-62
18
+ 0-04
2
+ 0-04
o'24
21
- 0-37
+ 0-08
3
+ 0-14
- 071
22
+ 0-14
O'OI
4
+ 0-17
- '49
The following tables give the individual level determinations made with Transits
B and C respectively, together with the Adopted Level-Error found by giving a weight
of 2 to each nadir observation and a weight of 1 to each determination with the
striding level during the evening :
Transit B.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
W
E
W
E
Pari<s.
Paris.
1902.
Mar. 1 8
h in
7 12
"
+ 75
"
"
1902.
Mar. 1 9
h in
7 27
- 5 -I 9
"
'
//
7 27
+ I'20
7 44
- 5 '49
7 34
+ 1-26
8 12
- 5-46
7 5'
10 40
+ 0-50
+ 0-69
+ 079
8 30
8 45
- 5'43
-4-50
u 15
+ 0'8o
9 3 1
6-40
- 5 '6i
1 1 40
+ 0-27
9 39
6-05
Mar. 1 9
6 30
- V 26
9 47
10 37
6'o i
-6-15
6 48
- 4'39
10 59
- 5'9S
7 o
- 5-12
ii 9
- 5'9 2
ERROR OF LEVEL.
Transit B. continued.
221
Date.
Si.lereal
Time.
Striding Level.
Na.lir.
Adopted
Level
Error.
Date.
SMereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
W.
E.
W.
E.
Paris continued.
Paris continued.
1902.
h m
"
"
"
"
1902. I h m
"
"
"
Mar. 1 9
II 20
- 5'43
Mar. 2 5
8 32
- 3'54
12 I
- 674
9
- 4'4i
12 12
6-92
9 10
- 4'39
- 4'36
9 38
- 5'57
9 55
- 4'55
Mar. 20
6 10
4-62
10 32
- 4'59
6 40
5-80
10 41
- 4-90
6 50
6-30
10 54
5-08
7 12
- 6-08
- 5'57
ii 20
- 4-83
7-28
6-00
ii 30
- 5-52
7 48
- 5'43
12
- 4-66
7 54
- 57"
-
Mar. 28
10 55
ro8
I
Mar. 2 i
8 50
- 4-20
I I 12
0-87
r
ii 45
- i'75
12
- 176
Mar. 22
6 40
- 4-28
12 37
2'I I
- i -67
7 o
- 4-84
12 55
- I-8 7
7 10
- 4-98
I 3 2
- 2-67
8 53
- 4'47
'3 34
- 1-58
9 IS
- 5'27
'3 45
- 2-24
Mar. 23
7 10
- 4'5 2
Mar. 29
8 40
1-04
7 3
- 570
8 48
- 1-23
7 4
- 5'59
8 o
- 5' 10
8 10
- 5-5o
8 26
- 4'9
Greenwich.
8 40
- S'45
8 50
- 5'45
- 5-38
Apr. 6
9 3
!+ 064
9 4
- 5'5
9 45
+ 0-25
+ 0-64
9 5
- 5-16
I I 10
+ 0-73
10 10
- 5' 2 5
1 1 20
+ 0-82
10 30
- 5'3
II
- 5'39
II 17
- 6-14
Apr. 8
9 3
+ '9
II 24
- 5'9 6
9 50
+ ri8
12 10
- 5^9
10 30
+ 2'01
I I 20
+ 1-88
ii 35
+ I') 8
+ i'54
Mar. 2 5
6 40
- 3^5
12
+ I^I
7 30
- 4 - 3
12 30
+ 1-51
7 4
- 311
13 o
+ 1-88
8 14
- 4-I7
13 3
+ i'35
GREENWICH OBSERVATIONS, 1902.
2 f
222 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Transit 13 continued.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Leyel
Error.
W.
E.
W.
E.
Greenwich continued.
Greenwich continued.
1902.
h in
"
it
"
"
1902.
h in
"
Apr. 9
8 10
078
Apr. 1 7
ii 45
- 1-61
8 36
- 0'35
12
- 1-40
9
0-50
i* 35
- '->5
10
0^36
12 59
i -06
10 30
O'22
,3 8
i '04
'3 3
- i^3
Apr. 10
8 40
0-82
8 45
- 0-13
9 '5
- '39
Apr. 1 8
8 45
- 1-40
9 40
- 0-66
0-48
9 18
- 1-58
10
0-40
9 35
- 1-31
10 40
0^96
9 5o
0-70
10 55
o - o6
10 25
no
10 38
i '03
- 1-26
Apr. 12
9 o
- 93
I 1
1-02
9 35
- 0-58
11 1 2
- 1-18
IO O
- 1-07
I 1 40
- >'?
IO 10
- i'>3
- '95
12 O
- I'S"
10 30
O'gi
12 27
- 177
II 50
- 1-16
I 2 40
- 1-30
12 O
1-09
12 40
- 0-85
Apr. 1 3
8 20
- 1-58
Apr. 20
9 o
i "90
8 30
- 1-24
9 20
0-98
9 5
- 1-56
9 35
- 1-14
9 20
- 1-68
10
- 1-30
- I-32
9 55
- 2-56
10 30
- ''23
10 15
- 1-87
II 10
no
10 40
- ''45
- i5'
1 1 30
1-20
II 15
- '33
n 45
- 1-30
12
- 1-50
Apr. 21
9
- *'54
12 I 5
0-8 1
10 5
2'2I
12 40
- ''37
13 o
- i '44
Apr. 22
9
- '77
9 30
- l- 5 6
Apr. 1 7
8 50
- i'34
IO O
0*90
9 20
- 1-41
10 35
- 0-86
9 35
- i'35
I I 20
- 0-79
- 0-82
10 I I
- 1-18
I I 40
0-69
10 30
ro6
12
O'OO
10 56
0-87
13 10
+ 0-32
II 15
- i'*9
- 1-24
13 30
0-26
1
ERROR OF LEVEL.
Transit B continued.
223
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
W.
E.
W.
E.
Greenwich continued.
Paris continued.
1902. h nl
.
. -
1902.
h in
Apr. 23 8 50
- 2-56
Apr. 29
10
+ 4*20
9 20
- i '34
10 8
+ 3'3 2
+ 3'69
9 4
1-47
10 40
+ 3-05
10
2'I I
10 25 2-19
1 1 10
- 170
May i
10 15
+ 2-26
I I 20
- 2-03
- 170
10 47
+ i'99
.
II 25
171
ii 7
+ 2-04
1 1 40
- ''35
ii 18
+ 1-56
12 O 2'OO
n 45
+ I'53
13 O I '02
12 22
+ i '49
13 4
- 0'86
12 40
+ 1-58
+ 173
'3 5
+ 1-89
'3 39
+ 2-OO
Apr. 24 9 10
- 2 '95
13 55
+ ''33
9 '5
- 2-84
14 15
+ I- 33
9 4
~ 2 '33
14 30
+ ''49
100
3'oi
10 35
- 2-50
10 55 2'6o
May 3
10 25
+ 3&5
ii 10 275
- 2-52
10 36
+ 3'5 2
ii 35
- 2-27
10 58
+ 377
12 o 2-28
1 1 18
+ 4' 10
12 25
- 2-29
n 43
+ 3'^5
12 35
- 2 '99
12
+ 3'66
+ 3 '47
13 o
- 2-36
12 24
+ 3-23
13 35
- !'94
12 44
+ 3 '47
13 30
+ 2'97
13 4
+ 3' 1 1
'3 5
+ 3'
Pan's.
Apr. 28
IO O
+ 3'68
Greenwich.
10 18
+ 3 QI
10 30
+ 4' 2 6
Sept. 21 20 55
0-98
I I
+ 3'54
21 30 I - 0-57
- 75
II 15
+ 4 'oo
23 10 |
0-62
ii 45
+ 374
12 IO
+ 3'4 2
+ 2 '95
12 25
+ 2 '9 X
Sept. 22 19 o
i'35
>3 3
+ 1-89
19 '5
- 1-07
14 o
+ z'87
19 45
- 074
14 10
+ 2-51
20 2O
+ 0-09
14 25
+ 176
20 4
- '49
14.40
+ 2 ' 2 5
21
- 0-24
0-30
15 10
+ >'43
21 40
+ O'l I
224 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS -GREENWICH, MADE IN 1902.
Transit B continued.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
W.
E.
W.
E.
Greenwich continued.
Paris contin ued.
1902.
h m
/'
"
"
1902.
h m
'/
/;
"
Sept. 22
21 55
+ 0-04
Oct. 6
20 35
+ 1-58
22 JO
+ 0'34
21 5
+ ''44
22 40
+ 0'2I
21 17
+ 174
23 10
+ 0-25
21 42
+ 2-13
+ 1-86
22 O
+ 2-36
22 28
+ 2-15
Sept. 23
2.1 O - 38
22 55
+ r86
21 55
0-30
0-21
22 25
+ 0-14
Oct. 7
20 2O
+ i'37
21 8
+ 1-68
Sept. 24
I 9 3
0*63
21 45
+ 2-15
'9 45
- 0-83
22 4 2
+ 3-3i
20 2O
1-04
22 55
+ 3 '47
+ *'40
21 O
- 0-68
23 13
+ 272
21 15
- 0-51
23 57
+ 2-87
22
- '57
- 0-68
12
+ 3^3
22 40
- 0-17
23 5
078
23 16
- 0-89
23 30
078
Oct. 8
21 I 3
0-31*
23 50
072
22 53
- 077
'3 8
- 0'93
- 0-38
23 48
0-09
23 58
0^03
Sept. 25
19 10
- ''49
o 38
0-28
'9 45
- 1-29
19 50
- i'39
20 5
- 1-32
- ''IS
20 25
- 77
20 55
0-90
Oct. 9
20 i 3
- i'33
21 5
0-87
20 53
- '7'
21 12
- i'47
21 38
- i -80
- 1-38
21 53
- i'i3
Sept. 26
19 10
- 1 03
22 1O
,
- i-'5
19 40
o'6i
'9 45
- 077
20 1,
- 0-85
20 25
0-80
20 55
0-67
067
Oct. 10
2O 23
- 1-23
22 I 5
- '55
21 3
- '97
22 50
- 074
21 43
076
23 10
- 074
22 18
n i
O O
o - i9
22 43
I '02
- 0-89
Oct. 8. The instrument was adjusted in level before the observations.
This observation of Nadir has been used with weight i.
ERROR OF LEVEL.
225
Transit B continued.
Date.
Sidereal
Time.
Striding Level.
Nuilir.
Adopted
Level
Error.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
W.
E.
W.
E
Paris continued.
Pari* continued.
1902.
h in
"
"
1902. h "'
-
>
"
Oct. i o
22 58
- '99
Oct. 1 6
I 28
+ 2-51
23 18
- 071
i 47
+- 2-47
+ 1-98
2 3 48
- 0-87
i 58 + 276
o 3
- 0-83
2 30 + 3-17
o 28
o'40
2 56 + 2'59
3 '6
+ 3-3
Oct. 1 7
20 43
+ 1-85
Oct. i z
20 33
+ 0-07
21 I 3
+ 2-55
20 55
+ 0-07
2 1 40
+ 2-56
21 16
0-07
21 50 + 2-44
22 8 + 2'59
22 45
-1- 2-94
+ 2-84
23 7
+ 3'2I
Oct. 1 3
20 33
0-26
23 4 2
+ 3'20
20 54
O'OO
o 23
+ 3-4
21 33
+ '39
+ 0-16
I 10
.
+ 37'
21 ,2
+ 0-19
22 I 3
+ 0-53
Oct. 1 8
21 55
+ 3'3
22 5
+ i'95
Oct. 14
20 33
+ 0-69
20 55
+ 0-85
21 6
+ 0-87
Oct. 2 1
21
+ i'5o
21 41
+ 1-31
21 14
+ '"55
22 4
+ '-S3
21 40
+ 2-40
22 25
+ i'H
+ i'43
21 50
+ 2-19
22 43
+ i'59
22 6
+ 2-31
23 8
+ i'97
22 34
+ z'45
+ 2-49
23 4
+ 1-82
23 10
+ 3'28
23 56
+ 2-42
23 41
+ 3'i
o 23
+ 1-98
o 27
4- 3-40
o 57
+ 2-99
1 35
-(- 2-90
Oct. 1 5
21 O
+ '49
22 22
22 55
+ 0-55
+ 74
+ Q'54
Oct. 22 2 I 30
+ 2-43
23 21
+ '49
i 21 15
+ 2-45
o 36
+ '77
' '3
+ 3-09
i 41
+ 3^3
+ 2- 9 8
Oct. 1 6
23 33
+ Q'05
' 55
+ 3'"7
O
+ 0-87
2 29
+ 2 "9
o 28
+ i'4
2 51
+ 3'79
I
+ 1-85
3 >5
+ 3'65
226 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS- GREENWICH, MADE IN 1902.
Transit B continued.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
W.
E.
\V.
E.
Greenwich.
Greenwich c Dn tinned .
1902.
b m
If
//
1902.
b m
"
"
"
/*
Oct. 25
23 o
- '54
Oct. 30
O IO
072
23 50
+ 0-07
o 35
+ 0-36
+ O'22
1 5
+ 73
Oct. 31
o 30
- i'37
i 35
+ 0-72
o 40
- 1-14
I O
- 0-89
Oct. 26
o o
- 0-34
o 27
0-28
0-46
Nov. I
22 42
- 2-07
i 6
0-65
22 55
- i '3 1
i '5
- o'57
23 10
1-40
- 1-27
23 45
- i'i7
Oct. 27
- 1-34
o 3
0-81
O IO
- 1-52
o 35
- 1-32
1 10
- 1-03
- 1-05
Nov. 2
21 32
O'20
i 35
- '44
21 43
- 0-I 5
2
- ri6
21 55
O'OO
2 15
0-67
22 IO
+ O'OI
22 26
O'OI
0-04
22 45
+ O'o6
Oct. 29
21 10
0-65
22 55
+ o'o6
21 40
+ 0-16
2310
o'O4
21 53
+ 0-03
o 20
O'l I
22 7
O'OO
22 2O
- 0-17
22 44
+ 0-03
23 o
+ 0-21
Nov. 3
21 45
- 0-49
23 10
+ 0-15
22 4
0-83
23 39
+ o'o6
+ OM I
22 2O
- 0-66
0-58
23 53
+ 0-06
22 50
- 0-35
1
+ '9
23 5
0-64
20
+ 0-40
o 28
+ 0-57
o 36
+ 0-84
I IO
+ 0-42
Nov. 4
21 38
- o-57
I 20
+ 0-17
21 56
- '54
23 o
- Q'47
23 20
- i'i3
Oct. 30
21 I,
- 0-88
23 45
- 73
21 24
- '99
o 8
- 1-18
0-8o
21 55
i -08
o 27
0-89
22 26
o'og
076
o 40
0-84
22 50
o'6i
i 5
0^92
23 35
0-8 1
i 45
- 0-84
2 3 45
0-84
2
- o'88
ERROR OF LEVEL.
227
Transit G.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
W.
E.
W.
E.
i
Greenwich.
Greenwich continued.
1902.
h in
"
-
4t
<
1902.
h m "
ft
"
Mar. 15
8 o
- 5'2i
Mar. 2 1
7 o
+ 2-23
7 5
+ 2-28
8 10
+ 3-00
Mar. 1 6
7 o
- 7 - >2
8 30
+ 2-56
+ 2-33
10
+ 2-64
10 10
-f 2'OO
Mar. 1 7
6 50
- 8-38
10 35
+ ''97
7 5
- 9'3
I I IO
+ 2-25
7 45
- 8-05
8 10
- 8-18
8 25
- 8-22
Mar. 22
7 o
+ i'45
9 '5
- 871
7 4
+ '47
10 45
- 8-28
- 7'97
7 50
+ i'*9
II 10
- 7'34
8 35
+ '49
II 15
- 8-64
8 40
+ 2-18
1 1 20
- 7'45
9 '5
+ 0-81
+ i '42
12
- 7'39
9 30
+ 075
12 1 5
7-00
9 50
+ 0-98
10 35
+ 1-80
10 50
+ 1-86
Mar. 1 8
8 o
- 7'95
U o
+ 1-96
12
- 7'39
Mar. 23
7 3
+ i-oo
Mar. 19
6 50
0-04
8 30
+ i-5'
7 5
+ 0-06
8 45
+ 1-83
7 25
+ 0-42
9 3
+ 2'O2
+ 1-48
7 40
+ 74
10
+ 1-03
8 5
+ 1-04
IO 2O
+ I "60
9 5
+ 0-89
I I O
+ 1-67
9 35
+ 1-03
+ 75
9 40
+ 0-85
Mar. 24
8 o
+ 1-36
10 5
+ i-33.
10 35
+ i 15
Mar. 2 5
7 25
+ 1-07
I I
4- I -06
7 3
+ I-H
I I 20
+ 0-98
8 10
+ 0-58
8 20
+ 1^9
Mar. zo
7
+ 0-96
8 35
+ i'95
7 5
+ i'53
9 '5
+ ''S3
8 10
+ 1-04
9 45
+ I'2O
+ i'33
8 50
+ i '47
9 58
+ I'OO
9 20
+ '44
+ POI
10 15
+ i-35
9 4
+ 0-80
10 55
+ i-3*
9 50
+ i '43
I I 10
+ 2-24
10 o
+ 0-93
1 1 30
+ 0-91
10 30
+ -59
1 1 40
+ 1-63
228 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Transit C continued.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Levc'l
Error.
W.
E.
W.
E.
Greenwich continued .
Paris continued .
1902.
fa in
"
"
"
'
1902.
h m
"
"
"
Mar. 27
7 3
0-55
Apr. 9
8 30
+ 3'9
7 5
- 0-18
9 '
+ 3 '96
8 25
0'2 1
10 18
+ 4'2Q
8 45
0-67
10 23
+ 3'59
9 10
0-29
I I
+ 3'68
9 4
+ 0-14
O'l I
1 1 20
+ 4' 22
10
+ 0-26
12 5
+ 2-92
IO iO
0*29
10 30
+ '34
I I
+ 0'08
Apr. 1 1
8 50
+ 4'45
II 10
0*56
9 25
+ 4'48
" 35
+ 0-56
9 44
+ 3'9 6
10 54
+ 3-71
Mar. 28
7 3
0-50
I I IO
+ 3-87
+ 4'8
8 10
0-90
12
+ 3'9
8 30
+ O'OI
12 25
+ 3-9'
9 o
0-50
12 39
+ 4'&7
9 3
o - 3o
12 55
+ 4' 2 5
9 40
- '39
13 o
+ 3 '^4
10 5
- 0-68
0-2O
10 2O
0-40
Apr. 13
9 5
- 2-94
I' 5
+ '45
9 48
2-92
ii 15
+ 0-31
IO 1 I
- 3'93
1 1 50
+ '9'
10 27
3'3z
12 25
O'OO
II 15
2-83
12 50
+ 0-13
ii 45
- 3-41
- 3-68
12
3^3
Mar. 29
8 15
'43
12 24
- 4''7
8 20
o - 6o
13 o
- 4-03
8 30
- 0-57
(
3 39
- 4'3
14 o
- 4'7
Paris.
14 10
- 4'34
Apr. 7
8 50
+ 2'IO
I I
+ 178
+ I-63
Apr. 14
9 5
- 1-64
13 o
+ I '02
9 '7
- 1-52
i -60
Apr. 8 845
+ 277
Apr. 15
9 23
- 0-37
8 56
+ 2'IO
10 8
+ 2 f 35
10 54
+ 2-87
Apr. 17
9 20
- 1-03
II 20
+ r6 9
+ 2-03
9 45
1% 34
12
+ 2I I
10 15
- ''57
I 3 15
+ I '42
1 35
i '60
'3 3
+ 74
ii 16
- i-75
The instrument was adjusted in level on April 12.
ERROR OF LEVEL.
229
Transit C. continued.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
Date.
Sidereal
Time.
Striding Level.
Adopted
N'adir. Level
Error.
W.
E.
W.
E.
Paris con tinued.
Parix continued.
1902.
h m
"
"
1902.
b m , "
-
Apr. 17
1 I 22
- 2-05
- 1-92
Apr. 21
ii 58 + o-;8
+ 0-96
ii 45
- * '49
12 10 + 0-84
12 40
- I'82
12 35
'3 25
- I' 9 8
13 18
+ 0-05
'3 4
- 2-44
'3 3
+ 0-09
'3 55
- 372
3 4
o - o5
Apr. 23
9 36
+ 1-85
Apr. 1 8
9 35
- O'o8
10 14
+ 2'45
10 17
0-12
10 35 +2-10
10 36
- 0-89
II 4- 2 '07
10 53
- 0- 5 7
I I 42 + 1-65
H 5
0^65
12 2 5
- '34
+ 0-96
1 1 20
0-2O
12 40
+ 0-55
ii 42
+ o'o6
0-65
13 o
+ 0-25
12
- 0-37
13 20 ;
+ 0-75
12 24
- 0-23
13 36
+ 073
12 37
0-76
14 15
- 0-25
'3 30
- 1-48
'4 35
+ 0-06
'3 55
- I'I 9
14 8
I -60
Apr. 24
IO O
4- 2-04
10 45
4- 1-48
n 18
4- 2-20
Apr. 19
9 38
+ I'lO
" 43
+ r62
10 25
+ 1-45
+ i-i
n 57
!+ 1-28
I I 2
+ 1-19
12 24
+ 0-93
12 37
+ 2-17
+ i '29
'3 5
+ I'H
Apr. 20
9 36
+ 0-68
13 22
+ i '49
IO 20
+ I -80
13 3
+ 1-88
10 35
+ i'5
14 20
+ o - 59
10 52
+ 74
H 35
4- 0-40
I I 10
+ 0-13
'4 48
+ 0-48
ii 43
O'OO
+ 0'47
ii 25
+ 0-16
12 43
+ 0-16
Greenwich.
13 19
+ 0-96
13 3*
+ 0-60
Apr. 27
10 30
0-78
13 58
- 0-68
I I
- 2I
i i 20
0-87
35
- I-3I
Apr. 2 1
9 5
+ 1-58
12
- 0-87
o'6i
IO IO
+ 3-23
12 35
0-65
10 40
+ 1-24
12 50
+ O'll
11 5
+ "95
I 3 I 7
0-46
1 1 42
+ 1-27
'3 35
- 0-47
GREENWICH OBSERVATIONS, 1902.
230 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Transit G. continued.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
W. E.
W.
E.
Greenwich continued.
Greenwich continued.
1902.
h m
"
"
"
"
1902.
h Hi
"
"
"
Apr. 2 8
10 10
- 73
May 3
10 25
I '00
10 25
- 1-28
10 35
- 0-86
10 35
0-65
10 45
- '44
10 53
+ 0-07
ii 5
- 0-88
n 15
- '43
ii 35
0-28
ii 28
O'OO
ii 43
+ 0-36
ii 58
- '35
0*03
1 1 50
roi
12 23
12 40
+ 0-29
12 39
O'22
13 20
+ 0-46
13 o
+ '54
13 4
+ 0-58
13 25
- 0-98
13 54
+ 0-89
13 35
- 74
14 17
+ Q'98
'3 53
0*27
14 30
+ 0-29
14 20
+ 0-56
0'2
14 40
+ '!9
14 40
- 1-03
14 48
O'I2
1 5 10
0-40
Apr. 30
10 50
1-15
15 25
O'22
11 10
1-20
Paris.
May i
10 1 5
10 33
ii 6
0-65
- 1-82
- I-52
Sept. 21
19 5 6
20 2O
2O 42
- I- 5 8
- 0-52
- 0-38
1 1 19
0-38
21 IO
- i '45
ii 58
12 2O
'33
0-56
22
22 42
+ '49
0-44
- '43
12 26
0-28
22 52
- no
12 44
13 o
+ 0-83
I '01
- 0-37
23 27
23 5 6
+ O'll
13 25
+ 078
5
+ 0-23
13 49
+ 0-51
Sept. 22
19 18
; - ^-65
14 24
+ 0-30
19 25
2-03
14 42
0-16
19 49
2-21
14 48
o'03
19 59
- 1-66
2O 20
- 0-97
i
2O 36
1-90
i
May 2
10 47
- n8
21
no
12
1-47
21 44
2'12
- 1-24
12 I 5
- 0-18
21 48
- '97
12 36
- 0-27
22 21
0^96
12 56
- 071
o'8i
22 40
- 0-66
13 17
1-92
22 55
1-09
13 35
0-09
23 15
0-39
13 49
0-40
Z 3 35
- 0-81
H 7
072
Z 3 57
0-50
May 3. Observations of stars began at iz h 44 m , the sky had been overcast earlier. The Adopted Level Error has been
deduced from the determinations made after n h 5o m .
ERROR OF LEVEL.
231
Transit C. continued.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
W. E.
W. E.
Paris continued.
Greenwich continued.
1902.
h lu
"
ft
"
*
1902.
h m i "
"
-
"
Sept. 23
20 10
- I- 59
Sept. 30
1 9 30
2 '90
>9 57
- 270
Sept. 24
9 55
- 34
22 42
+ 0-06
23 o
+ '44
Oct. i
20 5
- 2-31
23 10
+ o-55
23 26
+ 0-83
23 39
+ '55
Oct. 2
19 40
- 2 '94
23 5'
+ 1-15
20 10
- 3'44
I I
+ 1-42
+ o'53
20 40
- 2-40
o 18
+ 1-15
20 45
- 1-81
o 36
+ o-6
21 20
- 1-50
o 54
+ '49
21 50
2-48
- 2-36
I 12
+ 0-54
21 56
- 276
I 2 S
+ '43
22 5
- ''95
i 49
+ '43
22 15
2-69
22 45
2'02
Sept. 26
20 55
+ 0'47
22 53
- I-I2
21 5 2
O'l I
23 10
- 2-48
22 7
+ O'l 1
22 24
+ i '26
Oct. 3
21
3 - o6
22 43
+ 0-61
22 53
+ 0-17
Oct. 7
2O 2O
- 1-87
23 15
+ i-35
+ 0-89
2O 30
- 2-33
23 35
+ 1-22
21 O
- 2-18
o 38
+ o'53
I 10
+ 1-03
Oct. 8
19 50
- i'77
i 16
+ 0-83
20 23
- 1'59
' 39
-1- 1-68
20 35
I'22
i 50
+ i'4
20 52
- i '39
2 2
+ I-48
21 3
- 1-37
21 50
- ''52
Greenwich.
21 55
070
- 1-16
22 5
- 1-14
Sept. 29
19 24
2-08
22 45
i -04
2O O
2'O
22 55
- 071
20 30
- 2-97
23 25
0-82
2O 40
2-01
23 35
0-69
21 18
~ 1-83
5
- 1-05
21 45
- ''54
2'2C
O 20
- 0-86
21 55
- 274
22 5
- 3'99
22 10
- 1-81
Oct. 9
2O 2O
- ''54
22 30
- I-30
2O 40
- 073
22 40
1-69
21 5
- i'33
22 55
- 275
21 53
- 1-47
232 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Transit C. continued.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
W.
E.
W.
E.
Greenwich continued .
Greenwich continued.
1902.
h m "
"
'
"
190*.
h m
"
"
"
"
Oct. 9
22 20 - 1-84
Oct. 1 4
21 50
- 0-47
22 2 5
- 073
- <' 2 9
22 15
- 1-04
22 53
0-98
22 45
- '55
- 73
23 12
- 1-42
23 4
- 77
23 30
- 178
23 12
I'll
23 50
- '93
23 2J
+ 0-08
10
- 1-23
23 55
- '99
o 6
i '64
o 15
- 0-68
Oct. 10
2O 10
- 173
o 30
I'02
20 50
- 177
21 5
- 2-30
Oct. 1 5
21 5
- ,-8 7
21 20
- I -08
21 44
- I "So
21 25
0-40
22
- 1-64
21 55
- 1-07
.
22 I 5
- 1-72
22 40
i'o6
22 55
- '94
22 50
I -oi
1-04
23 o
- 1-66
- I'47
23 20
- 79
2 3 22
- 2-33
23 28
- 0-85
23 35
- 1-04
23 40
+ 0-18
5
- 0-88
23 55
2-08
o 30
- 1-27
o 5
- 0-86
o 40
- 1-23
o 15
o'o5
2,
- 0-54
Oct. 1 6
20 30
- 2-86
20 58
- 1-64
Oct. 1 1
0-80
21 18
- l'93
2O 40
- 1-04
21 25
- 170
21 45
- 1-87
.
Oct. 1 2
20 10
- i'35
21 53
- 1-64
20 50
- 1-04
22 5
- 1-17
21 2
- 0-51
22 30
0-87
21 22
+ 0-36
22 5;
- 2-54
- i '47
21 30
078
- o-77
23 10
- 1-65
21 45
- '44
23 55
o - 6o
22 10
- >'5 2
5
- 0-84
22 30
- 0-42
o 15
- 1-30
o 20
I'02
Oct. 1 3
22
- '5'
o 40
- ''S3
55
- 0-98
I 10
- 079
Oct. 14
20 15
078
2O 40
- 0-68
20 52
0-27
Oct. 1 7
20 35
- 279
21 10
ri2
21 8
- 4'4 8
21 2O
0^29
21 30
3'o6
21 25
- 0-17
21 50
- 273
* ' '
ERROR OF LEVEL.
233
Transit C. continued.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
W.
E.
W. E.
Greenioich continued .
Greenwich continued.
1902.
h in
//
."
//
<
1902.
b m
"
// it
//
Oct. 17
21 55
- 3''5
Oft. 22
21 18
' 2-24
22 36
- 2-26
21 45
- 278
22 50
- 2-93
21 55
- 2-46
22 55
. 2-90
- 273
22 2O
- 2-58
23 5
- 2-62
22 50
- 2-53
23 16
2-89
23 3
- 2-51
23 33 - i '43
23 16
- 1-88
23 40 2'62
23 30
- 2-13
23 50 - 2-85
23 35
- 2-13
2'2I
o 15
- 2-09
23 54
- 2'45
2
- 270
o 16
- 2-46
Oct. 1 8
21 45
- 1-88
o 30
2'OO
22 18
1-69
i 38
- 1-52
22 25 - 1-64
i 40
- 1-26
22 53 - 2-56
1 53
- 1-71 !
23 9 - 2-23
23 20 j 2'l8
23 39
0^96
1-82
Paris.
23 52
- 2-36
o 4
1-48
>
Oct. 25
22 23
+ I -2O
o 15
- 1-50
22 44
+ 1-87
o 30
I '69
23 4
4- i-47
o 53
- 1-86
o 3
+ 2-74
I
- 1-67
o 15
+ 3'6
o 33
+ 3'37
+ 2- 5 8
o 56
+ 2-84
Oct. 2 1
20 50
- ''95
i 7
+ 3' 6
21 28
- ''39
I 22
+ 3'34
21 42
- 1-43
I 31
+ 2-84
21 JO
- 2-24
> 45
+ 3-n
21 57
2-01
22 3
- 2'lS
Oct. 27
22 44
+ 0-18
22 26
- i-39
22 50
0-61
22 58 1-50
23 o
+ 0-66
23 3 - 0-99
23 28
+ o'57
23 9 - 1-15
- ''52
23 52
0-46
23 30
- 1-27
o 13
+ 0-67
+ 0-17
o o - 175
o 35
+ '55
09 I '42
i 5
+ 0-24
o 28
I "80
i 30
+ 0-07
o 32
1-80
i 58
+ 0-33
o 52
- i'53
55
- o 87
Oct. 28
22
+ 0-55
i 30 i '48
22 40
+ 0-08
1 35
- 1-09
23 10
+ o'66
Oct. 26. o h . The instrument was adjusted in level.
234 TELKGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Transit C. continued.
Date.
Sidereal
Time.
Stridiug Level.
Nadir.
Adopted
Level
Error.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
W.
E.
W. E.
Paris continued.
Paris continued.
1902.
h in
"
"
tt
"
1902. | >' '"
"
'
"
"
Oct. 28
23 2 9
4- 0-94
Nov. 2 o 32
+ i'53
23 51
+ 1-23
+ 0-96
o 46
4- 2-64
+ 2-II
12
+ 0-88
5
J4- r66
o. 33
+ 0-55
22
4- 1-98
o 48
4- 1-52
45
+ 2-94
I
+ I-2I
51 + 2-40
I 50
+ I-92
59 f 278
2 1 8 | 2 '04
2 23
+ 2-13
Oct. 29
22 O
+ 1-64
22 l6
+ 1'02
22 52
+ 2-61
Nov. 3 22 21
+ 2-53
23 16
4- 2-46
22 44
+ 2-89
23 38
+ 3-49
22 52
4- 2-51
23 51
+ 4'3O
23 '
+ 2-47
+ 377
23 '7
4 2-06
o 17
+ 5'o6
+ 3'j6
23 39
+ 3'55
o 35
+ 3*61
23 55
+ +'
o 46
+ 4'8
O 20
+ 2 '95
i 6
+ 5'7
o 43
+ 3'5
+ 3-29
I 10
+ 4 -I 9
55
+ 284
I 20
+ 4-65
8
+ 4-42
i 57
+ 3-62
23
+ 4'4
32
;+ 3'55
45
+ 3'93
Oct. 3 1
22 8
+ 2-98
54
+ 5'4
22 18
4- 2-19
2 15
+ 3'45
22 4 I
+ 278
22 58
+ 2-29
Nov. 4
22 21
+ 316
*3 39
+ 2-19
22 4!
4- 3-06
23 5'
+ 3' 2 4
22 5 1
+ 2-62
O 21
+ 2-19
+ 2-98
23 6
+ 2-08
o 35
+ 3'5
23 26
4- 2-03
o 46
4- 3-52
23 39
4 i'H
i 6
+ 274
o 6
+ 3-29
i '3
+ 3'87
12
+ 2-25
1 22
+ 3-87
O 2O
+ 2-35
I 3
+ 3'5 8
o 36
4- 2-95
+ 2-68
i 55
+ 3H5
o 58
+ 2-94
7
+ 3-05
2 I
+ 3' 01
Nov. 2
22 21
+ 2-18
43
+ 3-27
22 45
4- 2-81
47
+ 3-88
23 21
+ rn
57
+ 276
o 3
+ 1-85
2 1 9
+ 274
o 27
+ r8o
2 2)
+ 2-59
ERROR IN AZIMUTH. 235
XL ERROR IN AZIMUTH.
The deviation of the instrument in azimuth was determined by observation of one or
more of the following Polar Stars. The first column contains the name of the star taken
from the Greenwich Catalogues. The second gives the Ephemeris, either the Nautical
Almanac (N.A.) or the Connaissance des Temps (C.T.), M. Lcewy's Ephemeris (L.) or
the Berliner Jahrbuch (B.J.), in which the star appears. In the next two columns are
given the approximate N.P.D. and the mean R.A. for 1902 as given in the Ephemeris.
The fifth column contains corrections to this mean R.A., deduced from Newcomb's
Fundamental Catalogue, from the Greenwich Ten Year (1890) Catalogue, or from the
Greenwich Clock Star List 1902 ; a correction of + S- 054 being applied in the last two
cases to reduce the R.A. to Newcomb's Equinox. In the cases of 75 and 76 Draconis and
of Bradley 1508 the apparent R.A. for the day has been deduced from the Greenwich Ten
Year Catalogue (1890), or Newcomb's Fundamental Catalogue, and the mean places
given in Columns 3 and 4 are computed from the last-mentioned Catalogues.
The corrections to observed transits for instrumental errors have been computed by
the formula c sec. S + n tan 3 + m, where S is the declination of the star, c the
collimation error including diurnal aberration, n the deviation of the line of collimation
at the pole, and m the deviation at the equator.
For the determination of the quantity n, transits of a polar star and a clock star
are combined, and the value of n deduced by use of the appropriate factors, as exhibited
in the tables, pages 237 et seq. In these tables the second column gives the names of the
polar star and clock star observed generally in the same position of the instrument as
the polar star and not long before or after. Column 3 gives the position of the instru-
ment in which they were observed. Column 4 shows the seconds of difference between
the Tabular R.A. for the day, and the Observed time of transit corrected for collimation
by application of the quantity c sec. S. The correction for clock rate for the interval
between the two observations has only amounted to 8 '01 in a very few cases. The
next column shows the tangent of the declination of each star. Subtracting the lower
of each pair of lines from the upper in columns 4 and 5, the quotient of the difference
in Column 4 by that in Column 5 gives the value of n found in Column 6.
The adopted value of n, given in the last column, has been found by taking the
simple mean of the values for the two positions E and W respectively.
236 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Star's Name.
Ephemeris
Approximate
N.P.D.
Mean R.A.
1902*0, given in
Ephemeris.
Adopted
Correction
to R.A.
Authority.
2 Ursas Minoris
L.
O '
A. l6
h m s
o c c i6*6c
8
0*24.
Ten Year ( 1 890) Catalogue.
Polaris
N.A.
I It
I 1\ 24/O4
+ 0-28
Clock Star List.
Cephei 4.7 ...
B.J.
10 c8
2 C^ 2'^4.
O'O7
Newcomb's Catalogue.
Cephei 51
N.A.
2 4.8
6 C4 4^'2^
+ 0-62
Clock Star List.
Groombridge 1119
N A
I A
8 O I2'Q7
O'A.6
Piazzi IX. 37
L
8 14.
t y
q ^^ 8-c8
-4- O'AC
Ten Year (1890) Catalogue.
Bradley I iqq. ..
C.T.
C I C
10 15 28*07
o'o6
Newcomb's Catalogue.
Bradley 1508
1 1 4.3
IO C2 7'6?
Bradley 1671
N.A.
1 AC
12 i j. 23 *6 1
-4- o'j.?
Clock Star List
Groombridge 2283
NA.
1 -t!>
2 27
1C 8 3Q'73
+ O'IQ
N A.
39,-J
l8 \ C^'74.
-4- O'lO
X Ursaa Minoris
N.A.
I O
IQ 2O I V4.3
+ 0-82
Bradley 2701.....
L.
8 C4.
2O 37 I'CQ
'
+ 0-41;
Ten Year (1890) Catalogue.
75 Draconis
8 c.4
2O ^,1 2J.*1O
76 Draconis
o 5^
7 A.Q
2O 4.Q 4.2'J.I
Newcomb's Catalogue.
Groombridge 3548
C.T
1 22
2 I IQ I I'SQ
+ 0-28
Clock Star List.
Bradley 200*...
L
423
22 21 Q*6 1
-4- O'z c
Ten Year (1890) Catalogue.
Bradley 314.7...
N A
1 14
23 27 A7'iQ
+ 0-88
Clock Star List
ERROR IN AZIMUTH.
237
Transit B Values of n.
Date.
Names of Stars.
Position.
Tabular
R.A.-
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
Date. : Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent
n
Adopted
1902.
Mar. i 8
Mar. 1 9
Mar. 2 3
Bradley 1 399
w
w
\v
W
W
W
E
E
E
E
E
E
W
W
W
w
E
W
W
E
E
E
W
E
W
W
w
w
Paris.
m a
- I- 0'43
o. 46*09
o. 28-05
- 0.47-19
- I. 6-6 7
- 0.47-15
- I- 7'9 8
~ Q-47'37
o. 51-89
- 0.47-39
o. 40-08
- 0.47-48
o. 36-85
- o-47' 59
- i. 6-31
- 0.47-32
- o. 59-96
- 0.47-32
o. 50-98
- 0.47-69
- o. 33-72
- 0.47-67
o. 36-38
- 0.47-73
- 0.43-73
- 0.47-64
- o. 50-73
0.47-68
+ 10-88
+ 0-64
-56-69
+ 0-51
+ 53-50
-1- o-37
+ 53-50
+ o-54
+ 10-88
+ 0-62
-13-04
+ 0-95
-17-71
+ 0-87
+ 3^54
+ 0-50
+ 3Z-54
+ 0-50
+ 20-49
+ 0-41
56-68
+ 0-41
-56-68
+ 0-51
-16-99
+ '47
+ 10-88
+ 0'45
a
1 -40 1
-o-335
-0-367
-0-389
-0-439
-0-529
-0-578
-o-593
-0-395
0-164
-0-244
0-198
0-224
0-292
1-401
-0-453
-0-235
1902.
Mar. 23
Mar. 2 5
Mar. 28
P
Bradley 2993 S.P.
33 Leonis Minoris
Cephei 51
iris
W
W
W
E
E
E
E
E
W
E
E
E
W
W
E
E
E
E
E
E
E
E
W
E
E
E
W
W
E
W
-continurd.
m s
- 0-44-43
0.47-80
- o- 49'59
- 0.47-95
- 0.49-58
- 0.47-95
0.40-91
- 0.47-92
o. 46-15
- 0.47-90
o. 58-19
0.47-81
- o. 53-50
- 0.47-94
o. 50-81
0.48-15
- 0.47-48
o. 48-10
- o. 55-14
- 0.48-13
- o. 50-41
o. 47-80
0.46-23
- 0.47-87
- 0.44-71
- 0.47-85
o. 51-60
o. 47-81
- 0.51-41
- 0.47-81
-13-041
+ 0-65
+ 20-49
+ 0-82
+ 20-49
+ 0-82
-56-68
+ 0-87
-56-68
f 0-51
+ 53-52
+ 0-53
+ 53-52
+ 0-46
+ 10-88
+ 0-87
-13-04
+ 0-69
+ 32-56
+ 0-50
-17-71
+ 0-40
+ 32-56
+ 0-16
+ 32-56
+ 0-47
-47-24
+ 0-77
-47'24
+ 0-77
a
0-246
0-083
0-083
0-122
O-O3I
0-196
O-I05
O-266
-0-045
0-219
+ 0-144
+ 0-05I
+ 0-098
+ 0-079
+ 0-075
a
o'i 14
+ 0-086
20 Leonis Minoris.
X Ursse Min. S.P...
v Geminorum
Groomb. 1119
6 3 Auri< r e . ...
63 Aurigse
X Ursae Min. S.P...
66 Aurigse
85 Geminorum
Groomb. u 19
</> 1 Cancri
X Ursse Min. S.P...
<f> Geminorum
Bradlev 1 3QQ ..
Groombridge 1119
6 Cancri
22 Leonis Minoris.
Bradley 2993 S.P..
A Ursfe Majoris
Bradley 3147 S.P.
Groomb. 1841
Bradley 1672
Groomb. 1119
v Cancri
Bradley 1399
Piazzi IX. 254
Bradley 2993 S.P.
46 Leonis Minoris.
4 Comse
Bradley 1672 ...
4 Comas
Cephei 51
Bradley 1672
4 Com<e
Bradley 3147 S.P.
92 Leonis
8 Geminorum
XUrsseMin. S.P...
8 Geminorum
Bradley 1672
Virsinis. . .
X Ursse Min. S.P. .
< Geminorum
Groomb. 3548 S.P.
9 Leonis
Bradley 1672
21 Comae
Polaris S P .
Groomb. 1986
Polaris S.P
Bradley 1399
t Leonis
Groomb. 1986
GREENWICH OBSERVATIONS, 15)02.
2 h
238 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Transit B. Values of n continued.
Date.
Names of Stars.
Position.
Tabular
R.A.-
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
Date.
Names of Stars.
Position.
Tabular
R.A.-
Obaerved
Transit.
Factors.
n
Apparent.
n
Adopted.
1902.
April 6
April 8
April 10
Piazzi IX '37.
Gr
E
E
W
w
W
w
w
w
w
w
w
E
W
E
E
E
W
W
E
W
W
w
E
E
W
W
w
w
eemvich.
m s
o. 8-28
o. 14-84
0.29-31
o. 1 4-64
0. 7'12
- o. 14-91
- o. 7-23
o. 14-91
o. 2-71
- - 14-55
- o. 36-51
- o. 1479
o. 36-01
o. 14-87
+ o. 18-90
o. 15-00
- o. 32-14
- o. 14-49
- I. 6-44
- o. 14-79
- ' 9-3I
- - 14-47
- o. 5-48
- o. 15-52
+ o. 3-40
- o. 15-53
- - 3T5 S
- - '5-53
+ 6-906
+ 0-501
-13-04
+ 0-64
+ 6-906
+ 0-501
+ 6-906
+ 0-501
+ 10-89
+ 0-76
-17-70
+ 0-67
-1770
+ o-54
+ 32-59
+ 0-50
-13-40
+ 0-81
-47 21
+ '54
-47-21
+ 0-86
-}- 6-905
+ 0-760
+ .0-89
+ 0-62
-13-04
-)- 0-6;
B
+ 1-024
+ P072
+ 1-216
+ 1-199
+ 1-169
+ 1-182
+ 1-160
+ 1-056
+ 1-242
+ 1-082
+ 1-141
+ 1-602
+ 1-843
( + .-76.)
+ 1-048
+ 1-127
+ 1-698
1902.
Apr. i o
April 12
\
April 13
Qrt
Bradley 2993 S.P..
35 Leonis M in oris..
Bradley 2993 S.P..
35 Leonis Minoris.
Groomb. 3548 S.P.
a Lyncis
Piazzi IX 37
enwic
W
W
w
w
E
E
E
E
W
W
W
W
w
w
E
E
E
E
W
W
W
w
w
w
E
E
E
E
h continue
m a
- o- 39' 8 5
o. 15-30
- o. 39-52
- o. 15-30
- o. 5074
o. 15-89
- 0. 3-65
- o. 16-45
+ o- 3'94
o. I 5-66
+ 0.46-87
o. 16-24
+ -45'57
o. 10-29
- o. 3-58
o. 1 6- 1 8
- o. 3-92
o. 16-18
+ o. 3-06
o. 16-30
0.41-98
- o. 15-50
- 0.49-87
o. 16-24
+ o. 50-27
o. 16-62
+ 0.48-71
- o. 16-58
I.
-13-04
+ 0-75
-13-04
+ 075
-16-99
+ 0-70
+ 6-906
+ "433
+ 10-89
+ 0-76
+ 32-59
+ 0-50
+ 32-59
+ 0-47
+ 6-906
+ 0-695
+ 6-906
+ 0-695
+ 10-89
+ 0-62
-13-04
+ '95
-17-70
+ o-54
+ 32-59
+ 0-50
+ 32'59
+ o-53
s
+ 1-780
+ 1-756
+ 1-970
+ 1-977
+ I- 935
+ 1-967
(+,-926)
/
( + 2-029)
+ ''974
+ 1-885
+ 1-894
+ 1-844
( + 2-084)
+ 2-036
B
+ I-963
+ 1-939
K Leonis
Bradley 2993 S.P..
37 Leonis Minoris..
Piazzi IX. 37 . ...
K Leonis
Piazzi XI. 17 ...
K Leonis
A. Leonis
Bradley 1300...
Bradley 1399
ft Leouis Minoris...
Bradley 3147 S.P..
v Ursse Majoris
Bradley 31478.?..
Piazzi XI. I ! I
Bradley 1672
4 Comae
[i Leojds Minoris...
Bradley 1672
4 Com*
Bradley 1672
21 COMISB .. .
Piazzi IX 37.
2 Ursas Min. S.P...
a Canum Vn
Pnliria M P
a Lyncis
Piazzi IX. 37
aLyncis
Polaris S.P
Bradlev MOO...
22 Leonis Minoris.
Bradley 2993 S.P..
A. Ursse Majoris
Bradley 3147 S.P...
Piazzi XI. in
Bradley 1672
Piazzi XIII. 27
Piazzi IX. 37...
38 Lvncis..
Bradley I iqq...
22 Leonis Minoris.
Bradley 2993 S.P..
22 Leonis Minoris
Bradley 1672
14 Comae
The values of n in Column 6, which are enclosed in brackets, depend on observations made for determination of screw value (see p. iSS). These have not been used
in forming the value in Column 7.
ERROR IN AZIMUTH.
239
Transit B Values of n continued.
Date.
Names of Stars.
Position.
Tabular
R.A.-
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
1902.
Apr. 1 3
Apr. 17
Apr. 1 8
Gree
Polaris S.P.
moid
W
E
W
E
W
W
W
W
E
E
E
E
W
W
W
W
W
W
.W
W
W
W
W
W
E
E
E
E
continued
in K
- i-47'3'
o. i6'8o
- 1.45-68
- - i5'95
o. 1 1 '50
o. 15-98
- o. 8-14
o. 15-84
o. 28-04
o. 16-09
+ o. 13-46
o. 15-89
+ o. 8-10
o. 16-27
- - 5475
o. 16-00
- 0.53-07
o. 16-00
o. 52-06
o. 1 6-00
- 0.52-51
o. 16-00
o. 11-15
o. 16-16
o. 6-oz
o. 1 5-98
o. 29-12
- o. 16-33
-47-18
+ 0-40
-47-18
+ 0-8o
+ 6-906
+ 749
+ 10-89
+ '95
-13-04
+ 0-69
+ 32-60
+ 0-88
+ 32-60
+ 0-53
-47-16
+ 0-87
-47-16
+ 0-87
-47-16
+ 0-87
-47-16
+ 0-87
+ 6-906
+ 0-695
+ 10-89
+ 0-95
-13-04
+ 0-75
(+>'9z)
+ 1-870
+ 0-728
+ 775
+ 0-870
+ 0-925
+ 0-760
( + 0-807)
+ 0772
( + -75)
( + 0-760)
+ 0-807
+ roo2
+ 0-928
S
+0-829
1902.
Apr. 1 8
Apr. 20
Apr. 22
Ore
Bradley 2993 S.P..
37 Leonis Minoris.
Bradley 31478.?..
enwie
E
E
W
E
E
E
W
W
E
W
E
W
E
W
E
E
W
W
E
E
E
E
W
W
W
W
E
W
h continuec
111 B
o. 28-74
o. 16-32
o. 30^84
o. i6;6i
o. 33-66
o. 16-04
+ o. 10-74
o. 15-90
+ o. 13-96
o. 16-06
o. 59-69
o. 16-15
i. 2-09
o. 16-15
o. 10-95
- o. 1 6-86
o. 7-06
- 0.16-53
o. 10-71
- o. 17-19
o. 6-31
o. 17-04
o. 29-20
o. 16-99
- 0.33-56
o. 16-97
- 0.35-90
o. 16-85
I.
-13-04
+ 0-64
-17-70
+ 0-39
-17-70
+ 0-97
+ 32-60
+ 0-88
+ 32-60
+ 0-90
-47-'7
+ 0-88
-47'>7
+ 0-88
+ 6-906
+ 0-468
+ 10-89
+ 0-76
+ 6-906
+ 0-501
+ 10-89
+ 0-72
-13-04
+ 0-65
-17-70
+ 0-67
-17-70
+ 0:87
8
fo-goS
+ 0-787
+ 0-944
+ 0-841
+ 0-947
( + 0-906)
+0-956
+ 0-918
-r-'935
+ I-OI2
+ 1-055
+ 0-892
+ 0-903
+ I-O26
a
+ 0-882
+ 0-927
+ 0-963
3? Comae..,
Polaris S.P
a Canum Ven
Piazzi IX. 37.
Bradley 3147 S.P..
59 Ursse Majoris. ..
Bradley 1672
10 Leonis Minoris..
Bradley 1399
2 Canum Ven
Bradley 1672
A. Ursse Majoris
Bradley 2993 S.P..
46 Leonis Minoris..
Bradley 1672 ...
R Canum Ven
Polaris S.P
9 Canum Ven
Polaris S P
2 Canum Ven
Bradley 1672
9 Canum Ven ....
Piazzi IX. 37
9 Leoiiis
Polaris S P
20 Canum Ven. ...
Polaris S P . .
Bradley 1399
|8 Leonis Minoris...
Piazzi IX 37
20 Canum Ven. ...
Polaris S P
20 Canum Ven. ...
Polaris S.P
20 Canum Ven. ...
Piazzi IX. 37
Bradley 1399
21 Leonis Minoris.
Bradley 2993 S.P..
33 Leonis Minoris.
Bradley 3147 S.P..
v Ursse Majoris
Bradley 3147 S.P. .
Groombridge 1841.
a Lyncis
Bradley 1399.
X Ursas Majoris
Bradley 2993 S.P..
35 Leonis Minoris.
f
240 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Transit B Values of n continued.
Date.
Names of Stars.
Position.
Tabular
R.A.-
Observed
Transit.
Factors.
n
Apparent
n
Adopted.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n n
Apparent. Adopted.
1
1902.
Apr. 22
Apr. 2 3
Apr. 24
Gn
Bradley 1672
2 Canum Ven ....
enwii
W
W
E
E
E
E
W
E
E
E
W
W
W
W
E
\V
W
W
W
W
E
E
W
W
W
W
E
E
K
E
h continue
in a
+ o. 1 1 -07
o. 16-65
+ o. 16-55
o, 17-12
- I. 9-73
- o. 16-81
- o- 57'07
- o. 16-81
o. 10-84
- c. i?'37
- o. 7-24
o. 17-28
o. 30-08
- o. 17-29
o. 36-41
- o. 17-03
- - 34'54
- o. 17-03
+ o. 12-69
- o. 16-84
o. 33-18
o. 17-22
- o. 31-56
- o. 17-05
- ' 777
o. 17-08
1. 1 1-84
o. 17-02
- o. ir-44
- o. 17-67
d.
+ 32-61
+ 0-88
+ 32-61
+ '55
-47-I5
+ 0-88
-*7'i$
+ 0-88
+ 6-906
+ 0-501
+ 10-89
+ 0-62
-13-04
+ 0-65
-17-70
+ 0-79
-17-70
+ 0-79
+ 32-61
4- 0-88
'3'4
+ 0-8 1
-13-40
+ 0-81
-47-14
+ 0-86
-47-14
+ 0-92
+ 6-906
+ 0-450
a
+ 0-8 7 4
+ I-050
+ no2
+ 0-838
+ 1 -020
+ 0-978
+'934
+ 1 -048
+ "947
+ 0-930
+ 1-123
+ I-O2I
+ 1-056
+ I-I4I
+ o 965
+ 1-031
1902.
Apr. 24
Apr. 28
On
Bradley 3147 S.P. .
58 Ursae Majoris. .
Bradley 3147 S.P..
Groombridge 1830.
Bradley 1672
>enwit
W
W
E
W
W
W
E
E
E
E
W
W
W
W
E
W
E
E
W
W
W
W
E
W
W
W
E
E
h continue
in s
o. 34-10
o. 16-96
o. 36-96
- o. 17-32
+ o. 13-14
o. 17-08
+ o. 18-13
o. 17-69
- o. 33-10
- o. 17-42
o. 30-91
- . '7'53
- ' 5-64
- o. 17-13
I. 1 1-24
- o- 17-13
Paris.
- ' 39-59
o. 51-68
- '-4''49
- o. 5I-47
- 1.29-65
- -5 z 73
- I.27-95
- 0.52-67
- 2- 5 6 '57
- 0.52-12
- 2-53'07
- o. 52-04
i.
-17-70
+ 0-96
-17-70
+ 079
+ 32-61
+ 0-88
+ 32-61
+ 0-50
-13-40
+ 0-81
-13-40
+ o-54
-47-14
+ 0-98
-47-14
+ 0-98
-1770
+ 0-96
-17-70
+ 0-95
-13-40
+ 0-54
-13-40
+ '54
-47'i3
+ 0-77
-47''3
+ 0-81
8
+ 0-919
+ 1-062
+ 0-952
+ 1-116
+ 1-103
+ 0-960
+ 1 -008
+ 1-124
+ 2-568
+ 2-682
+ 2-648
+ 2-531
+ 2-598
+ 2-525
|
+ 1-017
+ 2-592
Bradley 1672
14 Comse ...
Polaris S.P
19 Canum Ven
Polaris S.P
2 Canum Ven
Bradley 1 672
19 Canum Veil
Piazzi IX. 37
1 3 Comae
2 Ursse Min. S.P...
K Leonis
2 Ursae Min. S.P. ..
Bradley 1309
22 Leonis Minoris.
Bradley 2993 S.P..
33 Leonis Minoris.
Bradley 3147 S.P..
Groombridge 1830.
Bradley 3147 S.P..
Groombridge 1830.
Bradley 1672
Polaris S P
Piazzi XIII. 71....
Polaris S.P.. ..
Piazzi XIII. 71....
Bradley 3 1 47 S.P..
58 Ursse Majoris...
Bradley 3147 S.P..
67 Ursae Majoris...
2 Ursae MinorisS.P.
30 Coma?
2 Canum Ven
2 Ursae Min. S.P...
a Canum Ven
2 Ursae Min. S.P..
15 Canum Ven
Polaris S.I'
2 Ursae Minoris S.P.
Piazzi XIII. 27 ....
Polaris S.P
Groombridge 2008
Piazzi IX. 37
t Leonis
Polaris S.P
Groombridge 1986.
Polaris S P
Groombridge 2043.
ERROR IN AZIMUTH.
241
Transit B- Values of n continued.
Date.
Names of Stars.
a
f O
Tabular
R.A.-
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
j
Factors.
n
Apparent.
n
Adopted.
1902.
Apr. 29
May i
May 3
Sept. 21
/
Bradley i 399
'aris-
W
W
W
W
E
E
W
W
W
W
E
W
W
W
E
E
W
W
E
E
E
K
W
W
Gr
E
E
W
W
-continued.
IU S
o. 25-82
- 0.5176
1.28-10
o. 52-88
- 1. 30*65
- o. 5>'73
+ o. 16-98
- o. 51-83
i. 22-60
- o. 52-09
I. 21-36
- o. 52-24
- 2- 34'4I
o. 52-28
- 2. 32-70
- o. 52-24
- I.37-87
- o. 52-58
+ o. 22-83
- o- 53'7
- 1.25-68
- o. 53-07
- 2.49-05
- o. 52-50
eenwich.
+ o. 6- 1 1
+ o. 5-43
+ o. 5-40
+ o. 5-49
+ 10-89
+ 0-87
-I3-04
+ '44
-17-70
+ 0-96
+ 32-62
+ 0-88
-13-40
+ 0-81
-13-40
+ o'74
-47-05
+ 077
-47-05
+ 0-77
-17-70
+ 0-67
+ 32-62
+ 0-50
-13-40
+ 0-53
-47 ii
+ 075
- 6-898
+ 0-950
- 6-898
+ 0-894
B
+ 2- 5 89
4 2-612
+ 2-086
+ 2-168
+ 2-147
+ 2-059
+ 2-136
+ 2-IOI
+ 2-465
+ 2-363
+ 2-341
+ 2-435
0-087
+ 0-012
8
+ 2'6oi
+ 2-116
+ 2-401
0-038
1902.
Sept. 22
Sept. 23
Ore
Cephei 51 S.P
enwic
E
E
W
E
W
E
E
E
E
E
W
W
W
W
W
W
E
E
E
E
W
E
E
E
E
E
E
E
E
E
h continuec
m a
+ o. 4-86
+ o. 5-43
+ o. 6-04
+ o. 5+3
+ o. 4-38
+ o. 5-46
+ o. 579
+ o. 5-46
- o. 0-43
+ o. 5-38
+ o. 7-00
+ o. 5-65
+ o- 5^7
+ o. 5-54
+ o. 5-72
+ o. 5-61
+ o. 4-33
+ o. 5-40
+ o. 5-89
+ o. 5-51
+ o. 6-14
+ o- S-Si
+ o. 5-16
+ o. 5-64
+ o. 2-46
+ o. 5-59
+ o. 5-39
+ o. 5-54
+ o. 770
+ o. 5'54
1.
20-41
+ 0-56
20-41
+ 0-56
+ 57'30
+ 0-79
+ 57-30
+ 079
-52-99
+ 075
+ 6-393
+ 0-624
+ 7-288
+ 0-573
- 6-898
-i- 0-476
10-87
+ 0-76
+ 13-06
+ 0-43
+ 1774
+ 0-47
+ '774
+ 0-92
10-87
+ 0-64
-10-87
+ 0-76
+ >3'4 2
+ 076
8
+ 0-027
0-O29
O'Oig
+ O'O06
+ O'IO2
+ 0-234
+ 0-064
+ 0-042
+ 0-092
+ 0-030
+ 0-036
O-O29
( + 0-272)
+ 0-013
+ 0-I7I
8
+ 0-034
+ O-O6O
Piazzi IX. 254. . ...
Bradley 2993 S.P..
41 Leonis Minoris..
Bradley 3 147 S.P..
58 Ursfe Majoris...
Bradley 1672
Cephei 51 S.P
Q Cvcni ..
A Ursse Minoris....
Groombridge 2389.
A, Ursse Minoris....
Groombridge 2389.
Grooinb. 1 1 19 S.P.
2 c Cvcni .
2 Canuni Ven
2 Ursa3 Minoris S. P.
a Canum Ven
2 UrsaeMinorisS.P.
14 Canum Ven
Polaris S.P
A.Q Cveni...
Cveni . .
Grooinbridge 1986.
Polaris S.P
Piazzi IX. 37 S.P...
Piazzi XIII. 136...
Bradley 3147 S.P..
v Ursse Majoris
Bradley 1672
Bradley 13998.?..
i LacertsB
Bradley 2993
X Peeasi . .
"Rradlpv -i \A~J
1 2 Gornse
2 Ursse Minoris'S.P-
3 1 Comse
c6 Peeasi ..
Tiradlev 3IJ.7
Polaris S.P
L Andromedae ..
Bradley 1399 ^.P-
7T 2 Pecrasi .
25 Canum Ven
Piazzi IX. 37 S.P..
f Cvsrni. . .
Bradley i 399 S.P..
Piazzi IX. 37 S.P...
o Andromedse
Bradley 2997
i Lacertse
Between the observations on April 29 and May i, the instrument was adjusted in Azimuth and Level.
Sept. 22. Bradley 2701. The Observer noted this as a bad observation. It has been given a weight of i in forming the Adopted n.
242 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Transit B Values of n continued.
Date.
Names of Stars.
Position.
Tabular
R.A.-
Observed
Transit.
Factors.
n
Apparent
n
Adopted.
Date. Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent.
n
Adopted
1902.
Sept. 23
Sept. 24
Sept. 2 5
Gre
Bradley 2003...
emoic
W
E
W
W
E
W
E
W
W
W
W
W
E
W
E
E
E
E
E
E
W
W
E
W
W
W
E
W
W
E
h continuec
m 8
+ o. 5-88
+ o. 5^4
+ o. 6 45
+ o. 5-58
+ o. 7-07
+ o. 5-58
+ o. 3 -6 1
+ o. 5'55
+ o. 5'93
+ o- 5'55
+ o. 0-68
+ o- 5'55
+ o. 4-20
+ o. 5-64
+ o. 5-07
+ o. 5'39
+ o. 5-48
+ o. 5-40
+ o- 5 '44
+ o. 5-48
+ o. 5-21
+ o. 5-51
+ o. 4 <6 3
+ o. 5-56
+ o. 6-23
+ o. 5-55
+ o. 7-10
+ o. 5-41
O. 0'2O
+ - 5'53
1.
+ I3-07
+ 076
20-41
+ 0-76
20-41
+ 0-76
+57-31
+ 0-66
+ 57-3I
+ 0-66
-52-99
+ 075
-52-99
+ '49
+ 6-385
+ 0-525
-6-898
+ 0-809
- 4-^5
+ 0-522
+ 1774
+ 0-43
+ I7-74
+ 0-55
-32-52
+ '54
-32-52
+ 0-85
+ 57'3'
+ 0-68
s
+ 0-028
0-041
0-070
-0-034
+ 0-007
+ 0-091
+ 0-027
-0-055
O'OIO
+0-007
0-017
-0-054
0-021
0-051
O'lOI
B
0-OI4
1902.
Sept. 25
Sept. 26
Gre
A. Ursse Minoris
9Cvrni
envric
E
E
E
E
W
W
W
W
W
W
W
W
W
E
E
E
E
E
W
E
W
W
W
W
E
E
W
E
W
E
E
E
h continuec
m s
+ o. 3-07
+ o. 5-50
+ o. 5-37
+ o. 5-51
+ o. 7-14
+ o. 5-58
+ o. 5-10
+ o. 5-57
+ o. 5-38
+ o. 5-63
+ o. 5-67
+ o. 5-63
+ o. 3-23
+ o. 5-32
o. 0-67
+ o. 5-38
+ o. 6-98
+ o. 5-38
+ o. 7'33
+ o. 5-50
+ - 5-35
+ o. 5-64
+ o. 4-60
+ o. 5-67
+ o. 4-22
+ o- 5-59
+ o. 3-59
+ o. 5-64
+ o. 7-48
+ o. 5-64
+ o. 8-95
+ 0- 5'59
1.
+ 57-31
+ 0-56
-52-98
+ 0-75
-52-98
+ 0-39
+ 6-394
+ 0-624
+ 7-281
+ 0-730
- 6-898
+ 0-863
+ 57-31
+ 0-79
+ 57'3<
+ 0-70
-52-98
+ 75
-52-98
+ o'49
+ 7'279
+ 0-624
+ 13-07
+ 0-63
+ 1774
+ 0-62
+ '774
+ o-43
-3 2- 5*
+ o 4 43
-32-52
+ 0-62
8
-0-043
+ O-OO3
O-O29
O'OSl
-0-038
O-OO5
-0-037
O-I07
O-O3O
-0-034
-0-044
-0-086
0-080
-0-118
0-056
O'lOI
0-036
-0-072
I Lacrtse
Cephei 51 S.P
Groombr. 1 1 19 S.P.
2 c Cvcrni
1 1 Cygni...
Groombr. 1 1 198. P.
Lalande 39329
Cephei 51 S.P
ic Cygni...
Bradley 2701
A. Ursse Minoris ...
v Cveni...
4-Q Cvffni...
A. Ursse Minoris ...
X Cygni . . .
54. Cyeni ..
Piazzi IX. 37 S.P..
v Cvcni
Groomb. 1 119 S.P.
2C Cygni...
XUrsee Minoris
Groombr. 2889
A. Ursse Minoris....
T/l Cygni
Groomh. 1119 S.P.
20 Vulpeculse
75 Draconis
Piazzi IX. 37 S.P..
Groombr. 1 1198. P.
25 Cygni
Bradley 1508 S.P..
Groombr. 1119 S.P
20 Vulpeculee
76 Draconis
49 Cygni
Bradley 3147
Bradley 2007...
38 Pegasi
Bradley 16728.?..
Bradley 3147
67 Pegasi
Bradley 1672 S.P..
23 Andromedee
A, Ursse Minoris....
8 Cygni
Bradley 3147...
T Pegasi
Bradley 16728.?..
Bradley 16728.?..
ERROR IN AZIMUTH.
Transit B Values of n continued.
243
Date.
Names of Stars.
Position.
Tabular
R.A.-
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
Date.
Names of Stars.
Tabular
.2 R.A.
g Obserxed
Transit.
Factors.
n
Apparent.
n
Adopted.
1902.
Oct. 6
Oct. 7
Oct. 8
Oct. 9
Groombr. 1 1 198. P.
cj. Cveni..
1
E
W
vv
W
W
W
W
W
E
E
W
W
E
E
E
E
W
E
E
E
W
W
E
E
W
W
E
E
E
E
3 am.
HI 8
O. 3O-OO
+ o. 3-05
o. 34-08
+ o. 3-05
+ o. 7'35
+ o. 2-97
- o- z'43
+ o- 3-i5
+ o. 10-42
+ o. 2-92
- o- 4^5
+ o. 3' 11
+ o. 9-69
+ o. 2-85
+ o. 13-50
+ o. 2-63
+ o. 1472
+ o. 271
o. 18-40
+ o. 2-84
0. 2I-l6
+ o. 2-92
+ - 9'57
+ o. 2-39
+ o. 9-85
+ o. 2-56
+ o. 4-40
+ o. 2-31
+ o. 9-69
+ o. 2-32
-52-96
+ 73
-52-96
+ 73
+ 7^79
+ c'574
- 6-897
+ 0-809
+ 13-07
+ 0-63
-10-87
+ 076
+ 13-07
+ 0-63
+ 1774
+ 0-47
+ '774
+ 0-46
-3 2 '49
+ 0- 54
-3^49
+ 0-56
+ '775
+ 0-45
+ 775
+ 0-55
+ 6-384
+ 0-698
+ 17-07
+ '57
8
+ 0-616
+ 0-692
+ 0-653
+ 0724
+ 0-603
+ 0-693
+ 0-550
+ 0-629
+0-695
+ 0-643
+ 0728
+ 0-415
+ 0-424
+ 0367
+ o-447
8
+ 0-650
+0-656
+0-420
+0-407
1902.
Oct. 10
Oct. 1 3
Oct. 14
F
76 Draconis
Piazzi XXI. I
'aris-
W
W
W
W
E
E
E
E
E
E
W
W
E
E
W
W
E
W
E
E
W
W
W
W
W
W
E
E
E
E
-continued.
m s
+ o. 4-29
+ o. 2-04
+ o. 7-56
+ O. 2-10
+ o. 776
+ o. 2-15
o. 0-04
+ o. 2-15
o. 1-96
+ o. 2-07
+ o. 6-40
+ o. 2-16
+ o. 8-. 5
+ O. 2-O2
- o. 9-54
+ o. 2-24
- o. 9-85
+ o. 2-03
+ o. 8-98
+ o. 1-69
- o. 1-37
+ o. 1-83
+ o. 7-15
+ o. 1-94
+ o. 9-4.8
+ o. 1-89
+ o. 8-07
+ o. 1-92
~ o. no
+ o. 1-98
+ 7-280
+ 0-573
+ 17-04
+ 0-57
+ 17-04
+ 0-53
- 6-897
+ 0-534
-10-86
+ 0-47
+ 13-07
+ 0-8 1
+ 1775
+ 0-55
-32-49
+ 0-65
-3Z-49
+ 0-50
+ 17-04
+ 078
- 6-897
+ 0-429
+ i3'7
+ 0-64- '
+ 17-04
+ 0-57
+ 17-04
+ 078
- 6-897
+ 0-839
8
+0-321
+0-332
+0-340
+0-295
+0-355
+0-346
+0-356
+0-356
+ 0-360
+0-448
+0-437
+0-419
+0-461
+0-378
+0-398
i
+ 0-340
+0-438
Grooiubr. 1 1 198. P.
C4. Cvsni...
Groombridge 3548.
/ Gvffni
76 Draconis
Groombridge 3548.
72 CvErni
Cveui . .
Piazzi IX. 37 S.P..
o- Cygni ..
Piazzi IX. 37 S.P..
72 Cvt?ni
Bradley 2007...
Bradley 1 399 S.P..
Bradley 2851
38 Peeasi .
Bradley 1 399 S.P..
I Lacertse
Bradlev 200,3 ..
8 Lacertiy.
Bradlev si 47 ..
Bradley 2903
78 Pegasi
38 Peeasi .
Bradley 1672
Bradlev 3 14.7
Lalande 47034
Bradley 1672
c6 Peeasi ..
Bradley 3147
85 Pegasi .
\!/ Peeasi . .
Groombridge 3548.
Bradley 1672 S.P..
a Andromedse
Bradley 1672 S.P..
2 8 Andromedte
Bradley 3147
T Pecrasi
Piazzi IX. 37 S.P..
2 Peeasi . .
Bradley 2993
71 Pegasi
Groombridge 3548.
t Cveni
Bradley 3147
78 Pegasi
7 5 Draconis
Groombridge, 3548.
72 Cygni
Piazzi IX. 37 S.P..
47 Cvgni..
Groombridge 3548.
Cyeni
74 v - / yg ni
244 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Transit B Values of n continued.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent.
Adopted.
Date.
Names of Stars.
Position.
Tabular
R.A.-
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
1902.
Oct. 14
Oct. 15
Oct. 1 6
Oct. 17
/
Bradley 13998.?..
i Lacerte ... .
Vzm-
E
E
w
E
E
E
W
W
W
W
E
W
E
E
W
E
W
W
E
W
E
E
E
E
W
W
E
E
E
E
-continued.
m s
- o. 277
+ o. 1-86
+ o. 8-05
+ o. 1-84
+ o. 9-08
+ o. 178
+ o. 10-65
+ o. 1-88
- o- J5-35
+ o. i '90
o. 14^42
+ o. 1-96
o. 2-91
+ o. 1-46
+ o- 774
+ o. 1-46
o. 13-84
+ o. 1-46
o. 12-17
+ o. 1-46
+ o. 7-20
+ o. 1-59
+ 0. 2 I -07
+ - I- 55
+ 0.23-94
+ o. 171
+ o- 3'57
+ o. 1-63
- o. 1-94
+ - I- 54
10-87
+ 076
+ 13-07
+ '45
+ I77S
+ 0-62
+ 1775
+ '55
-3*'47
+ 0-85
-32-47
+ 0-65
10-86
+ 0-76
+ 13-07
+ 0-43
-32-47
+ 0-46
-32M7
+ 0-46
+ I3-4 1
+ o'57
+47-30
+ 0-50
+ 47'30
+ 0-65
+ 5-160
+ 0-506
- 6-897
+ 0-574
8
+ 0-3 9 8
+ 0-492
+ 0-426
+ 0^10
+ 0-5I8
+0-495
+ 0-376
+ 0-497
+0-465
+0-414
+ 0-437
+ 0-417
+0-477
+ 0-417
+0-467
s
+ 0-457
+ 0-437
+ 0-446
1902.
Oct. 17
Oct. 2 1
Oct. 22
P
Bradley 2993
aris-
W
W
W
w
E
E
E
E
W
W
W
W
E
E
E
E
W
W
E
W
W
w
w
w
w
w
E
E
W
W
W
w
-continued.
Ill S
+ o. 8-59
+ o. i '60
+ o. 10-97
+ o- ''57
+ o. 8-32
+ o. 1-37
o. 13-88
+ o. 1-58
- o. 15-65
+ o. 1-63
+ o. 8-55
+ o. 171
+ o. 7-65
+ o. 1-72
- o. 2-45
+ o. 1-07
- o. 5-17
+ o. 0-99
+ o. 7-44
+ o. 0-96
+ o. 9-47
+ o. 0-94
+ o. 6-84
+ o. 0-97
+ 0.23-52
+ o. 0-93
+ o. 24-08
+ o. 1-03
+ o. 3-56
+ o. 0-96
- 0.10-53
+ o. 0-96
+ 13-07
+ 0-64
+ 17-75
+ 0-52
+ 1775
+ 0-46
-32-47
+ 0-59
-32-47
+ 0-98
+ 13-42
+ 075
+ 13-42
+ 0-59
- 6-897
+ 0784
-10-86
+ 0-64
+ 13-07
+ 0-63
+ 1775
+ 0-46
+ 13-42
+ 0-57
+ 47-3
+ 0-50
+ 47-30
+ 0-75
+ 5''6i
-h 0-548
-23-94
+ 0-51
a
+ 0-563
+ 0-546
+ 0-402
+ 0-468
+ 0-5I7
+ 0-540
+ 0-462
+ 0-458
+ 0-536
+ 0-52I
+ 0-493
+ 0-457
+0-483
+ 0-495
+ 0-563
+ 0-470
H
H-0'496
+ 0-503
+ 0+94
7]-2 Pecrasi
Bradley 200 i ..
Bradlev ^ 1 4.7
/x Pegasi
R Pefasi
Bradley 3147 ..
Bradlev 3 14.7 ..
67 Pegasi
Bradley * i <t? .
Bradley 16728.?..
8 Andromedse
Bradley 1672 S.P..
Groom bridge 140...
2 Ursse Minoris
W.B. (2) 0. 1172..
2 Ursse Minoris....
w. Andromedse
78 Pegasi ..
Bradley 1672 S.P..
23 Andromedse ....
Bradley 1672 S.P..
TT Andromedse
Bradley 1 399 S.P..
i Lacerte ....
Piazzi IX. 37 S.P...
72 Cygni
Bradley 2993
Bradley 1672 S.P..
\1/ Pesasi...
Bradley 1399 S.P..
Bradlev 200.3 ..
Bradley 1672 S.P..
iA Peeasi...
38 Pe^asi
Bradlev 314.7...
2 Ursse Minoris. . . .
T Piscium
\l/ Pesasi...
2 Ursee Minoris ...
T Piscium
Polaris
Polaris
Polaris
e Trianguli .
Polaris
Cephei 47 . .
41 Arietis
Piazzi IX. 37 S. P.
i Cycni
55 Arietis
Grooml). 2283 S.P
ERROR IN AZIMUTH.
Transit B Values of n continued.
245
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
Date.
Names of Stars.
Position.
Tabular
R.A.-
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
1902.
Oct. 25
Oct. 26
Oct. 27
Oct. 29
Bradley 1672 S.P.
Piazzi 0. 74
Gi
W
w
W
W
E
E
W
W
E
E
E
E
W
W
E
W
W
W
W
w
E
E
E
E
W
E
E
E
eenwiclt.
m s
o. 17-20
+ o. 4-69
+ d. 14-09
+ . 4-69
+ o. n-86
+ o- 4^3
o. 16-52
+ o. 4-48
+ o. 12-68
+ o- 4'3 6
+ o. 11-59
+ o. 4-30
+ 0.36-56
+ o. 4-42
+ o. 29-77
+ o. 4-65
+ o- i5''9
+ o. 470
- - 3^6
+ o. 4--1-5
+ 0- 1277
+ o- 4'4>
+ o. 16-09
+ - 4 - 25
+ o. 15-98
+ o. 4-65
O. 2 1^96
+ o- 4'45
-32-46
+ 0-96
+ >3'4 2
+ 0-78
+ 13-4*
+ 7
-32-46
+ 0-96
+ 13-42
+ 0-70
+ 13-42
+ o-59
+47-35
+ 0-76
+ 47-35
+ 0-87
+ 17-05
+ 0-84
-10-86
+ 0-64
+ 13-07
+ 0-63
+ 17-76
+ 0-43
+ 17-76
+ 0-92
-32-45
+ 0-85
s
+ 0-655
+ 0-744
+ 0-576
+ 0-629
+ 0-654
+ 0-569
+ 0-690
+ 0-540
+ 0-647
+ 0-697
+ 0-672
+ 0-683
+ 0-673
+ 0793
8
+ 0-638
+ 0-642
+ 0-623
+ 0703
1902.
Oct. 29
Out. 30
Nov. i
Nov. 2
Oft
Bradley 16728.?..
28 AiiiJromedse
2 Ursae Minoris....
LL AndroniedtU . . .
enwii
W
W
W
w
E
E
W
W
E
E
W
W
W
w
E
W
W
w
E
W
W
w
E
E
E
W
W
W
h continuec
w s
o. 18-58
+ o. 4-38
+ o. 13-99
+ o. 4-66
- o. 0-55
+ o. 4-43
o. 2-70
+ o. 4-19
+ 0. 12-21
+ o. 4-23
+ O. I 2'6 I
+ o- 4'39
+ o. 16-42
+ o. 4-28
- o. 1578
+ 0- 4'37
- o- z-75
+ o. 4-29
+ o. 1175
+ o. 4-29
+ o. 9-91
+ o. 4-25
+ o. 15-38
+ o. 4-32
+ o. 16-21
+ o. 4-25
- o. 1-39
+ o. 4-55
1.
-32-45
+ 0-56
+ 13-42
+ 078
- 6-897
+ 0784
-10-86
+ 0-76
+ i3'07
+ 0-46
+ 13-07
+ 0-81
+ '775
+ 0-55
-32-45
+ '54
10-86
+ 0-76
+ 13-07
+ 0-76
+ 13-07
+ 0-63
+ 1776
+ 0-92
+ 17-05
+ 0-86
6-90
+ o-93
B
+ 0-696
+ 0-738
+ 0-648
+ 0-593
+ 0-633
+ O-670
+ 0706
+o-6n
+0-606
+ 0-606
+ o-455
+ 0-657
+ 0739
+ 0-759
s
+0-644
+0-582
+ 0-760
2 Ursse Minoris....
/j. Andromeda;
2 Ursse Minoris
J3 Andromedse
Piazzi IX. 37 S.P.
Bradley 1672 S.P.
Bradley 1399 S.P.
i Lacertse
2 Ursse Minoris....
ft Andromedie
Bradlev 200?
v Pegasi
2 Ursse Minoris
8 Andromedaa
Bradley 2993
8 Lacertse
Bradley 3147
78 Pegasi
Bradley 1672 S.P..
a Andromedse ....
47 Andromedse
Polaris
Bradley 1399 S.P..
i Lacertse
50 Andromedse
Groombridge 3548.
74. Cvcni...
Bradley 2993
Bradley 1399 S.P..
TT , Pe^asi . .
Bradley 2993
Bradley 2993
38 Pe^asi
Bradlev 314.7
38 Pe u asi
Bradley 3 14.7...
i Andromedse
Groombridge 3548.
77 Cv?ni
T Pegasi . ...
Bradley 3147
i Andromedse
Bradley 16728.?..
23 Andromedse
Piazzi IX. 37 S.P..
7C Cvsni
GREENWICH OBSERVATIONS, 1902.
2 i
246 TELEGRAPHIC DETERMINATION OP LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Transit B Values of n continued.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
1902.
Nov. 2
Nov. 3
Nov. 4
Or
Bradley 1399 S.P..
7r 2 Pegasi
tenwi
W
W
E
E
E
E
W
E
E
E
W
W
W
W
;ft continue
m B
- o. 4-70
+ o. 4-30
+ o. 13-72
+ o. 4'3
- o. 3-93
+ o. 4-21
+ o. 11-45
+ o. 4-31
+ o. 12-33
+ o. 4-21
- o. 3-58
+ o. 3-99
+ o. 0-67
+ o. 4-19
d.
10-86
+ 0-64
+ 13-07
+ 0-63
10-87
+ 0-64
+ 13-07
+ 0-80
+ 13-07
+ 0-88
-10-86
+ '43
- 4-822
+ '835
8
+ 0-783
+ 0757
+ 0707
+ 0-582
+ 0-667
+ 0-67I
+ O-622
8
+ 0-635
1902.
Nov. 4
Or
Bradley 3147 ...
lenwi
E
E
W
E
E
E
W
W
W
W
E
E
E
E
W
W
;7i continue
m B
+ o. 14-91
+ o. 4'4
+ o. 15-67
+ o. 4-0 1
o. 16-61
+ o. 4-00
o. 16-88
+ o. 3-90
+ 0. I2'80
+ o. 4-00
+ o. 11-47
+ o. 4-09
+ o. 32-95
+ o. 4-01
+ o. 33-05
+ o. 4' '4
d.
+ 17-76
+ 0-80
+ 1776
+ 0-55
-32'44
+ 0-54
-3^44
+ 0-65
+ 13-42
+ 0-78
+ 13-42
+ 0-70
+ 47-38
+ 0-76
+ 47-38
+ 75
I
+ 0-641
+ 0-677
+ 0-625
+ 0-628
+ 0-696
+ 0-580
+ 0-621
+ 0-620
I
+ 0-635
14 Andromedse
Bradley 3 147.
Bradlev 2001 ..
38 Peeasi.
78 Pegasi.
Bradley 1399 S.P..
7r 2 Pegasi
Bradley 1672 S.P..
a Andromedae
Bradley 1672 S.P..
IT Andromedse
2 Ursse Minoris....
H Andromeda;
2 Ursse Minoris....
/3 Andromedse
Polaris
Bradley 2993
10 Lacertse
Bradley 2093 ..
1 3 Lacertas
Bradley 1399 S.P..
A. Pe^asi .
47 Andromedse
Polaris
Bradley 1508 S.P..
Groombridge 3919.
Piazzi I. 104 ....
Transit O Values of n.
Mar. 17
A. Ursa; Min. S.P...
6 Cancri
Grew
E
W
W
W
E
E
E
E
iwich.
o. 8-42
o. 12-46
+ o. 3-76
- o. 12-45
- 0.13-23
o. 12-56
- o. 11-45
- o. 12-44
-56-66
+ '53
-56-66
+ 0-40
- 6-386
+ 'SS7
-16-99
+ 0-76
O-O7I
0-284
+ 0-097
O-O56
-0-034
Mar. 1 7
Gn
Bradley 3147 S.P..
5 1 Ursa Majoris....
Bradley 31478.?..
email
E
E
W
W
W
W
W
W
h continue
o. 12-58
o. 12-52
- o. 9-43
- o. 12-45
o. 13-22
o. 12-46
- o. 15-38
o. 12-41
d.
-1771
+ 0-80
-17-71
+ 0-40
+ 32-55
+ 0-50
+ 3z'55
+ 0-88
0-003
+ 0-167
0-024
( 0-094)
A. Ursa; Min. S.P...
/A Cancri
Bradley 2701 S.P..
i Cancri
Bradley 1672
Groomb. 3 5 48 S.P.
38 Lyncis
Bradley 1672
ERROR IN AZIMUTH.
Transit C Values of n continued.
247
Date. Names of Stars.
Position.
Tabular
R.A.-
Observed
Transit.
Factors.
1
n
Apparent
n
. Adopted.
Date.
Names of Stars.
1
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent
n
. Adopted.
1902.
Mar. 1 9
Mar. 2 o
Gi
XUrsse Min. S.P...
v Geminorum
eemm
E
W
W
W
W
W
W
W
E
E
E
E
E
E
E
E
W
W
W
W
W
W
W
W
W
E
E
E
E
E
eh continue
m 8
- 0.36-93
o. 11-98
o. 32-62
o. 1 1-96
o. 32-63
0. I2'O2
+ o. io- 1 8
O. IZ'IO
+ o. 11-52
0. I 2' I 4
o. 20-67
O. I2'OI
o. 6-60
0. I2'IO
o. 7-09
o. 11-88
o. 18-05
0. I 2 '04
o. 17-80
o. 12-05
o. 21-82
- o. 11-95
o. 20-71
- o. 11-95
o. 36-80
o. 12-26
- 0.39-19
o. 12-29
+ o. 16-56
O. 12-22
d.
-56-69
+ 0-51
-56-69
+ 0-70
-56-69
+ 0-67
+ 53-50
+ o'53
+ 53-50
+ 0-52
-16-99
+ 0-84
+ 10-88
+ 0-62
+ 10-88
+ 0-87
-13-04
+ 0-65
-13-04
+ 0-75
-17-71
+ 0-80
-17-71
+ 0-80
-56-69
+ 0-46
-56-69
+ 0-48
+ 53-50
+ 0-58
a
+0-436
+ 0-360
(+0-359
+0-420
+0-447
+0-486
+0-536
(+ 0-479)
+0-439
+ '4!7)
+ 0-533)
+0-473
+ 0-429
+0-471
+0-544
a
+0-450
+0-481
1902.
Mar. 20
Mar. 2 1
Mar. 22
Gl
Groomb. 3548 S.P
a Lyncis ...
eenwi
W
W
E
E
E
E
E
W
W
W
W
W
W
W
E
E
E
E
E
E
W
W
W
E
E
E
E
E
W
W
c/i continue
m a
o. 20-40
0. 12-22
o. 19-61
o. 12-31
o. 19-40
o. 12-24
- 0.55-IO
o. 12-40
- 0-49-97
0. I2'U
+ o. 21-51
o. 12-40
o. 16-98
- o. 12-33
- o. 8-21
- 0.12-55
- o. 8-34
- o. 12-57
o. 5 -2 1
o. 12-46
o. 21-18
- o. 12-35
- o. 55-84
O. I2'6l
i. ri6
o. 12-85
+ 0.35-93
o. 12-99
- 0.27-17
o. 12-83
d.
-16-99
+ 0-70
-13-04
+ 0-65
-I3'04
+ 0-75
-56-69
+ 0-52
-56-69
+ Q'95
+ 53'5
+ 0-52
- 6-386
+ 0-791
+ '6-905
+ 0-463
+ 6-905
+ 0-495
+ 10-88
+ 0-62
-13-04
+ 0-65
-56-69
+ 0-67
-56-69
+ 0-51
+ 53-52
+ 0-48
-16-99
+ 070
B
+ 0-462
+ 0-533
(+ 0-519)
+ 0-746
+ 0-657
+ 0-641
+ 0-648
+ 0-674
+ o'66o]
+ 0-707
+ 0-645
+ 0-753
+0-845
+0-922
+o'8n
r " '
+0-679
+0-853
X Ursre Min. S.P. .
o Geminorum
Bradley 2993 S.P..
33 Leonis Minoris..
Bradley 2993 S.P..
35 Leonis Minoris..
X Ursae Min. S.P...
\ Cancri
XUrsfcMin. S.P..
TT Guminorum
Groombridge 1 119,
6 Cancn
Groombridge 1119.
X Cancri
X Ursas Min. S.P...
3 1 Lyncis
Groomb. 3548 S.P.
1 6 Leonis Minoris..
Bradley 1399
Groombridge 1119
X Cancri
Bradley 3701 S.P..
11013 Lyncis
22 Leonis Minoris..
Bradley 1 3QQ...
Piazzi IX. 37
Piazzi IX. 254
Bradley 2993 S.P..
33 Leonis Minoris..
Bradley 2993 S.P..
35 Leonis Minoris.
Bradley 3147 S.P..
51 Ursae Majoris.. ..
Bradley 3147 S.I 5 ..
51 Ursae Majoris...
X Ursa?, Min. S.P....
K Geminorum
v Cancri
Piazzi IX. 37
i 3 Leonis
Bradley 1399
22 Leonis Minoris.
Bradley 2993 S.P.
33 Leonis Minoris.
X Visas, Min. S.P...
TT Geminonim
XUrsaaMin. S.P...
<t> Geminorum
Groombridge 1119
XUrsfeMin. S.P...
co Cancri
Groombridge 1119.
I C Cancri
Groomb. 3548 S.P.
248 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Transit G Values of n continued.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent
TO
Adopted.
Date.
Names of Stars.
Position.
Tabular
R.A.-
Observed
Transit.
Factors.
n
Apparent.
H
Adopted.
1902.
Mar. 22
Mar. 2 3
Mar. 2 5
Or
Bradley 1 399
lentcit
W
w
E
E
W
W
E
E
W
W
w
w
E
E
E
E
E
E
W
E
E
E
W
W
W
w
w
w
E
E
~:h continue
m g
- . 3-84
- o. 12-54
- 0.25-67
o. 12-76
o. 23-88
o. 12-94
0.24-85
o. 12-91
+ 0.23-83
- o. 12-88
o. 18-96
o. 13-02
o. 7-60
o. 13-00
- o. 3-40
o. 12-90
I. 8-09
- o. '3 - 39
- i. 2-23
- - '3'49
+ 0.34-23
- o. 13-23
- o. 19-13
o. 12-98
o. 28-93
o. 12-90
o. 26-65
o. 13-10
o. 25-21
- o. 13-23
1
+ 10-88
+ 0-84
-13-04
+ 075
-13-04
+ 0-50
-13-04
+ 0-54
-r-53'5*
+ 0-52
- 6-386
+ Q-455
+ 6-905
+ o'49S
+ 10-88
+ 0-64
-56-68
+ 0-51
-56-68
+ 0-37
+ 53-52
+ 0-58
- 6-385
+ 0-548
-16-99
+ 0-75
-13-04
+ 0-62
-13-04
+ 0-6 1
s
+ 0-863
+ 0936
+ 0-808
+ 0-879
+ 0-693
+ 0-868
+ 0-842
+ 0-928
+ 0-956
+ 0-854
+ 0-897
+ 0-887
+ 0-904
+ 0-992
+0-878
a
+ 0-83 3
+ 0-966
1902.
Mar. 25
Mar. 27
Mar. 28
On
Bradley 3147 S.P..
X Ursa; Majoris ....
Bradley 3147 S.P..
X Ursae Majoris....
Groombridge 1119.
v Cancri
>emci(
E
E
W
E
W
W
W
w
E
E
E
E
E
E
E
E
E
E
W
W
E
W
E
E
E
E
W
W
W
W
:h continue
in s
- 0.29-41
o. 12-90
o. 30-70
o. 12-90
+ 0. 2I-2O
- 0- '3'37
o. 18-59
o. 13-10
o. 10-88
- o. 1377
- o. 6-93
- o. i 3 48
- o- 7 + 1
o. i 3-60
o. 22-71
o. 13-28
0. 22'8O
o. 13-28
o. 28*14
- - '3'37
- o- *775
- - I3-37
+ o. 28-15
- - 13-5!
o. 19-20
- 0.13-50
o. 9-40
- o. I3M-4
o. 6-69
- 0-I3-59
J.
-13-71
+ I'OO
-13-71
+ i -oo
+ 53'5 2
+ 0-46
- 6-382
+ 0-791
+ 6-905
+ 0-468
+ 10-88
+ 0-87
+ 10-88
+ 0-62
-13-04
+ 0-95
-13-04
+ 0-95
-17-71
+ o-47
-17-71
+ 0-47
+ 53-5 2
+ 0-58
- 6-382
+ 0-791
+ 6-905
+ 0-695
+ 10-88
+ 0-64
8
+ IM22
+ 1'2IO
+ 0-65I
+ 0765
+ 0-449
(+0-&55)
+ 0-603
(+ 0-674)
+ 0-68I
+ 0812
+ 0-791
+ 0-787
+ Q-795
+0-651
+ 0-674
8
+ 0-687
16 Leonis Minoris.
Bradley 2993 S.P.
35 Leonis Minoris.
Bradley 2993 S.P.
/x Leonis
Bradley 2993 S.P..
44 Leonis Minoris.
Groombridge 1119.
X Cancri
Bradley 2701 S.P..
11013 Lyncis
Piazzi IX. 37
9 Leonis
Bradley 2701 S.P..
v^ Cancri
Bradley i 300...
Piazzi IX 254
Piazzi IX. 37 ..
Bradley 1399
13 Leonis
22 Leonis Minoris..
Bradley 2993 S.P..
X Ursae Majoris ....
Bradley 2993 S.P..
X Ursse Majoris....
Bradley 3147 S.P..
54. Leonis
Bradley I 3QQ.
20 Leonis Minoris.
X Ursse Min. S.P...
tf> Geminorum
X Ursse Min. S.P...
85 Geminorum
Groombridge 1119.
1 5 Cancri..
Bradley 3147 S.P..
Groom bridge 1 119.
Bradley 2701 S.P..
/> 2 Cancri
Groomb. 3548 S.P.
10 Leonis Minoris.
Bradley 2993 S.P.
22 Leonia Minoris..
Bradley 2993 S.P.
42 Leonis Minoris.
Bradley 2701 S.P..
11013 Lyncis
Piazzi IX. 37
a Lyncis
Bradley 1 399
20 Leonis Minoris..
ERROR IN AZIMUTH.
249
Transit C Values of n continued.
Date.
Names of Stars.
Position.
1
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
Date.
Names of Stars.
a
o
'3
&
Tabular
R.A.-
Observed
Transit.
Factors.
n
Apparent.
71
Adopted.
1902.
Mar. 28
April 7
April 8
Gr
Bradley 2993 8. P..
21 Leonis Minoris..
Bradley 2993 S.P..
5 1 Ursse Majoris . . .
Bradley 3147 S.P..
u Ursie Minoris
Bradley 3147 S.P..
67 Ursse Majoris...
Bradley 1672 ...
ienwi(
W
W
W
W
W
W
E
E
E
E
W
E
E
E
E
E
E
E
W
W
W
W
W
W
W
W
W
W
:7i continue
in B
o. 23-61
- o- 13-45
0.22-83
- o- i3"34
- o. 27-84
- 0- I3-39
o. 28-44
- o. 13-03
+ o. 13-20
- 0.13-56
aris.
o. 52-18
- 0-48-37
o. 46-90
0.48-28
- o- 53'53
o. 48-28
o. 51-20
- -4 8 '33
o. 57-08
o. 48-18
- o. 38-17
o. 48-11
- 0-43-59
o. 48-00
- 0-55-29
o. 48-06
- 0.55-24
- 0.47-96
d.
-13-04
+ 0-72
-13-04
+ 0-80
-1771
+ 0-67
-17-71
+ 0-95
+ 32-57
+ '5
- 6-380
+ 0-468
+ 6-907
+ o-495
-13-04
+ '54
-17-71
+ 0-47
-177'
+ 0-40
+ 32-58
+ 0-47
+ 10-89
+ 0-65
-13-04
+ 0-75
-17-70
+ 0-67
8
+ 0738
(+ 0-686)
+ 0786
+ 0-826
+ 0-834
+ 0-556
+ 0-215
+ 0-387
+ 0-158
+ 0-491
+ 0-310
+ 0-431
+ 0-524
+ 0-396
I
+ 0-762
+ 0-327
+ 0-336
1902.
April 8
April 9
April n
1
Bradley 31478.?..
67 Ursae Majoris...
Bradley 1399
^aris-
E
E
E -
E
E
E
E
E
W
W
E
W
E
E
E
E
W
W
W
W
W
W
E
E
E
E
E
E
E
E
continued.
m a
- o. 52-24
0.48-10
- 0.45-23
- 0.48-17
- o. 53-32
0.48-17
- 0.53-11
- 0.48-23
- o. 53-82
0.48-21
- c-54'4 1
o. 48-08
o. 39-01
o. 48*40
- o. 39-96
- 0.48-52
- 0.45-24
- 0.48-33
o. 42-90
- 0.48-45
- 0.55-91
- 0.48-17
- 0.55-13
o. 48-40
- 0.56-53
- 0.48-33
- o. 37-03
- 0.48-44
- o. 36-44
- 0.48-47
-17-70
+ 0-95
+ 10-89
+ 0-62
-13-04
+ 0-64
-13-04
+ o-44
-17-70
+ 0-67
-17-70
+ 0-91
+ 32-59
+ 0-50
+ 3*'59
+ 0-53
+ 6-906
+ 0-695
+ 10-89
+ 0-50
-13-04
+ 0-89
-13-04
+ 075
-17-70
+ 0-80
+ 32-59
+ 0-53
+ 32-59
+ 0-50
i
+ O-222
+ 0-286
+ 0-376
(+o- 3 6z)
+ 0-305
+ 0-340
+ 0-293
(+ 0-267)
+ 0-498
+ 0-535
+ 0-555
+0-488
+ o-443
+ o-35 6
(+0-375)
8
+0-315
+0-477
22 Leonis Minoris.
Bradley 2993 S.P..
37 Leonis Minoris.
Bradley 2993 S.P..
41 Leonis Minoris.
Bradley 31478.?..
v Ursse Majoris
Bradley 31478.?..
Piazzi IX. 146
Bradley 1672
12 CoilliB
Bradley 2701 S.P..
9 Leonis
I 3 COQ188 .
Piazzi IX. 37
Bradley 1672
i 3 Leonis
1 4. (Jomse
Bradley 2993 S.P..
44 Leonis
Piazzi IX 37
Bradley 3147 S.P..
54 T^eonis
a Lyncis
Bradley 3147 S.P..
92 Leonis
u, Leonis
Bradley 2993 S.P..
19 Leouis Minoris.
Bradley 2993 S.P..
35 Leonis Minoris.
Bradley 3147 S.P.
51 Ursa; Majoris...
Bradley 1672
Bradley 1672
2 I CotB<e
Bradley 1399
33 Leonis Minoris.
Bradley 2993 8. P..
35 Leonis Minoris.
Bradley 3147 S.P..
v UrssB Majoris
Piazzi XII. 3
Bradley 1672
4 Conise
250 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Transit C Values of n continual.
Date.
Names of Stars.
Position.
Tabular
K.A.
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
Date.
Names of Stars.
Position.
Tabular
R.A.-
Observed
Transit.
Factors.
n
.Apparent
n
Adopted.
1902.
April 1 1
April 13
April 14
April 17
I
Bradley 1672.
^aris-
W
W
W
E
E
E
E
E
E
E
W
W
W
W
W
W
W
W
E
W
E
E
E
E
W
W
W
W
W
W
continued.
m B
o. 32-20
0.48-62
- 0- 5I-53
- 0.49-27
- 0- 4-7-35
- 0.49-32
- - 47-45
- 0-49-47
- o. 51-99
0.49-28
- o. 54-47
o. 49-26
- 0.55-14
- 0.49-19
- 0-55-04
- 0.49-21
0.41-64
o. 49-26
- 0.43-28
- 0-49' 1 /
- 0.55-20
- 0.49-53
o. 56-12
- 0-49-34
o. 46-52
o. 49-26
- 0.55-07
- 0.49-45
o. 46-14
- o- 49' 8 5
+ 32-59
+ '47
- 1.6-99
+ o-47
+ 6-906
+ "495
+ 10-89
+ 0-72
-13-04
+ 0-87
-13-04
+ 0-80
-17-70
+ I'OO
-17-70
f 0-97
+ 32-59
+ 0-53
+ 32-59
+ 0-88
-47-18
+ 077
-47-18
+ 0-77
+ 6-906
+ o-433
-13-04
+ 0-50
+ 10-89
+ 0-62
s
+ 0-511
+ 0-129
+ 0-307
+ 0-199
+ 0-195
+ 0-376
+ 0-318
+ 0-312)
+ 0-2 3 8
+ 0-I86
+ 0-II8
+ 0-141)
+ 0-423
+ 0-415
+ 0-361
B
+ 0-233
+ 0-419
1902.
April 17
April 1 8
2
Bradley 2993 S.P.
22 Leonis Minoris
Bradley 3147 S.P.
59 Urseo Majoris..
Bradley 1672
4 Coma;
aris-
W
W
E
E
E
E
W
W
E
E
W
W
E
W
E
W
E
E
E
E
W
W
W
W
E
W
W
W
E
W
continued.
m s
- o- 55' 6 5
- 0.49-85
o. 56-38
- 0.49-69
- 0.40-37
o. 50-00
- o. 37-95
- 0.49-83
- 0.53-79
o. 49-68
I. 7-11
o. 49-66
- i- 275
- 0.49-74
i. 2-18
- 0.4974
o. 45-66
- o. 49-65
o. 56-31
o. 49-82
- o. 59-40
- 0.49-73
- 0.59-53
- 0.49-73
o. 56-98
0.49-61
- 0.34-17
0.49-88
- o. 37-45
- 0.49-85
-13-04
+ 0-62
-1770
+ 0-97
+ 32-60
+ 0-50
+ 32-60
+ 0-53
-13-40
+ 0-74
-47-16
+ 0-77
-47-16
+ 0-86
-47-16
+ 0-86
+ 10-89
+ 0-87
-13-04
+ 0-65
-17-70
+ 0-67
-17-70
+ 0-67
-17-70
+ 0-91
+ 32-60
+ 0-50
+ 32-60
+ 0-53
s
+0-425
+0-358
+0-300
+0-370
+0-291
+0-364
+0-271
(+ 0-259)
+0-398
+0-474
+0-526
+ 0-533)
+0-396
+0-489
+0-386
I
+ 0-343
i
+ 0-443
21 Comse
Groomb. 3548 S.P.
9 Leonis
Pia/zi IX. 37
Bradley 1672
Brailley 1399
14 Comas
21 Leonis Minoris.
Bradley 2993 S.P..
Piaz/.i IX. 254
Bradley 2993 S.P.
51 Ursa; Majoris...
Bradley 3147 S.P..
if/ Ursa; Majoris
Bradley 3147 S.P..
59 Ursa; Majoris...
Bradliy 1672
2 Ursae Minoris S.P
1 4 Canum Ven ....
Polaris S.P-
Groombridge 1986.
Polaris S.P
23 Canum Ven
Polaris S P
23 Canum Ven
Bradley 1 399
Piazzi XII. 3.
Bradley 1672
Piazzi IX. 254
Bradley 2993 S.P..
33 Leonis Minoris..
Bradley 3147 S.P..
v Ursae Majoris
Bradley 3147 S.P..
v Ursae Majoris
Bradley 3147 S.P..
Piazzi XL 146
Bradley 1672
4 Coniso
9 Canuni Ven
Polaris S.P.
Groombridge 1986.
Polaris S.P
17 Canum Ven
Piazzi IX. 37
X Leonis
Bradley 2993 S.P..
LL Leonis
Bradley 1399
22 Leonis Minoris.
Bradley 1672
14 Comae
ERROR IN AZIMUTH.
251
Transit C Values of n continued.
Date.
Names of Stars.
Position.
Tabular
R.A-
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
Date.
Names of Stars.
Position.
Tabular
R.A.-
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
1902.
April 1 8
April 19
April 20
April 2 1
/
2 Ursse MinorisS.P.
7 1 ConicG
'aris-
W
w
E
E
W
W
W
W
w
w
w
w
E
E
W
w
E
E
E
E
W
W
W
w
E
W
E
W
E
E
-continued.
in s
- o- 56-53
- 0.49-85
- I. 2'80
- 0.4978
- 0.43-51
- o- 4975
o. 59-16
- -49'53
o. 42-56
o. 49-66
- 0.5871
o. 49-86
- 0.58-38
- 0.49-87
I. 2'2I
- 0.4972
- o. 34-99
- o. 49'99
- 0-55-97
- 0.49-84
- 0.57-58
- 0.49-79
- I- 13-94
- o. 49-67
i. 10-64
- Q-4973
- ' "'45
- 0.4973
- 0.43-89
o. 49-90
-13-40
+ 0-40
-47-17
+ 0-86
+ 10-89
+ 0-72
-13-04
+ 0-87
+ 10-89
+ 0-62
-13-04
+ 0-65
-1770
+ 0-91
-1770
+ 0-80
+ 32-60
+ 0-53
-13-40
+ 0-81
-13-40
+ 074
-47-16
+ 0-98
-47-16
+ 0-86
-47-16
+ 0-86
+ 10-89
+ 0-62
1
+ 0-484
+ 0-271
+ 0-612
+ 0-692
+ 0-691
+ 0-646
+0-457
+0-675
+0-468
+0-431
+0-551
+0504
+0-435
(+o'45z)
+ 0-585
+ 0-652
+ 0-530;
1902.
April 21
April 23
I
Bradley 2993 S.P..
44 Leonis Miuoris..
Bradley 3 147
'aris-
E
E
E
E
W
W
w
w
w
w
w
w
E
E
W
E
W
W
W
W
W
W
E
E
W
W
E
E
E
E
-continued.
Da s
-0-57-95
-0.49-92
I. 0-26
-0.4978
I. 1-48
-0.49-99
o. 31-09
-0.49-83
- 0.31-29
- 0.49-89
- 0.57-58
o. 49-82
- I - II ' 6 5
- 0.49-76
1. 14-88
- 0.49-83
- 0.5972
o. 49-96
I. 2 'O6
0.49-81
- I. 2'3 8
- 0.49-84
o. 35-66
o. 50-21
o. 32-09
- 0.4974
- 0.33-85
o. 50-22
- o. 57-18
o. 50-00
-13-04
+ 0-54
-1770
+ 0-67
-17-70
+ 0-40
+ 32-60
+ o-50
+ 32-60
+ 0-53
-13-40
+ 0-8 1
-47 -I 5
+ 0-87
-47''5
+ 0-86
-13-04
+ 075
-17-70
+ 0-91
-17-70
+ 0-79
+ 32-61
+ 0-50
+ 32-61
+ 0-95
+ 32-61
+ 0-47
13-40
+ 0-8 1
8
+ 0-591
+ 0-571
+ 0-635
+ 0-584
(+0-580)
+ 0-546
+ 0-456
+ 0-522
+ 0-708
+ 0-658
(+0-678)
+ 0-453
+ 0-558
+ 0-509
+ 0-505
8
+ 0-562
+ 0-569
Polaris S P
23 Canum A^en
v Ursse Majoris
Bradley 3147 S.P..
Q 2 Leonis
Bradley I 3QQ
21 Leonis Minoris..
Bradley 2993 S.P..
Piazzi IX. 254
Bradley 1672
Bradley 1672
Bradley I 399
2UrseMin. S.P....
a Canum Ven
Polaris SP .. .
22 Leonis Minoris..
Bradley 2993 S.P..
33 Leonis Minoris.
Bradley 3147 S.P..
Piazzi XL 146
Bradley 3147 S.P..
5 1 Urssc Majoris....
Bradley 1672
14 ComtB
20 Canum Ven
Polaris S.P
23 Canum Ven ....
Bradley 2993 S.P..
3 5 Leonis Minoris.
Bradley 31478.?..
Piazzi XI. 146
Bradley 3147 S.P..
Groombridge 1830,
Bradley 1672 ..
2 Ursne Min. S.P....
2 Ursse Min. S.P...
14 Canuin Yen
Polaris S.P
Piazzi XIII. 71
Polaris SP ...
Bradley 1672
23 Canum Ven
Polaris S.P
67 Ursse Majoris....
Bradley 1672
20 Canum Ven
Bradley 1300...
21 Comse
2 Ursa; Min. S.P...
a Canum Ven
22 Leonis Minoris..
252 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Transit C Values of n continued.
E*
Tabular
c Tabular
Date.
Names of Stars.
R.A.
Observed
Factors.
n
Apparent.
n
Adopted.
Date.
Names of Stars.
.J R.A.-
; Observed
Factors.
n
Apparent.
n
Adopted.
1
Transit.
(2 Transit.
Paris continued.
Greenwich continued.
1902.
m s
s
a
1902.
111 8
s
B
April 23
Polaris S.P.
E
I. I4'6c
4.7*14
+ O-C-I C
April 27
2 Ursse Min. S.P...
E
O. 3VC 3
IV4-O
+ 1-118
23 Canum Ven
E
T 3
- Q-49'93
T/ T
+ 0-86
i J j
14 Canum Ven....
E
J J J J
- o. 17-72
J T
+ 074
PolarisS.P E
I. 12-02
-47-I3
+ '133
April 24
Bradley 3147 S.P..
E
i. 1-61
-17-70
+ 0-630
23 Canum Ven
E
o. 17-62
+ 0-87
v Ursae Majoris
E
o. 50-03
+ 0-67
Polaris S.P
W
I. 20-70
-47-I3
+ I-3I3
Bradley 3 1478. P..
E
I. I'2O
-17-70
(+ 0-602)
23 Canum Ven
E
- o. 17-68
+ 0-86
59 Ursse Majoris...
E
- - 49"95
+ 0-97
Bradley 1672
E
O. 3 I '6?
+ -12-61
+ O'c82
April 28
Bradlev i IQQ ..
E
o. 6*23
+ 10-80
+ 1*14.8
f Virginia
E
** j * * /
- o- 5'57
1 J
+ 0-15
-j- w } w*.
33 Leonis Minoris.
W
- - J 7'99
I 7
+ 0-65
1 * l T
Bradley 1672
W
O 3O*73
+ !2*6l
-4-O"6o7
-4-o'6oc
Bradley 2993 S.P..
E
o 33-08
I VOJ.
+ 1-16-;
14 Comse
W
J I J
o. 50-21
1 J
+ 0-53
1 * v^/
i "* v*^ ^
35 Leonis Minoris.
W
J J 7
- o. 17-92
1 J T
+ 0-75
l^ * * w j
2 Ursse Min. S.P...
W
o. 58-68
-13-40
+0-614
Bradley 2993 S.P..
W
- o. 37-15
-13-04
+ '394
14 Canum Ven
W
o. 50-00
+ 0*74
35 Leonis Minoris.
W
o. 17-92
+ 0-75
Polaris S.P.
W
W
- 1. 18-97
- 0.49-89
-47-14
+ 0-98
+ 0-604
Bradley 3147 S.P..
59 Ursse Majoris...
E
E
- 0.40-47
o. 17-66
-17-70
+ 0-97
+ 1*222
PiazziXm. 71
+ 1-316
Polaris S.P
E
i 18*3.3
Ll'lL
4-O'CQI
Bradley 1672.
E
+ o. 22*46
+ 32'6l
+ I-266
B. F. iqoc
E
* * j j
O. CO'O7
T/ T
+ O'7O
-p^ jyl
4 Comae . . .
E
O. I 8*2O
J J *
4- O"?0
**. J^ w /
v / w
2 Ursae Min. S.P...
E
- 0-357I
-|- w -jw
-13-40
+ 1*263
Greenwich.
9 Canum Ven
E
- o. 17-67
+ 0-88
PolarisS.P
E
i. I6-C-;
4.7-13
+ K226
April 27
Bradley 1300 ..
W
- o. 5-29
+ 10*89
+ 1-226
Groombridge 1986.
E
j j
- o. 17-91
T/ -*
+ 0-77
8 Leonis
E
o. 18-16
+ 0-39
Polaris S.P.
W
i. 26-78
J.7'13
4- l -4.4.0
Bradley 2993 S.P..
W
- - 35 - >4
-13-04
+ 1-257
25 Canum Ven
W
- o. 17-84
T/ J
+ 075
-p i tt^>
5 i Ursae Majoris...
E
- o. 17-75
+ 0-80
Bradley 2993 S.P..
E
o. 32-02
-13-04
+ 1-031
May i
Bradley 2993 S.P..
W
- 0.37-29
-I3-04
+ I-376
51 Ursae Majoris...
E
- o- '775
+ 0-80
37 Leonis Minoris.
W
o. 18-32
+ 075
Bradley 3147 S.P..
E
- o. 38-49
-17-70
+ 1-128
Bradley 3147 S.P..
W
- 0-43-44
-I7-70
+ I-368
Piazzi XI. 146
E
- o. 17-50
+ 0-91
\l> Ursse Majoris ....
W
o. 17-86
+ TOO
Bradley 1672...., .
W
+ o. 2476
+ 32-61
+ 1-334
+ 1-199
Bradley 31478.?..
E
- o. 38-88
-17-70
+ PIII
12 Comae
W
o. 18*09
+ 0-50
v Ursse Majoris
W
o. 18-48
+ 0-6 7
2 Ursae Min. S.P. .
W
o. 36-67
-13-40
+ i'34i
Bradley 3147 S.P.
W
- 0.42-25
-1770
+ 1-304
31 Comae
W
- o. 17-99
+ 0-53
92 Leonis
W
o. 18-65
+ 0-40
ERROR IN AZIMUTH.
253
Transit C Values of n continued.
Date.
Names of Stars.
Position.
Tabular
RA.-
Observed
Transit.
Factors.
n
A pparen t.
n
Adopted.
Date.
Names of Stars.
1
1
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
1902.
May i
May 2
May 3
Gre
Bradley 1672
enwii
E
E
E
E
E
E
E
E
W
w
E
E
W
W
W
w
E
E
W
W
w
w
w
w
E
E
W
W
E
E
li continuei
m s
+ o. 18-83
- o. 18-68
- 0.35-01
o. 18-15
- o. 34-48
o. 18-17
- 1.13-83
o. 18-15
- I.Z3-53
c. 18-19
+ o. 17-32
o. 18-70
- 0.37-16
o. 18-29
- 1-23-43
O. l8'22
- 1. 12-47
o. 18-39
- o- 37 '4
o. 18-52
0. 37'22
o. 18-90
r. 23-86
o. 18-43
I. 14-80
o. 1831
+ o. 11-51
o. 18-89
+ o. 9-10
o. 18-79
1.
+ 32-62
+ '5
-13-40
+ 0-88
-13-40
+ 0-86
-47-12
+ o-87
-47-12
+ 0-81
+ 32-62
+ 0-50
-13-40
+ 0-86
-47-11
+ 0-86
-47-11
+ 0-75
-13-40
+ 0-8 1
-13-40
+ 0-54
-47-11
+ 0-86
-47-11
+ 077
+ 23-96
+ 0-50
+ 23-96
+ 0-58
s
+ 1-168
+ 1-181
(+''44)
+ 1-160
+ i-3 6 3
+ I-I2I
+ I-323
+ 1-359
+ I-I30
+ I-329
(+ ''3'4)
+ 1-364
+ i'i8o
+ 1-296
+ I-I93
B
+ 1-254
+ 1-234
+ 1-259
1902.
Sept. 21
Sept. 22
X Ursse Minoris ....
24 Vulpcculse
W
E
W
E
E
E
E
E
W
W
W
w
E
E
E
W
W
w
w
w
E
E
E
E
E
E
E
E
E
E
Paris
m B
+ 0. I 2'I 6
o. 1-26
o. 13-86
O. I"26
o. 16-58
o. 1-26
+ o. 0-48
o. 1-27
+ o. 2-27
o. 1-07
+ o. 5' 6 9
- o. 1-07
+ o. 2-66
o. 0-92
+ o. 7-06
- o. 1-08
+ o. 8-42
o. i -08
o. 12-91
o. i -08
- o. 9-59
o. i -i 6
o. 0-09
0. I'22
- o. 2-35
o. 1-14
o. 3-62
O. I'22
+ o. 1-48
O. 1-22
+ 57-30
+ 0-45
-52-99
+ 0-45
-52-99
+ 0'45
+ 6-387
+ 0-624
+ 13-06
+ 0-82
+ 1773
+ 0-53
+ 1773
+ 1-03
+ 57-30
+ 0-92
+ 57-3
+ 0-92
-52-99
+ 075
-52-99
+ '45
+ 6-393
+ 0-586
- 6-899
+ 0-784
-10-87
+ 076
+ 13-06
+ 0-76
8
+ 0-236
+ 0-236
+ 0-287
+ 0-304
+ 0-273
+ 0-393
+ 0-214
+ 0-145
+ 0-169
+ O'22O
+ 0-158
+ 0-195
+ 0-157
+ 0-206
+ 0-22O
a
+ 0-277
+ 0-204
1 2 Corns
2 Ursa? Minoris S.P.
9 Canum Ven
Groomb. 1119 S.P.
24 Vulpeculae
2 TTrsae Minoris S.P.
Piazzi XIII. 27
Polaris S.P
Groomb. 1119 S.P.
24 Vulpeculse
Bradley 2701 .
20 Canum Ven
Polaris S.P
A a Cveni ..
Bradley 2993
Groombridge 2043
Bradk-y 1672
Groombridge 3804.
Bradley 3 1 47
1 3 Comse ....
Bradley 314.7 ..
2 Ursa; Minoris S.P.
Piazzi XIII. 27 ....
Polaris S.P
\f/ Andromedae
A Ursse Minoris ...
23 Canum Ven. ...
Polaris SP
X Ursse Minoris ....
25 Canum Ven. ...
2 UrsaeMinorisS.P.
a Canum Ven
z UrsaeMinorisS.P.
/? Corase
Groomb. 1119 S.P.
2C Cvcrni...
Groomb. 1 1 19 S.P.
24 Vulpeculse
Bradley 2701
Polaris S P
23 Canum Ven. ...
Polaris S.P
C2 Cvffni
Piazzi IX. 37 S.P..
72 Cveni...
4536 B. A. C
Groombridge 2283.
b Bobtis
Bradley 1399 S.P..
Piazzi XXII [.65..
Bradley 2003...
Groombridge 2283.
o Corome
Piazzi XXIII. 65 ..
GREENWICH OBSERVATIONS, 1902.
2 k
254 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Transit C Values of n continued.
Date.
Names of Stars.
Position.
Tabular
R.A.-
Observed
Transit.
Factors.
n
Apparent
n
Adopted.
Date.
Names of Stars.
Position.
Tabular
K.A.
Observed
Transit.
Factors.
n
Apparent
n
Adopted.
1902.
Sept. 22
Sept. 24
Sept. 26
1
Bradley 2001.
D am-
E
E
W
w
E
W
\V
\v
W
W
E
E
E
E
W
W
W
W
E
W
E
E
W
W
W
W
E
W
W
E
continued.
m s
+ 0. I"22
0. I '2 2
+ o. 376
o. 1-17
+ O. 2'12
o. 1-17
- o- 3H6
o. 0-98
+ o. 5-28
0. 1 '00
+ o. 4'i6
o. i 'i 3
- o. 15-56
O.I 'DO
+ o- 473
o. 0-76
+ o. 19-39
o. 0-99
+ o. 15-56
o. o'99
+ . 4"92
o. 0-65
+ . 5-69
o. 0-80
+ o- 7-02
o. 0-83
+ o. 6-41
o. 0-83
- o. 8-62
o. o 76
+ 13-06
+ 0-76
+ '774
+ 0-43
+ 1774
+ '43
- 4-8^5
+ 0-426
+ '774
+ 0-62
+ 1774
+ Q'46
-32-52
+ 0-56
+ 13-41
+ 078
+ 47-22
+ 0-50
+ 47-22
+ 0-50
+ 13-07
+ 0-89
+ 13-07
+ '43
+ '774
+ '43
+ 1774
+ o'43
-32-52
+ 0-65
8
(+0-198)
+ 0-285
+ 0*190
+ 0-472
+ 0-367
+ 0-306
+ 0-440
+ 0-435
+ 0-436
+ o-354
+ o-457
+ 0-513
+ o-454
+ 0-419
+ 0-539
8
+ 0-398
+ 0-468
1902.
Sept. 26
Sept. 29
v
Oct. 2
1
Bradley 1672 S.P..
TT Andromedse
3 am-
E
E
E
E
E
E
E
E
W
W
Gr
E
E
W
E
W
E
E
E
W
W
W
"W
E
E
E
E
E
E
continued.
m s
o. 15-96
o. 0-76
+ o. 4-68
o. 0-84
+ o. 19-22
o. 0-84
+ o. 18-03
o. 0*84
+ 0. 22-20
- o. 077
eemcich.
o. 8'6o
+ o. 5-32
- o. 9-53
+ o. 5-30
o. 9-86
+ o. 5-31
+ o. 2-27
+ o. 5-32
+ o. 6-78
+ o. 5-40
+ o. 2-86
+ o. 5-49
+ O. I 62
+ o. 5-35
+ o. 472
+ o. 5-24
+ o. 4-47
+ o. 5-24
-32-52
+ 0-65
+ I3 + I
+ 0-57
+ 47-23
+ 0-57
+ 47-23
+ 0-57
+ 47-23
+ 0-96
+ 57-3I
+ 0-39
+ 57'3'
+ 0-47
+ 57-3I
+ 079
+ 17-04
+ 0-78
-10-87
+ 0-76
+ 13-07
+ 0-46
+ 13-07
+ 0-43
+ 6-40
+ 0-70
+ 6-39
+ 0-70
a
+ 0-458
+ 0-430
(+ '43)
+ 0-404
+ 0-496
-0-245
0-261
(-0-268)
-0-188
o-i 19
0-209
-o-295
0-091
-0-135
8
O'220
Piazzi XXIII. 65 ..
Bradley 3 14.7.
2 Ursfe Minoris....
T Pegasi
Bradley 3147
Polaris .
T Pegasi
Bradley i 508 S.P..
X Pegasi
Polaris
T Piscium
Polaris
Bradley 3147
67 Peeasi ..
X Ursse Minoris ...
Lalande 39329
X Ursae Minoris ....
Berlin 3.7685
X Ursse Minoris....
Bradley 3 147...
\1/ Peirusi . . ,
Bradley 1672 S.P..
28 AndromedcB
2 UrsB Minoris ....
p. Andromedae . ..
Polaris
v Piscium
Polaris . . .
Groombridge 3548.
v Piscium
Bradley 2993
Bradley 1399 ^^ ><
Groombridge 3750.
Bradley 2993
Bradley 2003 .,
X Peeasi ..
Bradley 2993
X Pecisi
Bradley 3147
T Pegasi .
Bradley 2701
Bradley 3147
r Pegasi
Bradley 1672 S.P.
TT Andromedse
4/ wo 111
75 Draconis
47 Cvni
<
ERROR IN AZIMUTH.
255
Transit D Values of n continued.
Date.
Names of Stars.
Position.
Tabular
R.A.
Ovserved
Transit.
Factors.
n
Apparent.
n
Adopted.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
1902.
Oct. 2
Oct. 8
Grei
Groombridge 3548.
Lund 10053 .
nwicl
E
E
W
W
W
W
W
W
E
E
W
E
E
E
E
E
E
E
W
\v
W
W
W
W
E
E
E
E
W
W
i continue'^
in s
+ o. 3-80
+ o- 5'3'
+ o. 2-40
+ o- 5-25
+ 0- 5'37
+ o- 5-3i
+ o. 3-60
+ o. 5-31
+ 0- 273
+ o. 5-29
+ . 4-63
+ o. 4-42
+ o. 5-23
+ o. 4-42
+ o. 4-60
+ o. 4'35
+ o. 4-24
+ o- 4-35
+ o. 3-18
+ o. 4-46
+ o. 2-42
+ o. 4-40
+ o. 474
+ . 4-4
+ o. 4'44
+ o. 4-31
+ o. 4-66
+ - 4-34
+ o. 4-87
+ o. 4-43
4-17-04
+ 078
+ 17-04
+ 0-78
-10-87
+ 0-46
+ 13-07
+ '4 6
+ i3"07
+ 0-81
-52-96
+ 75
-52-96
+ 0-75
+ 6-394
+ 0-525
+ 6-384
+ 0-525
- 6-974
+ 0-856
10-86
+ 0-64
+ 13-07
+ 0-64
+ 13-07
+ 0-43
+ I7-75
+ 0-43
+ 1775
+ 0-46
8
-0-093
-0-175
0-005
0-136
0-209
0-004
0-015
+ 0-042
0-019
+ 0-163
+ 0-172
+ 0-027
+ 0-010
+ 0-019
+0-025
8
0-119
+ 0-043
1902.
Oct. 8
Oct. 9
Oct. 10
Gn
Bradley 1672 S.P..
Piazzi 1 3
'.enioii
W
W
W
W
W
W
W
W
W
W
E
E
E
E
E
E
W
W
W
W
E
E
E
E
E
E
E
E
W
W
h continue
m s
+ o. 1-37
+ o. 4-26
+ o. 0-54
+ o. 4-29
+ o. 3-85
+ o. 4-49
+ o. 3-83
+ o. 4-51
+ o. 4-2 1
+ - 4-39
+ o. 3-60
+ 0- 4'54
+ o. 5-04
+ o. 4-45
+ o. 477
+ o. 4-54
+ o. 4-56
+ o. 4-50
+ o. 3-39
+ o. 4-50
+ o. 6-38
+ o. 4-38
+ o. 2-54
+ o. 4-49
+ o. 6-05
+ . 4^9
+ o. 6-40
+ o. 4-40
+ o. 5-70
+ o. 4-46
d.
-32-49
+ 0-85
+ 32-49
+ 0-85
+ 7-280
+ 0-730
10-86
+ 0-64
+ 13-07
+ 0-76
+ 13-07
+ 0-93
+ I7-75
+ 0-62
+ I7-75
+ 0-72
+ 7-280
+ 0730
+ 17-04
+ 0-8 1
+ 17-04
+ 0-47
10-86
+ 0-76
+ 13-07
+ 0-82
+ 1770
+ 0-62
+ 17-70
+ 0-46
a
+ 0-087
(+0-113)
0-098
+ 0-059
-0-OI5
-0-077
+ 0-034
+ O-OI4
+ 0-009
0-068
+ O-I21
+ 0-168
+ 0-II9
+ 0-II7
+ 0-072
8
O-OI4
+ 0-092
Groombridge 3548
72 Cvffni ..
Bradley 1672 S.P.
23 Andromedre
76 T)racon : s .
Bradley 1399 S.P..
t Pesasi...
Bradlev 2003
C 4. CvETlli. . .
Bradley 1399 S.P..
TT Pegasi
i Pe (r asi ..
Bradley 2993
Groomb. 1119 S.P.
16 Cveni..,
i Lacertse
Bradley 2993
1 5 Lacertse
Bradley 3 1 47 . . .
Groomb. 1119 S.P.
36 Cvsni...
6? Ptjcasi .
Bradley 3147
Bradley 2701
W.B.(a) XXIII. 907
32 VulpeculaB
3 2 VulpeculeB
HCvcui ..
Piazzi IX. 37 S.P.
Bradley 2841
Groombridge 3548.
Bradley 1399 S.P.
TTj Pegasi
Groombridge 3548.
Bradlev 2993 .. ..
Bradley 1399 S.P..
i Lacertre .
;r 2 Pegasi
Bradley 2993
\ Pegasi
Bradley 2993
Groombridge 3804.
Bradley 3 1 47
Bradley 314"
T Pegasi
Bradley 3147
\lf Pegasi. . .
Bradley 3147
256 TELEGRAPHIC DETERMINATION OF 'LONGITUDE, PARIS -GREENWICH, MADE IN 1902.
Transit Values of n continued.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
Date.
Names of Stars.
Position.
Tabular
R.A.-
Obsevved
Transit.
Factors.
71
Apparent.
n
Adopted.
1902.
Oct. 10
Oct. 12
Oct. 14
&n
Bradley 1672 S.P..
23 Andromedee
Bradley 1672 S.P..
Piazzi 0. 13
tenwi
W
W
E
W
E
W
E
E
E
E
W
W
W
W
W
W
W
W
E
E
E
E
E
E
W
E
E
E
W
W
*Jh continue
m s
O. I "2 I
+ o. 4-32
O. POI
+ o. 4-42
o. 0-38
+ o. 4-42
+ o. 4'99
+ o. 4-55
+ o. 8-42
+ o- 4"5-3
+ o. 772
+ o- 473
+ o. 5'55
+ o- 475
+ o- 5-55
+ o. 475
+ - 7"43
+ o. 4-52
+ o. 3-40
+ o. 4-66
+ o. 1-68
+ o. 4-56
+ o. 6-44
+ - 4'57
+ o. 674
+ o- 4-53
+ o. 7-36
+ o. 4-64
+ o. 6-92
+ o- 4' 6 3
d.
-32-49
+ 0-85
-32-49
+ 0-85
-3 2- 49
+ 0-85
+6-384
+ 0-586
+ 17-04
+ 0-57
+ 17-04
+ 0-84
+ 6-393
+ 0-730
+ 6-384
+ 0730
+ 17-04
+ 078
- 6-897
+ 0-839
-10-87
+ 0-64
+ 13-07
+ 076
+ 13-07
+ 0-52
+ 775
+ 0-62
4-1775
+ "55
s
+0-166
+ 0-163
(+0-144)
+0-076
+0-236
+ 0-185
+0-141
+0-141
+0-179
+0-163
+0-250
+ 0-152
+0-176
+0-159
+ 0-133
i
+ 0-171
+0-168
1902.
Oct. 1 5
Oct. 1 6
Gn
Bradley 1399 S.P..
7T Pegasi
wnwic
E
E
E
E
W
VV
W
W
E
W
W
W
E
W
E
E
W
W
W
\v
W
W
E
W
W
W
E
E
E
E
h continue
m s
+ o. 3-54
+ o. 4-62
+ o. 5-28
+ o. 4-58
+ O. 6'02
+ o. 4-56
+ o. 6 59
+ o. 4-65
+ o. 5-22
+ o. 4-65
o. 0-68
+ o. 4-61
+ o. 3-01
+ o. 4-62
+ o. 7-20
+ o- 4'59
+ o. 3-23
+ o- 4'54
+ o. 1-96
+ o. 4-64
+ o. 6-57
+ o. 4-63
+ o. 5-98
+ o. 4-58
+ o. 6-8 i
+ o. 4-58
+ o. 6-02
+ o. 4-56
+ o. 0-66
+ o. 4-61
d.
10-86
+ 0-64
+ 13-07
+ 0-64
+ 13-07
+ 0-82
+ '775
+ 0-62
+ 1775
+ 0-62
-32-48
+ 0-85
-32-48
+ o-54
+ 17-04
+ o-57
- 6-897
+ 0-469
10-86
+ 0-97
+ 13-07
+ 0-46
+ 13-07
+ 0-52
+ 17-70
+ 0-91
+ 1770
+ o-55
32-60
+ 0-54
a
+ 0-094
+ 0-056
+ 0-II9
+ 0-II3
+ 0-033
+ 0-159
+ 0-049
+ 0-158
+ 0-178
+ 0-227
+ 0-154
+ 0'1 12
+ 0-133
+ 0-085
+ 0-II9
+ 0-094
+ 0-146
Bradley 2993
7T> Pegasi
Bradley 1672 S.P..
Piazzi 13
Bradlev 2003 ..
Groombridge 3804
Bradley 3147
75 Draconis
67 Pegasi
52 Cvtrni...
Bradley 3147
Groombridge 3548.
Cv tr ni..
67 Peaasi...
Bradley 1672 S.P..
23 Andromedse
Bradley 1672 S.P..
a Andromedse
Groombridge 3548.
74 Cyeni...
Bradley 2701
Groombridge 3548.
C4. Cvcni...
75 Draconis
54 Cysni
Groombridge 3548.
Lund 10053
Piazzi IX. 37 S.P..
Piazzi IX. 37 S.P..
74 Cyeni...
Bradley 1399 S.P..
Groombridge 3655.
Bradley 2993
Bradley 13998.?..
IT, Pef'asi
Bradley 2003...
Bradley 2993
i Lacertae
Bradley 2003 ..
Bradley 3147
1 3 Androm edse
Bradley 3147
78 Pp^asi
p Pegasi
Bradlev 3147
67 Pegasi
Bradley 3 14.7...
Bradley 1672 S.P..
a Andromedae
78 Pegasi
ERROR IN AZIMUTH.
257
Transit C Values of n continued.
Date.
Names of Stars.
C
O
1
PI
Tabular
R.A.-
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent.
71
Adopted.
1902.
Oct. 16
Oct. 17
Oct. 1 8
Or
Bradley 16728.?..
ir Andromeda*
iemci
W
w
W
w
w
w
w
w
w
w
w
w
E
E
E
E
W
W
w
w
E
E
E
E
W
W
W
w
E
E
:7i continue
in s
- o- i'35
+ o. 4-68
o. 1-90
+ o. 4-72
+ o. 676
+ o. 4-66
+ o. 6-51
+ o. 4-66
+ o- 3*96
+ o. 4-65
+ o. 472
+ o. 4-65
+ o. 4-21
+ o. 4-60
+ o. 4-49
+ o. 4-58
+ o. 4-55
+ - 474
+ o. 1-31
+ o. 4-66
+ o. 4-67.
+ o. 4-61
+ o. 4-16
+ o. 4-61
+ o. 4" 6 7
+ o. 4-71
+ o. 6-29
+ o. 4' 6 7
+ o. 3-85
+ o. 4-57
d.
32-60
+ 0-65
32-60
+ 0'59
+ '3'4'
+ 075
+ I3'4'
+ o-95
10-86
+ o' 4 6
+ 13-07
+ 0-46
+ 13-07
+ 0-63
+ 1775
+ 0-62
+ 1775
+ 0-96
+ 47'3
+ o"55
-10-86
+ 0-76
+ 13-07
+ 0-76
+ 13-07
+ '45
+ 1775
+ 0-43
+ 1775
+ o-55
a
+ 0-181
(+0-199)
+ 0-166
(+ ''49)
+ 0-061
+ o'oo6
0-031
0-005
O'OII
0-072
0-005
-0-037
0-003
+0-094
0-042
O'OI I
+ 0-023
1902.
Oct. 1 8
Oct 2:
Gn
Bradley 1672 S.P.
a Andromedse
lenwii
I
E
W
W
E
E
E
E
E
E
E
E
E
E
W
W
W
W
E
W
W
W
E
E
E
E
E
E
E
E
h continue
in a
+ o. 4-10
+ o. 4-57
+ o. 1-42
+ o. 4-70
+ o. 5-95
+ o. 478
+ o. 4-65
+ o. 4-68
+ o. 3-19
+ o. 4-66
+ o. 4-02
+ o. 4-83
+ o. 4-83
+ o. 4'55
+ - 5'95
+ o. 4-67
+ o. 6-99
+ o. 4-52
+ o. 5-41
+ o. 4-49
o. 0-69
+ o. 4-65
+ o. 1-65
+ . 4'43
+ o. 6-03
+ o. 4-66
+ o. 7-25
+ o. 4-63
+ o- 7-I5
+ o. 4-63
d.
-32-47
+ '54
-32-47
+ 0-56
+ 17-05
+ 0-84
- 6-894
+ 0-927
10-86
+ 0-64
10-86
+ 0-97
+ 13-07
+ 0-46
+ i3'07
+ 0-82
+ 1775
+ 0-62
+ '775
+ 0-65
-32-47
+ 0-85
-32-47
+ 0-96
+ 13-42
+ 0-75
+47'33
+ 0-45
+ 47-33
+ -45
s
+ 0-014
+ 0-099
+ 0-072
+ 0-004
(+0-128)
+ 0'o68
+ O'O22
+ 0-104
+ 0-144
+ 0-054
+ 0-160
+0-083
+0-108
(+ o'S 6 )
+ 0-054
+ 0-091
Bradley 1672 S.P..
8 Andromedae
Bradley 1672 S.P..
28 Andromedae ....
Groombridge 3548.
74 Cv^ni
2 Ursse Minoris....
W.B. (2)0. 1172...
2 Ursse Minoris ...
41 Andromedae
Bradley 1399 S.P..
i Pegasi
Piazzi IX. 37 S.P..
7: Cveni. ..
Bradley 1399 S.P..
Leiden 9262
Bradley 2003...
Bradley i 399 S.P..
Groombridge 3655.
Bradley 2993
i Pegasi
Brad lev 2003 ..
38 Pegasi
Bradley 3147 .
i Pegasi
Bradley 2993
67 Pegasi
Bradley 714.7 ..
Groombridge 3804.
Bradley 3 1 47
K Andromedee
Polaris
67 Pegasi ...*
78 Pegasi
Bradley 1399 S.P..
i Lacertse
Lalande 47034
Bradley 1672 S.P..
Bonn 134
Bradley 2993
Bradley 1672 S.P.
Piazzi 74.
i LiK-ertae
Bradley 2003...
2 TJrsae Minoris...
W.B. (2)0. 1172...
Polaris
J W>
u. Pesasi
Bradley 3147
T Pegasi
Bradley 3147
Polaris
78 Pegasi
<j> Piscium
258 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902,
Transit C Values of n continued.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
1902.
Oct. 21
Oct. 22
Oct. 2 5
Gr
Polaris
eemoi
W
E
W
W
E
E
E
E
E
W
W
W
w
E
W
W
E
E
E
E
E
W
W
W
W
W
W
ch continue
m s
+ o. 8-46
+ o. 4-64
+ o. 3-87
+ o. 478
+ o. 5-19
+ . 4-54
+ o. 3-80
+ o- 4'54
+ o. 3'i9
+ o. 4-56
+ o. 5-63
+ o- 4-83
+ o. 2-15
+ o. 4-81
+ o- 7'43
+ o. 4-81
+ o. 8-8 i
+ o. 4-73
+ o. 273
+ o- 473
+ o. 2-35
+ 0- 473
Pan's.
+ o. 4-66
+ o. 1-03
- - 377
+ o. 0-97
- o. 3-15
+ o. 1-34
d.
+ 47'33
+ 0-50
- 6-897
f 0-776
10-86
+ 076
+ 13-07
+ 0-76
+ '775
+ o-43
+ 1775
+ 0-72
-3*'4 6
+ o'54
-32-46
+ '54
+ 47'33
+ 0-56
+47-33
+ 0-56
+ 47-33
+ 0-56
10-86
+ 0-82
+ 13-07
+ 0-81
+ '775
+ '45
s
+ 0-082
+ 0-119
0-056
0-060
-0-079
+0-047
+ 0-081
-0-079
+ 0-087
-0-043
( 0-051)
0-311
-0-387
o-z6o
g
+ 0-OI I
1902.
Oct. 25
Oct. 27
Oct. 28
1
3 aris-
E
E
1
E
E
E
W
w
E
W
E
E
W
E
E
W
W
W
w
W
W
w
w
w
w
w
E
E
W
E
continued.
m s
o. O'z6
+ o. 1-34
+ o. 672
+ o. i -06
- o. 0-57
+ 0. I'2S
o. 4-26
+ o. 1-33
o. 8-14
+ o. 1-33
+ o. 5-80
+ - 0-63
+ o. S+S
+ o. 0-63
- o- 775
+ o. 0-86
o. 7-62
+ o. 078
- o. 7-27
+ o. 078
+ o- H75
+ o. 0-69
+ o. 6-32
+ o. 072
+ o. 5-87
+ o. 071
o. 9-96
+ o. 0-60
- o. 11-94
+ o. 0-63
+ 1775
+ 0-jO
-32-46
+ 0-96
+ 13-42
+ 7 8
+ 47-34
+ 076
+ 47-34
+ 7 6
+ '775
+ 0'43
+ 1775
+ 0-43
-32-46
+ 0-65
-32-46
+ 0-53
-32-46
+ '53
+ 47-35
+ o-57
+ 1775
+ 0-91
+ I7-75
+ 0-55
-3^45
+ 0-85
-3^45
+ 0-65
-0-093
+ 0-169
-0-144
O'I20
O-2OJ
+ 0-299
+ 0-280
+ 0*260
+ 0-255
(+ 0-244)
+ 0-30I
+ 0-333
(+ 0-300)
+ 0-317
+ 0-380
a
0'2I I
+ 0-280
+ 0-332
v Piscium
gc Peorasi
Piazzi IX. 37 S.P..
Lund 10053. .
Bradley 1672 S.P..
Piazzi 0. 74
2 TJrsse Minoris....
u. AndroiuedcG
Bradley 1399 S.P..
I Lacertse
Polaris
Bradley 2993 S.P.
i Lacertse
47 Andromedae
Polaris
Bradley 3 14.7.
47 Andromedse
Bradley 3147
T Pegasi
Bradley 3147
W.B.(2)XXIII. 9 o7
Bradley 1672 S.P..
a Andromedse
T Pesasi . .
liradlBV 3 1 4.7
T Pegasi . .
Bradley 1672 S.P..
a Andromedse
Bradley 1672 S.P..
Polaris
Bradley 1672 S.P..
a Trianguli
Polaris
Bradley 1672 S.P..
a Trianguli
Polaris
a Trianguli
Bradley 1399 S.P..
Groombridge 3804.
Bradley 200'?..,
Bradley 3147
13 Andromedaa
Bradley 3147...
78 Pegasi .
Bradley 1672 S.P..
23 Andromedae
Bradley 1672 S.P..
18 Lacertse
Bradley 3147
/* Pegasi
ERROR IN AZIMUTH.
259
Transit C Values of n continued.
Date.
Names of Stars.
Position.
Tubular
K.A.-
Observed
Transit.
Factors.
n
Apparent
n
Adopted.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
1902.
Oct. 28
Oct. 29
(lot. 31
1
2 Ursse Minoris
W.K (2) 0. 1172...
Bradley 1399 S. P.
PiazziXXII. 65 ...
Bradley 2993
"aris-
E
E
W
W
W
W
E
E
W
E
E
E
W
E
E
E
W
W
W
W
E
E
E
E
E
E
W
W
E
W
continued.
m s
+ o. 4-52
+ o. 078
- o- 5'23
+ o. 079
+ o. 6-51
+ o. 097
+ o. 7-19
+ o. 0-72
+ . 8'53
+ o. 0-84
o. 15*90
+ o. o'8o
- o. 16-33
+ o. 0-80
+ o- 5-85
+ o. 0-85
+ o. 6-98
+ o. 0-87
+ o. 25-1 1
+ o. 0-80
+ o. 21-31
+ o. 0-85
- o. 3-83
+ o. 0-51
+ o. 4-05
+ o. 0-60
+ o. 8-44
+ o. 0-58
+ o. 6-27
+ o. 0-60
+ 13-42
+ 75
10-86
+ 0-76
+ 13-07
+ 0-82
+ 1776
+ Q'9 1
+ 17-76
+ 0-92
-32+5
+ 0-85
-3*'4S
+ 0-85
+ 13-42
+ 078
+ i3 - 42
+ 0-70
+ 47'3 6
+ 0-76
+ 47-36
+ 0-56
10-86
+ 0-64
+ 13-07
+ 0-82
+ '775
+ 0-62
+ 1775
+ -55
+ 0-295
+ 0-518
+ 0-452
+ 0-384
+ 0-457
+ 0-502
+'5'5
+0-396
+ 0-480
+ 0-522
+ '437
+ o-377
+ 0-281
+ '459
+ 0-330
a
+ 0-461
1902.
Oct. 31
Nov. 2
Nov. 3
Bradley 16728.?..
Piazzi 0. 13
Pa>
W
W
E
W
W
W
E
E
E
E
W
E
W
E
W
W
E
E
E
E
W
E
E
W
W
W
E
E
E
E
is continue
m a
- o- 'S'S'
+ o. 0-64
o. 1 1-24
+ o. 0-73
+ o. 6-62
+ o. 0-68
+ o. 5-54
+ o. 0-65
+ o. 18-32
+ o. 0-53
+ o. 21-23
+ o. 0-53
+ 0. 2 I -49
+ o. 0-53
- o. 12-44
+ o. 0*24
o. 10-50
+ o. 0-14
+ o. 4-45
+ o. 0-28
+ o. 5-15
+ o. 0-28
+ o. 13-45
+ o. 0-47
+ o. 16-88
+ o. 0-48
- o. 3-23
+ 0. O-2O
+ o. 3-94-
+ o. 0-34
i.
-32-45
+ 0-85
-32-45
+ 0-65
+ I3'4 2
+ 078
+ 13-4*
+ 070
+47-36
+ 076
+47-36
+ 076
+47-36
+ 076
-3*"45
+ 0-85
-32H5
+ 0-96
+ 13-42
+ 078
+ 13-42
+ 078
+47-37
+ 0-96
+47-37
+ 0-90
10-86
+ 0-81
+ 13-07
+ 0-80
8
+ 0-485
+ 0-362
+ OH70
+ 0-384
+ 0-382
+ 0-444
(+ 0-450)
+ 0-38I
+ 0-3I9
+ 0-330
+ 0-385
+ 0-280
+Q-353
+ 0-294
+ 0-294
I
+ 0-409
+ -342
Bradley 16728.?..
TT Auiiromedpe
2 Ursae Minoris ...
u. Andromeda^ ....
Groornbridge 3804.
Bradley 3147
2 Ursai Minoris ...
8 Andrornedse . ...
13 Andromedee
Bradlev 3 14.7...
Polaris
47 Andromedae
Polaris
2 Andromedie...
Bradley 1672 S.P..
Piazzi 0. 1 3
47 Andromedee
Polaris
Bradley 16728.?..
Piazzi 1 3
47 Andromedae
Bradley 1672 8.P..
Bonn i 34.
2 Ursae Minoris ...
u, Andromeda} ....
2 Ursie Minoris ....
/3 Andromeda;
Bradley 1672 S.P..
Piazzi 0. 74... .
Polaris
2 Ursse Minoris
u. Andromeda?
47 Andromeda)
Polaris
2 Ursse Minoris
a Trian ( *uli . . .
Bradley 1399 S. P..
IT,, Pei'asi
Polaris
Y Andromedse
Polaris
Bradley 2993
Groombridge 3804.
Bradley 3 1 47 . .
Bonn 1434
Bradley 1399 S.P..
67 Pegasi
Bradley 3147
78 Pegasi
Bradlev 200?...
260 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREEXWICH, MADE IN 1902.
Transit C Values of n continued.
Date.
Names of Stars.
Position.
Tabular
R.A.-
Observed
Transit.
Factors.
n
Apparent
n
Adopted.
Date.
Names of Stars.
Position.
Tabular
R.A.-
Observed
Transit.
Factors.
n
Apparent
n
Adopted.
1902.
Nov. 3
1
Bradley 3147
y aris-
E
E
W
W
W
W
E
W
W
W
W
W
W
w ;
E
E
E
E
continued.
m s
+ o. 6-34
+ o. 0-03
+ o. 7-29
+ o. 0-33
- o. 15-38
+ o. 0-27
o. 11-69
+ O. O'2I
+ o. 5.99
+ o. 0-44
+ o. 6-42
+ 0. 0-26
+ 0.23-62
+ o. 0-33
+ o. 19-25
+ o. 0-19
+ o- '573
+ o. 0-19
+ 1776
+ 0-47
+ 1776
+ 0-55
-32-44
+ 0-85
-32-44
+ 0-56
+ 13-42
+ 0-78
+ 13-42
+ 0-57
+4T37
+ 0-76
+47-37
+ 0-77
+47-37
+ o-77
8
+ 0-365
+ 0-404
+ 0-470
+ 0-361
+ 0-439
(+ 0-479)
+o'5oo
+0-409
!+"334)
H
+0-399
1902.
Nov. 4
1
Bradley 1399 S.P..
Groombridge 3804.
D am-
W
W
W
W
E
E
W
E
E
E
W
E
E
E
E
E
W
W
continued.
m s
- o. 4-63
+ o. 0-28
+ o. 4-86
+ o. 0-28
+ o. 5-88
+ O. 0-02
+ o. 7-31
o. 0-07
- o. 11-73
0. 0-02
- . H'47
0. O'OO
+ o- 4'5'
+ o. 0-14
+ o. 17-36
O. O"O2
+ o. 20-93
+ o. 0-39
10-86
+ 0-82
+ I3-07
+ 0-82
+ 17-76
+ 0-91
+ 1776
+ 0-55
-32'44
+ 0-46
-32+4
+ '45
+ 13-42
+ o-95
+ 47-38
+ 0-5
+ 47-38
+ 0-96
s
+ 0-420
+ 0-374
+ 0-348
+ 0-429
+ 0-356
+ 0-440
+ 0-350
+0-371
+0-442
8
+ 0-38 9
Bradley 3147
78 Pe<*asi
Groombridge 3804.
Bradley 3 1 47
Bradley 1672 S.P..
Bonn 134
13 Andromedae
Bradley 3147
Bradley 1672 S. P..
28 Andromedse ....
2 Ursse Minoris. ...
//. Andromedae
78 Pe CT asi
Bradley 1672 S.P..
\h Pe"asi
2 Ursfe Minoris
T Piscium
Bradley 1672 S.P..
Piazzi 148
Polaris
2 Ursse Minoris
41 Andromedse
47 Andromeda;
Polaris
Piazzi I. 170
v Pisciuin .
Polaris
Piazzi I. 170
XII. VALUES OF THE INSTRUMENTAL CONSTANTS I, m, AND n.
In the following tables the values of I (the level-error) converted into seconds of
time, the values of n and the deduced values of m are collected.
The values of m are derived from the adopted values of I (the level-error) and n by
the formula,
m = (I n sin X) sec. X where X is the latitude.
The adopted values for X are :
Latitude of Greenwich 51 28' 39" N.
,, Paris 48 50' 10" N.
TABLE OF INSTRUMENTAL ERKORS.
261
Transit B.
Date.
I
n
m
Date.
n
m
Date.
l
n
m
Pterit,
Paris.
Paris continued.
1902.
-
8
8
1902.
8 :.|
8
8
1902.
8 8
s
Mar. 1 8
+ 0-053
1-401
+ 1-681
Apr. 28
+0-198
+ 2-592
-2-667
Oct. 10
-0-0,9 +0-340
-0479
'9
-0-374
-0+53
-0-049
29
+0-246
+ 2-601
2 '6O2
'3
+ 0-01 1 | +0-438
-0-485
20
-0-371
0-265
0-260
'4
+ -95 , +'457
-0-379
23
-'359
-0-235
-0-274
May i
+0-115
+ 2-116
2-246
'5
+ 0-036
+ 0-437
-'445
25
0-291
O'l 14
0-310
3
+0-229
+ 2-401
-2-397
16
+ 0-132
+ 0-446
0-310
28
o- 1 1 1
+ 0-086
0-267
17
+ 0-189
+ 0-496
0-280
Greenwich.
21
+ 0-166
+ 0-503
-0-324
Greenwich.
Sept. 21
0-050
0-038
O-O32
22
+ 0-199
+ 0-494
0-264
Apr. 6
8
10
12
+ 0-043
+ 0-103
0-032
0-063
+ 1-048
+ 1-127
-1-1-698
+ 1-963
-1-249
1-251
2-184
-2-567
22
23
24
25
26
0-O2O
0-OI4
-0-045
-0-077
-0-045
+0-034
+0-060
0-014
0-036
0-072
-0-075
-0-097
-0-055
-0-078
+ 0-018
Oct. 25
26
27
Green
+ 0-015
0-031
0-070
icich.
+ 0-638
+ 0-642
+ 0-623
-0-777
-0-855
-0-894
! 3
17
18
o- 101
0-083
0-084
+ ''939
+ 0-829
+ 0-882
- -174
- "243
Paris.
2 9
30
+ 0-007
0-05 i
+ 0-703
+ 0-644
-0-871
0-890
20
-0-088
+0-927
- -305
Oct. 6
+ 0-124
+ 0-650 0-556
Nov. i
-0-085
+ 0-582
0-867
22
-0-055
+ 0-963
-298
7
+ 0-160
+ 0-656 0-508
2
0-003
+ 0-760
-0-959
23
0-113
+ 1-031
- '477
8
0-025
+0*420 ' 0-5 18
3
-0-039
+ 0-635
o'86o
24
-0-159
+ 1-017
- -548
9
0*092
+ 0-407
0-605
4
-0-053
+ 0-635
0-884
Transit C.
Greemoich.
Greemoich.
Greenwich continued.
Mar. 17
'9
20
21
22
23
25
-0-531 -0-034
+ 0-050 +0-450
+0-067 +0-481
+ 0-155 +' 6 79
+ 0-095 +0-853
+ 0-099 +' 8 33
+ 0-089 -1-0-966
0-810
-0-485
0-496
0-604
-0919
-0-888
1-071
April 27
28
May i
2
3
0-041
O'OO2
-0-025
-0054
0-Olg
+ 1-199
+ 1-316
+ 1-254
+ 1-259
-I-57I
-1-656
1-615
-I-637
I '6 I 2
Oct. 9
10
12
H
15
16
17
-0-086
0-069
0-051
-0-049
0-098
o 098
0-182
+ 0-014
+ 0-092
+0-171
+0-168
+ 0-094
+0-146
O'OI 1
O'I2O
0-227
-0-297
0-284
-0-275
-0-340
0-278
27
0-009 +0-687
-0-875
/
18
0-I2I
+0-023
O-224
28
0-013 +0-762
-0-979
Paris.
21
O'lOI
+ 0-091
-0-277
Paris.
22
-0-147
+ O'OI I
0-25O
April 7 ! +0-109
+ 0-327
0-209
Sept. 21
0-O29
+ 0-277
0-360
8 +0-135
+ 0-336
-0-179
22
0-083
+ 0-204
-0-358
Paris.
9 +0-239
+0-315
+ 0-003
24
+ 0-035
+0-398
0-401
n . +0-272
+ o-477
0-126
26
+ 0-059
+ 0-468
-0-445
13
-0-245
+ 0-233
-0-639
Oct. 25
+ 0-172
O-2I I
+ O-502
H
0-107
+ 0-419
0-641
27
+ O'OI I
+ O-28O
-0-303
17
18
0-128
-0-043
+ '343
+ 0-443
-0-586
Greemoich.
28
29
+ 0-064
+0-237
+ O-332
+ 0-461
0-283
0-167
19
+ 0-081
+ 0-652
0-624
3'
+0-199
+ 0-409
O-|67
20
+ 0-031
+ 0-530
-0-559
Sept. 29
O-I50
O"222
+ 0-038
21
+ 0-064
+0-562
-0-546
Nov. 2
+ 0-141
+ O'342
0-178
23
+0-064
+ 0-569
-'554
Oct. 2
-0-157
-0-II9
O-IO4
3
+0-219
+ 0-399
0-I24
24
+0-086
+ 0-605
0-562
8
-0-077
+ 0-043
-0-I78
4
+0-179
+ 0-389
-0-174
GREENWICH OBSERVATIONS, 1902.
262 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
XIIL CATALOGUE OF STARS.
The following stars were selected by M. Lcewy for observation during the
longitude work, and their mean R.A. for 1902'0 was computed at the Paris Observatory
under his direction. This quantity which is the mean of the Right Ascensions taken
from all available catalogues, reduced to the required epoch and corrected to make them
consistent with Newcomb's Equinox as explained in the section relating to stars used
for Azimuth Error on p. 235, is given in Column 3 of the following Table. Ephemerides
of apparent places were computed from these, also under M. Loswy's direction, and these
were compared with the observed transits, corrected for collimation, azimuth, and level,
to find a preliminary clock error. The mean of all the clock errors deduced from the
stars in each group of observations was then subtracted from the clock error from each
individual star to find the apparent error of the ephemeris of that star : and the mean of
these errors for each star from all the observations by each observer with the sign changed
is given in Columns 5, 7, 9 and 11, the number of observations being given in Columns
6, 8, 10 and 12. In Column 13 the adopted corrections to the computed ephemeris are
given, formed by combining the results found by the different observers with weights
proportional to the number of observations. These corrections were applied to the
apparent places of the ephemerides in calculating the final clock errors. This descrip-
tion does not apply to the circumpolar stars given in the list. In these cases the Tabular
Right Ascension and corrections given in Column 13 are repeated from page 236.
Name of Star.
Magnitude.
Tabular
Eight
Ascension,
I9O2'O.
Approximate
Declination.
Correction to Epliemeris.
Bigourdan.
Lam-din.
Dyson.
Hollis.
Adopted
Means.
Corr.
w.
Corr.
W.
Con-.
W.
Corr.
\v.
Corr.
w.
Cephei 51
5'3
5'i
6-5
57
3-2
5'3
4-2
4'9
37
5 '4
5'
5'3
5-8
5'i
y
h m s
6.54.43-23
7- 4-54'99
7. 8.42-40
7. 11.13-48
7. 14. 16-28
7- '7-*i'44
7.29.53-11
7.32.46-25
7.38.31-96
7.41. 11-39
7.47. 30-08
7.49.5678
7.55. 0-16
7. 57. 30-07
8. o. 12-97
+ 87. 12
+ 39-29
+ *5. 5
+ 41. 4
+ 22. IO
+ 40. 52
+ *7- 7
+ 34-49
+ H-38
+ 33-4
+ 27. i
+ 20. 10
+ 25.40
+ 28. 4
+ 88. 56
a
8
8
+ 0-62
o-oo
o-oo
o-oo
O'OO
O'OO
o-oo
O'OO
O'OO
O'OO
+ 0-01
+ 0'OI
+0-03
O'O2
0-46
'$
5
5
5
63 Aurigse ...
O'O2
+ 0-02
+ 0-04
O-O5
O-O5
O'OO
2
2
2
2
2
I
-0-13
0-07
0-03
O'lO
+0-03
+0-03
+0-04
O'OO
I
I
2
2
3
3
4
3
52 Gemiiiorum
64 Aurigse
8 Geininoruin
66 Aurigce ...
v Geminorum
o Geminorum
+0-04
O'O2
O'OI
O'OI
O'O2
O-O5
I
I
3
2
I
2
TT Geminorum
<f> Geminorum
85 Geminorum ....
to 1 Cancri
6 Cancri
Groombridge 1119.
CATALOGUE OF STARS.
263
Name of Star.
Magnitude.
Tabular
Right
Ascension,
1901 'o.
Approximate
Declination.
Correction to Ephemeris.
Bigourdan.
Lancelin.
Dyson.
HollU.
Adopted
Means.
Corr.
W.
Corr.
W.
Corr.
W.
Corr.
W.
Corr.
W.
ft Cancii
5 2
S'S
56
5' 2
4'4
5'9
i 9
O'O
4-'
6-2
S'S
4"2
5'6
4'7
S'
i]
3-8
3 '4
4'6
4'5
4'4
4-6
6-;
6-5
J'l
6-6
4'i
5'2
6-0
46
6-5
6-6
3-6
5-0
4'4
57
6-3
4-8
5'o
5-4
6-3
3'9
4'3
6-2
5-i
5-8
3'2
2-8
37
h ill 8
8. 1.59-92
8. 4. 33'o6
8. 7. 4-56
8. 14. 6-80
8. 16. 7-82
8. 20. 30-17
8. 22.48-21
8. 26. 32-88
8. 40. 46-15
8. 46. 45-86
8.50.53-84
8. 54. 16-85
8.57. 0-58
9. o. 17-89
9. 3.43-61
9- 7-23-83
9- 9' '3'45
9- i2-44'94
9.15. 5-23
9. 18. 56-92
9.23. 8-58
9. 26. 7-84
9-28. 13-35
9.32. i3'54
9. 36. 0-28
9.40. 17-41
9. 44. 12-86
9.47. 11-48
9.51.41-09
9.55.21-78
10. i. 39-09
10. 5. 4-64
10. 9. 28-78
10. 1 1. 11-40
10. 15. 28-07
10. 22. 13-17
10. 26. 17-65
10. 30. 44-08
10. 33. 12-43
10. 38. 5-36
10. 40. 25-06
10. 44. 30-66
10. 47. 50-00
10. 50. 18-51
10.52. 7-67
10. 53. 58-88
10. 59. 4-42
ii. 4. 9'43
II. 8.53-88
II. 13. 11-26
/
+ 21. 52
+ 25 49
+ 29.58
+ 27-32
+ 43-3I
+ 28.13
+ 24.30
+ 38.22
+ 29. 8
+ 28.43
+ 33- i
+ 42. ii
+ 24. 50
+ 38-51
+ 22. 27
+ 43-38
+ 35- 3
+ 37- H
+ 34- 49
+ 26.37
+ 81.46
+ 23-27
+ 36.51
+ 25. 8
+ 26. 22
+ 24.14
+ 4- 5
+ 26. 29
+41. 32
+32.25
+35.44
+ 41- 9
+ 31.58
+ 43-25
+ 84.45
+ 37- 13
+ 32. 54
+ 36.5'
+ 32.3
+ 23-43
+ 3i-i3
+ 28.30
+ 34-45
+ 25-17
+ 78.18
+ 40-58
+ 38.47
+ 45- 2
+ 21. 4
+ 33-38
i
s
H
8
0'02
+ 0-04
O'O2
O'O3
0-09
+ 0-08
+ 0-03
+ 0-05
+0-01
-0-13
+ 0-05
+0-03
+ O'o6
+ O-O2
+ O J 02
O-O3
+ O'02
-o 03
+0-03
I
2
5
7
6
6
3
2
6
6
5
4
3
4
4
6
6
s
00
O'OO
o-oo
o 03
0-09
+0-07
+004
+0-04
+ O'OO
0-12
+0-05
+ O'02
+ 0-05
+ 0-01
O'OI
O'OI
+ 0-03
0-05
o-oi
+0-01
+0-45
0-08
0-05
O'O2
+ 0-04
0-04
0-03
+ 0-03
+ 0-01
+0-03
+ O'02
0-04
+0-03
0-04
0-06
o-oo
O'OO
+0-06
o-oi
O'OO
O'OI
+ 0'02
O'OO
+0-04
O'OO
0-06
+0-04
0-04
0-03
o-oi
7
7
8
8
4
8
8
8
9
9
8
IO
n
15
H
5
3
6
10
18
21
25
21
16
18
18
'3
'3
1 1
20
21
21
'9
23
2 5
2 4
23
2 4
2 S
25
2 S
i/f 2 Cancri
i 5 Cancri
X Cancri
3 i Lvncis
<ft l Cancri
...
+ 0'O6
+ O'O6
+ O'02
+ 0-03
O'l I
+0-08
0'02
+ 0-04
O'OO
0-03
+ 0'01
+0-03
0-06
0-04
+ 0'OI
2
2
I
1
2
2
4
5
6
7
9
8
5
v 2 Cancri
Groombridge 1450.
i Cancri
p 1 Cancri
59 Cancri
10 Ursse Majoris...
v Cancri
Piazzi VIII. 245...
f Canci'i
36 Lyneis
19 Ursse Majoris ..
38 Lyncis
a Lyncis
ic Leonis
Piazzi IX. 37
A Leon is
O'lO
O'O2
0-04
+ 0-06
0-05
O-O2
+ 0-03
+ O-QI
+ 0-O2
+ 0-03
0-03
+ 0-05
0-03
3
4
3
7
8
ii
10
7
7
7
5
1 1
0-07
0-08
-o-oi
+0-03
0-03
0-05
+0-04
+ 0-01
+ 0-03
+ 0'02
O'O5
o-oo
0-09
2
3
6
I 2
I I
12
'3
IO
8
IO
9
7
10 Leonis Minoris .
1 3 Leonis
e Leonis
1 6 Leonis Minoris .
u Leonis
...
...
+ C'I I
O-07
+ 0-05
+ 0'O2
0-12
o-oo
+ O'I I
-o-.- 5
I
I
I
2
I
I
19 Leonis Minoris.
20 Leonis Minoris.
21 Leonis Minoris.
Piazzi IX. 254
22 Leonis Minoris.
X Ursse Majovis ...
Bradley 1399
/i Leonis Minoris ..
33 Leonis Minoris.
3 5 Leonis Minoris .
37 Leonis Minoris.
41 Leonis Minoris .
42 Leonis Minoris .
44 Leonis Minoris .
46 Leonis Minoris .
54 Leonis
...
...
0-09
0-08
+ 0-08
0-07
0-06
+ O'O2
O-05
O-03
O'OO
I
I
2
3
2
3
2
4
3
0-04
+ 0-O2
+ 0-04
+ O'OI
+ O'02
O'OO
+ 0-04
O'OO
+0-07
2
3
7
9
10
9
10
IO
I O
O'OO
+ 0-06
O'OO
o-oi
-0-03
+ O'O2
O'OO
+0-03
7
1 1
9
9
7
1 1
1 1
1 1
Bradley i 508...
47 Ursse Majoris ..
5 1 Ursae Majoris ..
i/f Ursse Majoris ...
S Leonis . ...
-0-13
+ O-QI
+ 0-02
... ' o-io
O'OO
3 o'oi
5
5 -0-03
3
2
6
5
0-05
+0-06
0-05
o'o6
0-03
o
9
8
i
7
0-06
+0-03
O-02
O'OI
O'OO
10
13
8
9
8
v Ursae Majoris ....
264 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Name of Star.
Magnitude.
Tabular
Right
Ascension,
1902*0.
Approximate
Declination.
Correction to Ephemeris.
Bigourdau.
Lancelin.
Dyson.
Hollis.
Adopted
Means.
Corr.
w.
Coi-r.
w.
Corr. W.
Corr.
\v.
Corr.
w.
58 Ursa; Majoris ..
Piazzi XI. ill
59 Ursse Majoris ..
5'9
5-8
5'S
5 "4
6-5
5' 2
6-4
6-4
5"'
57
5'9
5-8
6-3
4-8
5''
5-2
47
5'5
4'3
4'9
6'2
6-4
6-0
5'i
5''
2-8
S
6-1
4'3
5-0
57
47
5'7
6-4
6 '4
6-2
5-0
4'9
5'7
5-8
5'5
5-8
6-0
5-8
K
5-4
4-8
6-0
h m s
.25. 13 II
.31. 8'6o
33- 7+0
.35.41-40
. 38. 26-09
.40.13-94
.47. 19-97
n. 52. 12-13
11.57. 8-39
2. 5-47'53
12. 6. 52-90
12. II. 13-IO
12. 14. 23-61
12. 17.34-84
12. 19. 23-60
12. 21. 30-06
12. 22. 3-27
12. 26. 6-98
12. 29. 5-48
12. 29. 58-15
iz-34- 3'47
iz- 39-4975
12.44. 30-99
12.46.55-54
12. 48. 28-23
12. 51. 26-69
13. I. 9-62
13. 5.11-48
'3- 5-33-31
13. 7. 18-07
13. 9. 16-37
13. 11. 7-59
13. 13. 9-00
'3- 'S-55'53
13. I7.4 6 77
13. 19.27-40
13. 27. 0-81
13.30.25-34
13.33. 6-44
13.35.59-62
'3-4 2 - 4-38
13.42.46-38
13.44.13-44
13.46.49-79
13.48.43-72
13.52. 5-70
13. 56.43-90
14. 4. 0-64
14. 5-55-89
14. 10. 26-37
+ 43-44
+ 28. 20
+ 44- i
+ 21 - 55
+ 42. 16
+ 8-49
438.26
+ 4. 54
+ 43-36
+ 27. 50
+ 26. 25
+ 4'- 13
+ 88. 15
+ 26. 24
+ 26. 39
+ 2 7-49
+ 28.49
+ 25- 7
+4M4
+ 2 3- '4
+ 41.25
+ 44-38
+ 28. 6
+ 28. 5
421.47
+ 38. 5 2
+ 36. 20
+ 39- 4
+ 39- 2
+ 28.23
+ 40.41
+ 4i- 2 3
+ 41- 6
+ 40.41
+44. 26
+ 37-34
+ 42.37
+ 37-42
+ 36.48
+ 20. 28
+ 39-
+ 39- 2
+ 3I-4'
+ 35- >o
+ 29. 8
+ 27- 59
+ 27.52
+ 44. 20
+ 25-34
+ 42. o
a
+ 0-03
+ 0-03
o 06
I
3
I
+ 0-10
+ 0-10
+0-08
+ 0-05
O'OI
I
s
0-07
0-03
O'Ol
O'Ol
O'OI
+ 008
O'OO
+ 0'I I
0-03
0-06
+ 0-O2
0-08
3
i
4
7
7
7
4
12
9
1 1
12
8
s
O'OI
40-01
O'OO
0-04
+0-04
+0-03
+ O'I2
o'O4
0-04
+ 0-01
0-09
3
4
8
8
IO
4
4
9
IO
IO
5
B
O-OO
-1-0-03
+ 0-G2
+ 0'01
0-03
+ 0-06
+ 01
+ 0-11
0-04
o-oi
+ 0-01
0-09
+ 0-43
+ 0-03
40-03
+0-04
O'OO
+0-04
0-09
O'OI
0'02
o-io
40-06
+ 0-02
+ 0-05
+ 0-O2
O-O5
O'Ol
0'01
o-oo
+ O-02
+ O'O6
O - O3
+ O"OI
o-oo
+0-04
0-09
O'Ol
o-oi
+0-03
+ o'o6
0-18
+ O'01
o-oi
-0-08
4 01
O'OO
+0-07
0-07
+0-05
5
7
12
23
'9
17
'9
24
30
32
2 5
18
7
12
25
34
4 1
22
38
28
39
29
29
2 4
3
10
1 1
29
38
27
3'
3
'7
9
8
10
21
2 5
20
'3
30
35
2 7
2 4
21
'9
1 1
10
Piazzi XI. 146
Groombrklge 1830.
Groombridge 1841.
67 Ursse Majoris...
Piazzi XII. 3
O'OO
+ 0-08
0-04
+0-03
o-oo
6
5
5
5
2
+ O-O2
+ 0-13
O-07
+ 0-08
O'OO
O'lO
5
3
7
6
i
5
4 Comae
2 Canum Ven
Bradley 1672 ...
12 Comse
O'OO
2
O'OO
0-06
+0-03
i
i
9
O'O2
+0-04
+ 0'O2
2
6
+ 0-06
+ 0-04
+0-07
4
6
8
i 3 Com0e
14 Com*
i 5 Comse
+0-04
OMO
0-04
O'OO
0-08
+0-07
+ O-O2
+ 0-03
O'CO
0-04
-0-13
O'OI
O'OO
O'OO
+ 0-06
O'O2
+ O-QI
O'OO
-0-08
O'OI
O'OO
+ 0-04
+0-05
-0-14
4- o-oi
+ 0'OI
0-07
+ 0-03
+ 0-01
+ 0-06
0-05
+ 0'I I
7
7
5
9
5
i3
12
4
2
I
6
8
12
II
IO
12
7
4
4
10
12
6
9
12
'4
12
IO
I I
5
3
2
+0-05
0-09
O-O2
-0-13
+ 0-06
+ 0'I2
+ 0-06
0-05
0'O2
12
12
IO
12
IO
'6
7
4
5
+ O-O2
O'lO
O'Ol
-0-03
0-06
+0-05
+0-07
+0-08
o-oo
-0-08
O'OI
4
IO
7
6
8
6
4
7
2
I
+0-03
0-06
O'OI
0-03
O'lO
+0-05
O'OO
+ O-02
+ O-QI
0-05
+ 0-06
O'02
+ O'OI
+0-03
+ 0-08
0-03
+ O-O2
O'OO
+0-04
(0-25)
O'O2
+ O'O2
+ 0-03
-0-27
o-oo
O'O2
o-io
+0-03
0-03
+0-08
0-06
0-05
1 1
12
IO
12
5
8
1 1
8
6
5
3
5
7
9
5
9
9
3
3
i
2
5
3
2
5
7
5
4
2
3
3
3
23 Comse
9 Canuni Yen
GiMombridge 1919-
30 Comoe
3 i Comas
35 Coinse ..
a Canuni Ven
14 Cnnum Ven
1 5 Canum Ven
17 Canum Ven. ...
/8 Comse
O'OO
+ 0-01
+ 0-06
0-03
0-05
O'OI
+ 0-II
-0-13
O'OI
0-03
+0-04
+0-07
+ O'02
O'03
0-07
O'OI
O'O2
+ o - o6
0-09
+0-09
7
9
4
6
4
2
I
3
4
7
6
10
12
'4
9
9
7
IO
5
4
O-O2
+0-05
+0-04
0-06
+0-01
O'OO
+ O'O2
0-04
O'OO
O-O2
O-02
+ O'O2
O-26
+ O'O2
O'lO
+ 0'02
+ 0-03
+ 0-15
+ 0-03
7
8
7
6
5
5
5
i
2
2
2
I
2
I
I
I
I
I
I
Piazzi XIII. 27....
19 Canum Ven
20 Canum Ven
23 Canum Ven
Piazzi XIII. 71
Groombridge 1986.
Groombridge 2008.
Piazzi XIII. 136...
25 Canum Ven
I Bootis
Groombridge 2043.
Groombridge 2047.
B. F. 1898
B. F. 1905
Piazzi XIII. 235...
9 Bniitis ...
1 1 Bootis
Piazzi XIII. 316...
d Bcbtis
Groombridge 2089.
CATALOGUE OF STARS.
265
Name of Star.
g
1
1
s
<U
Tabular 2
Right .S|
Ascension,
1902-0.
3*0
i
Correction to Epbemeris.
Bij;ourdan.
Lancelin.
Dyson.
Hollis.
Adopted
Means.
Corr.
w.
Corr.
w.
Corr.
w.
Corr.
w.
Corr.
w.
A Bobtis
4-8
5 '9
37
4'5
5'4
6-0
6-8
5'4
4'9
5-0
5-8
4'9
5'5
6-5
5'4
6-5
5'
5'i
6-0
5-0
5'
5'4
6-2
5'5
57
6-0
6-6
2-5
7-2
5-8
I' 9
o-i
6-4
4-8
6-0
7'6
5'7
4'5
4-8
5-0
57
5' 1
4-0
6-5
I' 9
6-0
3'5
4'
h m a
H. 13. 51-23
14. I 5. 46-28
14.27.3641
14, 30.24-84
14.35- " 4 6
14.45. 15-91
14. 52. 18-04
14.55.51-42
14.57.48-89
15. 2.59-81
15. 4 9-93
19.28. 7-80
19.30. 57-28
19.33.29-93
19.36. 15-13
19.38.36-56
19.40.44-57
19.42.42-32
19.47. 5-62
19.49. '772
19- 52- 3777
19.56. 19-55
20. 7. 54'io
20. 10. 12-91
20. 12.35-50
20. 14.48-33
2O. l6. 42-19
20. 1 8. 42-66
20. 20. 5 1-09
20. 21. 20-55
2O. 23. 56-42
20. 25. 36-13
2O. 27. 15-88
2O. 30. 5-42
20.33. ''59
20. 34.24-30
20. 37. 4-53
20. 4 0. 37-03
20.43.35-48
2O. 46. 36-04
2O. 49. 42'! I
2O. 50. 23-00
20. 53. 31-16
20.55.47-89
21. 1. 21-96
21. 4.29-36
21. 8. 45-90
21. IO. 52-73
/
+ 36. I
+ 39- '5
+ 30-49
+ 30. ii
+44- 5
+ 38-13
+ 4'-3*
+ 39-4
+ 25.24
4-25. 16
+ 26.41
+ 34- 15
+ 29. 14
4-38. 10
+ 42.36
+40. i
+ 37- 7
+ 33.30
+ 38.28
+ 23-49
+ 34- 5
+ 36.46
+ 26. u
+ 28.24
+ 24.22
+ 36-41
+ 39- 6
+ 39-57
+ 23-58
+ 21. 5
+ 38. 7
+ 36. 8
+ 36.36
+ 34-55
+ 81. 6
+ 81. 5
+ 3>-58
+ 30. 21
+ 36- 8
+ 43-41
+ 82. 10
+ 27.41
+40.47
+ 4'- 57
+ 43-32
+ 29.48
+ 29.50
+ 37.38
+ 0-06
+ 0-07
0-04
o - o6
0-07
0-O2
+ 0-II
0-05
+0-03
O'OO
-o-i i
0-03
0-06
+ O'O2
0-09
0-05
0-06
+ 0-04
O'O2
+0-08
O'OI
+ 0-02
+ 0-10
o-oo
+ O-O2
O'OI
O'lO
+ O'O1
2
4
6
6
1 1
7
'7
18
16
3
I
2
2
3
2
3
4
2
4
4
2
2
3
4
I
I
I
l
O'OO
+ 0-02
O'OI
0-04
o-oi
O"O2
+ 0'1 I
+0-07
O'OO
+ 0'1 I
+ 0-08
+ 0-05
O-O2
O-O7
0-O7
0*04
+ o - o6
+0-05
+0-08
+ 0'01
+ 0-06
+0-07
+0-04
+ 0-02
0-03
0-07
II
5
'3
'3
1 1
1 1
9
'5
4
2
7
6
4
5
6
6
5
4
5
5
7
8
8
8
4
s
O'O3
+ O'I I
0-03
+ O-QI
O'O2
+ 0'08
O-O2
0-02-
0-04
O'O2
OO
+ 0-05
O'OO
O-02
O'OO
+ 0-05
4-0-04
+ 0-01
+ 0'O2
+ 0-05
O"O4
o-oo
O'Ol
+ O'O2
0-08
-0-07
I
I
I
I
I
I
I
I
I
I
3
3
3
I
2
2
I
I
3
4
2
2
3
3
4
H
o-oo
+0-06
O'OO
+ 0-03
+0-06
O'll
+ 0-06
+004
O'OI
O'OO
+ O'OZ
+ O'O2
4-0-02
0-05
f 0-05
0-03
+ 0-03
O-02
0-03
O'OZ
-O'o8
O'OO
+ 0-05
O'OO
+ O-O2
0-04
+0-01
+ 0-06
3
3
3
I
2
I
2
3
1
4
I
2
1
I
3
4
8
+ O'OI
+0-05
O-O2
0-04
O'O2
O'O2
+ 0'I I
+0-01
+0-03
O'OO
O'O2
+ 0-06
+ O'O2
+ 0-01
0-05
0-05
0-04
+0-05
+ O'O2
+ 0-07
+ 0'OI
+0-04
+ 0-06
+ 0'02
+ 0'OI
O'O2
0-08
0-03
o-oo
+ 0'O2
O'OI
0-03
+ O'O2
+0-04
+0-45
O'OO
+0-04
0-04
0-03
O'OO
17
13
24
21
21
23
17
34
20
22
7
9
1 1
9
12
9
12
'3
9
10
12
12
1 1
13
'5
'5
9
9
15
'5
1 1
14
16
'4
'9
21
'9
Groom t Bridge 2 loo..
p Bocitis
<r Bodtis
3 3 Bolitis
Groom bridge 2152.
B F 2044. .
40 Bodtis
o> Bodtis
c Bob'tis... . * ...
8 Cvcni
Q Cvttii . .
Groonibridg<; 2889.
Groombridge 2912.
i c Cveni...
IQ Cvcni..
i 3 Vulpeculse
2 c Cvffni...
20 Vulpeculse
24 Vulpeculas
2 6 Cvcni . .
Groombridge 3140.
y Cygni
Berlin B. 7685
Lalande 39329
+0-05
+ 0-01
0-03
+ 0-06
+0-07
4
4
2
3
2
+ O'O2
0-0}
O-03
O'OZ
+ 0-01
7
8
7
6
8
O'OO
+0-05
O'OI
+ 0-06
+0-05
2
2
I
2
2
40 Cvcni ..
42 Cvtnri ..
44 C\ 7cr ni
47 CvTin .
Bradley 2701
75 Draconis
4Q Cv <r ni
+0-04
0-09
0-06
+ 0-01
2
4
4
3
+0-05
0-03
O'O2
+ O'O2
7
8
7
7
O'OO
O'O2
O'02
o-oo
3
2
5
5
+ 0-06
O-O2
0-04
O'O2
2
5
5
4
;z Cvcin ..
X Cv tr ni
16 Cvni
76 Draconis
32 Vulpeculse
+ 0-01
+ 0-04
O'O2
+ 0-05
O'O2
0-05
4
4
7
9
7
6
-0-17
O - IO
+0-03
+ 0-01
+0-03
o-oi
o-oi
2
8
7
u
13
13
'4
O'OI
o-oi
0-03
+0-08
0-03
O'O2
6
9
!
+ 0-01
0-03
+0-03
O'OI
+0-04
+ 0-01
0-03
3
3
4
6
6
6
0-04
o-oi
+0-03
O'OI
+0-04
O'Ol
O-O2
8
21
'5
33
33
33
35
v Cveni
Groombridge 3351.
Cveni . .
Piazzi XXI. I
Cvcni . ,
T Cygni .
266 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Name of Star.
Magnitude.
Tabular
Right
Ascension,
1902 'o.
Approximate
Declination.
Correction to Ephemeris.
Bigourdan.
Lancelin. Dyson.
1
Hollis.
Adopted
Means.
Corr.
w.
Corr.
w.
Corr.
w.
Corr.
w.
Corr.
w.
a Cvani ..
4'5
6-2
7-4
4-6
5'
5'3
5'3
5 - 3
5'5
4'3
7-0
6-5
5-0
5'3
6-3
67
6-0
4-0
5-8
4'3
4-6
I 4
6-5
5-9
5-6
57
6-z
7'S
60
%
5'i
4-2
3'9
5'<
6-2
5'9
3-6
var.
4'9
5 '9
6-6
67
6-7
6-0
4-6
5-8
5-8
5'3
4'3
b m s
21. 13. 33-98
21. 15.27-65
21. ig. I 1-89
21.25.30-49
21. 30. 46-32
21.33. 1-24
21. 36. 20-30
21. 38. 26-2I
21. 39. lO'IO
21. 40. 12-36
21. 41. 29-99
21.41. 56-18
21.45.30-57
21. 48. 36-16
21.51.49-04
21. 56. 8-31
21.58.59-36
22. 2. 26-84
22. 4. 53'o8
22. 5. 38-05
22. 9. 40-65
22. II. 41-76
22. 14. 38-23
22. 17. 39-16
22. 21. 9'6l
22. 25. 32-8O
22.28. 6-38
22. 31. 5'8l
22.31.30-59
22.34.5178
22-37- 5'33
22.39.43-15
22. 41. 48-58
22. 45. 16-36
22. 47. 36-69
22. 48. 42-60
22.49.37-24
22. 57. 24-61
22.59. i'34
23. 2. 2O'22
2 3- 5-55'3
23. 8. 18-70
23. 10. 10-69
23. 10. 59-01
23. 13.44-29
23. 15.47-11
23. 20. 2-88
23.22.23-83
23. 26. 28-1 1
*3- 33- '9' 6 7
t
+38.59
+ 37-49
+ 86.38
+ 23- 13
+ 38. 6
+ 39-58
+ 4 2 - 50
+ 40. 38
+40. 42
+ 25. 12
+ 25. 8
+ 25. 7
+ 29-43
+ 25.28
+ 20.47
+ 32- 33
+ 44.11
+ 24.51
+ 32.42
+ 32.42
+ 39- '4
+ 37-i6
+ 37- 16
+ 4I-35
+ 85.36
+ 32- 4
+ 39- l6
+ 39- 5
+ 39- 8
+ 38.32
+ 39-43
+ 41. 18
+ 23. 3
+ 24. 5
+42-47
+ 50.21
+ 39-5I
+ 41-48
+ 27. 33
+ 24.56
+ 43. '
+ 28.55
+ 27-33
+ 27-43
+ 41. 14
+ 23- 12
+ 31-5
+ 42.22
+ 38.42
+ 42-43
8
0-05
O'OO
5
2
a
-0-03
+ O-O6
12
6
a
0*04
+ 0-06
7
4
s
O'OI
+ 0-04
6
7
g
0-03
4 0-05
+ 0-28
+ O'O2
0'02
0-04
O-05
+ 0'I2
O'O2
+ 0'08
O 02
+ 0-07
0-03
O'OO
+ 0'02
+ 0-03
O'OI
O'O2
O'Oj
O'OI
-0-39
+ O-O2
+ O-I2
+ 0-03
+ 0-25
O'OO
o-oi
O'OO
O'OO
O'o6
0-03
O'O2
+ 0-01
0-03
+ 0'O2
O'OO
O'OO
O'02
o'03
+0-04
+ o'o6
0-08
O'OO
+0-05
0-03
+ 0'OI
+ 0'OI
+ O'02
0'O2
0-06
3
"9
1 1
3'
32
36
29
4
27
10
23
38
45
33
29
4'
49
45
32
33
37
16
13
'5
26
28
42
4 2
S 2
54
54
39
3i
52
5
59
42
32
26
36
4'
37
27
8
16
Lund i oo 5 3
Groombridge 3548
2 Peeasi . .
+0-03
0'02
o 04
O-03
+ 0'1O
O-O2
+ 0-09
I
7
7
7
7
I
8
+ O'02
O'OI
o-oi
-0-0 5
+ 0-0 9
+ 0'08
8
12
9
12
6
9
+ O'O2
0-03
0-04
0-04
+ 0-16
' C 3
+ 0-08
0-04
+ 0-05
O'OI
O'O2
+ O-O2
O'O2
+ 0-02
0-03
O'OI
_O'O2
-0'34
+ 0-06
+ 0-12
+ 0-04
2
8
[to
IO
9
5
i
3
2
8
1 1
5
i
5
12
12
10
9
ii
2
2
0-02
O'lO
o'o7
+ 0'IO
0-02
+0-07
O'OI
+0-05
0-05
O'O2
O'02
+ 0'OI
+ O-QI
O-O2
0-03
O'OI
0-42
+0-03
+ 0-10
O'O3
4
6
7-
7
8
9
7
10
7
8
7
8
IO
12
12
I 2
6
10
4
i
74. Cvffni . .
7 ? Cygni . .
77 Cvcni ..
Bradley 2841
K Pegasi
Bradley 2851
Bradley 2852
+ 0-05
0-06
fO'OI
+ 0-04
+ O'O2
O'OI
o-oo
0-05
o-oo
-0-43
o-oi
+ O'I I
+ 0-01
4
8
IO
7
5
9
10
8
IO
9
9
3
2
+ O'I I
O'OI
+ 0'02
+ 0-03
+ 0-04
0-O3
0-03
O'OJ
-0-39
O'OO
+0-14
+0-04
7
'5
16
H
15
17
'5
'3
9
7
7
8
HPecasi . .
1 6 Pegasi
PiazziXXI. 339...
Leiden 9262
Groombridge 3655.
i Pe^asi ..
77.1 Pegasi
77-2 Pegasi
Piazzi XXII. 36...
i Lacertse
Piazzi XXII. 65...
Groombridge 3750.
Bradley 2993
38 Pegasi...
O'OI
O-O2
I
5
+0-03
+ O-QI
6
O'O2
o-oi
8
7
+0-05
O'OI
+ 0-05
+ 0'02
o'o5
O'02
O'OI
+0-03
O'02
+0-03
+0-13
+ O-QI
+ O'OI
O'OI
+O'o6
+0-03
0-09
+0-03
+0-03
0-06
+0-03
+003
o-oi
0-04
i
8
2
IO
'3
12
H
H
12
8
i
7
10
'3
12
8
IO
I
1 1
9
ii
12
8
2
Groombridge 3804.
Piazzi XXII. 159..
8 Lacertse
+0-05
o'o5
O'OI
O'OO
+ 0-02
0-05
O'OO
2
9
IO
9
1 1
'3
1 1
0-05
0-08
0-05
0-05
+ O'OI
o-oi
+ 0-O2
7
IO
1 1
16
'5
'5
'5
+ O'O2
O-O5
O'O2
+ 0'OI
O'OO
0-04
+ 0'06
9
IO
9
'3
H
4
5
i o Lacert;e
12 Lacertae
13 Lacertse
X Pegasi . .
w Peaasi ..
1 5 Lacerta:
Lund 10036
Groombridge 3919-
o Andromeda!
B Pe"asi ..
O'OO
0-04
O-O2
+0-04
+0-08
o - o6
7
'3
12
'3
8
2
O'O2
0-04
0-03
+ 0-04
+ o'o6
0-07
ii
20
15
22
9
18
+0-01
o-oo
0-07
+0-04
+ O'IO
O-I2
6
9
IO
12
7
2
c6 Peeasi...
6 Andromedse
w.B.(2)xxm. 95
Cambridge 13985..
6 1 Pegasi
+ 0-06
0-05
+ O-02
+ O'O2
+ 0-04
0'O2
2
5
7
8
6
2
+ 0-06
0-03
O'02
O"O2
O'OO
0-09
-0-13
ii
5
'3
10
5
4
4
+ 0-05
+ 0-01
O'OO
O'OO
+0-05
+0-05
0-05
2
7
IO
7
8
4
8
9 Andromedse
T Pegasi
6 7 Pegasi
1 3 Andromedse
14 Andromedse
i Andromedie
CATALOGUE OF STARS.
267
Name of Star.
Magnitude.
SJ .
Tabular
Right = |
Ascension, ^
1 902-0.
<Q
Correction to Epliemeris.
Bigourdaii.
Lancelin.
Dyson.
Hollis.
Adopted
Means.
Corr.
W.
Corr.
W.
Corr.
W.
Corr.
W.
Corr.
W.
K Andromedse
4'4
5'I
5'
6-1
6-5
6-5
4-8
6-0
6-0
*4
6-4
2 '4
4'9
S-8
6-5
5'4
6-6
5'2
?4
j;i
6-4
5 '9
7'4
5'3
6-2
4'i
4'5
5'9
5'3
2'3
4-6
4'9
6'2
S'o
4'9
5-8
22
6-2
4'2
S'l
5-8
6-6
6-2
37
6-0
6-1
5-0
5-8
1) 111 S
23-35-3474
23. 39. 3-60
23.41. 10-54
23.44.45-14
23.46. 37-42
23.49. 6-20
23.52.45-80
23. 54.29-52
23. 57. 3-00
2 3- 59- 34H 2
o. 1.31-47
o. 3. 19-22
o. 5. 13-50
o. 8.25-22
o. 9. 26-08
o. 15. 57-42
o. 18. 52-39
0.22. 57-33
o. 24. 56-93
o. 27. 38-80
o. 31. 38-67
0.34. 5-14
o. 36. 24-01
o. 40. 44-94
o. 43. 52-28
o. 44. 24-40
0.48. 5-12
o. 51. 18-67
o. 55. 16-65
0.57.23-58
. 2.23-08
4- i4'5 2
. 6.15-65
- 8.25-53
. 10. 50-81
. 14. 4-68
16. 34'03
. 1 8. 4-02
.23.24-04
. 28. 36-96
3'- 2-53
. 33. 28-06
. 35.48-86
. 38. 14-10
.41. 5171
.47.29-57
. 50. 6-32
. 50. 19-72
.52.27-97
.57.14-27
+ 43-47
+ 28.49
+45-53
+ 35- 5 2
+ 41. 32
+ 38.44
+ 24-36
+ 33- I'
+ 26. 34
+ 4'-33
+ 28.29
+ 2 8- 33
+ 45-32
+ 40. 30
+ 40. 30
+ 37- 2 5
+43-43
+43.5I
+ 29. 12
+ 27-45
+ 33- ii
+ 3. 19
+ 24- 5
+44- 20
+ 49- 27
+40-33
+ 36. 53
+ 37-58
+ 85.43
+ 40. 49
+ 43.26
+ 35- 6
+ 29- 34
+ 24- 3
+ 32.37
+ 26.45
+45- i
+ 37-13
+ 88.47
+ 36.44
+ 4- 55
+ 43- 53
+ 42. 7
+ 31-43
+ 37-28
+ 29. 6
+ 36.48
+ 36.46
+ 23- 7
+ 32.5
s
0-05
o-oo
O'02
4
4
7
i
0-08
O'O2
O-O^
4
8
9
8
O.O5
O'OI
0-07
0-08
+ 0-06
+ 0-08
+ 0-04
+ 0-05
+ 0-03
+ 0-05
+0-04
0-03
0-03
+ O'II
9
IO
10
3
2
3
7
7
8
5
5
9
6
9
O'O2
O'O2
O'Og
O-06
+ 0'OI
+ 0-08
o-oo
+ 0-09
+ O'02
0-04
+ 0-03
O-03
0-12
+ 0-08
+ 0-07
+ O-2O
+ 0'OI
0-04
0-05
-0-08
o-oo
+0-09
0-05
+O-QI
O'O2
O'O2
8
9
7
ii
8
10
10
3
9
10
ii
IS
5
12
I I
3
6
6
9
9
7
8
6
1 1
10
1 1
H
0'04
O'OI
0-06
0-06
0'OO
+ 0-09
+ 0-01
+0-08
+ O'O2
O'OO
+ 0-04
0-05
0-09
+ 0-08
+ 0-07
O'OO
0-05
+0-15
+ O-QI
0-04
0-04
0-08
+ 0-04
+ O-I2
O-o6
0-04
O'OO
0-03
0-24
+0-08
+ O-QI
0-03
O'O2
+ 0-03
+ O'O2
o-oo
O'O3
+ 0'06
+ 0-28
+ 0'OI
0-05
+0-03
o-oo
+ 0-10
+ O'OI
0-04
+0-14
+0-17
0-04
O'OI
25
31
33
H
H
2 3
37
26
4*
36
37
49
36
39
ii
6
2 5
26
21
38
41
2 4
30
7
42
35
34
"6
30
35
36
34
22
2 7
21
H
"6
10
II
8
6
10
H
9
4
13
1 1
78 Peasi...
i/' Andronipd e
W.B.( 2 ) XXIII. 907
Groombridge 4153.
Groombridge 4159.
\lt Pe^asi .
+ 0-03
+ 0-09
+ 0-05
o-oo
O'OO
0-05
O'I2
+ 0'08
'6
6
8
8
8
8
10
8
O'06
+ OMO
o-oo
+008
+ 0'OI
O'OO
+0-08
-0-08
0-09
+ 0-08
4
10
H
10
16
13
13
17
14
13
Lalaude 47034
85 Pegasi
Groombridge 4219.
Bradley 3212
a AndromedsB...
2 2 Andromedse
23 Andromedse
Piazzi 0. 13
p Andromedse ..
+ 0-03
+ 0-13
O'OO
O-O2
O-O4
0-09
+ O'IO
+ 0-II
i
9
8
7
10
10
6
O'O2
0-04
+0-15
o-oo
0-06
0-04
o - o6
+ 0-04
+ 0'12
2
3
7
8
7
ii
H
1 1
12
+ 0-02
O'll
+ 0-16
+ 0-04
O'O2
0-04
0-09
+ O'OI
+0-16
O'lO
0-07
O'OO
0-05
i
2
6
4
i
8
8
i
4
I
6
6
7
Groombridge 57 ...
Piazzi 0. 74
28 Andromedse
Piaz/i 0. 103
TT Andromedse . . .
8 Andromedaa...
Piazzi 0. 148
Groombridge 140..
Bonn 654
v Anclromedse
0-07
o-oi
0-05
10
7
4
0-05
+0-03
0-03
15
12
12
W. B. (2) 0. 1172.
p. Androinedse . .
2 Ursse Minoris
39 Andromed*
41 Andromedos . . . .
y3 Andromedie
r Piscium
+0-09
O'O2
O'OI
O'O2
+ 0-04
+ 0-05
+ 0-O2
O-05
+ O'O6
i
6
7
8
8
5
6
3
+0-05
O'OO
0-03
0-03
+0-03
O'OO
+o 02
0-O2
+0-05
2
12
'4
IS
16
12
II
8
2
+ 0'IO
+0-04
0-04
0-05
o-oi
+ 0-04
O'02
O'O2
+0-06
6
7
5
4
3
4
2
3
+ 0-03 6
O'o6 ! 7
+ 0-01 8
+ 0-02 I 6
+ O-03 2
-0-03 7
-0-03 i 5
+ 0-07 j 6
< Piscium
Piazzi I 29 .
v Piscium
Andromedaa ...
47 Andromedse
Polaris
Piazzi I. 104
+ 0-01
O'O2
+ 0-03
+ 0'O6
+ 0-03
o-oo
i
4
4
i
2
+ 0-01
0-09
+ 0-01
0-03
+0-15
+ 0-02
O-O2
+ O'I2
3
3
2
2
3
5
4
4
+ 0-01
0-06
+0-04
+ 0'OI
+0-03
+0-05
O'OI
+0-15
+ 0-12
0-07
o-oi
2
3
3
3
i
i
2
2
I
4
i
+ 0-03
0-03
+ 0-06
O'O2
0'08
+ 0-15
+ 0-I 9
O-oy
-0'08
2
2
2
3
6
3
3
4
3
v Andromedse ...
\ Andrornedse
Bonn 1434
Lalande 3 149
Piazzi I 170 . ...
a Trianguli . .
Bradley 253
Lund 870
A. Arietis
+0-04
O'OO
I
2
o-oi
+0-03
4
5
Trianguli
268 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Name of Star.
Magnitude.
Tabular
Right
Ascension,
I90Z-0.
Approximate
Declination.
Correction to Epliemeris.
Bigourdan. Lancelin.
Dyson.
Hollis.
Adopted
Means.
Corr.
W.
Corr.
W
Corr.
W.
Corr.
W.
Corr.
\v.
a Arietis
2-2
3'3
5' 1
4'3
6-6
6-0
5'8
6-4
5 '9
57
P
6-5
37
57
I' 4
6-0
var.
var.
6-1
6-0
h m a
2. 1.38-80
2. 3-4* - 57
2. 6.40-9,
2. I I. 29-14
2. 14. 20-54
2. 16. 44-19
2. 21. 39-27
2.24.22-54
2. 26. 57-49
2-34. 57-29
2. 37. 41-91
2.40.5471
2.44.12-78
2. 47-3' - 37
2. 51. 2O-28
2-53- 2'34
2.58.53-62
3- i-47'35
3- 3-42-84
3. 6.2374
+ 23. o
+ 34-31
+ 29. 52
+ 33-H
+ 29-45
+ 4- 57
+ 31. 21
+ 33-24
+ 34- 7
+ 26. 38
+ 27- '7
+ 35-35
+ 26.51
+ 37-56
+ 31-32
+ 79- 2
+ 38.28
+ 40-35
+ 28.42
+ 26.52
8
+ O'OI
0-03
+ O'I2
O-O4
+ 0-01
o- 1 1
+ 0-04
+ 0-14
O'OO
o-oi
0-03
2
I
2
3
i
i
2
2
2
I
I
a
O'O5
O-O4
O'OO
O'OO
+0-05
0-05
+ 0-O2
+ 0-19
O-O3
O'O3
O'O2
+ 0-09
O-O4
O-O3
O'OO
7
9
6
6
6
7
7
4
4
4
4
4
4
3
3
0-05
O'O5
O-O3
O-O4
+ O'OI
0-03
0-03
+0-15
0-08
O'O!
0-03
+ O'IO
0'O4
O'OI
0-07
2
I
3
3
2
2
2
2
2
2
2
2
2
2
I
i
'3
o 04
i
O'O4
0-04
+ 0'OI
0-02
+0-04
0-05
+ O-QI
+0-17
0-05
O'O2
0'O2
+ 0-09
o 04
O'O2
O'O2
O-O7
0-02
0-04
+ O-O2
O'OO
'4
12
IO
12
9
9
I !
6
8
7
6
/
6
4
7
5
/3 Tri&nguli
6 Trianguli
y Trianfuli
W. B. (2)270-1....
Piazzi II. 6 1
1 1 Trianguli ....
Lalande 4588
W. B. ( 2 )II. 581..
33 Arietis
35 Arietis
W. B. (2) II. 915..
41 Arietis
20 Persei
21 Persei
p Persei
0-05
O'O2
O'OO
+0-03
I
2
I
I
O'OI
0-04
+ 0-01
0-05
4
4
3
i
ft Persei
0-05
+0-05
+0-03
I
I
55 Arietis
56 Arietis
XIV. CLOCK ERROR.
The Clock Error was determined from observation of the stars given in the preced-
ing section. The following table contains the times of transit of these stars and of
the polar stars used to determine the Azimuth Error. Column 1 contains the star's
name ; Column 2, the position of the micrometer head, whether East or West. Column
3 gives the number of wires over which the transit was observed, or, in the case of
polar stars, the number of bisections made, as explained on p. 25 of the section
Paris-Greenwich Longitude 1888. Column 4 gives the reading at which the R.A.
micrometer was set during the evening for observations of clock stars, and the mean
of the micrometer-readings at which bisections were made for the polar stars. Column
5 gives, in all cases, the time of transit over the middle wire, set at the reading of the
R.A. micrometer adopted for the day. Column 6 gives the transit corrected for
Collimation, Level, and Azimuth Error. Column 7 contains the Tabular Apparent
R.A. of the stars taken from the ephemerides before mentioned, corrected by application
of the corrections given on pp. 262-268. Column 8 shows the difference of Columns 6
and 7, which is the Clock Error indicated by the individual stars. Column 9 is the Clock
Error at the local Sidereal time shown in the heading on each day, obtained from the
preceding column by the application of the clock-rate given subsequently. The
corresponding Clock Errors deduced from polar stars are given in Column 8, as a check
on the accuracy of the reduction, but are not given in Column 9, and they are of course,
not used in determining final Clock Error.
STAR-TRANSITS OBSERVED BY MR DYSON WITH TRANSIT R,
AND
RESULTING CLOCK ERRORS.
Star's Name.
.1
< S
Observed
Transit.
5 ^ ;
5 a*-**-
Star's Name.
<! 2
Observed
Transit.
III
-
11-1
5 111
1902 March 18.
9 Leonis
t Leonis
ju Leonis
19 Leonis Minoris
20 Leonis Minoris
W
W
W
W
W
A \JrsiK Majoris I W
Bradley 1399 | W
1902 March 19.
63 Auriga?
52 Geminorum
64 Aurigae
A Ursaj Minoris S.P. ,
u Geminorum
K Geininoruni
it Geminorum
Geminorum
85 Geminorum
Groombridge 1119 ....
Groombridge 1119 .
0' Oancri
v- Cancri
y Cancri
p 1 Citncri
19 Ursa? Majoris ...
38 Lyncis
K Leonis
A Leonis
21 Leonis Minoris .
5 1 Cephei .
S Gi-nuriorum
66 Aurigce
A Urs.e Minoris S. P.
A Ursre Minoris S.P. .
Geminormn.
6 Cancri
v Cancri
Piazzi VIII. 245.
f Cancri
36 Lyncis
19 Ursa; Majoris.
38 Lyncis ...
o Lyncis
Groomtiridjn'
1902 March 23.
\V
W
S.P W
10-350
10-350
10-708
10-350
11-362
11-891
10-350
10 9-554
10-400
10-052
11785
9 10-400
9
5
5
9
9
9 10*400
9
10 12*142
9.33- ''9'
9.41- 5' 6 9
9. 47. 59-89
9- 5 2 - 3'35
s
2-85
6*66
0*79
30-68
9. 56. 10-47 n'i8
IO. 12. 0-70 0-96
10. 16. 41-28 26-95
7. 5. 44-50' 43-99
7. 9. 31-58 31-24
7. 12. 3-13 "
7. 19. 51-51
7. 30. 42-44
7. 39. 21-31
7. 42. 0-9
7.48. 19-48
7. 50. 46-07
8. 2. 13-85
8. 2. 9-01
8. 21. 1975
8. 23. 37-62
8- 4'. 3577
8. 48. 35'34
9. 10. 3-26
9- '3- 34-78
9. 19. 46-64
9. 26. 57-36
10. 2. 29-03
2 "60
21-17
42*08
20-97
0-47
I9'I2
45'77
4576
47^7
I 9 -51
37-4I
35'5 2
35-09
2-94
46-41
57-16
28-70
6 - 55- 5 '43 . 45 '3 2
7. 15- 5"86
7. 18. 11-39
7.20. 4-51
7. 20. 8-58
7.48- I9-88,.,,-
7. 50. 46-49 | 46-10
7. 58. 19-98 | 19-55
8. 57. 50-66 50-25
9. i. 8-26! 7-77
9. 4. 33-66 33-26
9. 8. 14-44
9- 'o. 3'85
5-46
10-89
19-03
21-69
19-46
13-91
3'39
9- '3- 35' 2 ' 3476
9. 15. 55-41 54-98
9- '9- 4'''5 ' 44'89
15-94
19-80
'3 "97
4377
*4'33 '
14-08
40-07
57''3
44-35
15-68
7.7-49
55-I7
34-02
13-58
32-20
58-85
32-50
50-48
48-49
48-08
15-96
47 '4 1
59-33
10-23
41-68
46-91
46-86
4'82
46-9'
46'85
46-88
46-88
-46-86
-46-89
-46-92
-53-68
-46-91
-46-95
-46*89
-46-92
-46-92
-42-38
-43-69
-47-01
-46 93
-47 -03
-47-01
-46-98
-47-04
-47-08
-46-93
-47-02
59'43 45'
18*14
23*58
32*26
-47*32
-47-31
-46*77
32-26 : 49-43
3 2 ''3
5879
32-16
2-91
20-38
45-87
26-40
15-91
47'3 6
7-66
57'44
-47'33
-47'3'
-47'39
-47-39
-47'5'
-47-48
-47-40
-47 '3 2
-47'45
Paris.
-46-92
-46-87
-46-83
-46-92
-46-86
-46-89
44 Leonis Minoris.
46 Leonis Minoris.
54 Leonis
47 UrsfE Majoris....
51 Ursie Majoris...,
Paris.
-46-88
-46-91
-46-94
-46-93
-46-97
-46 91
-46*94
-46*94
-47*03
-46-95
-47*05
-47-03
-46*99
-47-05
-47-09
-46-94
-47-03
Piazzi IX. 254
22 Leonis Minoris..
A Ursa? Majoris
Bradley 1399
Bradley 2993 S.P. .
33 Leonis Minoris .
35 Leonis Minoris .
37 Leonis Minoris .
41 Leonis Minoris .
44 Leonis Minoris .
46 Leonis Miuoris .
54 Leonis
47 Ursse Majoris ...
Bradley 3147 S.P. ,
GroomhrMge 1841 .
Piazzi XII. 3
4 Corns
Bradley 1672
Bradley 1672.
Paris.
-47'34
-47'33
47-35
47 '4'
47'35
47-40
47 "40
47'5 2
47'49
47-4I
-47-33
9 Leonis
13 Leonis
Leonis
1 6 Leonis Minoris..
H Leonis
19 Leonis Minoris .
20 Leonis Minoris .
21 Leonis Minoris .
Bradley 1399
Bradley 2993 S.P.
33 Leonis Minoris .
41 Leonis Minoris.,
42 Leonis Minoris .
44 Leonis Minoris .
46 Leonis Minoris
54 Leonis
S Leonis
v Ursaj Majoris
9 10*350
9
9 ..
9
9
10. 45. 19-02
10. 48. 38-65
10. 51. 679
10. 54. 4776
11. o. 53-26
9 ; 10-350 10. 5. 5472
9
9
10. 10. 1 8 "65
10.12. 1-53
IO. l6. 31 "42
10*434 10. 21. 39-08
10-350 10. 27
10. 31.
j >o. 34-
j 10. 38.
I 10. 45
i 10. 48.
10. 50.
'o- 55-
: ii. 28.
11. 53.
9*515
10*350
10*360
12. 7.
12. 15.
7-64
34-19
2 '53
55-21
20*62
40*08
8*41
4 s '99
9*85
2*38
37'3 z
4276
58-44
I2'283 12. 15. 48-35
IO'4OO
9-390
I 1 "906
10-400
10-400
9- 33- 3'5 6
9- 3 6 - 50-47
9.41. 7-48
9-45- 3' 2 5
9.48. i - 66
9- 5 2 - 3'"5
9. 56. I2"oS
10. 2. 29*48
10. 16. 30*37
10. 21. 43'3I
10. 27. 7-98
10. 38. 55*64
10. 41. 15-44
10. 45. 21 -OI
io. 47. 40-40
10. 51. 8-83
11. 9.44-09
11.14. '7'
20-15
39'4>
7-86
48-28
53-88
5f33
18-37
I'n
26-92
44-36
7-22
337'
2"II
54-88
20-24
39-63
8-07
48-46
19*08
i-8 5
36-95
42-40
41-34
3-18
50*08
7*10
2-78
1*27
31*02
n-66
29-04
27-53
46-11
55' 2 4
15-00
20-58
39'94
8-42
4370
1-25
33' 21
52-58
21-05
' '47
7-08
3i '34
14-07
40*01
58-42
2O '2 I
4675
I4-98
7-84
33-20
52-58
2I"05
''47
34-26
14-81
49-98
55'37
49-82
34-99 ' 49-82
15-90
272
19-76
15-41
'3'93
437'
24-29
41-65
39-63
58-89
20-18
7-83
27-58
33''9
5 2 "57
21-04
5 6 '35
13-80
-46-94
-46-83
-46-81
-46-81
-46-80
47 -06
47*03
47*04
46*91
45 '94
47-01
46-96
47''3
47-04
47 '4
47-05
47-02
46-91,
-44*82
47-04
46*97
47-03
41*52
45''7
-47-28
-47*3 6
-47'34
-47-37
-47 '34
-47'3'
-47'37
-47'39
-47'90
-47-22
47*41
47'4 2
47-39
-47-38
47-45
46-95
-46*84
46*82
46-82
46*81
-47 "07
-47 '04
-47*05
-47*02
-46*97
-47*14
-47*05
-47*05
-47-06
-47'3
-47*00
-47-04
-46-97
-47'03
-47-29
-47'37
-47'35
-47-38
-47'35
-47'3 2
-47-38
-47-40
47 '39
47-42
47-42
47'39
47-37
-47'38
-47'35
-47-45
GHEENWICH OBSERVATIONS, 1902.
2 in
270
TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Star's Name. *
Position.
No. of Wires
R.A.
Micrometer.
Observed
Transit.
Corrected
Transit.
Tabular
Apparent
R.A.
>*
1) g *"
P
t:
-*-:
o *J ^ aj
Star's Name.
Position.
No. of Wires.
R.A.
Micrometer.
Observed
Transit.
Corrected
Transit.
Tabular
Apparent
R.A.
S-a
ill
o "ve
a
Clock
Apparently
Slow at i2 h
Sidereal.
1902 March 25.
Cephei 51
W
E
E
E
E
E
E
E
E
E
E
E
E
W
W
W
W
W
IO
IO
9
9
9
9
9
IO
IO
9
9
9
9
10
10
4
9
9
7
r
10*701
12792
M
F|
10-288
H-587
IO*4OO
J)
l|
'0-357
9-199
10*400
i
ii
h m s
6. 1-5. 48*10
6. 55. 48 *6o
7- 5- 44-97
7- 9- 32-21
7- ii. 3'48
7. 15. 6-03
7. 17. 11-48
7. 20. 14*28
7. 20. 20-95
7. 48. 20*02
7,49.46*63
7. 55. 50*09
7. 58. 19*99
8. i. 56*58
8. i. 50*55
8. 21. 20*l8
8. 23. 38*28
8. 27. 23*06
8. <;;. 7'iQ
s
45'44
45 '43
44'54
31-82
3-04
5*64
1 1 '04
21 "92
27*16
46*25
49*70
19-59
48*78
44-09
I9*8l
37*92
22*66
6*78
s
58*49
58-49
56-99
44^3
I5'54
18-14
34*86
34*86
32*10
5875
2'22
57*00
57*00
32*40
50*38
35-24
lq'54
46*95
47'94
47-55
47-59
47-50
47*50
-47-5'
47*06
Pa
s
47-56
47-60
47'5'
47-5I
47-52
47'53
47 '51
47 '49
47'47
47 '42 j
47-55 '
47-43
47*4-:
ris.
W
w
w
w
w
w
w
E
E
E
E
E
E
E
E
E
E
E
E
E
9
9
9
9
9
5
9
9
9
9
7
IO
9
7
9
9
9
9
8
8
8
r
10*400
it
> >
>
1 1
10*400
10*228
10*400
) *
Ii
M
>i
l>
1 >
1 1 '024
h m s
8. 57. 50*57
9. i. 8*15
9- 4-33'54
9- 33- 3 7'
9. 36. 50-64
9-4i- 7'54
9.48. 1*72
io. 2. 29*47
io. 5.55*43
IO. 12. 2*l8
io. 16. 30*44
IO. 21. 46*37
10. 48. 40*68
io. 51. 9*16
n. 5. 0*31
ii. 9.44-34
11.54. 2*93
ii. 58. 59'n
12. 6. 38*04
12. 7-43'55
12. 15. 46*03
s
50-21
775
33-18
3]35
5 *i8
''35
29*08
54-99
172
28-61
47-89
40*26
877
43-96
2 '49
58-65
37'64
43-15
41 "16
s
2*88
20-34
45 S 4
15-87
2-69
I9-74
4i'63
7*21
14*01
39'35
59-23
52*55
21 "03
I2*O9
56-34
14*82
10*96
50*OI
55-40
50*04
K
47'33
47-4I
47-34
-47-48
4 7 '44
47'44
47-45
-47*78
47'7i
49*26
48-66
4771
4774
-4776
47-62
47-67
47*69
47-63
4775
51*12
s
47-34
47*42
47-35
47-49
47-59
47-44
47-44
47-45
47-78
Cephei 51
Piazzi VII. 245
63 Auriyse ...
64 Aurigae
8 Geminorum
66 Auriga;
A Ursse Minoris S.P
Piazzi IX. 254
47-52
47-50
47-48
47-46
-5178
47-09
47"4!
47-54
47-42
.17 "4.4
Bradley 1399
47-7I
47'74
4776
47*62
47-67
47*69
47 63
4775
a' Cancri
Groombridge 1119
Groombridge 1119
Groombridge 1841 . ...
Piaz?i XII 3
i/ 2 Cancri
Groombridge 1450
Bradley 1672
io Ursse Majoris...,
1902 March 28.
46 Leonis Minoris..
54 Leonis
47 Ursae Majoris....
51 Ursae Majoris....
ifi Ursae Majoris
5 Leonis...
Paris.
Bradley 3147 S.P.
59 Ursa; Majoris....
92 Leouis
Piazzi XI. 146
{Virginia
Bradley 1672..
Bradley 1672.
14 Comae
xi Comae
W
9
W
9
w
9
w
9
w
7
vv
8
E
IO
E
5
E
9
E
9
E
9
W
IO
E
IO
E
5
E
9
1902 April 6.
{ Cancri
36 Lyncis
38 Lyncis
a Lyncis
K Leonis
Piazzi IX. 37.
10-400
8 '353
10-400
10*260
12*222
10-400
10-400
1902 April 8.
Piazzi VIII. 245....
38 Lyncis
a Lyncis
K Leonis
Piazzi IX. 37
Piazzi IX. 37
X Ursae Majoris
Bradley 1399
Leonis Minoris...
33 Leonis Minoris..
37 Leonis Minoris..
41 Leonis Minoris..
42 Leonis Minoris..
44 Leonis Minoris.
51 Ursse Majoris...,
i|< Ursae Majoris....
8 Leonis
v Ursae Majoris ....
Bradley 3147 S.P. .
Bradley 3147 S.P. .
W
9
W
8
W
9
w
9
w
10
w
IO
\v
4
w
IO
w
w
E
9
E
8
E
c
E
J
E
E
E
E
W
I o
W
ii
10-400
14-364
10*634
10*400
10*851
10*400
10-400
S'oio
9^37
10. 48. 40-30
io. 50. 8-86
io. 54. 49-13
10. 59. 54-80
11. 4. 59-76
n. 9. 44-14
ii. 28. 25 05
n. 33. 57-82
n. 36. 3172
11. 39. 16-54
11.41. 4-37
12. 15. 36-00
12. 15. 35-30
12. 22. 2O'45
12. 26. 57-33
9. 4. 0-56
9. 7. 40-44
9- n- 170
9. 15. 22*08
9- >9- i3'95
9- 23- 23-85
9. 0.
9. 13.
9- 15.
9- '9-
9. 23.
9.23.
io. ii.
10. 15.
10. 22.
to. 26.
10. 59.
I). 4.
11. 9.
n. 13.
ii. 28.
40*09
8*63
48*93
54-60
59-58
43*90
23-72
57'59
3 ''45
16*31
4-08
38*50
36-98
20'20
57-07
59'7'
4O*l6
1*22
21*53
I3*20
29*67
52'53
21*02
I-42
7-04
I2-O7
35*10
10*07
43*90
28-68
16-53
4974
4974
32*58
9 '49
45 67
26-13
47-3
7 '44
59*09
15*40
34*61
34-27
20*08
1-71
1*32
47-09
22'O2
21-55
7*40
13'96
13-27
59*06
22*25
28-78
15*13
22*36
28-89
28*24
28 06
13*81
4O'O6
51-08
37-35
3O*I2
29-73
15-57
34-80
34-28
2O'02
29-64
29*08
14-81
22*79
22"OO
77*
42-43
4I-83
27-45
48*01
47'34
33-07
21*69
21*31
6-95
26*45
26*29
11-97
11*44
10*59
56*28
28*55
28*02
1372
13-17
52*01
3670
12*71
5I-51
3670
47*56
47*61
47-5I
47*56
47-5I
47'57
48-62
47-52
-47-55
47*63
-47-55
-48*76
47*62
47-58
-14-04
-14*03
-14*09
-14*09
-14*11
-14-27
-14*19
-14*23
-14-15
-14-21
-13*65
-13*76
-14*25
-'373
-14-16
-14-26
-14*27
-14*29
-14-38
-14*27
-14-36
-14*32
-14-31
-14-30
-15*31
-14*81
-47-56
-47-61
-47 "5 '
-47*56
-47'S 1
-47-57
-47'55
-47-63
-47'55
-47 ' 6 2
-47*58
Canum Venaticum.
23 Comae
9 Canum Venaticum.
30 Comae
31 Comae
35 Comae
a Canum Venaticum.
Piazzi XIII. 27
19 Canum Venaticum.
20 Canum Venaticum.
23 Canum Venaticum.
Piazzi XIII. 71
Groombrid^e 1986
Polaris S.P. ..
Polaris S.P.
IO*4OO
Greenwich.
14*05
14*04
14*10
14*10
14-12
Bradley 2993 S.P
37 Leonis Minoris
41 Leonis Minoris
42 Leonis Miuoris
44 Leonis Minoris
46 Leonis Minoris
Greenwich.
-14-20
-14-23
-14-16
-14*22
14*26
14-17
14-27
14*27
14-29
-14*38
4-27
14*36
14*32
14*31
14*30
Piazzi XI. in
59 Ursae Majoris...
92 Leonis
Grooml ridge 1841 .
67 Ursse Majoris...
Piazzi XII. 3
4 Comae
Bradley 1672
Groombridge 1919 ....
30 Coma:
31 Comae
35 Comse
o Canum Venaticum .
2 Ursfe Minoris S.P...
/3 Conife
Piazzi XIII. 27
Polaris S. P.,
Polaris S. P.
W
\V
\v
w
W
w
10*400
9-967
9734
10-609
10*400
12. 29. 55-68 55-46
12. 30. 48-38 48*12
12. 34- 5377 53'55
12. 45. 2 I "3 3 21 'OS
12. 47- 45" 88 45" 6 3
12. 49. 18*55 l8'28
12. 52. 16*97 1674
13. io. 671 6-51
13. II. 57-91 57-72
13. 13. 59-13 58-93
13. 16. 45-81 45*61
13. 18. 37*00 i 36*81
13. 20. 17-61 i 17-41
13. 23.49-87 |45*59
13. 23.48-50 45-40
10-400
io 848
10*400
9*044
10*400
12*122
10*630
10. 21. 30-58
io. 33. 29-48
io. 38. 22-62
io. 40. 42-17
10. 44. 47*89
io. 48. 7*01
ii. 31. 25*97
ii. 33. 24*44
ii. 35. 58*92
ii. 52. 29*30
11. 57. 25*40
12. 6. 4*91
12. 7. 10-43
12. 14. 30-39
15-67
28-90
21*83
4^55
47*21
6*49
25-30
24*25
58-09
28*99
25*18
4-23
971
5*04
12. 40. 6*6 1 6*47
12-44- 48-37! 4772
12. 47. I2'gl
12. 48. 45 82
12. 51.43-70
12. 55.4i'<3
13- 7-35'34
13- 9- 33-37
13. 24. 2 26
13.24. 6-31
12*26
45*02
43*36
24*78
34*70
33-09
9*00
11*87
7'9i
0*6 1
5'99
33-51
58-02
30-74
29-18
18-84
10-09
11-41
57 '9 6
49*21
29-84
58*32
58-32
,* I -*7
1-4*83
773
27H7
33-09
52-46
II'IO
10*00
43-87
14*80
10*94
50*02
55-41
48-47
52-24
33-55
58-06
30 79
29-23
8*99
20-55
18-92
57-00
57-00
-47-55
47-5I
47-56
47'57
47*61
47-54
47"5 6
47*67
47*63
47 '5 2
47*65
47*60
47-57
47-27
47*08
-14*40
-14-07
-14-10
-14-08
-14-12
-14*03 !
-14-20
-14-25
-14-22
-14*19
-14-24
- 14-21
-14*30
-16-57
-14-23
-14-1-
-14-20
-14-23
-14-13
- I 5'79
-14*15
-14-17 j
-14*87
STAR-TRANSITS OBSERVED BY Mu DYSON WITH TRANSIT B., AND RESULTING CLOCK ERROKS.
271
Star's Name.
Obserred
Transit.
|H 1 l
3 S-S-! . 00.3=
II?! 1
sss
Star's Name.
OhMrved
Transit.
j - is
Hll
1902 April 10.
p" Cancri
59 Ciiiicri
y C;ineri
Piazzi VIII. 245
Cancri
36 Lyncis
19 Ursa- Majoris.,
38 Lyncis
Piazzi IX. 37
16 Leonis Minoris.,
fi Leonis
K
E
E
B
E
K
E K
W
W
1902 April 12.
36 Lyncis
19 Ursa; Majoris
38 Lyncis
o Lyncis
Groomliridge 3548 S.P
Piitzzi IX. 37
A Leonis
10 Leonis Minoris
16 Leonis Minoris
p. Leonis
19 Leonis Minoris
Bradley 1399
S Leonis Minoris..
1902 April 13.
i Cancri (
59 Cancri
10 Ursie Majoris
v Cancri
Piazzi VIII. 245
36 Lyncis
19 Ursa; Majoris
38 Lyncis
o Lyncis
Piazzi IX. 37
Pinzzi IX. 37
e Leonis W
16 Leonis Miuoris W
H Leonis W
19 Leonis Minoris W
21 Leonis Minoris W
Piazzi IX. 254 W
22 Leonis Minoris W
A Ui-sse M:ijoris W
Bradley 1399 ! W
Bradley 2993 S.P W
47 Ursie Majoris W
51 Ursa: Majoris W
*/ Ursa- Majoris W
! Leonis W
1902 April 17.
\v
W
w
w
\v
w
m
Piazzi IX. 254' |W
A. Ursa: Majoris
Bradley 1399
| Cancri
36 Lyncis
19 Ursa: Majoris ...
38 Lyncis
Piazzi IX. 37
10 Leonis Minoris.
21 Leonis Minoris.
Bradley 2993 S.P..
44 Leonis Minoris .
46 Leonis Miuoris .
54 Leonis
47 Ursae Majoris. ...
10*400
8.47. 3*51
8. 51. ii -56
8. 57. 18*62
2-23
10-47
17 20
o. 35'37 34-53
4. I 69 I or-l8
7.41-10 40 5 1
12-965
10*400
10-400
10-443
10-367
10*400
9-
9-
9-
9'
9. 13. 2-45
9- 23- 45' 6 *
9. 31 "08
30-06
"'53
28-91
9. 44. 30-18 29*43 15-13
9.47.29*39 28*06 13-71
477'
55 '93
2:63.!
20 -04 :
45-61 !
26-05.
15-61 I
47 '5 ,
9- 7-
9- 9-
9.13.
9. 15.
9. 19.
9.23.
9. 26.
9. 28.
9- 44-
9- 47-
o. 51.
41-48
3i'47
2-84
23 "26
5 3 '9
18-42
26-39
31-35
30-81
30-03
58-96
10^634 10. 15. 32-65
IO'4OO i IO. 22. 31 '17
10-400
6-932
I I 'OOI
10-400
H'212
10-651
IO'4OO
8.41. 4-35-
8. 51. 12-15
.8. 54. 34 62
8. 57. 19-24
9- .35'92
9- 7- 4i 54
9- 9- 3i" 6 9
9- J 3- 3"4
9- 15- 23-53
9.23. 18*23
9- 23- 44- 6 4
9. 40.
9- 44
9-47-
9. 51.
10. i.
10. 5.
10. 9.
IO. II.
10. 15.
IO. 21.
10. 54.
10. 59.
11. 4.
ii. 9.
30-77
30-09
59-04
57-38
22-65
47-33
29-27
33-37
44-83
16*97
22-68
27*27
12-75
10*400
7-617
10*400
9-479
10 10*240
10*400
9. 4. 1-65
9. 8.41-71
9. 9.31-52
9. 13. 2-92
9. 23. 25-51
9. 28. 3 1 '41
10. 1.57-33
10. 5. 22-80
10. 1 1. 29*53
10. 15. 43 93
10. 21. 31 '36
10.44. 49'33
10.48. 8-45
10. 50. 37*17
10. 54. 17-22
40-75
30:25
'"73
22"O2
18/42
29-24
24-64
30-22
29-86
28-41
58*IO
5' "45
30-09
2-80
10*79
33-75
17-51
34-S5
40-76
30-42
1-88
22-25
28-85
29*19
0-82
4I-33
3'93
2-38
30-07
30-86
5676
22*35
29-14
51-78
19-71
48*58
7*82
36-36
16-74
48-06
55-87
18-95
2-58
19-98
25*98
5-55
46-99
7-31
14-48
14-48
19-49
15-08
13-66
43-38
41-37
6-93
31*06
1373
3 6 '43
2-85
, 1-26
6*89
11*90
56-24
45'49
25-89
15-47
46*92
14-01
15-38
41-30
6-85
,3-65
3579
3-65
32-97
S-s-33
20-84
-14*52
14*54.
14-57
H-49
14-57
MH*
14-45
-14*48
14 06
14-30
26 -oo
15-57
47-01
7-33
3-59
14*60
9 9'
5 47
15-09
13*68
43*40
15-51
I4'75
14-68
14*72
14*69
14*83
14 64
1473
'475
H'77
'4'73
14*70
14-86
14*58
-1474
-14-92
-14-80
-14-93
-14-87
-14*78
-14*87
-14-89
-14-94
-I4-37
-14-71
-14-76
-14-72
-14*80
-14*78
-14-80
-14*81
-14-88
'477
-5"45
-14-10
-'479
-1475
-14*71
-14-67
-5-33
-15-44
-15-46
-15-46
-i6'o6
-15-48
-15-46
-15-50
-15-49
-15-99
-16*06
-15-61
-15-49
-15-52
-15-54
Greenwich.
-14-53 >
-14-55
-14-58 l
'4-5 [
-14-58
-'4'47
-14-46 j
--4'49 j
-14-31
-14-36
19 Leonis Minoris.
20 Leonis Minuiis.
Piazzi IX. 254
22 Leonis Minoris,
Bnidley 1399
I!radle--2 9 93 S - ''
Bradley 2993 S.P..,
Bradley 2993 S.P..,
35 Leonis Minoris.
37 Leonis Minoris.
44 Looms Minoris.,
46 Leonis Minoris.,
-H'77
14:70
-I4-74
-14*71
92 Leonis
Piazzi XI. 146..
'475
-1477
-14*78
-i4'74
-14*71
14*59
1 Virginia
Groombiidge 1841....
Piazzi XII. 3
4 Coma:
2 C-umm Venaticnm.
Briidley 1672
Bradley 1672
21 Coma;
ft Ciinum Venaticum.
23 Cointe
Greenwich.
-14*76
-14-94
-14-82
- T 4-95
-14*89
-14-80
-14-89
-14-91
-14-96
-14*78
-'474
-14-82
-14*79
-14-81
-14-82
-14-89
-14-78
-14*80
-14-76
-14-72
-14-68
v Ursae Majoris ....
Bradley 3147 S.P.
Pmzzi XI. i ii
59 Ursae Majoris...
92 Leonis
Piazzi XI. 146
{ Virginis.
Groombridge 1841
67 Ursa: Majoris
Piazzi XII. 3
4 Comae
Bradley 1672
Brailley 1672
14 Coniiie
Oanum Venaticum..
23 Conine
9 Camim Veuaticum. ,
30 Comae ,
31 Coma:
35 Comae
a Cinum Venaticum.,
Polaris S.P.
P.daris S.P.
Greenwich.
'5-35
15*46
-15-48
-I5-48
-15*50
15 '47 r
15-50
-15-62
-15-50
-15-53
-5'55
ty Ursa: Majoris
B L".onis
v Ursa: Majoris
92 Lonis ..
Piazzi XI. 146
| Virginis
Groombridge 1830....
Groombridge 1841
67 Ursa: Majoris
Piazzi XII. 3
4 Coma:
2 Canum Venaticum .
Bradley 1672
Bradley 1672.
14 Comae
W: 6
W 4
W 9
W] 9
W 9
W 9
w; 9
\V 10
W! 10
W 9
W 9
w; I
10-400
10-135
7-303
10-499
14-444
10*400
9.51.
9-55-
to. 5.
ID. 9.
10. 15.
10. 21.
IO. 21.
IO. 21.
10. 31.
10. 33.
10. 44.
IO. 48.
58-45
39-5-
21*97
46*61
33'5 6
4' 77
42-04
41-71
1*78
30*23
48-70
7*82
10-400 \ ii. 36. 0-25
In. 38. 44*04
10-400
11.40. 33-45
11. 52. 30*38
12. 6. 6-13
12. 7. 11-63
12. II. 31-OO
IQ'377 12. 14. 0-40
6-865 12. 14. I-70
10-400 ! 12. 26. 25-77
12. 29.23*41
12. 30. 17*05
I O '400
9779
10*400
10-400
.8*319
12*424
10*400
5'497
10-117
10*400
n. 13.29*68
ii. 28. 27-72
ii. 31. 27*28
" 33- 25-42
ii. 36. 0*36
ii. 39.44-18
11.40. 33-55
11. 52.
n. 57.
12. 6.
12. 7.
12. I 3 .
12. 13.
12. 21.
12. 29.
12. 30.
12. 34.
12. 44.
12. 47.
12. 49
12. 51.
30-58
26*55
6*52
12*03
57-55
59*11
49" ! 7
23-73
17*40
21*82
50-05
14-68
47-58
45-20
13. 24. 45*17
3-24. 43'54
10-205
10 8951
9 i o '400
ii. 4.
ii. 9.
n. 13-
n. 36.
ii. 38.
1 1 . 40.
11.47.
n. 52.
11. 57.
12. 6.
12. 7.
12. II.
12. 14.
27-74
I 2 "6 1
29'79
O'22
44-58
33-I2
38'57
30-69
26-79
6*27
11-74
3I-54
5777
38 41
21-27
45-49
49*86
'7 '45
17*72
'7'39
0-87
29*13
47 '44
6*82
31*18
29*51
4*60
10*04
30-15
1-81
3-11
24*12
22-60
15-32
28*37
50-80
2573
24-70
58-54
43'34
31-25
29-63
2577
4-91
10:36
57-33
58-89
47'5 6
22-84
15*60
20*90
48-46
13-08
4572
44'I3
43'44
24*06
6-98
31*11
36-96
2*19
2-19
2-19
46-54
1479
33'5
52-42
58-47 43*85
43-25 28-60
16-49
14-77
50*01
SSHo
15-56
47*27
47'27
9-52
7'93
0*64
13*67
37-85
11*07
9*96
43-84
28-59
16-48
'477
10*91
50*00
55'39
47-00
47-00
32*60
7-92
0*63
6'oi
33'5 6
58-07
30-80
29*24
ii -08 57-86
9*45 i 57*86
12. 14. 3S*oi
12. 21. 48-82
27*36
ir'73
29*14
59'35
44-13
32-05
38-03
30*2!
26*38
5'51
10-95
31*07
58-50
3*86
48-09
11-85
56*21
13*63
43-82
28-5.5
16*47
22-55
1473
10*87
49 '99
55-38
-5'53
46 'i i
46-11
-14*33
-'4'3S
-14-29
-14-38
-12-90
-15-26
-'5-53
-15-20
-14-33
-!4'34
-14-39
-14*40
-14*62
-14*65
-14*69
-14*74
-14*59
-14*64
-14-59
-14-54
-15*84
-14*60
-14-67
-14-68
-14*70
-12*95
-14-66
-14-74
-14-70
-14-75
-'477
-14-86
-14-86
-14-91
-14-97
-10*33
-11*89
-14-96
-14-92
-14-97
-14*89
-14-90
-15-01
-14-92
-14-89
-13-22
-11*59
15-51
15-52
15-51
-15-53
-15-58
-15-48
i5>8
15-51
15*52
-I5-57
5-54
12-39
1775
-I4-34
-14-36
-14-30
-14-39
-H'34
14'35
14-40
14*41
14-61
14*65
14-69
-474
14-59
14*64
14-59
-14-60
-14*67
-14*68
14-71
14*66
'474
1470
-1475
'477
14*86
14*86
14*91
H-97
-14-96
-14-92
->4"97
-14-89
-14*90
-15 *oo
-14-91
-14*88
15-52
15*51
'5'53
-15-58
-15-58
15-48
15*48
-15-51
15-52
i5'57
-I5-54
15*50
272
TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
'
Star's Name.
Observed
Transit.
A "
-*!
Star's Name.
-< 5
Observed
Transit.
l-l
sg .
I! 3
1902 April 17 continued.
21 Comae
Canuni Venatieum. ..
Groombridge 1919
o Canum Venaticum...
14 Canum Venaticum..
ft Comae
Piazzi XIII. 27
1902 April 18.
f Cancri
36 Lyneis
19 Ursas Majoris ...
38 Lyneis
a Lyncis
Piazzi IX. 37
10 Leonis Miuoris .
( Leonis
1 6 Leonis Minoris .
fn Leonis
19 Leonis Miuoris E
20 Leonis Minoria E
22 Leonis Minoris E
\ Ursa: Majoris ' E
Bradley 1399.
Bradley 2993 S.P. ,
Bradley 2993 S.P.
35 Leonis Minoris .
37 Leonis Minoris .
41 Leonis Minoris .
42 Leonis Minoris .
46 Leouis Miuoris .
47 Ursae Majoris ...
51 Ursse Majoris ...
fy Ursse Majoris
8 Leonis
1902 April 20,
38 Lyncis
a Lyncis
K Leonis
Piazzi IX. 37
9 Leonis
13 Leonis
t Leonis
16 Leonis Minoris .
p Leonis
1902 April 22.
a Lyncis E
K Leonis E
Piazzi IX. 37 E
10 Leonis Minoris E
f Leonis E
1 6 Leonis Minoris E
1^ Leonis K
19 Leonis Minoris E
20 Leonis Minoris | E
21 Leonis Minoris E
x Ursse Majoris.
Bradley 1399 .
Bradley 2993 S.P. .
33 Leonis Minoris.
37 Leonis Minoris .
41 Leonis Minoris .
42 Leonis Minoris .
44 Leonis Minoris .
46 Leonis Minoris .
51 Ursse Mnjoris....
$ Ursae Majoris
$ Leonis..
\V
w
w
w
w
W 10
W 1 9
W| 9
[OO
10-400
8-480
10-400
10*400
9'873
12718
10-502
10-400
10-400
10-400
10-400
t>
10741
i o -400
9-407
9-008
10-400
h m B
12. 26. 25-78
12. 29. 23-90
12. 40. 8*17
12. 51. 45'25
13. I. 28'17
13. 7. 36-86
13* 9- 34'94
9- 4-
9- 7-
9- 9-
9- 13-
9- 15-
9* 2 3-
9. 28.
9.40.
9- 44-
9-47*
9. 51.
9- 55-
10. 9.
10. ii.
10 15.
IO. 21.
IO. 21.
10. 31.
10 - 33-
10. 38.
10. 40.
10. 48.
10. 54.
10. 59.
11. 4.
II. 9.
1*93
41-90
3-04
23*39
25-03
31-52
35;5
30*02
59'35
40*29
47-35
29-69
41-90
32-67
32-29
272
31*04
24-16
4373
8-64
17-42
23-14
27-88
12-87
9- J 3- 3'39
9- 15- 2 3' 8 3
9- 19- 573
9. 23. 24-62
9- 3 2 - 3 2 '39
9. 36. 19-21
9. 40. 36-28
9- 44- 3 1 '55
9- 47- 3'48
9- '5.
9- 19-
9.23,
9. 28.
9.40
9- 44
9- 47
9- 5 2
9- 55
10. i
IO. II
10. 15,
IO. 21.
IO. 26.
10. 33.
10. 38.
10. 40.
10. 44.
10. 48.
10. 59.
11. 4.
II. 9 .
24-08
l6'O2
24-08
32-24
36-61
31-82
30-72
0-07
40-99
58-25
3'35
41 '20
3 3 '97
36-84
31-67
2 4'75
44 '3 5
50-01
9'i3
23-61
28-37
I3-37
25-00
2 3'47
7-82
4475
27-61
36-14
1-05
41-50
31 *O2
'47
22-76
29-88
30-94
35-01
30*60
29-22
58-86
39-58
46-63
29-25
49'99
20-26
19-88
2'1 I
3'33
23-28
42-98
7-98
16-92
22-58
27-48
11-94
276
23-1-;
14-87
29-63
31-50
18-35
35'38
31*00
29-62
2 3'44
15-19
2 9'35
3'- 6 5
35'73
31-31
29-89
59-60
40-29
57 ' 6 3
29-94
50-25
7-91
52-22
29-23
12'10
20-57
18-94
45 '47
25-87
! 5'45
46-90
7-22
13-88
!5'37
19-41
14-99
13-58
43 ' 2 9
2 3'93
30-99
13 6 4
35' & i
3-88
3-88
46-42
14-68
7'59
*7'33
52-32
1-19
6-83
11-83
56-20
46-86
7-18
58-86
I3'59
15-50
2-32
19-38
M'95
I3-55
7'H
58-83
13-29
15-29
'9'35
14-91
13-52
43*21
23*87
41*22
i i3'5 6
3476
20-29 4 '94
36-14 ! 19-83
30-96 ' 14-62
23-86
43-61
49-22
8-48
23*06
28-01
12-43
7-54
27-27
32*90
52*26
677
11-77
56-16
I
-16-30
-16-36
-16-06
- 16*36
-16-38
-16*40
-16-37
-16 39
-16-42
-16-41
-16-38
-15-49
->-5'35
-16*31
-16-32
-16-34
-16*32
-l6'22
-16-29
-16*24
-16-27
Greenwich.
-15-49
-15-56
-15-60
-15-52
-15-51
-I5'57
-'5 54
-15-58
-15-63
-!5'57
-!5'57
-i5'54
-i6'oo
-'5'57
-15-60
-15-61
-15-64
-'5'57
-15-65
-15-64
-15 '61
-14-38
-16-38
-16*00
-15-69
-15-65
-15-69
-15-65
-15-66
-!5'73
-1575
-15-65
-1574
-15-90
-15-97
-16*04
-1 6*00
-16-03
-i6'oo
-16-05
-16-07
-15-49
-15*56
-15 - 6o
-15-51
-15-50
-15*56
-i5'53
19 Cannm Venaticum.
20 Canuni Venaticum.
Polaris S.P ,
Polaris S.P
Polaris S.P
Polaris S.P. ..
Greenwich.
-15-60
-15-65
-15-59
-i5'59
-15-56
-15-62
-15*63
-15-65
-15-58
-15*66
-15-65
-15-62
-15-70
-15*66
-1570
-15-66
-15*67
-1574
-1576
-15*66
-1575
Bradley 3147 S.P. .
Bradley 3147 S.P. .
59 Ursie Majoris ...
92 Leonis
Piazzi XI. 146
| Virginis
Groombridge 1830 .
Groombridge 1841 ....
67 Ursae Majoris
PiazziXII. 3
4 Couue
2 Canum Venaticum .
Bradley 1672
Bradley 1672.
15 Comae
$ Canum Venaticum.
23 Comse
9 Canuni Venaticum.,
Polaris S.P.
Polaris S.P. .
Greenwich.
15*92
15-99
16-03
16 02
16-05
I 6 "02
16*07
1 6 "09
19 Leouis Minoris ....
20 Leonis Minoris ....
A Ursse Majoris
Bradley 1399
$ LeoniM Minoris
41 Leonis Minoris ....
42 Leonis Minoris ....
3 Cannm Venaticum.
Greenwich.
-16-32
-16-38
-16-38
-16-40
-16-41
-16-38
-16-40
-16-43
-16-42
-16*39
-16-32
-16*35
-16*33
-16*35
-16-33
-16-23
-16*30
-16-25
-16-28
v Ursae Majoris
Bradley 3147 S.P.
Bradley 3147 S.P.
Groombridge 1841....
67 Ursfe Majoris
Piazzi XII. 3
4 Comae
2 Canum Venaticum.
Bradley 1672
E i 10
Bradley 1672
14 Comse
21 Comte
Canum Venaticum
/3 Comre _...
Piazzi XIII. 27
19 Canum Venaticum
Polaris S.P
Polaris S.P.
9
10-400
7-733
10-043
i3'55
h m s
13. II. 26*17
13. 13. 27-54
13. 23. 52-90
13. 23. 51-22
I 3 . 23. 50-21
14-374 13. 23. 50-66
2 573
27*09
12-63
10-95
9 '94
10-39
10*19
1 1 -5 i
58-15
58-I5
58-15
58-15
-I5'54
-15-58
-14-48
-12-80
"'79
-12-24
-I5-53
- ! 5'57
7-910
9-230
10*400
10*400
10739
11-999
10-400
'5'3 2 3
10*176
n. 28. 9-70
ii. 28. 12*08
ii- 33* 2 5'95
ii. 36. 0*43
ii. 38. 4473
11.40. 33-37
ii. 47. 38*83
1 1. 52. 30*67
11. 57. 26-72
12. 6. 6*14
12. 7. 11*52
12. II. 31-51
12. 14. 35-10
12. 14. 32-70
12. 22. 22*26
12. 29. 24*05
12. 30. 17*13
12. 34. 22*l6
13* 2 3- 5 6 '77
13. 23. 59-17
52-85 38-86
55' 6 7
2 5'54
59'5i
44-26
32-24
38-26
30-19
26-32
5'37
10-72
31-04
2-61
59'39
21-50
23-60
16-27
2170
15-11
17-51
38-86
9-90
43'Si
28-54
16-46
22-54
H73
10-87
49-98
55'37
i5'5 2
45-84
45-84
576
7-90
0-62
5 '99
58-26
58-26
13-99
16-81
15-64
1570
15 7*
-1578
-.57*
-15-46
15'45
] 5'39
'5'35
15-52
16-77
'3'55
1574
1570
15-65
-15-71
16-85
19-25
-15-64
-15-70
-15-72
-15-78
-1572
-15-46
-i5'45
-'5'39
-'5'35
-15-52
-1574
-1570
-15-65
-15-71
10-400
11-815
10-400
9- 5i* 59-64J 59''3 43 - *5 | -S' 88
9. 55. 40-56 [ 39-82 23-9015-92
10. ii. 30*02 29*57 13*60 15'97
10.15.42*40 51*04 35*20 15-84
10.22.31*94 31-31 15-39, 15-92
10.38.24-41 23-50 7'57 i 15'93
10.40.44*04 43-27 27-30 i 15-97
12. 29. 24*45 2 3'95 7'89 ; 1 6 "06
-15-89
15'93
-15-98
! 5'93
15-94
-15-98
1 6 "06
10-400 ; ii. 13. 30-57
9-075 ii. 28. 13-31
8-326
10-400
10-308
1 2 '6 1 1
10-400
11. 28. 15-67
" 5 2 - 3i'45
n. 57. 27-52
12. 6. 7-0 1
12. 7. 12-54
12. II. 32-25
12. 14. 33-69
12. 14. 28"l8
12. 21. 49-66
12. 26. 26-68
12. 29. 24-65
7- 3771
9- 3574
13. II. 26-95
11-380 i 13, 24. 8-45
10-975
13- 2 3- 5575
29-89
55-20
57'54
30-96
27-12
6-21
11-71
3177
3 '37
25-82
24-19
36-92
35' 2 5
26-48
22-31
9 65
i3'57
39-98
39-98
14-69
10-83
49-96
55'35
1 5 '49
44-34
44'34
3 2 '57
9 '49
7'87
20-58
18-93
10-18
59-29
59-29
16-32
15*22
17-56
-.6-27
16-29
-,6-25
16-36
16-28
19-03
i3'55
16-31
-16-33
16-32
16-34
16-32
16-30
23-02
10-36
16-32
-16-27
-16*29
-16-25
-16-36
-16-28
-16-31
-16-33
-16-32
-16-33
-16-31
-16-29
STAR-TRANSITS OBSERVED BY MR DYSON WITH TRANSIT B., AND RESULTING CLOCK ERRORS.
273
Star's Name.
Observed
Transit.
sg .
-
His
Star's Name.
1
. V
Observed
Transit.
1902 April 23.
Greenwich.
38 Lyncis
a Lyiicis
K Leonis
Piazzi IX. 37
9 Leonis
13 Leonis
( Leonis ,
16 Leuiiis Minoris.,
ju Leoiiis
19 Leonis Minoris ,
20 Leonis Minoris..
Piazzi IX. 254
22 Leonis Minoris..
A Ursie Majoris
Bradley 1399
Bradley 2995 S.P.
33 Leonis Minoris.
35 Leonis Minoris.
37 Leonis Minoris.
44 Leonis Minoris.
42 Leonis Minoris.
Bradley 3147 S.P.
Bradley 3147 S.P..
92 Leonis
Piazzi XI. 146
Virginia
Groombridge 1830.,
10 '400
n
i >
10*062
10 '400
10*400
10 '6 1 3
9'59 6
io'4Oo
1 2 *o 1 5
14*140
10*400
9- '3- 3 '9
9. 15. 24*26
9. 19. 16*18
9. 23. 24*06
9. 32. 32*84
9. 36. 19*69
9. 40. 36*89
9- 44- 3 2 "3
9- 47- 3 J -4
9. 52. 0*36
9- 55-
10. 5.
10. 9.
10. 1 1.
10. 15.
1O. 21.
IO. 26.
10. 31.
10. 33.
10. 38.
10. 40.
3*18
2 3'49
15-21
29-62
31*83
18*71
35*86
31*40
30*06
5977
41-02 40*17
23*66 23*06
47'3 2
29*92
51*52
20*37
36*29
271
31*04
2 3 '94
43'7
30*44
41*92
35"i 2
37-12
3 '44
31*88
24*98
44*58
46*80
7*12
58*81
13*14
I5-45
1*27
i9"33
14*89
13*50
43'i9
23*85
6*74
30-91
I3-54
34-54
5-21
19*81
46*34
14*60
7'53
27*25
ii. 28. 16*49 56*97 40*29
11.28.14*60 55*10 40*29
ii. 36. 1*11 0*03 i 43*77
II. 38. 45'4O 44'84 ': 28*48
ii. 40. 34*08 32*71; I 16*43
>' 47- 39'54i 3 8 '86 ! '5
16-38
16*37
16*40
16*48
16*38
16*44
16-53
16*51
16-56
16-58
16-32
l6~J2
-16-41
16-38
16*98
15*16
16*48
16*37
16*44
16*41
16-45
16*68
14*81
16*26
16*36
16*32
16*36
- 16 40
-16*39
-16*42
-16-39
-16-45
-16-54
-16*52
-16*57
-16*59
-16-33
-16-33
-16-42
-16*39
-16*49
-16*38
-16*45
-16*42
-16*45
- 16*26
-16-36
-16*32
-16-36
Groombiidge 1841....
67 Ursie Majoris
Piazzi Xli. 3
4 Conine
2 Ciinuiii Venaticum.
Bradley 1672
12 Comae
13 Comae
14 Comae
Cauiun Venaticum.
9 Canum Venaticum.
Groombridge 1919
30 Comae
31 Comae
35 Comae
a Canum Venaticum..
2 UI*S;K Minoris S.P...
2 Ursie MiuorisS.P
/} Comae
Piazzi XIII. 27
15 Canum Veuatieum
19 Canum Veuaticum
Polaris S.P '..
Polaris S.P
Groombridge 2008.
Pi>izzi XIII. 136....
10*400
10-813
10*400
12*225
12*466
10*400
9*132
10*567
10*400
ii. 52. 31-62
11. 57. 27*80
12. 6. 7*14
12. 7. 12 67
12. II. 32*43
12. 14. 31*63
54*83
43-64
12. 17
12. 19
12. 21
12. 29,
12. 34.
12. 40.
12. 44,
12. 47,
12. 48,
12. 51
12.55.
23*16
9 22
1 5 '62
48*47
46*43
43 '.3*
12. 55. 41*69
13. 7.37-86
36*01
31*07
27*13
6*82
13. 9,
13. 5
13. ii
13. 24
13. 24. 10*93
13. 27. 20*39
13. 30. 45*14.
3 1 *oi
27*28
6*29
1 1-69
31-83
3'35
42*68
49*14
24*39
22*57
874
50 07
47-39
45-76
28*19
26*57
36-93
3 5 '4
30-41
26-54
i7'35
21 -42
19*84
44-44
14-67
10*81 i
49 '95 I
55'34 i
15*48
43 '9 j
37'33 '
26*08
3 2 '5 6 i
7*87 !
5*96
52-19
33-55 '
58*06 |
30*79 |
29*21 i
10-30 i
20*58
1893
13 99
10*18
59*66
59*66
3*26
27*86
-16*34
-16*47
-16*34
-16-35
-16*35
-19*45
-16-52
- l6 "60
-16*58
-16*52
-16*55
-16*55
-16 52
-16*62
-16*60
-16*55
-17*89
-16*27
-16-35
-16*47
-16*42
-16-36
-17-69,
-21*76
-16*58
-16-58
-16*34
-16*47
-16*34
-16*35
-16*35
-16*52
-16*60
-16*58
-16-52
-16-55
-16*55
-16*52
-16*61
-16*59
-16*54
-16*34
-16*46
-16-41
-16*35
-16*57
-16-57
1902 April 24.
Greenwich.
Piazzi IX. 37
E Leonis
IJL Leonis
19 Leonis Miuoris..
\ Ursse Majoris
35 Leonis Minoris..
37 Lconis Minoris..
42 Leonis Minoria..
44 Leonis Minoris.
46 Leonis Minoris
54 Leonis
47 Ursae Majoris
51 Ursfe Majoris
^/Uisre Majoris
S Leonis
y Ursse Majoris
58 Ursa; Majoris
Bradley 3147 S.P
Bradley 3 147 S.P. .
Groombridge 1830 .
Groombridge 1841 .
67 Ursae Majoris....
Piazzi XII. 3
4 Comae
E 10
\v
W
W
W
W
B
B
E 7
E i 9
E; 9
E 9
E 9
W; 9
W! 8
W 10
E 10
10*400
10*400
10*382
7*894
10*400
9. 23.
9- 4-
9. 47.
9. 52.
10. 1 1.
10. 31.
10. 33.
10. 40.
10.44.
24*51
37'4
31*27
0*66
30*92
3*89
32*19
44*79
10.48. 9-51
10. 50. 38*34
10. 54. 18*31
10. 59. 23-96
11. 4. 28*84
ii. 8. 13*74
ii. 13. 30*91
ii. 25. 32*48
ii. 28. 14*70
ii. 28. 17*35
n. 47. 39*82
11. 52. 31*92
n. 57. 27-94
12. 6.
12. 7
7-51
12*95
29*90
3 5 "94
30*22
59'99
30*31
3*09
31*28
43-85
49*62
8*64
37*26
17*62
23*21
28*29
12*57
30*02
31*88
55^5
39*06
31*23
T 34
6*49
1 1*90
12*99
19*32
'3'49
43''7
13*52
46*33
i4'59
27-24
32*88
52*23
20*76
i '09
674
11-73
56-14
'3'55
15*50
40*60
40*60
22*49
14*66
10*80
49'94
16*91
16*62
16*73
16*82
16*79
16*76
16*69
16*61
16*74
1 6 *4 1
16*50
16*53
16*47
16*56
16*43
16*47
16*38
'4'55
16-41
16*57
16*57
-16*54
16*55
16*57
- 16*64
-16*75
-16 83
-16*80
-16*77
-16*70
-16*62
-16*75
-16*42
-16*51
-16*54
-16*48
-16-57
-16*44
-16*48
-16*38
-16-57
-16*57
-16*54
-16*55
-16*57
2 Canum Venaticum W 9
Bradley 1672 W 10
Bradley 1672
13 Comae
14 Comae
j3 C.mum Venaticum
23 Compe
9 Canum Venaticum
Groomliridge 1919
30 Comae
31 Comae...,,
35 Coin*
a Canum Venaticum
2 Urs-e Minoris S.P
2 Ursie Miuoris S.P
3 Comae
Piazzi XIII. 27
19 Canum Venaticum
20 Cauum Venaticum
23 Canum Venaticum
Piazzi XIII. 71
Groombridge 1986
Polaris S.P
Polaris S.P.
10*400 | 12. II. 32*66 31*98
10*578 12. 14. 30*74 1-93
11-582
i o "400
10*903
I3*l8o
IO*4OO
9*709
12. 14.
12. 19.
12. 21.
12. 29.
12. 30.
12. 34.
12. 40.
12. 44.
12. 47.
12. 48.
12. 51.
12. 55.
2572
4375
50-17
25*14
18*39
23*26
9-42
51-22
'579
48*66
46*63
43'39
12. 55. 41*19
13. 7.38*12
13. 9. 36*22
13. ii. 27*42
13. 13. 28*70
13. 16. 15*32
13. 18. 6*47
13. 19. 47*28
13. 24. 5*08
10-090 13. 24. 10-73
56*94
42*70
49"'5
24*48
17*27
22*59
8*85
50*20
'477
47'5'
45-88
28*37
26-18
37-11
35'5 2
26*75
28*02
14*62
5*90
46-49
16-19
21-79
I5'47
43*46
43*46
26*08
32*56
7*86
0*60
5^5
52*18
33'54
5 8, *o6
30*79
29*21
10*45
10*45
20*58
18*92
10*18
11-51
58*07
49-3 1
29*97
0*05
0*05
16*51
18*47
-13-48
16-62
16*59
16*62
16*67
16*64
16-67
16-66
-16*71
16*72
16-67
17*92
16*73
16*53
1 6*60
16-57
16-51
16*55
16*58
16*52
16*14
21-74
16*51
-16*62
-16-59
-16*62
-16*67
-16*64
-16*67
-16*66
-16*70
-16-71
-16*66
-16*52
-16*59
-16*56
-16*50
-16*54
-16*57
-16*51
1902 April 28.
Paris.
54 Leonis
47 Ursae Majoris....
51 Ursae Majoris ...
^ Ursae Majoris
8 Leonis
v Ursae Majoris
58 Ursae Majoris ...
Bradley 3147 S.P. .
Bradley 3147 S.P.
Piazzi XI. 146
67 Ursae Majoris....
12 Comae
13 Comas
W
W
W 9
W! 5
W q
10*400
10*434
10*400
10. 51. 13*79
10. 54. 52*93
10. 59. 58*76
11. 5. 3*29
II. 9.49-17
II. 14- 5-89
II. 26. 7*14
II. 29. 21*12
II. 29. 23*OO
11. 39. 20*13
11.58. 2*28
12. iS. 30*05
12. 20. 18*87
12*33
52'49
58*15
3*19
47'49
4*92
6-93
33*81
20*71
i "02
6-67
n-66
56-09
13-50
'5 '44
41*76
34*71 41*76
19-80 28-42
2 -06 1 0*7 5
28*65 j 37-3
17*48 26*05
-51 '62
-5' "47
-51*48
-5''53
-51*40
-51*42
-51*49
-52*05
-5 2 "95
-51*38
-51*31
-5'"35
-5 '"43
-51*62
-5 ''47
-51*48
-5'"53
-51*40
-51*42
-51-49
-51*38
-51*31
-5i'35
-5' '43
9 Canum Venaticum .
30 Comae
2 Ursae Minoris S.P. ..
2 Ursae Minoris S.P..
Comae
Piazzi XIII. 27
19 Canum Venaticum
20 Canum Vniaticum
23 Canum Vonaticum
Piazzi XIII. 71
Groombridge 1986
Polaris S.P
9 10*400
5!
10 9*489
7'47
10*400
9*462
' 2 - 34- 5771
12. 45. 26*22
12. 56. 40*49
12. 36. 38*81
13. 8. 13*26
13. 10. 10*76
13. 12. 1*95
13. 14. 3-30
13. 16. 49-86
13. 18. 40*85
13. 20. 22"O6
13- 2 5- 57'49
57-3I
24-91
3-28
1*58
11-97
10*30
'54
2*87
49-40
40-70
21 '36
53'33
5*92
33'53
1 1 '03
ii '03
20-57
18-91
10-17
11-50
58-06
49'3'
29-96
1-58
-5f39
-51-38
52-25
-5'55
51*40
5i'39
5I-37
5i"37
5''34
-5i-4!
5175
-5i'39
-51-38
-51*40
-5-'39
-5"37
-51-34
-5''39
-51*40
274
TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Slur's Name.
Observed
Tranit.
lr
,
x ? *
III
III
- =.;._.
Star's Name.
Observed
Transit.
1902 April 28 continued.
Polaris S.P
Groombridge 2043 .
Groombridge 2047..
Groomliricige 2089..
A Bootis
Groombriilge 2100.
/Bobtis
1902 April 29.
Piazzi IX. 254
Bradley 1399
Bradley 2993 S.P.
1902 May 1.
41 Leonis Minoris ' E
46 Leonis Minoris E
54 Leonis ! E
47 Ur.sse Ma.joris I E
51 Ursa; Majoris ' E
<j> Ursae Majoris ! E
S Leonis | E
v Ursa; Majoris E
58 Ursa; Majoris i E
Bradley 3147 S.P E
Piazzi XII. 146 ;W
Groombridge 1841 i W
4 Comae ! W
2 Caimin Venaticum W
Bradley 1672 W
Caiium Venaticum..
23 Comfe
9 Canum Venatieum.
Groombridge 1919
30 Coma;
31 Coma;
35 Comae
a Canum Venaticum .
1902 May 3.
37 Leonis Minoris I W
42 Leonis Minoris .
44 Leonis Minoris .
46 Leonis Minoris .
54 Leonis
47 Ursffi Majoris....
i)/ Urste Majoris
$ Leonis .
W
\v
W
\v
W
W
W
v Ursa? Majoris I W
Bradley 3147 S.P W
92 Leonis E
{ Virginia I E
Groombridge 1830 E
Groombridge 1841 1 E
67 Ursse Majoris.,
Piazzi XII. 3
4 Com;e
i Canum Venaticum.
Bradley 1672
11 Coma; ...
9'5'3
10-400
10*400
6-532
12-307
10-400
10-477
10*400
10-392
10-400
10-400
12-590
10-400
10-544
10-400
13. 25. 54-04
13. 42. 58-98
13.43.40-77
14. ii. 20-84
14. 14. 46*08
14. 16. 40194
14. 22. 4972
10. 5.58-45
10. 15. 59'28
10. 22. 34-66
10. 39. 0*48
10. 48. 44*63
10. 51. 13*64
10. 54. 53-10
10. 59. 58*89
ii- 5- 3-33
11. 9. 49' 11
ii. 14. 5-90
ii. 26. 7-14
ii. 29. 13-00
ii. 39.
11. 53.
12. 7.
12. 12.
12. 14.
12. 29.
12. 30.
12. 34.
12. 40.
12.45.
12.47.
12. 49.
12. 5 2.
20-28
6-63
48-07
7'34
24-09
43'9'
26-I6
M
-i
j- / - I 49
23*75 22
21*26 2O
49-83
58-39
40-18
20-48
45 -^
40-37
47'97
58-10
14-83
59"'5
4383
12-38
52*67
58-32
3-18
47-66
5-04
6-89
33-53
'93
-19
,- 5 8 j
6 98
4874
28-97
53-78
48-88
56-46
6-63
33'3'
6-74
7'43
52-12
20'6/
0-97
6-62
1 1 *6 1
56-06
13-46
I5'39
42-58
'6 9
46-85 55-28
28-37
14-58
-
92 ' 15-40
"40 ' 40*61
21 i 7*80
J J J
'57 I 5 -3
"32 I 377
69 i 29-17
10.34. 7-18]
10. 41. 19-88
10. 45. 25-64
10. 48. 44-67
10. 51. 13-68
10. 54. 53-06
ii- 5- 3'39
11. 9-49-33
n. 14. 6 '04
ii. 29. 20 "79
ii. 36. 36-96
II. 41. 10-22
II. 48. 14-78
II. 53. 6'8o
11. 58. 2-73
12. 6.42-85
12. 7-48-35
12. 12. 7-62
12. I 4 . 17-36
12. 1 8. 30-31
6-29
18-91
24-52
43'9i
12-39
52-62
3'37
47-83
5'22
36*15
3-T5 2
8-18
14-26
6-46
2 '60
4I7I
47-13
7*30
32*85
29*09
27-10
3275
52-09
20-64
0-94
11-57
56-03
3"43
43">7
43*68
16-34
22-39
'4'55
10*68
49-87
55*26
15-37
39-77
37-26
Pmnt;
0'57
5-90
5Z-I2'
-48*25
-51-41
-5-44
-51*51
-51-49
-5i 49
-51-51
-5 ''47 ;
-51-52
-5'"59
-51*72
-51-71
-51-71
-51*70 I
-51-70!
-5I-57
-51-60
-51-58
-51-50
-50-95
-51*56
-51*61
-5-"57
-51*52
-4979
-51-41
5-'S4
51-52
51-61
51-51
-51-40
-5- '43
-51-50
-51-48
-51*48
-51-50
Boiitis E
a Bootis...
40 Bootis .
a Bootis...
i|* Bootis...
c Bootis ...
6 Bixitis...
Paris.
41 Leonis Minoris W
v Ursa; Majoris W
r h m s
10*400 , 14. 28. 31*62
,, j 14. 31. 20*14
I 14. 56. 46*09
i j 14- 5 8 - 44'47
,, I 15. i. lo'iS
.. 1-5- 3-55'34
.. !l 5* 5* 5'35
10-400
10. 39.
11. 14.
'35
5-80
3 "47
18-96
45-55
43-01
8-84
53-88
3'97
58-87
4-91
27-38
53'95
5' '49
7'33
2'37
12-46
7'45
13-48
Paris.
-5' 73
-51-72
-51-71
-51*70
-51-70
-5'"57
-51-60
-51-58
-51-50
-51*56
51-61
51-52
5i'4i
5' - 54
51-52
51-61
51-51
-5''55
51*52
2 Ursae Minoris S.P IW 10 \ 8*322 12.56.33-83 3-42
2 Ursa; Minoris S.P.
14 Canum Venaticum
ft Comse
Piazzi XIII. 27
19 Canum Venaticum
20 Canum Venatieum
23 Canum Veuationm
Piazzi XIII. 71
Croombriclge 1986
Polaris S.P.
Polaris S.P
Piazzi XIII. 136
25 Canum Venaticum.
i Bootis
B. F. 1898
Piazzi XIII. 235
9 Bootia
ii Bootis
Piazzi XIII. 316
E 10
Paris.
-51*84
-51*81
-5'77
-51-82
-5 l "75
-51-68
-51-80
-51-80
-51-79
-52-92
-51-84
-51-84
-51-87
-51-91
-51-92
-51-84
-51-87
-5' "93
-53-08
-51-83
-51-85
-51-82
-51-78
-51-82
-5'75
-51-68
-51-80
-51 '80
-5I-79
51-84
51-84
51*87
51-91
15-92
51*84
51-87
51*93
13 Comae
14 Comae
(8 Canum Venaticum.
23 Coma? ,
9 Canum Venaticum.
Groombridge 1919 ....
30 Coma;
31 Comce
2 Ursae Minoris S.P. .
14 Canum Venaticum
20 Canum Venaticum
23 Canum Venaticum
Piazzi XIII. 71
Groombridge 1986
Polaris S.P
25 Canum Venaticum
i Bootis
Groombridge 2043
Groombridge 2047
7-802
10-400
12. 56. 32-61
9-906
10-400
13. 2.
,3. 8.
13. 10.
13. 12.
13. 14.
13. 16.
13. 18.
13. 20.
13-24
II'OO
2-14
3-47
50-11
41*12
22'2I
2-18
3-65
!'55
3-04 j
49*66
40-92
13- 25- 36-35 55-20
13. 25.
13. 31.
'3- 34-
13. 36.
>3-45-
'3- 49-
'3- S3-
'3- 57-
14. 4.
34-69
20-13
1-29
55-3i
8-63
38-96
1*09
39-3I
55-22
10-400
10-648
i o -400
9-798
10-400
12. 20. ig-ll
12. 22. 25'53
12. 30. O*o6
12. 30. 53'82
12. 34. 58-09
12. 40. 44*09
12. 45. 26-53
12. 47. 51*08
12. 56. 37-22
13. 2.
13. 14.
13. 16.
13. 18.
13. 20.
13.25.
13- 34-
13. 36.
13. 42.
13-43-
4-58
3-72
50-33
41-26
22-40
5 '74
1-48
55-60
59'3i
41-06
19-49
o'6o
53^4
7-67
37-84
59^5
38-17
55-02
17-91
24-39
59'79
52-44
5779
44-04
25-40
49-95
2-83
3-92
3'39
49 '97
41-19
21-82
56-88
0-86
54-09
58-83
40-58
-51-52
-51-58
-51 "60
-51-52
-51-51
-51-51
-51-51
-5I-5I
-51-51
-51-50
-51-50
-51-50
-51-42 5I-42
-5I-43 5-"43
11-42
1 1-42
52-00
50-76
1 2 "06 I
20-56
10-15
11-48!
58-04
49' 2 9
29-95
5' "59
5''55
51-66
51*58
51-56
51 -62
51-63
51 '62
2 '60
2'6o
2y86
8-96
2-23
'5 "99
46-19
8-27
46-47
3" 2 7
26-02
32-50
7-78
0-56
5-88
52-10
33'5
58-02
11-71
12-05
11-47
58-03
49-28
29-94
3'35
8-95
2-23
6-97
48-74
52-60
-51-89
51-63
51-64
51-61
51-68
51-65
51-68
51-70
51-75
-51-89
-51-89
-52-01
-51-88
-51-91
-51-94
-51-90
-5i'93
-51-87
-51-92
-51-94
-51-91
-51-88
-53-53
-51-91
-51-86
-51-86
-51-84
5 '"59
5i"55
51-66
-51-58
51-56
51-62
5"" 6 3
51-61
-51-62
-51-63
-51-60
-51-67
-51-64
-51-67
-51-69
-5174
-51-89
-51-89
-52-01
-51-88
-51-91
-5''94
-51-90
-51-93
-51-87
-51-92
-51-94
-51-91
-51-87
-51-90
-51-85
-51-85
STAR-TRANSITS OBSERVED BY MR DYSON WITH TRANSIT B., AND RESULTING CLOCK ERRORS.
275
Star's Name.
Position.
No. of Wires.
K.A.
Micrometer.
Observed
Transit.
Corrected
Transit.
Tabular
Apparent
K.A.
Clock
Apparently
Slow.
Clock
Appaieutly
Mow at o*
Sidereal.
Star's Name.
Position. 1
No. of Wires. 1
R.A.
Micrometer.
Observed
Transit.
Corrected 1
Transit.
Tabular
Apparent 1
E.A.
Clock-
Apparently
Slow.
>._
^i^-s
S2; =
5j fc.
^ Isa
a 35
%9 m
1902 September
21
K
E
E
22
E
W
w
E
E
E
B
E
E
B
E
V
E
W
\v
\v
\v
w
\v
w
w
\v
w
w
w
9
8
10
10
IO
9
IO
7
9
9
9
9
9
9
9
IO
9
9
9
9
9
7
9
"
9
9
9
9
9
9
9
9
9
7
9
9
8
8
9
IO
9
9
9
9
IO
IO
9
9
9
9
9
9
10
9
9
9
9
9
9
9
9
r
10-440
13-322
11-193
12-418
10-496
11-778
10-440
D
1 1
i >
>i
>
ii
10-535
io'44O
jj
n
M
9'6oz
10*440
M
))
> )
10-440
))
)i
ii
j >
n
10-440
13-230
5-721
10729
9''57
10-440
H
l
lO'OOO
9-800
10-440
n
M
M
M
>
9-985
10 440
i
9 1
1 >
>
h m a
21. I. 2O '05
21. 15. 25-90
21. 23. 0'97
18. 54- 5579
8. 54- 53'93
'9- '9-47*57
19. 19. 44-27
19. 30. 54-65
19. 33. 27-14
19. jo. 12-29
19. 38. 33-78
19.40. 41-85
'9- 4z- 3974
'9- 5*- 35'*3
19. 56. 17-08
20. O. 20-82
20. 14. 45'86
20. 16. 39-67
20. 1 8. 40-07
20. 26. 1 3 '58
20. 30. 3-18
20. 32. 59-27
2O. 37. 2'22
20. 49. 41-92
21. 8. 43'92
21. IO. 50-78
21. 13. 31-97
21. 15. 25-80
21. 30. 44-54
21. 32. 59-44
21. 36. 18*56
21. 38. 24-67
21. 40. io"66
21. 41. 28*15
21.41. 54-43
21. 45. 28-76
22. 4. 5 I -44
18. 54. 54-63
1 8. 54. 54 '68
'9- '9- 43 '5
19. 19. 43-07
19. 40. 4175
19. 42. 39 60
19. 52. 35-06
19. 56. 16-90
20. o. 20-84
20. o. 19*07
20. 7.51-55
20. 10. 10-42
20. 12. 33-03
20. 14. 45 '85
20. 1 6. 39-52
20. 1 8. 40-15
20. 34. 23-08
20.46. 33-97
2O. 50. 20-98
20. 53. 29-12
21. I. 19-94
21. 4-27-57
21. 8. 43-99
21. 10. 50 86
21. 13. 32-16
lo'oo
25-85
1-18
54'97
5379
4773
46-32
54-60
27-10
12-25
3374
41-81
39-69
35-18
17-04
19-11
4S78
39'59
39'99
13-50
3-09
59'23
2-13
41-88
43-84
50-70
31-89
2572
44-42
59'35
18-48
24-58
10*56
28-05
54*33
28-66
51-38
5 5 '47
54'85
42-81
40-49
41-64
39'49
34*95
1679
23-11
'9'59
5 1 '45
10-32
32'93
4574
39'4i
40-04
22-95
3 3 '9
20-91
29-05
19-87
27-50
43'92
579
32-09
25-48
3''33
7-06
0-59
0-59
50-23
50-23
O'lO
32-61
1772
39-21
47'3
45-21
40-68
22-50
20-55
5 ''39
45''9
4572
19-09
8-69
6-08
7-87
47' 6 7
49-42
56-29
37'5 6
31-32
50-04
4 '97
24-09
30-15
16-16
337
59-98
34'3 Z
56-98
i "69
1*69
47 **
47-28
47 '2 5
45-16
40-63
22-45
23-11
23-11
57-22
i6'oo
38-63
S''34
45'i4
45-68
28-17
39'37
2'33
34'53
2 5'43
32-88
49'39
56-26
37'53
5-48
5-48
5-88
5-62
6-80
2-50
3-91
5'5
5'5'
5 '47
5 '47
5 '49
5'52
5'5
5-46
1-44
5-61
5-60
573
5'59
5-60
6-85
574
579
5'58
5 '59
5-67
5 -60
5-62
5-62
5-6,
5'57
5 '60
5'65
5-65
5-66
5 "60
6-22
6-84
4 '47
6 79
5-6,
-5-67
5-68
5-66
o'oo
3'52
577
5-68
570
5-60
573
5-64
5-22
5 '47
5 '42
5-48
5'S6
5'38
5 '47
5 '47
5 '44
Greet
5-48
5-48
Greet
iwicli.
Piazzi IX 37 S.P
V
\v
W
w
w
w
w
\V
vr
w
\v
E
E
E
E
K
J
K
E
It
K
W
\v
E
E
E
W
W
B
B
K
B
B
E
B
W
E
E
B
E
K
K
E
B
E
E
E
E
W
W
w
w
\v
E
w
\v
\v
w
w
w
E
6
9
9
4
10
7
9
9
9
9
9
9
9
9
ii
g
9
9
9
9
9
9
IO
10
IO
8
9
9
9
8
9
9
9
IO
9
IO
7
10
5
9
9
4
9
9
9
IO
9
9
9
9
9
8
4
IO
IO
9
7
9
9
9
IO
IO
r
13-697
10-440
>
)>
7'554
10-440
i
i
10-440
ii
1 1 -440
1 1 -440
10-440
ii
ii
>j
>
n
12-308
11-561
13-894
10-440
vi
10*440
1 >
io'44O
n
>}
>
10*716
7-636
8-614
7 '494
8-844
10*440
H
H
M
j >
10-315
10-440
>
10-440
II
) t
n
12-274
11*912
i o '440
>
i >
> >
9 '344
10-031
h m s
21.23. 1-45
22. 57.23-65
22. 59. O'Ol
23. 2. 19-02
21. 23. i'66
21. 45. 28'83
21. 48. 34-36
" S 1 - 47'34
22. 2. 25*24
22- 4- 51*54
22. 5. 36-46
22. 9. 38-97
22. II. 40-42
22. 15. 14-49
22. 21. 21'47
22. 28. 5'10
22. 39. 42*00
22. 41. 47-11
22.45. 14-89
22 57. 23-59
22. 58. 59-94
23. 2. l8'85
23. 28. I2'62
23. 28. 13-82
23.27. 7-91
23. 33. 1877
23. 35- 34'4
23. 39. 2-36
23.41. 9-87
22. 2.25-17
22. 5 . 36-38
22. 9. 3878
22. II. 40-27
t2. 15. 16*48
22. I 5 . 13-55
22. 21.45-34
22. 21. 2l79
21.23. i'95
22. 34. 50-55
22.37. 4''3
22. 39. 42 "06
22. 41.47-19
22. 45. 14-98
22. 47-3572
22.49. 3 6 ''7
22. 51. 58-38
22.57.23-65
22. 59. 0-03
23. 2.18-97
23- '3-43'37
23- '5-4579
23. 20. 1-67
23. 22. 22-88
23. 28. 14-65
23. 28. 14-65
23. 39. 2-42
23.41. 9-82
0. 3. l8'I2
o. 5. 13-02
o. 8. 24-67
o. 13. 19-48
o. 13. I9'6g
s
1-89
23*55
59'95
18-96
1-15
28-75
34-28
47'25
25-16
5*'45
36-37
38'93
40-38
14-02
21-88
5-06
41-96
47 '5
14-84
23'55
59-89
18-80
12*62
13-82
14-80
18-73
34-00
2-28
9-80
25-10
36-32
3873
40*22
1570
12-77
46-08
22"IO
'77
50-48
4-06
41-99
47-12
14-91
35-65
36 '10
58-37
23-58
59-96
18-90
43-26
45-69
1-56
2277
13-81
'4'39
2-32
971
18-02
U'yi
24-56
20-86
19-99
7-06
29-08
5-48
24-40
7-17
34'33
39'94
52'X4
30-76
56-99
41-98
44-36
45'4
18-79
27-40
10-58
47*47
52 '63
20-39
29-08
5-48
24-40
' 9 '43
"9'43
'9'43
24'35
39'5'
7 '94
15-40
30-75
41-96
44-35
45-83
18-91
18-91
50-61
27-28
7"4
55'95
9-58
47-46
52-62
20-38
41*16
41-61
3-80
29-07
5-48
24-39
48-82
51-28
7 '23
28-51
19*33
19-33
7 '94
15-40
23'59
1 8 '45
30'12
26-69
26-69
3
5'17
5'53
5'53
5 '44
6'02
5-58
5-66
5'59
5 -60
5 '54
5-6,
5 '43
5-46
477
5'52
5'52
5'5'
5-58
5'55
5 '53
5'59
5 '60
6-81
-,'61
4-65
5-62
5'5"
5-66
5 -60
SS
5-64
5-62
5-61
3-21
6-14
4'53
5 -,8
5-64
5'47
5 '5 2
5 '47
5 -60
5 '47
5'S 1
5'S 1
5 '43
5 '49
5 '52
5 '49
5'56
5 '59
5'67 i
574
5'52
4 '94
5-62
5 69
5 '57
5 '54
5'56
5'83
67O
s
5'53
5'53
5 '44
5'59
5'7
5 *6o
5-61
5 '55
5-62
5 '44
5 '47
5'52
5'5'
5-58
5'55
5'53
5'59
5 -60
5 : 6z
5'5'
5-66
5-60
5'65
5-64
5*
5-61
...
5 '47
5'52
5 '47
5-^0
5 '47
5'5'
5'S 1
5 '49
5 '52
5 '49
5'56
5*59
5'67
574
5-62
5-69
5'57
5 '54
5'56
o Androiuedae
IVizzi IX 37 S P
Peffasi
1902 September
Cephei 51 S P
56 Pegasi
iwich.
Piazzi IX. 37 S.P
Gepliei 51 S.P
16 Pe"asi
X Urs.c Miuoris
t Pe ff asi
ir 1 Pegasi
5"S
5-52
5-48
5-48
5'5
5'53
5'5'
5 '47
5-62
5-61
574
5 '60
5-6,
575
5'59
5-60
5-68
5-6,
Green
5-62
5-62
5 -6i
5 '57
5-60
5'65
5^5
5-66
5-60
Green
5 '-6,
5'67
5-68
5-66
577
5-68
57
5-60
573
5-64
5 '47
5-42
5-48
5-56
5'38
5 '47
5 '47
5 '44
ir 2 Pegasi
Piazzi XXII. 36
i Lacertse , .. ..
Bradley 1399 S P. . .
Y CvflTU .
Bradley 2993
Groombridge 3804
Groombridge 1119 S.P
16 Cv^ni .
\ Pegasi
p Pe^'asi
v Cveui ...
56 Pegasi ...
Bradley 2701
AQ Gvpi ..
<* Cvirni...
i Andromi'dae
T Cvgni
78 Pegasi
Lund. 10053
1902 September 23
72 Cvcni... , W
wich.
74 Cygni
w
w
w
w
w
\v
w
B
24
\v
B
E
W
\v
\v
w
w
w
E
W
W
w
w
w
vr
E
K
B
B
B
K
K
V:
[:
75 Cygni
Piazzi XXII 36
77 Cvinii ...
< Pe rf asi
Bradley 2851
Bradley 2852
14. Pe^asi .,
Bradley 2993
wich.
Pifiz/i IX 37 S P
1902 September
Cephei 51 S.P
Cephei 51 S.P
10 Lacertse
\ Ursse Minoris
X Ursiu Miuojis
\ Pegasi
15 Cygni
v Cygui
77 Cvgni
Bradley i <;o8 S P
25 Cy^'ni
Groomiiridge 11198. P
GroonibviJge 1119 S.P
20 Vulpeculae
Pegasi
56 Pegasi
9 AndromediB
21 Vulpeculse
24 Vulpeculae
16 CvsJ'ii
Groombridge 3140
7 Cygui
75 Draconis
78 Pe"asi
56 Cy ff ni
32 Vulpeculse
v Cygui
C Cygui
A 1 d
Piazzi XXI. i
Bradley 1672 S P
t Cy<nii...
Bradley 1672 S P
T Cygui
a Cveni
27G
TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Star's Name.
Position.
No. of Wires.
R A.
Micrometer.
Observed
Transit.
Corrected
Transit.
*3 a***i
5 S,^
Clock
Apparently
Slow.
l|||
Star's Name.
Position.
No. ot Wires.
B.A.
Micrometer.
Observed
Transit.
Corrected
Transit.
Tabular
Apparent
B.A.
Clock
Apparently
Slow.
titd
11*1
ain
=<
1902 September
\ Ursae Minoris
25
w
E
E
E
E
E
E
E
E
E
W
E
IO
IO
9
9
9
9
9
9
9
IO
9
8
r
10-350
"'437
10-440
j)
it
10-861
11*229
10*440
h m s
19. 19. 47-68
19. 19. 42 52
19. 29. 4-89
19. 31. 54*51
'9- 34- 27-12
19. 37. 12*15
19. 47. 2*88
19. 49. 15*15
19. 56. 16*88
20. o. 19*15
20. O. 15*63
20. 14. 4"; '8 I
s
43*81
40-54
479
54-41
27*01
12*04
15*05
16*77
20*82
19-05
4-; -70
8
4576
IO*48
17*64
8-37
20*73
22-43
24*36
24-36
a *--2
S
'95
5-22
5*69
5-62
5 -60
5 -60
5-68
5-66
3'54
5'3'
62
Greet
s
5*69
5*62
5-53
5*60
5-60
5*68
5-66
"I -62
iwich.
Grooinbridoe 3140
E
E
W
W
"W
W
W
\V
W
w
w
\v
w
9
9
9
9
ii
9
9
9
9
ii
9
5
9
r
10*440
j >
10*440
10-456
10*440
j >
ll '928
i o "440
14-274
h in s
20. 16. 39-66
20. 1 8. 40*17
20. 21. 18-17
20. 23. 54-00
20. 33. o 77
20. 37. 2-24
20. 41. 34-71
20. 43- 33-17
20. 46. 3372
2O. 49. 42'! I
20. 53. 28-94
21. I. 19-83
21. 23. i '66
39-55
40*06
1 8*08
0-73
2'IO
34^8
33-02
33]57
28*79
19-68
2-07
s
45*12
45-66
2377
59-50
5-68
7-81
40-26
38-73
39-35
25-41
7-54
3
5'57
5 -60
5-69
5*6,
4'95
57'
5*68
5-71
578
573
5'73
5 '47
8
5*60
5-69
5-6,
57'
5-68
57'
573
Lalande 39329
8 Cygni
9 Cy^m
14 G\'rni ..
19 Cygni
52 Cyni... .
13 Vulpeculaj
Groombridge 1119 S.P.
Groombridtfe 1119 S.P..
76 Draconis . ....
76 Cygni...
Piazzi IX 37 S.P.
1902 September 26.
Greenwich.
\ Ursai Minoris
W
IO
q'427
19 19. 42*74
76*01
44.'2C
7*74
Bradley 2993
W
IO
II '851
22. 21 22*59
21*28
38 Pegasi
W
9
10 '440
22. 2$. 31 "21
31 "14
76-84
c '70
F
M'
4*82
F
w
"
Groom bridge 2889
F,
5 5 1
r ?6
\\
' '
5 L
CO*
i^Cygui
F,
12*28
w
ij Cvgni
F
"
"W
ill "87
<*6z
25 Cygni
E
o
w
>-;2'6i
Groombridge 1119 S.P
K
10
IO*67-3
20. o. i8'86
22'<7
25*68
7*1 "*,
u Pegasi...
w
q
22. 45. I4'8l
H'77
20*77
w
11
? C 'AC
Groombridge 11198.?
W
10
II'42I
20. o. 16*76
22 'J 8
25-68
3'5
o Andromedse
V.
o
22. 58. 23 "47
27 '47
2q '06
C'67
20 Vulpeculse
F,
C'<8
E
CQ'8?
<'6z
21 Vulpeculse
F,
o
E
1878
<*6i
*v Cye*ni ...
F,
Q
I* 1
B
8
* '
23. 13. 43*27
43*23
48*82
c - cq
Lalande 39329
W
I 8 '02
Ii
"
51*28
5-66
40 Cygni
W
<7'82
c*66
()!
E
r-62
42 Cv'iii...
W
r*6c
S
28 *5 1
c'c6
49 Cygni
W
7*80
1
?*A8
A. Cygni
W
l8 '72
c'6-i
c*6i
56 Cv^ni
W
-62
?'6i
"W
I4'28
d.'8 c
76 Draconis
W
I I '714
41*28
:>
r-gc
Bradley 1672 S P
W
26-64
v Cygni
W
20 53 28*88
28'8o
Groombridge 3750
W
q
22. 17. 77*77
77'6c
47*74
;'6q
c'6q
Bradley 1672 S.P....
B
IO
8'702
0. 14. I7'7Q
20 'o--;
26-64
6'Cq
1902 October 6.
Groombridge 1119 S.P
Paris.
Groombridge 1119.,
X Cygni
5 6 Cygni
76 Draconis
v Cygni
{Cygni
fCygm
v Cygni
tr Cygni
Piazzi IX. 37 S.P.
2 Pegasi
1902 October 7.
74 Cygni
Bradley 2841
14 Pcgaai
16 Pegasi
i Pegasi
irj Pegasi
T . 2 Pegasi
Piazzi XXII.
i Lacertse
Bradley 1 3998. P.,
36..
Bradley 2993.
38 Pegasi
IO
9*092
IO
13-037
9
10*440
6
IO
ii '306
9
10-440
9
u
9
5
9
M
10
IO*68o
5
10*440
10*440
10*960
20. I. 7-75
20. i. 10*08
20 -43- 35'54
20.46. 35-96
20. 49. 38 '56
20. 53. 31-21
21. I. 22*OO
21. 8. 46*28
21. IO. 53*03
21. 13. 34-23
21. 23. IIT5
21. 25. 31-17
21.33. 1*77
21. 39. 1071
21. 45. 31-26
21.48. 36-94
22. 2.27-79
22. 4. 53-86
22. 5. 38-91
22. 19. 41-13
22. II. 42*58
22. 15. 25'6o
36*63
35 - 4'
35-98
42-52
31-17
22*02
46*06
52-93
34-16
6*31
30*86
37'54
37^4
38-52
39-10
45-70
34-29
25*18
49-21
56-05
37-3I
8-92
33'97
9-894 22. 21. 15-34
10-440 [22. 25. 33-89
'77
475
10-72
13-69
31*09
34*1 5
36-71
39'77
27-55
30 '6 1
53'74
56-83
3879
41 'Si
41*10
44-18
42-53
45 '67
18*28
20*97
23H5
25*08
33'79
3 6 '74
4-99
0*91
3-11
3-12
3-18
3-12
3-16
3 - '5
3-12
3 - '5
2-61
3'"
2-98
2-97
3-06
3*06
3-06
3-09
3-02
3-08
3-14
2-69
1-63
2-95
3 10
3-11
3-11
3 -I 5
3''4
3' Ll
3-I4
3-10
72 Cygni W
77 Cygni W
Piazzi XXI. 339 .
Piazzi XXII. 36..
i L;icertse
Piazzi XXII. 65..
Bradley 2993
38 Pegasi
13 Lacerte
A. Pegasi
10*440
21. 30. 46*80 46*71
21.38.26*82 26*78
10*440 21. 51. 49*96
22. 9. 41-16
22. II. 42-73
22. I 4 . 39-29
9-691
10-440
49-65
41-14
42-67
39' 2 3
22. 21. I4'79 I 22*78
22. 25. 33*83
22. 39. 44*26
22. 41.49*72
336*
44'28
49'44
49-83
29^5
52-70
44-I8
45-68
42*27
25*26
3 6 '75
47-36
Paris.
2*96
2*96
3*05
3-05
3*05
3*08
3-01
3 - 7
3*13
2- 94
Groombridge 3804 .
8 Laeertse
p. Pegasi
15 Lacertie
Groombridge 3919 .
56 Pegasi
6 Andromedie
K Andromedse
i| Andromedse
Bradley 3147
Bradley 3147.
E
9
E
9
E
9
E
9
E
9
K
9
E
9
E
9
E
9
E
10
W
IO
10 440
8'6io
9-168
22. 28.
7-46
22.31.
31*77
22.45.
I7-57
22. 47.
38-07
22- 59-
38-53
23. 2.
21 '67
23. 5.
56*87
23. 35'
3 6 '39
23. 41.
12*23
23. 28.
4'5 Z
23. 28.
3-88
7*50
31 *8o
'7'35
38*18
38-58
21*47
56-98
36-52
12*41
15-72
14-50
10*43
34-68
20-31
41-05
41*52
24*34
59-84
39'49
'5"39
1 8 '09
18*09
3 12
3-17
3-05
3*04
3-01
3-04
2-48
3-07
3-08
3-11
2-93
2*88
2*96
2-87
2-94
2*87
2*86
2 97
2*98
2-37
3'59
STAR-TRANSITS OBSERVED BY MR DYSON WITH TRANSIT B., AND RESULTING CLOCK ERRORS.
277
Star's Name.
Observed
Transit.
a; ~
Star's Name.
* B
42
Observed
Transit.
jfiH
ir
11)02 October 7 continued.
Paris.
Groombridge 4159
85 Pegasi
B-adlcy 3112
a Andromedffi
22 Andromeda?..
10-440
23. 49.
23. 52.
23. 57.
o. i.
o- 3-
o. 5.
7 '97
47'4'
4-67
33-14
20-84
15-46
8-00
47-20
4 '49
32-99
20-69
'5-63
5''3
7 '45
35-96
23-63
18-49
2-98
2-93
2-96
2'97
2-94
2-86
2-98
2-93
2-96
2-97
2-94
2-86
Bradley 1672 S.P.
Bradley 1672 S.P..
28 Andromedae ....
TT Andromedie ....
S Andromedie ....
8-919
13-510
10-440
h m 8
o- '3-45'55
o. 13. 46-91
o. 24. 58-61
o. 31.40-35
o. 33. 676
23 '6o 27-02
26-03
58-44
40-24
6 '60
26-69
1-51
43^5
9-70
3 '4*
0-66
3'7
3-11
3-10
1902 October 8.
Paris.
\ Pegasi
/* 1'egasi
15 Lacertae
Groombridge 3919.
8 Pi-gasi
56 Pegasi
9 Andromeda
r Pegasi
67 I'egaai
13 Andromedse
E
E
K
E
F.
E
K
E
K
R
10-440
22. 4'- 49'95
22. 45. 17*78
22.47. 38-55
22. 49. 38*93
22. 59. 2*88
2. 21*86
13. 46-19
15. 48-84
4-64
23. 22. 25-92
IJ.
*3-
23-
23. 20.
j 49 "6 1
' i7'45
2-58
21-54
46-05
48-50
4-38
2579
20-30
41-04
41-51
5-41
2 4'33
48-76
51-24
7-i9
28-46
2-92
2-85
2-61
2 74
2-83
2-79
2-71
274
2-81
2-67
2-91
2-84
2 "60
2'73
2-82
2-78
2-70
2-73
2-80
2-66
Bradley 3147.
Bradley 3147 ...
K Andromeda...
78 Pegasi
if/ Andromedie...
Lalande 47034..
a Andromed* .
23 Andromeda .
9-271
8-623
10-440
23. 28. 8-31
28. 8-61
35.36-81
39- 5H2
12-72
3
23
23. 41
23. 54. 31-64
O. 3. 21*21
o. 8.27-58
15-31
15-03
36-65
5'10
12-59
31-36
20-89
'7'95
'7'95
39-48
7 '94
15-38
34''3
23-63
30-17
2-64
2-92
2-83
2-84
2-79
* '77
274
2-79
1902 October 9.
Paris.
44 Cygni E
47 Cygni E
75 Draconis E
52 Cygni E
X Cyxiii E
56 Cvgni E
{ Oygni E
PiazziXXI. i E
( Cygni E
r Cygni E
Groombridge 3548 ...; E
10-440 20. 27. 16-41
20. 30. 5-99
!O'2l8 20. 34. 21-76
10-440 j 20 41. 3775
20. 43. 36-07
20. 46. 36-66
21. I. 22-72
21. 4 . 30-43
21. 8. 46-84
,; in. 9.53-69
12-116 I 21. 19. 10-45
16 *io
5-66
2377
37-38
3576
36-45
22-51
30-05
46 '46
53-40
16-86
18-73
8 '34
26-18
40-01
38-46
39-03
25-11
32-63
49''5
55-99
2-63
2-68
2-41
2-63
2-70
2-58
2-60
2-58
2-69
2'59
3'35
2-60
2-65
2 '60
2-67
2'55
2 '57
2'55
2-66
2-56
72Cygni
74 Cygni
75 Cygni
14 Pegasi
16 Pegasi
Groombridge 3655.
< Pegasi
T! Pegasi
ir. 2 Pegasi
10-400
21. 30. 47-47
21.33. 2-40
21. 36. 21-48
21. 45. 31 '88
21. 48- 37'S 1
21. 59. 0-76
22. 2. 28-39
22. 4. 54-58
22. 5. 39-64
47''4
2-09
21-21
3 ''47
37-06
0-51
27-95
54-20
39-26
4977
4'7
23-82
34-12
3974
3''4
30-58
56-80
41-78
2-63
2-62
2-61
2-65
2-68
:*3
2-63
2 "60
1902 October 10.
Paris.
76 Draconis
Piazzi XXI. i ......
C Cygni ...............
T Cygni ...............
a Cygni ..............
Groombridge 3548.
Groombridge 3548.
Piazzi IX. 37 S.P..
72 Cygni .............
74 Cygni .............
75 Cygni ......... ....
Bradley 2841 ........
Bradley 2851 ........
16 Pi-gasi ............
Piazzi XXII. 36....
i L-ieertae ...........
Bradley 1399 S.P.
Bradley 2993.
8 Licertae .. .
10 Lacertae...
12 Lacertae .. .
8*124
10-440
9
9
9
9
10 12-170
12*593
775'
10*440
9
9
9
5
4
9
9
10-999
20. 49. 41-11 42-90
21. I. 22-92 2272
21. 4. 30-57 30-25
21. 8. 47-08 46-77
21. 10. 53-85 53-59
21. 13. 35-04 34-80
21. 19. 12-79 17-61
21. 19.
21. 23.
21. 30.
21. 33.
21. 36.
21. 39.
21. 41.
21. 48.
22. 9.
22. II.
22. 15.
I2-O3
9-58
47-62
2-50
21-58
u 39
3i '43
3778
42 "06
43'54
23-51
12-777 22. 21. '8-45
10-440 I 22. 21. 32-52
.. 22 -34-53 '71
,, 22. 37. 7-32
17*41
673
47-32
2'3*
II *2I
31-11
41-87
43'33
19-29
45-09
25-09 j
32-62 I
49-14 '
55-97 i
37' 2 3
19-86
I
19*86
9'5'
49'75
4-69
23-80
13-63
33-48
39'73
21-51
22-03 24-47
32-28 34-64
53-46 55-79
7-08 9-42
2-19
2 '37
z'37
2-37
2-38
2-43
2-25
2-45
2-78
2-43
2-37
2'37
2-42
2'37
2-27
2-26
2-29
2'22
2-33
2'34
2'35
2'35
*'35
2-36
2-41
2-41
2'35
2-35
2*40
2-35
2-25
2-25
2-28
2-35
2-32
2'33
1 3 Lacertae
K Pegasi
fj. Pegasi
Groombridge 3919.
6 Andromedse
W.B. (2) XXIII. 95.
6 1 Pegasi
9 Andromedie
T Pegasi
14 Andromeda! .
Bradley 3147....
i Andromedaj...
K Andromeda;..
78 Pegasi
if- Andromedse
W.B. (2) XXIII. 907..
i(/ Pegasi
Lalande 47034
85 Pegasi
Bradley 1672 S.P
Bradley 1672 S.P. ,
W
w
W
w
E
E
K
E
K
K
K
E
K
E
W
W
W
w
w
w
10-440
10-440
II 760
10-440
10-440
10-500
8723
22. 39. 45-16
22. 41. 50-55
22.45. 18-27
22.49. 39-41
57'67
20-72
1-18
46-63
49-25
44'94
50-18
17-91
39''7
57'52
20-43
o-S8
46-46
48-92
30-36
!5-3
22-03
37'24
23
23. 26. 30-56
23. 28. 9-40
23- 33- 22-19
23- 35- 37-38
23 39- 5'92
23.41. 13-12 12-95
23-44.47'59 47'26
23. 52. 48-16 ; 47 "
23- 54- 32-09
23.57. 5-42
3 -"79
5-08
o. 13. 36-03 125-45
o. 13- 37'4 T 25-76
47 '3 '
52-51
20-28
41-48
59-81
2278
3-21
4874
51-23
32-61
17-62
24-31
39'47
7-93
<5'37
49-64
50*12
34-12
7'44
2 7'43
2 '37
2'33
2-37
2-29
2-35
2'33
2-28
2-31
2-25
2-59
2-28
2-23
2-30
2-42
2-38
2-31
2'33
2-36
1-98
1-67
1902 October 13.
Paris.
56 Cygni...
32 VuTpeoulee
* Cygni
f Cygni
C Cygni
(T Cygni
Lund 10053
Groombridge 3548..
Piazzi IX. 37 S.P..
2 Pe-jasi
74 Cygni
10-440
10-159
9-661
10-440
20. 46. 36-95
2O. 50. 24-23
20. 53. 32-22 |
21. 1. 23-03
21. 8. 47-26
21. I 3 . 35-27
21. 15. 29-18
21. I 9 . 978
21. 23. 11-14
21. 25. 32*04
21. 33. 2*71
36-89
23'97
32-12
22-97
47-02
35'H
29-04
1676
783
31*71
2-55
26-00
34-I3
25-02
49 '08
37-16
3'93
1879
9'97
33-86
4-63
2-04
2-03
2"OI
2-05
2"o6
2'02
1-89
2-03
2-I 4
2-15
2'08
2 03
2"OO
2*04
2-01
1-88
2-07
75 Cygni
77 Cygni
Bradley 2841.
Bradley 2851.
Bradley 2852.
14 Pegasi
1 6 Pegasi
i Pegasi
ir 1 Pegasi
15radley 2993.
10*440
5-297
21. 36.
21. 38.
21. 39.
21. 41
21. 41.
21.45
21. 48.
22. 2.
22. 4. 54*87
22. 5. 39*84
22. 21. 17-05
21-83
27-94
ii*6S
31 '62
32-23
37-80
28-71
2171
2779
11*37
31*31
57-61
31-96
37-49
28-39
54-62
39'59
21 "90
2373
29-81
'3'57
33'44
5973
34-05
39-69
30-53
56-74
4173
23-82
2 'O2
2 - O2
2 '2O
2-13
2'12
2*09
2 "2O
2-14
2-12
2-14
l- 9 2
2*OI
2'OI
2-19
2-12
2'II
2-08
2-I 9
2-13
2'II
2-13
GREENWICH OBSERVATIONS, 1902.
2 n
2-78
TELEGRAPHIC DETERMINATION OP LONGITUDE, PARIS-GREENWICH, MADE IN 1902..
Star's Name.
Observed
Transit.
1 IIH
ill
I
I!!!
iStar's Name.
< 5
42
Observed
Tnuisit.
.S z~
IS .
=*
1902 October 14.
Paris..
32 Vulpeculfe.
v Cygni
I Cygni
Piazzi XXL i
C Cygni
"Cygni
Lund 10053
Groombridge 3548.
Groom bridge 3548.
Piazzi IX. 37 S.P..,
7* Cygni
74Cygni
75 Cygni
77 Cygni.
Bradley 2841 ,
16 Pegasi ,
Piazzi XXI. 339
Piazzi XXII. 36
i Lacertae
Bradley 1399 S.P...
Bradley 2993
12 Lacertae
13 Lacertae
fi. Pegasi
GrooTii bridge 3919..
i o '440
1 1 '124
i3' 2 53
5715
10-440
10*709
10-429
10-440
20. .50. 24-25
20. 53. 32-24
21. I. 23-00
21. 4. 30-76
21. 8. 47-21
21. 13. 35-26
21. 15. 28-93
21. 19. 9-44
21. 19.
21.23.
21. 30.
21. 33.
21. 36.
21. 38.
21. 39.
21. 4 8.
21. 51.
22. 9 .
22. II.
22. 15.
IO-29
11-25
4778
2-66
21-82
27-93
11-65
37-86
50-92
42-25
43-67
25-09
22. 21. 15-94
22. 37.
24-08
32-21
23 01
30*61
47-06
35'2I
28-86
16-36
1777
7-69
47 7 6
2-67
21-87
2 7'95
11-67
3770
50-71
42-25
43 '65
19-70
21-, 5
7 '44
25-98
34-11
24-99
3 2 '54
49 "06
37"'4
30-91
1 8 -43
18-43
IO'I2
49-68
4'6l
2371
29-79
'3'55
39' 6 7
52-59
44'07
45'5 6
22-28
23-61
9'37
7-43
22. 39. 45*26 45-29
22. 45. 18-43 ' 18-25 2O'24
22. 49. 39-44 : 39 -45 41-44
1-90
1-90
1-98
1*93
2'OO
'"93
2-05
2-07
0-66
2-43
92
'94
84
84
88
'97
88
82
'91
2-58
2-46
1-93
i -96
'99
1-99
1*88
1*88
1*96
1*91
1*98
1*91
2*03
1-90
1-92
1-82
1-82
1-86
1 '95
1-86
1*1
1*90
1-92
''95
1-98
1-98
o Andromeda;...
Pegasi
56 Pugasi
6 Andromeda;.. .
T Pegasi
67 Pegasi
1 3 Androniedie .
Bradley 3147....
Bradley 3147
i Andromedse
K Andronied-s
78 Pegasi
Groombridge 4153-
Groombridge 4159.,
<j/ Pegasi
j.alande 47034
a Andromedse
22 Andromeda",
23 Androniedie
Bradley 1672 S.P..
Bradley 1672 S.P. .
IT Andromedse..
5 Andromedre. .
Piazzi 148....
10 '440
8-093
9-390
10-440
22. 57. 26-93
59- 3 55
23. 2. 22*48
23. 5. 57-88
23- 1 5- 49 44
23. 20. 5-36
23. 22. 26-56
23- 28. 7-73
23. 28. 6-74
23- 33- 22-27
23- 35- 37'42
23. 39. 6-07
23. 46. 4O'2o
23.49. 8-92
23. 52. 48-29
32-22
21-75
16*40
,, I o. 8. 28-22
9-520 o. 13. 42-65
26-97
3'4'
212-31
57 '94
49-26
5-26
26-6:
'5'53
13-96
22-27
3 7 '44
5-91
40-18
8-87
48-09
32-11
21-59
16-45
28-19
10-440 ; 0.31.41-48 41-36
- 33- 7'8i 7'&7
o. 36. 26-67 26*46
28-90
5-36
24-28
5977
51-20
7 15
28-41 ,
16-88
16-88
24-28
39 '44 |
7-91 '
42-15
10-95
5O'I2
34-11
23-62
18-48
30*16
28-24
9-610 I o. 13.42-79 27-44 28-24
43-36
9-71
28-53
1-93
1-95
''97
''83
1-94
i 89
i 'So
1
35
2-92
2'0l
2"OO
2 '00
''97
2-08
2-03
2'OO
2-03
2-03
''97
-0-13
0'8o
2'OO
2-0 4
2 '07
92
'94
96
82
'93
2'01
2'OO
2*OO
''97
2-08
2-03
2'OO
2-03
2*03
''97
2*00
2 '04
2*07
1902 October 15.
Piazzi XXII. 36...
i Lacertse
Bradley 1399 S.P.
10-440
10-245
22. 2. 28-97
22. 5. 40*33
22. 9.42-37
22. II. 44 '06
22. 15. 25-41
28-72
40-16
42-29
43 '95
20-17
4 '"7 !
44-05
45'55
22 46
178
''54
1-76
i -60
2-29
'77
'"53
'75
'59
Paris.
Bradley 2993.
10 Lacerta? .
1 3 Laeerte .
\ Pega-si ....
fa Pegasi
12-712
10-440
22. 21. l6'o6
22. 34. 54-I7
22. 39. 45-74
-
54-08
4.5-68
22. 42. 50-99' 50-73 3 . ^
22. 45. 1873 i 18-48 20-23
23-42
5573
47-24
-46
2-48
,65
,- 5 6
'"73
J'75
l-6 4
""55
73
i"74
1902 October 16.
Paris.
Groombridge 4153 .
Groombridge 4159
1(1 Pegasi
Bradley 1672 S.P. .
Bradley 1672 S.P. .
v Andromedae
W.B. (2)0. 1172.
H Andromed-B
2 Ursse Minoris.
39 Andromedse .
ft Andromedse ..,
T Piscium
<f> Piscium
Piazzi I. 29
v Piscium
J Andromedae...
47 Andromedae .
Polaris
Polaris .
\V
10-440
(1
7'934
11-175
10*440
8-294
10-440
8-997
10-691
23. 46. 40-54
23. 49. 9-36
23. 52.48-67
o. 13. 41-48
o. 13. 40-88
o. 44. 27-76
0.48. 8*38
o. 51. 21*97
0.55. 39*64
0. 57. 27*17
1. 4. 17*83
6. 18*82
8. 28*63
10. 54*n
14. 7*81
16.37*76
18. 7*50
24. 49*95
i. 24. 48*64
40-59
9'37
48-53
27-63
25-96
2779
8-36
21-97
45-36
27*26
17-83
18-76
28-52
54-09
7-72
37'9
7 '54
10-93
8-06
42-I5
10-94
50 II
28-58
28-58
29-46
IO-07
23-67
46-89
28-83
19-46
20-39
3-'5
557i
9-36
39-5i
9-18
1-56
'S7
1-58
0-95
2/62
'67
7'
70
'53
"57
63
63
64
60
64
0-28
1-56
'57
i- 5 8
Bonn 1434....
Lalande 3149
Piazzi I. 170 .
A Arietis
e Trianguli
a Arietis
6 Trianguli
7 Trianguli
W.B. (2)11. 270-1.
Piazzi II. 61
ii Trianguli
Lalande 4588
W.B. (2)11. 581....
33 Arietis '.
35 Arieti.s
W.B. (2)11. 915.
41 Arietis
20 Persei
Cephei 47
10 '440
10-440
10-440
11-227
1. 35. 52-69
1. 38. 17-55
1. 42. 55-39
1. 52. 31-13
1. 57. 17-62
2. I. 4 I '91
2. 6. 44-25
2. II. 32-55
2. 14. 23-79
2. 16. 47-86
2. 21. 42-57
2. 24. 26'O5
2. 27. 0-84
2- 35- '54
2. 37-45'"
2. 40. 58-36
2. 44. 15-95
2. 47. 34-98
2. 53. I4-12
52-79
17-52
55 '43
31-01
17-56
41-76
44'"7
3 2 '49
23-70
47-90
42-50
25-99
0-79
0-45
45 '3
58'37
15 -87
3 5 '3
16-15
54-34
19-12
56-92
19*28
43H3
45-86
34-18
25-49
49-59
44'25
27-78
2'54
2-06
46-70
59-98
17-54
36-66
17-73
'55
60
'49
56
72
'67
69
-69
79
69
'75
79
75
6 1
67
-fa
'67
63
58
1-56
1-61
1-50
""57
i"73
1-68
1-70
1-70
i -80
1-70
1-76
i -80
1-76
1-62
1-68
1-62
1-68
1*64
1902 October 17.
Paris.
{Cygni
Piazzi XXI.
f Cygni .
T Gyt
Uygm
Piazzi IX. 37 S.P. ,
7^ Cygni
74 Cygni
75 Cygui
77 Cygni
Bradley 2841
1 6 Pegasi.
10*440
6-303
10-440
10 440
21. I. 23*19
21. 4. 31*01
21. 8.47*48
21. IO. 54-23
21. 23. 12*50
21. 30. 48*06
21. 33. 2-89
21. 36. 21 -95
21. 38. 28-13
21. 39. 11-83
21. 48. 38*09
23-39
31 '01
47-48
54-34
877
48-18
3-04
22'14
28-29
38-02
24-92
32-49
49-01
55'83
10-53
49-62
4-55
23-65
2973
'3 '49
39-63
'53
48
'53
'49
76
'44
'5i
'5 1
'44
'5'
1-61
'5'
46
V
'47
'43
'5
'5
'43
'5
i -60
Leiden 9262
Groombridge 3655 .
i Pegasi
ir 1 Pegasi
ir 2 Pegasi
Bradley 2993
38 Pegasi
Groombridge 3804 .
8 Lacerfce
10 Lacertffi
12 LaeertiC
13 Lacerte
10*440
9-547
10*440
21. 56.
21. 59.
22. 2.
22. 4.
22. 5.
22. 21.
22.25.
22. 28,
22. 31.
22. 34-
22. 37.
22. 39.
10-30
I'33
29-07
55-18
4O-II
14-83
35'4
8-68
32-96
54'5
7-65
45 '54
10-31
1-49
28-99
55''9
40-12
20-65
35-04
877
33'4
54-13
7-74
45-66
11-89
2-99
3'47
56-68
41-67
23-04
36-61
10-29
34'54
55-70
9'33
47-21
,-58
1-50
1-48
1-49
''55
2-39
'57
1-52
1-50
'J7
''59
''55
'"57
1-49
''47
.-48
''54
1*56
1*51
"'49
1-56
,-58
''54
STAR-TRANSITS OBSERVED BY MR DYSON WITH TRANSIT B., AND RESULTING CLOCK ERRORS.
279
Star's Name.
Observed
Transit.
II
3
o It"
8 jj O
5 S.v3
E
Star's Name.
Observed
Transit.
Ill
O ftM
1902 October 17 continued.
\ Pegasi
o Androniedte...
Pegasi
56 Pegasi
13 Andromedse .
Bradley 3147....
Bradley 3147
i Andromeda?
78 Pegasi
i| Pegasi
Lai-Hide 47034
85 Pegasi
Groombridge 4219 .
1902 October 21.
Piazzi XXI. i
T Cygin ...............
a Cj-gni ..............
Piazzi IX. 37 S.P.
72 Cygni ............ ,
74 Cygni .............
75 Cygni .............
77 Cygni .............
14 Pegasi
1 6 Pegnsi
Groombridge 3655 .
i Pegasi
T 1 Pegasi
T 2 Pegasi
Piazzi XXII. 65....
Bradley 1399 S.P. .
Bradley 2993
1902 October 22.
( Cygni W
T Cygni W
$ Andromedse W
2 Ursx Miuoris W
41 AndromediB W
P AmlroniediB W
T Piscium W
Piscium I W
Piazzi I. 29 W
v Piscium W
Polaris... .. W
Polaris
Piazzi I. 104...,
v Aiidromedse .
X Andromedae.
Bonn 1434 ,
Bradley 253 ...,
A Arii-tis
1902 October 25.
78 Pegasi...
t Andromedae
/.B. (2) XXI 1 1. 907..
ifi Pegasi
85 Peg
\V
W
W
W
W
Piazzi 0. 74 .
Piazzi 0. 103...
ir Andromeda?.
W
\v
W 1
9
Groombridge 4219 j W 9
Bradley 1672 S.P W 10
10*440
12-548
12*040
10*440
22. 41. 50-95
22. 57. 27-24
22. 59. 3*84
23. 2. 22*8o
2-!. 22. 26-67
23. 28. 5*95
23.28. 8*02
2 3 . 33. 22*60
23.39. 6-44
23- 52. 48*72
2 3* 54- 32 5-
23- 57- 5 '94
50-85
27*36
379
22-72
26-80
13-96
16-61
2279
6-43
48-67
32-61
5'9'
J~ J I J 7^ J ~J -
23. 59. 37.63! 37-80
28-87
5'34
24-26
28-39
16-41
16-41
24-26
7-90
50 "I I
34 10
7H3
39' 2 5
10*440
6 881
10*440
4- 3 1 '54 3''5-
8. 47*96 47-93
9- 547 547 s
13. 35-96 36*06
23.13*61, 979
! 48*93
5574
13-469
10-348
10-440
9-041
10-440
11-541
10-674
10-440
36-99
11*13
21.30.48*49 48*561 49*54
2 '- 33- 3'44 3'55 ! 4'46
21. 36. 22*52 22*68 j 23*y6
29-65
j 21. 38. 28-67
21.45. 33-05
21. 48. 38*65
21. 59. 1*83
22. 2. 29-58
22. 4. 55*65
22. 5. 40*65
22. 14.41-05
22. 15. 28*41
28-79
32-99
3^54
1-96
29-46
55-62
40*62
41-07
22-95
22. 21. 1472 21-02
33'92
39-56
2-91
30-41
56-61
41-60
42-04
23-56
22'2I
21. 8.48-00
21. 10. 5472
0.34. 8- 9 8
0. 55. 40-43
1. 2.27-41
I. 4. 18-57
i. 6. 19-49
i. 8.29-32
i. 10. 54-81
i. 14. 8-49
i. 24. 49-88
i. 24.47-76
i. 28. 41 '08
1.31. 6-79
i. 33. 32-63
' 35- 53'42
i. 50. 10-70
i. 52. 3174
10-440 ! 23. 39. 3-35
,, i 23. 41. 10-30
,. 23.44.44-95
.. j 23. 52.45'69
23. 57. 2-95
.. 1*3- 59- 34 - 55
12-584 o. 13. 46-93
10-440 0.22.57-77
o. 27. 38-82
o. 31. 38-77
47-99
54-80
8-98
46-41
27-63
.8-66
19-48
29-25
5 + " 8 4
8-45
11-62
1 1 '06
41-20
6-97
32-86
53-62
10-82
31-69
2-89
10*14
44-59
45-17
2-46
34'3
26-40
57-56
3 f 3 !
38-38
42-13
7-85
33-65
54^9
1 1 "69
32-62
>'59
1-51
'55
''54
'"59
-O'2O
'"47
''47
1-44
1-49
1-52
'"45
0*90
I'OO
0-96
0-93
'"34
0-98
0*91
0-98
0-86
0-93
I "02
0-95
0-95
0-99
0-98
0-97
o'6i
1-19
0-92
0*92
0-73
0-47
0-83
0-82
"93
0-92
0-90
0-94
0-41
0-97
0-93
0-88
0-79
077
0-87
0-93
Pans.
r- 5 S
1-50
1-5-4
'53
'59
i'47
'"47
1-44
1-49
,1-52
I- 45
Bradley 3212 ,
23 Andromedse
ir Audromedie
8 Andromi'dse
Bradley 1672 S.P.
Bradley 1672 S.P.
Groombridge 140 .
v Andromedae
W.B. (2)0. 1172..
fi Androrned*
2 Ursse Miuoris....
2 Ursre Miuoris E 10
*i 9
E Q
E| 9
E 9
E ! 10
W; 10
W| 9
W 9
Pans.
0-89
0-99
0-95
0*92
0-97
0*90
0-97
0-85
0*92
I '01
0-94
0-94
0-98
0-97
0*96
38 Pegasi
Groombridge 3804
8 Licert-9
56 Pega-d
6 Andromedse
Bradley 3147
i Andromeda
$ Pegasi
Lilande 47034
Groombridge 4219 ,.
Bradley 3212
a Andromedse
22 Atidromedse >
p AndromediB ....
Gt"Oonibridge 57 ,
Piazzi 0. 74
28 Andromedae ..
8 AndromediB....
v AndromediB ....
/i Andromedae ...
Paris.
0*92
0*92
73
0-83
0-82
0-93
0*92
0*90
0-94
0-93
0-88
0-79
77
0-87
0-93
6 Triauguli ....
y Triauguli
W.B. (2)270-1.
Piazzi II. 61
ii Triangtili ....
Lalande 4588 ...
W.B. (2)11. 581
33 Arietis
35
K
B
i-;
E
E
I
B
< Arietis ... ... E
W.B. ( 2 )II. 915 W
41 Arietis W
20 Persei W
Cephei 47 |W
p Persei.
3 Pers.*i....
55 ArietU .
56 Arietis.
W
W
W
W
Jroombridga 2283 S.P | W, 10
Greenwich.
10-440
11-197
11-382
10-440
12-392
I2'22O
10-440
12-285
I I -440
[ I -440
10-440
10-361
8-592
10-440
1 1 '640
h m s
o. I. 34-48
o. S. 28-50
o. 31.4179
o. 34. 8'2i
o. 13. 4273
- '3- 43 '43
o. 40. 48 *6 1
o. 44. 27 '60
o. 48. 8*40
O. 51. 22"O2
55- 3874
o. 55. 39-20
22. 25,
22. 28.
22. 31.
23. 3.
23. 5,
23. 28,
23* 33-
23. 52,
23- 54
23. 59
o. i.
o. 3.
- 5
35-62
9-22
33-48
Z3-37
58-62
679
18-08
45-06
28-60
32*20
30*75
18-41
11*99
o. 16. 5*94
o. 19. 1-43
o.,23. 674
o. 25. 4-89
o. 34. 13*18
o. 44. 28-48
o. 51. 22*70
34-47
28-65
41-83
8*22
26-21
27-98
4877
2774
8-45
22*09
44-72
45-62
9-27
33-53
23*25
5873
14-88
23-27
49-05
33"4
38-28
34'9*
22*48
'7 '47
1*31
56-42
1-72
'57
8*83
28-60
22-78
2. 6. 44-49 44-85
2. ii. 32-78 33*21
2. 14. 24-31 24-67
2. I 6. 48*24
48-80
43-40
2. 21. 43*01
2. 24. 26*57 j 27*00
2. 27. 1*28 \ 1*71
2-35- '94 ''26
2. 37- 45 '59 45^2
2. 40. 59-38 59-07
2. 44. 17*03 16*66
2.47. 36-06; 3577
2. 53. 14-67 : 16-81
>-s. 57-93 58-02
5 '75
3.46*87
6. 27*69
7- 5 2 '4
51-87
46-85
27-65
41 *oo
35-94
3'-5
43'37
9*72
28-72
28-72
5"33
29-46
10-07
23*67
46-90
46*90
3 6 '55
10*22
34-48
24-22
59*68
'574
24*22
50-09
34*08
39-22
35-92
23-60
18-44
2-19
57-40
2*58
1*51
971
29-46
23*67
45*92
34-25
25-56
49-68
44 '3 3
27-86
2-63
2-15
46*79
0-08
17-63
3676
1 8*08
59"5
52-88
47-82
28*62
''47
1-50
-'54
1*50
2*51
074
1*56
1*72
1*62
1*58
2*18
1-28
0*96
0-95
0-95
0-97
0-95
0-86
0-95
1-04
i "04
0*94
I'OO
1*02
0*97
0-88
0-98
0-86
0*94
0-88
0*86
0-89
1*07
1-04
0-89
0-88
0*93
0-86
0*92
0-89
0-87
i -oi
0-97
0*99
f7
1-03
I'OI
0*97
0*97
''57
October 21. The R.A. Micrometer was inadvertently left at ii r '440 from ( Andromedae to 8 Andromedfe.
October 22. The R.A. Micrometer was inadvertently left at io r *36i from 6 Triangnli to 20 Persei.
i'47
1*50
i '54
1*50
1*56
172
1*62
1*58
0*94
0*94
0-97
0-95
0-95
1-04
1-04
0-94
I'OO
I*O2
0*97
0-88
0-98
0*86
o-94'
0*88
0*86
0-89
''07.
1*04
0*89
0*88
0*93
0-86
0*92
0-89
0*87
I "01
0*97
0-99
i-oj
1*01
0*97
0*97
7-84
4-95
4'Q---;
W
9
10*440
o. 40. 45*58
45-36
5'32
4*96
4*96
15-25
5*11
TII
W
q
o. 44. 2476
24-49
29'45
4*96
4-96
49-55
4-96
4*96
Lnnd 350
W
q
o. 48. 5-47
S'*4
10*07
4-93
4 '93
50-06
4-89
4*80
W
9
o. 51. 19-05
18-74
23-68
4'94
4-94
7-40
4*94
W
7
13*266
o. 55. 32-97
4'35
46-66
6*31
39-19
30-67
4-89
4' 2 7
4*8 9
2 Ursfe Minoris
F,
7
15*415
o. 55. 35*01
42-83
46-91
4*08
2 '57
5 'ot
< "OI
F,
<1
10*440
'. 2- 23'77
23-60
28-47
4*87
4-87
43-29
4*94
4 '94
F,
q
I. 4. 14*99
14-66
19-49
4*83
4-83
43*35
4*97
4-07
T Piscium
F.
q
I. 6. 15-95
i5'53
20-42
4-89
4*89
280
TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Star's Name.
Observed
Transit.
il
-
Star's Name.
s
0>
< B
Observed
Transit.
-- U
o -
1902 October 26'.
Greenwich.
Bradley 1672 S.P W
Piazzi 0. 74
ir Andromedae
8 Andromedae ,
Piazzi 0. 148
Groombridge 140
Bonn 654
o. 13. 46-56
0. 22. 57-97
o. 31. 38-94
0.34. 5-36
o. 36. 24-23
o. 40. 4 5 '8 1
o-43- 5 2 '75
25-84
57-69
38-47
4-85
23-63
45 '54
52-40
31-02
2-56
43^5
9-70
28-53
50-32
57'3'
5 -,8
4-87
4-88
4-85
4-90
4-78
4-91
4-87
4-88
4-85
4-90
4 ' 7 8
4-91
v Andromedse...
Lund 350
fi Andromedse. .
2 Ursse Minoris..
41 Andromedse..
ft Andromedae...
10-440
9-908
10*440
o. 44. 24-92
o. 48. 5*61
o. 51. 19-18
0. 55. 33-87 41-67
1. 2. 24-02 23-77
I. 4. 15-16! 1475
24'57
5'i9
18-78
29-45
10*07
23-68
46-59
28*47
19*49
4 *8S
4*88
4*90
4*92
4*70
4'74
4-88
4-88
4-90
4-70
4-70
1902 October 27.
Greenwich.
85 Pegasi
a Andromedse...
22 Andromedse..
Piazzi 0. 74
Andromedae ...
J Andromedse ...
2 Ursse Minoris..
39 Andromedae..
41 Andromedae..
j8 Andromedae....
T Piscium
<t> Piscium
Piscium W
10-440
8-237
10-440
10*440
2 3- 57- 3'34
o. 3. 19*41
o. 5. 14*12
o. 23. 58*30
o. 31. 39-16
o- 34- 5'4 8
o. 55. 34*89
0. 57. 24*38
1. 2. 23*98
I. 4. 15*15
i. 6. 16*14
i. 8.25*97
i. 8. 5*13
2-76
18-86
13*87
58-01
38*68
4'95
42-40
24*03
23*68
14*70
15*60
25*36
4'5 2
7'39
2 3'57
18*40
2*56
43'35
9*70
46*52
28*86
28-47
19-49
20*42
30*18
9*41
4*63
47'
4'53
4'55
4-67
475
4*12
4*83
479
479
4*82
4-82
4-89
4-63
471
4'53
4'55
4-67
475
4-83
479
479
4*82
4*82
47 Andromedae W
Polaris... .. W
Polaris .
50 Andromedae. .
X Andromedse ..,
a Trianguli
Lund 870
\ Arietis
a Arietis
Trianguli
6 Trianguli
y Trianguli
10*440
11*713
10*237
10-440
i. 18. 4-79
i. 24. 36-30
i. 24.41*53
1-31-
i. 33.
i. 47.
i. 50.
1. 52.
2. I.
2 - 3-
2. 6.
2. II.
3'3i
29-01
30*13
20*67
28*34
39*19
43'3i
41 '64
29*95
4'33
3 '49
10*28
2-92
28-68
29*56
20*21
27*69
38-53
42*81
41 "08
29-44
9' 2 3 !
11-44
11*44
33-68
34*46
25*17
32*66
43'53
4775
45 '97
34'3
4-90
7'95
1*16
4'95
5*00
4*90
4*96
4 '97
5-00
4 '94
4*89
4*86
4*90
1902 October 29.
Greenwich.
Groombridge 3548 .
74Cygni
75 Cygni
77 Cygni
16 Pegasi
Groombridge 3655.
i Pegasi
* Pegasi
w 2 Pegasi
Piazzi XXII. 36 ...
i Lacertse
Bradley 1399 S.P..
Bradley 2993
38 Pegasi
Groombridge 3804.
8 Lacertae
10 Lacertse
12 Lacerbe
13 Lacertse
\ Pegasi
fi Pegasi
T Pegasi
Bradley 3147
7'i39
10*440
9*790
7*83,
10*440
8*740
21. iS.
21. 3 2.
21. 36.
21. 38.
21. 48.
21. 58.
22. 2.
22. 4 .
22. 5.
22. 9 .
22. I I.
22. I 5 .
22. 21.
22. 2 5 .
22. 28.
^^. 31.
22. 34 .
22. 37.
22. 39.
22. 41.
22. 45.
23. I 5 .
23. 2 7 .
58*27
59' 6 7
18*71
24*94
35''4
58*06
2 5'95
52*04
37-07
39''7
40*82
28*56
7 '41
32*02
5 '5
29*90
50*99
4*62
42*49
48*08
15*88
46*81
59'35
18*45
24*63
34^7
57'83
25*38
5' '59
36*62
38-83
40-44
20-39
15-77
31-59
5-21
29*60
50*68
4'33
42*24
47-5I
15*32
46-24
9'3'
12*95
4*29
2 3'38
29-48
39'43
2*73
30*29
5 6 '47
41*48
4379
45 3
2 5'34
20*22
3 6 '43
10*08
34 '34
55'5'
9-13
47-01
52*29
20*06
51-07
'379
4*07
4-94
4'93
4-85
4-86
4*90
4*91
4-88
4*86
4-96
4-86
4 '45
4-84
4*87
474
4-83
4-80
477
4-78
474
4-83
4-48
4 '94
4'93
4-85
4-86
4-90
4*91
4-88
4-86
4-96
4-86
4 *S 4
4-87
4'74
4*83
4-80
477
4*78
474
4-83
Bradley 3147 W
i Audromedse
K Andromedae
78 Pegasi
W.B. (2) XXIII. 907,
ty Pegasi
Lalande 47034
85 Pegasi
o Andr-omedfB
22 Andromeiise
23 Andromedfe
Bradley 1672 S.P
Bradley 1672 S.P.
28 Andromeda
ir Andromedse
S Andromeclse
W.B. (2) 0. 1172.
H Andromedse
2 Ursse Minuris...
39 Andromedae
41 Andromedse
\V
w
\v
w
\v
\v
w
w
w
Andromedae ! W
9*072
10*440
11*682
11-182
10*440
12*131
10*440
2 3* 2 7- 5 8 '34
2 3- 33* '9'54
2 3- 35* 34'5 8
2 3- 39- 3'4i
23. 44. 45 '3
2 3- 5 2 - 4574
2 3- 54- 2 9'53
2 3- 57- 2 '99
o. 3. 19-19
o. 5. 1373
o. 8.25-54
o. 13. 54"oo
o. 13.
o. 24.
o. 31.
o. 34
o. 48,
o. 51.
o. 55
0. 57.
1. 2
i- 4
49-55
57*12
38*89
5' 2 4
5*60
19*08
32*82
24*36
2 3'93
'4'95
9-42
19*32
34-38
2*93
44-54
45-19
29*12
2 '47
18-70
13*58
25*27
30*22
26*84
56-61
38-44
475
5-22
18-72
40*97
24*06
23*69
14-53
"379
2 4'-3
39-29
7*81
49'5i
5'3
34*02
7'37
2 3'5 6
18-38
30*07
3''94
3i'94
1*48
43'34
9*69
1 0*06
23*67
46*40
28*85
28*47
19*49
4*8 1
4*91
4*88
4'97
4-84
4*90
4-90
4-86
4-80
4-80
1-72
5-10
4-87
4*90
4'94
4*84
4-95
5 '43
4'79
4*78
4*96
1902 October 30.
Greenwich.
Piazzi IX. 37 S.P .,
72 Cygni
74 Cygni
75 Cygni
77 Cygni
16 Pegasi
Piazzi XXI. 339 ...
Groorabridge 3655.
t Pegasi
ir 1 Pegasi
r 2 Pegasi
Piazzi XXII. 36 ..,
i Lacertse....
Bradley 1399 S.P..
Bradley 2993
Bradley 2993 .
8 Lacertse
10 Lacertae ....
5'594
10-440
10-440
ii
8-817
7-045
IO"2o8
10-440
21. 23. 13*17
21. 31.44*94
21. 32. 59*77
21. 36. 18*85
21. 38. 25*04
21.48. 35-19
21. 51. 48*24
21. 58. 58-22
22. 2. 26*06
22. 4. 52-16
22 - 5- 37-I3
22. 9. 39*45
22. II. 41*07
22. 15. 28-01
22.21. 7-75
22. 21. 7*78
22. 31. 29*98
22. 34. 51-15
7*82
44'55
59'4 2
18*56
24*70
34-61
47'59
57 '96
2 5 '47
51-68
36*65
39*09
40-67
20*45
15*32
14-92
2 9'5'
50-72
I 2 '60
49'35
4-26
23*36
29*45
39-4I
5 2 "35
2*71
30-27
56*46
41-56
4377
45-28
25-64
20'00
20-00
34-33
55-5
4-78
4-80
4-84
4-80
475
4-80
476
475
4-80
4-78
4-91
4-68
4-61
5''9
4*68
5*08
4-76
4-78
479
4-83
479
474
479-
475
474
4-80
4*78
4*91
4-68
4'6i
4*76
4*78
12 Lacertae.
13 Lacertae
\ Pegasi
H Pegasi
T Pegasi
67 Pegasi
13 Andromedse
14 Andromedae
Bradley 3147
78 Pegasi
(/ Andromedae
t|i Pegasi
Lalande 47034
85 Pegasi
Groombridge 4219.
Bradley 3212
a Andromedas...
22 Andromeda!
Bradley 1672 S.P.
W
W
\\-
w
w
\v
w
w
\v
\v
\v
w
\v
w
\v
\v
w
wi
E '10
10*440
9*036
10*4^0
8-161
22. 37.
22. 39.
22. 41.
22. 45.
2 3- '5-
23. 20.
23. 22.
23. 26.
23. 2 7 .
23. 39.
23. 41.
23. 52.
23. 54.
23. 57-
2 3* 59-
o. i.
o. 3.
o. 5.
o. 1 3, 48 '10
475
4 2 '57
48-17
15-91
46-85
2-71
2 375
28-02
57 '69
3'56
io'6o
4578
29*66
3-11
3475
3''55
19-26
4-36
42*21
47'5 2
15-28
46-21
2-19
23*41
27*61
7*70
2 '99
10*33
45'-5
29*15
2*51
34'39
30*98
18-69
13-48
26*21
9*12
47*00
52*28
20*05
51*06
7*00
28-23
32*42
3-58
7*80
15*19
50*03
34-01
7 '37
39''5
35'S7
2 J'55
18*37
32*22
4-76
479
4-76
477
4-85
4-81
4-82
4-81
5-88
4-8,
4-86
4-88
4-86
4-86
476
4-89
4-86
4-89
6*01
STAR-TRANSITS OBSERVED BY MR DYSON WITH TRANSIT B., AND RESULTING CLOCK ERRORS.
281
Star's Name.
Observed
Transit.
A u .
=<
Star's Name.
- j .=
Observed "o'* = ^
Transit.
ss
-2 | B
1902 November 1.
i Lacertse
Bradley 1399 S.P..
Bradley 2993
Bradley 2993
38 Pegasi
Groombridge 3804.
8 LftOtrtB
10 Lacerte
12 Lacert'e
13 Lacertse
1902 November 2.
Grooiubridge 3548..
Piazzi IX. 37 S.P.
75 Cygni
77 Cygm
14 Pegasi
16 Pegasi
Piazzi XXI. 339 ....
Groombriilge 3655.,
i Pegasi
T, Pegasi
jr., Pe,asi
E 10
1902 November 3.
14 Pegasi ...
i Pegasi
ir l Hegasi
ir 2 Pegasi
i Lacertse
Bradley 1399 S.P.
Bradley 2993 i W j 10
Bradley 2993 E
10 Lacertoe . . . , E
1902 November 4.
Bradley 1399 S.P. .
\ Pegasi ..............
15 Lacertae ..........
Groombridge 3919..
Bradley 1508 S.P.
o Andromedse ........
Pegasi ............
56 Pegasi .............
6 Amlrornedae....
W.B. (2) XXIII. 95..
61 Pegasi
9 Andromeda!
T Pegasi
67 Pegasi
13 Andromedse
14 Andromedae
Bradley 3147
Bradley 3147.
ic Andromedse
78 Pegasi
i^ Andromedae
85 Pegasi
Groombridge 4219.,
Bradley 3212
a Andromedae
23 Andromedte
Bradley 1672 S.P..
10 '440 j 22. II. 40-98 40-51
8-895 j 22. 15. 28-38 21-52
6-519
10*369
10-440
22.21. 775
22. 21. IO'O2
22.25. 32-17
22.28. 5'75
22. 31. 29-98
22. 34. 51-18
22. 37. 4'8o
I4-53
16-37
31-62
5'3 2
29-54
5'73
4'37
22. 39. 42-62 42'22
11-399 21. 18. 55-24
14-452
10*440
21. 23.
21. 36.
21. 38.
21. 45.
21. 48.
21. 51.
21. 58.
22. 2.
22. 4.
22. 5.
14*19
18-83
25 '06
29-55
35*26
48-24
58-21
26 'i i
52-18
i o '44 o
10-030
11-463
13-655
10-440
14-164
10-440
11-876
10-440
10*440
10-817
7-487
10*440
10-890
21.45. 297
22. 2. 26-12
22. 4. 52-27
22. 5. 37-18
22. 11.41 '00
22. 15. 30*37
22. 21. 7*98
22. 21. 6*67
22. 33. 51-17
22. 15. 29*90
22. 41. 48-25
22. 45. 15-98
22. 47. 36-38
22. 49. 36*97
22.52. 5*84
22. 57. 24-35
22.59. I-0 5
23. 2. 2O-O5
23. 6. 55-22
23. 8. 18-57
2 3- '3- 59-07
23- '3- 44'37
23. 15.47-11
2 3 . 20. 2-93
23. 22. 24-00
23. 26. 28-34
23. 2 7 . 57*41
2 3 . 2 7 .
2 3- 35-
23. 39.
23. 41.
23- 57-
23* 59-
o. i.
o. 3.
o. 8.
o. 13.
57' 2 3
34*92
10*85
3 '37
34'94
3' '94
25-84
7-29
8*20
18-51
24-71
28-99
34-63
47-54
57-95
25-47
51-67
29-20
25'55
51*82
3673
40*62
23-58
15*03
14-15
50-82
22*45
47-61
'5'35
36*05
36-58
2-05
24-00
0-47
19-44
18-04
5 8' 5 2
44*05
46*50
2 '44
23-70
17-97
7-09
3-22
10-62
2-81
34-62
31-40
19-03
25-50
28-96
25-96
19-54
-9"54
36-38
10-03
34^9
55M6
9-08
46*96
50
"OI
36*64 ; 41
*3
40
'40
33-69
30*22
56-38
41-38
45-21
26-41
19-04
19-04
55'4 2
26-65
52-22
19-99
.0-62
41 "12
6-66
28-59
5''3
24-06
59*46
22-52
2*96
48*44
51*00
6-94
28-16
32-36
12-37
12-37
39-22
775
15-12
7'33
39-10
35-83
23-51
30-02
33-83
474
4'44
5-01
4-76
47'
475
4-73
4'7i
474
4-21
4-81
476
4-68
4-72
473
476
4-69
476
473
4-76
4H9
4'67
4-56
4-65
4'59
2*83
4-01
4-89
4-60
4-20
4'6i
4-64
4'57
4'54
4-61
4'59
4-66
4*62
4-57
4 * 4 8
4 '44
4'39
4-50
4*50
4H6
4'39
4-52
5-28
4'57
4-53
4-50
4-52
4-48
4'43
4-48
4'5*
4-87
Greenwich.
4-74
476
4-71
475
473
47"
474
A Pegasi | W
/i Pegasi W
3 Pegasi | E
56 Pegasi E
E
Peg*
67 Pegasi
13 Andromedae .
14 Andromedae.
Bradley 3147 ...
i Andromedae ...
c Andromedae ..
Greenwich.
476
4-68
4-72
47 2
4-76
4*69
4-76
473
476
Bradley 1399 S P..
\V
E
B
E
10 Lacertae ..I E
Bradley 2993.
38 Pegasi
8 Lacei'tas....
1 2 Lace tse .
13 Lacertae .
X Pegasi
p. Pegasi
o Andromedae.
Greenwich.
4-48
4*66
4-55
4-64
4-58
4-59
13 Lacertae E
A Pegasi E
,u Pegasi E
o Andromedae .
jS Pegasi
56 Pegasi
T Pegasi
i Andromedae .
K Andromedae .
W 9
W| 9
w! 9
W| 8
W
\v
Greenwich.
4 *6 1
4-64
4'57
4'59
4-66
4-62
4-57
4-48
4'44
4'39
4-50
4-50
4-46
4-39
4'57
4-53
4-50
4 52
448
4-43
4-48
4-52
Bradley 1672 S.P.
Groombridge 57...
Piazzi 74
28 Andromedae ....
K Andromeda*
S Andromedae
Groombridge 140..
v Andromedae
Lund 350..
\Y
\V
\V
\V
W
W
w
w
w
Amiromedae j W
2 Ursae Minoris.... .. W
2 Urste Minoris E
41 Androtnedse j E
E
B
Andromedae
T Piscium
Piscium ' E
Piazzi I. 29 1 E
v Piscium < E
{ Andromedae E
47 Andromedae E
Polaris... . E
Polaris W 10
Piazzi I. 104 W 9
v Andromedie | W 9
X Andromedae W 9
Bonn 1434 W 9
oTrianguli W 9
Lund 870 W 9
\Arietis W| 9
9 10*440 22. 41. 48*19
9 ,, 22. 45. 15*96
10-440 22. 59. I -Ol
23. 2. 20*05
23- '5- 47-04
23. 20. 2*88
23. 22. 23-99
23. 26. 28-27
I1-332 23.27.57-7!
10-440 23. 33. 19-84
23- 35- 34-9
I2'206 22. 15. 30-55
22. 21. 5-54
10-440 22. 25. 32-06
22. 31. 29-95
22. 34. 51-06
22. 37. 4-69
22. 39. 42*61
22. 41. 48*19
22. 45. 15-94
22. 57. 24*27
10*440 [ 22. 38. 42-73
22. 41. 48-23
22. 45- '5"9 8
10*440
22. 57. 24*28
22. 59. 0-99
23. 2. 19-97
23. 15. 46-94
23. 33. 19-67
2 3 . 35. 34-81
11-576
10*390
10-173
13-641
10-440
9-426
10-351
10-440
10*440
o. 13.
o. 17.
o. 23.
0.25.
o. 31.
o. 34.
o. 45.
o. 47.
o. 48.
o. 51.
o. 55.
4974
53-3 1
58-53
5772
39'49
46-23
25-44
6-19
19-72
33-86
o- 55- 3475
I. 2. 24*24
I. 4. 15-42
i. 6. 16-46
i. 8. 26-28
i. 10. 51-83
i. 14. 5-49
i. 16. 35-35
i. 18. 5-17
i. 24. 37*62
47-54
15-32
0-44
' 9 '45
46*42
2-37
23-65
27-87
7*22
19-51
21-66
'4'55
31-58
29-61
50-71
4*36
42*32
47-55
15-32
23-99
47*64
15-40
*3"95
0-43
19*38
46-32
19*36
34-52
52-26
20-03
26-18
19*30
36-36
34-27
55-44
9*06
46-94
52-24
20 -oi
28*62
4 6 9 2
52*23
20*00
28*61
5-I4
24*07
51 *oi
24-07
5274 57'3 2
57*96 i 2*50
56-94 1*45
43 '3'
9*67
50*28
29*42
10-05
23 65
46-26
38-79
5*09
4572
24*81
5"5 2
19*06
41*10
42*43
23*96
14*99
15-94
25*68
51-36
4-93
35'"
477
6-97
i. 24. 39*08 | 6*87
i. 28. 38*06 37*61
i. 31. 3*67 3-30
i- 33- 2 9'45 29-13
i. 35. 50*15 49-80
'47- 3'53
I. 50. 21 '05
I. 52. 28-78
20*6o
,28-14
46-26
28-45
19-48
20-42
30-l8
5574
9-41
39-56
9*24
10*71
10-71
42-17
7-89
337
54-44
34-49
2 5 21
32-69
472
47"
+'73
4*65
4*62
4*6 1
4'55
4'53
5 '9 2
4'59
4'6;
4-52
475
4*78
4*66
4-73
4-70
4-62
4-69
4-69
4-63
4 '49
4'59
4'6o
4-66
47'
4-69
4-69
47'
47'
4*60
4-58
4'54
4-51
4'5-s
4-58
4'56
4*61
4^3
4'59
5*16
4'49
4'49
4*48
4*50
4-38
4*48
4'45
4'47
374
3*84
4-56
4 59
4-57
4*64
4-5 2
4-6,
4'55
s
4-72
4'73
4-65
4-62
4 "6 1
4'55
4'53
4'59
4-67
4*78
4-66
473
4-70
4-62
4-69
4-69
4*63
4-48
4-58
4"6o
4*66
47'
4*69
4*68
47'
47'
4-58
4'54
4'5'
4'5-i
4-58
4-56
4 -6 1
4'53
4 '59
4"49
4 '49
4*48
4-50
4-38
4-48
4'45
4'47
4'57
4 "60
4-58
4-65
4-53
4-62
4-56
November 4. The R.A. Micrometer was inadvertently left at lo'^o from Groombridge 57 to , u Andromedse.
STAR-TRANSITS OBSERVED BY MR HOLLIS WITH TRANSIT C.,
AND
RESULTING CLOCK ERRORS.
Star's Name.
Observed
Transit.
ia*
H -!
ifi
.
->*.:/:
Star's Name.
Observed
Transit.
IM
^r
8 | *
1902 March 17.
A. Ursse Minoris S.P.
A Ursse Minoris S.P W
6 Cancri W
^ Cancri W
J 2 Caucri ! W
15 Cancri
X Cancri
d>' Cancri
W
W
w
Caucri |W
Bradley 2701 S.P E
i Cancri E
p l Cancri E
io Ursse Majoris E
v Cam-ri j E
Piazzi VIII. 245 E
{ Cancri E
36 Lyncis I E
1902 March 19.
A Ursffi Minoris S.P E
\ Ursoe Miuoris S.P. .
A Ursse Minoris S.P. .
v Geminoruni
o Geminorum
K Geminorum
TT Geminorum
Geminorum
85 Geminorum
ai 1 Cancri
6 Cancri
Groombridge 1119 ....
Groom bridge 1119 ,
X Cancri
31 Lyncis
0' Cancri
K 2 Cancri
Piazzi VIII. 245 ...
{ Cani'ri
36 Lyncis
19 Ursse Majoris ...
38 Lyncis
a Lyncis
1902 March 20.
A Ursa; Minoris S.P.
A Ursie Minoris S.P. .
K Geminoruni
eo 1 Cancri
W
10-315
I2'IO7
10*080
10^456
io'o8o
10-914
10-349
11-589
10*080
9-923
11-253
10*080
10-019
10*080
h in s
7- >9- 3 Z '59
7. 19. 21*56
7. 56.44*74
8. 2. 14*52
8- 4-4775
S. 7. 19*29
8. 14. 21*59
8. 20. 44*96
8.23. 3-09
8. 33. 9-97
8. 41. i "10
8. 47. o'8o
8. 54. 32*08
8. 57. 15*60
9. o. 33*07
9. 3. 58*60
9- 7- 39'7
50. 1 1*08
55- H'47
57-44-35
o. ''36
7- '9- 59^4
7.19-59-95
7-3- 7'' 5
7-33- '39
7.38.46*15
7. 41. 25*60
7- 47- 44'4
8. o. 53*08
8. 14. 21*20
8. 16.22*26
8.20.44-77
8.23. 2-75
9. o. 32*48
9. 3.58*18
9- 7- 38-49
9. 9.28*07
9. 12. 59-48
9. 15. 19-80
7. 20. 5'22
7. 20. 6-46
7.38.46-30
7. 55. 14-60
35*03 25*49
22*85
43'9i
13*70
46*92
18*46
20*76
44'' 3
2-26
9'53
0-24
59^4
31-21
'474
3 2 '20
5776
38-20
7 . 20. 3 -IO | 38-43
34-I2
34-I3
6-90
O*22
45*88
2 5'42
44-I5
10-77
14-21
! 44-1 1
16-80
15-46
20-92
22-18
.44-50
I 2 '44
38-41
27-88
59'3'
19-60
37-62
40*01
45'99
14-30
2 5 '49
32-26
2-07
35' 2 7
6-82
9-03
3 2 '53
50-51
56-89
48*51
48*10
19*48
2*98
20*47
45'94
26*50
2 7'49
27*49
55"'7
48*43
34*02
13*58
58*85
2*32
32*23
3*38
9*00
10*25
32*50
50*48
45*92
26*47
15*96
28-59
28-59
34-01
2-31
Greenwich.
9'54
11-65
1 1 "62
11-65
11-64
11*73
11*60
11*75
12*64
1173
11*84
11-73
11-76
"73
11*82
11*70
-i 1-67
-i 1*64
-i 1*67
-i 1*66
-11-75
-11*62
-11*77
-11*74
-11*85
-11*74
-"77
-11*74
-11*83
-11*71
38 Lyncis
Groombriilge 3548 S.P..
16 Leonis Minoris
54 Leonis
47 Ursae Majoris
51 Ursse Majoris
Bradley 3147 S.P
Bradley 3147 S.P
92 Leonis
Virginis
Groombriilge 1830
Groombridge 1841
67 Ursa? Majoris
Piazzi XII. 3
4 Coin's
2 Canum Venaticum.,
Bradley 1672
Bradley 1672
E
E
K
E
E
E
E
w
W
w
W 9
w; 9
w; 9
Wj 8
W| 8
W io
W io
Greenwich.
27*49 10*94
6-63
6-64
11-73
11-79
n-86
11-84
32-20 111*95
11-92
-n-88
-13-42
12*08
1 1*92
11*93
12*00
11*96
20*44 i 11*89
11-95
11-94
11*92
11-90
11*89
7-71 i
-11*76
-11*82
-11*88
-11*86
-11*97
-11*94
-11*91
-11*90
-1.1-94
-11*95
-12*02
-11*98
-Il-gl
-H'97
-11-96
-11-94
-11-92
Groombridfje 3548 S.P.
16 Leonis Minoris
fj. Leonis
19 Leonis Minoris
20 Leonis Minoris
21 Leonis Minoris
Piazzi IX. 254
22 Lonis Minoris
Bradley 1399
Bradley 1399
Bradley 2993 S.P
Bradley 2993 S.P
33 Leonis Minoris
35 Leonis Miuoris
37 Leonis Minoris
42 Leonis Minoris
44 Leonis Miuoris
46 Leonis Minoris
54 Leonis Minoris
47 Ursie Majoris
51 Ursse Majoris
Bradley 3147 S.P
Bradley 3147 S.P
.|E
IE
. K
. E
JE
' E
E
E
E
\v
\v
W
\v
W
W
w
w
\v
\v
w
w
Greenwich.
1 1 -42
11*98
11*99
12*01
I 2*O2
Groombridge 1119..
15 Caucri
31 Lyncis
59 Cancri
io Ursas Majoris
E i 10
E 9
io'o8o
6 '533
10*080
13-259
10-511
io'o8o
10-135
57/6
io'o8o
8-360
11-966
9-802
12-260
10*080
7794
10-702
10-225
10*080
h m s
9. 12.59-96
9- '9- 7"'5
9.44. 28-11
10. 50. 3 3 "6 8
10. 54. 14-04
10.59. "9'59
11. 27. 46-42
11.27.
11.35.
11. 40.
11.47.
11.52.
11.57.
12. 6.
12. 7.
12. II.
12.15.
12. 15.
43-63
56-32
28-84
35-18
27-42
23-61
2-34
7-80
28-02
2-86
9. 19. 16-76
9-44-VS3
9.47.26-17
9.51.5570
9- 55- 3 6 '49
10. 1.53-81
10. 5. 19-22
10. 9.43-44
10. 15. 46-86
10. 15. 47-35
10. 21.
IO. 21.
IO. 26.
10. 30.
10. 33.
10. 40.
10. 44.
10. 48.
io. 50.
10. 54.
io. 59.
11.27.
11.27.
16-43
16-18
32-25
5874
27-12
39-69
45'35
4-59
33-20
1 3 '4
18-99
56-03
54-92
47 '44
56-09
5-48
59-09
7'3>
27-24
32*82 j 21-05
13-17 1-47
18-72 7-08
46-62 ! 34-25
4 3 '47
55'5
28-02
34-34
26-58
2277
1-51
6-97
27-18
0-84
3-00
9*02
27-40
25-88
55"59
36-27
53-62
19-10
43-21
51-03
51-52
IO"I2
9-87
32*06
58-60
26-93
39-48
45'H
4>2
32-93
13-31
18-87
47-63
46-52
s
-1 1*65
-11*22
-Il*76
-11*77
-11*70
- 1 1 '64
-12*37
- 9'22
62
'5*
74
"78
84
'54
11-62
n-66
11-30
49'54 I '3'46
43-88
16-50
22*6o
14-80
i'93
49'97
55^5
15-52
49^4
8. 0.47*12 i -."13
8. 7. 19*03 18*78
8. l6. 22*27 22*20
8. 51. 8*60 i 8-39
8-54- 3'"55 S'4*
56-48
15-46
13-96
43-76
24-32
141-68
7' 2 7
3I-34
4o'oi
40*01
58-42
58-42
2O"2I
4675
14-98
27-59
33-20
52-58
2I-05
i '47
7 '08
34-26
34*26
2-46
678
10-23
56-29
19-44
-12-54
-11-94
-11-92
-11-83
-11-95
-11-9+
-11-83
-11-87
-ii "02
-11-51
-11-70
-11-45
-11-85
-11-85
-11-95
-11*89
-i i '9 1
-11*84
-11*88
-11*84
-11*79
-i3 - 37
-12*26
8-67
12*00
11-97
12'1O
I2'O2
-11-67
11-77
11-77
1170
11-64
-11-62
-11-52
-11-74
- 1 1 -78
-11-84
-11-54
-11-62
-ii '66
-11-95
-11-93
-11-84
-11-96
-11-95
-11-84
-H-88
-11-86
-H-86
-n'96
-i 1*90
-11-92
-11-85
-11-89
-11-85
-"'79
1 2 "03
I2'OO
I2*O5
STAR-TBANSITS OBSERVED BY MR HOLLIS WITH TRANSIT C., AND RESULTING CLOCK ERRORS.
283
Star's Nume.
< s
osS
Observed
Transit.
Star's Name.
Ohgerred
Transit.
"I*
= ss
5
L902 March 20 continued.
v Cain-ri .
19 Ursfe Majoris W
38 Lyncis W
a Lyncis I W
Groombriilgc 3548 S.P W
A Leonis W
10 Leonis Minoris W
9 Leonis W
13 Leonis , W
f Leonis ... .. W
1902 March 21.
\ Ursa: Minoris S.P
A Ursie Minoris S.P. .
Groombridge 1119 ....
X Ciincri
31 Lyncis
0j Cancri
Groombridge 1450 ....
Bradley 2701 S.P
Pi Caucri
59 Cancri
v Cancri
Piazzi IX. 37
1902 March 22.
X Ursa; Minoris S.P. .. ... W
A. Ursse Minoris S. P. '.,
ir Geminonvm
Geininorum
85 Geminorum
oi 1 Cancri
Groombridge 1119
if/2 Cancri
15 Cancri
X Cancri
PJ Cancri
59 Cancri
10 Ursis Majoris .
v Cancri
Piazzi VIII. 245.
Cancri
36 Lyncis
1902 March 23.
Groombriilge 1119 W
X Cancri j W
31 Lyncis "W
0j Caneri j W
u 2 Cancri i W
Bradley 2701 S.P ! W
59 Cancri.
10 Ursas Majoris.
v Cancri
Piazzi VIII. 245
1902 March 25.
\ Ursse Minoris S. P E
A Ursa; Minoris S.P ; W
Gemiuorum E
85 Gemiiiorura.... I E
to ) Cancri .
6 Cancri
Groombridge 1119.
15 Cancri
X Cancri
1 1
io'o8o 8.57.15*41
10*080
11*329
10*080
9*918
io ; ii*597
9 io*o2O
9 | 10*080
9
9 i.
9
io 10*681
7 10*080
10*080
9*117
10*713
7*964
10*080
10*194
10*080
8*123
10*080
13*900
10*080
10*294
10*837
10*080
10-728
10-080
9. 9.28-15
9. 12. 59*66
9. 15. 19*93
9. 19. 17*04
9.26.22*57
9. 28. 28*01
9. 32. 28*30
9- 36. 15-04
9. 40. 32-18
5-10 i 2-95 | 12-15
27-99 15-95
59-53 47-40
19-76 7-70
8-41 56-69
22-28
27-87
28-03
'478
31*90
I0'22
15*84
>5'93
75
19*79
12*04
12-13
I2'o6
11-72
I2'o6
12*03
12-03
7.20.23-52 45-75 29-74 16*01
7- 20. 19'54
8. 0.40*12
8. 14. 21*40
8. 16. 22*41
8. 20. 45*00
8.26.47-61
8. 33. 14-29
8.47. 0*41
8.51. 8-68
8. 57. 15-47
9.23.25-51
7. 20. 26-64
7. 20. 30-81
7. 41. 26-16
7.47.45-02
7. 50. 11*86
7.55. 15*26
8. o. 25*70
8. 4.48*25
8. 7. 19*70
8. 14. 21*98
8.47. 0-8 1
8. 51. 9*00
8. 54.31*94
8.57.15*89
9. 0.33*10
9. 3.58*81
9. 7.38*89
8. o. 35-63
8. 14. 21-85
8. 16. 22*75
8. 20.45*40
8. 23. 3*40
8. 33. 16-49
8.51. 9*05
8. 54. 32*00
8.57.15-88
9. 0.33-11
7. 20. 41-63
7. 2O. 36-92
7- 47- 45'5 1
7- 5- !2'25
7.55. 15*67
7.57.45-5-
8. o. 23*99
8. 7. 19-95
8. 14. 22*16
40*62
15-69
21-15
22-45
44-76
47-55
9-37
o'i8
8-53
15-15
37'53
42-85
25-78
44'5 '
11*23
14*72
9*21
477 1
19*24
21*47
0*36
8*64
3-79
'5-36
32*87
58*24
3.878
19-16
21-39
22-65
44*96
2*89
10*30
8-71
31-87
32-89
29-74
i"47
.8-97
IO"2I
32*47
35-32
57^9
48-05
56-28
2'94
30*97
30-97
13*52
32-15
58-80
2-27
0-41
35"i9
6*74
8*95
48*03
56*26
19*40
2*92
20*39
45'89
26*42
59-30
8-94
10-17
32-44
50-42
57-55
56-25
19-38
2*91
20-38
47-13 34-86
41-27
44-90
11-51
'5 "P3
44-92
13*40
19-41
21-56
34-86
32*10
5875
2"22
32-I3
57-00
6-69
8-90
Greenwich.
12-17
12*06
12*15
12*08
12*08
12*05
I2'I2
12'05
12-13
1 6 Leonis Minoris .
fi Leonis
Bradley 2993 S.P E
Bradley 2993 S.P E
33 Leonis Minoris I E
35 Leonis Minoris .
37 Leonis Minoris .
41 Leonis Minoris .
42 Leonis Minoris .
Greenwich.
10-88
14*22
12*18
12-24
12-29
12-23
: 12-08
! "-12*13
12-25
12-30
- 6-56
n-88
12*26
12*36
12*43
12*45
8*80
12*52
12*50
12*52
12-33
12-38
12-39
12*44
12*48
12-35
12-36
19-86
12-45
12:48
12-52
12*47
12*75
12*46
12*49
12*47
12*51
-12*27
- 6*41
-12*80
-12-76
-12-81
-12*79
-16*40
-12*72
-12*66
-12*21
12*27
12*32
12'26
-12-15
12-27
12-23
Greenwich.
-12-29
-12*39
-12*45
-12*46
-12-54
-12-52
-12*54
-12*40
-12*41
-12*46
-12*50
-12*37
-12*38
Bradley 2993 S.P..
Bradley 2993 S.P.
Bradley 2993 S.P..
35 Leonis Minoris ,
44 Leonis Minoris .
46 Leonis Minoris.
54 Leonis
Greenwich.
12*47
12*50
12-53
12-48
12*47
12*50
12-48
12-52
Piazzi IX. 37
13 Leonis
t Leonis
1 6 Leonis Minoris .
p. Leonis
19 Leonis Minoris .
20 Leonis Minoris..
21 Leonis Minoris .
Piazzi IX. 254
Bradley 1399
Greenwich.
-12-82
-12-78
-12-83
-12*81
-12-74
-I2-6S
31 Lyncis.
0, Cancri..
v. 2 Cancri...
Bradley 2701 S.P.
/>[ Caucri
59 Caneri
10 Ursse Majoris....
v Cancri
38 Lyneis
a Lynois
Piazzi IX. 37
13 Leonis
19 Leonis Minoris
21 Leonis Minoris
Piazzi IX. 254
22 Leonis Minoris
Bradley 1399
Bradley 2993 S.P.
33 Leonis Minoris .
35 Leonis Minoris .
37 Leonis Minoris
"41 Leonis Minoris .
44 Leonis Minoris .
19 Urse Majoris W
38 Lynois W
W
W
W
W
W
\v
W
a Lyncis
Groombridge 3548 S.P
13 Leonis
e Leonis
16 Leonis Minoris
/j. Leonis
Bradley 1399
E 10
W 10
10*080
10*868
7*721
10*080
14-202
10*080
10*564
11*265
10*080
io'o8o
12*400
10*080
10*893
11*609
12*210
4*485
io'o8o
11*875
10*080
10*700
10*080
10*531
10*080
9.44.27*61 27-52
9. 47. 26-25 : 25-99
IO. 21. 17*82
IO. 21. 17*61
10. 26. 32*54
io. 30. 58*95
<- 33- 27'34
10. 38. 20-30
io. 40. 39*95
11-35
11-14
3 z -32
58*78
27*12
19*98
39-71
29-57
15-01
9.23.25-64
9.36. 15-30
9. 51. 56*01
io. i. 54-08
io. 5. 19-54 19-50
io. 9-43'79 4V;8
io. 15.45*31
5 r8 5
IO. 21. 19*76
io. 26. 32*55
io. 30. 59-05
io. 33.27*38
io. 38. 20*32
io. 44. 45-66
9. 9. 28-62
9. 13. o'oi
9. 15.20*51
9. 19.24-29
9. 36. 15-61
9. 40. 32-72
9. 44. 28*00
9. 47. 26-85
10. 15. 43*62
IO. 21. 24*05
IO. 21. 22*52
IO. 21. 23-23
io. 30. 59-46
IO. 44. 46*1 I
10.48. 5*37
io. 50. 33*76
9. 23. 24*70
9.36.15-71
9- 40. 32-92
9.44.28*14
9- 47- 27*03
9. 51.56*40
9-55- 37-19
io. 1.54-51
io. 5.20-02
io. 15. 43-28
8. 16. 23-04
8. 20.45-68
8.23. 3-79
8.33. 16-93
8.47. 1-09
8.51. 9-28
8. 54.32-16
8. 57. i6'io
9. 13. 0-28
9. 15. 20-69
10-34
32-39
58-96
27-21
20*02
45'43
28-30
5974
20-18
8*93
15-11
32-18
27-80
26-35
5- '95
12-31
10*52
11-49
59'JS
45*62
5*01
33-21
29-40
15-20
32-37
27-92
26*53
56*22
36-80
54'- 9
19*83
51-21
22-86
45-10
3-13
9*71
0-55
8*84
3' "97
15*48
59'94
20*29
-5'45
13*96
58-51
58*51
20*20
46*74
'4"97
-12*07
-iz'03
12-84
12*63
I2'12
I 2*04
IZ'15
12-14
27-59 '2*12
12-09
12-05
I2"O5
I2*l6
-12-15
12-13
17-14
2-74
4374
41-67
7-26
3I-33
58-62
20'20
4674
I4"97
7-84
33-20
15-92
47 '3 7
7-67
57-'7
2 '73
'977
'5'43
13-94
3975
58-68
58-68
58-68
4 6 73
33'i9
52-57
21-04
16-94
2-72
19-76
15-41
13-93
43 7 i
24-29
4i'65
7-24
39-63
IO'I2
32-40
50-38
57-82
47^9
56*21
'9'34
2-88
47-33
-12-43
-I2'27
-I2'24
-12*27
-I2-24
-I I"72
-12-19
-12*22
-12-24
12*23 I
-12*29
-12*26
-12*28
-12*25
-12*26
12*20
12*23
12*25
12*19
12*24
12-37
I2-5I
11-76
12-38
I2-4I
12-37
12'41
12'20
13-63
-12-42
-12-43
-12-44
-12-17
12*46
12-48
I2'6l
-12-51
I2'6o
12-51
-12-51
12-54
12-59
11-58
-12-74
-12*70
-12*75
-11*89
-12*56
-12-63
-12-63
-I2"6o
-12*61
-12*66
-12-40
-12-39
-12-53
-12-40
-12*43
-12*39
-12*43
-12-43
-12*44
-12*45
-12-18
12*49
12*62
12*52
I 2*6 1
12*52
12-52
-12-55
12*60
-12*76
-12-72
-12*77
-12*57
-12-64
- 12*64
-12-62
-12-67
284
TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Star's Name.
< a
31
Observed
Transit.
-si
O i-
Star's Name.
<
Observed
Transit.
leg
o
1902 March 25 continued.
Groombridge 3548 S.P
10 Leonia Minoris
9 Leonis
13 Leonis
t Leonis'
16 Leonis Minoris
11 Leoiiis
19 Leonis Minoris
21 Leonis Minoris
Piazzi IX. 254
22 Leonis Minoris
Bradley 2993 S.P
Piazzi IX. 37 E
9 Leonis E
13 Leonis ' E
16 Leonis Minoris E
ft. Leonis E
19 Leonis Minoris E
20 Leonis Minoris E
21 Leonis Minoris E
1902 March 28.
Groombridge 1119..
15 Cancri
X Cancri
31 Lyncis
</>j Cancri
u. 2 Cancri
Groombridge 1450.,
Bradley 2701 S.P..,
36 Lyncis ....................... W
19 Ursae Majoris .............. I W
Lyncis
Piazzi IX. 37
( Leonis ....................... W
16 Leonis Minoris ............ j W
H Leonis ....................... W
19 Leonis Minoris ............ W
20 Leonis Miuoris.... ,.IW
21 Leoiiis Minoris.
Bradley 1399
1902 March 27.
Groomhridge 1119 W ii
31 Lyncis W 9
u 2 Cancri W 9
Groombridge 1450 W 7
Bradley 2701 S.P W io
i Cancri W 7
p l Cancri W 9
59 Cancri W 9
10 Ursae Majoris W 9
E 10
1902 April 7.
Bradley 2701 S.P W, 6
Piazzi IX. 37
9 Leonis
13 Leonis
e Leonis
16 Leonis Miuoria.
p Leonis
Bradley 2993 S. P..
44 Leonis Minoris.
54 Leonis..
E 10
E 9
ih
E > 9
E i 8
E 10
E! 7
K 9
47 Ursae Majoris I E 9
Bradley 31478.? E 10
086
080
7-691
9'449
10*080
12-861
10 080
13-863
io'o8o
10*174
io'o8o
7737
7 | 10*080
9 .,
9 j ,,
9 9' 6 33
10*080
8-870
9. 19. 26-92
9. 28. 28-73
9. 32. 29-07
9- 3 6 - '5' 8 7
9.40. 32-97
9.44.28-25
9. 47. 27-07
9.51.56-51
!O. I. 54*63
I O. 5. 2O"O2
10. 9.44*36
IO. 21. 25-84
8. o. 33-72
8. 16. 23-11
8. 23. 3*68
8. 26.48*26
8. 33. 16*65
8.41. 1*66
8.47. i - 2i
8.51. 9-39
8- 54- 3*'39
9.23.27-53
9- 3 2 - 2 9' 6 7
9. 36. 16*42
9.44.28*78
9-47- 2 7'55
9.51.57*19
9- 55- 3774
10. 1.55-05
8. 0.26*75
8. 7. 20*17
8. 14. 22*49
8. 16.23*34
8.20.45*99
8. 23. 4*07
8. 26.48*67
8. 33. 17*26
9. 8.39*51
9- 9-*9' 2 3
9. 15.21*03
9. 23. 25*80
9.40.33*29
9. 44. 28*63
9-47- 2 7'5'
9.51.56*98
9-55-3779
10. i. 55*02
10. 15.45*65
'3'34S I 8.35.23*12
10-360
10*080
8*218
10*080
12*720
9- 2 4-
9-33-
9.36.
9.41.
9.45.
10. 21.
10.45.
10. 51.
10. 54.
11. 28. 27*27
2'33
4*12
5079
7*92
3-38
2*01
547'
21*37
9*26
49-48
9'49
28*37
28*44
15*27
32*32
27*98
26*47
56*28
54' 2 4
19*78
43*88
12*21
j 5 8 '4
i '577
'15*87
2*69
'974
15*38
<3'9'
43*69
41*63
7*21
31*29
59' 2 3
-11*45
-12*60
-12-57
-12-58
-12-58
-I 2*6o
-12-56
-12-59
-I2'6l
-12-57
-12*59
-12*98
9*46
22*89
3*12
47^3
11-42
7-I7
0*72
8-97
32-14
31*24
29*09
15*86
28*46
26*99
56*90
37*28
54*64
5'33
19*60
21*88
45'39
3'4'
48*26
11*57
39*26
28*78
20*58
30*06
32*65
28*29
26*91
56*67
37' 2 9
54-59
5 2 '93
50*37
4-22
4-03
50*71
7-83
3*42
1*93
5'54
21-31
9*17
49'5 2
21*68
5476
io'o8
5'35
35*20
58*08
: 48*36
47'95
56*18
19*31
16*49
'5'*5
2*67
15*36
13*88
43*66
24*24
41*60
53*68
6*63
8*85
10*06
3 2 '35
50*33
35*18
58*21
26*31
15*83
7-58
16*38
19*70
>5'34
13*87
43^5
24*23
41 '59
3893
-14*70
-12*81
-12*77
-12-73
'3 '34
-12*81
-12-77
-12-79
-12-83
-'475
-13*24
-13*19
-13*10
-13*11
-13*24
-13*04
-13*04
-11-65
-12*97
-'3'3
-12*99
-13*04
-13*08
-13*08
-13*36
-12-95
-12*95
-13*00
-13-68
-12*95
-12*95
-13*04
- 1 3*02
-13-06
- 1 3 -oo
-14*00
5 9 '49
15-27
15-70
2-52
19*58
15*18
1375
1*48
33*08
20*94
1*33
36*48
50*88
48*95
-48*33
-48*19
-48-25
-48*24
48*18
49*06
-48*23
-48*23
48*19
45*20
Greenwich.
-12*61
-12-58
-12-59
-12-59
- I 2'6l
-12*57
- I 2'6o
-I 2*62
-12*58
-I 2'6o
Bradley 2993 S.P.
41 Leonis Minoris.,
42 Leonis Minoris..
44 Loonis Minoris..
46 Leonis Minoris..
54 Leonis
47 Ursas Majoris....
51 Urste Majoris....
i// Ursee Majoris
8 Leouis
Bradley 3147 S.P. .
Bradley 3147 S.P. .
Greenwich.
-12*82
-12*78
-12*74
-12*82
-12*78
-12*80
-12*84
-13*25
-13*20
-13*11
-13*12
-13*25
-13*05
-13*05
Piazzi IX. 254
22 Leoiiis Minoris..
A Ursce Majoris
Bradley 1399
Bradley 1399
Bradley 2993 S.P. .
Bradley 2993 S.P. ,
41 Leonis Minoris W
42 Leonis Minoris | W
44 Leonis Minoris W
46 Lconis Minoria W
54 Leonis W
47 Ursae Majoris W
Bradley 3147 S.P W
Bradley 3147 S.P E
Greenwich.
-12*98
-13*04
-13*00
-13*05
-13*09
-13*09
-12*96
-12*96
1 3 *o i
-12*96
-12*96
-13-05
-13*03
-13*07
-13*01
Bradley 2993 S.P. ,
Bradley 2993 S.P..
47 Ursae Majoris...
51 Ursae Majoris...
i/ Ursae Majoris...
8 Leonis
v Ursse Majoris...
Bradley 3147 S.P.
Bradley 31478.?
67 Ursse Majoris
Piazzi XII. '3
4 Comas
2 Canum Venaticum...
Bradley 1672
12 Comae
13 Comae
14 Comae
21 Comae
$ Canum Veuaticum
W
W
W
\V
\v
W
W 10
Paris.
-48-35
-48*21
-48*27
-48*26
-48*20
-48*24
-48*24
Bradley 3147 S.P
92 Leonis
Virginis
Groombridge 1830
67 Ursae Majoris
Bradley 1672
21 Comae
23 Comae
9 Canum Venaticum
31 Comse
35 Comse
W
W
\v
W
\v
W
W
W
W
W
W
\v
7'933
10*080
94 2 3
io'o8o
8*308
11*582
"655
8*578
10*080
8*326
8*548
IO. 21. 24*14
10. 38. 21*43
10. 40. 40*84
10.44.46*58
10.48. 5*84
10. 50. 34*57
io. 54- '4'57
10. 59. 20*27
'ii. 4. 25*06
n. 9. 9-92
1 1. 28. 3*69
11.28. 5*34
io. 5. 20*74
io. 9.44*88
io. ii. 27*34
10. 15. 46*25
o. 15.46*73
s
10*77
20*75
40*32
46*00
5'4'
33-93
14*31
33-i8
5 2 '55
21*03
''44
7*06
24-93 i 12-09
9-20 | 56-34
49-78 ! 34-69
59' 2 3
7-82
11-54
12-93
12-75
12-82
12-86
12-90
12-87
12-89
12-84
12-86
15*09
51*07 34*69 16*38
20*44
44-4I
27*09
52*61
53'9
io. 21. 21*99 I ' 2 '46
io. 21. 22*08 12-55
io. 38. 21*15
10.40.40*75
io. 44. 46*49
10.48. 5*64
io. 50.34*35
10. 54. 14.50
11. 28. 3*05
20*58
40*30
45'99
5' 2 5
33*80
14*23
50*06
11.28. 2-30 | 49*67
8*928
12*320
10*080
9-044
7-161
io'o8o
10-117
10.21.23-33
IO. 21. 22"55
io. 54. 14-65
10. 59.20-34
11. 4. 25-18
ii. 9. 9*93
11. 13.27*19
11.28. 2*89
11.28. 3*13
11.57.24*07
12. 6. 3*59
12. 7. 8*97
12. II. 28*82
12. 14. 37-29
12. 17. 50-93
12.19. 3971
12. 21. 46*20
12. 26. 23*17
12. 29. 2I'I9
11-734 I ii. z8. 33*51
IO*o8o II. 36. 32*04
11.41. 4*66
II. 48. 10*65
11. 57. 58*91
12. 15. 26*99
12. 26. 57*59
12. 29. 48*81
' 2 -34- 53'99
I 2. 45. 21*64
12. 47. 46*07
12. 49. 18*81
12*45
11*67
'4'33
19*97
24*96
9*24
26*72
48*47
49-07
2 3'79
2-98
8-34
28-48
'37
50-30
39-08
45'59
22-52
20*86
9'554
10*080
7''9
31*28
'3'99
39'07
39*07
59-58
7*80
2 7'55
33*16
5 2 '54
21*02
1-43
34*96
34*96
13*25
13-13
13*10
'3'54
14*02
12*88
12*97
12*78
1275
12-83
12-71
12-78
12'8o
15-10
14*71
5976 12*69
5976 ,
1*42
7*04
I2'O7
56-33
'379
35:10
27*56
31*96
4*50
10*70
59*01
37'33
57'53
48-74
54'07
2l'6o
46*03
18-73
35*10
10*97
50*02
55'35
15*58
49'74
37'37
26*12
3 2 '59
9*50
7-92
36*48
43-87
16*51
22*61
10*94
48*72
9'5 2
0*64
6*0 1
33*56
58*06
30*79
12-91
12-93
12-89
12-91
12-93
'3'37
12*94
12*76
12*83
12*87
12*91
12-88
12-89
12-84
12-86
13-26
13-14
13-11
12-78
12-75
12-83
12-71
12-78
12'So
-13-97
-12-82
-12-96
-12-99
-12*90
-10*63
-12*93
-12*96
-13*00
-13*02
-12*94
-51*08
-48*09
-47'99
-48*09
-48*10
-48*61
-48*01
-48*10
-48*06
-48*04
-47'97
-47'94
-12*91
-12*93
-12*89
-12*91
-12*93
-12*82
-12*96
-12*99
-12*90
-12*93
-12*96
- 1 3 *oo
-i 3*02
-12*94
48*09
47-99
48*09
48*10
48*01
48*10
48*06
48*04
47'97
47'94
STAR-TRANSITS OBSERVED BY MR HOLLIS WITH TRANSIT C., AND RESULTING CLOCK ERRORS.
285
Star's Name.
MS
i
Observed
Transit.
il!
Star's Name.
Observed
Transit.
3 a'*'
ir
Ill
32.5
1902 April 8.
Bradley 1399
Bradley 2993 S.P...
33 Lconis Minoris.,
35 Lconis Minoris..
37 Leonis Minoria..
41 Leonis Minoris..
42 Leonis Minoris.
\V
w
w
w
w|
w
w
46 Leonis Minoris I W
1902 April 9.
13 Leonis
e Leonis
16 Leonis Minoris-
H Leonis
19 Leonis Minoris
20 Leonis Minoris
22 Leonis Minoris
Bradley 1399
Bradley 2993 S.P
Bradley 2993 S.P
37 Leonis Minoris ; K
41 Leonis Miuoris j E
46 Leonis Minoris .
54 Leonis
47 Ursa; Majoris....
51 Urs;e Majoris....
\l/ Ursae Majoris.. ..
\V
W
W
w
w
9-632
1902 April 11.
38 Lynris
a Lynris
Piazzi IX. 37
13 Leonis
t Leonis
/i Leonis
19 Leonis Minoris
Bradley 1399
Bradley 2993 S.P
Bradley 2993 S.P
35 Leonis Minoris
37 Leonis Minoris
41 Lt-onis Minoris
W 9
W| 9
W 10
W 1 8
w: 9
W g
W 9
W 10
W 10
42 Leonis Minoris I E 9
1902 April 13.
Groombridge 3548 S.P W 10
Piazzi IX. 37 E
9 Leonis I E
13 Leonis I E
e Leonis
16 Leonis Minoris
/j. Leonis
20 Leonis Minoris
21 Leonis Minoris
Piazzi IX. 254
Bra'lley 1399
Bradley 2993 S.P
Bradley 2993 S.P. ,
47 Uvsie Majoris....
51 U r.i Majoris....
ij/ Ursae Majoris
5 Loonis
v Ursa- Majoris
Bradley 3147 S.P. .
Bradley 3147 S.P. .
59 Ursae Majoris...
92 Leonis
I'iazzi yi. 146
998
389
179
'080
io'o8o
io'o8o
8715
io'o8o
io'io6
8-596
6-677
lo'oSo
1-351
>'o8o
10-967
12-003
12-966
10*080
9-482
11-582
io'o8o
10. 1 6. 20-97
1O. 21. 56-96
10. 27. 8'02
10. 31. 34-56
10. 34. 2-85
10.38.55-72
10.41. 15-51
10. 48. 40-40
9- 3 6 -
9.41.
9-44-
9. 48.
9.52.
9- 5 6 -
10. 10.
10. 16.
IO. 21.
IO. 21.
10. 33.
10. 38.
5073
7-88
3-21
1-97
31-60
12-31
19-29
22-63
54'97
S476
3-01
55-96
10. 48. 40*74
10. 51. 9-18
io. 54. 49-60
10. 59.55-23
11. 5. 0*24
24-42
5 2 '44
8-06
34^3
2-88
5 5 '69
5"53
40-45
50-86
7'99
3-45
2'10
31-85
12-48
19-46
25-81
51-16
5'95
3-18
56-07
40-96
9'33
49-87
55^
0-56
9- >3- 35'33
9- '5- 55' 6 9
9. 23. 59-90
9. 36. 50-83
9-4i. 7'93
9.48. 2-1 1
9-54.31-58
10. 1 6. 19-70
IO. 21. 58-29
io. 21.57-25
io. 31. 34-89
io. 3. 3-16
io. 38. 56-16
io. 41. 15-78
9.19.55-38 50-83
9.24. 1-99
9- 33- 4'93
9- 3 6 - 5'73
9.41. 8-93
9-45- 4'35
9.48. 3-16
9- 5 6 - '3'44
10. 2. 30-85
io. " 5. 56-28
10. 16. 24-13
10. 21. 54-54
10. 21.
io. 54.
10. 59 .
11. 5.
II. 9 .
11-14.
II. 28.
II. 28.
ii. 33-
1 1. 36.
11.39.
57-28
50-38
56-11
1-13
45^5
2-86
3 2 '94
32-84
59-I5
33''5
1772
2'So
! 4-37
51-18
: 8-36
3-88
2'6l
12-92
30-35
55-81
25-78
51-16
I
: 53-64
' 49 '94
I 55-66
[ "7 2
45-00
2 '37
28-23
28-13
5874
32-60
17-29
j35'5 6
155-89
3'4
i 5'94
8-01
! 2--J2
3f87
; 2 473
51-98
5' '2
35-09
V3
56-21
15-91
37-35
1-71
20-02
46-56
14-81
77'
2 7"45
5 2 '44
2-49
'9'55
15-15
13-72
43'45
24-07
31-12
37-15
i '95
i'95
14-80
7-70
20-93
1-31
6-94
11-96
47'03
7^5
14-64
z- 45
19-52
13-69
43-42
3677
2-42
2-42
46-52
14-78
7-68
27-42
14-48
15-61
2-42
19-49
15-08
13-66
24-01
41-37
6-93
36-43
2-85
2-85
1-26
6-89
11-90
56-24
13-67
3785
9-96
28-59
-47-07
-573
-48-04
-48-07
-48-07
-47-98
-48-08
48*44
48*30
-48-38
48-40
-48-41
48*34
48*66
49'2i
49*00
-48-38
-48-37
-48*53
-48*56
48*54
48*60
-48-53
-48-54
-48-40
-48-49
-48-49
-48-51
-48-45
-47-96
-49-56
-48-78
-48-57
-48-52
-48-53
-48-49
3-90 , 46-93
-48-32
-48-76
-48-76
-48-87
-48-80
-48-95
-48-91
-48-98
-48-88
-49-35
-48-31
-50-79
-48-68
-48-77
-48-82
-48-76
-48-70
-50-38
-50-28
-48-78
-48-76
-48-70
Paris.
-48-05
-48-08
-48-08
-47-99
-48-09
-48*02
ty Ursae Majoris
j Leonis
Ursae Majoris | W
w
Bradley 3 1478. P.,
Bradley 3147 S.P.
92 Leonis ........... .
67 Ursae Majoris.. .
Paris.
-48-38
-48-45
-48-31
-48-39
-48-41
-48-42
-48-35
-48-39
-48-38
-48-54
-48-41
-48-57
-48-55
-48-60
S Leonis
v Ursae Majoris
Bradley 3147 S.P.
Bradley 3147 S.P.
92 Leonis
Piazzi XI. 146 ,
Virginia
Bradley 1672
Bradley 1672
13 Gomie
14 Com;e
21 Coras
j8 Canuin Venatioum .
23 Comas
9 Canum Venaticum .
Paris.
-48-54
-48-55
-48-50
-48-50
-48-54
-48-45
-48-58
-48-53
-48-54
-48*50
44 Leonis Minoris .
46 Leouis Minoris .
51 Ursae Majoris....
Bradley 3147 S.P.
Piazzi XII. 3
4 Comae
Bradley 1672
Bradley 1672
Bradley 1672 ,,
21 Comae
Canum Venatieum
9 Canum Venatioum
31 Comae
35 Comas
Paris.
-48- 77
-4877
-48-88
-48-81
-48-96
-48-92
-48^9
-48-89
-48-69
-4878
-48-83
-4877
-4871
-4878
-48-76
-4870
67 Ursa; Majoria ! W
Piazzi XII. 3 j W
Bradley 1672 W
Bradley 1672.
9 Canum Venaticum.
Groom bridge 1919....
30 Coma;
31 Comae
35 Comae
a Canum Venaticum .
/8 Comae
23 Canum Venaticum
Groombridge 1986
Polaris S.P
Polaris S.P
Piazzi XIII. 136
25 Canum Venaticum
i Bob'tis
B.F. 1898
B.F. 1905
Piazzi XIII. 235
9 Bobtis
io'o8o
9*864
6-893
io'o8o
10*080
8*282
10*080
10-669
10*080
10*080
10*342
10*080
8-625
9*988
10*080
9 io'o8o
8;
io ! 10-007
io ; 12*540
io'o8o
9'
9
9
9
9
10*080
10-031
9-094
10*080
h m s
II. 4. 59*81
ii. 9.44*29
II. 14. 1*69
n. 28. 31*89
11.28. 28-53
ii. 36. 30-15
11.57.59-11
ii. 9.44-69
11.14. i'93
ii. 28. 30-70
ii. 28. 30-93
11.36.32-17
11. 39. 16-74
11.41. 4*76
12. 15. 27-94
12. 15. 28-89
12. 2O. I4'53
12. 22. 2I'I2
12. 26. 57-91
12. 28. 56-28
12. 30. 49-06
I 2 - 34- 54^5
io. 45. 21-56
io. 48. 40*81
io. 59. 55*24
n. 28. 33*54
12. 6. 38*49
12. 7.43*89
12. 15.25-34
12. 15. 24*75
12. 15. 19*86
12. 26. 58*11
12. 29. 56-32
IZ-34-5V35
12.47.46-49
12.49. i9' 2 9
1 1. 58. 0-04
12. 6. 39-27
12. 15.28-74
12. 15. 31-03
12. 34. 55-20
12. 40. 41-38
12.45.2277
12.47.47-33
12. 49. 20*09
12.52. 18-45
16.,
13
13
13. 20.
13- 2 3-
13.23.
13-31.
13-33.
13-36-
I3-45-
13-47-
13-49-
13. 52.
19-48
5 r 97
52-89
17-21
58-42
i 1 ' 66
5-31
41-69
35^3
57-67
59'97 , ii-97
44-24 ; 56-28
1-73 13-72
25-81 36-70
12*81 36*70
32*09 ! 43*87
59-22 10-94
44-81
2-14
25-17
2576
32-30
17-03
4-81
38-41
14-66
21-26
58-03
56-53
49-16
54-50
21-66
40*98
55-46
25-38
38-58
43^7
40*01
39'4 2
35-18
58*20
56-62
54' 6 4
46-61
19-35
59-62
3875
35-59
5477
40-97
22-25
46-81
i9'54
18-00
9-64
47-11
18-99
4i-43
42*35
16-72
57"9 2
51-09
478
41-18
34^9
57-12
56-27
13-71
36-93
36-93
43-86
28-63
16-50
48-18
48-18
26*13
32*61
9'53
7'94
0*64
6*02
33'04
52*41
6*92
37"4 2
50*01
55-40
47-56
47'5 6
48-00
47-96
48-01
49-11
46-11
48-22
48-28
-48-54
48-43
-48-24
-48-83
-48-44
48-40
-48-31
49-28
50-23
-48*53
-48*65
48-50
48-59
-48-52
-48-48
-48-62
-48*57
-48-54
-47-96
-48-57
-48-57
-5 2 '45
-51*86
47-56
7'93
6 '02
58-07
30-80
47-62
48-67
48-69
48-62
48-54
10-91 I
50*00
47-00
47-00
6*01
52*23
33^6
58*07
30*80
29*24
20-57
58-07
29-96
57-86
57-86
27-83
8-93
2-18
15-94
52-26
46-12
8-20
48*71
4875
48 59
50*23
48*76
48-74
48*69
-48*74
-48*74
-48-76
49*07
49-04
49-03
-43-57
44-49 ,
48-89
-48-99
-48-91
-48-84
48-92
- 4 S'S 7
-48-92
-4876
-48-74
-48-69
48-74
-4874
-48-75
49-06
49'03
49-02
-48-88
-48-98
-48-90
-48*83
-48*91
-48*86
-48-91
GREENWICH OBSERVATIONS, 1902.
2 o
286
TELEGRAPHIC DETERMINATION OF LONGITUDE. PARIS-GREENWICH, MADE IN 1902.
Star's N:ime.
Observed
Transit.
Slur's Name.
.1
Si
Observed
Transit.
"" "
1902 April 14.
Piazzi IX. 37
X Leonis
io Leonis Minoris.
1902 April 17.
9 Leonis
13 Leonis
< Leonis ...
1 6 Leonis Minoris.,
u Leonis
19 Leonis Minoris.
20 Leonis Minoris.
Piazzi IX. 254
22 Leouis Minoris.
Bradley 1399
Bradley 2993 S.P.
51 Ursae Majoris...,
<fi Ursa- Majoris
j Leonis
v Ursre Majoris
Bradley 3147 S.P.
59 Ursae Majoris...,
92 Leonis
Piazzi XI. 146
Virginis
Piazzi XII. 3
4 Comae
Bradley 1672
1902 April 18.
w
9
w
9
w
g
w
9
w
g
w
9
w
9
w
6
w
w
IO
w
IO
E
9
E
9
E
9
E
9
E
IO
E
9
E
9
E
9
E
9
E
9
E
9
E
IO
10 10*942
6 10*080
10*080
8-153
9.^24. 0-91
9- *6. 59''4
9. 19. 4-64
9. 33. 5-30
9- 3 6 - 5 2 ''4
9.41. 9-22
9-45- 4'6i
9.48. 3-44
9- 5 Z - 3*-96
9.56. 13*65
10. 5. 56-57
10. 10. 20*82
10. 1 6. 21-96
IO. 21. 59'26
lo'oSo 10. 59. 56-62
It. 5. 170
,, ' II. 9. 46-28
' ii. 14- 3' 6 '
9-829 , ii. 28. 34-61
io'o8o j ii. 33. 59-61
11.36.33-78
11. 39. 18-27
11.41. 6-56
12. 6. 39-97
12. 7.45-40
9-353 12.15.27-23
58-68
4-87
51-72
8-78
4'3'
3 "02
32-67
13-28
56-28
20-44
25-07
54'*4
56-28
1-42
45-80
3-22
28-36
59'3 2
33-3 1
17-96
6'oo
39'53
44'95
37 '7
19 Leonis Minoris..
F,
20 Leonis Minoris
F,
Q
21 Leonis Minoris....
F,
u
Piazzi IX. 254
F
F
Bradley 2993 S.P
F
1C
Q'lSz
33 Leonis Minoris
F
10*080
35 Leonis Minoris...
K
F
41 Leonis Minori?
F,
44 Leonis Minoris...
K
6
"
46 Leonis Miuoris
F,
v Ursae Majoris
W
It
Bradley 3147 S.P. .
W
6*805
Bradley 31478.?
W
Bradley 31478.?
F,
"W
W
W
ft
W
67 Ursae Majoris
W
Piazzi XII. 7...
W
o
9. 52.
3 3 '9
32-88
9.56.
13*81
1 3 '49
IO. 2.
31*05
30*77
io. 5.
56*56
56*35
10. l6.
21-52
25'5 2
IO. 21.
59-89
io. 27.
974
9'43
io. 31.
36-25
35-98
io. 34.
4'5 Z
4-20
10. 38.
57'57
57-16
10.45.
22-87
22-51
10.48.
42" 1 1
41-82
II. 14.
3'36
3-08
11.28.
38-21
29-84
II. 29.
38-34
29-97
II. 28.
35'43
27-42
11.39.
18*18
18-01
II. 41.
6*42
5-92
II. 48
12*21
11*99
11.53
4-36
4''7
II. 58
0-36
0*2 1
12. 6
39-60
39-26
1902 April 19.
21 Leimis M inoris W
Piazzi IX. 254 W
IO'o8o
52-32
13*62
38*86
38*86
38-86
28*54
16*46
22*54
'473
IO-87
49-98
2. 31*00 30*85 41*27
5- 56'39 5 6 '34 6*82
M'37
9-88
1 5 '44
5'55
2-37
'9'43
15-00
13-60
43'3'
-3-95
6-85
3 1*00
3579
6-84
11-85
56-20
13-63
38-64
9-91
43-82
28*55
16-47
49'99
55'38
46-11
43'->9
2 3"93
41-29
6-84
35-6,
3-88
19-89
46-42
14-68
7-59
1902 April 20.
21 Leonis Minoris I W
Piazzi IX. 254
22 Leonis Minoris W
Bradley 1399 W
Bradley 2993 S.P W
33 Leonis Minoris W
35 Leonis Minoris W
37 Leoi.ia Minoris ! \V
46 Leonis Minoiis : W
54 Leoiiis W
51 Ursa; Majoris W
9 io
I
080
u
,-873
'55*
IO. 2.
JO. 5.
IO. IO.
io. 16.
10. 22.
io. 27.
io. 31.
io. 34.
io. 48.
io. 51.
io. 59.
3'93
56*44
20*59
'779
3'5
9*72
36*15
4*40
42*05
10-68
56-48
375
56*34
20*36
22*97
55*62
9*50
35'99
4*18
41*86
10*37
56'35
Paris.
-4877
-48*80
-48*87
Leonis .
-48*81 n Leouis
-48*88 Bradley 2993 S.P.
Paris.
49*32 i
49'35
49'35
49*31
49*42
49-36
49'33
49'43
49-44
49-28
50-59
49'44
49-57
49-60
49'59
49-72
49-41
49-49
49*41
49-53
49'54
49'57
-50*96
49-33
-49*36
-49*36
-49'43
-49'37
-49'34
-49'44
-49'45
-49'57
-49-60
-49'59
-49-41
-49-49
-49-41
-49-53
-49"54
-49'57
Brailley 1672 W
.21 Coma?
Canum Venaticum.
23 Comse
9 Caniim Venaticum .
a C'anum Venaticum .
2 Ursa* Minoris S.P...
14 Canum Venaticum
15 Canum Venaticum
$ Comae
Piazzi XIII. 27
19 Canum Venaticum
20 Canum Vennticum
23 Ciininn Venaticum
Piazzi XIII. 71
Groombridge 1986
Polaris S.P
Polaris S. P..
Polaris S. P.
Paris.
41-25
6-80
30-96
35-20
4'38
19-86
46-39
14*65
52-29
20*81
6-80
49'59
-49-56
49-48
49'5'
-49*91
49-96
49'54
-49-56
49-52
49'57
49-56
49*50
49*46
-50*98
51-11
-48*56
49 '47
49*46
49'45
49*44
49'34
49*28
-49*58
49'5 2
-49*50
-49'54
-49*40
-4777
-51*24
-49-64
-49*60
-49'53
-49'57
-49*56
-49'55
49*60
49-57
49'49
49-52
49'54
49*56
49'57
49*56
49*50
49*46
-49'47
-49*46
-49'45
-49'44
-49'34
-49-28
4 Com.t?
Brailley 1672.
Bradley 1672.
14 Comse
21 Comae
3 Canum Venaticuni.
23 Comae
9 Canum Venaticum
Groombridge 1919 ....
30 Comse
31 Comae
35 Comae
2 Ursa; Minoris S.P...
Piazzi XIII. 27
20 Canum Venaticum
23 Canum Venatieum
Polaris S.P
B.F. 1898
B.F. 1905
Piazzi XIII. 235
Paris.
49*58 II Bradley 1399 i^i
49*52 || Bradly 29938.? | W I
Paris.
-49*50
-49-54
-49* 4 o
-49*64
-49*60
-49-53
-49-57
-49*56
-49-55
Bradley 3147 S.P.,
Bradley 3147 S.P.
w
E
E
E
14 Comie... | E
1 Coma! K
Piazzi XI. 146 .
J Virj-inis
Brailley 1672.
3 Canum Venatieum.
23 Coma;
lo'oSo
9*436
9.41. 8*87
9.48. 3-07
10. 21. 58*08
io| 8-649 12.15.24-16 [34-65
10*o8o
10*427
IO*oSo
IO'o8o
12. 26. 59*45
12.29. 5775
12.30.50*55
12. 34. 55*82
12. 52. 18*99
12. 56. 3*12
13. 2. r86
JO'377
7775
6*460
13. 6. 371
13. 8. 10-31
1 3. 10. 8"66
13. 11.59-93
13. 14. i"i8
13. 1 6. 47*80
13. 18. 38*92
13. 20. 19*58
13.24. 5-12
13.23.59*81
13.23.59*25
w
9
w
10
E
10
W
W
j
W
w
7
w
9
w
Q
w
6
w
9
w
g
w
IO
E
Q
E
7
9
E
9
E
9
E
8
K
8
E
Q
I0'o8o I 12. 7. 45-24
II'Sll I 12. 15. 20'1I
10-348 12. 15. 24-04
10*080
11-904
lo'oSo
9-048
lo'oSo
| 11-167
j 12*023
10739
13-780
lo'oSo
11-748
10*080
12. 22. 22'4O
12. 26. 59'32
12. 29. 57-56
12. 30. 50-50
12.34. 55-58
12. 40. 41'78
12.45.23-35
12.47. 47'9
12. 49. 2O-&5
12. 56. 6'2O
13. io. 8-86
13.14. 1-41
13. 16.47-88
13.23. 59*97
13.45. 5*86
13.47.42*13
13. 49. 36*06
I io. 16. 18-95
I io. 22. 3*24
58-99
57'44
50-08
55'5
18-65
58-24
1-49
3-40
9-91
8-36
59-64
0-89
47'5
38-67
19-25
48-49
44' 1 3
43'57
44-89
33-88
37-16
22-06
58-96
57'39
5O'I2
5 5 '4
41-65
23-02
47'5'
20"26
59'73
8-64
I "20
47-66
39-60
5'53
41-84
35'7'
25-40
54-16
ii. 28. 41-54
ii. 39. 18-45
1 1. 41. 6*65
12. 15. 20-90
12. 22. 22'j6
12.26. 59-43
12. 29. 57-65
12. 30. 50*65
18-34
6-, 5
36-87
22-25
59-09
57'53
50-29
19*48 -
8-42
= '64
52-02 3-05
48-94
48-99
48-97
46-11 148-54
9'5-
7'9'
0-63
5 '99
29-23
9-64
14-00
20-57
18-94
10*19
11-51
58-07
49'33
29-96
58-15
58-15
58-15
11.28.37-35 27-82 39-38
3'' 6 5 i39'3 s
28-52
16-45
45-16
32-58
9-50
7-89
0-62
49*48
49-53
49'45
49'5i
49-42
48-60
49'39
49-40
49'34
49*42
49'45
49-38
49'43
49'34
49-29
50-34
-45-98
55'37
45-84
45-84
9'5 '
7-90
0*63
5 '99
52*22
58*07
30*80
9*71
18-94
11-52
58-08
58-26
15-96
52-29
46-16
4-12
-49-52
-48-04
51-32
49'47
49'45
49-49
49'49
49'4>
49'43
49-46
49'44
49-46
50-02
-49-70
-49-68
-49-58
-41-34
-49'57
-49'55
-49'55
49'99
50-04
-48-44
-52-27
-49-82
49-70
51-71
49-67
49'59
49-64
49-67
-4 S '95
-9*00
49-48
49'53
49'45
49"5'
49-42
-49-38
49'39
49'33
49-41
49'44
4y'37
49-42
49'33
49-28
49-52
-49'47
-49"45
-49'49
-49'49
-49-41
-49'43
-49-46
-49'44
-49-46
-49-70
-49-68
-49-58
-49-56
-49'54
-49'54
-49-82
-49-70
-49-67
-49'59
-49-64
-49-67
STAR-TRANSITS OBSERVED BY MH HOLLIS WITH TRANSIT C., AND RESULTING CLOCK ERRORS.
287
Star's Name.
.1
*.
Observed
Transit.
Star's Name.
Observed
Transit.
1-T
S--..C
3 C ""3
S3
1902 April 20 continued.
9 Canum Veiiuticum E
Groombridge 1919 | E
30 Comae ' E
31 Coma; ! E
a Canum Venaticuin E
2 Ursas Minoris S.P K
2 Ursne Miuoris S.P
14 Canum Venaticum.....
15 Canuin Venaticum ....
17 Canuin Veuaticum ....
1902 April 21.
Piazzi IX. 254 j E
22 Leonis Minoris E
Bradley 1399 E
Bradley 299 3 S.P E
44 Leonis Minoris ' E
46 Leonis Minoris I E
54 Leonis
47 Ursae Majoris...
51 Ursae Majoris...
S Leonis
v Ursae Majoris...
Bradley 3147 S.P.
Bradley 3147 S.P
92 Ltonis
| Virginia
Groonibridge 1841
67 Ursse Majoris
Piazzi XII. 3 ,
4 Com; 1 - 1 .
Bradley 1672
Biadley 1672
1902 April 23.
Bradley 2993 S.P...
35 Leonis Minoris..
44 Leonis Minoiis..
46 Leonis Minoris..
54 Leonis
Bradley 3147 S.P. .
Bradley 3147 S.P. .
Piazzi XI. 146
{ Virginia
Groombridge 1830.
Groombridge 1841 .
67 Ursse Majoris
Piazzi XII. 3.
4 Comae
Bradley 1672.
Biadley 1672.
1902 April 24.
54 Leonis
i|( UrsiE Majoris
8 Leonis
y Ursae Majoris...
Bradley 3 1 478. P..
Bradley 3 1 478. P..
Piazzi XI. in
59 Ur*<e Majoris. ,
92 Leonis
Piazzi XI. 146
Virginia
Bradley 1672
ic'oSo
11-251
2- 34- 5572
12. 40. 4I'9I
12.45.23-46
12. 47. 48*08
12. 52. 19*08
12. 56. 5-56
W 10 i 13*384 [ 12. 56. 7*44
W I 9 10*080 113. 2. 1*94
W 7 [13. 6. '3*93
W; 6 ,, [13. 6.25*61
W 10
9 , 10*080
9
10 14*890
9
10*080
10
10*215
13-35
10*080
10*402
8-409
10*193
10*080
9*678
13*460
10*080
io'o8o
; t
9*193
8*677
7 i 10*080
9
9
9
11-560
9-560
10*080
9*422
10. 5.
10. 1O.
10. 16.
IO. 22.
10.45.
10. 48.
10. 51.
10. 54.
10. 59.
11. 9.
II. 14.
11.28.
56-42
20-84
19-12
2*31
22*85
42-09
10*73
5078
56-46
46*15
3'4i
39'53
1 1. 29. 41*11
< i. 3 6 - 3377
11.41. 6*48
11.53. 4*50
11. 58. o'34
12. 6. 39*73
12. 7.45*17
12. 15. 15*96
12. 15. 16*16
10. 22.
io. 31,.
10.45.
10.48.
10. 51.
11.28.
11.28.
11.39.
11. 41.
11.48.
11.53.
II. 58.
4*89
36*24
22*88
42-13
1079
42-30
42*62
18-32
6*70
12*33
4'57
0*59
12. 6.40*23
12. 7-45-57
12. 15. 20*31
12. 15. i6'og
10. 51. 11-13
11. 5. 1*70
ii. 9.46*47
n. 14. 3*62
II. 28.41-80
1 1. 28. 41-39
ii. 32. i'i8
11. 34. 59*78
11. 36. 34*11
n. 39. 18*49
11.41. 6*95
12. 15. 15-88
55-60
41-84
23-15
4"77
18-92
58-21
59-82
177
3*80
25*48
5 6 '33
20'6l
24-44
5473
22-58
41-90
10*42
50*69
56-3?
45*80
3-20
29*44
30*66
33'4S
6*0 1
4'44
0*33
39-48
44-90
33' 6 3
56*96
36*12
22*64
4 ''97
10*51
3i'73
32*05
18*29
6*24
12*23
4-5i
0*58
39^5
45-27
37'5 6
10*83
1*72
46*12
3'43
30*94
30-53
0*92
5978
3377
18*45
6-46
34-30
5*98
52-21
29*23
9*90
9*90
I2'1O
14*OO
6*78
30*94
34*98
4*66
32-92
52-27
2O'8o
1-14
6*78
56-17
13-59
39*68
39*68
4379
16*44
14*70
10*84
4996
55-35
44'77
4477
5*21
46*34
32*89
52*24
20-77
40-29
40-29
28-48
16-43
22*50
14*67
10*81
49'95
55-34
43'9
33'99 43'9
20-76
1173
56-14
! 3'55
I 40*60
; 40-60
10*79
9*82
43'76
28*47
, 16*42
49-62
49-63
49-59
49-70
49-69
-48*31
49*92
49*67
49*80
-49*65
-49'55
-49*67
-49*46
-50*07
-49*66
-49-63
-49-62
-49-63
-49-6 r
-49-76
-50-98
-49*66
-49'57
-4974
-49-49
-49'52
-49'55
-48*86
-49*06
-5'75
-49*78
4975
4973
4974
51*44
51*76
-49*81
-49*81
49'73
49*84
4977
50*00
49'93
-53*66
50*09
-50*07
-49'99
-49-98
-49-88
-5'34
-49'93
-49'95
-49'96
-50*01
-49*89
-50*04
-50*84
Paris.
49-62
49-63
49'59
49-70
49-69
49-67
49-80
49-65
3 Comte
Piazzi XIII. 27
19 Canum Venaticum.
20 Canuin Venaticum.,
23 Canuin Venaticuin.
Piazzi XIII. 71
PolaiisS P
W 9
Polaris S.P. ,
Polaris S.P. .
Paris.
-49-56
-49-68
-49*66
-49-63
-49-62
-49-55
-49'55
-49-63
-49-61
49*66
-4974
-49'49
-49*52
-49'55
14 Coma;
21 Coma;
)3 Canum Venaticum
230011193
9 Canum Venaticum
Grooiubridgj 1919
30 Comae
31 Comas
35 Coma:
o Canuin Venaticum
2 Ursae Minoris S.P
14 Canuin Venaticum
15 Canuin Venaticum
17 Canum Veuaticum
Piazzi XIII. 27
19 Caiium Venaticum
20 C.uium Venaticum
23 Canum Venaticum E
PolarisS.P E
Polaris S.P W
Paris.
-4979
-49-76
-4974
-4975
-49*81
-49-81
-4973
-49*84
-4977
-50*00
-49'93
Bradley 1672
21 Comae '
/S Canum Venatieum
Groombridge 1919
30 Comae
31 Comae
35 Comae
a Caiiuin Venaticum |
2 Ursae Minoris S.P
14 Canum Venaticuin '
.17 Canum Venaticum
8 Com* !
Piazzi XIII. 27 '
20 Cauum Veuaticum j
23 Canum Veuaticum
PolarisS.P...
Paris.
-50*07 | Bradley 16/2
-49*99 i 14. Comae
-49*98 ; 21 Comae
-49-88 i 3 Canum Venaticum
23 Comae
9 Cmum Venaticum
49*95 j| Groombridge 1919
49*96 30 Comae ,
50*01 ,] 31 Comas ,
49-98 .! 35 Coinie
50*04 , a Cannin Venaticum
'. Ursae Mmoris
14 Canum Venaticuin
W 10
10*080
10*642
8-160
6-359
io'o8o
11*176
10*080
10*392
10*991
13*244
10*080
9*422
10*080
979-
8*585
10*080
9*604
10*080
13; 8. 10-42
13. 10. 8*71
13. 11.59*90
13. 14. 1*28
13. 1 6. 47*80
13. 1 8. 39*00
13.24, 12*46
13. 24!
1 3. 24.
8-21
9*02
12. 22.
12. 26.
12. 29.
12. 30.
12. 34.
12. 40.
12. 45.
12.47.
12.49.
12.52.
12. 56.
22'42
59^5
57*60
50*69
55*61
41*86
23>3
47'97
20*70
19*02
7*56
2. 1-99
6. 4-03
6. 25-80
8-81
0-08
i'34
13. 16.47*93
13.24, 9*51
'3'
'3
13. io.
13.12.
'3
13.24. 13*69
12. 15.
12. 26.
12. 29.
12. 40.
12.45.
12.47.
12.49.
.2.52.
12. 56.
13. 2.
13. 6.
13. 8.
13. 10.
13. 14.
13. 16.
13.24.
18*50
59*69
5 7 '94
42*08
23*76
48-23
21*08
19*22
7'I7
2*34
25*85
10*80
8*91
1*67
48-02
12. 15. 14*29
12. 22. 22'73
12. 26. 59'67
12. 29. 57-81
12. 30. 50*89
12. 34. 55*92
12. 40. 4I*IO
12. 45. 23*62
12.47.48*23
12. 49. 2I*O1
12. 52. 19*16
12. 56. 9*09
13. 2. 2 4 I4
IO-I5
8*61
59-81
1-18
477
38-96
47"5
4375
44-56
20-58
18-94
10*19
11*52
58*08
i 49'33
49'57
49*67
49*62
49*66
49*62
49*63
58*66 -48*39
58*66
58*66
45*09
45*90
49'57
49*67
49-62
49*66
49*62
49*63
22*17
59*06
57-55
50*38
55'5 6
41*86
23*18
4772
20*37
18*92
59-52
9'49
7*88
0*62
5'97
52*20
33-56
58*07
30*80
29*22
10*02
49*60 49*60
49-57
49*67
49*76
49'59
49-66
49*62
49*65
-49*67
-49*76
-49'59
-49*66
-49*62
-49*65
-49-57
-49*70
-49*50
1*82 i I2'io i 4
3* 9 I
25*68
8* 7 I
o'oo
1*25
47-83
43'55
46*78
3575
49*72
14*00 ! 49*91
49*85
4977
49*81
4973
'4975
44*60
18*94
10*19
11*52
58*08
49*70
-49*72
-49-91
-49-85
-49'77
-49*81
-4973
-49-7S
58*95 1-47-83
42*06
23*48
47 '95
20*74
19*10
59'3 '
2*18
2573
10-53
8-82
'"59
47'93
46-93
43*90
9-48
7-87
52*19
33-55
58*06
30*79
29*21
10-30
12-09
35-82
20*58
18-93
11-51
58-07
59-66
-51*85
-49*90
-50*00
-49-87
-49'93
-49-89
-49-95
-49-89
-49*01
-50*09
-49*91
-49'95
-49-89
-50*08
-49-86
-49-90
-50*00
-49*87
-49-93
-49*89
-49'95
-49*89
-50*09
-49*91
-49-95
-49-89
-50*08
-49*86
33-36
22-49
59^9
5779
5'59
55^9
42*14
23*38
47'99
20*69
19*09
0*46
2'02
43-46
32-56
9-48
7-86
o"6o
5^5
52-18
33'54
58-06 :
379 |
29-21
IQ'45
11-09
49-90
49-93 49-93
49-91 I 49-91
49-93 | 49-93
49-99 ; 49-99
49-94
49-96
49-84
49-93
49-90
49-88
-49-96
-49*84
-49'93
-49-90
-49*88
-50*01
49-93
288
TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Star's Name
H
Observed
Transit.
Si
3 S
G a
Star's Name.
.1
p-ti
o
s
Observed
Transit.
H
53 S
gg-
* *
1902 April 24 continued.
ft Comae
Piazzi XIII. 27
19 Canuin Venaticum ...
20 Canum Venaticum ...
23 Canum Venaticum ...
Piazzi XIII. 71
Polaris S.P
w
w
ff
w
w
w
\\ T
Polaris S.P. ,
B.F. 1905...
1902 April 27.
Bradley 1399
Bradley 2993 S.P. .
Bradley 2993 S.P..
47 Urste Majoris ...
51 Ursae Majoris ...
5 Leonis
Bradley 3147 S.P. .
Piazzi XI. 146
f Virgiuis
Groombridge 1841
2 Canum Venaticum .
Bradley 1672
12 Comae
13 Comae
21 Comae
ft Canum Venaticum.
1902 April 28.
Braiiley 1399
Bradley 2993 S.P.
Bradley 2993 S.P..
33 Leonis Minoris .
35 Leonis Miuoris .
41 Leonis Minoris .
42 Leonis Minoris .
44 Leonis Minoris .
46 Leonis Miuoris .
54 Leonis
47 Ursse Majoris...,
51 Ursae Majoris....
Bradley 3147 S.P.
Piazzi XI. in
59 Ursse Majoris...,
67 Ursae Majoris...
Piazzi XII. 3
4 Comae
Bradley 1672
12 Comae
13 Comae
1902 May 1.
Bradley 2993 S.P
35 Leonis Minoris
37 Leonis Minoris
44 Leonis Minoris
i|/ Ursse Majoris
5 Leonis
v Urste Majoris
Bradley 3147 S.P
Bradley 3147 S.P
Bradley 3147 S.P.
92 Leonis
{ Virginis
Piazzi XII. 3
4 Comae
2 Canum Venaticum.
Bradley 1672
12 Comfe
13 Comse
W
W
ll
E
E
B
K
B
E
W
W
w
W
W
w
10*080
E 10 8-041
E 9 10-080
13. 7. 10-69
13. 10. 8-92
13. 12. O'I3
13. 14. 1*40
13. l6. 48-07
13. 1 8, 39'2i
13. 24. 18-85
13.24. 17-29
i3-47-4 2 '4 2
8-658 10. 15. 39-02
8-355
7-205
io'o8o
8-627
io'o8o
io"o8o
9-882
io'o8o
10-141
13-017
12-430
lo'oSo
10-402
10*080
10-175
io'o8o
12-896
io'o8o
6-560
10*137
12-768
io'o8o
io'o8o
10-149
io'o8o
10. 21. 37-98
10.54. 18-75
to. 59. 24-43
11. 9. I4'3'
11.33.51-56
11.38.45-99
11.40. 34-92
11. 52. 32*20
12. II. 32-99
12. 14. 17-52
" -7- 55'37
12. 20. 44*14
12. 26. 27-58
12.25.25-35
s
10-46
8-88
O'lO
''37
48-03
39' 2 4
49'94
49-30
42-26
5'47
24*20
21-08
18-19
2379
13-18
57-18
45-48
33'S 1
31-64
3 2 '47
54'95
54'4
43'>7
26-57
24-86
io. 15. 39-98 ( 52-40
io. 21. 40-18 , 2i'66
io. 21. 43-61
10. 26. 37-72
io. 31. 4-12
io. 39.25-73
io. 40. 45-22
io. 44. 50-95
io. 48. IO'ID
10.50.38-95
10.54. '8-73
10. 59. 24-45
11.28. 21-82
11. 31. 29-19
11.33.27-44
11.57.28-35
12. 6. 8'oi
12. 7 . 13-52
12. 14. 20"o6
12.17.55-59
12. 18.44-33
IO. 21. 44*48
10.31. 4*47
10. 33. 32*93
10.44. 5'' 2 9
11. 4. 29*51
ii. 9. 14*80
ii. 13. 31*95
1 1. 28. 25*97
ii. 28. 21*05
11. 28. 24-78
11.36. 2-34
"4-35'35
12. 6. 8-43
12. 7.13-96
12.11.33*53
12. 14.22*53
12. 17.55*96
12. 19.44*61
24-83
36-91
3'45
24-65
44-36
50-01
9'35
37'9>
18-21
23-85
57-28
28-21
27-03
27-91
7-02
12-48
0-57
54'55
43'3
20-58
18-92
10-18
11-51
58-07
49'3 2
0-05
0*05
52-31
337
6-26
6-26
1-04
6-69
56-10
41-48
28-43
16-39
'4'55
'5'44
42-18
37'3"
26-06
9'47
33'5
6-50
6-50
'973
46-26
7'47
27-18
32-83
52-17
20-71
I'02
6-67
41-76
10-93
977
10-75
49-91
55'3
4'77
37-30
26-05
26-55
3"So
32-12
50-36
29-16
,3*67
31-17
2*22
57*66
1*03
1*23
33'93
7'45
12*94
32*99
1-07
54'94
43-60
7' 2 3
46*21
14-48
3278
1 1*61
56-06
13-46
42-58
42-58
42-58
4370
16-36
49*89
55*28
15*40
40*61
37*28
26*03
Paris.
-49*88
-49-96
-49-92
-49-86
-49-96
-49-92
-49-89
-49' 2 5
-49'95
-16-77
-17-94
-14-82
-17-15
-17-10
-17-08
-15-70
-17-05
-17-12
-17-09
-17-03
-12-77
-17-09
-17-11
-17-10
-17-03
-18-90
-15-16
-17-18
-17-19
-17-18
-17-18
-17-18
-17-18
-17-20
-17-19
-17-18
-15-52
-17-28
-17*26
-17-16
-17*1 1
-17-18
-18-80
-17-25
-17*25
-19*32
>7'59
17-64
-17*58
'7'55
17-61
-17*71
19*64
15-08
-18-45
'/53
-<7'57
-17*56
17*66
'7'59
20*46
17-66
'7'57
-49*88
49-96
49*92
-49*85
49'95
49-91
49-94
Piazzi XIII. 235
9 Bobtis
Piazzi XIII. 316....
d Bobtis
Groombridge 2089...
A Bootis
Groombridge 2100.,
/ Bootis
p Bootis
Greenwich.
17*16
17-11
17-08
17-05
17-12
17-09
17*03
17-09
17*11
17*10
17-03
23 Comae
9 Canum Venaticum .
30 Comae
31 Comae
2 Ursae Minoris S.P. .
2 Ursne Minoris S.P. ...
14 Canum Venaticum .
1 5 Canum Vnaticum .
17 Cauum Venaticum .
ft Comae
Piazzi XIII. 27 ,
19 Canum Venatioum ,
20 Canum Venaticum .
23 Canum Vi'iiaticum .
Polaris S.P. ..
Polaris S.P.
Greenwich.
-17-19
-17-20
-17-19
-17*19
-17-19
-17-19
-17-21
-17-20
-17*19
-17*28
-17*26
-17-16
-17*11
-17*18
-17-25
-17-25
14 Comae
ft Canuin Venaticum...
23 Comae
9 Canum Venaticum...
31 Comae
2 Urste Minoris S.P. ...
3 Comae
Piazzi XII. 27
20 Canum Venaticum .
23 Canum Venaticum .
Groombridge 1986
Polaris S.P. ..
Polaris S.P
25 Canum Venaticum .
i Bootis
B.F. 1905
Piazzi XIV. 235
9 Bootis
1 1 Bobtis
Piazzi XIII. 316
d Bootis
Groombridge 2089
Greenwich.
-17*60
-17*65
-'7'59
-i7'55
-17*61
-17*71
-"7'53
->7'57
-17-56
-17-66
-17*59
-17*66
-'7'57
14 Corns 1
21 Comie
ft Canum Venaticum..
23 Comae
9 Canum Vennticum...
2 Ursae Minoris S. P. ..
2 Ursae Minoris S. P. ..
Piazzi XIII. 27
20 Canum Veuaticum
Polaris S.P
Polaris S.P
i Bobtis
Groombridge 2043 .
B.F. 1898
B.F. 1905
9 Bobtis
n Bootis
A Bobtis
Groombridge 2100 .
10*080
7 10*080
'
9| ,,
8
io ' 8-480
10 6-250
7 io'o8o
5 ' .,
io 10-398
h m s
13.49. 36-43
13.52.58-48
H- 4-53''5
14. 6.48*55
14. ii. 18*82
14. 14. 43-82
14. 16. 38-97
14. 22. 46-73
14. 28. 29-11
12. 30. 1 8 -74
12.35.23*44
12.44. 5''55
12. 47. l6'02
> 2 - 55-47'5 2
11.55.44-11
13. i. 29-88
13. 5.31-81
'3* 5-53'5 2
13. 7. 38*60
'3- 9-3 6 '57
13. ii. 27-84
13. 13. 29*18
W io 10-885
10.080
7*871
10*080
''S35
11-341
10*080
10*080
8*954
5'54
10*080
10*628
11*197
10*080
j- j- y
13. 16. 1576
Ij. 24. 11-15
13. 24. 20-78
12. 21.
12. 29.
12. 30.
12.34.
12.47.
12.55.
13. 7.
13. 9.
13. 13.
13. 1 6.
13.19.
13.24.
13.24.
'3-33-
'3- 3 6 -
'3-47-
13.49.
13.52.
-3-57-
14. 4.
14. 6.
14. io.
50*80
2 5'53
18*95
23*64
16-26
46-43
38-78
36-71
29*31
15*83
47*86
17*14
28*22
26*81
20-54
10-18
4-28
26-39
4"6o
20-79
16-55
46-45
12.21.51-13
12. 26. 28-03
12.29.25-95
12. 30. 19*29
12. 34. 24'IO
12. 55.46*12
" 2 - 55-45'59
"3- 9- 37'7
13. 13.29*69
13.24. 15*34
13.24. 25-99
13. 36. 20-88
13.42.25*11
13-44- 34'35
'3-47- i'55
13. 52. 26*74
'3-57- 4'9 6
14. 14. 1 2*00
14. 16. 7*00
36-18
58*21
53''5
48*25
18*77
43' 6 7
38-87
4 6 '37
28*88
17*68
22*93
50*62
15*09
29*91
26*77
29*16
31*18
52*89
37-65
36*00
27*30
28*63
15*19
14*16
22*84
49*80
25*02
17-83
23 ii
15*27
2 7'45
37-80
36-15
28*77
15-27
47*18
-4'55
24-68
26 13
19-37
9'45
3'35
2 5'43
3*63
20*42
15-52
45'97
50*15
26*98
25*44
18*19
2 3'57
28*02
2 7'49
36*5,
29*14
'573
2 5'43
'974
24*51
33'5'
9-82
25-80
4-01
11-30
6-42
46-18
8-25
3'*5
5^37
28*96
5376
48*86
5 6 '44
38*92
3 2- 53
7-83
0*59
5*92
58-04
11*03
20*57
18*91
11-50
58-06
29-96
1-58
1-58
8-96
2-23
52-32
46*19
8-27
46-46
3-26
48*39
28-97
32-51
9'44
7-80
0-57
5-90
11-42
1 1-42
18-89
11-48
2-60
2 '60
2-23
6-98
'5 '99
52*32
8-27
46*47
5379
48*89
-50*00
-49-96
-49*90
-49*S8
-49-81
-49*91
-50*01
-49'93
-49-96
0-59
5 '93
33'53
58-05
10*89
10*89
12*08
13*98
35*81
20*57
18*91
10*17
11-50
58-06
0'22
17-09
17-00
17-09
17*04
19*02
-15*88
-17-08
-17-20
-17-08
-17-08
-17*09
-17*13
-17*13
-17-13
-'3'94
49-99
49'95
49-89
49-87
49-80
49*90
50*00
49-92
49'95
-17*09
- 1 7 *oo
-17-09
-17-04
-17*07
-17-19
-17-07
-17*07
-17*08
-17-12
-17-12
-17*12
0*22 22*62
-17-27
-17-19
-17*24
-17-19
-16-42
-17-23
-17*24
-17*27
-17*21
-17*22
-12-97
-17-27
-17-19
-17-24
-17-19
-17*23
-17*22
-17*23
-17*26
-17-20
-17-21
23-10
17*17
17*14
17-13
17*16
17*16
17-17
17*16
17-16
17-13
17-12
17-15
17-15
17-16
17-15
17-12
17*00 1 6'99
-17*64
-'7'54
-17*64
-17*62
-17*67
-i 6*60
- 16*07
-17*62
-17*66
-13*13
-22*83
-17*51
-'7'53
-17-52
-17*50
-'7'53
-'7'54
-17-51
-'7'53
-17-64
-i7'54
-17-64
-17-62
-17*67
-17*62
-17*66
-17*50
-17*52
-17*51
->7'49
-17-52
-7'53
-17*50
-17-52
STAR-TRANSITS OBSERVED BY MR HOLLIS WITH TRANSIT C., AND RESULTING CLOCK ERRORS.
289
Star's Name
Position.
Xo. of Wires. 1
K.A.
Micrometer.
Observed
Transit.
Corrected
Transit.
Tabular
Apparent
jt.A.
Clock
Apparently
Slow.
!!*
5 ||t
a"
a
Star's Name.
. to
So. of Wires.
R.A.
Micrometer.
Observed
Transit.
Corrected
Transit.
flL*
Clock
Apparently
Slow.
>vB
^^ "~a
!
S .*=
&3o5
<a
1902 May 2.
67 Ursa? Majoris
E
E
E
E
E
E
E
W
W
W
W
W
W
W
W
W
W
W
W
W
9
9
9
9
IO
9
9
8
6
9
9
9
1 1
8
5
9
9
9
IO
IO
6
7
9
9
9
4
IO
IO
9
9
9
8
7
9
r
10*080
10*099
10*080
10*080
12-376
lO'oSo
10*080
8-909
13-553
10*080
11
8*898
10*080
-i
h m s
1 1. 57. 28-84
12. 6. 8-50
12. 7.13-97
12. II. 33'6o
12. 14. 23-64
12. 1 9 . 4472
12.21. 51*15
12. 29. 25*96
12. 30. 19*32
12.34.23*93
12.47. i6*59
12. 48.49*54
12. 55.48*68
13. 7.39-20
12. 44.52-41
12. 47. 16*85
12. 48. 49*82
12. 51. 47'66
12. 55. 49*07
12.55.48-89
3- 5-54-34
'3- 7-39-45
'3- 9- 37'46
13. 13. 29*86
13. 16. 16*45
13.18. 7-68
13.24.27*07
13. 24. 17*06
13.33.27*52
13. 36. 21*28
13.42.25*44
13.43. 7*19
'3-44- 3479
13.47. 10*95
3
28-34
I2'9I
33-01
1*50
50*I3
2 5'43
18*21
15*61
48*39
3o'55
38*23
5 1*47
15-91
48*71
47*06
30*63
30-45
5375
38*52
36-93
2 9'35
15*92
7-30
26*28
17*22
26-82
20*12
24*82
6*57
34-03
10*20
s
10*70
49-88
55' 2 7
15-39
40*21
26*02
32-50
779
0-56
5-89
58-02
30-77
11-56
20-56
33-5
58-01
30-76
29*16
11-71
11-71
3578
20-55
18*88
11*47
58*03
49-28
3"35
3"35
8-95
2*23
6'97
4874
!5'99
s
17-64
17*60
17*64
17*62
21*29
17-65
17-63
17*64
-17-65
I7'49
I7-59
-17*62
-18*99
17-67
17*97
17-95
17-90
18-92
-18*74
17-97
17-97
18*05
17*88
-17-89
18*02
-22*93
-13*87
-17*87
-17-89
-17-85
-17-83
18-04
17-88
Gl'L' 1
s
I7*6j
17*60
17-64
17-62
17-65
17*63
17*64
17-65
17*49
-17-58
17-61
17-66
Grecr
17*96
-17*89
17-94
-17-89
17-96
17-96
18-04
-17-87
17-88
18-01
17-86
17-88
-17-84
-17-82
18-03
-17-87
tvivh.
Piazzi XIII 27
W
W
W
W
W
E
E
E
E
E
E
E
K
E
E
E
E
E
E
E
E
E
E
E
W
W
W
W
W
W
\v
W
E
E
9
9
9
9
IO
10
6
9
9
6
9
9
9
9
9
9
8
8
9
9
9
9
9
9
9
8
8
9
9
9
9
IO
10
9
r
I0*o8o
j
1 1
9787
IO*08O
||
ft
|I
io'o8o
tt
10*080
10*346
12-597
io'o8o
h m s
13. 9.37-16
13. II. 28-35
13. 13. 29-68
13. 16. 16*25
13. 24. 26*25
13- 2 4- 14*34
13. 30.46*36
13- 33- --7-38
13. 36. 21*21
13.42.25-38
13.43. 7-06
13.44. 34-62
13. 47. lO'Sg
13-49- 4'93
13.49. 5-00
13. 52.27-18
14. 4. 2I-62
14. 6. 17-43
14. 10. 47-35
14. 14. 12-48
14. 16. 7-37
I 4 . 22. 15-70
14- 2 7- 57'79
14. 30. 46-28
14.45. 36'86
14. 52. 39-05
14. 56. 12-48
14. 58. 10-39
15. o. 36-21
15- 3---i"3 2
15- 4.31-4I
15. 8. 41*19
15. 8.44-08
15. 16. 26-63
s
36*58
27*80
29*12
15*67
26-62
15*66
45*64
26*63
20*OI
24-71
6*39
33*71
10*09
3^5
4*06
2621
2 I '2 1
I6-39
46*84
11*75
6-76
14*52
56*90
45-37
36*24
38*56
11*91
9-38
35' 2 5
20*30
30-43
9'67
12-08
25*72
8
18*89
10*15
11*48
58*04
2*96
2*96
27-85
8-95
2-23
4873
i5'99
52*32
46*19
46*19
8*27
3' 2 7
58*40
28*98
5379
48*89
56*49
27*38
18*44
20-72
53'99
51-53
>7'37
2-41
12-50
52-63
52-63
7-8.
s
17-69
17-65
17-64
-17*63
23-66
12*70
17*79
17*68
-17-78
17*74
17-66
17*72
1777
I?'? 6
-17-87
17*94
17*94
17-99
17-86
17-96
-17-87
18-03
17*93
17*99
17*80
-17*84
17-92
-17-85
17-88
17-89
17^3
17-04
19-45
17-91
s
17*68
17*64
17-63
17*62
-1778
17*67
17-77
17-73
17*65
17*71
17-76
1775
17*86
17-93
17-93
-17-98
-17*84
17-94
17-85
18*01
17*91
I7-97
-'778
17*82
17*90
-17*83
17-86
Piazzi XII. 3 .
4 Comae
20 Canum Venaticum
2 Canum Venaticum
Bi'fiJlev 1672
Polaris S P
13 Comae
Polaris S.P ...
14 Com*
Canum Venaticum
Piazzi XIII. 136
25 Canum Venaticum
i Bootis . . ,
23 Coma?
9 Canum Venaticum
31 Comae
35 Comae
li.F. 1898
H F. I qo <
z Ursa? Minoris S.P
-S Comfe
Piazzi XIII., 235
^wich t
Piazzi XIII 235
1902 May 3.
30 Con:te
31 Coma;
9 Bootis
35 Comae
Piazzi XIII 316
a Canum Venaticum
d Bootis
2 UrsjE Minoris S.P
2 Ur>B Minoris S.P
A Bootis
17 Cauum Venaticum
W
W
W
W
W
W
W
E
E
E
E
E
E
E
/3 Comae
/ Bootis
Piazzi XIII. 27
p Bi>otis
20 Canum Venaticum
i IT Bootis
Piazzi XIII. 71
Polaris S.P
B F 2044
Polaris S.P
40 Bootis
ca Bootis
\|/ Bootis
25 Canum Venaticum
c Bootis .
-17*87
17*91
-17*89
i Bootis ^
Groombridge 2043
Groombridge 2047 ... .
B.F. 1898
B.F. 1905
1902 September 21.
\ Ursre Minoris W 10
9"3 2 4
9-573
8*122
10*080
),
) -
tt
ft
8*966
10*080
10-245
8-398
10*079
i
10*361
h m s
19. 19. 38*68
20. o. 33*95
20. O. 33'9I
20. 12.39*97
20. I 4 . 52*74
20. 1 6. 46*43
20. 1 8. 46-95
2O. 21. 25-12
20. 30. 9*95
2 o. 33- 5^7
20. 37. 9*16
2O. 40. 41*69
22. 21. 25*07
22. 28. I 1*64
22. 31. 11*13
22. 31.3576
19- '9-45-41
19. 19.41*07
19. 36. 18-83
19. 38.40-34
19.40.48*37
19. 42. 46*30
19-47- 9'46
19.49.21*90
19-56- 2 3'5 2
20. 0.34-15
s
55' 2 5
18-22
20*94
39*70
5 2 '54
46-25
4677
24*83
973
8*92
4i-45
28*50
11*53
11*02
54^0
53-14
1 8*68
40*17
48*18
46*10
9-28
21*64
2 3'33
22*29
51*60
19-40
38-68
51-41
45-21
4575
23-84
8-70
6 '20
7-88
40-33
27*51
10*58
10*04
34*82
5' 2 3
50*23
17*72
39*21
47'3o
45*21
8*44
20*79
22*50
20*55
s
- 3-65
-f- 1-18
- 1*54
I'O2
1*13
1*04
I'O2
'99
1*03
0*93
1*04
'99
'95
0*98
0-83
4" 2 7
2*91
0*96
0*96
0*88
0*89
0*84
0*85
0*83
1 74
Pa
At oh.
s
ris.
W
W
W
W
W
W
W
W
W
W
W
W
W
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
9
9
9
9
9
9
5
9
9
8
9
8
IO
IO
7
7
8
10
9
9
9
9
9
9
6
6
9
8
r
io'o8o
J I
)t
1 1
9*710
14*108
10*080
7-969
10*080
11
1 1
>J
10*124
U m a
22. 34. 56*96
22. 37. IO'6l
22.39.48*50
22. 41. 53'8o
22. 45. 21'jO
22. 49. 42*62
22. 59. 6*54
23. 2.25*42
23. 6. 0*99
23. 8.23*84
23. ii. 4*29
23. 13.4976
23.28. 13*52
23.28. 17*47
23.41. 16*44
23.49. 12*15
20. O. 28*07
20. 12. 39*86
20. 14. 52*52
20. 18.46*88 '
20. 27. 20*25 '
20. 30. 9*94 ;
20. 33. 6*42
20. 40. 41*62 i
21.23. 9-25
21. 30. 51*26
21. 48. 41*20
s
56*84
10*50
48*40
53-57
21-27
42-51
6-33
25-20
0*91
23*64
4*09
49*66
18*30
51*33
16*31
43"'9
1 1*96
18*97
39'55
52*26
46*64
19*99
9-67
7*11
41*34
775
51*01
40*90
s
55^7
9"6o
47-48
52*63
20*39
41*62
24*40
59*92
22*86
3*28
48*83
19*44
19*44
15*40
42*18
10*96
20*55
38-67
51*39
4573
19*09
8*69
6*08
40*32
7-17
50-05
39-94
- 0*87
0*90
0*92
0*94
0*88
0*89
0*85
0*80
0*99
0*78
0*8 1
0*83
+ i-'4
1-89
0*91 \
I'OI
Too
+ 1-58
0*88
0*87
0*91
0*90
0*98
1*03
I '02
0-58
0*96
0-96
Ato*.
8
0*87
O'90
0*92
'94
0-88
0-89
0-85
0-80
0-78
0-8 1
0-83
0-91
I'OI
Too
0*87
0-86
0-90
0-89
I '02
0-96
0-96
Groom briil g 1119 S.P
W
E
E
E
E
E
E
E
E
E
E
W
W
W
W
22
E
W
W
10
10
9
8
8
8
9
9
7
9
9
10
9
5
9
IO
IO
9
9
9
9
9
S
9
IO
12 Lacertse . ,
Groombridge 1119 S.P
24 Vulpeculse
1*02
-I- 1*13
1 "04
1*02
'99
I-0 3
1*12
0*95
0*98
0*83
Pai
0-95
0*87
0-88
- 0*83
0-84
0-82
13 LacertcB
A. Pegasi
36 Cygni
Groombridge 3140
y Cygni
Lalamle 39329
47 Cygni
W B (2) XXIII 95
Bradley 2701
49 ^-yg n i
52 Cygni
Bradley 2993
Groouibridj-e 3804
Piazzi XXII. 159
8 Lacei'ta-
1902 September
1&
Groombridge 1119 S.P
24 Vulpeculie. , ....
A Ursse Minoris
14 Cvgni
Groombridge 2912 W
15 Cygi
W
W
W
W
W
W
X Cygui
19 Cygni
13 Vulpeculae ..
Pi-izzi IX 37 S P
25 Cygui
Groombridge 1119 S.P
16 Frgnri .
290
TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Star's Name.
Observed
Transit.
11
3
Star's Name.
* -Hi
o I 8
Observed
Transit.
, .,
III
sas-s
SB*
1902 September 22 continued.
Piazzi XXI. 339 1 E
Groombridge 3655 1 E
i Pegasi I E
TI Pegasi ' E
ir 2 Pegasi E
Piazzi XXII. 36 E
i Lacertae E
Piazzi XXII. 65 E
Bradley 1399 S.P E
Bradley 2993 1 E
Bradley 2993 | E
i
9 10*080
9
i
9
9
9
9
9
lo
10
TO
6792
10765
16-466
1902 September 24.
12 Laceitse
13 Lacertae
X Pegasi
Groombridge 3919....
Bradley 1508 S.P
o Andromedse
ft Pegasi
W.B. (2)XXIU. 95.
61 Pegasi
67 Pegasi
Bradley 3147
Bradli-y 3147
K Andromedae
78 Pegasi
Groombridge 4153 .
Groombridge 4159 .
<!/ Pegasi
85 Pegasi
Groombridge 4219..
Bradley 3212
4-928
io'o8o
W ] 10 11-237
E
13-438
io'o8o
E; 9
1902 September 26.
16 Pegasi
Groombridge 3655 ...
i Pegasi
! Pegasi
c 2 Pegasi
I Lacertae
Piazzi XXII. 65
Groombridge 3750
Bradley 2993
Bradley 2993
12 Lacertae
13 Lacertae
A. Pegasi
Lund 10936 ........... ,
o Andromedae .........
Pegasi ...............
56 Pegasi ................
6 Androraedte .........
W.B. (2) XXIII. 95.
61 Pegasi ...............
9 Andiomedae .........
T Pegasi ................
Bradley 3147 .........
10-080
8-847
6-924
to'oSo
1902 September 29.
A Ursae Minoris..
\ Ursae Minoris..
\ Ursae Minoris.
Berlin B. 7685.
Lalande 39329.
40 Cygni
4* Cvgni
44 Cygni
f Cygni
''359
9-911
h m s
21. 51. 54-08
21. 59. 4-62
22. 2. 32-07
22. 4.58-28
22. 5. 43-24
22. 9. 45-50
22. H.47'7
. 14.43-57
22. 15. 21*98
22. 21. 26-43
22. 21. 26-69
I0'o8o
22.37.
22.39.
22. 41.
22.49.
22. 5 2.
22. 57.
22. 59.
23. 8.
23. II.
23. 20.
23. 28.
23. 28.
2 3-35-
23.39.
23.46.
23.49.
23. 52.
2 3-57-
2 3- 59-
o. i.
10*42
48-34
53-58
42-46
7' 2 3
30-00
6-48
23-85
4'23
8-20
13-82
15-86
40-4-
9'o6
43-21
11-94
51-27
8-59
40-22
37'7
21. 48. 40-76
21. 59. 4-08
22. 2. 31-69
22. 4.5778
22. 5.42-81
22. II. 46-58
22. 14. 43-18
22. 17. 44-01
22. 21. 22*39
22. 21,
22. 37,
22. 39,
22. 41,
22.45,
22. 48,
22. 57
22.59
2 3 . 2
23. 6
23. 8
23.11
2 3-i3
23.15,
23. 28,
20-94
1O'2O
48-18
53'39
2 I "2 1
477'
2 9'75
6-29
25-21
2-50
23-62
4-04
4 9 '44
52-09
11*88
19. 19. 50-8
8-940 19. 19. 48-84
6-849 '9- '9- 49-17
20. 20. 48-95
20. 20. 18-40
20.23.54-17
20.25.33-87
20. 27. 13-69
21. 8.43-95
Puris.
537 6
i 4'4'
31-76
58-00
42-97
45-26
46-82
43-32
19-83
28-22
28-48
10-37
48-31
53'3 6
42-41
4-85
29-98
6-30
23-68
4-05
8-07
20-71
21-83
40-40
8-84
43-11
n'Si
51-01
8'35
40" I 2
36-85
40-49
4-03
31-42
57^8
42*61
46-44
43-04
43'93
2678
io'i6
48-16
53-15
20-98
47'7
29-74
6'og
24-99
0-51
23-44
3-85
49-42
5I-85
19-96
35^7
36-90
48-86
18-31
53'99
33'7
13-52
43-82
52-84
3-40
30-76
56-99
41-98
44-36
45-84
; 42-42
1879
27-40
, 2 7'4
9-58
47-46
52-62
41-61
371
29-07
5-48
22-85
3' 2 7
7' Z 3
I9'33
'9'33
39'5'
i 7^4
4 2 "i9
10-97
JO'II
7-43
!39' 2 5
35'93
39-90
3'35
3073
56-96
41-94
45-80
4 2 '39
43-34
26-80
26-80
9'57
47-45
52-61
20-37
46-96
29*06
5 '47
2 4"39
59"9'
22-85
3-27
48-82
51-28
19-13
40-05
40-05
40-05
54-21
23-70
59-42
39-I4
18-95
49-32
0-83
4-08
3-I5
2-82
5-35
S'39
5'43
5 '44
5'43
5'5
0-92
i 'oi
I '00
I "01
0-99
0-90
0-98
0*90
1-04
0-82
I -08
'79
- 0-85
"74
o'So
1-14
0*91
0-82
0-83
0-78
0-84
- 1-38
2-50
0-89
0*90
0-92
0-84
o'go
0-92
0-87
0-92
"59
0*68
0*69
0*62
0*67
0*64
0*65
o"59
0-75
+ O'O2 i
07l
'54
0*6 1
0*74
0*68
0*62
0*60
0*60
0*59
0-58
o"6o
0*92
i'oi
I'OO
I'OI
'99
0-90
0-98
0-90
a Andromediu
B Pegnsi
56 Pegasi
6 Andromeda
W.B. (2) XXIII. 95
61 Pegasi
9 Andromeda;
Pegasi
W
w
\v
w
w
w
w
w
Cambridge 13985 W
Bradley 3147 W
Bradley 3147 E
T i h m a
I0'o8o 22. 57. JO'20
22. 59. 6'66
,, 23. 2. 25-60
523. 6. 0-93
23. 8.23-95
23. II. 4-32
23. 13.49-82
2 3 . I S . 52-43
23. 10. 16-07
9-176
10 14-4
Paris.
0-79
0-85
0-74
0-80
0-91
0-82
0-83
0-78
0-84
0*89
0-90
0*92
0-84
0-90
0-92
0-87
0-92
a Aiidromedse
22 Andromedse
23 Andromedae
Piazzi 0. 13
Bradley 1672 S.P..
28 Andromedae
Piazzi 0. 103
Bonn 654
v Andromedse
W.B. (2)0. 1172.
H Andromedae
2 Ursre Minoris....
ft Andromedae
T Pisciurn
u Piscium
47 Andromedae....
Polaris....
1C
E
E
E
I 1
IE
w
vr
W
w
w
\v
W
w
w
w
Polaris
io'o8o
7'5'4
io'o8o
to'oSo
9-784
io'o8o
11-033
11-792
Paris.
" /t
0-68
0-58 i
0-67
0-68
o'6i
0-66
0-63
0-64
0-58
0-58
0-70
0-53
o"6o
0-74
0-68
6-62
0*60
o"6o
0-59
0-58
o'6o
"57
Bradley 3147 E 9 '3'347
Bvadley 1672 S.P..
Bradley 16728.?..
T Andromedae
5 Andromedae
Piazzi 0. 148
v Andromedae
W.B. (2)0. 1171..
It, Andromeda
2 Ursse Minoris
41 Andromedae
3 Andromedse
r Piscium
Piscium
Polaris
Polaris
Polaris
X Andromedae.
Bonn 1434
a Trianguli
10-296
- 6-481
9 10*080
10
11-264
lo'oSo
7-711
9-186
8-827
io'o8o
Greenwich.
5'35
5'39
5'43
5 '44
5 '43
5'5
T Cygni
a Cygni
Lund. 10053
Groombridge 3548.
72 Cygni W
74 Cygni W
75 Cygni W
77 Cygni- W
Bradley 2841 W
Bradley 2851 i W
10*080
I0'6l2
io'o8o
23. 28. 15-44
30-04
6-42
2 5"34
0-78
23-71
4-08
49-66
52-17
15-83
18-93
23.28.18-00 20-57 19-43 1*14
29-08
5-48
24-40
59-92
22-86
3-28
48-83
51-28
14-91
'9'43
I
0-96
0-94
0*94
0-86
0-85
o'8o
0-83
0-89
0*92
o. 3. 24-67
o. 5. 19-34
o. 8. 31-06
o. 9. 32-00
o. 13. 40-98
o. 25. 2-47
o. 27. 44-19
0.43.58-03
o. 44. 30-18
o. 48. 10*83
0. 51.24-29
0.55.41-27
1. 4. 20-14
i. 6. 21*16
i. 14. 10-14
1.18. 9-86
1.24.45-65
1.24.51-93
23.28. 13-41
o. 13. 45-68
o. 13.
0.31.
0.34.
o. 35.
0.44.
0.48.
0. 51.
0.55.
1. 2.
4-
(i.
r
I
I
I
1.24.
-4-
41-33
44-14
10-53
29-29
30-20
10-70
2 4'39
42-14
29-05
20-16
21-13
3 i'oi
49-02
50*21
i. 24.43-59
' 33-33-9 6
1.36.54*63
i-47- 34'74
21. 10. 50-94
21. 13. 32*19
21. 15.25*88
21. 19. 21*64
21. 30. 44*61
21. 32.59*48
21. 36. i8'6i
21. 38. 24-69
21. 39. 8- 5 2
21. 41. 28-23
24-45
19-30
31-89
28-91
2-25
43*96
57'99
30*14
28-99
19-99
20-91
3"73
8-83
IO"O2
5-8 5
33'98
54-62
34'5 6
50-76
32*00
25-70
i7' 2 3
44-50
59-35
18-46
24-56
8-39
28-18
24-22
; 46*38
20*04
20-99
9-95
9-78
4-65
8-48
20-57
29*59
26*93
43^5
10*3 1
29-01
30-10
10-55
24-26
23-60
18-45
30-12
30-99
26-69
1-44
43-22
57-18
29-31
9'93
23*52
46-17
19-27
2O'2I
9"i6
8-95
0-85
0-85
0-83
0*90
2"22
0-8 I
74
0*8l
0-83
0-82
0*70
O"2I
77
0-78
079
0-83
+ I'OO
- 2-83
19-13 ! 1*44
26*64 j 2 "95
26*64
43-29
9.63
28*45
29*34
9-95
2 3'54
46*29
28-28
19-30
20*23
29-99
6-40
6-40
6-40
33-34
54'7
34"ii
56-17
37H4
3 1 '20
23-24
49-95
4-89
24-00
30-07
13-83
33' 6 3
0-29
0-66
0-68
0-56
0-76
0*60
0*72
>-'5
0*71
0*69
0*68
0*74
2*43
3*62
o"55
0*64
0-55
o"45
5-44
5'5
6'oi
5'45
5'54
5'54
5-5i
5'44
5'45
0*96
0-94
0-94
0-86
0-85
o'8o
0-83
0-89
0*92
0-85
0-85
0-83
0-90
0-8 1
0-74
o-S i
0-83
0-82
0-70
077
0-78
0-79
0-83
0-66
o-6S
0-56
0-76
o'6o
0-72
071
0-69
0-68
0-74
0*65
0-56
0-46
5'4i
5 '44
5'5
5'45
5'54
5'54
5"5i
5'44
5'45
STAR-TRANSITS OBSERVED BY MR HOLLIS WITH TRANSIT C., AND RESULTING CLOCK ERRORS.
291
Star's Name.
Observed
Transit.
.s.t: a v .
S S -= a"!
t* -i.~x
September 29 continued.
Bi-aillry 2851 W
1 6 Pegasi W
Piazzi XXI. 339 W
Leiden 9262 W
Groombridge 3655 W
i Pegasi W
Piaz/i XXII. 36 \V
i Lacertic W
Bradley 1399 S.P W
lo'oSo zi. 41. 54-50
21.48.34-42
21.51.47-25
21.56. 675
,, 21.58.57-99
22. 2.25-22
22. 9.38-81
22. II. 40'33
II-470
22. 15. 13-18
1902 October 2.
7 Cygni
47 Cygni
Bradley 2701
75 Draconis
52 Cygni
A Cygni
" Cygni
Groi.iubridge 3351 .
i* Cygni
Lund. 10053
Groombridge 3548 .
Groombridge 3548 .
72 Cygni
75 Cygni
77 Cygm
Bradley 2841
K Pegasi
Bradley 2851
Bradley 2852
14 Pegasi
7 10*080
9
7
10 10*068
9 6 '39 8
9 10*080
9
9 i
9
5
9
7 ,,
20. I 8.
20. 30.
20. 33.
20. 34.
20. 41.
20.43.
20. 53.
20. 55-
21. 10.
|I. 15.
21. 19.
40-31
3-26
0-30
22-91
34'3
33'30
29-12
45'97
50-81
25-84
19-29
21. 19. 19*80
21. 30.44-65
21. 36. 1870
21. 38. 24-72
21. 39. 8>8
21. 40. 10*70
21. 41. 28*32
21.41.54*54
21. 45. 28*90
1902 October 8.
Groombridge 1119 S.P W 12 10-865
Groombridge 1119 S.P
36 Cygni
Lalande 39329
44 Cygni
47Cygni
Bradley 2701
75 Draronis ..........
56 Cygni
32 VuIpecnUe
v Cygni
Groombridge 3351
I Cvgni
Piazzi XXI. i
Piazzi IX. 37 S.P. .
Bradley 2841
K Pegasi
Bradley 2851
Bradley 2852
14 Pegasi
16 Pegasi
Piazzi XXI. 339....
Leiden 9262
Groombridge 3655 .
i Pegasi
ii 7717
9 io'o8o
7 '
9
9
9 10-917
8 10*080
5
9
9
9
9
9
7
9
0.36*24
20. o.
20. 14.
20. l8.
20. 21.
2O. 27.
20. 30.
20. 32.
20. 34.
20. 46.
20. 50.
20-53-
20. 55.
21. I.
21. 4 .
21.13.
' 21-39-
'21.40.
21. 41.
! 21. 41.
j 21.45.
21.48.
21.52.
21. 56.
21.59.
22. 2.
32*88
46*69
41-11
19*16
14-44
4-03
59-62
22*33
347
21-82
29-89
46*78
20*74
28*37
6-12
9-21
11-54
29*10
55-38
29*65
35-34
48*23
7*64
58*70
26*14
L902 October 9.
49 Cygni W
A Cygni W
76 Dniconi-* W.
14 Pegasi \V
16 Pegasi W
Piazzi XXI. 339 W
Leiden 9262 | W '
T! Pegasi | W ;
T 2 Pegasi ' W
Piiizzi XXII. 36 |W|
i Lacertee I W !
Bradley 1399 S.P W.
io'o8o ' 20. 37. 3*06
j 20 - 43- 33-98
20. 49. 41 '29
21.45. 29-64
\ 21. 48. 25'2I
I 21. 51. 48'! I
21.56. 7*54
22. 4. 52-30
I 22. 5.37-31
I 22. 9.39-65
,, ; 22. II.4I-2I
io'8o8 ! 22. 15. 17-63
54-'45
34'3 6
47*22
6-67
57-83
25-17
38-69
40'22
'5'49
40*06
3-03
59''9
21-80
34-61
33-06
28-87
457
5'57
25-60
16-49
17-89
44*48
18-51
24'54
8-30
10*55
28-17
54'39
28-74
59-92
39'87
52-78
12-15
3*31
30-70
44*28
4577
19*82
45'5
8*49
477
27*13
40*14
38-60
34-38
51*17
56*12
31-15
22*42
22*42
49*90
2 3'95
30*02
13*78
1 6*06
33*60
59*88
34-22
33-09 140-18
40*18
51*04
45'3 6
46-49
40-92
18-96
14-24
3*83
59*46
22*17
34'5I
21*62
29*70
46-59
20*55
28-18
5'55
9-09
11*39
28*95
55' 2 3
29-50
35''9
48-08
7'5'
58-58
25-99
2-95
33-87
41*17
29*52
25*09
47'99
7'43
52*19
37*20
39'54
41*10
17-52
18*76
8*36
3'97
26*82
39-05
26*09
34'25
51*04
25*14
32*65
9-21.
13-67
1 5 '97
33'5'
59*81
34'' 3
39*76
52*68
12*03
3-16
30*60
7-54
38*46
45'24
34*12
3974
52-66
12'02
56-80
4I- 7 8
44' '5
45*64
21-32
.,
O 5.73
-
Star's Name.
S
-sl
Observed
Transit.
III
6 g.
<
S-Vj
^ =*J *
Greenwich.
SS7
5'5'
5-56
5-48
5-48
5'53
5'59
5'55
4'33
5 '44
5-46
5-58
5'33
5'53
5'54
5'5'
5-46
5'55
5'55
5'93
4'53
5-42
5 '44
5-48
5-48
5'5'
5'43
5 '49
5-48
7-09
7-69
4'55
4 '44
4-58
4-52
4'53
4'S 1
4-65
4'54
4'47
4-55
4'45
4'59
4'47
3-66
4-58
4-58
4-56
4-58
4-63
4'57
4'6o
4'52
4-58
4-6,
4'59
4'59
4-07
4-60
4-65
4-67
4'59
4-61
4-58
4-6.
4'54
3-80
S - 47
5V
5-56
5-48
5-48
5'53
5'59
5'55
Bradley 2993 1 W
Bradley 2993 ' E
i o Lacertje .
12 L:icei*tae.
i 3 Lacertfl-..
\ Pegasi....
,a Pegasi....
Greenwich.
5'43
S'45
5'57
5"53
5'5
5 '45
5'54
5'54
5V
5'43
5 '47
5 '47
5 - 5
5 '42
5-48
5 '47
16 Pegasi I W
Piazzi XXI. 339 J W
Leiden 9262
Groombridge 3655
i Pegasi
T! Pegasi
a-2 Pegasi
Pinzzi XXII. 36
Bradley 1399 S.P
Bradley 2993
Bradley 2993
8 Lacertie
10 Laceitie
12 Licertie
13 Lacertie
\ Pegasi
p. Pegasi
15 Lacertie
Groombridge 3919
Greenwich.
4-54
4'43
4'57
4'5'
4-52
4'53
4-46
4'54
4'44
4-58
4-46
4-58
4-58
4-56
4' 5 8
4-63
4'57
4'6o
4-52
4-58
4-61
**! Pegasi W
T 2 Pegasi* W
I'iazzi XXII. 65 W
Bradley 1399 S.P W
Bradley 2993 W
Bradley 2993 E
10 Lacertie E
13 Lacertre E
\ Pegasi E
15 Lacertae E
Groombridge 3919 E
9 Andromedse E
T Pegnsi E
67 Pegasi E
Bradley 3147 E
Bnidlev 3147 W
if< Pegasi j W
Laliiude 47034 ' W
85 Pegasi W
GroombrMge 4219 W
Bradley 3212 1 W
23 Andromedae : W
Piazzi 0. 13 i W
Bradley 1672 S.P ' W
Bradley 1672 S.P W
Greenwich.
4'6o
4'6o
4-6,
4-66
4-68
4'6o
4-6,
4-58
4'6i
4'54
Bradley 2993.
Bradley 2993
15 Lacertae
o Andromeda
56 Pegasi
67 Pegasi
13 AndromediE
Bradley 3147
Bradley 3147
W.B. (2) XXIII. 907..
o AndromediE
10*627 22. 21. 23-26
13-284
10*080
22. 21. 25-18
22. 34. 50-65
22. 37. 4-38
22. 39. 42-28
22. 41. 47'28
22. 45. I5'O8
10'oSo ! 21. 48.
21.51.
21. 56.
21.58.
22. 2.
22. 4.
22. 5.
22. 9 .
22. 15.
22. 21.
22. 21.
22.31.
22. 34.
22. 37.
22. 39.
22. 41.
22.45.
22. 47.
22. 49-
"'557
10-582
14-420
io'o8o
34'58
47'39
6*78
58-02
25'37
3 6 '57
38-92
15-00
22'1O
23-65
29-49
50-70
4'34
42-18
47'3'
15*11
35'98
36*41
io'o8o
13*766
11-187
'3'33
io'o8o
22. 4.52-43
22. 5.37-40
22. 14. 37-88
22. 15. 18-85
22. 21. I9'97
9
9
8
6
10
10
9
9
9
9
9
9
9
10
10
5 '947
io"o8o
9'375
14-842
22. 21.
22. 34.
j 22. 39-
,22.41.
22. 47 .
I 22. 49.
23- '3-
2 3 . 15.
23. 2O.
23. 28.
' 23- 2.
23- 52.
'23- 54-
23- 59-
; :: I:
o. 9.
I - '3-
o. 13.
20*95
5 1 '43
42*94
48-25
36*65
37-.I
44*46
46*93
2-87
13-98
12*85
45*68
34' 8 4
3''54
2578
26-69
26-17
27-00
I2T48 22. 21. 20-30
14-510
lo'oSo
9'9'5
14-102
io'o8o
22. 21. 21'59
'22.47. 3 6 '5 l
22.57.24-61
I 23. 2. 20-03
J 23. 20. 278
i 23. 22. 24-02
, 23.28. 13-44
'23.28.13-71
23.44.45-21
' o. 3. 19-28
2O'J7 26-29
2I'8l
50-46
4-19
42-07
47''9
14-98
34'43
47-25
6-62
57-82
25-22
51-51
16-05
2O"6l
21-48
29-24
50-46
4-09
4''93
47-12
14-91
3572
26-29
55'9'
9'54
47 '42
52-60
20-36
, 5275
I2'IO
! 3-26
30-67
56-89
'41-87
44-25
20-23
' 25-87
25-8-
3473
55-88
[ 9'5 i
47'4=
; 52-58
20-34
41*10
46-16 41-56
52-30
37'27
3775
1 8 -06
20-52
20-82
51-23
42'75
48-05
36-46
36-92
44-27
4*73
2-67
13-87
13-66
45'53
29'57
2-83
3472
3I-39
25-66
26-57
24-18
25-01
56-82
41-80
42-24
21-13
24-88
24-88
55-82
47'34
52'53
41-04
41-51
48-76
51-24
7-19
'7'95
'7'95
50-13
34-I3
7'45
39-28
35-96
30-17
31-04
27-12
27-12
20-17 24-68
20-78
3 6 '33
24-43
19-86
z"6o
23-84
12-38
12-65
45'03
19*11
24-68
41-02
28-96
24-32
7*19
28*45
'779
'779
49-64
23-63
5'72
4*48
5'45
5'35
5'35
5'4'
5'38
5-40
5'5
5-48
5 '44
5'45
5-38
5*46
5V
4-, 8
5-26
4'39
5 '49
5-42
5-42
5 '47
5-46
5'43
5-38
5-40
4-52
4'53
4'49
3*07
4*06
4'59
4'59
4-48
4-58
4'59
4'49
4'5'
4-52
4-08
4-29
4 "60
4-56
4-62
4-56
4'57
4'5'
4'47
2-94
2'I I
4'5 1
3-90
4-69
4'59
4-61
5'4'
5''4
4'6i
4-52
5'35
5'35
5'4'
5'38
5'39
5 '49
5 '47
5'43
5 '44
5'37
5 '45
5'5
5'49
5-42
5'42
5 '47
5-46
5'43
5'S
5 '49
4'53
4 "49
4'59
4'59
4.48
4'58
4'59
4'49
4'5'
4'52
4-60
4-56
4-62
4*56
4'57
4'5'
4 '47
4-69
4'53
4-46
4'59
4*61
4-61
4'5 Z
292
TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Star's Name.
Observed
Transit.
-
>g.53 eyl
Star's Name.
42
Observed
Transit.
J-S
jia-j >
^l-*** i
si*
SSS
o Q.SO
A
1902 October 10.
Greenwich.
52Cygni
X Cygni
56 Cygni
76 Draoonis
I Cygni
Piazzi XXI. r
f Cygni
r Cygni
<r Cygni
Lund 10053
Groombriiige 3548
Groombridge 3548 E
E
E
K
i:
E
Pegasi
Bradley 2851....
Bradley 2852....
T! Pegasi
-*2 Pegasi
Piazzi XXII. 36
i Lacertse E
Bradley 1399 S.P ...j E
Bradley 2993 E
Groombridge 3804 1 E
8 Lacertte | E
E
K
Piazzi XXII. 159.
10 Lacertse.
io'o8o
10*074
i4"57i
io'o8o
8-53
11-137
io'o8o
h m s
20.40.35-43
20.43. 33-94
20. 46. 34-50
20. 49. 40-43
21. I. 20-62
21. 4.28-14
21. 9.44-64
21. 10.51-53
21. 13. 32-74
21. 15. 26-52
21. 19. 16*25
21. 19. 14*15
21. 40. 11-52
21.41.28-99
| 21.41. 55-25
22. 4. 52*2I
22. 5. 37-28
22. 9. 39-65
22. II. 4I'l6
22. 15. 18-54
22. 21. I 8 '9 3
22.28. 5-86
22. 31. 30*09
22.31. 5*37
22.34.51-36
35-26
33*80
40*97
20*50
27'97
44-47
51-39
32*60
26*38
17*81
14*82
11*29
28*76
55*02
5i'99
37-07
39H5
40*95
1774
19*39
5*66
29-88
5-16
5i-i5
39'99
39-00
45-09
25*09
32*62
49*14
55^7
37-23
31*00
19*86
j iq*86
I5-94
33-48
5977
56*78
4i'77
44'i3
45*62
21*51
24'47
10*39
34*64
9*86
55'79
473
4-63
4*62
4*12
4-59
4*65
4-67
4-58
4*63
4*62
2*05
5*04
4*65
4*72
475
4'79
4*70
4*68
4*67
377
5*08
473
4*76
4*70
4*64
774
4*64
4*63
4*60
4*66
4-68
4'59
4-64
4*63
4*66
473
4*76
4'79
4*70
4*68
4*67
4'73
4*76
4*70
4*64
12 Lacertic
13 Lacertse
A Pegasi
H Pegasi
6 1 Pegasi
9 Andromedse. . .
T Pegasi
67 Peg'isi. ....
13 Andromedse .
Bradley 3147....
Bradley 3147
if Androinedie
W.B. (2) XXIII. 907
Groom bridge 4153
Groombridge 4159
f Peasi
Groombridge 4219
Bradley 3212
a Andromeda;
23 Andromedse
Piazzi 13
Bradley 1672 S.P
Bradley 1672 S.P. ,
Bradley 1672 S.P.,
10*080
8*867
7-387
io'o8o
9-882
8*131
5*904
22. 37. 4*88
22. 39.42*72
22. 41. 48*10
22.45. 15'87
23. io. 58*84
23. 13. 44*32
23. 1 5. 46*80
23. 2O. 2'82
23.22.23*97
23. 28. 11*91
23. 28.
23.41-
23-44-
23. 46.
23-49-
23. 52.
23. 59.
o. i.
o- 3-
o. 8.
o. 9.
o. 13.
11*69
io*94
45' ! 5
3774
6*46
45' 6 5
34-82
3I-45
19-14
2574
26*49
29*06
4-68
42*52
47-87
15*64
58*62
44*12
46-57
2*60
23-77
12*62
13*32
10*82
45*01
37*61
6*32
45'47
34*69
31*28
18*17
25*61
26*36
25*42
9-42
i 47'3 1
52-51
20*28
3*21
48-74
51-23
28-45
17-62
17-62
15-37
49-64
42-17
10*97
50*13
35'95
23-63
30*16
31 *oo
27-43
0.13.27-17 25*22 27*43
0.13.26*54 24*59 2 7'43
4-74
4-79
4*64
4*64
4-59
4*62
4-66
4-58
4-68
5*00
4*30
4-55
4*63
4*56
4*65
4*66
4*58
4*67
4*66
4-55
4*64
2*21
2*84
1902 October 12.
Greenwich.
75 Draconis
52 Cygni
56 Cygni ..............
32 Yulpeoulse ........
Cygni ...............
Piazzi XXI. i .......
f Cygni ..............
<r Cygni ..............
Groombridge 3548.
Groomliridge 3548..
E; 7
! 9
E
E
K
i-:
E
E
!:
10*080
9*898
2O. 35. 2I*OI
20.40.35-48
20.43. 33-90
20.46. 34*36
20. 50. 21*53
21. i. 20*45
21. 4. 28*06
21. 8.44*62
21. 13.32*59
21. 19. 11*38
W io 5*440 21.19.11*19 14*02 19*13
21*55
35'24
33-67
34'i7
21-28
20-26
27-82
44-38
32-38
13-32
25-75
39-95
38-39
38*96
26*01
25-04
32*58
49*10
37-19
19*13
4*20
4-71
4'72
479
4'73
478
476
4-72.
4-81
5-8,
5*11
4'7i
472
479
473
478
476
4-72
4*8 1
74 Cygni
75 Cygni
77 Cygni
Bradley 2841
K Pegasi
Bradley 2851
Bradley 2852
Groomliridge 3655
i Pegasi
IT, Pegasi
ir 2 Pegasi
i Lacertre
9 10*080
21. 32.59*94
21. 36. 18*99
21. 38. 25*24
21. 39. 8*84
21. 40. 11*38
21. 41. 29'O2
21.42.55*23
21. 58. 58*51
22. 2. 26'OO
22. 4. 52*19
22. 5. 37-09
22. 11.41*01
59*80
j 18*87
25*11
8-71
11*17
28*8l
55*02
58*40
2579
52*02
36*92
40*86
4-65
23*76
29*83
i3'59
i5'92
33-46
5975
3-09
30-54
5676
4i74
45*60
4*85
4-89
472
4*88
475
4*65
473
4-69
475
4'74
4*82
474
1902 October 14.
Greenwich.
Bradley 2701.
75 Draronis...
X Cygni
S 6 Cygni
32 VulprOultB..
Groombridge 3351 ....'W
Cygni
Piazzi XXI. i.
f Cygni
T Cygni
o Cygni
Lund 10053
\v
w
w
w
|w
Groombridge 3548 ! W
Piazzi IX. 37 S.P..
74 Cygni
77 Cygni
Bradley 2841
K Pegasi
Bradley 2851
Bradley 2852
i Pegasi
ir 2 Pegasi
Piazzi XXII. 36...
i Lacertie
IO*O8O 20. 32. 57*46
20. 34. 19*85
20.43.33*61
20.46. 34*14
20. 50. 21*44
20. 55.46*15
21. I. 2O*26
21,
II,
10-139
8-473
IO*o8o
4.27*85
8. 44*50
21. IO. 5I'I5
21. 13.32*45
21. 15. 26*32
21. 19. 10*78
21.23. 6*45
21. 33. 0*04
21. 38. 25-18
21.39. 8*97
21.40. 11*39
21.41. 28*87
21.41.55*23
22. 2. 26*02
22. 4--52-15
22. 5.37*21
22. 9. 39*49
22. II. 41*02
2O'72
33'47
34*04
21*26
46*04
20*16
27*68
44-33
51*02
32-33
26*19
13*58
5*28
59^5
24*99
8*78
11*15
28*63
54'99
25*78
5''93
36*99
39*30
40*82
3"9
25*48
38-35
38-91
25*98
50*90
24*99
49*06
37-I4
30-91
18*43
IO*I2
4*6 1
29*79
-3'55
15*89
33'43
5972
30*52
5673
41*71
44-07
45-56
476
476
4*88
4-87
4*72
4*86
4*83
4*86
473
4-87
4*8 1
472
4*85
4*84
4*76
4*80
477
474
4*80
473
474
4*80
472
477
474
4-89
4*88
473
4*87
4*84
4*87
474
4*88
4*82
473
476
4-80
477
474
4*80
4-73
474
4'So
472
477
474
Bradley 1399 S.P E
Bradley 2993 E
Bradley 2993
a Andromedse
/3 Pegasi
56 Pegasi
6 Andromedse ,
W.B. (2) XXIII. 95.
61 Pegasi
T Pegasi
67 Pegasi
13 Andromedse
Bradley 3147
Bradley 3147
K Amlromedse
78 Pegasi '
if Andromeda?
W.B. (2) XXIII. 907
Groombridge 4159
if Pegasi
85 Pegasi
o Andromeda
23 Andromedie
5*861
10*080
8*508
6*01 8
10*080
22.15.20*17 18-49 22*28
22.21.17*68 19*09 23*61
22.21.16*70 18-79 23*61
22. 57.
22.59.
23. 2.
23- 5-
23. S.
23. io.
23-15-
23. 20.
23. 22.
23.28.
23.28.
23-35-
23- 39-
23.41.
23.45.
23-49-
23.52.
23-57-
o. 3.
o. 8.
24*36
0*90
1977
55^5
1 8*30
58*70
46-76
2-55
23-67
IO'2l
973
35-04
3-28
10*74
45-05
6-59
45-67
3*08
19*13
574
24*18
0*67
54*88
18*07
46-5
2-32
3'49
I2'22
12-66
34-94
3*10
10*65
44-91
6*46
45-48
2-89
18-95
25-62
28*90
5-36
24*28
i 5977
22*74
3-18
51*20
28-41
16-88
16-88
39'44
7'9'
15-35
49-62
10*95
50*12
7'44
23*62
30*16
379
4-52
4*82
4*72
4*69
4- 5
4*89
4*67
47i
4*69
4*83
4-92
4*66
4*22
4-50
4*8 1
4*70
47i
4'49
4'64
4'55
4-67
4'54
1902 October 15.
74 Cygni E
75 Cygni E
77 Cygni ' E
K Pegasi ! E
Bradley 2852 E
Leiden 9262 E
10*080
21.33. 'oo
21. 36. 19*11
21. 38. 25*17
21. 40. 11*43
21.41.55*22
21.56. 7*29
5975
18*87
24*92
11*15
54-94
7*02
4-59
23-69
29-77
15-87
59-70
11*92
4-84
4-82
4*85
4-72
4-76
4-90
Greenwich.
4-84
4*82
4-85
472
476
4*90
IT, Pegasi
T,, P--gasi
Piazid XX 11. 36...
Bradley 1399 S.P.,
Bradley 2993
9 | io'o8o
9
"778
9*164
22. 2. 26*06
22. 4.52-I7
22. 5.37-I8
22. 9. 39*45
22. 15. 18*49
22. 2O. 18*65
25*78
51-90
36-9I
39*20
17*62
19-09
30-50
56-71
4170
44-05
22-46
23-42
472
4*8 1
479
4-85
4*84
STAR-TRANSITS OBSERVED BY MR HOLLIS WITH TRANSIT C., AND EESULTING CLOCK ERRORS.
293
Star's Name.
Position.
No. of Wires.
R.A.
Micrometer.
o .
-2.-S
Observed
Transit.
j S- 5
feg -
IS".
ga
H <
Clock
Apparently
Slow.
Clock
Apparently
Slow at o h
Sidereal.
_ I
.1 s""
Star's Name. : *<
3 .
r z
R.A.
Micrometer.
i ^
S- 1 -"-
Observed
Transit.
I 8*
si.
W
Clock
Apparently
Slow.
X-
~ - *
x x-n <a
'-* 1* as *
a is!
*s
1902 October 15 continued
Bradley 2993 W
Groom bridge 3804 W
8 Lacerta? W
10 Laceihe \V
iz Lacertae W
13 Lacertfe i W
\ P.-irnsi W
p Pe-a*i W
W.B. (2) XXIII. 95 W
61 Pegasi W
9 Andromeda? \V
1902 October 16.
v Cygni ' K
Groombridge 3351 E
{Cygni j E
Piazzi XXI. i j E
fCvgni E
E
E
r.
i;
7-318
io'o8o
>'o8o
Cygni.
a Cygni
Lund 10053
Groombridge 3548..
Piazzi IX. 37 S.P
75 Cygni
77 Cygni
Bradley 2841
K Pegasi
Bradley 2852
14 Pegasi
16 Pegasi
Leiden 9262
Groombridge 3655
< P'-gasi ,...
Bradley 1399 S.P...;...
Bradley 2993
Bradley 2993 E
13-058
15-116
io'o8o
9-962
12-658
11-867
lo'oSo
o Andromeda W
/3 Pegasi !W
1902 October 17.
Cygni W 6 10*080
Piazzi XXI. i W 7 i
r Cygni W 9 I
Lund 10053 W, 9
Bradley 2841 W] 9
K Pegasi W 9
Bradley 2851 W 7
Bradley 2852 W 9
14 Pegasi W 9 !
Piazzi XXI. 339 W 5
Groombridge 3655 W 9
t Pegasi W 9
Bradley 1399 S.P W 10 10-488
Bradley 2993 : W | 10 12*926
Bradley 2993 E
38 Pegasi | E
Groombridge 3804 E
8 Lacertte I E
10 Lacertie E
\ Pegasi E
1902 October 18.
h m a
22. 21.
22. 28.
22. 31.
22. 34.
22. J/.
22. 39.
22.41.
22.45.
23. 8.
23. 10.
23.13.
20. 53.
20.55.
21. I.
21. 4.
21. 8.
21. I O.
2I.IJ.
21. 15.
21. 19.
21.23.
2..36.
21. 38.
21. 39.
21. 40.
21. 41.
21.45.
21.48.
21. 56.
21. 58.
22. 2.
22. 15.
22. 21.
17-23
575
29-93
51-11
47'
42-53
47-8,
15-64
18-07
5^54
43-89
29-50
46-26
20-48
28-06
44-60
51-28
32-55
26-33
11-25
7-25
18-99
25-06
8*80
11-23
55'7
29-40
35-00
7'24
58-36
25-86
20-82
16-49
22. 21. 17-76
22. 57. 24-22
22. 59. 079
21.39.
21. 40.
21.41.
21. 41.
21.45.
21. 51.
21. 58.
22. 2.
22.15.
22. 21.
20-32
27-88
5I-28
26-29
8-90
II '20
2876
55'3
29-35
47 '99
58-38
25'83
18-99
18-15
11-476 ,22.21. 19-34
10'oSo i 22. 25. 32-06
,, 22. 28. 5-64
. |22. 31.29-87
,, ,22.34.51-10
i 22. 41.47-89
i Laoertse I El 8 10-080
Bradley 1399 S.P E ] 10 J 10-925
Bradley 2993 E 10 7-817
Bradley 2993 W
H Pegasi W|
15 Laeertse W
Groombridge 3919 W
o AndromediE W
3 Pegasi ' W
7-256
10*080
22. II. 40-92
22. 15. 17-88
22. 21. 19-21
22. 21. l8'02
22.45. '5"5-
22. 47. 36-22
22. 49. 36-72
22. 57.24-2I
22. 59. 075
'8-35
5'57
2 9'75
50-92
4'53
15-41
17-85
58-32
437"
29-30
46-00
2O"2 }
27-76
44-30
5 1 "oo
32-28
26-05
2*72
6-81
18-81
24-87
8'6i
10-97
54-81
29-15
3474
7-01
58-18
2^-60
,875
18-23
18-82
24-03
0-54
26*03
8-64
10-93
28-49
5476
29-08
4773
58-12
25-56
18-70
,8-, 9
18-70
3'73
5'3'
29-54
5077
40-67
17-84
18-78
18-27
15-31
36-04
36-54
24-03
0-55
23-42
10-32
34-57
5573
I 9-36
47^4
52-46
20-23
j 2274
i 3''7
48-70
34-06
50-85
2**94
32-51
49-03
55^5
37-10
30-87
17-78
10-39
23-67
2975
13-51
15-86
59-69
34-01
39-64
11-91
3-01
30-48
22-64
23-23
23-23
28-87
5'35
20-06 : 24*92
27-61 : 32-49
30-85
'3'49
15-84
33-38
59" 6 7
33'99
52-55
2-99
30-47
22-81
23-04
23-04
36-61
10*29
34-54
557
52-44
45-5
22-98
22-86
22-86
2O'2O
40*90
4I-J9
28*85
5'33
4-82
4-81
4-83
4-89
4 -s8
4-82
4-89
4-85
4-99
4-76
4-85
47'
4^5
473
4-85
4-82
4-82
5-06
4-86
4-88
4-90
4-89
4-88
4-86
4-90
4-90
4-83
4-88
3*89
5*00
4-41
4-84
4'8i
4-86
4-88
4-81
4-82
4-85
4-91
4-89
4-91
4-91
4-82
4'8 7
4-91
4-11
4-85
4'34
4-88
4-98
5-00
4'93
4-86
4-83
5"'4
4-08
4-89
4-86
4-85
4-82
478
Greenwich.
475
4-82
4*81
4*83
4*89
4-88
4-82
4-89
4-85
4'99
67 Pegasi
Bradley 3 1 47 .
Bradley 3147.
a Andromedse
23 Andromedse
PUzzi 0. 13
Bradley 16728. P..
Bradley 1672 S.P..
Greenwich.
477
4*86
4-72
475
473
4-85
4-82
4-82
4*86
4*88
4*90
4-89
4*88
4-86
4'9
4*90
4-83
4-88
4-81
56 Pegasi
13 Andromelse.
Bradley 3147....
Bradley 3147
78 Pegasi
ij/ Andromedse
W.B. (2)XX1II 907..
Qroombridge 4153
ty Pegasi
Groom bridge 4219 ....
Bradley 3212...
a Andromeda
23 Andromedse
Piazzi 0. 13
Bradley 1672 S.P
Bradley 1672 S.P.
Bradley 1672 S.P.
TT Andromedie
! Andromedie
Piazzi 0. 148
v Andromeda
W.B. (2)0. 1172...
2 Ursse Minoris
2 Ursse Minoris
41 Andromedse
Greenwich.
4-86
4 -88
4 -8 t
4-82
4-85
4-91
4-89
4-91
4-91
4-82
4-87
4-91
4-98
5 "oo
4'93
4-86
/ Pega-n
15 Lacerrn?
Groombridge 3919 ...
o Andromedae
j3 Pegasi
56 Pegasi
6 Androtnedie
W.B. (2) XXIII. 95.
61 Pfgasi ,
T Pegasi
67 Pegasi
13 Andromedie
Bradley 3147
Bradley 3147
K Andromedse
78 Pegasi
\f/ Andromedae
W.B. (2) XXIII. 907.
Polaris ..
1 E
I E
E
E
E
E
E
K
K
i-:
!:
E
E
\v
W
W
W
W
W
Greenwich.
4-83
4*8 9
4 -86
4-85
4-82
47 8
56 Pegasi
6 Andromedae
W.B. (2) XXIII. 95..
61 Pegasi
9 Andromedae
T Pegasi
Bradley 3147
Bradley 3147.
i Andromedae
10*080
10*985
E 10 12*320 23. 28. 12
23. 20. 2*46
23. 28. 9-89
W 9
W 8
W 9
W 10
E 10
\V
W:
Wj
E
E
E
K
i
B
B
E
E
B
W 10
JW 9
! w! 8
w
w
Iw
I W 1 9
W 10
W 9
io'o8p o. 3. 19*04
,, ' o. 8. 25-44
it - 9.26-36
10-427 0.13.29-53
7-665 o. 13. 24-15
io'o8o
10-380
12-994
10*080
10-127
12-450
15-015
10-370
10-370
10*080
13*684
9-619
10*080
10-080
23. 2. ig'68
23.22. 23-78
23.28. 9-52
23. 28.
23. 39.
23.41.
23.44.
23.46.
23. 52.
23. 59.
O. I.
o. 3.
o. 8.
o. 9.
o. 13.
1 1-23
3-39
10-69
45-06
37-39
45-63
34-66
31-42
19-10
25-58
26-41
26-65
8-415
7-637
1O'O8O
7*684
IO*oSo
12-973
10-568
io'o8o
2-26
11-51
12-88
18-82
25-26
26-18
25-78
7' 1 4
16*71
16*71
23*62
3"'5
31*02
28-43
22*09 28-43
o. 13. 30*35
o. 13. 30-90
0.31.37-42
0.34. 3-81
o. 36. 23-95
o. 44. 24-89
o. 48. 5-39
o- 55- 39-95
0. 55. 40*20
1. 2. 23*76
22.45. 15-63
22. 47. 36-34
22. 49. 36*85
22. 57. 24*28
22. 59. O'8l
23. 2.I9-82
2 3 . 5.55-06
23. 8. 18-16
23. 10. 58-64
23. 15. 46-66
23. 20. 2*59
23.22.23*76
23. 28. I2"6i
23. 28. 1 1-63
23- 35- 347
23.39. 3*24
23. 41. 10*62
23- 44- 45' 02
1.25. 9'45
23- 2. 19*55
23- 5- 54-95
23. 8.18*07
23. io. 58-44
23- 13-43-95
23. 15. 46*48
23.28. 9*75
23. 28. i3'n
23. 33. 19-66
19-42
23-59
11-99
1278
3-09
10*44
4477
37''3
45-32
34*40
31*12
18*80
25-31
26-14
22-82
24-83
25-38
38-49
4-82
23-69
24'69
5*18
4'75
42*00
23-58
15-32
36-01
36-52
23-95
0-49
19*50
5473
17-84
58-32
46-35
2-26
23-43
1 1*46
11-40
3444
2'97
10-36
44-76
9-27
19-35
5477
17*87
: 58-24
4377
46*28
10*17
I2"6l
19-41
24-27
28*40
16-56
16-56
7-90
15-34
49*61
42*14
50*11
39-25
35-94
23-62
30*15
31-02
28-58
28-58
28-58
43-37
97 i
28-54
29-46
10-07
46-89
46-89
28-45
20'2I
40-92
41-40
28-87
5 '34
24-26
5974
22-72
3-16
51-18
7-'3
28-39
16-41
16-41
39-42
7-90
'5"33
49-61
11*37
24-25
5973
22-71
3''5
48-67
51*17
16*27
16*27
24*25
4*88
5*20
4*80
4-89
4-84
2-65
6-34
4-85
4-81
4'57
378
4-81
4-90
4-84
5-01
479
4*85
4*82
4-82
4-84
4-88
576
375
3-20
4-88
4-90
4-85
477
4*89
5 - '4
4-89
4-87
4-89
4-91
4-88
4-92
4-85
4-76
5*01
4*88
4*84
4-83
4-87
4-96
4'95
5*01
4*98
4-93
4'97
4-85
2*10
4*90
4^6
4^4
4-91
4-90
4^9
6"io
3-66
4-84
4-84
GREENWICH OBSERVATIONS, 1902.
2 P
294
TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Star's Name.
Position.
No. of Wires.
R.A.
Micrometer.
Observed
Transit.
Corrected
Transit.
Tabular
Apparent
R.A.
o S ^
= o
G|l
<
Clock
Apparently
Slow at o h
Sidereal.
Star's Name.
Position.
No. of Wires.
R.A.
Micrometer.
Observed
Transit.
Corrected
Transit.
Tabular
Apparent
K.A.
Clock
Apparently
Slow.
-
-*1": +j*rt
gS
5 0,5-3
f|i
1902 October 18
K Andromedse
i
SB
m
E
E
];
B
E
B
B
K
I
con
9
9
5
9
9
9
9
5
9
9
Q
tinuei
r
10*080
)
D
j>
H
M
) 1
I)
If
1.
h m s
*3-35-34'9i
*3- 39- 3'37
23. 41. 10-65
23. 44. 44-97
23.46.37-50
23.49. 6-24
23.52.45-58
23- 54- *9'49
*3- 57- z'9
23. 59. 34-69
O. 1. IQ"I7
3
34-66
3-12
10-39
44-72
37'*5
5 '99
45'33
29-24
2-65
34'44
iS'88
s
39'4i
7-89
15-32
49-60
42-13
10-93
50*10
34-09
7'43
39-24
27'6l
475
477
4'93
4-88
4-88
4'94
477
4-85
4-78
4-80
*TH
Greet
s
475
477
4'93
4-88
4-88
4'94
477
4-85
4-78
4-80
4'73
i wick.
E
E
W
W
W
w
w
w
w
9
10
IO
8
8
9
9
9
9
10*080
9-663
13-253
lO'oSo
ft
j>
j
) j
h m s
o. 8.25-58
o. 13.23-48
o. 13. 27-85
o. 24. 56-80
o. 27. 38-59
o. 31.38-52
o. 34. 4-90
-3 6 - 2 3'74
0.40.45-51
8
*5'33
23-78
26-46
56-58
38'37
38-30
4-69
*3'53
45' 2 9
s
30-14
28-85
28-85
1-52
43'3>
43'37
9-72
28-54
5'33
s
4*81
5'7
2-39
4'94
4'94
5 '7
5'3
5-01
5-04
s
4-81
4'94
4'94
5 '7
5-03
5-01
5-04
78 Pegasi
Bradley 1672 S.P. . . .
ty Andromede-e
Bradley 1672 S P
W.B. (2) XXIII. 907
Groombridge 4153
28 Andromedre
Groombridge 4159 ..
Piazzi 0. 103
I// Pegasi
TT Andronied<e
8 Ai'dromedfe
85 Pegasi
Piazzi 0. 148
Groombridge 4x19
Groombruige 140
a Andromedse ..
1902 October 21.
Greemvich.
Groombridge 3548....
1 fi
12
Piazzi IX. 37 S.P
E
IO
F
R
7< Cvffiri ..
K
77 Cvfirni ..
E
I
Bradley 2841
El
Q
it Pegasi
Fi
c
Bradley 2852
E
E
r
Piazzi XXI. 339
F,
8
V
E
S
i Pegasi
Fi
9
Bradley 1399 S.P
E
Bradley 1399 S.P
F,
Bradlev 2001
F
Bradley 2993
W
IO
W
8 Lacertre
W
W
12 Lacertae
W
13 Lncertse ,
\v
\\ T
I
w
6 Andromeda
W
6
W.B. (2) XXII. 95
61 Pegasi
w
w
9
T Pegasi . . .
w
8
12*574
21. 20. 10*77
I 1*17
i6'o
4-68
67 Pegasi
W
9
io'o8o
23. 20. 2"54
2-34
7*09
475
21 23 6*21
e-C7
rirf
Bradley 7147., .
W
10
8-292
23.28. 8-52
10*09
15*74
5-65
10*080
21.32.59*77
21 36 18*98
59'5*
18-77
4-46
4'94
4'8-j
4'94
4-83
Bradley 3147
E
10
14-783
23. 28. I1'O2
11-67
15*74
4*07
21. 38. 25*07
24'82
8*0
29-65
4-83
4-83
W
Q
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27. Ci. 2Q'4Q
29*29
34-08
4*79
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85 Peo-asi
W
g
23. 57. 2-73
2*51
7-41
4-90
Groombridge 4219
w
8
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23. 59. 34'48
34*3
39*22
4*92
w
9
o. i. 31-18
30-96
35-92
4*96
4*87
4*87
a AndromedtE
w
I
o. 3. 18*93
1871
23*60
4*89
-w
a
o. 5. 13*61
1 3*44
1 8 '44
c'oo
11*82
23 Aiidromedse
w
9
o. 8. 25-46
25*28
30*13
4*85
21 58 58*14
Piazzi 13
w
Q
o. 9. 26*26
26*08
3 1*00
4*92
Bradley 1672 S P.
w
IO
O. I 7. 70*48
26-82
20*77
2*< Z
12*502
8*832
22.15.19-94
19*10
18*27
23-56
4-46
Bradley 1672 S P.
F
IO
8-085
o. 1 3. 26*45
24*48
20*77
4-80
18*29
Piazzi 0. 74
F
9
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0. 22. 58*05
57-81
2-58
477
28 Andromedje
F
Q
o. 25. <*6"Q8
56*71
i'i-
4-80
8'2Q1
E
q
o. 27. 38*77
38*50
43*30
4"8o
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22. 28. ?*C4.
r'-ir
IO*22
4*87
4*87
IT Andromedae
R
1
o. 31. 38-78
38*51
43*36
4-85
4*82
4-82
Grooinbrid''e 140
E
8
o. 40. 45"68
45-44
50*33
4*89
4'8o
4*80
v Andromedre
F
Q
o. 44. 24-91
24*66
29*46
4-80
22. 17. 4*< I
W.B. (2)0. 1172
F,
Q
>;
0.48. 5-46
5*20
10*07
4-87
"
4*82
4*87
H Andromedse
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a
o. ci. 10*06
18-80
23*67
4-87
22. <Q. O'6o
4*81
4*8-1
2 Ursae Minoris
E
in
9*924
o. 55. 41-42
41*83
46*92
5'9
Polaris
F
IO
7*400
i. 25. 6'6i
8*79
I2"OI
3*22
'
cn'68
Polaris
F
IO
Q'OOI
i. 25. 6*70
8*89
I2'OI
VI2
23. 8. 18*00
17-78
58-20
22-68
4-90
4*90
Polaris
W
IS
9-587
i. 25. 2*94
7-58
1 2*O I
4-47.
i
23.15.46-65
46-42
5 1 'i 4
4-72
4-72
1902 October 22.
Greenwich.
ff Cy^ni
W
W
W
W
W
W
W
W
E
E
E
E
E
E
E
E
E
E
E
E
E
E
W
W
W
W
6
9
10
9
9
6
4
S
g
9
9
9
IO
12
9
4
9
9
9
9
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9
9
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10
7
9
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10*080
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21. 13.32*25
21. 15. 25*90
21.23. 7'5*
21. 30. 44-63
21.32. 59*58
21. 36. 18*83
21. 39. 8*76
21. 45. 29*12
22. 4.52-07
22. 5.37-05
22. 9. 39*30
22. II. 40*92
22. 15. 18-17
22. 21. 18-67
22. 57. 24-20
22. 59. 0-77
23. 2. 19-69
23. 5.55-08
23. 8. 18*12
23. 10. 58-56
23. 13.44*06
23. 15. 46*61
13. 22. 23-79
22. 15. 20-83
22.21.23-75
22. 28. 9*OI
22.31.33-32
32-03
25-68
7-10
44-41
59'3 6
18*61
8-54
28-89
51-78
3676
39-01
40*63
18*23
18*05
23-91
0-49
19-41
5479
17-84
58-28
43'77
46*32
23-50
22-63
22-68
9-46
3377
36-97
375
11-30
49-52
4'44
3'54
'3'39
33'9'
56*60
4i'59
43'93
45'43
23*79
21*96
28-80
5'*9
24*21
59' 6 7
22*67
3-11
48-62
51-14
28-33
24-50
21-17
10-15
34'4i
4'94
5'7
4-20
5-11
5*08
4'93
4*85
5-02
4-82
4-83
4-92
4*80
5-66
3-91
4*89
4*80
4-80
4-88
4-83
4-83
4-85
4'82
4-83
1-87
-1-51
0*69
0*64
4'94
5'7
*"*!
5-08
4'93
4-85
5*02
4-82
4-83
4-92
4-80
4-89
4-80
4-80
4-88
4-83
4-83
4-85
4-82
4-83
Pa
0*69
0*64
Bradley 3147
E
W
W
W
W
w
w
w
w
w
w
E
W
E
E
E
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E
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W
W
W
W
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9
9
9
9
9
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9
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23. 28. 13*01
23. 28. 9*65
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23. 49. 6'io
2 3-5 J -45'35
23.57. 2-62
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O. 1.31 *2O
o. 3. 18*83
o. 13. 27-91
o. 13. 20*94
1.25. 2*61
I. 25. 11*14
1.25.11-52
1.47.29*77
1. 50. 7-24
I. 50. 20*62
I. 52. 28*05
1.57. 14-71
22. 34. 54>I
22-37. 7-94
22. 39.4576
22. 41. 51*04
I2'26
9-82
44-56
37-21
5-88
45-I2
2-39
34''3
3'97
1 8*60
26*88
21*60
3 '49
9'57
9'95
29-49
6*95
20*33
27-76
14-42
54-86
8*38
46*19
5''55
15*51
15*51
49'57
42*10
10*90
50*08
7'4'
39*22
35'9 2
23*60
29-64
29-64
12-03
12-03
12-03
34-42
11*69
25-13
32-62
'9'34
55'58
9*20
47-08
5 Z> 34
3'5
5*69
5*01
4*89
5*02
4*96
5-02
5*09
4'95
5*00
2-76
8-04
8-54
2-46
2-08
4'93
474
4-80
4-86
4*92
0*72
0*82
0*89
0-79
5-01
4-89
5-02
4*96
5-02
5-09
4'95
5-00
4'93
474
4-80
4-86
4'93
0-72
0*82
0*89
0*79
Lund 10053
Piazzi IX. 37 S.P
72 CvTTli.. .
W B (2) XXIII 907
74 Cvgni .. .
7C Cvni .. .
Bradley 2841
1 4 Pegasi
-., Peo-asi. . .
Groombridge 4219
jr 2 Pegasi
Piazzi XXII. 36
Bradley 1672 S P
Bradley 1672 S P
Bradley 1399 S.P
Bradley 2993
o Andromedfe
c6 Pegasi.. .
6 Andromedse
W.B. (2) XXIII. 95
6 1 Pe^asi
9 Andromedse
T Pegasi
13 Andromedse
1902 October 25
ris.
10 Laeertte
Bradley 2993
Groombridge 3804
STAR-TRANSITS OBSERVED BY MR HOLLIS WITH TRANSIT 0., AND RESULTING CLOCK ERRORS.
295
Star's Name.
Position.
No. of Wires.
R.A.
-Micrometer.
Observed
Transit.
Corrected
Transit.
llj
SS*
P-5J
j>>
Sis
3, 'S
5H.S
IS
9
Clock
Apparently
Slow at i2>>
Sidereal.
Star's Name.
Position.
No. of Wires.
K.A.
Micrometer.
Observed
Transit.
Corrected
Transit.
Tabular
Apparent
R.A.
Clock
Apparently
Slow.
Clock
Apparently
Slow at i2 b
Sidereal.
1902 October 25
W
W
E
E
E
E
E
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E
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E
E
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E
E
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E
E
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-W
W
W
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w
w
w
W
w
E
E
E
E
W
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w
w
w
w
w
w
w
E
E
E
E
W
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B
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B
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K.
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9
10
10
9
9
9
9
10
9
7
9
8
6
7
7
8
6
9
9
9
10
9
8
10
8
9
10
9
9
9
8
7
9
9
9
9
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9
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9
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9
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9
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9
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22. 45. 1870
23. 28. 16-27
23. 28. 17-09
23.57. 6-17
23- 59' 37'94
o. i. 34-67
o. 3. 22-43
0. 1 3. 20'I I
0.23. 1-52
o. 25. 0-25
o. 31.42-15
o. 34. 8-52
o. 40. 49*2 1
0.43. 56-13
22. 39. 46-41
22.41.5175
22. 59. 4-65
23. I. 23-68
23. 13.47-82
23. 15. 50-58
23. 28. 10-54
23.28. 7-15
o. 3. 23-08
o. 5. 1778
o. 13.35-26
23. 20. 6 - 24
23.22.27-40
23. 28. 6-08
23. 28. 6-53
23. 39. 7-02
23.41. 14-30
23.46.41-23
23.49. 9-96
23. 52.49-28
23. 59. 38-00
o. 1.35-37
o. 3. 23-07
o. 5. 1774
21. 56. 10-78
21.59. ''77
22. 2. 29-45
22. 4. 55*66
22 5.40-56
22. 12. 44-36
22. 14. 40-88
22. 15.31-56
22. 21. I2'52
22. 28. 9'OO
23. 15. 50-61
23.20. 6-49
23. 22. 27-66
23.28. 870
23.28. 3-65
23- 33- Z3-51
23.35.38-66
23.39. 7-29
23.44.48-91
23.49. 10 ' 2 7
23.52.49-56
23.57. 6 ' 8 3
23. 59. 38-40
- '-35'35
s
19-21
14-63
1174
6-43
38-09
34-93
22-69
31-50
1-66
0-49
4*'37
876
49'33
56-29
46*20
5 1 '44
4-37
23-38
47-61
50-27
13-11
3'43
22-80
17-60
2971
6-28
27-54
13-30
1375
7-02
14-49
41-36
10*07
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38-51
35-14
22-84
i7' 6 3
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2-18
2 9'59
5 5 '9
40-80
44-65
41-17
25-39
i9'57
9-33
50-51
6-47
2775
14-62
13-28
23-61
3877
7^4
48-92
10-32
49'47
676
38-48
35'3
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2O'II
1473
1473
7-40
39'19
35-90
23-58
30-67
a-57
1-50
43-35
9-70
50-32
57-31
47-05
52-32
5-23
24-16
48-56
51-09
14-24
14-24
23"57
18-40
3i-35
7-03
28-26
14-01
14*01
7-82
15-22
42-05
10-85
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39'i;
35-88
23-56
18-39
n-68
2'73
2O'29
5 6 '47
4i-47
45'30
41-90
25-34
20'22
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51-07
7-02
28-24
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50-03
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0-56
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0-49
0-83
0-51
0-52
0-52
0-57
0-59
0-52
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0-91
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0-94
0-99
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0-88
0-86
0-78
0-95
0-82
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0-66
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0-69
0-56
0-66
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i. 25. n'68
1.25.25-44
o. 13.41-93
o. 13.41-58
o. 27. 42-45
o. 31.42-42
o. 34. 8-89
o. 36. 27-67
o. 43. 56-46
0.44. 28-58
o. 51. 22-82
I. 2. 27-63
i. 4- '8-55
i. 6. 19*65
i. 24. 52-39
o. 8. 29-56
o. 9. 30-44
0.13.3778
o. 13. 46-56
o. 31. 42*89
o. 34. 9-21
o. 40. 49*64
0.43. 56-63
o. 44. 28-91
0.48. 9-44
0.51.23-07
0.55.43*52
O. 2. 23-09
o. 8. 29*39
o. 9. 30*24
o. 13. 44*00
0.13.51*23
o. 51. 23*00
0.48. 9-39
0.55.42-14
o. 55. 38-20
I. 2.27*34
i. 4- 8 '54
i. 6. 19*48
I. 8. 29-23
i. 10. 54*84
I. 14. 8*46
i. 16. 38*43
i. 1 8. 8*26
1.47. 33*80
i. 24. 41*85
L 24. 55-53
s
28*48
9-13
22-80
44-91
2 7-35
18-47
19-36
29-14
8*32
38-44
8-17
6-49
10-37
29-58
29*23
42-40
42*41
8*86
27*60
5 6 -52
28-64
22*86
27-73
18-56
19*61
9*65
29*40
30*28
30-52
32-55
42*69
8*98
49-51
5 6 "47
2875
9-26
22-90
46-10
23-04
29>5
30-30
32*71
33 - '4
23-04
9*42
4 6- 57
45'44
27'74
18-80
19-68
29-37
55-08
8-62
38-85
8-55
3375
7-8,
11*65
29-45
10*07
23-68
46*67
28*47
19*49
20*42
30-18
9-40
39-55
9-22
11-72
11-72
3'-35
3i'35
43'29
43-35
970
28-53
57-3I
29-45
23-68
28-47
19-49
20-42
11-44
30*08
30-96
31-66
31-66
43-34
9-70
50-31
57-3I
29>5
10*07
23-68
46-45
23-56
30-07
30-95
31-94
3"94
23*67
10*06
46-40
46-40
28-47
i9'49
20-42
30-18
55'75
9-41
39"5 6
9-23
34'47
11*26
11-26
s
0*97
0-94
0*88
1*76
1*12
I '02
I "06
l'O4
I -08
I'll
I-0 5
5'23
I"35
I'77
2*12
0-89
0*94
0-84
0-93
0-79
0-8 1
0-82
0-74
0-93
o'8 1
1-79
0-68
0-68
1-14
0-89
0-65
072
o'8o
0-84
070
0-8 1
0-78
0-35
0-52
o"6i
0-65
077
i -20
0-63
0-64
0-17
0*96
0*73
0*69
074
0-81
0*67
0-79
071
0-68
072
3'45
0-39
0-97
0*94
0-88
ri2
I'OI
i'o6
1-04
i -08
I'll
1*05
0-89
0-94
0-84
0-93 '
079
0-8 1
o'8i
074
0-93
0*8 1
0-68
0-68
0-65
071
o'8o
0-84
070
o'8 1
078
0-51
0-62
0-65
0-63
0-64
073
0*69
074
0-8 1
0-67
079
071
0-68
072
Bradh-y 3147
W.B. (2) 1172
2 Ursa} Minoris
85 Pegasi
Andromeda?
Bradley 1672 S P
v Piscium
| And ro i n eda?
8 Amlroiiiedse
Polaris
Polaris
Bonn 654
1902 October 27
ris.
Bradley 16728.?. .
A. Pe^asi
Bradley i672.S.P
/S Pegasi..
Piazzi 0. 103
<6 Pegasi.. .
9 Anilroined<e
8 Andromeda?
r Pegasi. .
Piazzi 0. 148 ..
Bradley 3147
Bonn 654
Bradley T. 147...
v Andromeda?
a Andromeda?
Andromeda; ,
22 Andromeda}
T Piscium. ..
Bradley 1672 S P. ..
'is.
1902 October 28
Bradley 1672 S.P
Bradley 1672 S P
j/ Peo-asi
Bradley 3212
W B (2) 1172 . . .
a Andromeda?
22 Andromeda?
2 Urste Minoris
1902 October 29
is.
iTi Pegasi
Bradley 16^2 S P
v Pe<'asi
Bradley 1672 S P
Piazzi XXII. 65
W B (2) 1172
r Pegasi
67 Pegasi
T Piscium
<j6 Piscium
Bradley 3147
K Andromeda
78 Pegasi
a Trianguli
W.B. (2) XXIII. 907
& Peeasi...
85 Pegasi
29(5
TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Star's Name.
I
Hi
Observed
Transit.
fi-j
o>
D t- O
s as
Star's Name.
Observed
Transit.
t- c
at aj .
isi
5S.S3
1902 October 31.
Paris.
-! Pegasi
r 2 Pegasi
Bradley 1399 S. P...
Bradley 2993
Groombridge 3804.,
8 Lucertse
10 Lacertse
12 Lacertse
13 Lacertse
A Pegasi
11 Pegasi
15 Lacertfe
67 Pegasi
13 Andromedfe .
Bradley 3147....
Bradley 3147.
x Androme'lse
78 Pgsi
W.B. (2) XXIII. 907
Groombridge 41 5 3
Groombridge 4159
<fi Pfgasi
23 Andromeda:
io'o8o
10-635
9-249
io'o8o
9 10.080
9
10 12-409
12-104
10*080
h m s
22. 4. 56-12
2Z. 5.41-08
22. 15. 28-29
22. 21. I7'27
22. 28. 9-61
22.31. 33-98
22.34.55-15
22. 37. 8-74
22. 39' 46-60
22. 41. 5Z'II
22.45. '9-86
22.47.40-34
23. 20. 6*29
2 3- 22 - 2 7"34
23.28. 3-32
23. 28. 9-20
2 3-35^ 38-35
23.39. 7"'
23. 14-4876
23.46.41-19
23. 49. 10-04
2 3-5 2 - 49"45
o. 8. 29-21
56-07
41-03
24-97
20-90
9-62
33'99
55-16
8-76
46-63
51-98
'9'74
40-39
6-48
27-66
I2'O2
14-19
38-70
7' 2 5
4 8 99
41-50
10-32
49'57
29-51
56-44
41-44
2 5"75
'9'77
10-05
34"3i
! 55-48
| 9''
46-98
52-27
20*04
40-69
6-99
28-21
>3'37
39" 2 7
779
49"49
42-01
10-82
50*02
30-05
s
0-37
0-41
0-78
-1-13
0*43
0-32
0-32
0-34
'35
0-29
0-30
0-30
0-51
"55
''35
'3'37 , 0-82
'57
0-54
0-50
0-51
0-50
0-45
0-54
0-36
0-40
0-42
0-31
0*31
0*33
0*34
0*28
0*29
0-30
0-51
'55
0-57
0-54
0-50
0-51
0-50
0-45
0-54
Piazzi 0. 13
Bradley 16728. P..
Bradley 16728.?.
tr Andromedse
S Andromedse
Groombridge 140.,
Bonn 654
v Andromedse ....
/i Andromedse
2 Ursse Miuoris ...
2 Urste Minoris.
41 Andromedse .
/3 Andromedae .
T Pisciuin
Piazzi I. 29
v Piscium
| Andromeda .,
47 Andromedie .,
Polaris....
Polaris .
Polaris .,
W
W
lo'oSo
9-854
11-540
14-365
10*080
9-461
o. 9. 30-10
o. 1 3. 50*96
o. 13. 39-89
0.32.42-53
o. 34. 8-90
0.40.49*32
0.43. 56-50
o. 44. 28-61
o. 5 1. 22*89
0.55.42-35
I. 2.27-86
r. 4. 19-01
i. 6. 20*07
i. 10. 55-29
i. 14. 8-97
i. 16. 39*02
i. 1 8. 8-79
1.24. 58-43
30-40
34'5 6
s
30*93
3 2 '49
30-29 32-49
4 2 74
9-08
49-68
56*80
28-91
23-16
o. 55. 38-46 j 45-00
8764 1.24.45-64
7-327 I i. 24. 45-38
46*08
27-92
18-99
19-99
55'H
8*88
39*09
8*78
12*05
9-14
8-88
43'33
9*68
50*30
57-29
29*43
23*66
46*30
46*30
28*46
19*49
20*42
5575
9*41
39*56
9*23
11*17
11*17
11-17
s
0*53
-2*07
2*20
0*59
0*60
0*62
0-49
0*52
0*50
1*30
C'22
0-43
0*51
0*53
0*47
0*45
-0-88
2-03
2-29
'53
0-59
0*60
0-62
0-49
0*52
0-50
0*54
0-50
0*43
0-51
'53
0*47
0*45
1902 November 2.
Paris.
10 Lacertse
/8 Pegasi
ty Pegasi
85 Pegasi
Bradley 3212 .
a Andromedse..
W
W
W
W
W
W
22 Andromedse ... ..I W
23 Andromedse
Piazzi 0. 13
Bradley 1672 S.P.
Bradley 1672 S.P.
Piazzi 0. 74
28 Andromedse ....
Piazzi 0. 103
IT Andromeda-
8 Andromeda!
Piazzi 0. 148
Groombridge 140 .
10*080
9-485
8-552
io'o8o
22. 34. 54-95
22. 59. 474
2 3- 5 2 - 49"58
7-02
35"5 2
3.23*19
2 3- 57-
o. i.
o.
o. 5. 17*72
o.
o.
2 9"53
9. 30*49
O. 1 2. 48*5 I
o. 13. 39-77
o. 23. 2-39
0.25. 1.37
0.27.43-22
o. 32. 43-28
o. 34. 9 "60
o. 36. 28*42
o. 40. 50*12
55*18
4*84
49*66
7*11
35-63
2 3'3
18*02
2976
30*72
34' 2 7
3 2 '43
2*38
1*24
43*09
43*18
9-48
28-26
50*10
55H4
5''5
50-00
7-34
35-85
2 3'53
18-34
30-04
30*92
33'"
33-11
2-52
1-46
43-26
43'3 2
9-68
28-51
50-29
0*26
0-31
0*34
0-23
0*22
0*23
0*32
0*28
O'2O
-ri6
0-68
0-14
O"22
0*17
0-14
0*20
0*25
0*19
0-25
0-30
0-34
0-23
O'22
0-23
0-32
0-28
0"2O
0*14
O*22
0'17
0-14
O'2O
0-25
0-19
Bonn 654 ' E
v Andromedse I E
W.B. (2)0. 1172 | E
ft, Andromedse E
2 Ursse Miiioris E
2 Ursse Miiioris ' W
Polaris.
Polaris
X Andromedse ..
Bonn 1434
Lalande 3149 ...
Piazzi I. 170
a Triauguli
A Arietis
e Trian<*uli
a Arietis...,
10
9!
10*080
8-894
6-303
9'333
8-857
lo'oSo
-43- 57'13
o. 44. 29*32
o. 48. 9*90
0.51.23-56
-55*43'33
-55-
57*08
29*27
9*83
23-5
! 46-15
I
i 45-45
3-15 13*59
i. 24.49*84
1.33.33*06
i. 35-53' 8 4
i. 38. 18*76
42.56*41
34-02
32-30
18-89
I
1.47,
1.52.
1.57.
2. 1.43*19
10*16
33-34
54*09
18*90
56*60
34''4
32-37
19*04
43*26
2 9'43
10*05
23*66
46-19
46*19
11*02
33-69
54'44
19-22
57-02
32-68
19*41
0*21
0*16
O*22
O'l6
0*74
2 '57
0*86
0*35
"35
0-32
0-42
0*34
0*31
0-37
0-30
0'2I
0*16
0*22
0*l6
0*36
0*36
'33
0*43
'35
0*32
0*38
0*31
1902 November 3.
Paris.
Bradley 1399 S.P ; E
Bradley 2993 I E
8 Lacertae E
10 Lacertae ' E
12 Lacertse 'E
13 Lacertas .
A Pegaai
/i Pegasi
Groombridge 3919
o Andromedse
Pegasi
56 Pegasi
Bradley 3147
Br.idley 3147
K Andromeda}
78 Pegasi
W.B. (2) XXIII. 907
Bradley 3212
a Andromedie
23 Andromeda;
Piazzi 0. 13
Bradley 1672 S.P
Bradley 1672 S.P.
9-37I
10*080
E 10 '
10-685
5-899
lo'oSo
9*388
8*540
22.15.
22. 21.
22.31.
22. 34.
22. 37.
22. 39.
22. 41.
22.45.
22. 49.
22. 57.
22. 59.
23. 2.
23. 28.
28*35
16*65
34-20
55' 2 9
8-98
46-84
5 '31
19*96
41*08
28*51
5''7
24*13
8*40
23. 28. 3-74
23.35.38*67
2 3- 39- 7'34
23- 44- 49'2
- i-35"5 2
o. 3.23*12
o. 8. 29*46
o. 9. 30-45
o. 13.51*79
o. 13. 41*30
25*19
20*20
34*26
55-34
9-04
46*91
52*23
19*89
41*14
28*59
5-13
24*07
13-27
12-32
39*06
7-54
49*30
3572
23*32
29*80
379
3577
32*08
26*41 +1*22
19*04 , ri6
34*25 i o'oi
9*04
46*92
52*23
20*00
41-14
28*61
5-i4
24*07
12*64
12*64
39' 2 3
7-76
49'45
35-84
23-52
3'3
30*91
33'45
o'oo
O'OI
o'oo
O'l I
o'oo
0*02
O'OI
-j-o'oo
0-63
+0-32
0*17
O - 22
0-15
O"12
O'2O
0-23
+0'I2
2-32
O'O2
+0-07
O'OO
O'OI
+0*10
O'OI
o'oo
0*00
0*17
O'22
0*15
0*12
O"20
0-23
+0'12
33'45 +''37
28 Andromedse ....
Pia>.;;i 0. 103
8 Andromedse
Piazzi 148
Groombridge 140
W.B. (2)0. 1172..
/j. Andromedse
2 Ursse Miuoris...,
2 Ur.e Minoris...,
T Piscium
<t> Piscium
Piazzi I. 29
v Piscium
Andromedse......
47 Andromedse ....
Polaris....
Polaris
Polaris
Piazzi I. 170 ,
a. Trianguli ..
Bradley 253 .,
Lund 870
\ Arietis
e Triauguli ..,
a Arietis....
W
W
W
W
\vj
W
wi
W|
W
W
W
W
W
E
E
E
E
E
10*080
9*548
5-537
10*080
10*706
11-367
14*366
10*080
0.25.
0.27.
o. 34.
o. 36.
0. 39.
0.48.
0.51.
0.55.
0.55.
1. 6.
i. 8.
i. 10.
I. 14.
i. 16.
i. 18.
1.24.
1*14
42*91
9*28
28*16
497i
9*58
23*12
38*90
38-47
20-08
29-75
55-34
8*95
38*93
8*74
42*97
1.24. 57*22
i. 25. 0*74
i. 42. 56*98
'47- 34'49
i. 50. 1 1 '64
i. 50. 25*16
1.52.32*70
1.57. 19*29
1.43-51
2.
'"34
43*10
9-50
28-32
50-11
4*87
2 3"43
45-35
44-92
20-29
29*91
55-59
9*13
39'34
9*03
6*05
10*42
'3"94
57*02
34-45
1 1*67
25*19
32*62
19*29
43'43
1-46
43-26
9-67
28-50
50-29
10-05
23-65
46-11
46-1,
20-42
30*18
5574
9*41
39"5 6
9-24
10-89
10-89
10*89
57"3
34'49
11*77
25*20
32*69
19*41
43'5 6
+0*12
0*16
0*17
0*18
0-18
0-18
0-22
0*76
1*19
0*13
0*27
0*15
0*28
O'22
O*2 1
+"47
-3-05
-(-O'OI
0*04
O'lO
O'OI
0-07
0"I2
-j-0'12
0*16
0*17
0*18
0-18
o'i8
0*22
0*14
0*28
o'i6
0*29
0-23
0'22
+0*02
0*05
0*11
O'O2
o'o8
0-13
+0 '4
STAR- TRANSITS OBSERVED BY MR HOLLIS WITH TRANSIT C., AND RESULTING CLOCK ERRORS.
297
Star's Name.
Position.
No. of Wire
t SJ
Observed
Transit.
^j
H
Sf .
ill
<
ill!
u|S3
Star's Name.
Position.
|
5
O
;
i i
-< | Transit
p> 9 Observed.
.2 j
Corrected
Transit
_ .
If
|||
ftto
<!
isHsjj
IP
1902 November 4.
Paris.
Bradley 1399 S.P
Bradley 2993
Grmuiibridge 3804
8 Laoertse
10 Lacertie
12 L.ioertse
13 Laeertfe
A IVgasi
fi I'egasi
15 Lacertae
Groombridge 3919
67 Pegasi
1 3 Andromeda? .
Bradley 3147....
Biadley 3147.
K Andromedse
78 I'egasi
W.B. ( 2 )XX1II. 907
Groombridge 4159
1(1 I'egasi
Bradley 1672 S.P
Bradley 1672 S.P.
10
9 ' 10-596
9 io'o8o
9
9
9
8 io'o8o
9 ,.
10 8-172
6 '537
9 , io'o8o
9 '
7
9
9
10-048
11-846
22. 15.
22. 21.
22.28.
22. 31.
22. 34-
22. 37-
22. 39.
22. 41.
22. 45.
22. 47.
22. 49.
32-27
I2-62
9'59
3 3 '9
55-3
8-65
46-55
52-14
"975
4O'2I
4073
23. 2O. 7'2O
23. 22. 28-28
23. 28. 8'59
*3- z8 - 3'45
23.35.39-18
23- 39- 7'97
23.44.49-60
23.49. 10-77
23.52.50-13
o. 13.4172
o. 13. 51-26
26-99
18-83
9-86
34''7
55' 2 9
8-92
46-84
52-24
19-85
40-52
4i"oo
7'3
28-30
26-65
1877
9-98
3O4
55'4'
9-03
46-91
52-22
19-99
40-62
41-12
6-94
28-16
12-37
ir8o I 12-37
39-22
7'87
49-56
10-76
50-01
3277
39-22
7 ' 75
49'44
1078
49'99
33-82
35'S' ! 33' 8 3
0-34
o'o6
+0-12
O'O7
O'12
O-II
+ 0-07
O'02
+0-14
O'lO
+O'12
0-14
0-86
+'57
o'oo
O'l2
O"I2
+0'02
O"O2
+ 1-06
1-68
-(-O'l I
o'o6
o'i i
o'io
0-03
+0-13
O'lO
+0-12
o'oo
0'12
O"I2
+0'02
O'02
Piuzzi 0. 148
Groombridge 140 .
Bonn 6^4.
W.B. (2)0. 1172 .
v Andromedse
2 Ursa; Minoris...,
41 Andromedse ...
j8 Andromeda;
T I'ist'ium
<f> Piscium
v Piscium
f AnUroinedse
47 Andromedse ....
Polaris....
Polaris
X Andromeda.
lionn 1434
Lalande 3149 ..
Piazzi I. 170 ...
a Trianguli
Bradley 253....
Lund 870
\ Arietis
o Arietis
/3 Trianguli
7 Trianguli
io'o8o
11-402
10 080
9-370
8-756
o. 36. 28-59
o. 40. 50-34
0.43.57-38
o. 48. >o"i8
o. 44. 29-52
o. 55.43-10
2. 28-46
4- '9'45
6. 20-59
8. 30-41
'4- 9'5 6
. 16. 39-61
. 18. 9-25
24- 5 8 '93
. 24. 45-48
33- 33''5
35-53'92
. 38. 18-81
. 42. 56-61
47- 34'7
.50. 11-43
. 50. 24-88
.52.32-39
2. 1.43-41
2. 3.47-46
2. II. 34-04
28-46
10*15
29-52
4 6- 5 6
28-50
19-41
20-50
30-28
9-46
39-66
9-23
ii "6 1
8-04
33'4*>
54-22
1 8 '99
56-85
34"3 2
n-66
25-11
47^7
34-24
28-50
50-28
57-28
10-05
29.42
46-02
28-45
19-48
20-46
30-18
9-41
39'5 6
9-24
1071
10-71
33-70
54-44
19-22
57-03
11-77
25-21
32-69
43-57
+0-04
o'io
O'lO
O'lO
O'lO
0-54
0-05
+0-07
0*04
O'lO
0-05
O'lO
O'OI
0-90
+ 2 -6 7
0'22
0-22
0-23
0-18
0-17
o'i i
O'lO
O"2O
o'o6
0-13
+0'I2
+0-04
O'lO
O'lO
O'lO
O'lO
0-05
+0-07
0-04
O'lO
0*05
O'lO
+0'02
+0-23
0-23
0-24
0-19
0-18
O'lZ
O'll
0'2I
0*07
0-14
+0-13
XV. MEAN CLOCK ERROR.
Forming now the means of column 8 in the preceding pages for each group of clock
stars observed in positions of the instrument Micrometer West or Micrometer East
respectively, the result shown in the tables on pages 299 to 305 are obtained. The first
five columns require no explanation. In Column 6 the results of Columns 4 and
5 are corrected for systematic difference between the two positions W and E. To
obtain this Correction, the clock errors shown in the various groups on each day were
all reduced to the same epoch by applying the clock rates given on pages 306, 307.
The meaiis of the results W and E were then taken, weighting according to the number
of stars in each group, and the difference of these means formed for each day. These
differences are given in the following table, and assigning the weights to them shown
in the third column the mean differences are formed :
298 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Transit B.
Transit C.
Part I.
Part II.
Part I.
Part II.
Date.
W E.
Weight.
Date.
W E.
Weight.
Date.
W-E.
Weight.
Date.
W-E.
Weight
Pat is. Greenwich.
Greenwich. Paris.
s
s
s
s
Mar. 1 8
0-040
I
Sept. 21
+ 0-018
I
Mar. 17
+ 0-075
2
Sept. 21
+0-145
2
'9
+ 0^038
2
22
+ O'IO2
2
! 9
+ 0-053
2
22
+ 0-061
2
23
+ 0-035
2
23
O'OOI
I
20
+ 0-003
I
24
+ 0-062
2
25
+ 0-173
2
24
+ 0-161
2
ii
+ 0-033
I
26
+ 0-059
2
28
0-014
I
25
+ 0-090
1
22
+ 0-013
I
26
+ 0-130
2
23
+ 0-058
I
25
+ 0-207
2
27
+ 0-363
I
4T
28
+ 0-017
2
Greenwich. Pans.
Paris. Greenwich.
Apr. 6
0-003
I
Oct. 6
+ 0-071
I
Apr. 7
+ O'206
I
Sept. 29
+ 0-090
2
8
+ 0-079
2
7
+ 0-130
2
8
+0-219
I
Oct. 2
O'OI I
2
10
+ 0-170
1
8
+0-032
I
9
0-030
I
8
+0-036
2
12
+ 0-099
I
9
0-003
I
ii
O'OO2
I
9
+0-034
I
13
+ 0-140
2
10
+ 0-050
2
'3
+ 0-I70
2
IO
0-062
2
17
+ 0-028
2
13
+ 0-106
I
7
+ 0'I2O
2
12
+ 0-014
I
18
+ 0-109
2
4
+ 0-083
2
18
+ 0-124
2
'4
0-038
2
20
+ 0-067
1
16
+ 0-079
2
20
+ 0-065
2
15
+0-044
I
22
+ 0-063
2
17
+ 0-076
2
21
+ 0-069
2
16
+0-038
2
2 3
+ 0-142
2
21
+ 0-054
2
2 3
+ 0-163
I
17
O'OIO
2
*4
+ 0-168
2
22
+ 0-027
2
2 4
+ 0-040
2
18
+0095
2
21
0-OO2
2
22
+ 0-156
2
Paris. Greenwich.
Greenwich. Paris.
Apr. 28
+ O-I22
2
Oct. 26
+ 0-152
Apr. 27
+ 0-047
I
Oct. 25
-0-044
2
May i
+ 0-093
2
27
+ 0-215
28
+ 0-055
2
*7
+ 0-017
I
3
+ 0-058
2
2 9
+ 0-051 2
May i
+ 0-059
2
28
+ O'O2O
1
3
+ 0-008
2
+ 0-065
I
2 9
+ 0-II7
2
Nov. i
+ 0'I IO
3
+ O-OO2
2
31
+ 0-131
2
2
+ 0-043
Nov. 2
+ o- 1 1 6
2
3
+0-117
3
+ 0-146
2
4
+0-104
2
4
+ 0-193
2
Means
+ 0-087
3 2
+0-083
37
+ 0-086
38
+ o - o6o
45
The following corrections have therefore been applied in forming the corrected
Clock Error in column 6 :
For Transit B, in Part I. o Sl o43 to West groups, +O 8 -O43 to East groups.
in Part II. -0*042 +0^042
JT-jr Transit C, in Part I. o-o43 +o"O43
in Part II. -o^ojo +o 9 -O3O
The daily mean of the groups is now formed and the difference of each group form
the mean given in column 7.
CLOCK ERKOK.
Clock Error found by Mr Dyson with Transit B.
299
Date.
1902.
Mean
R.A.
of Group,
Number
of Stars.
Mean Clock
Error.
Corrected.
Difference
from
Mean.
Date.
1902.
Hen
R.A.
of Group.
Number
of Stars.
Mean Clock
Error.
Corrected.
Difference
from
Mean.
W.
E.
W.
E.
Mar. 1 8
Mar. 19
Mar. 23
Mar. 25
Mar. 28
Apr. 6
Apr. g
h m
9 49
10 51
1
6
5
'am G?ot'7
-46-872
46-908
c.
s
46-838
-47-013
-47-377
s
-46-915
-46795
s
-0-055
+ 0-065
+ 0-049
+ 0-030
-0-068
+ 0-028
0-032
+ 0-009
+ 0.068
+ 0-054
0-126
0-025
+ 0-048
-0-079
+ 0-042
0-042
Apr. 10
Apr. 1 2
Apr. 13
Apr. 17
Apr. 1 8
Apr. 20
Apr. 2 2
Apr. 23
h m
9 I
10 13
Green wicl
8
10
i Clock <.
s
-14-346
-14-641
-'4-753
-I5-453
-'5-54'
-15-590
-'5-552
-15-950
ontinued.
s
-14-510
-14724
14-860
-14-922
-15-531
-IS^SO
s
-14-467
-14-389
s
-0-043
+ 0-035
+ O-OO2
O'OOI
4 0-003
+ 0-030
-0-053
+ O-O22
+ 0-030
0-o66
o - oo8
O-OI2
+ 0-030
+0-013
0-014
0-009
10 17
6,5
46-860
9 41
10, 8
-14-424
7 29
9 '9
ii 3
8
12
II
-46951
-46-970
9 2 7
ii 54
9
1 1
14-681
14-684
47 025
-47-351
-47-440
-47-553
-47-607
enwich Clc
14-080
H"2O7
10 48
11,9
-14-683
9 2*7
19, 12
9 '
10 43
12 26
9
18
12
-14-817
-14-796
-14-879
8 20
9 44
10 52
IO
I I
7
-47-334
-47194
4/ 39
-47-512
-47-706
-47-566
>ck.
T? 353
10 52
18, 21
I A 'fi-1 A
9 3i
ii, 17
T/ J uz
9 32
1 1 29
12 51
8
16
IO
-15-496
-15-488
-15-584
7 3
9 6
ii '3
9
12
10
-47-469
-47-4 8 3
-47-663
II 26
18, 16
-I5-5I8
9 19
12, I 9
-47-537
9 2 3
10 52
12 14
9
18
9
-15-633
-15-637
-'5-595
10 57
12 19
13 I^
6
'3
6
-47 '59 6
i 7'C 7 2
T/ -> z J
-47-650
10 50
1 8, 18
-15-625
12 12
'2, 13
-47'57I
9 3i
i 35
8
7
9 12
10 41
&n
5
5
-16-377
16-320
16-461
16-561
-I5-993
10 5
7,8
-15-979
-14-274
-I4-I23
9 43
1 1 14
12 47
IO
'I
-'6-334
9 57
5,5
14-081
-'6-374
i
is 338
-16-277
+ 0-048
+0-031
+ 0-032
0-069
9 4i
1 1 19
12 53
7
15
7
ii 3
15, 16
-16-325
-14-183
-I4-23I
14-226
+ 0-003
+ O'oo8
9 33
ii 7
12 35
i!
10
-16-418
-16-417
16-518
ii 18
H, '5
-14-234
300
TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Clock Error found by Mr Dyson with Transit B. continued.
Date.
190*.
Mean
K.A.
of Group.
Number
of Stars.
Mean Clock
Error.
Corrected.
Difference
f i oni
Mean.
Date.
1902.
Mran
R.A.
of Group.
Number
of Stars.
Mean Clock
Error.
Corrected.
Difference
from
Mean.
W.
E.
W.
E.
Apr. 23
Apr. 24
Apr. 28
May i
May 3
Sept. 21
Sept. 22
Greemri'-)
h in
'3 8 4
13 29 2
i Clock c
s
16-400
16-504
- 16-551
'am Cloci
-5I-377
-51-564
-51784
-51-888
lentricli C
5-500
5-618
ontiuued.
s
16-580
16-720
s
-16-443
-'6-537
s
+ 0-006
0-088
0-078
+ 0-052
Sept. 22
Sept. 23
Sept. 24
Sept. 25
Sept. 26
.
Oct. 6
Oct. 7
h m
22 59
23 40
Greemoicli
1 1
2
Clock. (
s
5-630
5-623
5^74
5-616
5-701
5-671
^aris Cloc
3-I33
3-051
3-093
ontinued.
s
5-53 6
5-624
5-486
5-610
S'474
5-608
fc.
3-059
2-928
5-578
5-588
s
+ O-QIO
+ 0-020
0-031
40-054
+ 0-065
-0-039
+ 0-007
0-003
+ 0-004
0-091
+ 0-O22
+ 0-043
0-004
+ o - oo6
+ 0-018
0-021
+ 0-060
I I 26 22, 21
-16-449
21 32
1 8, 19
5-568
1015 8
II 27 14
12 37 , 10
13 13 7
-16-677
-16-547
21 39
22 7
8
5
5-581
5-666
ID 057
fc.
- 5 I- 4 8 7
-51-508
-5I-643
-51-668
-51-894
oek.
5-480
5*49
-16-594
+ 0-005
O'OOI
+ 0-023
O O22
+ 0-OO9
+ O'OO2
O'Ol6
+ 0-038
+ 0-014
0-066
+ 0-044
0*030
0-036
+ 0-008
21 50
8,5
5 -6 1 2
1 1 49 21, 18
-16-599
20 3
22 O
23 39
10
18
9
5-632
5-528
5'574
'I 5
12 47
H 3
I
7
13
13
- 5 i '444
-51-420
-51-465
21 52
19,18
5-567
I 9 51
2O 41
IO
8
5-652
5-659
13 3
13, 20
-5''443
2O 13
8, io
5^55
I I
12 44
13 46
9
20
8
51-600
-51-607
-51-625
19 53
21 46
23 io
8
17
8
5-5i6
5-629
5-650
12 32
20, I 7
51-609
21 39
17, 16
5-607
io 53
12 14
13 2 5
9
17
9
-51-827
-51-851
-5 1 '93 1
21 9
22 19
j
IO
7
3-091
3-101
12 II
1 8, 17
-51-865
21 9
23 o
Or
2
3
5'532
5-458
21 38
10,7
3-095
21 56
23 19
o 30
il
3
3-009
2-970
3-051
22 l6
5-488
19 42
21 II
8
16
5-532
5-576
23 o
12, 16
2-991
CLOCK ERROR.
Clock Error found by Mr Dyson with Transit B. continued.
301
Date.
1902.
Mean
R.A.
of Group.
Number
Mean Clock
Error.
Corrected.
Difference
from
Mean.
Date.
1902.
Mean
R.A.
of Group.
Mean Clock
Number Error '
Corrected.
Difference
from
Mean.
W.
E.
W.
E.
Oct. 8
i ,/ . i
Oct. 9
Oct. 10
Oct. 1 3
Oct. 1 4
Oct. 1 5
Oct. 1 6
Oct. 17
h m
23 2
23 50
Paris
10
6
Clock co
s
2793
2-619
2-384
2-344
2-380
2-117
1-956
2-018
1-632
1-727
1-546
1-620
ntinued.
s
2-767
2-631
2-348
2-291
2-014
1-909
1-671
1-597
1-638
''493
1-475
s
2-809
2-751
M
+ 0-022
0-036
+ 0-048
0-048
o-ooo
+ 0-048
0-040
0-009
0-004
O-OI2
+ 0-OO7
-0-039
O'OO2
+ 0-023
-0-059
Oct. 21
Oct. 22
Oct. 25
Oct. 26
Oct. 27
Oct. 29
Oct. 30
Nov. i
h m
21 22
22 54
o 30
Paris Clock co
s
8
19 0-975
7
ntinued.
s
0-940
0-899
0-901
s
0-982
Q'933
0-941
s
+ 0-036
0-013
23 20
6, 10
2-787
-0-077
+ 0-029
+ 0-037
+ O-OO2
+ o-oiz
zz 52
'9. '5
0-946
20 50
2 1 50
9
9
2-673
2-577
O I I
2 5
* 55
9 o- 8 79
i5
7 o-993
0-837
o-943
0-951
21 2O
9.9
2-625
21 8
21 46
22 40
23 21
23 50
5
8
7
9
5
2 "34*
2-390
2-302
2 -333
z'338
i 43
1 6, 15
0-914
o 16
Greenwch Clock.
13 4-958
4-916
22 35
>7, 17
2'34 2
2-056
2-075
o 25
13
4-720
4-717
4-835
4-799
4-619
4-914
21 I
21 45
7
12
39
i 3
9 4- 8 72
2
4-830
4-762
21 29
'?
2-068
0-056
0-066
+ 0-066
0-009
+ 0-015
0-025
+ 0-054
0-026
+ 0-013
0-014
21 4
22 27
O I
7
20
13
1-914
1-951
1-976
o 43
9> 2
4-818
38 II
I 47 II 4-933
4759
4-891
22 43
20, 20
''953
I 13 n, II
4-825
22 24
8
1713
21 55
23 18
o 47
10 4-895
19
8 4-879
4-853
4-877
4-837
o 19
I 21
2 14
2 41
6
12
Q
5
i 590
1-639
1-685
1-680
+ 0-036
+ 0-03I
+ 0-013
0-018
0-005
+ 0-056
23 15
18, 19
4-862
21 49
23 '7
IO
21 4'803
4-841
4-761
' 37
15, '7
i 649
21 23
22 29
I
o 46
9
'7
10
4
1-535
1-504
1-517
1-578
22 49
21, IO i
4-787
22 33
23 20
9 4-73
8
4-688
4-661
22 5 I
21,19
1-522
22 55
9,8
4-675
GREENWICH OBSERVATIONS, 1902.
2q
302 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Clock Error found by Mr Dyson with Transit B. continued.
Date.
1902.
' Mean
R.A.
of Group.
Number
of Stars.
Mean Clock
Error.
Corrected.
Difference
from
Mean.
Date.
1902.
Mean
B.A.
of Group.
Number
of Stars.
Mean Clock
Error.
Corrected.
Difference
from
Mean.
W.
E.
W. E.
Nov. 2
Nov. 3
Mar. 17
Mar. 1 9
Mar. 20
Mar. 21
Mar. 22
li m
21 53
22 39
Greenwich Clock c
s
9 4732
8
ontiuued.
8
4-688
4-582
Clod
ick.
-11-736
11-916
12-030
12-114
-12-247
-12-434
-12-365
s
4-690
473
s
0-019
+ 0-O21
0-012
+ 0-017
und by A
0-005
+ o'ooS
Nov. 4
Ir Hollis '
Mar. 2 3
Mar. 2 5
Mar. 27
Mar. 28
Apr. 7
li m
22 54
23 3 6
35
1 10
I 40
Greenwich
8
'5
9
8
7
Clock continued.
.s s
4-600
4-479
4-468
4-577
I
i Clock continued.
-12-481
-12-544
1 2-7x8
s
4-521
4-516
4-510
s
+ 0-031
o'oo6
22 15
9,8
4-695
enwich Cl
1 1-663
4-709
0-017
+ 0-008
o-oii
+ O-OI2
0'OO2
+ 0-064
0'II2
+ 0-II5
0-156
+ 0-127
o'oiS
- 0-035
4- 0-067
0-058
-f- 0-047
22 19
23 I 4
9
6
4-624
o 15
24,23
4-527
pith Trail
8 37
9 5
*it C.
Greemric)
8
8
-12-524
12-501
23 7
6,9
4-636
8 10
9 3
" 55
Gre
7
12
8
Error fc
1 1-706
-11-693
11-858
11-867
O-O12
-f- 0-016
0-O2I
+ 0-075
9 14 8,8
9 5'
15, 12
11-701
12513
86 9
9 30 16
io 52 9
7 44
9 16
10 43
8
17
9
1 1-901
-11-873
1 1-910
i i 740
-12-596
12-858
-12-787
-13-144
-12-775
-13-032
-12-963
-12-947
^aris Clock.
-48-230
-48-039
-12-639
12-815
9 29 1 6, 1 8
i z 703
9 16
17, 17
-11-889
8 37
9 53
io 46
7
10
6
12-830
12-818
8 23
9 29
' 34
7
IO
5
-11-987
12-214
12-212
-12-397
12-071
o 047
o'oog
O'O22
+ 0-031
O"O2O
+ 0-016
- 0-033
+ 0-085
9 44
13, io
-12-945
9 9
10, 12
12-062
8 18
io 8
12 15
6
'4
9
-12-989
8 25
9 39
io 35
5
7
5
-12-257
12-204
-12-255
I 2 -904
io 24
'4, '5
-12-971
9 34
10,7
-12-235
io 6
12 17
I
8
10
48-187
-48-082
7 57
9 '3
> 43
7
'4
4
-12-391
-12-440
12-322
9 6
14, n
-12-407
ii 18
io, 8
-48-129
CLOCK ERROR.
303
Clock Error found by Mr Hollit with Transit G. continued.
Date
1902.
Mean
R.A.
of Group.
Number
of Stars.
Mean Clock
Error.
Corrected.
Difference
from
Mean.
Date. R "
I<3 2 - : of Group.
Number
of Stars.
Mean Clock
Error.
Corrected.
Difference
from
Mean.
W.
E.
W.
E.
Apr. 8
Apr. 9
Apr. 1 1
Apr. 13
Apr. 14
Apr. 1 7
Apr. 1 8
Apr. 1 9
h in
10 47
ii 47
Paris (
9
2
Hlock cor
8
-48-OZ4
-48-475
-48-505
48-614
-48-741
48-900
-49-368
tinued.
s
-48-250
-48-377
-48-553
-48-864
-48-948
-49-496
-49-539
-49-605
s
48-067
-48-207
s
+ 0-025
0-115
-T-O-I 14
0-070
-0-054
+ O-QIO
+ 0-048
0-099
+0-007
+0-044
-0-077
O'OOO
+ 0-024
0-018
+ 0-011
+ o"oo6
+ 0-017
0-060
Apr. 20
Apr. 2 1
Apr. 23
Apr. 24
Apr. 27
Apr. 28
May i
h m
10 29
12 26
13 10
Paris
9
ii
9
Clock cor
s
-49-543
itinued.
s s
-49-586
49*665 49'622
J.Q"6Q7
+ 0*048
+ 0-012
0-063
4-0-089
0-094
+ 0-053
0-031
O'OI I
0-024
+ 0-051
+ 0-026
0-026
4-0-009
0-036
+ O'OI2
+ 0'OI2
0-050
+ 0'OI5
+ 0-027
10 58
9. 2
49-620
-49-773
-49-920
12 4
1 8, ii
-49-634
IO
ii ii
12 37
9
10
6
-48-518
-48-502
IO 46
12 17
'3 9
9
16
7
-49-608 -49-565
-49-663
4.Q-7QI J.Q'74.8
ii 6
10, 15
. 0. . .0
12 3
16, 16
9 34
I I O
12 37
6
9
5
48-510
-48-657
1 1 19
12 47
9
15
49-816
-49-943 -49'9
10 58
9, 'I
-48-558
12 14
9, 15
-49-869
9 48
ii 55
'3 34
8
16
10
-48-821
-48-784
-48-905
I I 22
12 51
H 7
9
'7
10
-49'993:-49'95
-49-963
-49'93i -49-888
ii 54
16, 1 8
48-828
12 49
17, 19
-49-939
9 36
A
-48-943
I I 22
12 28
13 9
Greenwich Clock.
6 17-098 ; 17-055
9 17-064 17-107
8 17-115 17-072
9 36
-48-943
9 49
1 1 56
13 12
9
16
8
-49-411
-49-453
12 38
9, H
-17-184
-17-136
-17-521
17-081
49 38i
-49-442
-49-55
49 4 2 4
10 44
13 31
13 53
9
17
9
-17-227
I7"222 17'I7Q
I I 40
17, 16
-49-435
IO 22
12 I 3
13 30
10
17
-49-496
-49-485
-49-562
-I7-I79
12 54
18, 17
-I7-I9I
ii 4
12 29
13 54
8
12
8
-17-641
ii 54
17, 16
-49-502
10 3
2
-49-593
-17-619 -I7-576
-17-564
2
-49-593
12 29
I 6, 12
,-17-591
304 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Clock Error found by Mr Hollia with Transit C. continued.
Date
1902.
Mean
R A.
of Group.
Number
of Stars.
Mean Clock
Error.
Corrected.
Difference
from
Mean.
Mean
Date R A.
'9 02 ' of Group.
Number
of Stars.
Mean Clock
Error.
Corrected.
Difference
from
Mean.
W.
E.
W.
E.
May 2
May 3
Sept. 2 i
Sept. 22
Sept. 24
Sept. 26
Greenwic)
h m
1210 6
12 55 10
13 41 8
i Clock c
-17-627
-17-950
-17-873
'aris C/oe/i
0-881
0-887
- 0-888
- 0-818
- 0791
- 0-618
- 0-547
ontinueil.
s
-17-630
-17738
-17-921
-17-587
-17-670
-17-695
s
+ 0-071
O-OI2
-0-037
-0-074
+ 0-041
+ 0-OO3
+ 0-052
h in
Sept. 29 20 45
21 49
22 40
Ore
9
H
5
enwic/i Cli
s
5-507
5>59
4-565
4'55 6
4-603
4-636
4-615
4-768
4-815
4-623
)C/f.
s
5-433
5-388
5-505
5-434
4'5'7
4-544
4-573
4-687
4753
4-762
s
5-4 6 3
5-477
5-4.8
H
+ 0-001
+ 0-015
-0-044
+ 0-071
-0-035
O'OOO
+ 0-002
o-oio
+ O'O2g
0-019
0-012
+ 0-OI8
0-052
+ 0-059
12 59 10, 14
1
-17-658
21 38
'4. H
5-462
13 2
14 o
H 57
15 16
10
16
7
i
-17-993
-.7-878
-17-916
-17-867
Oct. 2 20 49
2 1 50
22 41
i
8
16
8
5'535
5'4 2 9
5-464
'/ 9*
21 48
16, 16
5-464
13 57
17, '7
17 919
Oct. 8 20 41
*' 53
22 56
1 1
'3
8
7
4-547
4-535
4'574
4-526
20 24
22 49
Z3 46
^
8
'5
3
22 K
20, 19
4-545
i 049
- 0-973
- -949
0-867
0-641
0-680
- 0-911
- o-943
+ 0-037
+ 0-005
+ 0-001
o-ooi
o-ooo
0'OI2
0'OOI
+ 0-015
+ 0-023
0-014
0-016
+0-057
Oct. 9 21 32
2 ? 2O
10
7
4-573
4-603
22 I I 1 5, I I
o 94
22 l6
'o,7
4-585
'9 4-5
21 24
23 7
7
16
9
- 0-917
- 0-919
- 0-918
Oct. 10 21 I
33
*3 56
9
20
10
4-606
4-7I7
4-585
21 32 1 6, 16
o 073
+0-027
O-ni R
22 28
19, 20
4-658
22 56 9
oo 14
o 59 8
- 0-848
- 0-837
- 0-821
1 >Ct. 12 20 56
21 50
8
12
4783
4738
+0-041
+0-048
0-151
23 57 17, H
0-836
21 28 12,8
4-756
22 6 8
22 58 I 3
051 10
i 39 3
0-611
- 0-648
0-650
- 0-577
Oct. 14 21 1
22 27
23 50
10
20
9.
4-785
4-792
4-593
23 33
16, 18
- 0-634
22 24
19,20
4-744
CLOCK ERROR.
Clock Error found by Mr Holliswith Transit 0. continued.
305
Date
1902.
Mean
R.A.
of Grou|>.
Number
of Stars.
Mean Clock
Error.
Corrected.
Difference
from
Mean.
Date
1902.
Mean
R.A.
of Group.
Number
of Stars.
Mean Clock
Error.
Corrected.
Difference
from
Mean.
W. E.
W.
E.
Oct. 1 5
Oct. 16
Oct. 17
Oct. 1 8
Oct. 2 1
Oct. 22
Oct. a 5
h in
21 5 1
*3 7
(jfreenwicl
"O
4
1 Clock c
8
4-853
4-864
4-860
4-870
4-933
4-873
5-005
4-869
5-000
4-993
'art's Cloc/i
0-779
1-069
ontinued.
s
4-806
4-786
4-856
4-897
4-830
4-825
4-898
4-831
4-838
4-850
0-967
4 S -8 3 6
4-823
8
+ O'oo8
0-005
0-027
0*009
+ 0-043
Oct. 27
Oct. 28
Oct. 29
Oct. 3 1
NOV. 2
Nov. 3
Nov. 4
Paris (
h in
23 15 8
o 46 10
7lock con
s
0-850
0-751
0-661
0728
o-533
0-266
0-345
0-184
0-092
0-158
tinued.
s
0-839
0-734
0-577
0-343
0-490
0-187
0-O22
0^069
0-063
s
0-869
0-820
. s
+ 0-027
O'022
0-028
+ 0-015
O-O04
0-028
+ 0-063
0*094
+ 0-036
+ 0-053
O-OI5
-0-034
+ 0-064
0-064
+ 0-038
0-OI7
+ 0-028
0-067
+ 0-094
22 35
14, 10
4-828
06 10, 8
0-842
21 6
22 9
2 3 55
o 43
8
H
10
6
4-816
4-834
4-886
4-830
23 41 7
o 25 13
0-721
0-764
0-052
+ 0-035
+ 0-01 1
0-015
0-032
0-O20
+ 0-100
+0-058
0-031
O'oog
+ 0-056
0-046
+ 0-049
-0-034
-0-195
+ 0-053
+ 0-095
08 7, 13
0-749
22 48
20, I 8
4-843
22 8
23 53
I IO
8
'7
8
0-631
0-607
0-698
21 35
22 55
23 40
12
'7
4
4-840
4-927
4'93
23 46
16, 17
0-635
22 31
16, 17
4-892
22 32
6
I IO
10
16
7
0-373
0-503
0-520
22 12
23 2
23 50
33
1 1
13
6
4-860
4'843
4-855
4-9/5
*3 5'
1 6, 17
0-467
23 38
17, H
4-875
23 46
37
, 46
9
1 1
8
0-236
0-217
0-315
21 46
23 22
o 37
12
20
8
4-928
4-839
4-861
23 8
20, 20
4-870
o 40
17, ii
0-251
21 3 1
22 50
23 54
1 5 2
'3
8
5
4-970
4-868
4'9 6 3
4-880
22 46
o 31
I 52
10
20
7
0-052
0-154
0-099
23 17
15,18
4-914
o 18
20, 17
O'l l6
22 37
o 27
I 10
;
7
13
7
0-749
0-997
1-039
22 40
o 29
I 50
9
9
1 1
+ 0-062
- 0-033
+ 0'128
o 42
20, I 9
+ 0-034
O IO
H. '3
0-944
306 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
XVI.- CLOCK RATE.
From comparison of consecutive clock-errors thus determined, the rates of the
clocks in the interval have been deduced and are set down in the second and sixth
columns of the following Table. The clock- rate adopted for each day given in
Columns 3 and 7 is in general the mean of the figures preceding and following in
Columns 2 and 6. In the case of the Sidereal Standard the rates found from
observations with the Greenwich Transit- Circle have been added for comparison.
Parti.
Part II.
Date.
Sidereal Standard at Greenwich.
Date.
Normal Clock
at Paris.
Date.
Sidereal Standard at Greenwich.
Date.
Normal Clock
at Paris.
Hourly Rat
from Star 1 . ,
Obs Adopted.
e
by the
T.C.
Observer.
I
from Star
Obs.
lourly Ral
Adopted.
e
by the
T.C.
Observer.
Hourb
from Star
Obs.
Rate
Adopted.
Hourly
from Star
Obs.
Rate
Adopted.
I 9 02.
s
s
1902. s
s
1902.
s
s
s
1902.
s
8
Mar. 1 7
o - oo6
0-003
Mar. 1 8
0-006
Sept. 21
+ 0-004
+ 0-000
Sept. 21
+ 0-001
0-004
0-006
+ 0-004
+ O'OOI
'9
0-006 0-007 '9
0-005
22
+ 0-003
+ 0-OO2
22
+ O'OO2
0-007
0-004
+ 0-OO2
+ O'OO2
20
0-007
0-004
23
0-004
23
O'OOO
+ O-OO2
H
+ 0-O03
0-007
0-004
O-OO2
+0-004
21
0-007
0-005
25
0-O02
24 +0-001
+ 0-OO3
26
+0-004
0-007
1 O'OOI
+ 0-004
22
0-006
0-005
28 :
O-OO2
25
+0-001
+ O-OO I
0-004
O'OO2
1 O'OO2
Oct. 6 0-003
23
0-004 0-005
26 O'OO2
0-003
0-004
0-004
April 7 I
0-OO7
I O-OO2
7
0-006
25
0-005
0-005
+ O-O02
j
0-008
0-005
8
O-O07
29
O'OOI
-0-003
8
0-008
27
0-003
0-004
O-OI5
+ 0-000
0-007
o-ooi
9
O-005
Oct. 2
0-003
O-OO3
9
0-009
28
0-003
0-006
0-OO5
o-on
o-oo;
ii
0-OO5
8
0-003 0-003 IO o - oo8
J
O - OO5
; +O'OO2
-0-004
April 6
0-003
13
0-OO5
9:
+ 0-003
+ 0-000 13 0-004
0-003
O-OO5
: +0-003
0-005
8
0-003
0-005
H
0-005
Oct. 10
+ 0-003
+ 0-000
Oct. 14
0-007
0-004
O-007
+ O-OO2
O'OIO
10
0-005
0-005
17
O-OO5
12 +O'OOI ! +O'OO2
'5
0-006
0-005
0-003
O'OOO
0-OO2
12
0-006
0-005
18
O-OO3
'4
+ O-O02
+ 0-003
16
0-004
0-006
O-OO4
+ O-004
0-006
>3
0-007 0-004
'9
0*003
15
+ O-OO2
+ 0-000
17
o - oo6
i 0-007
O-OO2
+ 0-001
0-006
17
0-006 0-006
20
O'OO2
16
+ 0-OO2
+0-001
21
0-004
0-005
0'OQI
+ O'O02
O'OOI
18
o'oo6 0-006
21
0-003
17
+ 0-001
+ 0-003
22
O'OOI
0-007
O-OO4
0'QOI
CLOCK
Clock Mate-
RATE.
-continued.
307
Parti.
Part II.
Sidereal Standard at Greenwich.
Normal Clock
Sidereal Standard at Greenwich.
Normal Clock
at Paris.
at P
n ria
Hourly Rate.
Hourly Rate.
Date.
Date.
Hourly Rate.
Date.
Date.
Hourly Rat*.
from Star
Obs.
Adopted.
by the
T.C.
Observer.
from Star
Obs.
Adopted.
from Star
Obs
Adopted.
by the
T.C.
Observer.
from Star
Obs.
Adopted.
1902.
S S 8
1902.
s
s
1902.
s
s s
1902.
s
8
April 20
0-007 0-006
April 23
0-004
Oct. 1 8
O'OOI O'OOO
Oct. 2 5
0-002
0-007
0-003
o-ooo
O'OO2
22
1 o - oo6
0-007
24
0-004
21
+ 0-001 0-003
7
0-004
0-005 1
+ O'OO2
O'004
23
O'Oo6 0-008
22
-T-O'OOl O'OOI
28
0-005
o'oo6
28
0-004
O'OOI
0-005
24
0-007
O'OOS
O-OO2
2 9
0-004
26
+ O'OOI
0-003
0.007
May i
0-004
o'Ooo
31
0-004
27
0-005
0-004
0-OO5
27
+ O'OOI
o-ooo
0*004
0-005
3
o 004
-l-o-ooi
Nov. 2
0-005
28
0-005 ~ 0-004
29
o-ooi.
O'OOO
0-006
0-005
0-003
"3
0-005
May i
0-004
0-005
30
0-003
O'OOO
0-004
0-003
O'OO2
4
0-004
2
0-007 0-009
Nov. i
O'OOI
O'OO2
O'OIO
+ O'OOI
3
0-007
0-008
2
O'OOI
-0-003
0-003
3
0-004
0-003
0-004
4
0-004
0-004
XVIL EXCHANGES OF SIGNALS.
The signals for comparison of the clocks at Paris and Greenwich were made by
means of the apparatus mentioned in Section VI. of this account. After the necessary
connection had been made by insertion of the plugs in the appropriate holes of the
commutator an exchange was begun by the observer at Paris depressing his sending
key for one minute, during which each observer adjusted the resistance of his rheostat
so that the needle of the galvanometer showed the same deflections as it had when he
had been observing star-transits. This being completed, the observer at Greenwich
depressed his sending key and the process was repeated. The observer at Paris then
sent twenty signals at arbitrary intervals, the signals being usually separated by about two
seconds. The observer at Greenwich then sent forty signals, and the exchange was
completed by the Paris observer again sending twenty. In all cases of receiving and
sending the resistance in the rheostat was adjusted to the amount found necessary
by the preliminary trial. Two such exchanges were made on each night when observa-
308 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
tions were made at both stations. In the following Tables, the first three columns
require no explanation. Columns 4 and 5 give the differences of the clocks in the sense
East-West as found by the mean of each set of signals. Column 6 is the mean of the
times in column 2 weighted according to the number of signals. Column 7 is found by
forming the means of the differences similarly weighted in columns 4 and 5, and then by
taking the mean of these weighted means. The last column is the half difference of the
weighted means, and shows the time of transmission of the signals.
Difference of Sidereal Standard and Normal Clock at Paris by Signals sent from
Paris and Greenwich.
Date.
Greenwich (Number
Sidereal of
Time. Signals.
Difference of Clocks by
signals sent from
Mean of each Exchange.
Time of
Transmission.
Greenwich
Difference
Paris. Greenwich.
Sidereal Time.
of Clocks.
1902.
h m
m .s m s
h m
m s
s
March 1 8
832
16 9 56-249
833
834
18
20
956-304
9 56-281
832-3
956-271
O'O22
I 1
6 9 56-245
ii 6
'9
956-283
II 4-0
9 56-263 o-oto
ii 9
5 95 6- 238
March 1 9
845
10 9 56-266
847
848
16
16
9 56-306
9 56-299
847-8
9 56-284
0-0,9
8 50
19 9 56-265
ii 31
10 9 56-255
1134 16 9 56-304
1137-8 956-283
0-022
1141 15 9 56-268
ii 44
19
9 56-260
March 20
832
16
956-219
834
835
16
'5
9 56-248
9 56-H5
8 34-8 9 56-236
o-o 10
837
24
956-230
March 21
9 9
18
9 56-078
911
912
20
'9
956-125
9 56-1 ii
9 1 1-7
9 56-096
0-O22
. 9 '5
20
9 56-070
March 22
822
17
956-053
824
825
15
15
9 5 6 '93
824-9
956-075
O'020
828
15
956-057
i
i -
EXCHANGES OF SIGNALS.
309
Difference of Sidereal Standard and Normal Clock at Paris by Signals sent from
Paris and Greenwich continued.
Date.
Greenwich
Sidereal
Time.
Number
of
Signals.
Difference of Clocks by
signals sent from
Mean of each Exchange.
Time of
Transmission.
Greenwich
Difference
Pdris.
Greenwich.
Sidereal Time.
of Clocks.
1902.
h in
m s
m s
h m
m s
s
March 2 3
9 16
20
9 56-046
917
9 18
18
'9
9 56-092
9 56-085
917-8
9 56-069
0*019
9 20
20
9 56-053
11 55
'5
95 6 '43
ii 57
ii 58
'9
18
9 5 6 "97
9 56-083
II 57-6
9 56-068
O-022
12
'9
9 56-049
March 24
835 18
9 56-009
8 37 20
8 38 20
9 56-067
9 56-064
837-2
9 5^-032
0-034
839
'9
9 55-986
March 2 5
9 4
18
955-982
9 6
9 7
20
21
9 56-023
956-013
9 6-3
9 56-000
O'OlS
9 8
18
955-9 8 4
I I 21
>9
9 56-022
I I 22
11 2 4
21
18
955'979
9 56-016
1 1 23-0
9 56-000
O-O20
11 23
2 I
9 55-98
March 26
8 36 20
9 S5-94I
8 37 21
8 39 18
95593
955-938
839-8
955-920
0'O2O
847
18
9 55'897
March 27
9 8
18
955-867
9 10
9 <>
18
18
955-908
955-902
9 io-6
955-883
0-O22
9'3
1 8
955-855
March 28
845
20
955-795
846
847
9
22
955^39
955-827
846-8
955-814
O-Olg
849
20
9 ?5'795
39
13
955-772
4'
'9
955-8i9
42
43
21
15
955-776
955-821
1 1 42-4
955799
O'02I
4 6
'9
955-783
GREENWICH OBSERVATIONS, 1902.
2 r
310 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Difference of Sidereal Standard and Normal Clock at Paris by Signals sent from
Paris and Greenwich continued.
Date.
Greenwich
Sidereal
Time.
Number
of
Signals.
Difference of Clocks by
signals sent from
Mean of each Exchange.
Time of
Transmission.
Greenwich
Difference
Paris.
Greenwich.
Sidereal Time.
of Clocks.
1
1902.
h m
Ill S
III S
li m
m s
s
April 6
1054
H
955-264
10 56
10 58
'4
'4
9 55'274
955-289
10 56-2
955-271
o-oio
1059
22
955-258
April 7
10 2
'5
955-129
10 4
10 6
21
21
9 55-181
9 55-i86
10 5-0
9 55-'6i
0-023
10 8
15
9 55''47
April 8
938
12
9 55-042
94
94'
18
'7
9 55-069
955-069
940-3
955-059
O'OIO
943
1 1
955-056
12 20
13
955-027
12 22
12 23
12
12
9 55-0+5
9 55-051
12 12-6
9 55-038
o-oio
12 2,
l6
9 55- 3
April 9
953
'5
9 54'9 6 7
95 1
95 6
J 4
20
9 55-o j 7
9 55-033
9549
9 54-990
0-041
957
12
9 54'927
April 10
9 28
16
955-026
9 3
931
'7
18
955-103
955-094
9 30-7
9 55-063
0-035
933
16
955-030
April 1 1
956
18
955-093
958
959
18
18
9 55-'H
9 55''3 2
957-6
955-113 0-015
10
1 1 9 55-102
April 1 2
936
16
955-084
937
938
16
16
955-121
955''37
9 37-7
955-107
0-023
94
7
9 55-084
April 1 3
10 30
'5
955-061
10 32
10 34
16
16
955-101
9 55-io6
1033-0
9 55-086
0'02O
10 36
20 955-073
EXCHANGES OF SIGNALS.
311
Difference of Sidereal Stan lard and Normal Clock at Paris by Signals sent from
Paris and Greenwich continued.
Difference of Clocks by
Mean of each Exchange.
Date.
Greenwich
Sidereal
Time.
Number
of
Signals.
signals sent from
Time of
Transmission.
Greenwich
Difference
Paris.
Greenwich.
Sidereal Time.
of Clocks.
1902.
h in
Ill S
Ill S
h m
m s
s
April 1 3
13 o
16
955-064
13 2
13 3
'5
4
955-i 5
955-109
13 2'6
955-089
0-019
'3 5
17
955-076
April 14
956
17
955-034
959
10
20
20
955'075
9 55'79
10 58-8
9 55-059
0-019
10 I
'9
9 55'45
April 1 5
1034.
'9
955-064
10 36
1037
20
20
955'"5
955-132
1036-5
955-097
0-027
10 38
22
955'75
April 1 6
1145
24
955-018
1 1 46
II 48
22
22
9 55-070
955'75
ii 47-0
955-047
0-026
1 1 50
9
955-024
April 1 7
i37
22
9 54-9 8 5
10 38
1039
21
21
9 55-020
955-017
1038-8
955-001
0-017
1041
23
954-983
1232
2O
954-981
12 34
1235
'9
'9
955-014
9 55-006
12 34-2
954-991
0-019
12 36
23
9 54"9 6 3
April 1 8
10
H
9 54-877
10 2
10 3
18
18
954-901
954-898
10 2-3
9 54-887
0-013
10 4
15
954-873
12 42
1 1
954-871
1243
1244
20
2O
9 54-908
9 54-9 9
1245-2
954-887
O'O22
12 49
24
9 54-862
April 19
1 1 1 1
21
9 54-789
II 13
III4
21
21
954-813
954"823
H 137
9 54-802
O-OIS
1 1 l6
23
9 54-786
312 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Difference of Sidereal Standard and Noi~mal Clock at Paris by Signals sent from
Paris and Greenwich continued.
Date.
Greenwich
Sidereal
Time.
Numbe
of
Signals
Difference
signals .
Paris.
at Clocks by
ent from
Greenwich.
Mean of each Exchange.
Time of
Transmission.
Greenwich
Sidereal Time.
Difference
of Clocks.
h m
m s
m s
li in
m s
s
April 20
10 58
18
9 54- 68 4
1059
I I O
18
18
9 547 '9
954715
1059-9
9 547
O'OlS
I I 2
22
9 54-680
April 21
10 24
17
9 54^39
IO25
10 26
'9
18
954-575
9 54 ; 576
10257
9 54-559
0-016
10 28
'9
9 54-546
April 22
10 49
12
9 54'489
1
10 5 1
i53
'9
'9
954-516
954'5 2 4
10 51-8
9 54'5 2
0-018
1054
ij
9 54-478
April 2 3
10 53
'9
9 54-439
H 6
20
9 54'4 2ti
" 37
9 54^57
0-023
ii 8
22
9 54-480
'3 49
2O
9 54-429
'3 5
13 51
'7
17
9 54-462
954-475
'3 5"7
9 54-448
0'02I
13 52
20
9 54'4 2 5
April 24
IO 22
'9
954-335
10 23
10 24
21
21
954-373
954-37I
10 23-6
9 54-353
O-Olg
10 25
H
9 54'334
'345
21
954-3I8
'346
'347
21
21
954-369
9 54-364
1346-7
9 54'342
0-O25
13 50
23
954-316
April 2 T
I 22
'4
955^44
I 2 4
1 25
'5
'4
9 55'3'7
955 3 2 5
1,24-6
955-287
0-034
i 27
16
955-261
April 2 h
i 42
20
955-323
43
1 45
2O
'5
9 55-246
955-320
1 1 46-6
9 55-282
0-040
1 5'
13
955-236
EXCHANGES OF SIGNALS.
313
Difference of Sidereal Standard and Normal Clock at Paris by Signals sent from
Paris and Greenwich continued.
Difference of Clocks by
Mean of each Exchange.
Greenwich
Number
signals Sfint, from
Time of
Date.
Sidereal
Time.
of
Signals.
Paris.
Greenwich.
Greenwich
Sidereal Time.
Difference
of Clocks.
Transmission.
1902.
h m
Ill s
in s
Ii in
m s
s
April 28
1338
2 I
955-180
13 39
22
9 55'299
1 3 40-0
9 55'252
0-05 I
13 4
22
9 5 5-306
13 42
2O
955-222
April 29
10 41
2O
9 55'257
10 42
i43
>7
17
955-264
9 55-269
10 42-8
955-269
O-OO2
1045
17
955-282
April 30
11 37
'3
955-055
i 39
19
955-096
ii 39-6
955-076
O'O22
i 40
9
955-097
i 41
19
9 55-052
May i
i 48
H
955-079
i 49 20
9 55-130
1 1 49-9
9 55'ioS
O-O27
i 50 20
955-I37
i 52
21
955-082
13 59
19
955-133
14 o
'9
955-124
14 1-9
955-112
0-017
14 2
24
9 55'9'
14 7
18
955-099
May 2
10 58
18
955-057
1059
1 1 i
18
18
955-096
I I 0-0
955-077
O-OI7
I 1 2
20 955' 6 3
May 3
13 55
22 9 55-032
13 5 6
2 I
955-070
13 56-5
955-050
o-o 1 8
'3 57
21
9 55-064
1358
24 955^31
1 1 16
20 955-035
ii 18
i I 18
15
16
9 55' 6 5
955-073
II 18-9
955-051
0-016
ii 23
2 1 9 55-030
Mean
0-021
Sept. 2 1
21 42
21 44
22 927-439
26
927-3*5
2143-8
927-414
O-029
21 47
20 9 27-447
314 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Difference of Sidereal Standard and Normal Clock at Paris by Signals sent from
Paris and Greenwich continued.
i
Difference of Clocks by
Mean of each Exchange.
Date.
Greenwich
Sidereal
Time.
Number
of
Signals.
signals sent from
Time of
Transmission.
Greenwich
Difference
Paris.
Greenwich.
Sidereal Time.
of Clocks.
1902.
h in
in s
m s
h m
m s
s
Sept. 22
2 I 29
22
927'379
2131
21 32
'9
18
927-438
927-437
21 3I- 4
927-411
0-027
21 33
24
927-387
23 10
21
927-382
23 12
23 13
18
18
927-438
927-424
23 I2'2
927-406
0-025
23 '4
21
927-379
Sept. 2 3
234!
'4
927-416
23 42
2343
'7
J 7
927-458
927-461
23427
927-437
0-023
2 3 44
22
927-413
Sept. 24
20 27
24
927-334
20 29
20 30
20
21
927-382
927-382
2029-5
927-359
0-023
20 31
23
927-338
23 5
23
927-338
3 5
23 6
22
21
9 27-400
927-394
23 5 '9
927-363
0-034
23 7
24
927-320
Sept. 2 5
21 37
21
9 27-282
21 38
21 39
20
2O
927-346
9 2 7-333
2138-5
927-312
0-028
21 40
'9
927-287
Sept. 26
21 I
21
927-155
21 3
21 3
20
2O
927-239
927-237
21 3'8
9 27-204
0-034
21 5
24
927-163
21 9
7
927-195
2348
23
927-167
2349
23 50
Ifl
18
927-243
927-239
2349-3
9 27-206
0-035
23 5 1
10
927-177
Sept. 29
20 50
'7
9 22-922
20 JI
20 52
16
16
9 22-969
9 22-963
20 52-0
922-945
O'O2I
2054
22
922-925
EXCHANGES OP SIGNALS.
315
Difference of Sidereal Standard and Normal Clock at Paris by Signals sent from
Paris and Greenwich continued.
Difference of Clocks by
Mean of each Exchange.
Date.
Greenwich
Sidereal
Time.
Number
of
Signals.
signals s
Paris.
ent from
Greenwich.
Time of
Transmission.
Greenwich Difference
Sidereal Time. of Clocks.
1902. h m
in s in s
h ni
in s
s
Sept. 30 21 4-3
9
922-953
21 46
21 47
"4
'5
9 23-004
9 22-992
21 46-5
922-971
0-028
21 48
24
922-939
Oct. i
21
22
9 23-036
21 I
21 2
20
'9
923-107
9 23-1 12
21 1-3
9 23-076
0-034
21 3
23
923047
Oct. 2
21 3
2 1
923-178
21 5
21 6
21
2O
923-171
923-175
21 5 -6
9 2 3''7 8
0-005
21 8
24
923-190
Oct. 3
21 15
22
9 23-026
2] l6
2117
'7
18
9 23-063
9 23-060
21 17-0
9 23-040
O'O2I
21 19
2 I
9 23-011
Oct. 4
21 8
21
9 22-870
21 9
21 10
22
22
9 22-910
922-913
2149-6
9 22-891
O-O2I
21 I I
20
9 22-871
Oct. 5
21 45
21
9 22-768
21 47
21 48
23
22
9 22-807
9 22796
21 47-5
922-78^3
019
21 50
23
922-759
Oct. 6
22 55
'9
9 22-636
22 57 22
22 58 21
9 22-660
9 2 2 "661
22 57-2
922-645
O-O15
22 59 16
9 22-623
Oct. 7
22 28 20
9 22-636
22 30
22 31
22
23
922-675
9 22-693
22 30-8
9 22-663
O'02I
22 33
24
9 22-648
Oct. 8
2132
21
9 22-761
21 33
21 34
22
23
922795
922-795
21 33-6
922-775
0-020
21 35
22
922-748
316 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Difference of Sidereal Standard and Normal Clock at Paris by Signals sent from
Paris ami Greenwich continued.
Difference of Clocks by
Mean of each Exchange.
Givenwich
Number' signals sent from
T'imrt nt
Date.
Sidereal
Time.
of
Signals.
- ~o
Paris.
Greenwich.
Greenwich
Sidereal Time.
Difference
of Clocks.
Transmission.
1902.
li in
rn s
Ill S
li in
Ill s
s
Oct. 8
015
'9
9 22784
o 17
o 18
22
23
9 22-847
9 22-829
o 17-4
9 22-810
O-O27
o 19
22
9 22-783
Oct. 9
22 34
21
923-040
22 36
22 38
22
21
923 0-2
923-074
22 36-9
923-054
0-019
22 39
2 I
923-030
015
23
923-057
o 17
o 18
2O
'9
9 23-092
923-092
o 17-3
923-074
0-019
o 19
21
923-052
Oct. l o
21 JI 22
923-335
21 5 2
21 53
21
2O
923-374
923-378
21 52-6
923-356
0-02O
21 54
23
923'338
o 26
23
9 2 3'359
o 28
o 29
'9
18
923-414
9 2 3-4'5
o 28-1
923-386
0-O29
o 30
22
923-355
Oct. 1 1
20 48
21
923-594
20 49
20 JO
21
21
9 23-626
9 23-630
2049-9
9 23-610
0-OI7
20 52
21
923-591
Oct. 1 2
21 48
23
923-748
21 49
21 JO
2 3
23 9 2 3745
923-776
923-782
21 49-3
923-763
0-016
21 51
2 4
Oct. 13
22 24
21
923-766
.
22 25
22 26
2 I
20
923-807
923797
22 25-4
923-784
0-018
22 27
'5
923-765
Oct. 1 4
21 49
18
9 23-869
21 50
21 5 I
20
25
923 T 2 2150-5
923894
923-879
0-023
21)2
21
923'845
EXCHANGES OF SIGNALS.
317
Difference of Sidereal Stan/lard and Normal Clock at Paris by Signals sent from
Paris and Greenwich continued.
Date.
Greenwich
Sidereal
Time.
Numbei
of
Signals.
Difference of Clocks by
signals sent from
Mean of each Exchange.
Time of
Transmission.
Greenwich
Difference
Paris.
Greenwich.
Sidereal Time.
of Clocks.
1902.
h m
in s
m s
h m
m s
s
Oct. 14
o 29
22
9 23-847
o 30
031
23
23
923-901
923-898
030-7
923-873
0-027
33
21
923-846
Oct. 1 5
22 52
26
923-961
22 57
22 58
23
23
9 24-000
22 56-3
923-979
0-020
22 59
23
923-957
Oct. 1 6
23 II
'5
924-224
2 3 12
23 13
28
25
924-289
924-272
23 I3-9
924-253
0-028
2 3 I 5
20
9 24-228
23 19
16
924-223
I 18
20
924-239
I 1 9
I 22
20
20
9 24-292
9 24-282
I 20'6
9 24-264
0-O23
I 23
20
9 24-243
Oct. 17
22 7
22
9 24-429
22 8
22
Q 2J-*iU_8
22 10
23
9 24-464
22 9-0
924-441 0-015
22 I I
22
9 24-422
059
23
9 24-443
I O
2 2
I 2
22
924-418
9
i 1-7
924-436
o'ooS
' 5
22
9 24-437
Oct. 1 8
22 33
21
9 24-562
22 34
2235
22
22
9 24-608
9 24-629
22 34-6
924-589
0-030
22 36
2 I
924-555
Oct. 19
23 24
24
9 24-698
23 26
23 2 7
23
22
9 24748
9 24742
23 26'!
924723
O'O22
23 28
24
9 24704
Oct. 20
22 26
23
9 24-868
22 27
22 28
24
23
924-903
924-893
2227-3
9 24-881
0-018
22 29
24
9 24-858
Oct. 21
22 46
22
9 24-978
22 48
22 48
20
2O
925-042
925-037
22 48-0
925-003
0-037
22 50
20
9 24-954
GREENWICH OBSERVATIONS, 1902.
318 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Difference of Sidereal Slandard and Normal Clock at Paris by Signals sent from
Paris and Greenwich continued.
Difference of Clocks by
Mean of each Exchange.
Date.
Greenwich
Sidereal
Time.
Number
of
Signals.
signals s
ent from
Time of
Transmission.
Greenwich
Difference
Paris.
Greenwich.
Sidereal Time.
of Clocks.
1902.
h in
m s
m s
h m
in s
s
Oct. 2 1
I 1O
23
9 2 4'9 6 3
1 II
'9
925-007
I I 1-2
9 24-983
O'O20
I I I
'9
9 24-998
I 13
24
9 24-962
Oct. 22
22 3 I
21
9 25-026
22 32
22 33
23
22
9 25-1 12
9 25-100
22 33"O
925-072
0-035
22 36
23
9 25-048
I 2 9
23
925'053
I 30
I 31
17
17
925-095
925-132
I 307
925-083
0-031
i 33
26
925-051
Oct. 25
23 5
24
9 24-844
-
23 7
23 8
22
22
9 24-883
9 24-877
23 7'6
924-865
0-015
23 9
23
924-854
Oct. 26
o 7
7
9 24-889
o 8
21
924-923
o 8
21
924-911
o 9-7
924-897
0-020
IO
2 5
9 24-878
015
26
9 24-872
i 49
22
9 24-886
i 52
i 54
27
25
9 24-883
9 24-93
I 53H
9 24'97
O-023
1 59
23
9 24-930
Oct. 27
2333
25
924-991
23 34
2335
22
21
925-024
925-036
23 34-6
925-013
O-OI7
23 37
2 4
9 25-001
1 35
2O
924-991
37
138
20
21
925-042
925-045
1 37-4
9 25-021
O-O24
i 39
26
9 25-002
Oct. 28
22 51
21
925-117
22 52
22 53
18
'7
925-148
9 25-160
22 53-2
925-132
O-023
22 56
24
9 25-100
-
Oct. 29
22 59
23
925-207
23 o
23 1
23
23
925-235
925-238
23 0-9
925-219
O-O17
23 3
2 5
925-197
EXCHANGES OF SIGNALS.
319
Difference of Sidereal Standard and Normal Clock at Paris by Signals sent from
Paris and Greenwich continued.
Difference of Clocks by
Mean of each Exchange.
Date.
Greenwich
Sidereal
Time.
Number
of
Signals.
signals sent from
Time of
Transmission.
Greenwich
Difference
Paris.
Greenwich.
Sidereal Time.
of Clocks.
1902,
h in
in s m s
h m
Ill S
s
Oct. 29
I 25
26
925-190
I 27
I 28
27
26
9 25-228
925-233
I 27-4
925-212
O'O2O
I 29
26
925-193
Oct. 30
2 3 5
25
9 25^266
23 6
23 7
22
22
925-294
9 25-281
23 6-9
925-275
0-013
23 9
28
925-258
Oct. 3 1
23 50
2 5
925-289
23 51
23 5 2
20
21
925-349
925-341
235-9
925-317
0-028
2354
H
925-290
Nov. i
2349
2 4
925-355
23 50
23 51
22
21
925-395
925-391
23 50-9
925-377
0-017
^3 53
2 5
925-365
Nov. 2
23 36
25
9 25-408
2337
2338
21
22
925-464
925-473
2337-6
925-443
0-026
23 39
H
925-425
158
2 5
9 2 5-422
2
2 I
22
22
925-472
925-476
2 O'4
9 25-449
0-026
2 2
2 5
925-423
Nov. 3
O 20
22
925-485
21
O 22
23
24
925-527
925-528
O 21'6
925-503
0-025
023
23
925-47I
Nov. 4 ; 23 49
21
925-518
23 51
23 52
'9
9
925-554
925-556
23 51-4
925-538
0-017
23 53
25
925-521
, 5 6
24
925-520
1 57
1 59
3'
26
925-525
925-575
I 58-2
925-545
0-021
2 3
20
9 2 5'557
Mean
O-O23
320 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
XVIII. RESULTING VALUES FOR DIFFERENCE OF LONGITUDE.
The following Table shows the individual values of the difference of longitude
resulting from each night when the error of the clocks both at Paris and Greenwich was
determined from observation of stars. The first three columns require no explanation.
Oolumn 5 gives the difference of the clocks as found by the signals at the time given
in Column 1, which is found by taking the simple mean of the results given on pp.
308-319 in the cases when there were two exchanges on one night. Column 4 gives
the error of the clock at Paris at the same time, and is found by applying the rates
given on pp. 306-307 to the errors on pp. 299-305. Column 6 similarly gives the
error of the Sidereal Standard at the same time. From the figures in Columns 4, 5,
and 6 the value of the difference of longitude uncorrected for personal equation of
the observers is deduced and is given in Column 7.
The weights given in the last column were assigned according to the number of
groups of stars observed at either station. For most of the determinations given in the
Table the clock-errors at each station depend upon three or more groups of stars,
and to these a weight of 2 is assigned. If at either or both of the stations two groups
only were observed, a weight of 1 has been given to the result. A clock-error depend-
ing on -stars observed in only one position of the instrument is considered to be of
weight zero, and has not been used in deducing the longitude.
PART I.
The weighted mean of results of Series i. and iii. = 9 m . 21 8 '133
of Series ii. = 9 m . 2P'049
Therefore the difference of personal equation
between Mr Dyson and Mr Hollis - () 8> 0420
PART II.
The weighted mean of results of Series i. and iii. = 9 m . 20 s- 982
of Series ii. = 9 m . 21 S '067
Difference of personal equation between Mr
Dyson and Mr Hollis = 3 '0425
The value 8 '042 has been therefore adopted as the difference of personal equation,
and has been applied with the appropriate sign to the figures in Column 7 of the
preceding Table to obtain those in Column 2 of the Table on page 322, which gives the
determined difference of longitude between the observing piers. At Paris the pier was
O s< 094 east of Cassini's meridian, and the observing pier at Greenwich was 8- 020 west
of the meridian of the Transit Circle, therefore to form Column 3 8< 114 has been
subtracted from the figures in Column 2, which gives the difference of longitude
between the meridians of the two observatories.
KESULTING VALUES FOR DIFFERENCE OP LONGITUDE.
321
Date and Greenwich
Sidereal Time.
Observer at
Paris Clock
Slow.
Difference of
Clocks by
Signals.
Difference of
Greenwich Longitude
Clock Slow. unconnected for
Personal Equation.
1
March
d
19
h in
10 13
23 10 38
25 10 15
28 10 15
PART I. Series i.
H
8
47-004
m s
9 56-284
B
- IP894
m s
9 21-174
2
47-366
56-069
- I2-5I9
222
I
47-539
56-000
I2-707
168
2
47-567
55-806
- '*'97'
210
2
PART I. Series ii.
April
13 ii 48 H
I
) - 48-827
9 55-088
- 14-832
9 21-093
2
17 ii 36
- 49-435
54-996
- J5-5I9
080
2
18 ii 24
- 49-50
54-887
15-628
015
2
2O II O
23 12 2 7
-49-632
- 49-870
54-700
15-986
- '6-454
054
036
2
2
24 12 5
54-348
16-601
013
2
April
May
28 12 43
I 12 56
3 i* 38
D
PART I. Series iii.
H -
51-442
51-610
51-870
55-267
55-110
17-190
I7-593
17-910
9 2TOI5
093
091
September 21 21 44
22 22 22
24 21 48
26 22 27
H
PART II. Series i.
D
0-949
9 27-414
5-483
9 20-982
i
0-917
27-409
5-570
922
->
0-842
27-361
5-567
952
L
0-639
27-205
5-606
-960
i
PART II. Series ii.
October
8 22 55 I
) I
I 2-790
9 22-793
4-543
9 21-040
i
9 23 27
2-607
23-064
4-588
083
i
10 23 10
2-338
23-371
4-660
049
2
14 23 II
I- 9 50
23-876
4745
08 1
X
16 o 17
1-655
24-259
4-846
068
2
i7 23 35
I-5I8
24-438
4-893
063
2
21 O O
0-942
. 24-993
4-871
064
2
22 2
0-916
25-078
4'9 " 5
079
t
PART II. Series iii.
October 27 o 36
29 o 14
November 2 o 49
3 O 22
4 o 55
H
D
0-840
9 25-017
4-824
9 21-033
i
0-633
25^216
4-861
20-988
2
0-250
25-446
4-708
988
2
0-116
4-632
987
I
0-033
25-542
4"5 2 5
050
2
322 TELEGRAPHIC DETERMINATION OF LONGITUDE, PARIS-GREENWICH, MADE IN 1902.
Date.
Difference of Longitude
corrected for Personal
Equation.
March
April
April
May
'9
23
*5
28
18
20
23
*4
28
i
3
September 2 1
22
October
20
9
10
:t
17
21
Zl
October 27
29
November 2
3
4
Difference of Longitude
between Cassim's Meridian
and the Greenwich
Transit Circle.
PAKT I.
Weight.
ra !>
9 21-132
180
m s
9 21-018
066
126
OI2
168
054
9 21-135
122
9 21-021
008
057
096
078
20-943
982
964
'OSS
941
9 20- 973
9 20-859
21-051
'937
049
'935
Mean
discordance for weight 2
PABT II.
9 21-024
20-964
'994
2 I -OO2
9 20-910
850
880
888
9 20-998
9 20-884
21-041
007
927
893
039
O26
925
912
O2 1
O2 2
907
908
037
'9 2 3
9 21-075
030
030
9 20-961
916
916
029
092
915
97 8
Mean discordance for weight 2
Discordance from
Mean of Part.
8
Discordance from
Final Value,
s
+ O-O4I
+
0-086
+ 0-089
+
0-134
+ 0-035
+
0-080
+ 0-077
+
O-I22
+ 0044
+
0-089
+ 0-03I
+
0-076
- 0-034
+
O'OI 1
+ 0-005
+
0-050
O-OI3
+
0-032
0-036
+
0-009
o-i 18
0-073
0-040
+
0-005
0*042
+
0-003
+- 0-047 -4- 0-059
O'OOO
O-022
0-060
O"C82
0-030
O-O52
O-022
0-044
0-026
0-048
+ 0-017
O-OO5
0-017.
0039
+ 0-015
O-OO7
+ O'OO2
O*'O2O
0-003
O-025
0-002
0-024
+ 0-013
0-00 9
+ 0-05I
+
0-029
+ O-OO6
0-016
-f- O-OO6
0-016
+ 0-OO5
0-017
+ 0-068
+
0-046
O'Oig
0-028
RESULTING VALUES FOR DIFFERENCE OF LONGITUDE. 323
If the determinations in the spring and autumn are considered separately, the
weighted means taken and the discordances from these, as shown in Column 5, formed,
the results are as follows :
PART I. Difference of longitude = 9 m . 20 8> 977 8 '0110
PART II. = 9 m . 20 B '910 0"-0042
and the probable error of a determination of weight 2
PART I. ... 8 '039. PART II. ... 8 -016.
The smaller probable error in the second series entitles it to greater weight, but the
difference between the two determinations is so much larger than the probable errors
would indicate that the two results were not combined with the relative weights given
above. If the simple mean is taken, 9 m . 20 s- 943, and the discordances formed from it,
the probable error of a determination of weight 2 in the spring is found to be 0"'051,
in the autumn =fc0 8 '037. The autumn determination has therefore been given a double
weight as compared with that in the spring, and the resulting value for the Longitude
of Cassiui's meridian referred to that of the Greenwich Transit Circle is
20 st 932 E. 9 '0060.
TELEGRAPHIC DETERMINATION
OF THE
DIFFERENCES OF LONGITUDE
BETWEEN
GREENWICH, WATERVILLE, HAZEL HILL (CAM),
NOVA SCOTIA), AND MONTREAL
IN THE YEAH 1892.
I. INTRODUCTORY.
IN May 1890, the Astronomer Royal was invited by Prof. C. H. M c Leod of M c Gill
College Observatory, Montreal, to co-operate with him in determining the difference of
longitude between Montreal and Greenwich, by means of the telegraph cable and line of
the Commercial Cable Company. After submitting the matter to the Board of Visitors
and obtaining the sanction of the Treasury to the necessary expenditure, the
Astronomer Royal consented to take part in the work, on the understanding that
the cable stations at Hazel Hill, near Canso, in Nova Scotia, and Waterville, in Kerry,
should be used as stations for time-observations and for transmitting clock com-
parisons by signals, thus doing away with the necessity of making the connection
between the cable and land lines, and that the longitudes of these places should be
determined incidentally.
It was therefore arranged that four observers should take part in the work : Mr
Turnef, Chief Assistant, and Mr Hollis, Assistant, from Greenwich, under the direction
of the Astronomer Royal and Prof. M c Leod with another observer. After some
correspondence, the following scheme for the arrangement of observers was drawn up.
GREENWICH OBSERVATIONS, 1892. a
TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH WATKRVILLE
CANSO MONTREAL, MADE IN 1892.
TABLE I.
Greenwich.
f T?
Part 1.
Part 2.
Greenwich. Waterville. Canso. Montreal.
/ E D B C
\D E C B
/ B E C D
In this table the letters are those which distinguish the transit-instruments after-
wards referred to. Each observer always used the same transit-instrument, level and
chronograph, taking these with him from station to station. The Transits D and E
were assigned respectively to the Greenwich observers, Mr Turner and Mr Hollis.
Prof. M c Leod used the Transit B.
By reason of some misunderstanding, no clock-errors are forthcoming from the
observer who used Transit C, and consequently the observations under C in the
preceding table cannot be used for determination of longitude.
It was arranged that the first part should take place in the spring of 1892, and
the second in the autumn of the same year.
Mr Turner made a preliminary visit to Waterville in May 1891, to choose the site for
the Observatory and to have the pier built for the stand of the telescope. At the same
time the Ordnance Survey Officers, under the direction of Major Johnstone, R.E., set up
a meridian mark 1 mile 1350 yards to the south of the pier. Prof. M c Leod visited
Hazel Hill, Canso, at the same time for similar purposes, and experiments were then
made on the time of transmission of signals through the cable.
On 1892, April 10, Mr Turner left Greenwich for Waterville for the first stage of the
work, taking with him the clock and the transit-stand. These were set up and actual
work was begun on April 18. Mr Turner returned to Greenwich on April 29. Mr
Hollis left for Waterville on May 2, returning to Greenwich on May 20, which com-
pleted the first part.
On 1892, April 16, Prof. M c Leod reached Canso, and on April 17 and 18 ex-
periments were made in order to arrive at the most satisfactory method of exchanging
time-signals through the cable. On April 20 the siphon recorder was satisfactorily
adapted to the purpose in view, and complete sets of signals were sent and received
from both stations. Prof. M c Leod returned to Montreal on May 3, and observations
were begun again on May 4. On July 7 he came to Greenwich to discuss some points
connected with the work already done, and to make preliminary arrangements for the
second part.
INTRODUCTORY.
On 1892, August 16, the second part was begun ; Mr Turner arrived at Montreal
on August 17, Prof. MLeod being at Greenwich, and Mr Hollis at Waterville. The
observers continued at these stations until August 30, when Prof. M c Leod and Mr
Hollis exchanged places and Mr Turner went to Canso.
The following table shows the actual nights when observations were made at the
various stations :
Greenwich.
Number of
Exchanges.
Waterville.
Number of
Exchanges.
Canso.
1
Number of
Exchanges.
Montreal.
April 1 8
Half night
Cloudy
Cloudy
,, >9
Full night
2
Cloudy
o
Full night
20
Cloudy
I
Cloudy
Full night
\
21
Full night
2
Cloudy
Full night
,, "
Full night
2
Full night
Cloudy
,, 2 3
Half night
2
Full night
Cloudy
.. 2 4
Observations inte
rmitted
Full night
,, 2 5
Full night
2
Cloudy
2
Full night
*6
Full night
2
Full night
1
Full night
,, 2 7
Half night
I
2 8
Mr Turner left Waterville for Greenwich, arriving April 29. Professor M c Leod left Canso
for Montreal.
May 2
Mr Hollis left Greenwich for Waterville, arriving May 4.
4
o
O
Half night.
5
Full night
2
Full night
o
Cloudy.
6
Full night
2
Full night
I
2
Full night.
7
Cloudy
2
Full night
!
2
Cloudy. .
Observations inte
rmitted
I
., 9
Full night
2
Full night
2
Full night.
,, 1
FulL night
2
Cloudy
2
Full night.
,1 I'
Full night
i
Cloudy
2
Cloudy.
, I2
Full night
i
Cloudy
2
Full night.
,, '3
Cloudy
o
Full night
2
Full night.
'4
Cloudy
o
Cloudy
2
Full night.
'5
Cloudy
o
Full night
O
Cloudy.
16
Mr Hollis left Waterville. Half night.
Aug. 15
Half night
Cloudy
16
Half night
2
Full night
I
'7
Cloudy
I
Cloudy
Half night.
18
Full night
i
Full night
I
2
Full night.
,, ! 9
Cloudy
2
Half night
2
Cloudy.
20
Full night
2
Cloudy
2
Full night.
,. 2I
Full night
2
Cloudy
O
Cloudy.
,, 22
Full night
2
Half night
2
Full night.
,, 2 3
Half night
2
Cloudy
2
Half night.
,, 2 4
Cloudy
2
Half night
I
Cloudy.
>, 2 5
Half night
2
Full night
O
Cloudy.
26
Full nigh?
2
Cloudy
2
Half night.
,i 2 7
Observations inte
rmitted
,
2 8
Full night
2
Cloudy
2
Full night.
,. 2 9
Full night
2
Cloudy
2
Full night.
,, 3
Full night
2
Cloudy
2
Full night.
,, 3'
Mr Turner left Montreal for Canso. Mr Hollis left Waterville for Greenwich, arriving
Sept. 2.
TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH WATERVILLE
CANSO- MONTREAL, MADE IN 1892.
Greenwich.
Number of 1
Exchanges.!
Waterville.
Number of
Exchanges.
Canso.
Number of
Exchanges.
Montreal.
Sept. 2
ProfessorM c Leod
left Gr
eenwich for Wate
rville.
>, 3
o
Half night
,, 4
Half night
2
Cloudy
Full night
5
Full night
2
Cloudy
Cloudy
6
Half night
2
Half night
Cloudy
>, 7
Full night
2
Half night
Full night
,, 8
Full night
2
Cloudy
Full night
9
Cloudy
2
Cloudy
Full night
,, '
Cloudy
2
Cloudy
Half night
,, ii
Observations inte
rmitted
Half night
,, >2
Full night
o
Cloudy
o
Half night
,, '3
Full night
2
Full night
I
Full night
H
Full night
2
Half night
I
Full night
'5
Full night
2
Full night
I
Half night
'6
Half night
2
Full night
I
Half night
On April 24, May 8, August 27, and September 11, observations were intermitted
by arrangement in order to rest the observers and their assistants.
On May 13, 14, 15, and on September 12, the signals between Greenwich and
Waterville failed owing to faults in the telegraph connections.
II. OBSERVING STATIONS.
Greenwich. The observations at Greenwich were made in the Transit Pavilion
which is described on pp. 115, 116 of the section giving the account of the Paris-
Greenwich longitude determination 1892.
Waterville. At Waterville the pier for the transit-instrument was built in the
grounds on the east front of the station of the Commercial Cable Company, its centre
being 10 feet due south of the Ordnance Survey mark (see Plate VI.). The pier was
of brick surmounted by a slate slab and stood on a concrete foundation (4 ft. cube), the
foundation and pier both being carefully insulated from the floor of the observing hut.
The hut was the one used by the English observers at Greenwich in the deter-
minations of the Paris-Greenwich longitude 1888, and is described in the section
relating to that work. It is shown in plan and section in Plate I. The chronograph
was placed on a table in the position shown in that plan, but for purposes of signalling
it was carried into the telegraph office. There was no clock in the hut at Waterville,
OBSERVING STATIONS. 5
a chronometer being used for purposes of observation. The field of the transit-
instrument was lighted by small electric lamps fed by a primary battery placed in the
hut. In September the chronograph was permanently mounted in the Cable Office.
Canso. At Hazel Hill, Canso, a wooden observing hut was built in the grounds
of the Cable Station and supplied with electric light for illumination of the instru-
ment from the lighting circuit. The centre of the pier was at a point which is defined
by measuring 3 feet 4 inches along the N.E. wall of the new portion of the station
from its north-west corner and then measuring 1,5 feet 6 inches at right angles to
this wall as shown in the accompanying plan (Plate VII.). The chronograph was
in the Cable Station.
Montreal. At Montreal the transit-instrument was mounted in the Transit
House in the grounds of the M c Gill University, which lies between the Arts Building
and the Carlton Road, and about 200 feet due north of the Observatory. The
pier used in August was 3 feet to the east of that used in May (see accompanying
plan, Plate VII. ).
III. INSTRUMENTS.
The transit-instruments used were those designated B, C, D and E of the series of
five transits referred to in the account of the Paris-Greenwich longitude 1888, p. 6.
The modifications made in the instruments D and E, are described on p. 116 Paris-
Greenwich longitude 1892. Transits B and C, which were used by the Canadian
observers, were similarly modified except that in place of the buffer and spring, these
were fitted with an additional ring screwing into the object-glass cell to hold the lenses
firmly in their place. At Greenwich and Montreal the two stands with reversing
apparatus described on page 116 were mounted and remained at these stations through-
out the operations, the stand I being at Greenwich and II at Montreal. These stands
have segmental bearings. At Waterville and. Canso, the cast-iron stands with V-shaped
bearings used in the Parts-Greenwich longitude 1888 were used. The stand at
Waterville was dismounted at the end of May for use in the determination of the
Paris-Greenwich longitude and mounted again in August.
The diagonal Bolmenberger eye-pieces were used throughout with transits D and
E. A similar eye-piece was supplied for transit B and used in August and September.
The four striding levels described on pp. 116 and 117 were used throughout the
operations.
TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH WATERVILLE
CANSO MONTREAL, MADE IN 1892.
IV. INSTRUMENTAL CONSTANTS.
The explanation given in section IV. of the account of the Paris-Greenwich
longitude 1892 refers equally to this work. The observations made for determination
of the value of one revolution of the R. A. micrometer screws of transits D and E are
there given. The value l r "' = 3 S 756 = 56"34 was used for both these instruments.
The values of the Equatorial intervals of the vertical wires of transits D and E
are given in the account above referred to. The values of the intervals for transit B
were determined from transits of stars. The adopted values of the distances of each
wire from the centre deduced from 200 star transits, the declination of the stars
ranging from to + 80 are given in the following list, the wires being numbered
in the order in which a star transits when the instrument is in the position with the
micrometer head west :
I.
-14-08 VI.
+ 5-67
II.
ll'2l
VII.
+ 8-28
III.
~ 8'45
VIII.
+ 1 1-28
rv.
- 5'S7
IX.
+ 13-95
V.
O'OO
The values of one revolution of the micrometer screw of the levels d and e and the
values of one division of the scales are also given in the previous account. The value
of one revolution of the screw of level b, was determined on 1892, April 6 and April 8,
and from these determinations a mean value l rev ' =0"'885 was adopted. From deter-
minations made on the same dates, a mean value for one division of the level 6= 1"'40
was adopted.
V. CLOCKS.
The clock used at Greenwich was the Sidereal Standard operating on the chrono-
graph through a relay as described in previous sections. The clock used at Waterville
was Dent 2016, which is one of those formerly used in the Transit of Venus Expedition
(1874). This clock has a zinc and steel pendulum. An additional wheel with 31
teeth was inserted and contact springs fitted for registering on the chronograph.
The even seconds were thereby registered on the tape, and also the first second of
each minute in addition. This clock was set up in the Artificial Cable room on the
premises of the Telegraph Company, where the range of temperature is very small.
At Canso in April a break circuit-chronometer by Dent was used to make the
time record on the chronograph. In May, August and September a clock by
CLOCKS ; CHRONOGRAPHS ; ELECTRICAL CONNECTIONS FOR SIGNALLING. 7
Howard & Co. of Boston was used. Both chronometer and clock were placed in the
Artificial Cable room, the temperature of which did not vary more than 3 Fahrenheit,
during the progress of the work.
The clock used at Montreal was made by Ballou of Hartford, Conn., U.S.A.,
No. 102. It was placed throughout the work in a double-cased room in the base-
ment of the Observatory, where the temperature was fairly constant, the range during
the season being between 54 and 67 Fahrenheit. The greatest change between any
two days did not exceed 4 Fahrenheit.
In both the Howard and Ballou clocks the circuit was broken, at each second, by
a wheel on the seconds arbor, the 59th second being, however, omitted to distinguish
the minute. In the Dent chronometer all the seconds were recorded.
VI. CHRONOGRAPHS.
I
The chronographs used with Transits D and E were those made by Hilger, which
are described on p. 127 of the section relating to the Paris-Greenwich longitude 1892.
The coils of the chronographs were made to form part of a galvanic circuit, which was
completed either by the contact springs of the clock, by the tapping-piece, or by the
receiving relay of the telegraph apparatus, as will be described later.
The chronograph used with Transit B, made by Messrs Fauth of Washington, was
of the form in which a paper-covered cylinder is rotated by wheelwork actuated by
a weight and controlled by a double conical governor. The circumference of the
barrel is about 60 c.m. Both the clock and the observation signals were recorded
by the same pen on the chronograph by breaking a galvanic circuit.
VIL ELECTEICAL CONNECTIONS FOR SIGNALLING.
Greenwich was joined to Waterville by the Commercial Cable Company's line,
consisting of 355 miles of land line between Greenwich and Holyhead (partly under-
ground) ; 60 miles of cable between Holyhead and Howth, near Dublin, the cable being
joined directly to the land line at its ends, and a repeater being placed in the line at
Dublin ; and 270 miles of land line between Dublin and Waterville.
Waterville was joined to Canso by a cable (the northern cable of the Commercial
Cable Company) 2350 nautical miles in length.
Montreal and Canso were connected by a continuous land line (the Canadian
Pacific Railway Telegraph Company's line) 860 miles in length, which, on account of
the dry climate and its excellent condition, was worked without translating relays.
8 TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH WATERVILLE
CANSO MONTREAL, MADE IN 1892.
Greenwich and Waterville. In April and May an ordinary differential set of
duplex telegraph apparatus was set up at Greenwich, and connected with the
Commercial Cable Company's system at Waterville, for the comparison of clocks. At
Greenwich the receiving relay in the " bridge " of the duplex apparatus was connected
with the local circuit used for recording star-transits, so that a signal was recorded on
the chronograph when the relay was actuated. In order that the outgoing signal
should actuate the relay and thus register itself, the duplex balance of the line was
disturbed by a small amount. The incoming signal recorded itself in the usual way.
At Waterville the arrangement for registering the outgoing signal differed slightly.
Here, the instrument which transmitted the signal to the line, completed, by the same
action, the local circuit of which the chronograph coils formed part.
In August and September the signalling apparatus described on p. 127 of the
section relating to the Paris-Greenwich longitude, 1892, was used at both stations,
but owing to the length of the line it was found necessary to use a Morse double
current key. At Waterville, therefore, the main line was joined to the terminal r
(Plate V), and the terminal I joined to the Morse key used for the ordinary work of
the Cable Company, while at Greenwich the main line was joined to I and the Morse
key to r. The plugs were kept permanently in the holes marked " R," and the resistance
in the rheostat was adjusted so that the deflection shown by the galvanometer was
the same both in receiving and sending signals.
The observations of transits both at Greenwich and Waterville were recorded
directly on the chronographs without the intervention of the apparatus shown in
Plate V.
Waterville and Canso. The arrangements for finding the difference of the clocks
at Waterville and Canso by means of the transmission of signals through a cable, were
made by Messrs Wilmot and Dickenson, the Superintendents of the Commercial Cable
Company's Stations at the two places respectively.
The cable which was used for the purpose was that known as the "Northern," as
before mentioned, and was worked duplex with the siphon recorder. This duplex working
is accomplished by balancing an artificial cable (i.e., an apparatus in which all the electrical
conditions of the actual cable are, as nearly as possible, reproduced locally at each end)
against the real cable by means of a form of the Christie Bridge arrangement, it being
in this case a condenser bridge consisting of two blocks of condensers of 80 microfarads
each. The receiving instrument, the siphon recorder, is connected across the bridge
system between the cable and the artificial line, in the position usually occupied by the
ELECTRICAL CONNECTIONS FOR SIGNALLING. 9
galvanometer when measuring with the Christie Bridge, and has a further block of
condensers, called the " Receiving Condensers," connected in series with it for the
purpose of producing the necessary curbing effect on the incoming signal, the number
of microfarads in this being varied from time to time to suit working conditions.
The arrangement is very sensitive, and whilst with a perfectly adjusted duplex
balance no movement of the siphon is caused by the outgoing signals, a very small
defect or variation in the artificial line, or any of the apparatus used in perfecting the
adjustment of the balance, is sufficient to produce a disturbance of the balance and
cause movements of the siphon due to the outgoing signals. It was a disturbance of
this kind, produced at pleasure, that was used to give, for the purposes of the longitude,
the record of the " sent" signals illustrated in the diagram below. For the clock beats,
the contact springs of the clock were joined through a local battery and small condenser
to the signal coil of the siphon recorder, acting as a derived circuit on the same, and by
this means the line of ink dots left by the siphon was deflected sharply every two seconds
by the clock.
Sending Signals at Canso.
Receiving Signals at Canso.
Sending Signals at Waterville.
Receiving Signals at Waterville.
For the outgoing signals, beats were sent on the ordinary sending apparatus in
use on the cable, the balance being disturbed by altering an adjustable resistance
GREENWICH OBSERVATIONS, 1892. b
10 TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH WATERVILLE
CANSO MONTREAL, MADE IN 1892.
at the beginning of the artificial line by about 0'5 of an ohm. Each outgoing signal
was thus recorded on the tape of the sending station as well as on that at the receiving
end, the first break from the straight zero line on the tape being read in each case.
At Canso two siphons were used, one the cable siphon to receive the distant signals
and record the sent signals, the other to record the clock-signals. The local siphon was
moved by mechanical connection with an ordinary telegraph sounder, actuated by the
clock. The "sent" signals were recorded on both local and cable siphons, the record
on the cable siphon being obtained by disturbing the balance of the duplexed cable as
explained above. The double record of the sent signals afforded a means of deter-
mining the parallax of the siphons, but this was also measured from a number of
simultaneous marks made by the siphons when the carriage carrying the tape was
given a slight but sharp push sideways. The two measures gave results differing by
from "'02 to 3 '04, showing a retardation to this extent in the cable siphon record for
which an appropriate correction was applied to the readings.
The diagram (p. 9} gives specimens of the signals recorded at the two stations. In
all cases the first displacement of the siphon due to the incoming or outgoing current
was taken as the signal, and it will be seen that this point is always easily identified,
even if, as is the case in the last line of the diagram, the incoming signal coincided
partially with a clock-beat.
Canso and Montreal. The signalling apparatus before referred to (Plate V.) was
used at both these stations in the manner described on pp. 127, 128 Paris-Greenwich
longitude, 1892.
VIII. to XIV. inclusive refer to the observations made by the Greenwich
observers Mr Turner and Mr Hollis. Those made by Prof. M e Leod are given
separately as supplied by him.
VIII. METHODS OF OBSERVATION.
The general methods of observation were similar to those adopted in the deter-
mination of the Paris-Greenwich longitude in 1892. Section VII. on p. 128 of the
account of that work, applies equally to the observations made with Transits D and E
for this longitude determination. With Transit B, the observations of Polar Stars
were usually made over the wires with the micrometer set at the adopted reading.
ERROR OF COLLIMATION.
11
IX. ERROR OF COLLIMATION.
This error was determined by nadir observations and by observations of the same
circumpolar star in reversed positions of the instrument. At Waterville it was also
determined from observation of the mark (3110 yards distant). In the following tables
are given all the results obtained for collimation. In column 1 is the date and the
adopted reading for line of collimation at which the R.A. micrometer was left when not
in use for nadir or circumpolar observations. Columns 2 and 3 give the name of the
circumpolar star and the error of collimation of the middle wire deduced from observa-
tions of that star in reversed positions of the instrument. Column 4, the error of
collimation deduced from nadir observations. The next column gives the error found
from observation of the mark (at Waterville), and the adopted collimation error is given
in the last column.
If the adopted collimation error in the last column be denoted by c, and x denote
the diurnal aberration, viz : 0"'19 at Greenwich and Waterville, - 0"'22 at Canso and
Montreal, then the whole collimation error applicable to observations in the position of
instrument West is c + x, and in position East c + x.
Transit D. Waterville.
Date
and Adopted
Reading.
Star.
Deduced
Collimation
(P).
Nadir
Observation
(N).
Observation
of
Mark.
N P.
Adopted
Collimation
Error.
1892.
April 16
Bradley 1672... .
0-38
"
O'l I
0'28
April 17
Bradley 1672
O'77
April 1 8
+ o - o6
April 20
- 0-45
+ O'l I
0-06
0-19
^
i
IS TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH WATERVILLE-
CANSO MONTREAL, MADE IN 1892.
Transit D. Waterville continued.
Date
and Adopted
Reading.
Star.
Deduced
Collimation
(P).
Nadir
Observation
(N).
Observation
of
Mark.
N P.
Adopted
Collimation
Error.
1892.
Piazzi IX. 37
+ O'lQ
/;
"
n
//
o - z8
April 22
ii r> 83O
Bradley 3147 S.P
Polaris S P
- 0-23
+ 0-4.6
- 0-51
O'OO
+ o'o6
+ 0-14
O'26
0-40
April 23
n r '83O
Bradley 31478.?....
Polaris S P .
- I- 5 6
4- OM.7
+ 0-06
- 'SS
+ o'o6
+ 0-61
Aoril 2 c
O'jLC
u r -83o
April 26
ii r -830
Bradley 2993 S.P. ...
Bradley 3147 S.P. ...
Polaris SP
0'12
- 2-84
O'7O
- 1-18
O'OO
w T5
- 0-68
I'22
- 0-59
+ 0-63
Transit, D.
Greenwich.
1
May 5
n r '73O
2 Ursee Minoris S.P. .
Polaris S.P
0-63
I'll
+ 0'34
O'62
- '97
+ '34
+ 1-31
May 6
ir-yoo
Bradley 3147 S.P. ...
Bradley 1672
2-96
VOl
0-23
- 2-31
Polaris S.P
Z'CQ
( 2-08)
>7
- 2-86
- 0-23
+ 2-63
May 9
Bradley 1672 ..
I "AC
O'OO
O'QO
ii r '690
2 Ursse Minoris S.P. .
Polaris S.P.
1 T>
- 2-2 9
1-80
+ O'28
- i '93
- 0-51
+ i'4 2
On May 6, after the star observations, the telescope was thought to be not in focus, and an adjustment for focus
was made. The second nadir observation of this night was made after this and has therefore not been used.
On May 9, after the observations, the object-glass of Transit D was examined, and it was found that the lenses
were not quite tight in the cell. This was remedied before the observations on May 10.
ERROR OF COLLIMATION.
IS
Transit D. Greenwich continued.
Date
and Adopted
Reading.
1892.
May 10
ii r -66o
May ii
May 12
Star.
Bradley 1672
2 Ursse Minoris S.P.
Polaris S.P...
2 Ursse Minoris S.P.
Polaris S.P
Bradley 1672. .
2 Ursse Minoris S.P ,
Polaris S.P... .
Deduced
Collimation
(P).
0-68
IM I
1-38
1-06
0-87
0-09
0-48
+ 0-08
- 0-68
- '39
Nadir
Observation
(N).
+ 0-06
- 0-23
0-09
+ 0-17
0-17
O'OO
+ '39
+ 0-51
+ 0-4.5
Observation
of
Mark.
N P.
0-97
+ 0-48
+ 078
Adopted
Collimation
Error.
- 0- S 6
O-OO
O-OO
Transit D, Montreal.
Aug. 17
n r -66o
Aug. 1 8
ii r -66o
Aug. 20
ii r -66o
Aug. 22
i i r '66o
V Ursse Minoris
Groomb. 1119 S.P.
8 Ursse Minoris . .
Cephei 51 S.P. .
X Ursse Minoris.
- '-'5
- 3'9 8
0-30
0-15
o-oo
0-06
- Q-73
0-96
- 0-68
- '79
- 1-63
- 1-07
- ''35
- 0-51
0-84.
O'l 1
0-14.
- '49
+ 1-78
- 0-35
- 071
August 17, 1 8. It seems that a clamping bolt of the stand was missing on these nights. Observer's note Aug. 19 :
"Tried to adjust in Azimuth, but found the missing bolt imperatively necessary. Must assume nothing done
up to now."
14 TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH WATERVILLE-
CANSO MONTREAL, MADE IN 1892.
Transit D. Montreal continued.
Date
and Adopted
Reading.
1892.
Aug. 26
i i r -66o
Aug. 28
u r -66o
Aug. 29
n r- 66o
Aug. 30
1 1 '660
Star.
Cephei 51 S.P
A Ursse Minoris....
Groomb. 1119 S.P.
Deduced
Collimation
(P).
Bradley 2701
Groombridge 3548
8 Ursae Minoris..
2 '33
1-40
- 1-28
CT2O
0-88
Nadir
Observation
(N).
I '01
O'o6
0-62
- 0-51
1-18
Observation
of
Mark.
N P.
'94
+ 0-03
0-78
Adopted
Collimation
Error.
- 071
Transit D. Canso.
Sept. 3
n r -66o
Sept. 4
i i r- 66o
Sept. 6
i i r -66o
Sept. 7
u r '66o
Sept. 8
i i r- 66o
Sept. 9
n r -66o
A Ursa3 Minoris .
A Ursse Minoris .
Groomb. 1119 S.P.
Groomb. 1119 S.P. .
Groombridge 3548..
Cephei 51 S.P
Groomb. 1119 S.P....
+ 0-06
+ 0-14
79
- 079
+ o'6o
0-09
-\- 0-26
+ 0-05
+ o-o i
+ 0-03
o - o6
- '45
o - o6
0-28
- 0-17
- 0-68
- 0-68
- 0-68
- 0-68
- 0-68
Sept. 9. See last footnote on p. 24.
O'20
+ 0-62
- 071
0'2I
ERROR OF COLLIMATION.
15
Transit D. Cansu continued.
Date
aud Adopted
Reading.
Star.
Deduced
Collimation
(P).
Nadir
Observation
(N).
Observation
of
Mark.
N P.
Adopted
Collimation
Error.
1892.
Sept. 10
Cephei 51 S.P
0-18
"
O'2I
Sept. 1 1
S Ursae Minoris
- '39
+ O'l I
+ 0-50
Sept. 1 2
O'lQ
i j r- 66o
X Ursse Minoris
O'?4-
- 0'37
Sept. i?
-f- o'o6
+ O'?Q
4- O'3
Sept. 14.
Cephei 518?
-t- O'23
+ o'o6
ii r -66o
O'll
+ 0-23
0-03
0-26
Sept. 1 5
\ Ursse Minoris
O'4Q
O'2
Sept 1 6
Cephei 5 1 S.P. ..
I'll)
O'62
ii r -66o
0*62
- I-I 9
0-62
+ 0-57
Transit E
Greenwich.
April 1 8
Polaris S.P
0-83
+ '7Q
- 0-68
I2 r '42O
0-83
+ 0-79
+ 1-62
April 19
I2 r '42O
Bradley 3147 S.P. ...
Bradley 1672
- 0'S7
- 1-65
o - o6
o-c6
2 Ursae Minoris S.P. .
Polaris S.P
0-8 1
1-40
rn
- 0-31
+ o-So
April 2 1
I2 r '42O
2 Ursse Minoris S.P..
Polaris S.P
- 1-26
I'7O
- 0-51
o-c6
- 1-07
- I- 4 8 !
- 0-71
+ 077
16 TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH WATERVILLE
CANSO MONTREAL, MADE IN 1892.
Transit E. Greenwich continued.
Date
and Adopted
Reading.
Star.
Deduced
Collimation
(P).
Nadir
Observation
(N).
Observation
of
Mark.
N P.
Adopted
Collimation
Error.
1892.
April 22
I2 r '42O
Bradley 3147 S. P.. .
Bradley 1672
- i'53
2'OI
0-90
0*62
"
"
- 0-68
Polaris S.P
I ' I
- - o* c6
- 1-56
0-09
+ i '47
April 23
I2 r> 420
0-28
0-06
- 0-17
April 25
I2 r '42O
Bradley 3147 S.P. ...
Bradley 1672
- 1-13
O"7d.
- 0-23
O'J-C
2 Ursse Minoris S.P. .
Polaris S.P
~ I'35
2-66
u T3
0-84
- i'47
- 0-5I
+ 0-96
April 26
I2 r- 42O
Bradley 3147 S.P. ...
Bradley 1672....
- -53
O' 1.1
+ OM7
2 Ursae Minoris S.P..
Polaris S P. ...
- 2-31
I * I 2
u jy
- 0-23
- 1-03
- 0-15
+ 0-88
April 27
I2 r '42O
2 TJrsse Minoris S.P..
- 0-80
+ 0-06 .
+ 0-17
0-80
+ O'I2
+ 0-92
Transit E.
Waterville.
May 4
12 r '42O
May 5
I2 r '42O
Bradley 3147 S.P
Bradley 1672
2 Ursse Minoris S.P..
Polaris S.P. ...
- i-55
+ 0-04
1-09
0-56
- ''13
- 1-29
- ri8
- ''35
i - 6g
- 0-84
u VJ
- 0-88
- P20
- 0-32
ERROR OF COLLIMATION.
Transit E. Waterville- continued.
17
Date
and Adopted
Reading.
Star.
Deduced
Collimation
(P).
Nadir
Observation
(N).
Observation
of
Mark.
N-P.
Adopted
Collimation
Error.
1892.
May 6
I 2 r *4-2O
Bradley 3147 S.P
Bradley 1672.
0'22
O'17
- 1-18
O'7?
0*56
"
0-84
Polaris S.P
I'4
- 0-68
0-96
0-28
Mav 7
Bradley 1672
O'OQ
I"??
I2 r '42O
2 Ursee Minoris S.P. .
Polaris S.P
+ 0'2O
O - 7I
I'OI
0-20
- 1-18
0-98
May 9
I 2 r *12O
2 Ursse Minoris S.P. .
Polaris S.P
0-08
CrCA
- 73
I 'O7
0-56
- 0-31
0-90
- '59
.
May 1 1
Polaris S.P
-f- O'62
+ O'2?
+ 0-28
O'3Q
+ O'34
May 13
Groomb. 750 S.P
+ 0-77
0'84
- 1-61
May 14
I2 r '42O
May 15
I2 r '42O
Groomb. 750 S.P
+ 0-33
+ 0-23
+ 1-18
+ 0-90
+ O'l I
+ '33
+ o'7 '
+ 0-38
May 1 6
I2 r '42O
+ i-35
Aug. 15
i3 r- 45
Aug. 1 6
i3 r '45
X Ursee Minoris
Groombridge 3548 ...
- i-35
- i'5'
I -01
0-96
- 1-29
- 0-28
1-40
- i'43
1-09
+ 0'34
Aug. 17
i 3^450
- Q-45
GREENWICH OBSERVATIONS, 1892.
18 TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH WATERVILLE
CANSO MONTREAL, MADE IN 1892.
Transit E. Waterville /-ontinued.
Date
and Adopted
Reading.
Star.
Deduced
Collimation
(P).
Nadir
Observation
(N).
Observation
of
Mark.
N P.
Adopted
Collimation
Error.
1892.
Auf 1 8
Cephei 51 SP
1-81
I -07
"
P4.O
I3 r '4.CO
A. Ursae Minoris
0-4.7
1-24.
75 Draconis
(+ i - =;q)
I'OI
- 1-14
i-ii
+ 0-03
Auer IQ
Bradley 200,3..,
O'Q2
IM 3
'3 r '45
- 1-41
0-92
- 1-27
- o'35
Aug. 21
13^-450
Aug. 22
I3 r '45
- ,.58
1-69
1-80
1-64
Aug. 23
'3 r '45
2-03
- '-35
- 2-25
- 1-69
Aug. 24.
A. Ursss Minoris
I '4.2
- i-c8
I '4.1
1 3 T3 U
Aug. 25
i3 r -45
Bradley 1672 S.P. ...
- r 5 6
- 1-91
- 175
- I- 5 6
- 1-83
0-27
Aug. 28
I3 r '45
Aug. 29
'3 r '45
- 2-14
2-48
2-03
- 1-86
- 2-31
Aug. 30
'3 r -45
-' 1-86
The determination by 75 Draconis on Aug. 18 depends partly on a transit of 4 taps only at some distance from the
meridian. It has not been used in the adoption.
ERROR OP COLLIMATION.
19
Transit E. Greenwich.
Date
and Adopted
Reading.
Star.
Deduced
Collimation
(P).
Nadir
Observation
(N).
Observation
of
Mark.
N P.
Adopted
Collimation
Error.
1892.
Sept. 3
I3 r '45
Sept. 4.
Bradley 314.7 .
2-80
- 2-70
2'2
- 2'93
I3 r -j.i:o
Bradley 1672 S.P. ...
-86
* %*
2-48
- 3-38
- 2 '45
+ 0-93
Sept. 5
Bradley 2701
4- O 73
O'J.C
I3 r '5oo
Groombridge 3548 ...
Bradley 2093
- 2-38
o'o6
+ 0*39
X
- 0-57
0-06
+ 0-51
Sept. 6
Bradley 3 14.7 ..
1-18
-j- o'o6
I3 r -coo
2 Ursse Minoris
074
4- o-c6
ro6
+ 0-31
+ ''37
Sept. 7
I3 r -coo
Groombridge 3548 ...
Bradley 2993
- '-03
O'2A
+ 0-06
+ O* 3Q
Bradley 3 14.7 ..
I4.3
- O-gO
+ 0-23
+ 1-13
Sept. 8
Bradley 2701
I'13
+ OM I
Il r -COO
Bradley 200? ..
O'2 s
+ O'28
Bradley 3 1 47
'Q7
+ O'4.C
0-92
+ 0-28
+ 1-20
Sept. 12
i3 r '5o
Bradley 2701
Bradley 2993
+ 0-38
- 1-67
O'OO
0-56
0^65
0-28
+ 0'37
Sept. 13
Bradley 200? ..
I '23
O'4C
I3 r- 5oo
Bradley 3147
2 Ursac Minoris
O'63
I '4.C
o-oo
no
- 0-23
+ 0-87
TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH WATERVILLE
CANSO MONTREAL, MADE IN 1892.
Transit E. Greenwich continued.
Date
and Adopted
Reading.
Star.
Deduced
Collimation
(P).
Nadir
Observation
(N).
Observation
of
Mark.
N P.
Adopted
Collimation
Error.
1892.
Sept 14
Bradley 2701
O'34
+ O'l 1
'/
"
0-42
i3 r '5Oo
Groombridge 3548...
Bradley 3 14.7 ..
- 179
O.2O
- o'39
078
0-09
+ '6g
Sept. 15
I ?'''COO
Groombridge 3548...
Bradley 2093 . .
+ 0'2I
I '43
- 0-28
O'CI
Bradley 1672 S. P....
- 0-66
OM I
0-63
0-30
+ 0-30
Sept i 6
\ Ursse Minoris
O'4C
O'4f
I ? r 'COO
Bradley 2993 ..
o - ^6
O'l 1
0-41
- 0-28
+ 0-13
X. LEVEL ERROR
The Level Error was determined several times during each set of observations by
the striding level, and generally at the beginning and end of each evening by the nadir
observation. In the latter the pivots were assumed sensibly equal (see p. 126), and the
simple difference of the readings of the R.A. micrometer for coincidence of the middle
wire in reversed positions of the instrument was considered to be twice the error of
level. The difference between the level error as found from nadir observations and
with the striding level is shown in the following table ; column 2 is found by taking
the mean ( ir~) of the level errors determined by the striding level in positions West
and East, and subtracting this mean from the mean (N) of the errors determined by
nadir observation on the same evening.
In default of any explanation of these discordances it has seemed advisable to
adopt a weighted mean of the errors as found by the nadir observations and by the
striding level. To each nadir observation a weight of 2 has been assigned ; to each
ERROR OF LEVEL.
observation by striding level a weight of 1, and the mean with these weights has
generally been adopted as the level error for the whole of the evening.
Date.
W + E
Date.
*-!
f + E
2
z
Transit D.
Transit E.
Transit D.
Transit E.
Waterville
Greemoich
Montreal
Waterville
April 1 8
...
+ 075
Aug. 1 6
...
- 0-16
'9
...
+ 0-41
18
+ 0-72
+ 0-15
21
...
+ 0-42
'9
...
+ O'lO
22
0-58
+ 0-38
20
+ '39
23
- '55
+ '95
22
+ 0-18
0-23
25
0-38
23
- 0-66
26
0-82
+ 0-38
24
0-19
25
0-17
28
0-65
Greemvich
Waterville
2 9
''54
- '99
30
+ 0-14
May 5
- 0-25
- '33
6
. - 1-70
+ o-oi
7
+ 0-46
Canso
Greenwich
9
0-05
o-oo
10
+ 0-12
Sept. 4
- 0-51
+ 075
1 1
+ '94
+ 0-19
5
- 0-55
12
, + I "00
6
...
0^46
13
+ 0-19
7
0-61
+ 0-05
"5
- 0-43
8
- 0-23
+ 0-24
9
0^05
...
12
0-48
+ 0-23
'3
(+ 1-20)
0'12
'4
- '34
+ 0-05
'5
+ 0-27
+ 0-14
16
o-o i
TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH-
CANSO MONTREAL, MADE IN 1892.
-WATERVILLE
Transit D.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
W.
E.
\V.
E.
WatervUle.
GreemtrieJi.
1892.
li in
"
"
"
1892.
li in
"
"
"
if
Apr. 1 6
12 4
+ 3-18
+ 3'33
May 5
12 25
+ '34
12 28
+ 3'47
12 34
+ I- 33
13 o
+ 2-57
13 25
+ 2-41
Apr. 17
II 27
+ 6-12
+ 6-12
13 4
+ i'43
+ 178
14 o
+ 1-58
H 45
+ 2-76
Apr. 1 8
13 4
+ 5-89
+ 5-89
14 50
+ 1-66
15 12
+ 2-u
Apr. 22
9 3
+ 10-56
May 6
I I
- 2-03
10 10
+ 12-51
1 1 30
- 0-18
10 10
+ 10-29
+ 10-66
ii 35
+ 0-20
10 26
+ 10-07
ii 50
+ 0-03
10 45
+ 9-87
12 O
+ ! '54
+ 0-40
12 25
O'I2
10 50
+ 2-II
12 40
+ 2-03
II 48
+ 175
13 3
+ 275
12 30 ;+ 1*50
+ i'59
13 35
+ 0-64
14 o
+ 1-29
13 4
+ I -01
Apr. 23
IO OO
10 40
+ 3-6 3
+ 2-94
May 9
1 1 50
ii 55
12
1-96
2-26
i -oi
I I O
1 1 50
12 20
+ 3-92
+ 2-48
+ 2-91
12 15
12 40
12 4;
I -80
- 0-86
13 o
13 10
+ 275
+ 1-91
13 4
13 10
- 1-17
- 1-86
13 20
- 0-53
Apr. 25
IO O
10 10
+ 3-53
+ 3-82
+ 3-68
13 4
14 o
14 10
- 1-23
2-11
- 2-6 7
Apr. 2 6
IO
+ 4-61
May i o
1 1 40
- I' 9 l
10 26
+ 3-68
1 1 50
- i '47
10 33
4* 3 '46
12
2*04
ii 3
+ 2-35
12 15
1-20
" 33
+ 4'3^
+ 3 '42
12 35
0-40
- 0'93
ii 48
+ 3-48
13 o
0-62
12 58
+ 3-48
13 10 \
0-70
13 2O
+ 2-70
13 20
(- 1-80)
14 27
+ 3'34
13 35
0-46
13 4
+ 0-25
The level of the instrument was altered on April zo and again on April 22 d io h 46.
May 9. The two nadir determinations at end of evening have been given a weight of i eaoh.
May 10. The determination at i3 b zo m depends on a doubtful reading, and lias not been used in forming the Adopted Error.
ERROR OF LEVEL.
Transit D continued.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
W.
E.
W.
E.
Greenwich continued.
Montreal continued.
1892.
h 111
"
n
n
"
1892.
li in
"
><
"
"
May 1 1
12 20
- 172
Aug. 20
20
- 2-97
12 25
2-45
20 25
- 3-38
12 35
2-06
20 30
4-61
- 3 >6 7
12 45
2-33
20 55
2-89
13 o
- 1-63
- 178
21
3-92
13 10
- 3-17
13 25
2-16
13 45
- 1-13
Aug. 22
'7 45
- 372
14 o
- '59
i7 55
- 4'39
18 10
- 3'66
1 8 zo
- 3^5
May 1 2
12
- 2-45
18 25
- 4-24
- 4'<>9
12 I,
- 3-23
19 o
3-91
12 20
- 2-94
>9 5
- 4-85
I 2 35
2-86
19 40
- 4-I5
12 40
- 2-67
- 2-07
19 50
- 4^5
13 o
1-40
13 10
- 2-36
13 3
- 1-62
Aug. 23
18 20
- 4-21
13 3
- '39
18 25
- 3'97
1 8 40
- 472
4'z6
18 50
- 4"'7
Montreal.
18 55
- 377
Aug. 17
IO I I
- 5-04
Aug. 26
20 10
- 4'39
19 40
+ 8-14
20 45
- 5 '44
- 472
20
- 1-33
I '20
20 50
- 4-66
21
- 1-13
Aug. 1 8
18 30
1-62
Aug. 28
18 25
18 40
- 4'S 1
- 4' 6 7
1 8 40
- 274
18 50
- 4'7
18 45
2-40
'9 5
- 4-66
4-60
19 o
- 1-29
19 20
- 3-87
19 15
- 176
- 1-62
I 9 50
- 5-18
20 o
- 1-47
2O JO
- ''47
f
21
- i '07
Aug. 29
20 2O
- 3M-9
20 35
- 3-82
Aug. 20
'8 35
- 573
20 45
21
- 3-82
- 5'4
- 4-32
1 8 40
- 6-13
- 5'93
21 15
- 4-41
21 20
- 3-87
19 50
- 4-56
.
The level of the instrument was altered on August iy d iq h .
The instrument was moved in Azimuth August zo d 19!".
84 TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH WATERVILLE
CANSO MONTREAL, MADE IN 1892.
Transit D continued.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
W.
E.
W.
E.
Montreal continued.
Canso continued.
1892.
h m
"
"
"
"
1892.
h m
"
"
"
Aug. 30
18 5
* Q 1 1",
- 4'95
Sept. 8
14 o
- 2-85
I o I O
441
'9 45
2-08
18 6
+ 5-67
20 10
(~t~ 25)
~~ 3'5 2
18 10
+ 5*56
20 20
- 3'66
I 8 20
+ 6-04
2O 30
- 4'4 2
18 25
+ 6-31
2O 40
- 2-19
18 30
+ 6-15
21
- 3-15
1 8 40
+ 5'43
20
+ 6-19
20 5
+ 5-88
+ 6-26
Canso.
20 30
+ 6-87
21 10
+ 6-14
21 15
+ 7'3
Sept. 3
'9 3'
+ 6-43
21 40
+ 7'2I
19 40
+ 7'62
+ 7'
21 45
+ 57 2
19 45
+ 6-95
22
+ 6-87
Sept. 4
18 36
+ 4-86
Sept. 9
14 o
- 3'6o
19 12
+ 5'5 8
+ 5' 22
18 20
+ 4'4'
20
+ 4'39
18 25
H- 4'95
20 33
+ 4''9
+ 4'3 !
'9 5
+ 5'8i
20 44
+ 4'4^
19 10
+ 5 '47
19 50
+ 5'9
'9 55
+ 4'5
+ 5'9
Sept. 6
23 6
+ 0-17
+ 0-17
2O 22
+ 5' 2 6
20 25
(+8-22)
20 50
+ 5'20
Sept. 7
14 o
0-05
21 3
+ 5' 12
14 10
- 0-25
18 o
+ 4'
18 3
+ 4'9
Sept. 10
18 20
+ 3' 2 7
19 o
+ 3'9 2
18 30
+ 2 '47
19 5
+ 479
18 36
+ 3 -06
+ 3-40
19 50
+ 575
+ 5'21
18 49
+ 3-85
'9 55
+ 6-97
18 55
+ 4'34
20
+ 6-21
20 50
+ 573
20 55
+ 5 "49
Sept. 1 1
18 o
+ 3'89
21
+ 5'38
18 7
+ 2-86
+ 3 -I 4
18 18
+ 2-90
The determination of level by stridiug level on August 30* zo h io m has not been used.
On September 8<J, the mean of the two level determinations at i8 h 6m and i8 h 8 are taken with weight unity, also
the mean of the three at i8 h 30 with weight unity.
On September 4 d 19*" 45 m , the instrument was adjusted in azimuth.
The observation of the nadir on September 9" zo h 23 m was thought to be affected by an apparent doubling of the re-
flected image, which might have been caused by the dynamo running at the time : for the double appearance
did not exist when the dynamo stopped. This value has not been used.
ERROR OF LEVEL.
85
Transit D continued.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
W.
E.
W.
E.
Canso continued.
Canso continued.
1892.
h in
-
"
1892.
ii 111
"
"
"
"
Sept. 12
18 o
+ 4'9 6
Sept. 14
19 10
+ 2-60
18 5
18 54
+ 4-6 5
+ 5-58
+ 5'06
19 19
19 36
+ 2-80
+ 2-96
19 40
+ 3'45
19 49
+ 3-25
Sept. 13
1 8 40
+ 0-69
20 23
+ 373
'9 3
+ 2-66
20 37
19 30
+ 2-84
20 40
+ 4'5
'9 35
+ 3 '94
20 5
20 2S
+ 518
+ 4'94
+ 4-57
Sept. 15
18 36
+ 1-83
20 50
+ 676
18 49
+ 3->*
20 54
+ 670
'9 3
T 3^9
+ 4'i
21 2O
+ 5'38
'9 5
+ 5'io
21 25
+ 6-34
19 42
+ 5-47
21 30
+ 577
20
+ 473
Sept. 1 6
18 30
+ 9' 10
Sept. 14
16 35
+ o'3
1 8 36
+ 9''7
17 10
+ 1-67
19 o
+ io'H
+ 9'44
17 15
+ '34
19 10
+ 9'3 6
17 25
+ 1-27
A
19 15
+ 9'43
18 10
-+ 1-88
19 20
070
18 18
+ i'79
2125
+ 0-64
+ ''3
'9 3
+ 3'!'
21 30
+ 1-26
Transit E.
Greenwich.
Greeniirich continued.
I
April 1 8
13 20
+ 0-58
April 21
II
+ '59
13 40
+ 2-45
+ 2-07
12 O
+ '94
14 o
+ 2-81
12 5
+ 0-90
April 19
u 15
+ 3-I9
12 40
12 55
+ 0^69
+ '94
+ i -08
ii 20
4~ 3 ' 5
14 2
-f- i '07
ii 46
+ 4' IZ
H 3
+ 0-64
12 15
+ 3'4
+ 1 ' 1 1
14 40
+ 2-31
12 40
+ 1-56
3 33
13 o
+ 3'44
April 22
10 15
I'02
H 5
+ 374
10 30
0-60
I 4 15
+ 3'8o
II IO
+ i'53
1 1 30
+ 0-03
The level of the instrument was altered on September 16* ig h 15.
GREENWICH .OBSERVATIONS, 1892.
TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH WATERVILLE
CANSO MONTREAL, MADE IN 1892.
Transit E continued.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
W.
E.
W.
E.
Greenwich con ti nued .
Waterville continued.
1892.
h m
"
'
:
1892.
h m
"
*
"
"
April 22
12 10
+ I'I3
May 5
II 25
+ 3-98
12 40
+ 0-84
+ I'2I
" 55
+ 4'39
13 10
+ 2-28
12 IO
+ 4'n
+ 4'3
14 2O
+ 0-36
'3 5
+ 4^4
'4 3
+ I'75
'3 35
+ 4'85
April 23
10 40
+ 0-17
1 1 40
+ 0-40
May 6
I I 10
+ 4'3
1 1 40
1 1 40
+ 1-51
+ 0-71
+ 0-91
n 50
12 IO
+ 3'i6
+ 3-8o
+ 3'59
12 5
+ 2- 3 I
12 40
+ 377
12 -40
0-30
13 4
+ 3-27
April 25
10 40
ii 35
+ 2-91
+ 2-14
May 7
I I 10
II 3O
+ 6-08
ii 50
12 10
+ 2-23
-f- 2'62
J
12 40
+ 4-62
+ 4'88
12 40
13 7
+ ''99
+ 2-04
+ 2- 5 I
'3 45
13 5
+ 4-28
+ 4'H
13 4
+ 3'58
14 8
+ 2^2
f
May 9
10 40
+ 574
12 IO
+ 6-02
April 26
I I
+ IMS
12 40
+ 57'
+ 5' 8 4
1 1 50
+ 0-60
13 15
+ 5'8i
12 O
+ 0-68
14 50
+ 5'94
12 IO
+ i'4i
12 40
+ 1-64
i T
+ I-52
'3 7
+ 0-84
May 1 1
1 3 10
0-82
13 4
+ 2 '40
'4 5
- '"94
T r r
14 o
+ 270
15 40
- ''49
55
15 40
- ''99
April 27
12 IO
+ 1-24
3 45
'4 55
+ 1-36
+ 1-69
May 13
16 30
- 0-88
15 2
+ 2-14
'7 35
18 5
- 2-05
- 1-24
I 8 20
- 1-07
Watfi-rville.
May 15
15 3
- ri6
May 4
12 50
+ 4-05
+ 4'5
15 50
- 1-30
16 30
i -02
0-76
17 15
0-69
May 5
I I
+ 4')7
17 25
O'OO
The level of the instrument was altered between May 9 and ii.
ERROR OF LEVEL.
Transit K continued.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopter)
Level
Error.
W.
E.
W.
E.
Waierville contin ued .
Watervitte continued .
1892.
h m
"
-
"
1892.
h in
"
"
"
Aug. 15
16 o
- 1-92
Aug. 22
21 15
- 2-61
2-84
22 3O
- 2-39
22 35
- 2-93
Aug. 1 6
18 15
2'go
22 40
- 2-42
18 21
- 3-24
'9 5
- 3-09
19 10
- 3-51
Aug. 24
18 o
+ I- 95
19 20
- 3-30
18 15
+ 1-52
'9 35
- 3'33
18 30
+ i '43
19 50
2-70
19 ii
+ 0-8 1
-L i -]2
'9 55
- 2-84
- 3'37
19 20
+ 0-89
l i j t.
21 15
- 3'8o
19 40
+ 1-13
21 30
- 373
19 50
+ 0-93
21 40
3-18
21 40
+ 0-48
22 10
- 3'86
22 30
4-18
22 50
- 2-88
Aug. 25
18 10
- 0-37
23 10
- 3-69
18 30
+ 0-54
18 33
- 0-17
20 18
0-36
Aug. 1 8
18 o
+ '45
20 35
+ 0-59 i
18 10
+ 0-23
21 41
+ 0-63
18 15
0^42
22 7
- 0-23
O'26
18 36
O'I2
23 o
roi
18 35
+ 0-30
23 10
- 0-57
19 15
19 30
+ 0-82
+ OM2
+ 0-25
23 32
5
- '49
0-89
20 25
O'OO
10
- 0-23
21 50
+ 0-12
O 22
- 0-45
22 I 5
+ 0-69
22 25
+ 0-26
22 40
+ '37
Aug. 29
18 o
- 2-93
18 10
- 2-88
21 8
2'10
Aug. 19
13 20
+ I '24
21 41
- J'44
- 2-61
17 40
+ O'l I
21 47
- 1-50
18 10
- 1-23
23 45
- 2-19
18 15
- 075
0-31
O 2
- 374
18 55
+ 0-23
22 10
0-84
Greenwich.
22 3O
22 40
- '39
- 0-87
0-89
22 50
- 1-18
Sept. 3
20 40
0-84
Aug. 22
2O O
- 2-85
Sept. 4
20 30
+ 0-93
20 10
- 3-71
21 55
- 079
Aug. 18. The observations of Nadir at i8 h o m and i8 h io m have been given each weight unity only.
Transit E was moved in Azimuth on August 17 and 23.
TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH-
CANSO MONTREAL, MADE IN 1892.
-\VATERVILLE
Transit E continued.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
W.
E.
W.
E.
Greenwich continued.
Greenwich continued.
1892.
h lu
"
ft
"
1892.
h m
ft
"
"
Sept. 4
22 30
+ 0-13
Sept. 8
18 57
- 1-04
22 30
I '02
19 5
2 '43
23 40
+ 0-03
0-04
19 10
- 2-85
23 50
0-27
19 15
1-04
o 15
+ 0-03
20 2
0-16
20
0-46
20 39
+ 0-86
o 30
+ 0-03
2O 52
i -oi
2 I 22
- 0-88
22 9
+ 0-67
+ 0-32
Sept. 5
1 8 49
i-io
22 14
+ 0-92
18 55
i -45
22 34
+ 1-32
.'9 57
+ 74
23 15
+ 0-98
20 5
+ i'35
23 18
+ 177
20 24
+ 84 '
23 50
+ ''53
20 56
21 I 5
f '43
f 0-33
+ 0-57
o 5
o 15
+ 2-12
+ 2-31
21 43
+ 0-87
21 47
+ 0-89
22 32
+ ''7
Sept. i 2
19 15
2'I I
22 50
+ I'02
19 21
- 2-98
23 4
+ I-56
9 58
- 2- 54
2316
+ 1-52
20 24
2'IO
21 10
I'l I
21 48
J-gl
- i-Si
Sept. 6
22 15
22 30
- 1-63
22 28
22 34
- 2M3
2MO
22 50
+ 0'ic
23 16
2-22
22 55
+ 0-67
5
o 20
- 172
- ri8
23 15
+ 0-91
+ '47
10
+ 078
o 25
I
I 10
+ 0-68
+ 2-31
+ 2-03
Sept. 13
22
22 15
+ 0-03
O'l I
22 30
- 0-03
22 40
- OM5
Sept. 7
20 35
- 1-29
22 55
20 42
0'20
23 '5
+ 0-27
+ '34
21 I 5
~ 1-25
23 4
+ 99
21 26
- '54
2 3 50
+ 0-82
21 43
- '33
o 45
+ 075
22 15
22 31
- '99
- 0-35
0-65
55
i 5
+ 0-64
+ '59
22 51
1-33
23 20
0-42
23 40
0-21
Sept. 14
19 36
- 0-48
23 49
I'02
19 56
- 071
O 2
+ 0-06
20 I
- 1-26
i
Sept. 8. The determinations by Nadir at i8 b 57 and i9 h 15'" have each been given the weight i.
ERROR OF LEVEL.
Transit K continued.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
W.
E.
W.
E
Greenwich continued.
Greenwich continued .
1892.
h m
"
"
"
1892.
h m
//
"
"
Sept. 14
20 25
- 0-52
Sept. 15 22 15
- 1-05
0-80
20 28
+ o'43
22 30
0-72
20 55
21 43
+ 0-62
+ 0-62
+ 0-30
23 20
o 5
- 0'43
+ 0-15
22 27
+ 0-26
o 30
+ 0-08
22 50
+ 0'12
23 36
+ 1-23
+ i'7
Sept. 1 6
19 17
- 0-96
o 16
+ 1-32
19 23
- i-45
19 44
- '74
20 5
- 1-26
Sept. 15
'9 45
- 1-58
20 51
0-19
- 0-31
21 8
- ''59
21 23
+ 0-38
21 15
o'6o
22 5
4- '39
21 45
- 1-23
22 l6
+ 0-39
21 50
- i-'S
o 54
+ roi
XL AZIMUTH ERROR.
The deviation of the instrument was determined by observation of one or more
of the following Polar Stars. The first column contains the name of the star taken
from the Greenwich Catalogues. The second gives the Ephemeris, either the Connais-
Star's Name.
2
't-
0>
n
W
Approxi-
mate
N.P.D.
Mean R.A.
1892-0
given in
Ephemeris.
Adopted
Correction
10 R.A.
Star's Name.
Ephemeris.
Approxi-
mate
N.P.D.
Mean E.A.
1892-0
given in
Ephemeris.
Adopted
Correction
to R.A.
2 Ursaj Minoris . . .
Polaris
L.
C.T.
C.T.
C.T.
C.T.
L.
C.T.
C.T.
4 "9
i 16
4 44
2 47
i 3
8 12
i 42
ii 52
h m s
054 3-22
I 19 16-84
4 247-96
64947-3I
749 4'59
921 39'32
12 14 19-59
1547 5 5 '9
- 0-52
+ 0-82
0-26
- 1-30
+ 3-93
+ '39
+ 2-17
0*62
S Ursa; Minoris
A Ursae Minoris....
Bradley 2701
C.T.
C.T.
L.
C.T.
L.
C.T.
/
3 23
I 2
8 56
8 57
3 25
4 26
4 '9
3 7
h m a
18 7 9-20
19 31 24-00
2033 37^5
203459-91
21 zi 6-44
22 21 50-65
22 22 I5'92
232749-63
8
0*63
+ 0-30
+ 0'37
0-46
-j- 0-2O
- 0-3I
Groombridge 750..
Cephei 51
75 Draconis
Groombridge 1119.
Piazzi IX 37
Groombridge 3548.
Bradley 2993.
Bradley 1672
Bradley 2997
Ursae Minoris
Bradley 3 1 47
30 TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH WATERVILLE
CANSO MONTREAL, MADE IN 1892.
sance des Temps (C.T.) or M. Lcewy's Ephemeris (L.), in which the star appears. In
the next two columns are given the approximate N.P.D. and the mean R.A. for 1892'0
as given in the Ephemeris. The fifth column contains corrections to this mean R.A.,
deduced from the places given in the Greenwich Five Year Catalogue, 1890. In the
cases of 75 Draconis and Bradley 2997 the apparent R.A. for the day has been deduced
from the Greenwich Ten Year Catalogue, 1890, and the mean places given in columns
3 and 4 are computed from the last-mentioned Catalogue.
The observations of transits have been reduced to show clock error by the formula
R.A. = Observed Time + c sec. S + n tan 3 + m + Clock Slow, S being the declina-
tion of the star, c the whole collimation as defined on page 11, n the deviation of the
line of collimation from the meridian when the instrument is set at the altitude of the
pole, m the deviation when it is set on the equator.
The following table exhibits the computation of the quantity n. The second column
contains the name of one of the Polar Stars mentioned in the foregoing list, followed in
O O '
the next line by that of a star of large N.P.D. observed generally in the same position
of the instrument as the Polar Star and not long before or after. Column 3 gives the
position of the instrument in which they were observed. Column 4 shows the seconds
of difference between the R.A. for the day, with the above corrections applied and the
observed time on middle wire corrected by application of the quantity c sec 8. No
correction for difference of personal equation in observing Polar and Clock Stars (see
p. 45) but a correction for clock rate, found from a provisional reduction, has been applied
to the difference in the second line when the interval between the transits made this
appreciable. The next column shows the tangent of the declination of each star.
Subtracting the lower of each pair of lines from the upper in columns 4 and 5, the
quotient of the difference in column 4 by that in column 5 gives the value of n found
in column 6. The simple mean of all such values found on any night has generally
been adopted for reduction of the whole night's observations, and is 'given in the last
column.
AZIMUTH ERROR.
31
Transit D Values of n.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
Date.
Names of Stars.
1
Tabular
R.A.-
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
1892.
Apr. 22
Apr. 23
Apr. 26
Piazzi IX 37
Wate
E
W
w
W
w
w
E
E
E
E
W
W
W
w
w
w
E
W
E
E
E
E
W
W
W
w
w
w
E
W
W
W
rville.
S
+ lO'OO
+ 6-92
+ 10-44
+ 6-92
+ 1-53
+ 7-23
+ 1-14
+ 7' 20
- 2'53
+ 6-04
- 2-66
+ 6-32
+ 20-58
+ 6-33
-24-63
+ 6-40
20-17
+ 6-40
+ 6-16
+ S-Si
+ 0'35
+ 8-89
+ 3-30
+ 878
+ 1-03
-t- 8-90
-18-61
+ 8-86
14-06
+ 8-86
+ 12-16
+ 15-80
S
+ 6-94
0'22
+ 6-94
0-22
-13-23
+ 0-25
-12-89
+ 0-30
-I718
- 0-25
-17-38
+ 0-07
+ 3371
+ 0-16
-45-16
+ 0-16
-45-16
+ 0-16
12-89
+ 0'12
-I7-3
+ 0-14
-17-38
+ 0-07
-I3-23
+ 0-07
-45-I6
0-05
-45-16
0-05
12-89
+ O'12
s
+ 0-430
+ 0-492
+ 0-423
+ '459
+ 0-500
+ 0-515
+ 0-425
+ 0-685
+ 0-586
+ 0-204
+ 0-487
+ 0-3I4
+ 0-592
+ 0-609
+ 0-508
+ 0-280
s
+0-451
1892.
Apr. 26
May 5
May 6
Watei
Bradley 2993 S.P..
50 Leonis
ville-
E
E
E
E
W
W
w
w
w
w
E
E
Greet
W
W
E
E
E
E
W
W
W
E
E
E
W
W
E
E
W
W
-continu
8
+ I2-46
+ '5'95
+ 6-78
+ 15-88
+ 12-72
+ 15-77
+ 9' 28
+ 15-68
- 1-03
+ 15-86
- 3-55
+ '5'79
iwich.
+ 3873
+ 43 -2 4
+ 3871
+ 42-99
+ 24-90
+ 42-81
+ 29-10
+43-06
+ 37-58
+ 42-96
+ 36-08
+ 42-98
+ 56-33
+ 43-20
+ 59-53
+ 42-76
+ 37-58
+ 43-50
ed.
8
-12-89
+ 0-30
-I7-38
+ 0-14
-I7'38
+ 0-15
-I3-23
0-05
-45-16
0-09
-45-16
0-09
-13-22
+ 0-06
-13-22
0-09
-45-I3
0-18
-45 -I 3
o-oo
-17-38
+ 0-13
-17-38
+ 0-27
+33-73
+ 0-04
+ 3373
0-14
13-22
+ 0-81
s
+ 0-265
+0-519
+0-174
+0-486
+ 0-375
+ 0-429
+0-340
+0-326
+ 0-398
+ 0-309
+ 0-307
+ 0-391
+0-390
+ 0-495
+ 0-422
+ 0-361
+ 0-343
+ 0-435
v' 2 Hydr .
Piazzi IX. 37
Bradley 3147 S.P..
X Leonis
v 2 Hydra;
Bradley 2997 S.P.
34 Leonis
Bradley 31478.?..
10 Virginis
2 Ursse Min. S.P. .
48 Virginis
Polaris S.P
Bradley 2993 S.P.
Bradley 3147 S.P.
8 Crateris
& Virginis
Bradley 3147 S.P.
b Virginia. .
+0-542
+0-452
Polaris S.P ... .
w. Vir^inis
Bradley 1 672
2 Ursae Min. S.P...
37 Vir^inis
o Virginis
Polaris S.P
o Virginia
Polaris S P. ...
2 Ursee Min. S.P. .
Virginis.
o Virginia
Bradley 2993 S.P..
Polaris S.P
Bradley 3147 S.P..
X Leonis
5 8 Virginis
Polaris S.P
Virginis
Bradley 3147 S.P..
3 c Virsinis
Bradley 3147 S.P..
v Vir"inis
2 Ursse Min. S.P. .
Bradley 3147 S.P..
ft I/eonis
Bradley 1672
48 Virginis
Polaris S P
i o Virginis
48 Virginis
Bradley 2993 S.P..
43 Leonis
B.A.C. 4201
2 Ursse Min. S.P. .
a Canum Ven
TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH WATERVILLE
CANSO MONTREAL, MADE IN 1892.
Transit D Values of n continued.
Date.
Names of Stars.
Position.
Tabular
K.A.
Observec
Transit.
Factors.
n
Apparent.
n
Adopted.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
1892.
May 6
May 9
May 10
May n
Ore&r
Polaris S.P. . ..
mich-
W
w
E
W
W
W
w
w
w
E
E
E
E
W
W
E
E
W
W
W
w
E
E
E
E
W
W
E
E
contim
8
+ 20-48
+ 43-5
+ I874
+ 43 '9
+ 41-92
+ 43-92
+ 39'45
+ 44-10
+44-41
+ 43-93
+ 4i'95
+ 43-8o
+ 37-3I
+ 43-66
+ 44-36
+43-82
+ 36-08
+ 44-24
+ 35-62
+ 44-39
+46-41
+ 44-35
+45-44
+ 44'3
+ 44">3
+ 44' 2 5
+ 49-01
+44-30
+ 47-18
+ 44-44
ed.
s
-45-12
+ 0-81
-45-12
+ i-5'
+ 33-74
+ 0-16
+ 3374
0-29
I 3'22
O-O2
13-22
O-Og
-45-12
0-32
-45-12
+ '75
+ 3373
+ 0-16
+ 3373
0-16
13-22
0-02
-13-22
o'og
-45-12
0-32
-45-12
O'lO
-13-22
+ 0-81
s
+ 0-501
+ 0-540
0-o6o
-0-137
0-036
+ 0-141
+ 0-142
O'O12
-0-243
-0-25 9
0-156
0-087
+ 0-003
OMO5
-0-195
s
+ 0-006
0-141
1892.
May 1 1
May 12
Aug. 17
Aug. 1 8
Gr
2 UrsseMin. S.P...
4.8 Vir <T inis
eenwi
W
W
W
w
E
E
E
E
W
.w
E
E
W
W
W
W
E
W
J
w
w
w
w
E
E
W
W
W
w
h continue
m s
+ 48-72
+ 44-54
+ 53-58
+ 44-66
+ 53-04
+ 44'4 2
+ 26-89
+ 44-93
+ 27'27
+ 44-86
+ 4775
+ 44'59
+ 48-95
+ 4479
+ 55-76
+ 44-79
+ 53-59
+ 44-64
Montreal.
+ o. 38-09
+ i. 8-41
+ 2. 39+8
+ -i. 6-68
2. JO'I 2
+ I- 3^7
- 2-53-86
+ I- 3-20
+ 5- z'54
+ i- 3-i9
d.
8
-13-22
+ 0-05
-45-12
- 0-52
-45-12
+ 75
+ 3374
+ o-i i
+ 33-74
0-16
13-22
+ 0-81
13-22
0-09
-45-12
- 0-09
-45-12
+ '54
+ 6-363
O'O2O
-20-55
- 0-37
+ 55-79
+ 0-21
+ 5579
+ 0-31
-54-69
+ 0-31
-0-315
-0-199
0-187
-0-536
-0-519
0-225
-0-317
-0-244
0-196
-4750
-4-599
-4-203
-4' Z 73
-4-352
H
O-224
-0-3 4
-4750
-4-I98
a Canum Ven
Polaris S.P
e Ursse Majoris ....
Bradley 1672 ... .
Polaris S.P. .
6 1 Virginis
Polaris S.P ...
25 Canum Ven
Bradley 1672
o Virginia
Bradley 1672
8 Corvi
zUrsscMin. S.P...
y 1 Virginis
Bradley 1672
2 Ursas Min. S.P...
6 Virginis
2 Ursse Min. S.P...
a Canum Ven.
2 Ursse Min. S.P. .
Polaris S P.
6 1 Virginis
Polaris S.P
Polaris S P
2 5 Canum Ven
Bradley 1672
Virginis
Polaris S.P
o Virginis
Bradley 2701
Bradley 1672
q Virginis ... . |
2 Ureas Min. S.P. .
y 1 Virginis
2 Ursse Min. S.P...
Virginis.
Cephei 51 S.P
29 Sagittarii
Polaris S P .
i
A. Ursse Minoris
]) AquilsB
6 1 Virginis
Polaris SP
X Ursse Minoris ....
/J Safitts
l z Virginis
z Ursae Min. S.P...
a Canum Ven.
Groomb. 1 119 S.P.
B Sa"ittre
AZIMUTH ERROR.
33
Transit D Values of n continued.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
TnuiMt.
Factors.
n
Apparent
n
Adopted.
1892.
Aug. 1 8
Aug. 20
Aug. 22
Aug. 23
M
Groomb. 1119 S.P.
Aquilse
yntrei-
E
E
W
W
W
W
F
E
W
W
W
W
E
E
E
E
W
W
E
E
K
E
W
W
W
W
E
E
E
E
E
E
1 continuec
111 8
+ 4- 38-89
+ ' 4-15
+ 0.38-50
+ i. 3-28
+ o. 3878
+ i. 3-28
- o. 39-12
+ 0-47-25
+ i. 18-03
+ o. 52-69
+ o-3i75
+ o. 52-89
+ o- 55" Z 7
+ o. 52-56
+ o. 55-22
+ o. 52-92
+ I. 0-98
+ o. 46-66
+ o. 59-28
+ 0.46-82
+ o. 31-27
+ o. 46-38
+ o. 30-08
+ o. 46-70
+ i- 37-4*
+ .46-57
+ i. 33-I3
+ o. 46-69
+ o. 7-79
+ o. 46-44
+ o. 2978
+ 0.43-78
1.
8
-54-69
0'02
+ 6-363
+ 0-2I5
+ 6-352
+ 0-2I5
-20-55
- '37
+ 55-79
0-36
-54-69
+ 0-15
+ 6-363
+ 0-193
+ 6-352
+ 0-215
+ 16-91
+ 0-04
+ 16-91
0-05
-20-54
- 0-37
-20-54
+ 0-27
+ 55-81
+ 0'2I
+ 55-81
+ 0-31
-54-68
+ o-oi
-20-54
+ 0-27
8
-3-928
-4-031
-3'99 2
+ 4-280
s
+ 4-280
+ 0-413
+0-799
+ 0-673
1892.
Aug. 26
Aug. 28
Aug. 29
Aug. 30
M
75 Draconis
yntrec
W
W
W
W
E
E
E
E
W
W
W
W
E
W
E
E
W
W
E
E
W
E
W
W
E
E
E
E
W
W
il continuee
m 8
+ o. 35-90
+ 0.33-I5
+ o. 1 1-70
+ o. 26-10
+ o. 6-42
+ 0.25-93
+ I. 22-76
+ o. 26-82
+ 1.17-65
+ o. 26-39
o. 29-31
+ o. 26-00
- 0.23-29
+ 0.25-98
+ o. 28-06
+ o. 23-24
+ o. 28-52
+ 0.23-09
+ o. 39-21
+ 0.22-57
+ 0.38-85
+ 0.22-56
+ o. 37-79
+ o. 19-72
+ o. 35-26
+ o. 19-73
o. 23-82
+ 0. 20-01
+ o. 25-00
+ o. 19-32
1.
S
+ 6-353
0-270
-20-54
- 0-37
-20-54
0-40
+ 55-83
+ 0-53
+ 55-83
+ 0-31
-54-66
+ o-oi
-54-66
+ O'OI
+ 6-364
- 0-193
+ 6-364
+ 0-215
+ 16-82
- 0-33
+ 16-82
- 0-33
+ 16-91
+ 0-04
16-91
0-05
-54- 6 5
O-O2
+ 6-364
- 0-095
a
+ 0-415
+ 0714
+ 0-969
+ I-OI2
+ 0-923
+ I'OI2
+ 0-901
+ 0-735
+ 0-883
+ 0-970
+ 0-950
+ 1-071
+ 0-921
+0-802
+ 0-879
i
+ 0-4 1 5
+ o 922
+ 0-885
+0-918
fi 2 Capricorni
Bradley 2701
Cephei 51 S.P
20 Sagittarii
Cephei 5 1 S.P
i 5 Delphini ....
Cephei 51 S.P
\ Ursse Minoris
fii Cvsni
\ Ursaa Minoris
/Sagittarii
Groomb. 1 1 19 S.P.
a AquilsB
+ 0-451
4-0-385
+ 0-439
+ 0-375
+0-849
+ 0-735
+ 0-749
+ 0-799
+ 0-915
+ o-837
+ 0-707
+ 0-673
A. Ursae Minoris . . .
Q Sagittse
Groomb. 1119 S.P.
ft Aquilse
Bradley 2701
Groomb. u 19 S.P.
e Delphini
Bradley 2701
15 Delphini
8 Ursse Minoris
t Delphini
Bradley 2701
1 5 Delphini
S Ursse Minoris
; Serpentis
Cephei 51 S.P
Groombridge 35^48.
30 Capricorni ...
29 Sagittarii
Groombridge 3548.
30 Capricorni
8 Ursse Minoris
p l Ophiuchi
Cephei 51 S.P
c Aquilse
X Ursse Minoris ....
b Aquilae
\ Ursse Minoris
/3 Sagittae
8 Ursse Minoris
rj Serpentis
Groomb. 1119 S.P.
fj AquilcG ...
Groomb. 1119 S.P.
6 Aquilse
Cephei 51 S.P
t Aquilae
Bradley 2701
The instrument was moved in Azimuth after the observation on Aug. 17, on Aug. 19 and on Aug. zo d ig h . See footnote p. 13.
GREENWICH OBSERVATIONS, 1892.
34 TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH WATERVILLE-
CANSO MONTREAL, MADE IN 1892.
Transit D Values of n continued.
Date.
Names of Stars.
Position.
Tabular
R.A-
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
Date.
Names of Stars.
Position.
Tabular
R.A.-
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
1892.
Sept. 3
Sept. 4
Sept. 7
Sept. 8
X Ursse Minoris . . .
d Sagittarii . . . .
)
E
E
W
W
E
E
E
E
VV
W
Idjus
E
E
W
W
W
W
W
W
E
E
W
W
E
W
E
E
7ao.
m B
+ 2.57-66
+ o. 46-20
+ 2. 5975
+ - 47-I5
o. 1-32
+ 0.47-81
+ 3- 4'45
+ o. 49-04
+ 3- 7-I4
+ - 47'5 5
ted A zimuth.
+ 0. 8'12
+ 0.49-91
+ o- 55-30
+ o. 50-03
+ 0.36-57
+ o-SS-H
+ o. 9-90
+ o. 55-07
+ o. 5-83
+ o. 54-80
+ 1.11-15
+ o. 56-10
+ o. 39-09
+ o. 56-01
+ 1.43-94
+ o. 56-08
B
+ 55-84
- 0-35
+ 55-84
+ 0-09
-20-54
0-16
+ 55-84
+ 0'2I
+ 55^4
0-36
-54-63
0'02
+ 6-364
- 0-095
-20-54
+ 0-66
-54-62
+ 0-15
-54-62
0-02
+ l6'9I
O-O5
-20-54
0-16
+ 55-86
0-36
B
+ 2-340
+ 2-3 7 8
+ 2-4II
+ 2-434
+ 2^84
+ 0-765
+ 0-816
+0-876
+ 0-825
+ 0-897
+ 0-887
+ 0-830
+0-851
B
+ 2-359
+ z-443
+0-791
+0-866
1892.
Sept. 8
Sept. 9
Sept. 10
c
Groomb. 1119 S.P.
rj Aquilse
'anso-
E
E
W
W
E
E
W
W
E
E
E
E
W
W
W
W
W
W
E
E
E
E
E
E
W
W
W
W
continued.
m s
+ o. 15-06
+ o- 56-35
+ o. 9-04
+ o. 56-21
+ I. 9-92
+ o. 56-65
+ I. IO-22
+ 0.56-45
+ I. 12-90
+ o. 57-36
+ o. 3975
+ o. 58-08
+ o. 38-98
+ o. 57-81
+ 1.50-31
+ 0.5778
+ o. 7-12
+ o. 57-58
+ o. 8-85
+ 0- 57-53
+ 1. 10-94
+ o. 58-67
+ 0.43-15
+ o. 58-46
+ 0.43-02
+ o- 59'34
+ '-4475
+ o. 59-38
8
-54-62
+ O'OI
-54-62
- 0-23
+ 16-82
+ 0-17
+ 16-82
O'll
+ 16-91
0-05
-20-54
+ 0-66
- 20-54
+ 0-24
+ 55-86
+ 0-15
-54-61
+ O'OI
-54-61
0-23
+ 16-91
0-05
-20-54
- 0-37
-20-54
+ o-53
+ 55-87
+ o-53
B
+ 0756
+ 0-867
+ 0-797
+ 0-813
+ 0-916
+ 0-865
+ 0-906
+ 0-943
+0-924
+ 0-895
+ 0-723
+ 0759
+ 0-775
+ 0-820
B
+ 0-829
+ 0-908
+ 0-770
X Ursee Minoris ...
o" Aquilse . . .
Groomb. 1119 S.P.
a 2 Capricorn!
Cephei 5 1 S.P
2 Aquilse .
Groombridge 3548.
y Equulei
Groombridge 3548.
X Ursse Minoris
b Aquilee
S Ursse Minoris . . . .
i) Serpentis
X Ursse Minoris. . . .
/ Sagittarii
J
Groomb. 1119 S.P.
Aquilse
Cephei 51 S.P
fi 1 Lvrae ..
Cephei 51 S.P
Aquilse .....
Bradley 2701
X Ursse Minoris....
a Aquilse
Cephei 51 S.P
8 l Lyrae...
Groomb. 1119 S.P.
r) Aquilse
Groomb. 1119 S.P
a 1 Capricorni
Groomb. 1 1 19 S.P.
a Aquilse .
8 Ursse Minoris
rj Serpentis
Groomb. 1 1 19 S.P.
6 Aquilse
8 Ursse Minoris
rj Serpentis
Cephei 51 S.P
29 Sagittarii
Cepheisi S.P
ft 1 Cvsni
Cephei 51 S.P
2 Aquilae
X Ursae Minoris ....
fi 1 Cvcni..,
X Ursae Minoris.'. . .
/Sagittarii
AZIMUTH ERROR.
35
Trcmsit D Values of n continued.
Date.
Names of Stars.
Position.
Tabular
R.A.-
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent
n
Adopted.
1892.
Sept. II
Sept. 12
Sept. 1 3
c
8 Ursao Minoris
y 1 Ophiuchi
y awso-
W
W
E
E
E
E
E
E
E
E
E
E
W
E
W
W
W
W
E
E
E
E
W
W
E
E
continued.
Dl B
+ i. i3'5
+ i. 0-07
+ i. 13-87
+ I. O'OO
+ I. '6-57
+ i. 1-31
+ i. 16-95
+ i- 2-13
+ o. 39'99
+ I. 2'lS
+ i. S3'i2
+ i. 1-42
+ '.5 2 " 2 4
+ i. 1-76
+ 0.42-54
+ i. 2-90
+ i. 58-67
+ i. z'93
+ i-5 6 -54
+ I. 2-21
+ O.I7-I5
+ I. 2-40
+ I- 8'95
+ I. 2-64
+ I. 18-76
+ I. 2- 45
+ 16-91
+ 0-04
+ 16-91
0-05
+ 16-91
+ 0-04
+ 16-91
+ 0-64
-20-54
+ 0-64
+ 55-87
0-13
+ 55-87
+ 0-09
-20-54
+ 0-64
+ 55-87
+ 0-53
+ 55-87
- 0-13
-54-60
O'O2
+ 6-364
+ 0-193
+ l6'8o
- 0-33
s
+ 0797
+0-818
+ 0-905
+0-911
+ 1 -048
+0-924
+ 0-905
+ 0-961
+ 1 -007
+0-970
+ 0-829
+ 1-023
+0-952
B
+ 0-8o8
+ 0-939
+0-957
1892.
Sept. 14
Sept. 15
Sept. 1 6
C
S Ursse Minoris
rj Serpentis
'awso-
E
E
E
E
W
W
E
E
W
W
E
E
E
E
W
W
W
W
E
E
W
W
W
W
continued.
m s
+ I. 18-20
+ I. 3/32
+ 0.45-46
+ I. 4'OO
+ o. 44-22
+ I. 4-17
+ 1- 53-23
+ I- 3-53
+ o. 16-16
+ i. 3-69
+ - 44-55
+ i. 5'S 1
+ 2. 2-48
+ i. 5-14
+ 2. 0-46
+ I. 4-82
+ O.I5-45
+ I- 5-15
+ 0.40-27
+ I. 7'01
+ o. 42-92
+ I. 7-02
+ o. 18-76
+ I. 6-32
a
+ 16-91
0-05
-20-54
+ 0-66
-20-54
+ 0-64
+ 55-88
- 0-13
-54-60
+ O'l I
-20-54
+ 0-66
+ 55-88
+ 0'2I
+ 55-88
+ 0-09
-54-60
+ 0-33
-20-54
+ 0-66
-20-54
+ 0-64
-54-59
+ 0-33
S
+0-877
+0-875
+ 0-942
+0-887
+0-869
+0-989
+ 1-030
+0-997
+0-905
+ 1-261
+ 1-138
+ 0-866
+ 0-890
+ 0-980
+ I-2OO
+ 0-866
8 Ursse Minoris
rj Serpentis
Cephei 51 S.P
S Ursae Minoris
p 1 Ophiuchi
B 1 Lvrae ..
Cephei 51 S.P
v Lvrae
S Ursae Minoris
y Lvroe.
A. Ursae Minoris
K Aquilse . ...
Cephei 51 S.P
Groomb. 1 1 1 9 S. P.
B Aquilse
v Lvrae. . .
\ Ursae Minoris....
K Aquilse
Cephei 51 S.P
B 1 Lyrse
X Ursae Minoris. . . .
<j Aquilse
X Ursae Minoris . . .
b Aquilae
Cephei 51 S.P
X Urs;e Minoris....
o~ Aquilae
A. Ursae Minoris ....
B l Cveni
Groomb. n 19 S.P.
K Ursse Minoris ...
Aquilse
Cephei 51 S.P
B 1 Lyras
Groomb. 1119 S.P.
6 Aquilse...
Bradley 2701
Cephei 51 S.P
t Delphini
Groomb. 3548
30 Gapricorni
Groomb. 1 119 S.P.
8 Sagittas
Sept. :6 d i9 h i5 m . The level of the instrument was altered.
36 TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH WATERVILLE-
CANSO MONTREAL, MADE IN 1892.
Transit E Values of n.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
Date.
Names of Stars.
.
Position.
Tabular
R.A.-
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
1892.
Apr. 1 8
Apr. 1 9
Apr. 2 1
Apr. 22
j
Polaris S.P
6
E
W
W
W
W
W
E
E
E
E
W
W
W
W
E
E
E
E
W
E
E
E
W
W
W
W
E
E
E
E
'reenwich.
m a
+ o. 17-11
+ o- 39'9
+ o. 18-05
+ o- 39'9
+ o. 28-38
+ o. 39-80
+ o. 28-61
+ o. 39-89
+ i. 2'47
+ o- 39'94
+ o. 58-16
+ o. 40-01
+ o. 32-22
+ o- 40-95
+ 0.31-98
+ o. 39-74
+ o. 9-36
+ 0.39-68
+ o. 13-70
+ 0.40-24
4- 0.41-25
-f o. 40-62
+ o. 42-28
+ o. 40-83
+ 0-43-25
+ o. 40-82
+ o- 37-09
+ 0.40-56
+ o. 43-01
+ 0.41-22
a
-45''7
o-oo
-?
o-oo
-17-38
+ O'12
-J7-38
+ 0-04
+ 337'
+ 0-16
+ 337'
0-29
-13-23
+ 1-51
-i3'23
0-09
-45-17
- 0-08
-45 >J 7
4- 0-36
-13-23
+ 0-06
-13-23
0-09
-4-5-I7
0-19
-45-I7
O'OO
-17-38
+ 0-39
8
+ 0-50 5
+ 0-484
+ 0-6,3
+ 0-648
+ o 672
+0-534
+0-592
+0-591
+ 0-672
+0-583
-0-047
O'l 10
-0-054
+0-077
O'lOI
8
+ 0-495
+0-618
-0-034
1892.
Apr. 22
6m
Bradley 3 147 S.P. .
B Leonis
nwicl
W
W
W
W
E
E
E
E
W
W
E
E
E
E
E
E
W
W
W
W
W
E
E
E
E
W
W
W
W
E
E
i continued
m s
+ 0-44'99
+ 0.41-25
+ o. 34-76
+ 0.41-25
-j- o. 40-76
+ o. 40-87
+ o. 40-61
+ o. 40-96
+ 0.43-62
+ 0.41-09
+ o. 40-83
+ 0.41-16
+ 0.41-39
+ 0.41-17
+ o. 40-85
+ o. 35-07
+ o. 41-51
+ o. 36-13
+ 0.41-52
+ o. 50-38
+ 0.41-38
+ o. 50-66
+ 0.41-19
+ o. 36-47
+ o. 41-86
+ o. 37-66
+ 0.41-48
+ 0.28-74
+ 0.41-61
+ o. 1679
+ 0.41-34
8
-I7-38
+ 0-27
+ 3371
+ 0-16
+ 33-7I
0-16
-13-23
O-O2
-45-I6
0-08
-45-16
O'OO
+ '-39
+ 0-16
+ O'll
-I7-38
- 0-32
-17-38
+ 0-13
+ 3372
0-40
+ 3372
0-90
-13-23
+ i-5i
-I3-23
0-09
-45-16
+ 0-54
-45-16
0-19
E
O'2I2
-0-193
0-OO3
+ 0-O27
0-056
+ O-OO7
+ 0'I 10
+0-377
+ 0-308
+ 0-266
+0-275
+ 0-366
+ 0-291
+0-282
+0-546
8
0-076
+ 0'l 10
f o 339
Apr. 23
Apr. 25
Polaris S.P
Bradley 1672
o Virginis
Bradley 1672 ....
Virginis
Bradley 3147 S.P. .
q Virginis
2 Ursse Min. S.P...
yi Virginis
Bradley 31478.?..
R Virginis
Polaris S.P
Bradley 1672
65 Virginis
o Virginis
Polaris S P .. .
Bradley 1672.
Virginis '.
gsCorvi
y Ursse Majoris...
o Virginis
2 Ursse Min. S.P. .
e Ursse Majoris
2 Ursse Min. S.P...
1 1 Virginis
Bradley 3147 S.P.
Crateris
Polaris S P
6 5 Virginia
Bradley 31478.?.
v Virginis
Polaris S P . .
Arc turns
Bradley 1672
c Corvi
2 Ursae Min. S.P...
37 Virsinis
Bradley 1 67 z
/Virginis
2 Ursse Min. S.P...
Virginis .
2 Urs Min. S.P...
e Ursse Majoris ....
2 Ursse Min. S.P..
Virginis . . . .
Polaris S.P
Spica
Polaris S.P
Polaris S P
Bradley 3147 S.P.
S Leonis
R Com.ce
Polaris S.P
Spica .
AZIMUTH ERROR.
37
Transit K Values of n continued.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
1892.
Apr. 26
Apr. 27
May 5
Ore
Bradley 3 1 4.7 S.P..
enwic
E
W
w
W
w
w
E
E
E
E
W
W
W
W
E
E
E
W
W
vv
w
w
w
w
w
w
w
E
E
K
E
h coiitinuec
m s
+ o. 37-52
+ 0.41-36
+ o. 37-19
+ 0.41-36
4- o. 54-30
-\- o. 41-18
+ o. 50-64
+ o. 40-98
+ 0.32-85
+ 0.41-07
4- 0.3574
+ 0.41-24
+ o. 22-00
4- 0.41-51
4- o. 19-35
+ o. 41-66
4- o. 36-83
+ 0.41-58
+ o. 37-04
4- o. 42-04
+ o. 20-84
+ 0.41-58
+ o. 43-16
+ o. 41-22
iterville.
+ o. 40-13
4- o. 36-03
+ o. 38-50
4- o. 36-19
4- o. 34-59
4- o. 36-14
I.
a
-17-38
+ 0-16
-17-38
+ 0-16
4-3372
+ O'l I
+ 3372
0-09
-I3'*3
+ 0-07
-13-23
0-09
-45-16
0-19
-45-16
+ 0-75
-13-23
4- 0-25
-13-23
4- rig
-45-15
4- 0-25
+ 3-63
0-28
-I7-38
+ 0-06
-17-38
+ 0-27
4-3373
4- 0-04
1
+ 0-219
+ 0-238
+ 0-392
+ 0-287
+ 0-618
+ 0-418
4-0-434
+ 0-486
4-0-352
+ 0-347
+ 0-457
+0-496
-0-235
o-i 32
0-046
+ 0-387
+ 0-413
1892.
May 5
May 6
May 7
Wat
Bradley 1672
ervill
W
W
w
w
E
E
E
E
W
W
E
E
W
W
W
w
E
E
E
E
W
W
W
W
W
w
E
E
E
E
3 continued
m 8
+ 0.38-53
+ o. 36-28
+ 0.38-50
+ o. 36-24
+ o. 38-07
+ o. 36-20
+ o. 42-68
+ o. 36-12
+ 0.43-20
+ o. 36-33
+ o. 44-01
+ o. 3876
+ 0.42-56
+ 0.38-73
+ o. 28-09
+ o. 38-50
+ o. 25-96
+ o. 38-28
+ - 49-99
+ 0.38-57
+ 0.53-64
+ o. 38-69
+ o. 44-64
+ 0.41-60
+ o. 31-06
+ 0.41-39
+ o. 27-69
+ 0.41-44
+ 0.46-37
+ o. 41-28
g
+ 33-73
O-O2
-I3-22
+ 0-06
13-22
+ "54
-45-I3
0-18
-45'>3
o-io
-17-38
+ 0-06
-17-38
+ 0-27
+ 3373
+ O'l I
+ 3373
0-16
-45-12
+ 0-43
-45'i3
+ 0-75
-17-38
+ 0-04
+ 33-73
+ 0-11
+ 33'73
- 0-42
-13-22
0-05
8
+ O-067
O-I7O
0-I36
0-146
-0-153
0-3OI
O-2I7
O-31O
-0-364
0-25I
0-326
-0-175
-0-307
-0-403
0-386
a
0-II9
-0-295
0-308
y 1 Virginis
Bradley 31478.?..
Virginis
2 Ursse Min. S.P. .
37 Virginis
Bradley 1672
2 Ursse Min. S.P. .
R Comae
Bradley 1672
Polaris S.P
5 8 Virginia . .
2 Ursse Min. S.P. .
Polaris S.P ...
V Virginis
2 Ursa; Min. S.P...
6 Virginia
Bradley 3147 S.P.
83 Leonis
Polaris S P
Bradley 3147 S.P..
R Leonis
Polaris S P
25 Canum Ven. ...
2 Ursa Min. S.P...
/ Bootis
Bradley 1672
1 1 Virginis
Bradley 1672
2 Ursse Min. S.P...
i) Ursae Majoris
Polaris S.P
q Virginis
Polaris S.P
23 Comas
Polaris S.P
Bootis .
y3 Ursoe Minoris ...
a 2 Librae
25 Canum Ven
Bradley 3147 S.P..
8 Virginis
Bradley 3147 S.P..
83 Leonis
Bradley 1672
1 1 Virginis
Bradley 3147 S.P.
ft Leonis
Bradley 1672
ft Corvi
Bradley 1672 .. ..
I o Virg inis
2 Ursse Min. S.P...
88 TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH WATERVILLE
CANSO MONTREAL, MADE IN 1892.
Transit E Values of n continued.
Date.
Names of Stars.
Position.
Tabular
R.A.-
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
1892.
May 7
May 9
May 1 1
May 13
May 1 5
Wa
2 Ursse Min. S.P..
/3 Comse
tervil
W
W
W
W
E
E
W
W
E
E
E
E
W
W
W
E
E
E
W
W
E
E
W
W
W
W
E
E
le continue)
m a
+ a-44'5 1
+ 0.41-31
+ 0.55-90
+ 0.41-36
+ o. 5670
+ 0.41-52
*
+ o. 52-02
+ o. 46-07
+ 0.53-38
+ 0.46-43
+ I- 8-95
+ o. 46-78
+ i. 5' 88
+ 0.46-86
+ I- 7'2
+ o. 49-80
+ i. 8-75
4- 0. 49-80
+ o. 58-50
+ o. 53'5
+ 0.59-19
+ . 54-94
+ o. 58-07
+ i. 0-17
+ ' 4-23
+ I. O-2O
+ i. 4 - zi
+ i. o-n
i.
8
13-22
+ 0-54
-45"'3
+ o-54
-45-13
o-io
13-22
+ 1-51
-13-22
+ o'54
-45-12
- 0-08
-45-12
O'OO
-45-12
+ 1-19
-45-13
+ 1-19
12-09
+ 4-75
12-09
0-06
+ 4-75
+ 0-12
I2-O9
+ 0'08
I2-O9
0-06
8
-0-233
0-3I8
-0-337
O-404
-0-505
-0-492
O-422
-0-374
O-4O9
-0-297
-0-353
-0-454
-0'33'
-0-341
a
-0-456
-0-392
-0-325
0-360
1892.
Aug. 1 6
Aug. 1 8
Wa
Cephei 51 S.P
29 Sagittarii
tervil
E
E
E
E
W
W
W
W
W
W
E
E
W
W
E
W
W
W
E
E
E
E
W
W
W
W
W
W
E
E
le continue
m s
+ I. 2-17
+ 0.46-81
+ o. 3-85
+ 0.46-33
+ o. 4-21
+ o. 46-62
+ I. 27-09
+ o. 46-65
+ - 34-52
+ 0.47-07
+ o- 34'74
+ o. 46-86
+ o. 37-15
+ o. 46-99
0. O'OO
+ o. 273
+ o. 1-69
+ o. 2-96
-f o. 0-60
+ o. 2-71
+ o. 4-26
+ o. 2-96
+ o. 11-19
+ o. 3-10
+ b. 0-50
+ o. 3-01
+ o. 4-21
+ o. 3-34
+ o. 1-63
+ o. 2-73
i.
s
-20-55
- 0-37
+55-79
+ 0-53
+ 55-79
+ 0-15
-54-69
+ 0-15
+ 16-80
- 0-33
+ 16-80
+ 0-03
+ 12-89
o-oi
+ 16-91
o'i c
8
0-761
-0769
0-762
-0737
-0-733
-0'723
-0763
o- 1 60
+ 0-063
+ 0-104
+ 0-024
+ 0-145
+ o -046
+0-141
(-0-179)
a
-0-750
+ -073
Polaris S.P
A Ursae Minoris
fli Cveni
/3 Comse
Polaris S.P
X Ursse Minoris
a AnuilcG
V Virginia
2 Ursse Min. S.P...
c Ursae Majoris
2 Ursa; Min. S.P...
Groomb. 1119 S.P.
a Aquilse
Groombridge 3548.
30 Capricorni
Polaris S.P
Groombridge 3548.
d Aquarii
Polaris S P
Bradley 2993
77 Aquarii
Polaris S.P
8 Ursse Minoris
r] Ursae Majoris.....
Polaris S.P
Cephei 51 S.P
-20-55
- 0-37
-20-55
- 0-35
+ 5579
+ 0-53
+ 55-79
+ 0-18
-54-69
+ O'OI
+ 6-352
+ 0-193
+ 6-352
+ 0-215
r] Ursee Majoris
Groomb. 750 S.P...
Ursse Minoris
Groomb. 750 S.P..
8 Ophiuchi
Cephei 51 S.P
d Sagittarii
X Ursse Minoris
/3 1 Cytmi . . ,
X Ursse Mn oris. . . .
y Aquilse
Ursse Minoris
a Serpentis
Groomb. 1119 S.P.
n Aquila;
Groomb. 7508.?...
75 Draconis
Groomb. 750 S.P..
S Ophiuchi
e Delphini
75 Draconis ..
On May 15, the determination from Ursse Minoris has been used with weight = $.
The instrument was moved in Azimuth on Aug. 17.
Aug. 18, the observation of 75 Draconis (E) consisted of 4 bisections only ; it has not been used in forming the mean.
AZIMUTH ERROR.
39
Transit E Values of n continued.
Date.
Names of Stars.
Position.
Tabular
K.A.-
Observed
Transit.
Factors.
n n
Apparent. Adopted.
1
Date.
Names of Stars.
Position.
Tabular
R.A.-
Observed
Transit.
Factors.
n
Apparent
n
Adopted.
1892.
Aug. 18
Aug. 19
Aug. 22
Aug. 24
Aug. 25
Wt
Bradley 2007 .
itervi
E
E
W
W
W
W
W
W
E
E
W
W
E
W
W
W
W
W
E
E
E
E
E
E
E
E
W
W
'le continue
m s
+ o. 3-03
+ o. 3-16
+ o. 075
+ o- 5"33
+ o. 10-07
+ o. 5-38
+ 0. 0'02
+ o. 5-82
o. 0-80
+ o. 5-63
+ o- 5'37
+ O. I2'I I
+ o. 17-68
+ o. 15-31
-f- O. I2'I2
+ o- I5-54
+ o- zi'45
+ o. 15-68
+ o. 21-65
+ o. 15-46
+ 0.17-77
+ o- 1773
+ o. 17-26
+ o. 17-96
+ o. 17-71
+ o. 18-09
+ o. 16-47
+ o. 1 8-06
d.
8
+ 13-25
+ 0-18
+ 16-91
+ 0-80
-20-55
+ 0-80
+ 12-89
0-03
+ 12-89
+ 0'57
+ 6-352
+ 0-165
+ 16-91
- 0-15
-20-54
+ 0-27
+ 55-82
+ 0'53
+ 55-82
+ 0-18
+ 6-364
- 0-193
+ 16-82
+ 0-03
+ 12-89
+ 0-46
+ 12-89
+ 0-52
s
O'OIO
0-284
O'22O
-0-449
0-522
1-089
+ 0-139
+ 0-164
+ O-IO4
+ 0'I I I
+ 0-006
0-042
0-031
0-129
0-252
1892.
Aug. 25
Wi
Bradley 1672 S.P..
itervi
W
W
E
W
G-
W
W
W
W
w"
W
E
E
E
E
W
E
W
W
w
w
w
w
E
E
E
E
E
E
'le continue
m s
+ o. 20-99
+ o. 18-33
+ o. 20-30
+ o. 18-34
f eenwich.
+ o. 8-93
+ o. 13-94
+ o. 9-68
+ o. 13-94
+ o. 9-94
+ o. 14-01
+ o. 9-19
+ o. 14-17
+ o. 18-40
+ o. 14-04
+- o. 21-26
+ o. 14-04
+ o. 26-16
+ o. 14-71
- o. 3-03
+ o. 14-71
+ o. i 3-08
+ o. 14-98
+ O. I 2 "08
+ o. 14-51
+ o. 12-26
+ o. 14-51
+ o. 12-29
+ o- i4'5 z
d.
8
-33-67
+ '54
-33-67
+ '54
+ 16-79
+ 0-18
+ 12-90
+ 0-18
+ 17-41
- 0-18
+ i7'4'
+ 0-04
-33'65
+ 0-26
-33'6?
+ 0-26
-20-54
+ 0-31
+ 55-84
+ 0-31
4- 6-364
- 0-328
+ 6-364
+ 0-524
"I- 6-35'
+ 0-524
+ 16-79
- 0-33
. B
: 0-078
[
i
: -o-o57
0-302
-o-335
0-231
-0-287
0-129
-0-213
-0-549
-0-319
0-284
0-416
0-386
0-130 '
s
0-150
0-316
Pegasi
8 Ursae Minoris...
a Lyrse
Bradley 1672 S.P..
a Andromedse
Groombridge 3548.
t Pegasi
Cephei 51 S.P. ...
a Lyrae.
Bradlev 2003
-0-486
1-089
+ 0-130
-0-055
Sept. 4
Sept. 5
Bradley 2993
Bradley 2993.
t Peeasi
Bradley 3 1 47
ii 8 Aquarii
Pegasi
Bradley 3147
8 Ursae Minoris ....
i Aquilae
22 Piscium
Bradley 1672 S.P..
v Pegasi
Cephei 51 S.P
e Aquilae
Bradley 1672 S.P.
v Peaasi...
X Ursae Minoris . . .
8 l Cysni .
Cephei 5 1 S P .
A. Ursae Minoris . . .
y Aquilae
B Saeittse...
X Ursse Minons
3 Sagittse
Bradley 2701
Delphini
Groombridge 3548.
d Aquarii
Bradley 2701
3 2 Vulpeculae :
75 Draconis
Bradley 2993
i Pegasi
Bradley 2001 ..
Groombridge 3548.
30 Capricorni
p Pegasi
Observation of the mark on Aug. 23 showed that the instrument had moved in Azimuth as shown by the observation on
Aug. 22. In the afternoon of Aug. 23 it was adjusted in Azimuth.
40 TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH WATERVILLE
CANSO MONTREAL, MADE IN 1892.
Transit E- Values of r continued.
Date.
Names of Stars.
Position.
Tabular
R.A.-
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
Date.
Names of Stars.
Positiou.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
1892.
Sept. 5
Sept. 6
Sept. 7
On
Groombridge 3548.
f Caprice rni
enwic
W
w
W
w
E
E
E
E
E
E
W
W
W
W
w
w
E
W
E
E
W
W
W
W
E
E
E
E
W
W
h continue
m a
+ o. 7-89
+ o. 14^98
+ o. 1270
+ o. 14-88
+ 0. 12-09
+ o. 14-28
+ o. 8-82
+ o. 15-04
+ 0.^10-30
+ o. 14-91
+ o. 8-06
+ o. 15-31
+ o. 20-78
+ o. 15-26
+ o. 11-85
+ o. 15^24
+ o. 12-40
+ o. 15-24
+ - 9'94
+ o. 15-18
+ o. 8-57
+ o. 15-69
+ o. 11-57
+ o- iS-SS
+ o. 11-27
+ o. 15-24
+ o. 10-74
+ o. 15-07
+ o. 8-38
+ - >5'47
i.
a
-16-79
0-36
+ 12-90
0-30
+ 12-90
+ 0-57
+ 12-90
o-oi
+ 17-41
+ 0-42
+ 17-41
0-06
-33-65
O'lO
+ 13-23
0-03
+ 13-23
'3
+ 1679
- o"33
+ '679
- 0-35
+ 12-90
- 0-25
+ 12-90
O'OI
+ 17-41
+ 0-05
+ 17-41
+ 0-04
B
-0-4I3
O-l65
-0-I78
O-482
O-27I
-0- 4 I4
0-l65
O-256
O-2I4
0-3O6
-O^IS
O-3OI
O-3O8
-0-249
O^OS
s
0-300
-0-331
1892.
Sept. 8
Sept. 12
Sept. 13
Gn
Bradley 2701
tenwii
E
E
W
W
w
w
E
E
E
E
W
W
W
w
w
w
E
E
E
E
W
W
W
W
E
E
W
W
W
W
h continue
m B
+ o. 13-64
+ o. 15-58
+ o. 12-68
+ o. 15-88
+ o. 13-05
+ o. 15-84
+ o. 12-77
+ o. 15-73
+ o. 13-75
+ o. 15-51
+ o. 12-48
+ o. 15-89
+ I. 9-19
+ o. 17-27
+ o. 12-08
+ o. 17-40
+ o. 11-39
+ o. 16-85
+ o. 8 13
+ o. 17-06
+ o. 5-96
+ o. 17-23
+ o. 277
+ o. 17-25
+ o. 10-51
+ o. 17-19
+ o. 9-11
+ o- 17-54
+ o. 7-91
+ o. 17-43
i.
8
+ 6-364
+ 0-193
+ 6-364
+ 0-171
12-90
+ o-io
+ 1 2-90
o-oi
+ '7'4 !
+ 0-05
+ 17-41
O-I2
-54-60
+ 0-I5
+ 6-364
- 0-057
+ 6-364
0-2I5
-(-I2-90
0'03
+ 12-90
+ 0-05
+ I7-42
+ 0-04
+ 12-90
- 0-25
+ 12-90
O'OI
+ 17-42
+ O'OI
-0-314
-0-517
-0-218
0-230
O'lOI
-0-195
0-948
0-829
-0-888
0-691
-0-877
-0-833
0-508
-0-653
-0-547
0-263
0-844
e Delphini . .
Bradlev 2003 ..
Bradley 2701
8 Capricorn!
y Equulei
Bradley 2993
n Pesasi. . .
Bradley 2093
Pec'asi
Bradlev 200? ..
Bradley 2993
w Aouarii
Bradley 3 147
w Aouarii .
y Piscium
Bradley 3 '47
v Pecasi...
Bradlev 3 14.7 ..
30 Piscium
Groomb. 11 19 S.P.
a Anuilft:
Bradley 16728.?..
B. A. C. 17
2 Ursse Minoris....
20 Ceti
Bradley 2701.
69 Aquilae
Bradley 2701 . ..
2 Ursae Minoris
20 Ceti
Groombridge 3 5 48 .
30 Capricorni
Bradley 2993 ....
y Aquarii
Bradlpy 2993 .. ..
Groombridge 3548.
K Capricorni
y Piscium
Bradley 3147
22 Piscium
Bradley 2003...
Bradley 2993
j.c Aauarii ..
Bradley 2993
ij Aquarii
Bradley 3147
y Piscium
Bradley 2993
Bradley 3147
2 2 Piscium
Bradley 3147
AZIMUTH ERROR.
Transit E Values of n continued.
Date. Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
1
Factors.
n
Apparent.
n
Adopted.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
1892.
Sept. 13
Sept. 14.
Ore
Bradley 3147
enwic
E
E
E
E
E
E
W
E
W
W
W
W
E
E
E
E
E
E
W
W
W
W
W
W
E
E
h continue
m H
+ o. 8-40
+ o. 17-13
+ o. 26-96
+ o. 16-97
+ o. 13-18
+ o. 17-03
+ o. 11-35
-1- o. 17-03
+ o. 53-44
+ o. 17-83
-r o. 14-50
+ o. 1773
+ o. 14-43
+ o. 17-32
+ o. 13-48
+ o. 17-53
+ o. 11-32
+ o. '7*37
+ o. 8-34
+ o. 17*74
+ o. 12-38
+ o. 17-60
+ o. 10-59
+ o. I7*4 J
+ o. 10-07
+ o. 17-12
1.
|
+ 17-42
+ 0-09
-33-64
0-07
+ 13-23
+ 0"I2
+ I3-23
+ O'I2
-54-60
0'O2
+ 6-364
~ 0-057
+ 6-364
+ 0-215
+ 6-351
0-165
+ I6-80
- 0-31
+ 16-80
- 0'35
+ I2-90
- 0-25
+ 17+2
+ 0-16
+ 17-42
+ 0-05
s
-0-504
0-298
-0-294
-0-434
-0-653
-0-503
-0-470
0-622
-0-354
-0-554
-'397
-'395
0-406
-0-463
0-484
1892.
Sept. 15
Sept. 1 6
Grt
Groombridge 3548.
y Equulei
enwic
W
W
E
E
E
E
W
W
W
W
E
W
E
W
W
W
W
W
W
W
W
W
W
W
E
W
h continuec
m g
+ o. 9-20
+ o. 17-68
+ o. 7-79
+ o. 17-70
+ o. 12-36
+ - I7-55
+ o. 10-60
+ o. 17-94
+ o. 30-88
+ o. 17-89
+ o. 2979
+ o. 17-89
o. 18-24
+ o. 18-63
- o. 18-48
+ o. 18-63
+ o. 53-36
+ o. 18-09
+ o. 14-13
+ o. 18-27
+ o. 14-41
+ o. 17-95
+ o. 13-01
+ o. 17-90
+ o. 12-92
+ o. 17-90
1.
8
+ 16-80
+ 0-17
+ 16-80
0-36
+ 12-90
- 0-15
+ 12-90
O'OI
-33-63
O'l 1
-33-63
o-ii
+ 55-88
0-36
+ 55-88
0-36
-5+59
+ O-20
+ 6-364
O'27O
+ 6-364
0-165
+ 12-90
0-02
+ 12-90
O'O2
8
O'5IO
-0-578
-0-398
-0-569
0-388
-0*355
0-656
0-660
-0-644
0-624
-0-542
-0-379
0-386
8
0-466
-0-556
i Piscium
Bradley 16728.?..
13 Ceti
Groombridge 3548.
Capricorni
2 Ursoe Minoris ...
8 Piscium
Bradlev 2003
Aquarii
2 Ursae Minoris ...
8 Piscium
Bradlev 2005
rj Aquarii
Groomb. 1119 S.P.
6 Aquilae
Bradley 16728.?..
3 3 Piscium
Bradley 1672 S.P.
3 3 Piscium
Bradley 2701
69 Aquilse
A. Ursse Minoris
f Sagittarii
Bradley 2701
1 5 Delphini
75 Draconis
X Ursse JMinoris
/ Sagittarii
/n Aquarii ...
Groombridge 3548.
t Capricorn!
Groomb. 1 1 19 S.P.
a Aquilse
Groombridge 3548.
K Capricorni
Bradley 2701 . .
y3 2 Capricorni
Bradlev 2003
75 I)raconis
r 2 Aquarii
fjL Aquarii
Bradley 3 147
Bradlev 20,03 ..
58 Pegasi
a Aquarii
Bradlev 3 14.7 ..
Bradley 2993
a Aquarii
i
GREENWICH OBSERVATIONS, 1892.
4% TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH WATERVILLE
CANSO MONTREAL, MADE IN 1892.
Values of the Instrumental Constants Z, m, and n.
In the following tables the values of I (the level-error) converted into seconds of
time, the values of n and the deduced values of TO are collected.
The values of m are derived from the adopted values of I (the level-error) and n by
the formula,
m =(l n sin X) sec. X where X is the latitude.
The adopted values for X are :
Latitude of Greenwich, 51 28' 38".
,, Waterville, 51 50' o".
Canso, 45 17' o".
Montreal, 45 30' 17".
Transit D.
Date.
Sidereal Time.
l
n
m
Date.
Sidereal Time.
l
n
m
Waterville.
Montreal continued.
1892.
A pril 2 2
h m h m a
9 20 IO 21 + 071 1
1021 13201-)- o'io6
s i
+ o-45i
+ "54*
a
+0-58
-0-52
1892.
Aug. 20
h m h 111
18 2818 50
1930-2044
|
- 0'395
- ' 2 4S
8
+ 4-28O
+ OHI3
8
-4^2
-077
23
10 10 13 20 f O'I93
+ 0-452
0-26
22 17 4819 50
0-273
+ 0-799
1-20
26
10 12 14 4.0
+ 0-228
+ 0-361
0-09
23
18 1419 12
- 0-284
+ 0-673
I '09
Greenwich.
26
20 10 20 42
- 0-315
+ 0-4l6
-0-87
28
18 28 19 50 0-307
+ 0^22
-I'37
May 5
12 2015 IO
+ O-Iig
+ Q'343
0-24
2 9
20 I I 21 21
- 0-288
+ 0-885
-I-3I
6
9
1 1 25 1 3 20
II 52-1343
+ 0-027
- 0-I05
+ '435
-f- 0-006
0-50
-o-i 8
30
17 57-2054
- 0-235
+ O-giS
-1-27
10
1 1 20 i 3 32
- O-O63 ; 0-141
+ 0-08
Canso.
1 1
12 2013 43
0-119 0-224
+ 0-09
Sept. 3
1910194! + O'467
+ 2-359-I-72
12
12 31318
- 0-I38
- 0-340
+ O-2I
4
18 32 19 44 ' + 0-348
19 48 20 44 + 0-287
+ 2-443
+ 0791
1-96
-0'39
Montreal.
7
'7 53~ 20 4 6 + '347
+ 0-866
0-38
Aug. 1 7
20 420 44
0-080
- 4750
+ 472
8
17 56 21 38 + 0-417
+ 0-829
0-24
18
18 28 20 46
o'io8
- 4-198
+ 4'I2
9
18 5 21 3 + 0-339
+ 0-908 0-43
LEVEL ERROR.
Transit D continued.
Date.
Sidereal Time.
I
n
m
Date.
Sidereal Time.
I
n
m
Canto continued .
Canso continued .
1892.
Sept. i o
h m h m
18 5 19 30
8 til
+ 0-227 + 0-770 0-46
1892.
Sept. 14
h in h m a
17 25 20 37 + 0-197
8
+ 0-890
i
0-62
1 1
17 50 i 8 20
+ 0-209 + '8o8 0-52
'5
18 30 19 50 + 0-273
+ 0-980
o'6o
12
13
17 50 19 30
l8 48 21 20
+ 0-337 + 0-939 -0-47
+ 0-305 + 0-957 -0-53
16
18 28 19 12 + 0-629
19 40 21 17 + 0-009
-f- I'2OO
+ 0-866
-0-32
-0-86
Transit E.
Greenwich. -
Waterville.
Apr. 1 8
13 1713 38
+ 0-138
+ '495
o 40
Aug. 1 6
18 3122 58
O"225
- 0-750
+ 0-59
19
10 13 14 10
-f- 0-222
+ 0-618
0-42
18
18 7 2238
+ 0-017
+ 0-073
0-07
21
22
23
25
26
II 38-H37
10 56 14 17
II 48 12 38
II 2613 36
II 21-1343
+ O-O72
+ 0'08 1
+ o'o6i
+ 0-167
+ O'lOI
0-076
+ O'HO
+ 0-339
+ 0-387
0-16
+ O'22
0-04
o'i6
-0-32
22
2 4
25
1 8 7 1849
22 22 49
20 10 21 39
1 8 61946
18 33 o 14
O'O2I
- 0-059
0-189
- 0-075
O-OI7
0-252
0-486
1-089
+ 0-130
- 0-055
+ 0-29
+ 0-52
+ 1-08
0-29
+ 0-04
27
1253-15 o
+ 0-113
+ 0-413
-o'34
Greenwich.
Sept. 4
21 21 O 14
O-OO3
0-250
+ 0-31
Waterville.
5
1849-23 5
+ 0-038
0-316
+0-46
6
22 21 055
+ O'O3I
0-300
+ '43
May 5
11 3-1335
+ 0-287
0-119
+ 0-62
7
20 58 o o
- 0-043
- 0-331
+ 0-35
6
1054-1342
+ 0-239
- 0-295
+ 0-76
8
'935- 3
+ O"O2I
- 0-263
+ 0-36
7
II 26 13 42
+ 0-325
0-308
+ 0-91
12
19 26 23 58
O'I2I
- 0-844
+ 0-87
9
II 53-H44
+ 0-389
- 0-456
+ I-2I
'3
22 4- 055
+ 0-023
- 0-463
+0-62
ii
13 17-1529
0-103
- 0-392
+ o-33
'4
1948 o o
+ O'O2O
0-484
+0-64
13
'547-1757
0-083
- 0-325
+ 0-28
'5
20 49 014
- 0-053
0-466
+ '5
15
15 3817 20
0-051
0-360
+ 0-38
16
19 31 22 22
O'O2I
- 0-556
+ 0-67
TELEGRAPHIC DETERMINATION OF LONGITUDE, GREKNWICH-
CANSO MONTREAL, MADE IN 1892.
-WATERVILLE
XII. -CATALOGUE OF STABS.
The following stars were selected for observation during the period of longitude
work. The fourth column contains the Tabular Mean R.A. for 1892'0 given in the
Connaissance des Temps (C.T.), M. Loewy's Catalogue (L.), or the Berliner Jahrbuch
(B.J.), as shown in column 2. Column 6 contains corrections to these Right Ascensions
found by comparison of the Ephemeris, with the Catalogue given in the last
column. These corrections have been applied to the Apparent places of the ephemerides
in calculating the final clock error.
Name of Star.
Ephemeris.
Magnitude.
Tabular Right
Ascension,
iSgz'o.
Approximate
Declination.
Correction
to
Ephemeris.
Greenwich Catalogue.
4 Ceti
L.
7'o
h m s
O. 2. I2-O6
o /
3. 9
a
+ 0-04
Ten Year, 1880.
a Andromeda? .
CT
Z'l
o 2. 48-20
+ 28. 30
+ - o6
Five Year, 1890.
B Cassiopeisc
B J
2"!
O t,. 24'QO
-h 58. 33
B.A.C 17
L.
C-Q
o. 4. 47' 1 1
c. ci
0-05
Ten Year, 1890.
V Pecrasi
CT.
z-8
o 7. 4O"?7
+ H- IS
+ 0'05
Five Year, 1 890.
13 Ceti
C.T.
5-5
O. 2O. 4T2I
4. II
+ 0-09
Ten Year, 1890.
Cassiopeise
B.J.
4-0
o. 30. <;7'28
+ 53- l8
0-05
Ten Year, 1880.
15 Ceti
L.
67
o. 32. 33'i i
f
1.6
0'02
Ten Year, 1 890.
S Andromedse
B.J.
V3
o. 33. 33-18
+ 30. 16
O-06
Ten Year, 1880.
a Cassiopeiee
ft Ceti
C.T.
C.T.
'3
Z'2
o. 34. 2275
O. 38. Q'QQ
+ 55-57
18.35
0-04
+ 0-09
Five Year, 1890.
Five Year, 1890.
2 1 Cassiopeia^ . .
B J
6-0
O. 38 3I'2C
+ 74. 24
o-oi
Ten Year, 1880.
5 8 Piscium
L.
5 '6
o. 4.1. 23-31
+ H. 23
+ 0-08
Ten Year, 1880.
Andromedss
B J.
4*1
o. 41. 36-70
+ 23- 41
+ 0'02
Ten Year, 1880.
S Piscium
C.T.
4-8
0.43. 4'66
+ 7. o
+ O'OI
Five Year, 1890.
v Andromedse
C.T.
4'5
o. 4.3. : 1-23
+ 40. 2 9
+ 0-08
Ten Year, 1880.
20 Ceti
L.
5'O
o. 47. 20-18
i. 44
+ 0'06
Five Year, 1890.
y Cassiopeia?
C.T.
2-3
o. 50. 11-32
+ 60. 8
+ 01 I
Ten Year, 1880.
77 Piscium
L.
6-0
. o. 13-84
+ 4. 20
0-08
Ten Year, 1880.
[ji Cassiopeise
C.T.
?'1
J
. i. 5'io
+ 54. 23
O-O4
Ten Year, 1880.
[3 Andromedse
T Piscium
C.T.
L.
2'2
4'C
3-4'99
. 5. 42-60
+ 35- 3
+ 20. 31
+ o - o6
+ o-oi
Five Year, 1890.
Ten Year, 1880.
v Piscium
B.J.
4'I
. 13. 31-78
+ 26. 42
rj Piscium
C.T.
VI
2C. 42"I4
+ 14. 47
+ O'02
Ten Year, 1880.
40 Cassiopeise . . .
B J.
5-6
2Q. C?'^'?
+ 72. 20
+ O'OQ
Ten Yean, 1880.
43 Cassiopeia^
B.J.
6-0
^4. 2O'64
' *
+ 67. 30
O-I4
Ten Year, 1880.
<t> Persei
B.J.
4'O
. 1.6. C^-47
+ ?O. Q
o Piscium
C.T.
4'4
. -;Q. 41-41
+ 8. 37
o"o6
Five Year. 1 8qo.
1 Ceti
B.J.
3-0
. 46. 7-74
10. 52
0-03
Five Year, 1 890.
f Piscium
B.J.
4'O
. 47. 57-84
+ 2. 30
50 Cassiopeise
B.J.
4'O
. C4. 13'co
+ 71- 54
0-09
Ten Year, 1880.
y Andromeda)
B.J.
2 -4
. e7. i6'i6
+ 4-1- 49
0-05
Five Year, 1890.
a Arietis
CT.
2'I
2. I 5"O2
+ 22. 57
+ 0-03
Five Year, 1890.
P Trianguli
B.J.
vo
2. 3. 7'O3
+ 34- 20
+ O'4
Ten Year, 1880.
67 Ceti
C.T.
c-6
2 I I. 3C'7O
- 6. 55
+ 0-04
Five Year, 1800.
2 Ceti
C.T
4/e
2 22. 24,'QI
4- 7. CO
+ O'O2
Five Year, 1 890.
36 H. Cassiopeise
B.J.
i
5-6
2.27.46-31
+ 72- 21
- 0-31
Ten Year, 1880.
CATALOGUE OF STARS.
Name of Star.
Ephemeris.
Magnitude.
Tabular Right
Ascension,
iSgz'o.
Approximate
Declination.
Correction
to
Ephemeris.
Greenwich Catalogue.
v Arietis
B.J.
T6
h m B
2. 32 4O'q8
/
+ 21. 3O
i
O'OO
Ten Year, 1880.
8 Ceti
B.J.
4'
2. 33. ;6'8o
- o. 8
+ 0-04
Five Year, 1890.
47 PI Cephei
B J.
6-0
2 ?! J.4'68
+ 78. qq
O'l C
Ten Year, 1880.
a Ceti
C.T.
2-6
2. c6. 37'q6
+ 3. 4
o-oo
Ten Year, 1880.
fi Persei
C.T.
2'3
T. I. 8'4O
+ 40. 32
+ O"O7
Ten Year, 1880.
u 2 Hydrce
C.T.
47
q. 5q. 52'oo
12.32
o'oq
Ten Year, 1 890.
n Leonis
B.J.
3*3
" 3V J
10. i. 2677
+ 17. i?
O'ot;
Ten Year, 1880.
Re^Tiltis
C.T.
1*3
IO. 2 37'iq
+ 12. 3O
+ O'OI
Five Year, 1890.
34 Leonis
L.
6-0
10. c. 49-62
4- 13. 53
+ o'io
Ten Year, 1890.
X Urs93 Majoris
B.J
V,
3 ^ v
IO IO 74'QQ
+ -U 27
O'OC
Ten Year, 1880
yi Leonis
C.T.
2'5
10. 14. 1-03
+ 2 - 2 3
4- o'oe
Five Year, 1890.
A 2 Leonis
L.
6-2
10 16 i'8i
+ 1 1. 3i
+ O'O4
Ten Year, 1890.
43 Leonis
L.
6-7
IO 17 2 I'32
+ 7. 1
O'O2
Ten Year 1880.
50 Leonis
6-0
10. 33. 6'q3
>
+ 16.41
O'OI
Ten Year, 1880.
34 Sextantis
L.
7'o
10. 37. 2'8z
+ 4. 8
4- 0-03
Five Year, 1890.
37 Sextantis
C.T.
6 '4-
10. 40. 28^28
+ 6 ' 57
O'OI
Ten Year, 1880.
1 Leonis
C.T.
5*3
IO. 43. 347Q
+ 11.7
4- O'O2
Five Year, 1890.
ft Ursse Majoris.
C.T.
2 '4
10. ;c. 10*48
+ 56. ;8
O'i7
Ten Year, 1880.
a Ursse Majoris
C.T.
2'O
IO. C7. ^'74
+ 62. 20
O'lO
Five Year, 1 890.
Y Leonis
C.T.
4'8
IO ?Q 26'7^
+ 7. I?
-I- O'OI
Five Year 1 890
<f/ Urgoe Majoris
C.T.
3'2
. T.. 'I C*c6
+ 4-5. 5
0-08
Ten Year, 1890.
/3 Crateris
C.T.
4'4
6 20-85
22. 14
O'l I
Ten Year, 1 890.
S Leonis
C.T.
27
. 8. 21'QO
+ 21. 7
O'O2
Five Year, 1890.
jB 5 Leonis
L.
5'6
. 8. I r8c
+ o. 31
0-06
Ten Year, 1880.
B.A C 3837
L.
C'Q
8 2s'OQ
+ 8. 3q
O'O?
Ten Year, 1880
f & - Ursre Majoris..
v Ursse Majoris
C.T.
B.J.
3-8
3-3
. I 2. 2j'l6
. 12. 38-86
+ 32- ^
+ 33-4-1
+ 0-15
o-iz
Ten Year, 1880.
Five Year, 1890.
8 Crateris
C.T.
3'Q
I 3. <;6-47
14. 12
O'OC
Five Year 1890.
<r Leonis
B.J.
4' I
i c ^J.'c6
+ 6. 37
O'OO
Ten Year, 1890.
B.A.C 3863
L.
7'o
. I C. s^'QZ
+ 7- 14.
Groombridge 1771...
8 3 Leonis
B.J.
C.T.
6-1
6-2
. 16. 25-86
21 I7-21;
+ 64.55
+ 3. 36
+ O'OI
Ten Year 1 880.
B.AC. 3911
L.
7-0
. 24- C'26
+ 8. 12
A. Draconis
B.J.
V3
H. ZQ'4.6
+ 6q. 55
O'IO
Five Year, 1 890.
Hydras
B.J.
4'O
27 4I*4O
31.11
v Leonis
B.J
4-8
^ I 2 C*I 2
O. 14
O'O3
Five Year 1890
u) Virginis
L.
6-0
. S 2 - ^ V4-C
+ 8. 44
4- O'O2
Ten Year, 1890.
3 Draconis
B.J.
C-7
^6 26*02
n
4- 67. 20
O'2O
Ten Year 1880
Crateris
C.T.
5'2
. ^Q. 17*28
17-45
+ O'O2
Ten Year, 1880
Virginis
L.
5*O
. ^Q. 4-2'QQ
+ 8 - 5 1
+ O'O?
Ten Year 1890
v Virginis
L.
4'C
. 40. i 8*44
+ 7-7
-4- o'o^
Ten Year, 1890.
Y Ursru Majoris
B.J.
3*8
.40 20*84.
4- 4.8. 23
O'OI
Ten Year 1880
n Leonis
CT.
2'2
j.7 t7'OI
4- I ? 1 1
+ O O3
Five Year 1890
/3 Virginis
C.T.
1*7
4;. 4-16
4- 2. 22
O'O2
Five Year, 1890
Groombridge 1830...
y Ursoe Majoris
C.T.
C.T.
6-4
2*4
.46.45-23
4.8 Q'O^
+ 38. 30
4- 14. 1 8
0*05
O'o8
Ten Year, 1 890.
Five Year 1890
b Virginis . . ..
L.
6-0
. C4 2 C'OO
-4- 4. I C
I O'OI
Ten Year 1880
TT Virginis
C.T.
4-6
II. CC. 2O'2C
+ 7. 13
+ O'OJ.
Five Year 1890
o Virginis
CT.
4-'i
II sQ 42*40
J- Q 2O
O'OC
Five Year 1890
e Corvi
C.T.
rz
12. 4. 34"2I
22. I
O'OA
Five Year 1 890
10 Virginis ...
L.
6-0
12 d. Q"22
1 2 IO
Ten Year 1890
1 1 Virginis
L.
6-0
12 4. ^^'14
-I- 6. zc
O'l I
Ten Year 1890
4 H. Draconis
B J.
4-6
12 7. 8*13
4- 78. M
O'o6
Ten Year 1880
46 TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH WATERVILLE-
CANSO MONTREAL, MADE IN 1892.
Name of Star.
Ephemeiis.
Magnitude.
Tabular Right
Ascension,
1892-0.
Approximate
Declination.
Correction
to
Ephemeris.
Greenwich Catalogue.
8 Ursae Majoris
B J
3 '4
ll 111 S
12 IO. 4"8c
+ 57- ^8
s
0-08
Ten Year, 1880.
if Virginis
B.J.
V?
12. 14. 22'8o
O. 4
O'O3
Five Year, 1 890.
B.A C. 4201
L
6-0
12 22. 23'<O
- 8. 4
0-33
Ten Year, 1880.
8 Corvi
CT
VI
iz 24 i6'8i
I q Cs
O'27
Five Year, 1890.
20 Comae
B.J.
6-0
I z. 24. I7'7Q
+ 21. "?O
a Vireinis . .
L.
60
12 28. I2'3I
- 8. 51
O'l I
Ten Year. 1800.
ft Corvi
C.T.
2-8
iz 28. 42^67
22 48
-\- O"I2
Five Year, 1890.
K Draconis ....
B J
,.,
12 28 522I
+ 7O 23
4- o'io
Ten Year, 1880.
8 Canum Venaticum.
2 3 Comae
B.J.
C.T.
4'3
4-'Q
12. 28. 36-83
12 29 28'6i
+ 4L57
+ 2313
+ 0-03
o'c i
Ten Year, 1880.
Ten Year, 1890.
24 Comae (2nd star) ..
f Virginis
B.J.
C.T-
5-2
r-q
12.29.4277
12.31 I 3'6o
+ 18. 58
c 14
0-04
o'o6
Ten Year, 1880.
Ten Year, 1880
B.A.C 4254 .
L.
TO
12. 32 C2-O.2
+ 2 26
0-16
Ten Year, 1890.
Y Virginis
L.
5-0
12 33. 4O'3 I
7 24
O"O2
Ten Year, 1880.
yi Virginis . . . .
C.T
2'Q
12361 1*29
o. 5 1
O'lQ
Five Year, 1890.
76 Urs88 Majoris
B.J.
6-0
iz. 36. CO'77
+ 63 18
O'O7
Ten Year, 1880.
B.A C. 4.277 .
L.
6-0
12 38 C/O7
o CQ
4- O'l 2
Ten Year, 1890.
3 5 "Virginis .
L.
6-0
12 42 21'46
4- 4 Q
O'OJ.
Five Year, 1890.
37 Virginis ..
L.
6-0
12 46 7'O2
+ 3-38
o"o6
Ten Year, 1880.
3 8 Virginis
L.
60
12. 4.7 ^Q'^ s
2 ;8
O'O"
Ten Year, 1 890.
i/f Virginis
L.
C'O
1 2 j.8. a.d.'i6
8 57
4- o'Os
Ten Year, 1880.
TJrsse Majoris
CT.
I'O
12 Q 1 6x6
o. D/
+ C.6 33
4- o"o6
Ten Year, 1880.
CT
3'C
] 2 CO Q*7Q
4- 3 CQ
O'O2
Five Year 1890
a Canum Venaticum.
8 Draconis
C.T.
B.J.
3 - 2
C'o
12.50.58-47
12. 5 I 10-63
+ 3.54
+ 66. i
4- 0-06
0-14
Five Y r ear, 1890.
Ten Year, 1880.
c Virginis
L.
3'o
12 56 48-06
4- 11.32
O'O2
Five Year, 1 890.
48 Virginis
L.
6-0
12 58 20*48
2 C
O"O4
Ten Year, 1890.
Virginis
C.T.
4-6
13. 4 21'J.C
4. ^8
O'O2
Five Year, 1890.
(3 Comae
C.T.
4.'4-
13. 6 co'oS
4- 28. 26
O'OQ
Ten Year, 1 890.
5 8 Virginis
L.
6-0
13 II. 47'6o
Q CQ
O'o6
Ten Year, 1880
6 1 Virginis
C.T
4'Q
13 12 AC'3 C
1 7 4.3
O'OQ
Ten Year 1880
65 Virginis
L.
to
13 17 42"Q4
422
+ O-OQ
Ten Year, 1880.
y Hydras
B.J.
VI
13 13 2'Q I
22 36
+ O'OI
Ten Year, 1880.
66 Virginis ...
5'8
13 l8 4Q'C7
a. 3 c
Ten Year, 1 890
Spica
C.T.
I'l
13. IQ. 3O'I4
10 36
4- 0-02
Five Year, 1 890.
Groombridge 2001 ...
69 H. Ursie Majoris .
1% Virginis
B.J.
B.J.
L.
57
5'3
C'O
13. 23. 22-77
13.24.29-32
I* 26 2O'Q3
+ 72-57
+ 60. 30
C 42
0-07
4- o'oi
Ten Year, 1880.
Ten Year 1880.
L
c-6
13 27 i6"66
Q 37
) 0*06
Ten Year 1890.
Virsinis..
C.T.
v6
I 3. 2Q 11-38
7- Jl
O3
O'O 3
Five Year, 1 890.
80 Virginis
L.
6-0
I 3 2Q. Cd_'l6
1 C I
O'O4-
Ten Y'ear 1890
17 H. Canum Ven....
25 Canum Venaticum
in Virginis
B.J.
C.T.
C.T.
5'5
5'i
C*4.
13.29.58*41
13- 32. 39*9 J
7 2 C C6"C C
+ 37-44
+ 36-51
- 8 q
~ o'03
0'2O
O'O2
Ten Year, 1880.
Ten Year, 1 890.
Five Year 1890.
B A.C 4572
L
7'O
i ^. ^8 i6*Qi
J. C7
4- 0-08
Ten Year 1890
8 6 Virginis ...
I,
6-0
I ^ J.O IO'O 3
II C3
O'O I
Ten Year 1880
88 Virginis
L.
7O
I 3 4.2. ^8'82
- 6. 18
4- O-OQ
Ten Year, 1890.
T Bobtis
B.J.
4-6
1 1 4.2. 7'8 I
4- 18 o
o'oc
Five Year 1890
ti UrssB Majoris
C.T.
I'D
IJ AT. I7'14.
+ J.O. C I
O"O3
Five Year 1 890
t] Bob'tis
CT.
7
2'8
I 1 A.Q 12 'C4.
4- 18. c6
O'O2
Five Year 1890
T Virginia
C.T.
4/4
I ^. C6. 8'QC
4-24.
O'OO
Five Year, 1 890.
a Draconis
C.T.
3'7
14. i. 27^86
4- 64. C4.
4- o'oc
Five Yeai 1890
CATALOGUE OF STARS.
Name of Star.
Ephemeris.
Magnitude.
Tabular Right
Ascension,
1 892*0.
Approximate
Declination.
Correction
to
Ephemeris.
Greenwich Catalogue.
tl Bootis .
B.J
r 'n
h in &
/
+ 2 C ^6
0*02
Ten Year 1880
K Vir^inis .
B J
4*
14. 7 8 *o6
4 Ursoe Minoris
B.J.
3
5'O
Ho 1 6 i 8
V' 4 U
-i- 7$. 4
-j- 0*02
Ten Year 1880
Arcturus . .
CT
~^> I *O
+ O-OC
X Bootis
B J
J.'O
14 12 i6'6?
ly. 93
+ i6 ^ C
_1_ O'OI
Ten Year 1880
X "Virginia
CT.
T
4.'7
14. 1 3 1C 'Q4.
4 U< 3j
12 C2
o*ot
Ten Year 1880
2 Librae
L
6-0
HI 7. ^6*8 J.
II I 3
-|_ 0*06
Ten Year 1880
Bootis
B.J
r8
14 21 ^I '2O
+ C2 21
106 Virginia
L
6-0
I j_ 22 CQ'8 C
6. 2C
+ 0*04.
Ten Year 1880
p Bootis
CT
v6
+ 7O C I
y Bootis
B J
2*Q
3 U - !> *
4. -18 4.7
-j O'O2
Ten Year 1880
Bootis
C.T.
* 7
V8
H2C CQ',12
-4- I J. 12
+ O"O2
Ten Year 1880
IT Bootis(ist star)
/j. Virginia
B.J.
L
4'3
A'O
14. 35. 39-00
+ 16.53
C Q
+ 0-05
O'O2
Ten Year, 1880.
Ten Year 1880
5 Libra?
L
6-0
V 7
I C O
+ O'OC
Ten Year i 890
109 Virginia
BJ
r6
i^. ^u. u ^vy
1 V M
+ 2 21
Ten Year 1880
a 1 Librae
CT
5 -7
Ten Year 1880
a 2 Libra
C.T
/
2*O
. q.^.. ^.z uy
1 3- 33
1C l6
+ O'O^
Groombridge 2164....
* Libra
B.J.
C T
* 7
5-8
t-6
TT JT *T
14. 48. 41*90
+ 59-44
- in cS
/? UrssB Minoris ..
C T
5
14. 50. 5 4 41
(8 Bootis
CT.
2 '7
HC 7 C 2'6 C
/4- 3 U
f O'O I
Five Year 1800
\fr Bootis
C T
4-6
" >/ p* **3
4^. 4^
_|_ o*O2
B.A.C 4084...
L
J
6*O
* DV- 4V uu
i 1 Librae
L
c*o
1 3- 3' 33 '4
i c 6 ?'8o
*3 - 34
+ O'O C
8 Bootis
CT.
5- P
ic ii H *oc
Ten Year 1880
P Librae
B J
3 3
2'O
> y^
ic ii ii '68
33- 43
8 CQ
i H. Ursae Minoris...
/j. Bootis
B..J.
B J
5*3
v8
15. 13.23-89
o. 5^
+ 67.45
+ 77 ^ r
+ 0-04
-I- O'OI
Ten Year, 1880.
Ten Year 1880
/3 Coronas
B J.
2-8
i >. *^ -^4 ^/
i/- "t)
Ten Year 1880
y Librae
L
zy. 29
J_ O'OC
Ten Year 1880
v 1 Bootis....
B J
a Coronee
C.T
5
2 '3
1 !> */ 3 uz
1530 6*88
41. i i
+ 27 C
a Serpentis
CT
2*7
i c 38 c^-8-2
*/ 3
-1- 6 ^6
ft Serpentis
I! J.
16 /
*
1 5- 3- i u 3
1C J_I 12'IA
+ | r ^A
+ o*oc
Ten Year i 880
K Serpentis
B J
J."O
i y 4.1. i i i^.
i ;,. /^u
4- l8^Q
Ten Year 1880
ft, Serpentis ....
B J
T w
3*2
1 b- 43- S* / *
ic ,1 1 c 8'n8
4 6
Ten Year 1880
e Serpentis
B J
J
32
1 5* 43- 3 y
J' u
4- ^ A 8
Ursae Minoris
C T
5
4/6
1 5. 45. 25 09
T 4- 4
4- 78 8
Five Year 1800
f Coronae
B J
T
4*O
1 ->" T/' -)-> 7 U
Ten Year 1880
ft 1 Scorpii
C T
w
1 3- !>3- 95
TPTI VPIIT ififio
6 Draconis
B.J
?
?'O
1 5- 5V- 9 4
1C CO C 2 'OC
J 9- 33
4- c8 ci
- - O'l 7
Ten Year 1880
S Ophiuchi
C T
2'8
1 > !>V i* u i
I i- i 1
U 1 /
cr^ Coronae .
C T
3- Z 5
4-^1 8
f Ophiuchi
B J
3
+ 34- 8
A 26
o 14
0*08
TAII Vpjir iSSn
19 Ursae Minoris
IQ Scorpii...
B.J.
L
j
5-8
6'o
16. 13. 54-26
4- 20
+ 76. 9
-|- O'l I
Ten Year, 1880.
Ten Year 1800
T Herculis
B J
3*2
Z 3- 55
4- xfi 5^
Tpn Vpar I SSo
y Herculis ...
B J
3
r 4- 34
p Ophiuchi
L
1
5*0
u
iu. i /. y j i
16 IQ 6*42
19. 24
Ten Year 1890
v Ophiuchi...
L
S'O
*3- l *
18 17
rj Draconis
CT
u
2-8
4- 6 1 46
/? Herculis
B J
u /z
i Q'o8
Tpn Ypar i Sfin
A Draconis
B.J
3
C'O
iu. z^. 34 ijo
16 28 1 1 *c8
21. 44
Ten Year 1880
4$ TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH-
CANSO MONTREAL, MADE IN 1892.
-WATERVILLE
Name of Star.
Ephemeris.
Magnitude.
Tabular Right
Ascension,
i Sgz'o.
Approximate
Declination.
Correction
to
Ephemeris.
Greenwich Catalogue.
f Ophiuchi
B.J.
2-6
h ra s
16, 31. 12*67
IO. 2 I
&
O O2
Five Year, 1890.
n Herculis
B J
VI
16. 30 1 1-6?
+ 39- 8
O'o6
Ten Year, 1880.
Groombridge 2277...
4.9 Herculis ...
B.J.
L.
5-0
6-0
16. 43. 1 5-02
l6 4.7. Q'8o
+ 56-58
H- I C. Q
O"O2
Ten Y.-ar 1 890.
K Ophiuchi
CT
3'4
16. cz v^'27
+ Q. ?"?
+ O'OC
Five Year, 1890.
c Herculis
CT
3'Q
16 c6. o'?4.
-1-71 C
+ o'o;
Five Year 1890.
c Ursse Minoris
C.T.
4'C
16. ey. v6
+ 82. 13
O'Cl
Five Year, 1890.
Draconis
B,I
3-0
17. 8.28-47
+ 6c. ci
O'O2
Ten Year, 1880.
<x* Herculis
CT
VI
17. Q. 4.^"^ I
4- 14 ^? I
4- 0-02
Five Year, i 890.
8 Herculis....
CT.
33
17 IO 3C'C I
4- 24 ^8
+ 0-18
Ten Year, 1890
b Ophiuchi
L.
I'O
17. IQ. 46*^8
24. c
O'O2
Ten Year, 1880.
tr Ophiuchi
L.
C'O
17. 21 0-26
+ 4 14
4- o - O4
Five Year 1890.
B Draconis ...
CT
VO
17 27 KQ'4.2
+ ?2 23
4- O'o8
Five Year 1890.
a Ophiuchi
C.T.
2'2
17. 20. CC'lSJ
-T 12-3 8
4- o'O4
Five Yeiir, i 890.
3 Safittarii
L.
TO
17. 4.O. J.C'62
27. 47
4- O'l C
Ten Year 1880.
ft, Herculis
C.T.
|*(
17. 42. i V78
+ 27.47
+ 0-07
Five Year, i 890.
BAG. 6060
L.
67
17. 40. 3 Vsl
18.47
+ 0-28
Ten Year, 1880.
v Ophiuchi
C.T.
3-6
17. C^. 4'8-?
Q. 46
O'O3
Ten Year, i 890.
y Draconis
CT.
2'C
17. C4. C'Q'?
+ ? I. 3O
O'lO
Five Year, 1890.
67 Ophiuchi
L.
4'O
17. ? . li'I?
+ 2. c6
O'O2
Ten Year, 1 890.
L.
C'O
17 CT <1C'OC
-1- 2O CO
-1- O'O2
Ten Year 1880
p l Ophiuchi
CT
4.' 2
17. CQ- CQ'62
4- 2. 32
4- O'24
Ten Year, 1890.
17 Serpentis
CT.
*'E
I 8. Is. 4V27
- 2. 56
O'O4
Five Year, 1890.
21 Sa ir ittarii
L
C'O
l8 I 8. CC'OI
2O. 36
4- O'Oi
Ten Year 1880
BJ
3'8
1 8 23. 0-18
+ 7 2 41
4r O'O2
Ten Year, 1890
i Aq uiliB
L.
c-6
l8 2Q. IQ'7I
8. 19
O'OO
Ten Year, 1880.
a Lyrse
CT
> I'O
18. n. 16-84
+ VS 41
4- O'OC
Five Year, 1890
2 Aquilse .
L
C'O
I 8 36 2 I "72
Q Q
O'l J.
Five Year 1 890
1 1 o Herculis
B J.
4/O
18 41. 0*80
y. y
4- 2O. 27
O'OO
Ten Year 1890
29 Sa< r ittarii
L.
6-0
l8. 4V I C'C4
20. 27
O'O4
Ten Year, 1880.
j8 l Lvrse . . .
CT
3-6
1 8. 4.6. ;*j.4.
4- 33 14
O'OO
Five Year, 1890
e Aquilse
L
4*O
I 8. ;A. J.^'i8
4- 14 C S
-4- O'O2
Five Year 1890
y Lvrae ..
C.T.
2'2
iS. C4- C4.*I7
+ 32 5J
4- o'o;
Ten Yenr, 1880.
o Sagittarii
L
4, c
18. 58. 12-63
ZI ?4
4- O'O2
Ten Y.'ar 1880.
Aquilse
CT
VI
IQ O. 26*C7
4- I 3 42
4- 0-16
Five Year 1 890
TT Sagittarii
C.T.
VI
IQ. 3. 2O'27
21 12
+ O'OA.
Ten Year, 1880.
d/ Sagittarii
L
C'O
io 1 1 - i S-QO
IQ Q
O'OO
Ten Year 1880.
B J
3*O
IO I 2. 1 1 "1 C
*7' 7
4- 67 28
O" I 2
Ten Year 1880
CD Aquilce
CT
C'
I Q 12. AJ/74.
4- I 1 24
-f- O'OC
Five Year 1890
B J
4'O
IQ IA. l6'A.1
4- C3 IO
O'OC
Ten Year 1880
p 1 Sagittarii
L.
4"O
I Q. I C 24-*4.4.
l83
"h O'O7
Ten Year 1 890
u Sa a ittarii
L
S'O
IO 1C ?2'J_2
1 6 i o
4- O'o8
Ten Year 1 890
T Draconis
BJ
4/8
1 V' * b' $* *1-^
IQ 17. ^?7'72
-4-73 Q
o'o6
Ten Yfar 1890.
b Aquilie
C.T
C'3
IO IQ J.Q'^2
+ 1 I 4.3
O'l 2
Ten Year i 890
8 Aquilse
CT
3'C
ly. iy. ^.y .ji
+ 2 C4.
_i_ 0*06
Five Year 1890
fli Cveni
C.T.
J
3 'I
+ O'OQ
Ten Year 1880
C T.
5*0
7 l6
1 O'OI
Ten Year 1880
<r Aquilae
L.
u
C'O
I O ^^ C I "7 A.
_1_ r Q
4 O'OI
Ten Year 1880.
j8 Sagittae
L.
4*C
'V' ^J- D 1 / +
IQ ^6. I I *8 I
V 7
-\- 17 14
O'O4
Ten Year 1880
L
S'O
2O I
|. O'OI
Ten Year 1880
y Aquilse
C T
w
2 '8
+ O'O3
*V* T*' / TT
CATALOGUE OF STARS.
Name of Star.
Ephemeris.
Magnitude.
Tabular Right
Ascension,
1892-0.
Approximate
Declination.
Correction
to
Ephemeris.
Greenwich Catalogue.
8Cv fr ni
C.T.
2"Q
h in B
10. 4.1. 3CQ 1
O '
+ 44 C.2
a
+ O'OC
Ten Year, 1880.
8 Sagittae
L.
4-'O
IQ. 4.2. 34'22
-f 18. 16
4- O'OQ
Ten Year, 1890.
a AquilcB
C.T.
> I'O
IQ. 45. ^0-78
+ 8. 35
4- o'oi
Five Year, 1890.
77 Aquilas
L.
4'
19. 46. 58-18
4- o. 44
4- o'oi
Ten Year, 1880.
e Draconis
R Aquilse .
B.J.
C.T
3-8
VQ
19.48.32-19
IQ. CO. O'43
+ 7-
+ 6 8
0-03
4- o'oi
Ten Year, 1890.
Five Year, 1890
i!/ Cvsni ..
B.J.
C'2
IQ. C2. CO-2C
-4- 52. Q
O'O3
Ten Year, 1880.
y Sagittae
B.J.
3-6
IQ. CJ. C7-23
+ I9. I 2
O'O4
Ten Year, 1880
Aquilse ...
C.T.
--
20. ;. 41-87
i 8
-4- o'o^
Five Year, 1 890
o- Cveni
BJ.
4* 5
20. 10. 1 3"86
-1- 46*2?
O'OO
Ten Year 1880
a 1 Capricorni .
C.T
4" A
20 11. 39-66
12 CO
-4- O'oi
Ten Year 1880
a 2 Capricorni
C.T.
VI
20. 12. ^'67
12. C3
4- Q'O7
Five Year 1890
K Cephei
B.J.
4'3
20. 12. 31-08
4- 77 23
+ 0-08
Ten Year 1880
o~ Capricorni
L.
5-6
2O. I 7 Q"6c
IQ 27
O'O2
Ten Year 1 880
/3 2 Capricorni
C.T.
VI
20. 14. q6';3
I C. 7
4 Q-Q4
Five Year 1890
B A.C. 7014
L.
c-6
2O. 17. 4Q'6o
+ C.
O'C2
Ten Year 1880
C.T
2'3
20. 18 21-05
+ 70 CC
-I- O'O3
Ten Year 1880
CT
C'O
2O 22 4I'Q3
18. 10
4- 0-08
Five Year 1890
69 AquilcB
L.
C'O
20.24. ' 2 5
3. 15
4- 0-05
Ten Year, 1890.
Cephei
B.J.
4'O
20. 27. 46-1 ?
+ 62. 38
4- 0-03
Ten Year 1880.
c Delphini
L.
4.'O
20. 28. 3-11
+ 10 56
4- o-oc
Five Year 1 890
/3 Delphini
L.
4*O
2O. 12. 28-Q8
+ 14- I 3
-\- o'o6
Ten Year 1 890.
73 Draconis
B.J.
C'l
2O. 72, CC'74
4- 74 31
O'lQ
Ten Year 1880
v Capricorni . . .
L.
c-6
2O. 7?. C4/O3
1831
4- O'O^i
Ten Year 1890
a Delphini
C.T.
VQ
20. 34. 37'3o
4- I C 32
0-04
Five Year 1890
a Cvsni ..
C.T.
1-4.
20. 37. 44-86
4- 44- C.4
4- O'OQ
Five Year 1890
Aquarii
B.J.
r6
J / f-'r
20. 41. 4076
Q C.3
O'OI
Five Year 1890.
E Cveni ..
C.T.
2-6
20. 41. 50-41
4- 33. 34
4- 0-04
Ten Year, 1890,
3 Aquarii
C.T.
4'7
20. 42. 2-24
C. 2C
4- 0-03
Ten Year 1880.
fj Cephei
B.J.
3-6
20. 43. C-C5
+ 61 25
O'O7
Ten Year 1880
1 5 Delphini
L.
6-0
20. 44. 28-91
+ 12. Q
4- o-o*
Ten Year 1880
w Aquarii .
C.T.
4-8
20. 4.6. 4.0*67
Q. 2?
4- 0-02
Five Year 1 890
19 Capricorni
L.
6-0
20. 4.8. 41*63
18 20
O"O3
Ten Year 1880
32 Vul^eculse.
C.T.
IT'I
2O. 4Q. C7'3?
4- 27. 3Q
4- o j o6
Five Year 1890
16 Delphini
L.
6-0
2O. 50. 29-32
4- 12. Q
4- o'oi
Ten Year i 880
v Cvsni...
B.J.
4O
20. . 8-82
+ 4O. 4.C
o'o6
Ten Year 1890.
2 o Capricorni
L.
6-0
20. 53. 27-86
IQ. 27
O'OI
Ten Year, 1880
21 Capricorni
L.
6-0
20. 54. 47-00
17. 57
4- 0-04
Ten Year, 1 800.
rj Capricorni
L.
5-6
20. 58. I 5-44
20. 17
4" O'O2
Ten Year 1890
6 Capricorni
L.
4/c
20. 59. 52-48
17. 40
4- 0-07
Five Year, 1890.
6i l Cygni
C.T.
5'4
21. 2. 3-05
4- 38. 13
4- O'2C
Ten Year, 1 890
6i 2 Cyffni...
C.T.
K
21. 2. 4'66
4- 38. 13
4- O'lQ
Ten Year, i 890
27 Capricorni
L.
6-0
21. 3. 22't4
2O. CQ
4- o'oc
Ten Year 1890.
y Equulei
L.
C'O
21. C. t'3I
+ Q 42
O'OO
Ten Year 1890.
Bradley 2777.
B.J
C'8
21. 7 WI3
-f- 77 J.I
.4- O'OO
Ten Year 1880
t Cyf'ni...
C.T.
3-3
21. 8.20-27
-f- 2Q. 47
+ O'IO
Five Year 1890.
a Equulei
L.
4'O
21. !O. 2C'43
-(- 4.. 48
+- 0*04
Five Year 1890
T Cygni
C.T.
3-8
21. 10. 2870
+ 37. 3^
4- O'O2
Ten Year, 1880.
30 Capricorni
L.
6-0
21. II. 53-78
18.26
+ O I I
Ten Year, 1890.
<r Cvgni ..
C.T.
4-'<?
21. 13. 1O'32
+ 38. C7
-1- O'lO
Ten Year 1 880.
a Cephei
C.T.
2-6
21. 16. 0-14
+ 62 8
O 1 2
Five Year, 1890
i Capricorni
L.
5-0
21. 1 6. 14-02
17. 18
o'o6
Five Year, 1890.
Capricorni
B J.
4'I
2 1 . 20. 30*08
22 C 3
4~ o'o6
Ten Year i 890
fi Aquarii
C.T.
2'Q
21. 2C. J2'36
- 6. 3
4- o'O3
Five Year, 1890.
GREENWICH OBSERVATIONS, 1892.
TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH WATERVILLE
CANSO MONTREAL, MADE IN 1892.
Name of Star.
Ephemeris.
Magnitude.
Tabular Right
Ascension,
1892-0.
Approximate
Declination.
Correction
to
Ephemeris.
Greenwich Catalogue.
/3 Cephei
C.T.
L.
B.J.
L.
C.T.
L.
C.T.
C.T.
B.J.
L.
C.T.
L.
C.T.
B.J.
L.
L.
L.
C.T.
B.J.
L.
C.T.
L.
C.T.
L.
B.J.
L.
L.
B.J.
C.T.
C.T.
C.T.
B.J.
L.
L.
B.J.
C.T.
C.T.
B.J.
C.T.
C.T.
C.T.
L.
B.J.
B.J.
L.
L.
C.T.
L.
B.J.
C.T.
B.J.
C.T.
3'4
5-0
5-0
5-6
3-8
5'
2-4
2-9
4'3
5 '.
67
5-8
4-0
6-0
4-0
3 '4
4-8
6-0
4'4
6-0
1
6-0
4"4
5'
6-0
4-0
4-2
3'5
3-0
4-0
4-0
4-0
3'4
3-8
3'4
3-6
2'5
3-8
5-6
4-6
6-0
s;
5'
4-6
4'5
5-8
5'
h m s
21.27.15-85
21. 31. I-gi
21. 32.37-2I
21.34. 4'4
21.34. 6-42
21.36. 37-58
21. 38. 52-88
21.41. 4-68
21. 42. 48-22
21.47.24-40
21.48. 8-81
21. 56. 31-85
22. 0. 14-12
22. I.43-5
22. I. 58-89
22. 3. 3'53
22. 4.45-03
22. 7. 6-26
22. 7-4379
22. II. 0-86
22. II. 8-04
22. 13. 12-89
22. l6. 4-68
22. l8. 39-89
22. 19. l8'75
22. 24. 55-83
22.25. 5770
22. 26. 50-50
22. 29. 48-29
22. 36. 4-39
22. 37- 5 6 -29
22.41.19-73
22.43. 52-33
22.44.47-32
22. 45. 5O-IO
22. 46. 58-65
22. 48. 55-01
22. 56. 57-IO
22. 58. 32-25
22. 59. 22-78
23. 3.41-22
23- 4.35-9
23- 4- 2779
23- 8. 4-93
23. 8. 43-66
23. 10. 13-89
23. 11.33-91
23. 13.20-55
23. 15. 17-46
23. 19.59-27
23. 20. 2-43
23. 21. 23-76
+ 70. 5
- 19.57
+ 39- 5 6
- '7- 9
19. 22
+ 9.23
~ 16.37
- H- 4
+ 25.25
- 17.29
- 0.51
+ 62. 16
+ 24.49
- 19- 3
+ 5-4
+ 57-4
+ 71-49
13. 22
8. 19
- 13.51
- 1.56
- H. 5
u. 14
- 11.28
+ 49-44
o. 40
+ 10. 16
+ 29.39
+ 23. o
14. 10
+ 24. 2
+ 65.38
- 8. 9
1 6. 24
+ 4L45
+ 27. 30
+ 14-37
- 21.45
+ 9- H
+ 74.48
+ 5 6 - 34
- 6.38
+ 2. 42
IO. 12
+ 23- 9
+ 22.49
+ 61.41
+ - 4
+ 0-04
+ 0-08
0-08
+ 0-05
+ 0-03
+ 0-05
0-05
+ '7
0-09
+ 0'O2
- 0-03
+ 0-04
+ 0-06
+ 0-06
o-oo
+ 0-13
O'OO
+ 0-05
0-04
+ O"O2
+ 0-04
+ 0-04
+ 0-07
O-O2
+ 0-04
-f- o-io
+ 0-06
O'O2
+ O'lO
+ 0-06
0-06
+ o-ii
+ 0-06
o-oo
O'OI
+ 0-04
+ 0-04
+ 0-06
- 0-13
+ 0-04
+ O'lO
0-03
+ O'OI
+ O'O2
0-08
0-04
Five Year, 1 890.
Ten Year, 1890.
Ten Year, 1890.
Ten Year, 1880.
Ten Year, 1890.
Five Year, 1890.
Five Year, 1890.
Ten Year, 1880.
Ten Year, 1890.
Five Year, 1890.
Ten Year, 1880.
Five Year, 1890.
Five Year, 1890.
Ten Year, 1890.
Ten Year, 1880.
Ten Year, 1880.
Ten Year, 1890.
Five Year, 1 890.
Ten Year, 1890.
Five Year, 1890.
Ten Year, 1890.
Ten Year, 1880.
Five Year, 1 890.
Ten Year, 1880.
Ten Year, 1880.
Five Year, 1890.
Five Year, 1890.
Ten Year, 1880.
Ten Year, 1890.
Ten Year, 1880.
Five Year, 1 890.
Ten Year, 1880.
Five Year, 1890.
Ten Year, 1890.
Ten Year, 1880.
Ten Year, 1880.
Five Year, 1890.
Ten Year, 1 890.
Ten Year, 1890.
Ten Year, 1880.
Ten Year, 1880.
Ten Year, 1880.
Ten Year, 1880.
Five Year, i8c t o.
Ten Year, 1880.
Ten Year, 1880.
Ten Year, i88c.
Ten Year, 1880.
Five Year, 1890.
e Capricorni
74. Cveni ..
d Aquarii
y Capricorni. ..
K Capricorni
e Peeasi . .
8 Capricorni
7T 2 Cveni
p. Capricorni
29 Aquarii
a Aquarii
20 Cephei
i Peeasi ..
35 Aquarii ....
Pegasi
t Ceohei...
24 Cephei
42 Aquarii
6 Aquarii
45 Aquarii
y Aouarii
50 Aquarii
3 Lacertse .
o- Aquarii
58 Aquarii
7 Lacerta!
rj Aquarii
Peeasi
n Peeasi . .
X Pegasi
r 2 Aquarii
u. Peeasi ..
t Cephei
X Aquarii
8 Aquarii
o Andromedse
B Pegasi . .
a Pegasi
<? Aquarii
5 8 Pegasi . .
ir Cephei
Bradley 3077 ...
<t> Aquarii
i/? 1 Aquarii
y Piscium
\j/ 3 Aquarii
T Pegasi
v Pegasi
4 Cassiopeia
K Piscium
CATALOGUE OF STARS.
51
Name of Star.
Ephemeris.
Magnitude.
Tabular Eight
Ascension,
iSgz'o.
Approximate
Declination.
Correction
to
Ephemeris.
Greenwich Catalogue.
70 Peeasi . .
B.J.
C'O
h m s
21. 23. 4I'?2
+ 12. IO
8
O'O3
Ten Year, 1880.
i Andromedas
C.T
4/4.
23. 32. ?O'I7
+ 42. 40
+ Q'O7
Ten Year, 1880.
L Piscium ...
CT
4/3
23 34., 24*6Q
+ ? 2
0-04
Five Year, 1890.
y Cephei
CT
3'C
23 34. sC'o6
+ 77. 2
O'lC
Five Year, 1 890.
1 9 Piscium
L.
6-0
23. 4.O. 52"3I
+ 2 - S3
0*07
Ten Year, 1880.
20 Piscium
L.
6-0
23. 42. 2V3Q
3. 22
o'o7
Ten Year, 1880.
41 H. Cephei .. .
B.J
c-6
23 4.2. 4-4*72
+ 67. 12
+ O'O2
Ten Year, 1880.
2 1 Piscium . . .
L
6-0
21 4.3. CC'SQ
+ O. 2Q
+ O'O2
Ten Year, 1880.
B.A.C 8285
L.
6-0
23. 44. 40*22
io. 35
o - o5
Ten Year, 1880.
22 Piscium
L.
6-0
23. 4.6. 26'O4_
+ 2. 2O
+ O'OI
Ten Year, 1880.
<l> Pegasi
L.
6-0
23. 46. ?Q'I;O
+ 18. 31
+ 0-03
Ten Year, 1880.
co Piscium
C.T.
4/2
23. l !3. 45'84
+ 6. 16
+ 0-03
Fire Year, 1890.
29 Piscium
L.
C'l
23. c6. 17*24
- 3. 38
+ o'O4
Ten Year, 1880.
30 Piscium
C.T.
4-6
23. C6. 2C'IQ
- 6. 37
+ O'OJ
Ten Year, 1890.
2 Ceti
C.T.
A 'A
23. c8. i2 - 3C
17 56
+ 0-07
Five Year, 1890.
3 3 Piscium
L.
TO
23. CQ. 48'3i;
6. i Q
+ 0*04
Ten Year, 1890.
XIII. CLOCK ERROR.
The Clock Error was determined from observation of the stars given in the preced-
ing section. The following table contains the times of transit of these stars and of the
circumpolar stars used to determine the Azimuth Error. Column 1 contains the star's
name ; column 2, the position of the micrometer head, whether East or West. Column
3 gives the number of wires over which the transit was observed, or, in the case of
circumpolar stars, the number of bisections made, as explained on p. 25 of the section
Paris-Greenwich Longitude 1888. Column 4 gives the reading at which the R A..
micrometer was set during the evening for observations of clock stars, and the mean
of the micrometer-readings at which bisections were made for the polar stars. Column
5 gives, in all cases, the time of transit over the middle wire set at the reading of the
R.A. micrometer adopted for the day. Column 6 gives the transit corrected for
Collimation, Level, and Azimuth Error. Column 7 contains the Tabular Apparent
R.A. of the stars taken from the ephemerides before mentioned, corrected by application
of the corrections given in the preceding section. Column S shows the difference of
columns 6 and 7, which is the Clock Error indicated by the individual stars. Column
9 is the Clock Error at the local Sidereal time shown in the heading on each day,
obtained from each star. The corresponding Clock Errors deduced from polar stars are
given in column 8, as a check on the accuracy of the reduction, but are not given in
column 9, and they are, of course, not used in determining final Clock Error.
STAR-TRANSITS OBSERVED BY MR TURNER WITH TRANSIT D,
AND
RESULTING CLOCK ERRORS
Star's Name.
Observed
Transit.
Star's Name.
Observed
Transit.
gf
.3 S.3
O CO
.&1.
1892 April 22.
Piazzi IX. 37
Piazzi IX. 37
u 2 Hydrae
t) Leonis
Regulus
34 Leouis
\ Ursae Majoris ....
Bradley 2997 S.P.
Bradley 2993 S.P.
50 Leonis
34 Sextantis
37 Sextantis
Z Leouis
$ Ursae Majoris
1892 April 23.
\ Ursae Majoris
y 1 Leonis
42 Leonis
43 Leonis
Bradley 2993 S.P.
50 Leonis
34 Sextantis
I Leonis
Ursae Majoris ....
a Ursae Majoris
X Leonis
\l> Ursse Majoris ....
{ Ursse Majoris
1892 April 26.
7' Leonis .. . | W
42 Leonis j W
43 Leonis |W
Bradley 2993 S.P ! W
Bradley 2993 S.P. . E
50 Leonis E
37 Sextantis E
I Leonis I E
Ursse Majoris E
o Ursae Majoris j K
X Leonis ! E
\fi Ursse Majoris.
I Ursae Majoris ....
Bradley 3147 S.P.
Bradley 3147 S.P.
11-830
1 1-830
11-430
7-030
11-830
1 1-830
12-230
ii '830
11-830
10797
7-230
11-830
15-730
12-580
9, 21. 34-68
9. 21. 34-50
9- 39-45-59
9. 41. 20*23
IO. 2. 30*84
10. 5.43-28
10. 10. 28-85
IO. 21. 59-87
IO. 21. 36-27
10. 33. 0-68
10. 36. 56-61
10. 40. 22-13
10. 43. 28-60
10. 55. 14-30
37'99
46*04
20-92
3' '49
43 '94
29-82
54-88
30-96
1-41
57-23
22-77
29-28
14-62
4472
44-72
52-48
27-42
37-96
50-46
36-20
1-82
37-33
7-90
37'
29-18
35-77
21-58
IO. 10.
o. 13.
o. 15.
o. 17.
O. 21.
0.32.
o. 36.
o. 43.
o. 55.
10. 56.
10. 59.
11. 3.
II. 12.
27-04
52-94
5377
13-27
31-48
58-81
54-81
26-85
11-84
5 6< 55
18-86
27-84
17-56
27-22
52-86
36-18
1-99
53*65 I 2*71
13*07 I 22-09
' 37'5 6
7*89
3*70
58-69
54-59
26-69
12*29
57-16
18-67
28*04
>7"59
21-56
6-26
2772
37-I9
26-70
10. 13. 46-00 46-01
10. 15. 46-86
10. 17. 6-28
10. 21. 25-77
10. 21. 25*97
IO. 32. 51 '90
io. 40. 13*27
IO. 43. 19*86
10.55. 5-24
io. 56. 49-89
10. 59. 11-85
11. 3. 20-82
ii. 12. 10-55
II. 27. 20-13
II. 27. 13*53
1-96
46-84 2-67
6-20 22-05
21-15
5' '93
I3 - Z3
19-85
572
50-50
11-82
2I'IO
10-70
13-67
'35
85
"4 !
73 '
'49 i
18
70
'5
66
7-73 26-81
6-29
6-73
6-44
6-50
6 '47
6-52
6-38
6-94
6-37
6-49
6-48
6-41
6-49
6-96
8-96
9''3
9-06
9-02
12-25
9-20
9-11
9-07
9-27
9-10
9-05
9-i5
9-11
'5"95
15-83
15-85
16-90
17-20
15-92
15-91
15-88
'577
15-68
15-88
16-05
15-96
13-14
19-08
Waterville.
6-69
675
6-68
6-73
6-58
6-65
6-63
6-55
6-63
o Ursae Majoris
Crateris
Ursse Majoris
5 Crateris
Bradley 3147 S.P.
Bradley 3147 S.P.
7 Ursae Majoris ....
b Virginis
IT Virginis
o Virginis
Bradley 1672
Polaris S.P
Polaris S.P.
Waterville.
9-14
9-30
9-23
9-19
9'34
9-25
9 "20
9-I5
9-24
9-19
Bradley 3147 S.P.
Bradley 3147 S.P. ..
y Ursse Majoris
35 Virginis
37 Virginis
ty Virginis
8 Virginis
2 Ursae Minoris S.P.
48 Virginis
Polaris S.P
Polaris S.P E
Waterville.
16-12
'5 '99
1 6 -06
16-04
i6'oo
15-98
16-14
16-05
Polaris S.P E
p Bobtis E
( Bootis E
/j. Virginis I E
5 Libra E
a> Virginis W
Virginia W
j3 Leonis :
$ Virginis j W
y Ursse Majoris W
2 Ursa; Minoris S.P W
48 Virginis W
e Virginis I W
& Comae W
Polaris S.P .' W| 8
11-830
13-430
15-230
11-830
11-959
9-470
14-430
16-263
11-830
12-355
ii 830
io'68o
h m s
10. 56. 58-62
11. 6. 15-70
II. 12. 19-97
ii. 13. 51-30
II. 27. 28-31
54'
- 55
59
I*
27*78
4*40
19*86
15*16
37-40
53-57
13. 18. 27*54
13. 18. 24-77
ii. 27. 25-68
ii. 27. 22-07
11. 48. 1-90
12. 42. 13-98
12.45. 59-52
12. 48. 36-60
12. 50. 2'22
12. 53. 40-29
12. 58. 12-93
13. 18. 21-75
11-830
9-480
12-401
11-830
ii. 32. 38-79
ii. 39. 28*39
ii. 43. 18*39
11.44. 49-49
11. 47. 55*05
12. 53. 32*46
12. 58. 6-08
13. 4- 6*92
13. 6. 35-72
13. 18. 5*28
18. 9-50
26. 56-15
"3
'4 .
14. 35. 44-85
'4- 37- 7'5 2
14. 40. 1-64
59 -I 5
'4"97
19-80
50-65
18-27
18-40
4-58
i9'35
14-68
36-94
10*24
4*00
59'5>
17-46
14-51
2'22
1372
59-26
36-24
1-96
34'47
I2-&2
2'53
8 I 11-480 ; 13. 18. 18-92 ! 57-9
3872
28-33
18-37
49-38
55'4'
28-01
5'94
677
3578
5'34
52-84
56-29
44-86
7-41
i"75
21-59
26*71
57-33
25-68
25-68
11-39
26-18
21 "50
43-68
13-07
4'3 6
4-36
25'93
11-38
22-74
8-28
45'45
11-09
4'74
21-73
4'59
4-59
54-54
44">7
34'27
5-27
11-34
42-16
2174
22-73
51-68
57
57
12-34
I'OO
23-44
>7'95
7-14
6-62
6-91
6-68
7-28
6-81
6-83
6-82
674
2-83
0-36
4-85
2 5'93 i 8 '47
11-42
9-16
9-02
9 '02
9-21
9-13
7-27
9'"
2 '06
6-61
15-82
15-84
15-90
15*89
'5 "93
14-15
15-80
15-96
15-90
15-36
12-86
16-05
16-14
16-03
1 6 "20
6-72
7'oo
676
6-84
6-83
6-74
8-95
8-94
9-13
9-05
9'oi
15-86
15-87
'5 '93
15-91
15-71
15-86
15-80
15-82
15-90
15-78
'5'95
April 26. 2 Ursfe Jlinoris S.P. was observed on last 4 wires with K.A. Micrometer at n r '83O.
STAR-TRANSITS OBSERVED BY MR TURNER WITH TRANSIT D., AND RESULTING CLOCK ERRORS.
OBSERVATIONS AT GREENWICH.
Off
Star's Name.
Observed
Transit.
32-:
.*-.-<
Star's Name.
Observed
Transit.
Q w
%
'SSi
<z l
1892 May 5.
8 Corvi
23 Comae
/ Virginia
X Virginia
35 Virginia
37 Virginia
e Ui'SiB Majoris
2 Ursae Minoria S.P.,
2 Ursre Minoris S.P.....
Virgiuis
/3 Comae
58 Virginia
Polaris S. P....
1892 May 6.
Bradley 3147 S.P...
v Virgiuis
Leonis
Virginia
Groombridge 1830.
y Urspe Majoris..
Virginia .
Virginia .
o Virginia ....
10 Virginia ...
11 Virginia...
Bradley 1672.
1892 May 9.
b Virginia
tr Virginia
o Virginia
10 Virginis
Bradley 1672..
Bradley 1672..
8 Corvi
q Virginia ...
23 Conine
/ Virginis
B.A.C. 4254...
x Virginis
7' Virginis
B.A.C. 4277...
1892 May 10.
Bradley 3147 S.P W
ft Leonis I E
j3 Virginis I E
Groombridgu 1830
UrsiB Majovis.
6 Virginis
ir Virginis
o Virginis
Bradley 1672 ...
Bradley 1672 ...
q Virginia
23 Comae
/Virginia
B.A.C. 4254 ....
y 1 Virginia
t Urste Majoris .
E
E
E
K
E
E
W
\v
w
\v
w
W
W
B
E
i-:
E
E io
W 1 9
1 1 "830
10-510
7-863
11-830
'3'355
h m B
12. 23. 34-10
12. 28. 45'82
12. 30. 31-15
12. 3 2. 57-88
12. 41. 39-24
12.45. 2470
12. 48. 35-11
12. 54. 4*16
54- 5-28
3. 40-08
6. 8-93
ii. 6-47
13. 17. 46-07
34-09
46-08
3 1 "20
57'93
39'34
24-80
35'97
O'lO
17-66
29-59
I4'73
41-48
22-71
8-26
19-36
43-61
0*14 43-61
39-46 2273
8-48 51-66
5-82! 48-93
29-10 9-70
1 1 -948
9-251 ii. 26. 56-10
1 1 -700 1 1. 39. 36*42
ii. 42. 51-06
| ii. 44. 22-13
ii. 46. 3-42
11.47. 2 7 "3 i
n. 53. 43-02
" 54- 38-33
1 1 -700
i3'45
ii -690
9-604
11-599
11-690
ii. 26. 49-24 44-09
45^9
36*12
50-83
21-79
3'45
27-65
42-69
38-03
59^5
26-69
50-65
24-84
11. 59. 0-45
12. 3.27-34
12. 3. 51-29
12. 14. 16*19
II. 53- 42-01
" 54- 37-41
11. 58. 59*62
12. 3. 26-41
12. 14. 21-76
12. 14. 28-27
12. 23. 33-61
12. 27. 29-42
12. 28. 45'7O
12. 30. 30-78
12. 32. 9'22
12. 32. 57-56
12. 35. 28-45
12. 37. 22-57
41-88
37-28
59H9
26*28
23-36
25-83
33'35
29-17
45'44
3"53
8-97
57-3I
28-20
22-32
2973
2973
"9'53
34-19
5-20
46-89
n'i6
26*1 1
21-43
43-61
10-37
34-I9
6*88
26*09
21*41
43'59
10-35
5-26
5-26
17*64
!;"34
29-57
14-72
53-09
4' "47
12-31
6-42
43'57
43'5i
43-53
43'55
43-37
43-46
43-39
43 - 5'
43'47
43-27
43-18
43-11
40-60
45-64
44-14
43'4i
43-36
43'4'
43-44
43-5I
43*42
43-4
43-76
43-68
43-54
42-04
44-21
44-I3
44-10
44-07
41-90
39 '43
44-29
44-17
44-13
44-19
44-12
44-16
44-11
44*10
Greenwich.
43-57
43-50
43-52
43-54
43-36
43-45
43-26
43-17
43-10
Polaris S.P
F Virginis
f Virginis
25 Canum Venaticum. ...
m Virginis
a 2 Librae
|- Libra?
l-Sootis
<!/ Bobtis
B.A.C. 4984
i 1 Libra
5 Bootis...
"'393
11*830
11*730
Greenwich.
43-41
43-36
43-41
43-44
43-42
43-40
4376
43-68
43-54
Bradley 1672 ' E
B.A.C. 4201 E
8 Corvi ' E
7 12*500
9:11 "700
9 1 '
/ Virginia i W
B.A.C. 4254 W
X Virginis |W
7 1 Virginis JW;
B.A.C. 4277 : W
e Urs-E Majoris j W '
a Canum Venaticnm ! W;
2 Ursse Minoria S.P W
Polaria S.P W
11*700
13-581
I1*2OO
Polaria S.P E 10 i 10-600
Greenwich.
44-21 i 2 Ursre Minoria S. P W
44-10
44"07
44-29
44"I7
44-13
44-19
44-12
44-16
44-11
44-10
2 Ursae Minoris S.P
48 Virginia
n Virgiuis
/3 Comae
hi Virginia
Polaris S.P
Polaris S.P | W
25 Cannin Venatioum : W
m Virginia ! W
B.A.C. 4572 | W
?) Ursse Majoria j W
10-590
8-990
11-690
12-847
"773
11-690
Greenwich.
13. 17. 38-15
13. 25. 38-82
13. 28. 29-37
13.31. 5776
13- 35- 14-63
"3' 16
'3 '47
45-
5-
57- "'48
59- 7 '83
2. 52-49
6.29-13
10. 27-73
12. 14. 2*59
12. 21. 4I*OI
12. 23. 34*86
12. 30. 31*67
12. 32. 10*04
12. 32. 58*42
12. 35. 29-27
12. 37. 23-38
12. 48. 3575
17-14
12. 50.
12.53.
3'97
13. 19. 42-08
'3- '9- 577*
12. 52. 58-92
12. 53.
12.57.
13. 3.
13. 6.
13. 12.
2-98
37-9I
38-88
7-65
2-82
13. 17. 36-47
13. 17. 24-02
13- 3'- 57"93
'3- 35- 14-06
13. 37. 34-66
13.42. 35-62
24-88
38-88
29-45
58-18
14-66
12-85
13-19
11-57
7-81
52-14
28-80
27-76
21*64
40-59
30-96
9'39
57-69
28-59
22-70
35-61
16-77
59'93
29-49
9-70
22-31
1275
41-68
57-9I
55'93
54-81
50-90
34-81
11-50
10-90
6-88
23-91
17-65
'473
S3' 10
41-48
12-32
6-43
19"35
0-42
4376
lO'IO
59-63
2-09
3778
3875
7-52
2*69
33-90
44-30
44-30
21-87
22-73
51-65
46'53
11-67
26*87 H-67
57-66 41-67
13-81 I 57-92
34'4i
18-41
44-82
43'43
43'3
43 '5
42-82
4*74
43"24
43-09
42-67
4270
43"i4
45'24
43-3*
43 ' 2 7
4377
437'
4379
4373
4373
4374
43 -6 5
43-83
40 "6 1
38-87
44-67
42-21
44-09
43-98
44'i3
43-84
3777
44-80
44-01
44-11
44-00
44'25
1 1 '660
7-560
12-960
1 1 '660
43"4>
43-28
43-48
43' 2 3
4*79
42-71
43-20
43-05
42-63
42-67
43-10
43-76
437
4378
437*
43'72
43-64
44-08
43 97
44-12
44-00
44-10
43"99
42. 49*94
50*01
34* 16
2 Urste Minoris S.P
W
IO
11-083
12. 52. 57'44
0-05
44-52
44'47
44. 20*88
46. 2*62
20-98
2-62
5 '7
46*8?
44*19
44-19
E
IO
9*i 50
12. 52. 59'4I
1*02
44-52
43-50
47. 26*98
26*90
I I 'O9
.18 Virginis
F,
9
1 1 "660
12. 57. 37-51
37*63
21 73
44-10
44*09
53. 41*74
41-84
26-08
44-24
44-24
ti Virginis
K
13. 3. 38-40
38-52
22-73
44-21
44-20
54. 37-05
37-14
21 "40
$ Comre
F,
S
13. 6. 7-41
7 '44
51-64
44-20
44-19
58. 59*31
59-40
43*58
44' 1 8
58 Virginis
F,
9
13. II. 4-67
4-81
48-93
44-12
44-11
14. 27-72
23-88
F
9
13. 12. 2-25
2-41
46-53
44-12
44-11
Polaris S.P
K
IO
I2'2IO
13. 17. 29-30
34*61
12-32
377 1
14. 3074
27. 29-00
24-34
29-05
4-64
i V 74.
40-30
Polaris S P.
W
10
I2-7IO
13. 17. 20-96
29*71
12-32
42*61
28. 45-35
45-31
29 '56
44 '25
44'2-.;
I' 1 Virginis
W
q
1 1 "660
13. 25. 38-06
38-10
22-31
44-21
44-20
30. 30-40
30-44
1471
44*27
h Virginis
W
5
13. 26. 33'80
33'85
1 8 -08
44-23
44-22
32. 8-82
8*84
53 9
44'2-r
80 Virginia
W
q
13. 29. 11-32
11-36
55"5'
44-15
44-14
35. 28-00
48. 35-28
28-03
35-o6
12-30
19-29
44-27
44-23
44-27
25 Canum Veii-iticum
W
9
"
13- 3'- 57-43
57-34
4 1 "66
44'3 2
44'3 !
May 5. The times given for the Polar stars on this day all correspond to R.A. Micrometer-reading i i r '73O.
M:iy 9. The times of transit of Bradley 1672 and 2 Ursse Minoria S.P. were observed Eye and Ear by clock Graham 2, which waa mounted in the Transit Pavilion. The difference
of clocks waa applied to these to find the timea by Sidereal Standard given above.
May io. The timea of transit of Bradley 1672 and Polaris S.P. were obaerved Eye ;md Ear by clock Graham 2. The dill'erence of clocks was applied to these to find the
times by Sidereal Standard given above.
64
TELEGRAPHIC DETERMINATION OF LONGITUDE.
Star's Name.
| Position.
No. of Wires. 1
E.A.
Micrometer.
Observed
Transit.
Corrected
Transit.
Tabular
Apparent
B.A.
Clock
Apparently
Slow.
Clock
Apparently
Slow at i2 h
Sidereal.
Star's Name.
Position.
No. of Wires. 1
R.A.
Micrometer.
Observed
Transit.
Corrected
Transit.
Tabular
Apparent
K.A.
>*
Ml >
5|I
N-fl
3 w^4
D i=.*2
p'S.vi
1892 May 11.
B.A.C. 4201.,
S Corvi
23 Comae
B.A.C. 4254.
y l Virginia...,
B.A.C. 4277.,
35 Virginia
37 Virginis
e Ursae Majoris
a Canum Venaticnm .
2 Ursae Minoris S.P. .
1 1 '670
11-670
12*310
12. 21. 39-25
12. 23. 32-81
12. 28. 44-97
12. 32. 8-47
12. 35. 27-68
12. 37. 2178
12. 41. 38'2O
12.45. *377
12.48. 35-13
12. 50. I5'96
12. 52. 57-40
39-36
3 2 "95
44 "9 5
8-54
27-76
21-86
38-26
23-84
34-86
15-85
0'62
1892 May 12.
ii Virginis E
Bradley 1672 E
Bradley 1672.
q Virginis
23 Comae
/Virginis
B.A.C. 4254..
x Virginis....
B.A.C. 4277.
37 Virginis ..
38 Virginis..
9
11-670
12. 3. 49-23
49-39
10
IO'22O
12. 14. 36*92
2 5'54
IO
11-155
12. 14. 36-54
25*16
9
1 1 '670
12. 27. 28'47
28-72
9
II
12. 28. 44-88
44-93
9
II
12. JO. 29*85
30*08
9
]
12. 32. 8-28
8-47
9
II
12. 32. 56*64
56-88
9
11-670
12. 37. 21-64
21-85
9
II
12. 45. 23*56
2374
9
j
12.46. 55*87
56*09
23-89
17-63
Z9"55
53-o8
12-30
6-41
22-69
8-24
19-27
0-38
4475
34-15
3'37
3 '37
13-32
Z9'55
14-70
5 3 '7
4' '45
6-40
8-24
40-52
44^3
44-68
44-60
44'54
44'54
44^5
44 '43
44-40
44-41
44^3
44-I3
44-76
37^3
38-21
44-60
44-62
44-62
44 "60
44'57
44-55
44-50
44-43
1892 Aug. 17.
Greenwich.
44-53
44-68
44*60
44'54
44-54
44-55
44-42
2 Ursie Minoris S.P
48 Virginis
P Comes
58 Virginis
61 Virginis
Polaris S.P. ..
Polaris S.P
25 Canum Venaticum
m Virginis
B.A.C. 4572
86 Virginis
17 Ursae Majoris
Greenwich.
44-76
44-60
44-62
44-62
44-60
44-57
44-55
44-49'
44-42
Polaris S.P. ,
Montreal.
6 Aquilffi
W
g
11*660
20. 4. 38 'O2
42*78
63-6-;
At iS"
Sidereal.
Bradley 270 1
w
IO
io*6c,q
a Cvtmi...
W
4
1 1 '660
1892 Aug. 18.
i Aquilse
"W
9
1 1 '660
18. 28. 16*45
60*89
Mont
a Lyrse
w
f
l8 ?2. 17*4.8
l8'!7
18*86
60-68
2 A<]iii!;i-
w
"
18 35 18*28
29 Sagittai ii
w
Q
* '
1 8*06
Cephei 51 S.P
w
IO
"
41 "28
v Lvrse ...
w
e
56'28
6o"8i
w Aquilae
F,
Q
1 1 *66o
p 1 Sao'ittarii
F
b Aquilse
F,
9
F,
20
8-77-1
47*08
co'88
A Ursse Minoris
"W
50*82
ft Sagittse
w
e
13*66
6o'i8
6 '6
Groombridge 1119 S.P. ....
1892 Aug. 20.
w
F,
10
13-598
19. 43. 40-85
18 28 33*58
38*01
28*07
46-84
58-83
Mont
C-! 'Q8
F,
18 32 26*38
i8'8?
2 Aquilse
F,
4'
18. -ic. ic'66
53 9
C-3'82
53 97
E
Q
2*87
Cephei 51 S.P
F,
14
1 3*8-5 5
18. 50. 22*04
48 'A7
W
IO
10*790
"W
g
1 1 "660
12*84
y Aquilae
W
9
C-3'84.
5 Sac'ittae
w
o
IQ. 41. 47*6c
^6'-t6
ci'8-j
w
g
ci 'Ra.
Groombridge 1119 S.P
w
IO
11*170
19. 48. 13*66
5374
48*85
55*11
f Aquarii
15 Delphini.
S Aijuilse
a 1 Capricorni.
a 2 Capricorni.
a Capricorni .,
B.A.C. 7014.
i Delphini....
Bradley 2701.
75 Draconis ..
a Cygni
e Cygni
15 Delphini ..
f Ursse Majoris
S Virginis
a Canum Venaticum
2 Ursse Minoris S.P
2 Ursse Minoris S.P. .
48 Virginis
e Virginis
Comae
Polaris S.P
Groombridge 1119 S.P
ft Aquilae
a 1 Capricorni
a 1 Capricorni
f)~ Capricorni
B.A.C. 7014
69 Aquiise
e Delphi-)!
Bradley 2701.
75 Draconis ..
e Cygni ......
15 Delphini ..
ju Aquarii
14*237
11*670
10*920
11*670
9 ] 11*670
4
S
'"574
'4 '447
11*670
10*188
12-088
W
Wi
1 1 -660
8-732
n*66o
11*660
9 j 1 1 *66o
9
6
6
ii '660
10-492
ii -660
12. 52. 55-86
12. 58. 37*19
13. 6. 7*11
13. ii. 4-38
13. 12. 1*88
13. 17. 18-85
13* '7- 19'39
13. 31, 57*26
'3- 35- '3"44
'3- 37- 33-99
13. 39. 27*87
13. 42. 35*06
12. 48. 34*98
12. 49. 26-39
12. 50. 15*83
12. 52. 57-07
12. 52. 55*87
12. 57. 36-96
'3* 3-37-94
13. 6. 7-00
13. 17. 17*38
'3- '7- '9"55
20.40. 43*94
20. 43. 24-63
19.44. 9*81
10. 4. 42*27
20. 10. 37-54
20. ii. 1*54
20. I3.54'27
20. 16. 48-44
2O. 22. 58-63
2O. 27. 2-31
20. 33. 4-40
2O. 34. 26'2I
2O. 40. 51-38
2O. 43. 28-18
20. 45. 47-78
59-08
37-28
7-07
4-50
2-0 3
29-64
30-18
57"l6
'3'55
34*09
28*00
34*86
34*66
26*57
1574
1*94
0*74
37*18
38-17
7 "02
35*69
49'43
28-27
1-66
46-50
42-66
6-66
59-38
52-22
3 '02
5-65
4"39
3' 2 5
52-63
3 I- 34
5 2 '53
20- 4- 5377 i 52"93
20. 10. 49*84 48-92
20. ii. 13-87
2O. 12. 2O-I5
20. 16. 59-37
20. 27. 12-98
2O. 32. 46-84
2O. 34. 8*98
20. 36. 53*98
20.40. 59-52
20.43. S 8 ^
12-95
I9*I7
58-58
12-32
48-92
11*05
53" 6 7
59-06
3779
4475
21-72
51-64
48-93
46-53
13*02
13-02
41*66
57 '92
18*41
12*31
>9'57
19-26
1 1 '06
0-37
44'99
44'99
21-72
22-72
51*63
'3'73
'373
5 2 '45
31-38
46-84
46-43
42-39
6-46
59-34
52"5
2-82
5'59
42-49
4-58
52-82
31*38
52-40
46-42
42-38
6-46
12-48
52*04
5*58
4*'33
4-42
47-27
52-81
31*37
S
45-67
44 '44
44-57
44'43
44*50
42-84
44-50
44'37
44'3 2
44'3'
44-7I
44-60
44 '49
44-63
43-05
44-54
44-55
44-61
40-21
38-04
63-02
63-11
45-18
59^3
59-73
59-80
59-96
59-83
59-80
59'94
6i'io
61*33
60*19
60*04
53'49
53-46
53'5-
53-3 1
53*26
53-60
5375
May 1 1, 12. The times of transit of Polaris S.P. were observed Eye and Ear by clock Graham 2 which hung in the Transit Pavilion.
to these to find the times by the Sidereal Standard given above.
1892 Aug. 20. The instrument was adjusted in Azimuth between the observations of Cephei 51 S.P. and x Urs-E Minoris.
The difference of clocks was applied
STAR-TRANSITS OBSERVED BY MR TURNER WITH TRANSIT D., AND RESULTING CLOCK ERRORS.
OBSERVATIONS AT MONTREAL.
55
Star's Name.
Observed
Transit.
3-8
it*
Star's Name.
S
. v
"S
Observed
Transit.
gls
o *- o
1892 Aug. 22.
B.A.C. 6060
67 Ophiuchi
96 Herculis
p l Ophiuchi
8 Ursa; Minoris .
S Ursse Minoris .
i) Serpeutis
21 Sagittarii
1 Aquilae
ct Lyra
2 Aquilae
29 Sagittarii ....
jS 1 Lyras
Cephei 518.?..
Cephei 518.?. .
i Aquilae
1892 Aug. 23.
TJ Serpentis ..
21 Sagittarii.
1 Aquilse
o Ly rse
2 Aquilse
1892 Aug. 26.
o 1 Capricorui.
a 2 Capricorni.
/3- Capricorni.
1892 Aug. 28.
1 Aquilse
a Lyrse
2 Aquilse
29 Sagittarii ...
/3 1 Lyrae
Cephei 51 S.I'.
Cephei 51 S.P. .
o Sagittarii
f Aquilaj
ic Sagittarii
d Sagittarii
a) Aquilse
u Sagittarii
1892 Aug. 29.
o 1 Capricorui..
a 2 Capricorni . .
a Capricorni ..
(P Capricorni..
f Capricorui. . .
69 Aquilse
e Delphini
Bradley 2701..
Bradley 2701..
o Cygni
t Aquarii
1892 Aug. 30.
96 Herculis
p* Ophiuchi '.
8 Ursa? Miuoris...
S Ursa; Minoris..
TJ Serpentis
11-540
12-982
17. 48. 50-29 48-23
17. 54. 29-97
'7-57- I- 53
17. 59. 15*78
18. 6. n'73
13-475 18. 6. 11*80
28-26
0*05
14-06
23-05
2475
n'66o 18. 14. 58-49 57*2
,, 18. 18. 10*94 9*47
18. 28. 35*32 34-03
,, j 18. 32. 31-34 30-82
> -8. 35. 37*25 35*95
18. 42. 31-59 30-13
,, 18. 45. 20*23 19*60
13-368 i 18. 49. 12-53 54-I4
W 10 11*818 18. 49. 11-72 j 55-33
W 9 11-660 18. 53. 58*66 j 57*62
*66o
1 1 '660
1 1 "660
9-000
ii *66o
1 1 "660
9-122
8-437
11*660
1 1 -660
12-604
14*430
1 1 *66o
18.15. 1-83
18. 18. 14-22
18. 28. 38-71
18. 32. 34-59
18. 35. 40-64
20. n. 9 "2 1
20. II. 33-17
20. 14. 26*19
18.28.55*57
18. 32. 51-47
'8. 35- 57H9
18. 42. 51-92
18. 45. 40*42
18.49. 3 2 '49'
18. 49. 39*77
18. 57. 49-27
19. o. 2-32
19. 2.57*16
19. 10. 55-58
19. 12. 20*44
19. 15. 9-13
2O. I I. 19*44
2O. II. 43-32
2O. 12. 49-66
2O. 14. 36-50
2O. 22. 22*O I
20- 23. 3978
20. 27. 42-27
20. 33- 13-38
20. 33- I3'55
20. 37- 23*31
20. 41. 29'82
17. 57. 27-67
17. 59. 42*09
18. 6. 31-93
18. 6. 32*83
18. 15. 25-50
0-65
12-80
37-46
33'94
8-19
32-14
25*15
54 'o
50-75
55'9-
50-14
39-57
13*63
18-91
I '21
36-03
16*09
47-81
,-8 7
11*65
11*65
45'33
57-40
21*97
18*79
23-88
18-02
7'39
43-10
43*10
45'3'
21*96
1877
23-87
42-36
6-43
21 '91
18-68
23-82
17-96
7-30
45'49
'5-23
28-Sl
22-99
53-93 j 21-48
19*28 46-94
35-05
17-96
41-84
48-08
34^9
20-45
38-45
41-16
17-92
17*46
22*79
28*30
26-68
40*80
45-11
47-64
24-21
42*35
6-42
12*45
59-31
44*83
2-86
5'55
41-66
41-66
47*18
52*44
47-69
176
8*66
8*66
45*24
4776
47-81-
48-60
46-90
48-05
47'93
47'94
47-97
47-93
47-89
47'79
48*96
4777
47'69
44-67
44-60
44-5
44-83
44-49
34'i7
34'29
34-I7
27-91
27-93
27-91
27-82
2773
31-80
26-58
27-66
27-60
27-52
27-55
27-66
27-52
24-39
24-58
24-37
24-32
24-38
24*41
24-39
2374
24-20
24-39
24-14
21 "O I
20-96
21'02
2I-03
Montreal.
4777
47*82
4776
47-81
47'97
48-00
48*04
48*00
47-98
47-88
47-80
o Sagittarii
f Aquilse
IT Sagittarii
d Sagittarii
u Aquilse
v Sagittarii
b Aquilae
a 1 Cygni
A Ursfe Miuoris .
\ Ursse Minoris
6 Sagittaa
/Sagittarii
7 Aquilse
S Sagittae
a Aquilae
r; Aquilse
Groombridge 1119 S.P
Montreal.
4470
44-64
44-56
44-90
44-57
Cephd 51 S.P. ,
t Aquilse
( Aquilas
IT Sagittarii
d Sagittarii
co Aquilse
Montreal.
134-46
34-58
34-47
y Cygni
75 Dracouis .
t Cygii
Montreal.
27-97
27-99
27-99
27*92
27*83
27-80
2774
27-66
2771
27*82
27-69
A Aquilse
0'Cyg.ii
\ Urs;e Minoris.
Montreal.
24-69
24-88
24-67
24-63
2471
24-74
2473
2475
24*51
15 Delphini...
32 Vulpeculse..
20 Capricorni..
21 Capricorni .
7 Equulei
a Equulei
30 Capricorni
" Cygni
Groombridge 3548...
Groombridge 3548..
Montreal.
2 I '00
20*96
21-07
A Ursse Minoris
6 Sagittae
'Sagittarii
y Aquilae
8 Sagittae
a Aquihe
i) Aquilae
Groombridge 1119 S.P
Groombridge 1119 S.P
21 Sagittarii
Groombridge 1119 S.P
9 Aquilse
o 1 C.ipricorni
a 2 Capricorni
a Capricorni
E 10
E 9
E 9
E 9
E 9
E 4
- 66o
12-394
11705
n'66o
11-219
12-640
1 1 -660
n'66o
9'537
1 1 -660
1 1 '660
ii
11-320
10-760
1 1 -660
12-860
10 10-165
1 1 -660
11-763
1 1 -660
10-372
10-107
1 1 "660
9-027
1 1 '660
18. 57. 29-37
18. 59. 42-24
19. 2. 36-99
to. 35-57
12. 0-45
'4- 48 - 95
4-94
37-26
8-87
19.
I 9 .
'9-
19. 19.
19.25.
19. 30
19. 30. 7-74
19. 35. 27-29
19. 39. 20-30
19. 40. 23-10
19.41.4975
19. 44. 46-46
19.46. 14-15
19. 48. 44*82
18. 49. 14*42
18.54. 1-49
18. 59.45-09
19. 2. 39-79
19. 10. 38-26
19.12. 3-39
20. 17.49-65
2O. 34. 28-48
20. 41. iyii
-9. 19. 24-94
'9- 25. 57 - '5
19. 30. 12-57
19, 30. 23 *io
'9- 35- 47'6S
19. 39. 40*65
19. 40. 43-47
19. 42. IO'O2
19. 45. 6-89
19. 46. 34*64
19. 49. 21*66
19. 49. 20*94
20. 44. 8-34
20. 49. 36-30
20. 53. 8-44
20. 54. 27-52
21. 4.45-IO
21. IO. 4*98
21. II. 34'2I
21. 12. 48*91
21. 20. 35-43
21. 20. 37-42
18. 18. 38-00
19. 49. 23-49
20. 5. 26-33
20. II. 22'43
2O. 1 1. 46*40
2O. 12. 52-72
27-78
4I-I7
35'4'
34-02
59'35
47-46
P5
36-41
48-97
53-26
26-38
18-85
22-08
48-85
45 '4'
12-99
58-81
0-62
44-19
38-48
36-97
2-47
49'5
29-84
18-44
2379
56-30
4-18
9-29
46-50
38-88
42*21
8-88
5-60
33-22
3372
2770
7-16
35-38
675
25-86
43'55
377
32-65
48-36
49'57
49-91
36-42
30-25
25-07
20-98
44^5
51-17
15-28
28-87
23-04
21-53
46-99
35 '9
51-46
24-09
4277
4277
14-01
6-43
9'77
3 6 '54
33'-5
0-62
5'75
43-5
45-30
28-86
23-04
21-52
46-99
23-29
3 '97
51-41
24-02
37 '23
37-23
13-96
6-40
973
36-49
33-11
0-58
5579
5579
3''35
5975
377
49'93
779
28-02
56-83
1277
15-21
15-21
57'3'
57-81
46'35
42-34
6-41
12-44
47-5
47-70
47-63
47 '5 1
47-64
47-63
47-61
47-68
49'5'
47-63
47-58
47-69
47-69
4774
47-63
52-90
44-69
44-68
44-67
44-56
44 '5 5
44-52
34'24
34'53
34'35
27-62
27-72
33'5
27'94
27-46
27-52
27-52
27-61
27-51
27-36
22-07
28-09
24-19
24 '37
24-02
24-07
24-24
24-25
24-18
24-41
25-64
25-28
20-89
27-56
21-28
21-36
21-46
21-27
-3-
IN
5a*S
5*- 33
*
47-62
47-83
47-76
47-66
4779
47-79
47-78
47-86
4779
47-90
47-90
47-96
44-80
44*80
44*70
447'
44-68
34'54
347'
27*80
27-92
27-68
27-75
27-75
27-84
2775
27*60
2476
24*41
24-46
24*66
24-68
24-62
24-85
20-93
21-66
2176
21-58
Aug. 22. The R.A. Micrometer for first group of stars was inadvertently left at i i r '540. The times in column 5 correspond to this.
The time of transit over centre wire given for S Ursa; Minoris corresponds to 1 1 '660.
66
TELEGRAPHIC DETERMINATION OF LONGITUDE.
Star's Name.
Observed
Transit.
SB
SH
III
5 0.8
ll!l
will
3-s 50
Star's Name.
Observed
Transit.
Ir
1892 Aug. 30 continued.
Montreal.
j8 2 Capricorni.
B.A.C. 7014..
7 Cygni
Bradley 2701.
o Cygni
1892 Sept. 3.
d Sagittarii
0' Cygni
A Ursae Minoris.
1892 Sept. 4.
o Lyrse
2 Aquilas
/3 1 Lyrae
Cephei 51 S.P...
<o Aquilse
b Aquilae
P Cygni
X Ursae Minoris.
A Ursae Minoris.
/Sagittarii
S Sagittse
a Aquilae
1892 Sept. 7.
7 Draconis E
67 Ophiuchi E
96 Herculis E
j Serpentis E
21 Sagittarii E
o Lyrse W
2 Aquilae W
29 Sagittarii W
/3 1 Lyra? W
Cephei 51 S.P W
o Sagittarii W
CAquilee W
IT Sagittarii W
1892 Se'pt. 8.
11*660
10*975
11*660
1 1 *66o
9'939
ii "660
12*879
n'66o
11*680
10-423
n '660
1 1 "660
1 1 "660
12-900
1 1 -660
96 Herculis
p l Ophiuchi
8 Ursse Minoris
TJ Serpentis
21 Sagittarii
1 Aquilae
o Lyrae
2 Aquilse
W| 9,11-660
W 9
Cephei 51 S.P
A Ursse Minoris
/Sagittarii
7 Aquilse
S Sagittae
a Aquilse
7j Aquilae
Groombridge 1119 S.P
Groombridge 1119 S.P. ..
a 2 Capricorni
a Capricorni
y8 2 Capricorni
69 Aquilae
( Delphini
30
I0 '535
ii '660
20. 14. 39-46
2O. 17. 31-89
20. 18. 2-32
20. 33. 16-98 21*13
20 37. 26*63 I 26*18
3073
1-85
10-977
12-811
1 1 '660
11-454
'3-499
1 1 "660
19. io. 35-23
19. 25. 35*60
19. 28. 32*46
18. 32. 28-40
l8 - 35- 35'93
18. 45. 17*02
18.49. So'S 1
19. ii. 57-97
19. 19. 2*29
'9- 25. 33'99
19. 28. 24-45
19. 28. 23-43
19. 39. iS-Si
19. 41. 46-98
19. 44. 44*13
17.53. "-44
17. 54- 21-25
17. 56. 5274
18. 14. 50*60
18. 18. 2-96
18. 32. 23*07
18. 35. 29*20
18. 42. 23-61
18. 45. 12*01
1 8. 49. 13-20
18. 57. 20*76
18. 59. 33*81
19. 2.28*47
17. 56. 51*16
'7- 59- 5 '43
18. 5.54-32
18. 14. 49-03
18. 18. 1*41
18. 28. 25-81
18. 32. 21-48
18. 35.2770
18. 49. 1175
19. 29. 40-44
19. 39. IO"20
19. 40. 13-07
19. 41. 39-63
19. 44. 36-39
19.46. 4-13
19. 48. 5273
19. 48. 57-11
20. II. 10*14
20. 12. 16-35
2O. 14. 3-08
2O. 23. 6^48
20.27. 8*79
32-68
35*12
42*46
28-39
33-58
16-66
58-29
56-50
0-84
33*31
35*88
'S'94
4579
42*51
12-15
20*91
52-69
50-18
2-25
23-34
28-65
22-88
I2'l6
55-65
2O 'O I
33-61
27-72
51-20
5-20
r 57
4872
0*83
25-42
21-86
27*30
54-50
26-45
9-66
12-98
39-66
36-28
3-90
7-26
13-28
9-68
"579
2'59
6-16
8-68
59-30
52'oo
23-24
4I-57
47-I7
21*41
23-93
30*12
18-52
2373
7-17
48-99
46-85
51-32
23-92
28-90
28-90
6'34
36-41
33-04
7-03
15-86
47-55
45-12
57'"9
18-46
23-68
17-82
7-11
50-39
15-10
28-67
22-87
47-53
1-63
4*96
45*11
57*18
2176
18*43
23-67
50-84
24-38
6-29
9-61 i
36-36
33-00
0-48 .
779
779
6-34
12*37
59-23
279
5-48
21-32
21-27
21-39
20*44
20*99
4873
48-81
47-66
50-13
5-'5
50-51
50-70
50-35
50-48
50-61
50-33
53*02
5o'4o
50-62
50-53
54-88
54^5
54-86
54'94
54'94
55-12
55-03
54-94
54-95
54"74
55-09
55-06
55-I5
56-43
57-39
56-39
56-35
56-34
56*57
56-37
56-34
S7-93
56*63
56-63
56*70
5672
56-58
60*53
54'5>
56-66
56-58
56*64
56*63
56*80
s
6?
3 Aquarii
'59
p. Aquarii
71
19 Capricorni
32 Vulpeculse .. .
1 6 Delphini
*tl
20 Capricorni . .
w
w
W| 9
W! 9
Canso.
48-65
4871
A Urs;e Minoris.
o- Aquilse
y Aquilse
W
Canso.
50-09
50-11
50-46
50-27
50-39
50-29
50-50
50-41
Gruombridge 1119 S. P j E
6 Aquilse E
u 1 Capricorni E
o" Capricorni E
a Capricorni..
3 2 Capricorni.
B.A.C. 7014..
Canso.
54-96
54-86
54-92
54 - 99
54-90
54'9
55-03
55-00
55-08
Canso.
56*38
56-33
56-31
56-54
56-33
56 60
56-62
56 '47
56-53
56-45
56-51
56-49
5^65
a Cygni.
e Cygni..
15 Delphini
p. Aquarii
19 Capricorni
32 Vulpeculie
16 Delphini
20 Capricorni ......
2 1 Capricorni
7j Capricorni
ti Capricorni
61- Cvgni
6i 2 Cygni
7 Equulei
(.' Cygni
Groombridge 3548.,
Groombiidge 3548.
Aquarii
3 Cephei
r Capricorni.
d Aquarii
K Capricorni
a Aquilse
/3 Sagittse
/ Sagittarii
7 Aquilse
a Aquilse
Groombridge 11198.!'
Groombridge 1119 S.P
e Aquilffi
a 1 Capricorni
a'- Capricorni
e Cygni
ft. Aquarii
1 1 -660
Bradley 2701 W 8
a Cygni W| 9
3 Aquarii W! 9
15 Delphini W 4
W 9
W 9
20. 41. 33-16
20. 46. 33 '18
31-67
3170
20. 48. 25-59! 23-95
20.49. 3977 i 38-91
20. 50. iz"o8 10-95
20. 53. 11-82 10*16
9-420
ii -660
7-782
1 1 "660
9-299
1 1 -660
19. 28. 32-04
19.33. 6-85
19. 40. 22-30
19.48. 55-46
20. 4. 56-40
20. 10. 52-50
2O. II. 16-52
2O. 12. 22'59
2O. 14. 9*40
2O. 17. I '89
20. 32. 45-95
20. 36. 56-08
2O. 41. 14-87
2O. 43. 41*11
I 9 . 32. 59-08
>9- 35- i8'79
19. 39. 11-92
19. 40. 14-55
9- 44- 37"97
19.48. 55-24
19. 49. 0-95
20. 4.5I-49
29. io. 47-62
2O. II. 11-62
20. 40. 57'oi
20-45- 57 '54
n'66o I 20. 36.14971
20.40.55-56
1 1 -660 20. 43. 34-64
| 2O. 45. 56 03
,, j 2O. 47. 48*36
2O. 49. 2*63
20. 49- 35"'
20. 52. 34'66
20. 53- 53-70
20. 57. 22 "24
20- 58. 59-19
21. i. 8 -49
21. I. IO-O9
21. 4. II*I3
21. 7. 25'53
21. 2O. 3*29
I I '660
13 11-630
10-537
1 1 '660
I0 '333
9-607
1 1 -660
21. 20. 3*49
21. 24. 58-67
21. 26. 19-78
21. 30. 8-93
21. 33. 10-59
21. 35. 44*45
21. 37. 5876
4'37
5"3'
20*08
n-86
55'99
5 ' '93
1 5 '94
21-92
8-80
i'57
50*40
56-44
i4"37
40-86
5875
18-65
I I *2O
14-30
37-69
9-20
13-27
51-09
47-04
11-04
57-21
57-02
5^43
52-40
44-48
5972
3 '75
30-77
30-12
53-98
9*67
3'58
46-33
42-30
6-37
12-40
59-26
51-96
41-06
47-10
4-88
31-32
5 3 '94
13-85
6-31
9-63
33-01
678
6-78
46-31
42-28
6-35
52*68
52*36
50*26 , 47-05
55-83 i 52*66
34-58 ! 3'"*9
55-65 ' 52-35
47*85 44 '44
2*82 <;Q'6.:
35-04
34-I3
53' 2
21*69
58-69
8-90
10-50
11-03
25-76
16-98
56-68
58-31
21-74
8-36
10-34
43-89
58-63
3170
30'74
49-90
18-38
55H3
576
7'3'
776
22*65
13-21
13-21
55-09
18-56
4*98
7-06
40^62
55-37
20-76
2070
20-53
20*8 1
2o'8o
2O'6l
49-75
48-67
48-69
5172
50-34
50-37
50-43
50-48
50-46
5'39
50-66
50-66
50-51
50-46
55-I9
55-20
55-11
53'5>
55-22
55-24
55-3I
55H7
55-34
56-79
56-83
56-71
56-70
56-59
56-83
56-66
56-61
56-70
56-69
56-74
56-86
56-81
56-73
56-89
56-23
56-53
5678
56-82
56-62
56-72
56-73
56-74
21-13
21-08
20-92
21 "2O
21 "19
2 I "01
STAR-TRANSITS OBSERVED BY MR TURNER WITH TRANSIT D., AND RESULTING CLOCK ERRORS.
OBSERVATIONS AT CANSO.
57
Star's Name.
.1
Observed
Transit.
f|H
*
g S b
BBS
Star's Name.
Observed
Transit.
I8B
5 f-*
3-
1892 Sept, 9.
Canso.
S Ursa; Minoris .
7) Serpentis
2 1 Sagittarii
1 Aquilae
a Lyrae
2 Aquilse
29 Sagittarii
Lyre .
E
E
E
E
Cepl'ii-i 51 S.P | E
Cephei 51 S. P...,
f Aquilie
T Sagittarii
d Sagittarii
a AqlliliE
A Ursai Minoris..
a AquiliE
7) Aquilos
11*078 18. 5. 51-66
n"66o i 18. 14. 4772
,, j 18. 18. 0-08
18.28.24-44
18.32.19-99
i 18. 35. 26-25
j 18. 42. 20-75
,, I 18. 45. 8-99
12-572! 18. 49. 11-55
I4-934
1 1 -660
9-962
ii "660
1 8. 49. 11-70
18.59.30-85
19. 2.25-72
19. 10. 24*21
19. ii. 49*01
19. 29. 34-63
19. 44. 35-22
19. 46. 2*91
6-58
47'24
59-30
23-87
20-29
25-67
19-98
9"'5
52-46
30-61
24-91
23 '43
4873
23-25
34-90
2*46
4-56
45-09
57-16
21-74
18-41
23-65
'779
7-07
51-30
51-30
28-64
22-84
21-34
46-78
23"27
32-99
0-46
57^5
57-86
57-87
58-12
58-84
58-07
58-03
57^3
57'9'
58-05
O"02
58-09
58-00
58-09
57-88
57-97
57-99
57-90
Groombridge 1119 S.P
Groombridge 1119 S.P
a 1 Capricorni
a? Capricorn!
IT Capricorni
2 Capricorni
y Cygni
p Capricorni
69 Aquilse
32 Vnlpeculse ..
16 Delphini
ri Capricorni ..
9 Ciipricoriii ..
61- Cygni
6i 2 Cvgni
27 Capricorni .
10 11-461
10 10-932
9 | 1 1 "660
5
9
9
9
9
9
b ii
19. 49.
o"o6
19. 48. 59-97
20. 10. 44*71
20. n. 8-70
20. 12. I4'97
2O. 14. I '69
2O. 17. 24-56
2O. 21. 47-31
2O. 23. 5"O8
1 1 -660 20. 49. 1-41
20. 49. 3 3 "86
20. 57. 21 "10
20. 58. 57-99
21. I. 7-33
21. I. 8-95
i 21. 2. 28'12
B . S
n-68 : 8-82
9-95
44-07
8-06
14-22
I "01
24-89
46-58
4 "60
'"43
33-60
20*30
57-24
7'57
9-19
27-31
: 8-82
: 42-26
1 12-36
59*22
23*10
4475
278
59-64
31-69
18-37
55H2
575
7'3
57-I4
58-87
58-'9
58-27
58-14
58-21
58-2,
58-17
58-18
58-21
58-09
58-07
58-18
58-18
58-11
58-13
58-06
58-14
58-01
58-08
58-08
58-03
58-04
58-05
57-93
57-9
58-01
58-00
57-93
57-95
1892 Sept. 10.
5 Ursse Minoris.
77 Serpentis
a Lyrte
2 Aquilte
29 Sagrttarii
14-267
ii "660
18. 5.53-21
18. 14. 46-40
18. 32. 18-90
18. 35. 25-01
18. 42. 19-33
5'77
45 "9 '
19-06
24-43
18-59
4-I5
45-o8
18-38
23-64
17-78
58-38
59-I7
59-32
59-21
59-19
59-16
59-29
59-18
59"'5
Canso.
Cephei 51 S. P.
Cephei 51 S.P. .
P Cygni
A Urste Minoris
13-097
13-288
1 1 "660
11-149
18. 49. 8*64
18.49. 8-15
19. 25. 24-47
19. 29. 39-04
52-36
24-38
19-92
5179
5'79
23-82
22-12
59-43
59-30
59'44
62-20
59-36
1892 Sept. 11.
v Ophiuchi ....
y Draeonis
6- Ophiuchi...
96 Herculis ...
p l Ophiuchi ...
n'66o 17. 52. 6-74
17.53. 5'8o
'7- 54- i5'79
17. 56. 47-15
17.59. ''55
6-05
6-25
15-28
46-91
1-04
6-62
6-88
I5'79
47-48
1-58
60-57
60*63
60-51
60-57
60-54
Canso.
60*58 8 Ursse Minoris.
60-52
60-57
60-54
8 Urs;e Minoris.
77 Serpentis
21 Sagittarii ....
W 10 12-015 '8. 5- 5 -73 3'37 372 60*35
13-671
11-660
18. 5. 49*85
18. 14. 45*07
18. 17. 57-39
3-00
44'5-
56-56
372
45-06
57-13
60*72
60-55
60-57
60-54
60-56
1892 Sept. 12.
Canso.
v Ophiuchi
y Draeonis
67 Ophiuchi
96 Hurculis
p l Ophiuchi
S Urste Minoris.
8 Ursse Minoris.
Cephei 51 S.P. .
n'66o 17. 52. 5-63
'7- 53- 4-38
'7- 54- 14-53
17. 56.45-95
17. 59. 0*29
12*948 18. 5. 47-21
12-630 | 18. 5. 46-32
11782 i 18. 49. 12*83
4'97
5-04
14-08
45-81
59-83
2'I I
'73
53'07
6-60
6-84
I5-77
47-46
1-56
3-27
52-82
61-63
61-80
61-69
61-65
61*73
61-16
61-54
5975
61*64
61 '70
61-65
61*73
y Ly fre
b Aquilffi
l Cygni
A Ursa? Minoris
a AquiliB
A Ursa; Minoris...,
1 1 "660
II'IOO
1 1 *66o
10*039
18. 53. 53-67] 53-80
19. 18. 49*49 < 49 "21
19. 25. 21*62 \ 21*64
19. 29. 26-50
'9- 3- 5'74
19.32. 52-11
19. 29. 29-05
18*49
5"'5
5172
'9"37
19-62
62-05
62-01
62-15
61*13
62*01
62-15
60-25
62 "oo
61-94
62*08
61-93
62*07
1892 Sept. 13.
Canso.
Cephei 51 S.P. ..
y Lyrae
f Aqnila
TT Saj-ittarii
v Sagittarii
b AqiiiLt
/8 1 Cygni
A Ursse Minoris.
A UrsiB Minoris
K Aquilse
a AquiUe ..
Groombridge 1 1 1 9 S. P
Aquilse
1 Capricorni
of Capricorni
a Capricorni
j3 2 Capricorni
f Capriconii
69 Aquila;
12-822
1 1 "660
12-159
12-305
1 1 "660
9 '8 57
11*660
18. 49. 10*22
18. 53. 52*96
18. 59. 26-14
19. 2. 20-98
19. 14. 32*95
19. 18. 48-66
19. 25. 20-87
19. 29. 21*27
19. 29.
19. 30.
19. 32.
19.48.
20. 4
20. 10.
20. ii.
20. 12.
2O. 13.
2O. 17.
2O. 21.
2O. 23.
21*73
4'94
51-46
40-08
4-07
10-25
56-99
19-68
42-55
0-31
50*63
20-03
32-09
48-28
2079
12-52
14-65
4-27
51*00
3'54
43-27
39'3'
3-30
9'37
56*18
19*93
41*69
597
28-58
22-78
34-73
51-20
2377
18-27
18-27
7-i5
53-86
13*50
46*24
42*22
6*29
12*32
59''9
23-03
447'
274
6275
62-84
6279
6275
62*64
62-92
62*98
63-62
62*88
62*86
69-96
62-97
62*91
62-99
62-95
63-01
63-10
63-02
63-04
62-80
62*74
62-70
62*58
62*86
62-91
62-81
6279
62-87
62*81
62-89
62-84
62-90
62-99
62-91
62-93
e Delphini
Bradley 2701
a Cygni
e Cygui
15 Delphini
/i Aquarii
19 Capricorni
32 Vulpeculse
16 Delphiui
20 Capricorni
21 Capricorni
61 1 Cygni
6i' 2 Cygni
27 Capricorni
y Equulei
CCygni
a Equulei
30 Capricorni
<r Cygni
a Cephei
Groombridge 3548.
y
10
9
9
9
9
9
9
4
5
9
9
9
9
9
9
9
9J
8 !
9
10
11*660
9-440
ii "660
1 1 "660
10-778
20. 27.
2O. 32.
20. 36.
2O. 40.
20. 43-
20. 45.
20. 47.
2O. 48.
20. 49.
2O. 52.
20. 53-
2-82
3'"39
43H3
49-29
28-59
49-98
42-36
56-50
29-05
28-53
47-66
1. 2"2O
' 3'79
2. 23-04
4- 4'99
7. 19-38
9.25-22
21. 10. 54-34
21. 12. 9-08
21. 14. 57"86
21. I 9 . 53-42
2-42
3 6 74
4379
49'34
28-22
49^4
41-46
56-42
28-68
27-62
2-4O
3 '99
22'12
4-60
I9-38
2475
53-47
9-30
59*1-2
8-95
40-15
46*96
52*60
31-25
52-31
44-40
59-59
31-66
30-70
49*86
57
7-25
25*42
, 772
22-61
; 27 "96
5678
12-63
i 2-29
i 12-18
63 "01
63-41
63-17
63*26
63*03
63-07
62-94
63-17
62*98
63*08
63*09
63-30
63-26
63-30
63-12
63-23
63-21
63-31
63-33
63-17
63-23
62-89
63-04
6 3''3
62-90
62-94
62-81
63-03
62-84
62-94
62-95
63-16
63-12
63-15
62-97
63-08
63-06
63-16
63-18
1892 Sept. 14.
$ Draeonis
o Ophiuchi
5 Ursa; Minoris.
11*660
[3*225
17. 26. 55-85
17. 28. 53*16
18. 5.44-15
56-38
5274
58-58
0-27
56-63
63-89
63*89
63*77
Canso.
63-92
7; Serpentis ..
21 Sagittarii.
i Aquilae
11-660 18.14.41*68 41*01 | 45-01
18. 17. 54-01 53-05 -"-s
18. 28. 18*46 17-71
64-00
5 7*oS 64-03
21 '67 ' 63*97
63-99
64-02
63-94
GREENWICH OBSERVATIONS, 1892.
58
TELEGRAPHIC DETERMINATION OF LONGITUDE.
Star's Name.
-;
B
ii
Observed
Transit.
11
Star's Name.
Observed
Transit.
a Be
o t- o
1892 Sept. 14 continued.
Canso.
a. Lyrte
2 Aquilse
3 1 Lyras
Cephei 51 S.P..
Cephei 518.?.
y Lyrse
o Sagittarii
f Aquilse
n Sayittarii
d Sagittarii
a Aquilse
v Sagittarii
b Aquilse
i8 2 Cy,<;ui .......... ,
\ [Ji-sae Minoris..
ii '660
12-800
1 2 '604
ii '660
18. 32. 14-03
18. 35. 20*28
18. 45. 2*96
1 8. 49. 8*49
18.49
18.53
18. ?7
18.
9*11
51*67
11*96
24*88
19. 2. 19*69
19. 10. 18*19
19. II. 43*06
19. 14. 31*66
"660 19. 18. 47*37
19. 25. 19-59
19. 25. 21 '80
19. 29. 23-63
14-12
19-52
2-92
49-61
5 ' '59
10-95
24-45
18-70
17-21
42-59
3o"75
46-93
19-44
21*65
12*69
18-29
23-58
6-96
53^5
53-95
55-81
15-00
28-56
22-77
21*27
46*71
3472
51-19
2375
25-81
16*86
64-17
64-06
64-04
64-34
63*10
64-22
64*05
64*11
64*07
64*06
64*12
63*97
64*26
64*31
64*16
64*17
64-14
64-03
64-00
64-18
64-00
64*06
64*02
64*00
64*06
63*91
64*19
64*24
64*09
K Aquilse ....
a Aquilse ...
/SSagittie. ..,
/Sagittarii.,
y Aquilse ...
S Sagittse. . .
a Aquilse
17 Aquilse
/3 Aquilse
Groomhridge 1119 S.P
69 Aquilse
e Delphini
j8 Delphhri
v Capricorni
a Delphini
a Cygni
ii '660
12*263
1 1 *66o
19. 30.
19. 32.
19. 35.
19. 39.
19. 40.
19. 41.
19. 44.
19. 45.
19. 48.
19. 48.
20. 22.
2O. 27.
2O. 31.
2O. 32.
20. 33.
20. 36.
3*60
50-I7
9-90
2-92
5*80
3^*34
29-13
56-90
58-93
57-3
59-12
1-61
27-40
42-25
2-87
49' 6 3
9-56
1-98
5 '34
32*01
28-61
56-26
58-38
9'5-
58-42
1*13
26*97
52-43
35*11
42*49
375
6*22
9'53
36-28
32*92
0-40
2*59
14*83
273
5H2
31-28
56*81
39-50
46-94
64-26
64*22
64-19
64*24
64*19
64*27
64*31
64*14
64-21
64*32
64-31
64-29
64-31
64-38
64-39
64*45
64-19
64-14
64-11
64-16
64*1 1
64*19
64-22
64*05
64*12
64-19
64-17
64*18
64-25
64-26
64-32
1892 Sept. 15.
Canso.
a Lyras
2 Aquilse
0' Lyrse
Cephei 51 S.P...
TT Sagittarii
d Sagittarii
u Aquilte
b Aquilffi
\ Ursse Minoris.,
11*660
9'-77
9*425
18. 32. 12*91
18.35. 19-19
18.45. '-43
18. 49. 9*98
19. 2. 18*13
19. 10. 16*70
19. II.4I-57
18. 46*04
19. 29. 12*96
13-09
18*43
''47
49-25
17*15
15*76
41*17
45*64
7-12
18*26
23'57
6-94
54'53
22*75
21*25
46*70
51-17
'5'44
65*17
65*14
65'47
65*28
65-60
65-49
6 5'53
6 5'53
68*32
65-14
65-11
65-55
6 5'43
65-47
65*46
1 Cygni
A. Ursse Minoris
tr Aquilae
/8 Sagittas
/Sagittarii
y Aquilse..
8 Sagittse
Groombridge 1119 S.P
1 1 -660
11*967
1 1 -660
13*443
19. 25.
19. 29.
18
16
19. 32. 49
'9- 35'
'9- 39
19. 40
19. 41. 31
19.48. 59
18*33
9*14
48-50
8-36
0-80
4*04
30-84
6-64
2374
5-44
53-83
'373
6 -20
9-52
36*26
16*20
65-41
66*30
65'33
65-37
65-40
65-48
65-42
69-56
65-34
65-25
65-29
65-31
65-39
65-33
1892 Sept. 16.
Canso.
1 Aquilse
a Lyrse
2 Aquilse
29 Sagittarii....
0- Lyrse
Cephei 51 S.P.
Cephei 51 S.P.
y Lyrse
11*660
12*641
12-728
1 1 *66o
18. 28. 15*70
18. 32. 10*95
18. 35. 17*40
18. 42. 1 1 -94
18. 44. 59*91
18. 49. 14*82
18. 49. 11-55
18. 53. 4878
15-20
11*59
16*89
11*18
0*38
49*85
47*20
49-20
21*64
18*24
23-55
17*69
6*92
5S-07
5577
66*44
66-65
66-66
66*51
66-54
65*24
67*89
66-57
66-42
66*62
66-63
66-47
66-50
66*52
( Aquilse
to Aquilse
y Aquilee ,
S Sagittse
Groombridge 1119 S.P
f Cygni
15 Delphini
a Cephei
W
W
w
W
W
W
W
W
ii *66o 18. 59. 22
,, 19. 1 1. 40
19.40. 3
, 19. 41. 29
15*040 19.48.57
20. 40. 45
20. 43. 24
2'- '4- 55
11*660
08
27
'21
'97
16
'97
78
63
22'02 28*53
40*16
2*48
29-37
10*67
24*08
46*68
9'5'
36-25
17*56
52*56
31-22
2*22
66-51
66'52
67-03
66-88
66-89
66-91
67*14
65-87
66*46
66*46
66-94
66*79
66-82
67*05
Sept. 15. Groomb. 1119 S.P. Observer's note. Observed by Eye and Ear. Cloudy, not considered a good observation.
Sept. 1 6. The level of the instrument was altered between the observations of a> and y Aquilse.
STAR-TRANSITS OBSERVED BY MR HOLLIS WITH TRANSIT E.,
AND
RESULTING CLOCK ERRORS.
Star's Name.
.3
Observed
Transit.
3*8
-
Silt
O I- O
-
"
Star's Name.
/I
Observed
Transit.
S
op.55
B
-a rj
1892 Apr. 18.
Polaris S. P.
Polaris S.P.
Virginia ...
1892 Apr. 19.
y l Leonis
j Ursie Majoris
<r Leonis
Bradley 3147 S.P. .
Bradley 3147 S.P. .
j8 Leonis
/3 Virginis
Groombridge 1830 .
o Virginis
Bradley 1672
Bradley 1672.
5 Corvi
q Virginis
23 Coniie
1892 Apr. 21.
Virginis
S Leonis
/3 Virginis
Groombridge 1830 .
ii Virginis
7' Virginis
37 Virginis
z Ursa; Minoris S.P.
2 Ursse Minoris S.P.
Virginis
1892 Apr. 22.
a Ursse Majoris....
X Leonis
\fi Ursse Majoris....
|8 Crateris
5 Leonis
B.A.C. 3863
B.A.C. 3911
Bradley 3 1478. P..
Bradley 31478.?..
3 Leonis
Virginis
W 9
W| 9
Wl 9
W 8
W 9
10 13*232
10 | 12*987
9 12*420
12-420
PI
13-017
775
12-380
it
it
12-051
9734
12-420
h m s
13. 17-48*05
13. 17. 43*03
13. 28. 32-85
10. 13. 22-05
11. II. 46-52
ii. 14. 55-31
ii. 26. 55-64
11. 26. 56-97
n. 42. 54-02
11. 44. 25-22
11.46. 6-54
" 59- 3'57
12. 14. 10-36
12. 14. 17-76
12. 23. 37-76
12. 27. 33-60
12. 28. 49-54
23-85
22-91
21-80
46-42
54-90
45 '49
45-26
5 3 '96
25-00
6-85
3 '44
31-85
36-21
37-10
33-02
371
37'
12-69
2-04
26-74
35'5
25-03
25-03
34'3>
5 '3
47-06
437
'3'9'
13-91
'77'
13-40
49-33 ! 29-65
12*420 ii. 39. 3-48
11.42.53-48
,, 11.44.24-46
,, 11.46. 6-43
12. 3.53-58
3' 2 5
53'*5
24-24
6-17
53'3 6
I2-42O 12. 35. 31-40 j 31*27
,, 12.45.27-63 27-50
14-488 12. 53. 0-74 59-70
14-659 [ 12. 52. 58-51 | 58-67
I2-420 | 13. 3.41-9514173
I2-42O
11-634
16-229
I2'420
10. 56. 25-58
10. 58. 46-52
11. 2. 56-11
II. 5. 40-52
ii. 7- 4' '83
II. 15. 13-97
11.23. *5'33
ii. 26. 43-21
II. 26. 39-67
ii. 42. 53' 10
ii. 44. 24-12
2572
46-76
56-30
4O'8o
42-05
14-22
*5'57
44-20
42-22
5 3 '*4
24-28
44-20
34'3
5-29
47 '4
34-26
12-36
8-28
41-56
41-56
22-72
6-29
2773
37-20
21-59
23-08
55-00
6'37
25-67
25-67
34'*9
5-28
39-86
40-80
40-30
40-24
40-32
40-15
39'54
3977
4'35
40-30
40-21
40*26
42-06
377
40 "6 1
40-38
40-32
40-95
41-05
41-05
40-87
40*90
41-09
4078
41-86
42-89
40-99
40-57
40-97
40-90
4079
41-03
40-78
40-80
4 ' '47
43 '45
41*05
41-00
Greenwich.
40-29
25 Canum Venaticum
m Virginis
B.A.C. 4572
Greenwich.
40-26
4'33
40*16
4'35
40*30
4O '2 1
40*26
40-38
40-32
/Virginia
B.A.C. 4254
37 Virginia
e Ursse Majoris
2 Ursse Minoris S. P.
2 Ursse Minoris S.P.
8 Virgiiiis
S Comse
65 Virginis
Polaris S.P. ..
Polaris S.P.
o Draconia...
Arcturus .
Greenwich.
40*95
41*05
41*05
40-87
40-90
41-09
40-78
40-9
Polaris S.P
f Virginis
25 Canum Venaticum
a Draconis
Arcturus
106 Virginis
p Bootis
jj. Virginis
Greenwich.
40*97
40*90
4079
41-03
40-78
40*80
41-05
41*00
Groombridge 1830.
b Virginis
IT Virgiuis
o Virginis
Bradley 1672
Bradley 1672.
q Virginis
23 Comae
/ Virginis
X Virginis....
7* Virginis . . . .
ft Comae ] Wj 9
Spica
Polaris S.P. ..
12*420
12*420
10*755
10*712
12*420
12-057
13-966
12-420
12*420
12-420
H
I I '606
10-473
12*420
I2-420
13-338
13-264
12*420
13.32. 1-54
13. 35. 18-16
13. 37. 3878
12. 30. 34-95
12. 32. 13-25
12. 45. 28-32
12. 48. 38-67
12. 53. 8-42
12. 53. 9*86
13. 3.42-94
13. 6. 11-31
13. 17. 4-62
'3- '7- 55'97
'3- '7- 47'5S
14. o. 50-83
14. 10. 5-38
13. 6. 11-05
13. 18. 50-70
13. 17. 18*29
13. 17. 28-53
13. 28. 32*11
13. 32. 0-95
14. o. 50*81
14. 10. 4-77
14. 22. 2074
14. 26. 3I'3I
14. 36.4273
II. 46. 6"25
ii. 53. 45' 6
11. 54-4'39
11.59. 2-49
12. 14. 40*28
12. 14. 31 '24
12. 27. 32*49
12. 28. 48*60
3- 33'93
12. 33. 0-52
12. 35. 31-35
1-44
17-63
38-28
34'4'
12*79
27*88
39-08
'59
0-83
42-49
11-26
4-18
26-18
21-84
5"'59
5-21
io'8o
50-49
22-30
28*46
31-98
o'8o
50-66
4-63
2O'6l
31-16
42'6o
6-34
45-21
40-54
2*64
29-98
3*75
48*82
34''9
0-78
31-60
41*66
57-84
18*33
14*76 I
53''4
8*28
19-52
41-41
22-72
51-68
44'34
3*88
3*88
3' 77
45' 6 5
51*68
31*46
4''7
4''7
12*71
41*67
3'77
45-66
1-25
12-30
23-38
47 '3
26-18
21-50
43-68
13-08
13-08
'3'39
29-64
'477
41-51
12-35
40-22
4O '2 I
40-05
4'35
4'35
40-40
40-44
40-82
40-58
40-23
40*42
40*16
3770
42-04
40-18
40-44
40-88
40-97
41-87
357'
40-73
40-87
41-11
41-03
40*64
41*14
40*78
40*69
40-97
40*96
41*04
37*10
43*10
40*64
40*82
40*58
473
475
s
40*20
40*19
40*03
40-34
40-34
40-39
40-22
40*41
40*15
40*42
40-87
40-96
4072
40-86
41 "02
40-63
4I-I3
477
40-69
40-97
40*96
41-04
40-64
40'82
40-58
473
475
60
TELEGRAPHIC DETERMINATION OF LONGITUDE.
1
s
T3
^
>,
.
V
"s^s
-d
*" G
5 rs~-
i Name.
1
?
"o
. o
SI
Observed
Transit.
2.T5
81
I 2
--^ pi
o3
o -3 c
o 63
Mil
Star's Name.
1C
1
s
"o
41
-4 g
Observed
Transit.
-8-1
gi
: : -*- 1
3 5
it-4
5 Ss ^ S t ^
H
o
.H
8 H
a
^-2 X
6
a
5^
Si!
z~2. 5*-;
X
a
<
la 3
i
1892 Apr. 22 ccmtanwed.
38 Virginis
2 Ursae Minoris S.P.
9 Virginia.
Comae ....
65 Virginis.,
W
\V
W
Polaris' S.P... . ..|W
1892 Apr. 23.
7 Ursse Majoris.
o Virginis
n Virginis
I 2 '420
12*650
12 '420
13*609
I2*42O
12. 46. 5970
12. 53. I- 4 6
59-95
2-26
13. 3.41-51 ! 41-66
13. 6. 10-67 i 10-78
13- 17- 3'3 2 ! 3'49
13. 17. i8'io ' 24-38
40'55
41-64
ii. 47. 29-94
11. 59. 2*48
12. 3-53-37
30-10
2-49
53'37
11-38
43-68
34 ZS
1892 Apr. 25.
Bradley 3147 S.P
E 10 14-014
Bradley 3147 S.P W
Crateris W
v Virginis W
ft Leonis W
ft Virginis W
Groonibridge 1830 |W
y Ursse Majoris W
o Virginis W
e Corvi W
Bradley 1672 W
Bradley 1672.
/Virginis
B.A.C. 4254..
7 1 Virginis...
I3-935
12-420
10-995
15-362
12-420
ii. 26. 49-35
ii. 38. 36 84
ii. 39. 38-15
ii. 42. 52-72
ii. 44. 23-80
11.46. 5-44
ii. 47. 29-64
11. 59. 2-23
12. 3.53-93
12. 14. 23-47
12. 14. 20*15
12. 30.33-52
12. 32. 11-90
12. 35. 30-99
36-51
37^7
5 2 '59
3-59
5-48
29-85
2 'O6
53-58
3278
32-50
33-3
11-78
26-49
18-29
19-61
34' 2 7
47*01
11*35
43*67
35 ' 2 5
11*89
11*89
1475
53-I3
12-35
1892 Apr. 26.
Bradley 3147 S.P E 10 12-064 11.26.49-83 42-23 26-80
Bradley 3147 S.P.
{ Virgiuis
ft Leonis
ft Virginis
y Ursje Majoris....
ii Virginis
Bradley 1672
Bradley 1672.
/ Virginis
B.A.C. 4254 .
y 1 Virginis ...
B.A.C. 4277..
38 Virginis ...
I5-954
12-420
11-071
15-392
12-420
ii. 26. 48-60
11.39. z'&7
n. 42. 52-76
ii. 44. 23-98
11. 47. 29-66
12. 3.53-I2
12. 14. 19-06
12. 14. 19-68
12. 30. 3373
12. 32. I2'OI
12. 35. 31-10
12. 37. 25-50
12.46. 59-83
42-56
2 '55
52-48
23-62
29-78
52-78
29-83
3 3 '49
33'4i
1 1 '70
30-80
25-20
59-52
26-80
44'I7
34 - 27
5 -2 7
11-34
34-24
11-40
ii -40
I4-75
53-I3
12-35
6-45
40-55
2 Ursse Minoris S.P
Polaris S.P
TJ Ursse Majoris
f Bobtis
17-533
14-508
12-420
i 2 - 53- 4'53
13. 17-42-71
'3- 4 2 - 37'67
'4- 35- I9"49
59'5
26-35
37-73
19-19
42-34
6-18
19-63
I '01
1892 May 5.
40-60
39-38
22-73 4'7
51-68 40-90
44-35 40-86
41-28
41-19
40-88
ii. 26. 51*96 j 45-37 26-49; 41-1
42-18
4178
41-64
41-68
41-68
4i'S3
41-50
41-61
41-67
39-11
39'39
4i - 39
4I-35
41*50
44'57
44-24
41-62
4179
41-65
41-56
41-46
4I-34
4''43
4'-55
41-25
41-03
1892 Apr. 27.
2 Ursse Minoris S.P E 10 11*059 i 2 - 53- 5'94 5971 4 2 '34 4 2 "63
42-84
39-83
41-90
41-82
Greenwich.
s
40*60
41*07
40*90
40*86
Polaris S.P
f Virginis
25 Canmn Venaticuin
\ Virginis
2 Libra
Greenwich.
41-19
40-88
7 1 Virginis...
B.A.C. 4277.
Greenwich.
4178
41-64
41-68
41-68
41-53
41*61
41*67
4''39
4i'35
41*50
2 Ursse Minoris S.P.
(> Virginis
ft Coiuse
Polaris S.P. ..
Greenwich.
41*62
41-79
41*65
41*46
41-34
41-43
41-55
41-25
41*03
if Virginis
5 Virginis
2 Ursa; MiuorisS.P.
2 Urssa Minoris S.P.
Virginis
ft Conise
61 Virginis
Spica
Polaris S.P. ..
Greenwich.
B.A.C. 4277
37 Virginia
38 Virginis
e Ui>se Majoris
2 Ursse Minoris S.P
Polaris S.P
Spica
P Virginis
f Virginis
25 Canum Venaticum
m Virginis
Polaris S.P
25 Camuii Venaticum
TO Virginis
T) Ursce Majoris
41-81
p Virginis j W
o 2 Librse W
ft Ursfe Miuoris W
ft Bootis j W
if Bootis j W
Waterville.
io'o8o
12-420
12-420
12-420
I2 '333
16*178
12*420
12*028
1 1 '306
12*420
12*420
12-454
16-630
12-420
M
i>
12-044
11-151
12-420
12-420
13. 17. 24-97
13.28. 31*51
13.32. 0-51
14. 12. 36-23
14. 16. 57-28
12. 35. 3! "OO
12. 37. 25*20
27*17
3'77
0* 7 I
36-50
30*90
25'10
12. 37. 25-16 25-02
12. 45. 26*98 26*87
12.46. 59-43 59-28
12-48. 37'55
12.53. 5'9 6
37*96
0*89
1 2 - 53- 3'57 i 59'7
13- 3-4'-3i 4 1 '' 2
13. 6. 10*14 ' 10*09
13. 17. 33*88 21*04
13. 17. 49*91
13. 18. 50-11
13. 25.41-15
13. 28. 31 -56
13. 32. o'i8
13. 35. 16-92
12. 48. 4-58
12. 49. 29-98
12. 53. 9*74
1 2 - 53- 5'5
13- 3-4>'55
13. 6. 10-24
13. 12. 5-46
13. 18. 50*02
13. 17. 41-06
13. 17. 47-79
13. 31. 59*98
13. 35. 16*86
13- 4 2 - 37'58
14. 36. 42-16
14. 44. 14-44
14. 50. 24*38
14. 57. 13*05 |
14. 59. 9-22
32-99
49-92
40-99
31-43
0-31
16-74
4' 2 3
29-72
4*87
1*98
41-14
10*06
.4-96
49'57
25-89
28*54
59^9
16*53
3777
41*72
13*92
25-32
12-99
9-02
4-35
1271
41 68
17*27
38*26
12*35
6-46
6-45
8-28
40'55
19-47
42-00
42 "oo
22 73
51-68
5' 2 5
5' 2 5
3 1 '47
22-28
12-72
41-68
57-88
45'45
ii "09
42-16
42-16
22*73
51*68
46-52
3 1 '47
5-69
5-69
41-68
57-88
19-63
2 3'45
55-60
7-32
5475
50*83
37-18
40-94
40-97
40-77
40-71
4 ''45
41*36
4I-43
41-41
41-27
41-51
41-1 1
42-30
41 '61
4I-59
44-21
32*26
4I-55
41*29
41-29
4i'37
41-14
41 '22
4'37
37-29
40-18
4^59
41 '62
41*56
41*90
39-80
41*69
4I-35
41*86
4173
41*68
42*00
41*76
41*81
t|/ Ursae Majoris
W
9
12 '420
F,
4
I2'42O
i j. 55. 45 '19
45 *^3
21 '43
7 ^ *6O
-: c'6i
Ursre Majoris
W
q
26"5&
F
Q
1 1. Co. 7 "-I C
7 'QQ
4-"-5"6l
* 3 ^
31; "62
-^62
ff Leonis
W
"
F
12. 3. 34*21
34*87
lo*-;?
-1C 'CO
83 Leonis
W
8
d.2"78
V
12. 14. 31 '27
2Q*?2
Bradley 3147 S.P
W
c
35 4 1
35 47
2 9 45
37 44
W
TO
9'96l
12. 14. 3I'll
25-38
7*31
41*93
Bradley 3147 S.P
K
7
7-687
ic'Sr
W
12. ^ s. ?6'o8
-16-6-1
12*^2
F,
A2 - C8
l8 '21
35 l
W
47 '^
22*71
-8 Leonis
F,
8
I I. 42. S7"Q7
58*60
35 3
W
12. 45. 32*10
32*64
8*26
71; '62
j3 Virginis
E
7
W
"
12. 48. 43*64
43*96
19*36
TC'dO
y Ursae Majoris
F,
1 1 '18
35 t 02
W
11*368
12. C7. 4.'2O
4-? '62
JJ ' J
35 43
STAR-TRANSITS OBSERVED BY MR HOLLIS WITH TRANSIT E., AND RESULTING CLOCK ERRORS.
OBSERVATIONS AT WATERVILLE.
61
i 's Name.
a e
1 *
Observed
Transit.
111
Star's Name.
Observed
Transit.
II
<
t,
III
1892 May 5 continued.
i UrsiB Minoris S.P.
/3 Comai
58 Virgiuis
Polaris S.P. ..
1892 May 6.
j8 Ursae Majoris
X Leonis
fy Ursa; Majoris
B.A.C. 3837 ,
83 Lrouis
Hradley 3147 S.P.
Bradley 3147 S.P.,
Leonis
3 Virginia .,
7 Ursae Majoris
b Virgiuis
o Virginia
1892 May 7.
Bradley 3147 S.P..,
/3 Virginia
Groombridge 1830.
y Ursie Majoris
b Virginis
o Virgiuis
ii Virginis
Bradley 1672
Bradley 1672.
Corvi
X Virgiuis....,
7' Virginis....
B.A.C. 4277..
38 Virginis...
1892 May 9.
Ii Virgiuis
IT Virginis
o Virginis
10 Virginis
q Virginia
/ Virgiuis
X Virginis
7 1 A irginis
B.A.C. 4277
37 Virginis
e Ursse Majoris
2 Ursae Minoris S.P.
1892 May 11.
Polaris S.P.
Polaris S.P.
Groombridge 750 S.P.
5 Ophiuchi
cT 1 Coronse
19 Scorpii
7 Herculis
p Ophiuchi
X Ophiuchi
i] Draeonis
E 10
E ; 9
E 8
E 10
2 Ursse Minoris S.P E
$ Com se E 4
1892 May 13.
J UrssB Minoris
Groombridge 750 S.P.
w
9-610
12-420
12-395
12-420
13-867
12.53. 6*13
13. 6. 15*39
13. ii. 12*77
13. 17. 28-99
10.54.43-05
10. 58. 48*74
11. 2. 58-37
II. 7.47-20
II. 20. 39-39
II. 26. 46-48
7'74
i6"oo
'3'45
33-03
43-44
49-50
58-89
47-96
40-17
11.26.45-97 53-07
12-420 ii. 42. 55-50 ! 56-11
i ii. 44. 26-41 1 27-10
ii. 47. 32-96 1 33-19
ii. 53. 47'66 48-33
! ii. 59. 4-90 5-54
43*62
51*66
48*93
9-72
21*25
27-60
36-98
25-98
18-19
29-74
*9"74
34"'9
5-20
ii'i6
26-11
43*61
17-363
12-420
13-679
16-483
12-420
ii. 26. 44*19
n. 44. 2 3'64
1 1. 46 5 "69
ii. 47. 30-11
n. 53. 44-65
ii. 59.
12. 3
12. 14
2-07
52-88
37' 6 4
51-66 i 30-04
2 4'47 ! 5" r 9
6-26 I 46-88
11*14
26-10
43-60
34*18
30-47
45-47
2-86
53' 6 9
25-83
12. 14. 37'23 29-20
12. 28. 2*38 , 3-47
12. 33. 0-05 I*04
12. 35. 30*74 , 31*69
12. 37. 24*86 25*81
12. 46. 59'2I
O'l8
12-420
15-026
4-908
12-420
12*164
11-146
12*420
10-419
9-684
12-420
II. 53.
II. 54.
11. 58.
12. 3.
12. 27.
12. 30.
12. 32.
I2 - 35-
12. 37.
12. 45.
12. 48.
12. 5 2.
39-35
3473
56-93
23-77
26-52
27-98
5475
2 5'54
19-49
21 '62
33-37
5^37
12. 52. 51*51
13. 6. 5-15
13. 17. 6-37
13. 17. 2'66
40-46
35-81
58*00
24-89
2 773
29-16
55^5
26 69
20-64
22*73
3377
59-53
6-37
6-37
43'9i
41-48
12-32
6-43
40-53
26-09
21-41
43-59
-o'35
13-34
14*72
4i'47
12-31
6-42
8-25
19-31
44-3I
58-17 44'3'
6'i6 51-65
23-96
22-33
15.47. 9-03 7-82
16. i. 32-59 36*68
16. 1.31*34
16. 7. 4778
16. 9.45*27
16. 13. 15*14
16. 16. 16*36
16. 18. 13*31
16. 19.52*59
l6. 21. 40*53
35'99
48*04
45 "*9
15-52
16-49
13-69
52-94
40-13
13*04
13-04
2*56
30*97
30-97
42-69
3978
9-87
10-99
8-19
47>3
Waterville.
35*88
35-66
35-48
36-69
37-81
38-10
38-09
38*02
38-02
38-12
36-67
38-08
38*10
37^7
37-78
38-07
38-38
4072
40-62
40-67
40-63
4074
40-49
40-54
37-I7
40-44
40-44
40-63
40-62
40-35
45-63
45-60
45-59
45-46
45*61
45-56
45'5 2
45*62
45-78
45'5 2
45-54
44*78
46-14
45-49
49-08
5071
54-74
54-29
54-49
54-35
54-5
54-50
54-49
5474
35-55
Polaris S.P
I- Virginis
( Virginis
25 Canum Venaticum ,
Waterville.
38-21
38-19
38*11
38*09
38-11
38-13
37-79
38-07
ii Virgiuis....
Bradley 1672.
Bradley 1672.
23 Corns
Polaris S.P. ..
Polaris S.P ,
25 Canum Venaticum .
m Virginis
B.A.C. 4572
i) Ursae Majoris
Waterville.
40-75
40*64
40-64
40-74
40-48
40-39
40-38
40-57
40-56
40-27
2 Ursse Minoris S.P. .
2 Ursae Minoris S.P.
3 Comae
Polaris S.P
Polaris S.P
P Virginis
h Virginis
J Virgiuis
25 Caimm Venaticum ,
m Virgiuis
B.A.C. 4572
86 Virginis
88 Virginis
Waterville.
45-64
45-61
45-59
45-46
45-58
45 '5'
45'47
45-56
457 2
45-45
58 Virginis
6 1 Virginis
66 Virginis
Polaris S.P.
Polaris S,
j,' Virginis
25 Canum
ra Virginis
f Bootis
p. Virgiuis.
5 Librae..
a 1 Librae.
a 2 Librae.
Waterville.
ri Ursoe Majoris.
Arcturus
a Corouse
Waterville.
(3 Herculis .
54*24
54-08
53-93
54-08
54-o8
54-06
x Ophiuchi
f Ursse Minoris .
a Herculis
8 Herculis
J Ophiuchi
a Ophiuchi
3 Sagittarii
p Herculis
96 Hercnlis
13*885
12*420
13- i/- 2 3"39
13. 25. 46-04
13. 28. 36-57
13.32. 5-61
12-420:12. 3.55*76
12*621 1 12. 14. 41*10
13*997 I 12. I4.39-45
12*420 ; 12. 28. 51*05
11-360 13. 17. 22*o8
'5'55 2
12*420
13- 4 2
13-35
3-05
18-94
39-84
41-03
IO 12*520 12. 52. 58*14
16*852
I2*42O
II*I26
I2*42O
F,
9
I 2 '4
lia
F
4
F,
9
.p.
F,
10
10-9
,P
W
10
15-0
w
q
12*4
n Venaticum
is ...'... .
W
w
9
q
11
F,
q
s
F
9
F,
9
F,
<;
E
7
12. 52. 58-50
13. 6. 10-41
13. 17. 11-54
13. 17. 15-82
13.25. 40-75
13. 26. 36-48
13. 28. 31-10
13. 32. 0-48
13. 35. 16-39
'3- 37- 3 6 '9 2
13. 39. 3075
13.41. 58-95
13. ii. 2-27
13. ii. 5970
13. 18. 10-56
13. 17. 4-69
13. 17. 2'68
13. 28. 25-94
'3- 3'- 55" 2 3
13. 35. 11-04
14. 35. 14-29
14. 36. 36-73
14. 39. 15-16
14. 43. 57-61
32-51
46*60
37-12
6-05
9-72
22-31
12-75
41-68
56-42
29-58
3171
34-I9
1 6-86
' 6-86
i 29-59
34'2O 1O"I2
30-55
3'5
19-67
40-56
4>'33
10-12
41-68
57-9I
18-40
19-60
2 '54 43 '93
4'40 43 '93
11-07 ' 5i'66
29-48 10-57
28-68
4172
37^7
32-04
I-I 9
I7-37
3'75
59 "9 2
3-60
i-ii
11-85
2 4'53
27-60
27-08
56-01
12-24
1 5 '43
38-02
16-53
58-99
14. 44. 8'8i 10-19
10-57
22-31
1 8 -08
12-75
41-67
57 '9 2
18-41
12-30
40-31
48-93
4 6 '53
57-I5
11-69
11-69
1275
41-67
57'9 2
1-09
2 3'55
1-93
44-30
557'
12-420
12-420
12-420
42. 29-79
9- 55-9I
29. 18-82
16.24.41-54
16. 51
16. 56
17. 8
17. 9
17. 18
17. 20
'7- 39
17. 41
17. 56
39-89
17-22
50-12
42-48
52-88
15-80
52-33
20-66
5 2 "35
29-59 19-57
56-06 4575
18-91 873
41 '65 j 3 6 '33
.40-12
15-19
5'33
42-62
53"3 2
1 6 '07
5 2 79
20-78
52-52
34-90
1 2 "02
44-90
37" 2 7
48-02
10-81
47 '43
i5"39
47 '4 1
37-21
357'
35-63
35"63
3777
37-28
35"'5
37-86
35 '9 2
39'57
38-18
38-24
37-84
38-27
4I-39
39'53
40-59
41-09
41-89
4 '59
40-61
40-71
40-48
4'55
40-52
40-55
40-39
45-33
45'4*
45'3
47-16
44-09
45 ' 6 7
45-66
45-68
45-66
45-53
45-40
45"3'
45'5 2
49-98
49-69
49-82
54-68
5478
56-83
54"57
54^5
547
5474
54 64
54-61
54-89
TELEGRAPHIC DETERMINATION OF LONGITUDE.
.Star's Name.
2
Observed
Transit.
sg .
s-;
5S.S
o
5 *
o.o
>*
Star's Name.
Observed
Transit.
Sg .
1892 May 15.
Waterville.
a Serpentis
( Serpentis
( Ursse Minoris
Groom bridge 750 S.P.
V9"|[ ">'
Groombridge 750 S.P. .
S Ophiuchi
<r 2 Coronae
1 2 '420
IO'I28
10-341
12*420
15-44- 27-39
'5- 47- 4 '44
16. i. 26*91
16. i. 26*37
16. 7. 42-63
1 6. 9. 40' 1 1
5873
2775
3"'5
3''55
3''57
42-99
40 '20
27-57
2- 5 6
3I-O2
31 "O2
42-71
5 9 -82
5 9 -82
59'4I
59-47
59-45
59-72
5977
59'43
59"42
59-28
/3 Herculis ...
49 Herculis ..
K Ophiuchi ...
Herculis
Draconis ...
8 Herculis....
a- Ophiuchi . .
12*420
12-420
16. 24. 36-35
16. 46. ii '39
16. 51. 3472
1 6. 55. 1 1 '20
17. 7. 32-35
17. 9. 37-20
17. 20. 10-52
3 6 '55
n-68
35'5
11-37
3' '94
37-42
10-88
3 6- 35
11*44
34-93
11*19
3I73
37'3'
10*85
59-80
5976
59*88
59*82
5979
59*89
59^7
59-32
59-25
59'3 6
59'29
59'33
59*40
1892 Auir. 1C.
Waterville.
a Lyrse
29 Sagittarii
Cephei 51 S.P...
( Aquilse
Sagittarii
01 Aqnilse
v Sagittarii .. ..
* Aquilse
/B-Cygni
A Ursae Minoris.
\ Ursae Minoris
a Aquilse
Groombridge 1119 S.P.
ff Aquilse
ff Capricorni
B.A.C. 7014
E
E
E
E
E
E
E
E
E
13*450 | 18. 32. 32-68
ii i'8. 42. 31-19
13-111 I 18. 48. 39-77
13-450 18. 59. 42*28
,, , 19. 2. 36*06
,. I 19. 12. 0*46
i 19. 14. 48-13
,, ; 19. 19. 4-82
119.25.3774
12*822 19. 31. 40-82
12*820
13-450
14*684
13*450
19. 31. 50-95
19.44. 46-65
19. 47. 11-83
20. 4. 59-61
20. 14. 12-26
20. 17. 5-37
32- 7 8
32-15
54-10
42-77
37-03
0-98
49-03
5-33
38-03
4-09
3'73
47-02
59-21
O'll
12*94
578
18*08
40*27
28-93
23*09
47-05
35''3
51-51
24-15
49-19
49-19
33-18
44-77
46-43
59-34
52-04
46-11
45-93
46-17
46-16
46*06
46-07
46*10
46-18
46*12
45-10
46-16
45-56
46-32
46*40
46*26
Ati8 h
Sidereal.
46*06
45-86
46-06
45-96
45-95
45-98
46*05
45 '99
46*12
46*18
46*03
a Equulei
30 Capricorni
<r Cygni
a Cephei
Groombridge 3548
(Jroombridge 3548 .
d Aquarii
K Capricorni..
( Pegasi
a Aquarii
50 Aquarii ...
Bradley 2993.
ii Aquarii
Pegasi ......
13-450
12-966
16-649
13-450
13*450
10*524
13*450
9. 41*19 i 41-61
II. 9-84 I 10-57
26*41
16-64
21.
21.
21. 12. 26*57
21. 15. 17-63
21. 20. 44*17
21. 2O. 40-79
21. 33. 20-07
21. 35. 53-20
21.38. 8-37
21. 59. 2970
22. 17. 55 '66
22. 21. 24*14
22. 29. 4'00
22. 57. 48*02
.30-36
30-14
20-72
54">4
8*92
30-38
56'33
13-68
4 '49
48-10
28-00
5679
I 2 'So
272
16-89
16*89
7-02
4'55
55-33
16-75
42-68
59-91
50-90
46*39
46*22
46-39
46-08
46'75
46-30
46-42
46-41
46'37
46-23
46*41
46-48
1892 Aug. 18.
Waterville.
S Ura;e Minoris..
1 Aquilse
Lyrse
2 Aquilse
29 Sagittarii
Cephei 518.?..
Cephei 51 S.P. .,
d Sagittarii
o> Aqiulse
u Sagittarii
S Aquilse
1 Cygni
A Ursa; Minoris..
A Ursse Miuoris.
> Aquilse
a Aquilse
i) Aquilse
13-476
13-450
12*669
11-417
13*450
12*882
12-908
13*450
18. 7. 11*89
18. 29. 19-39
18. 33. 16*06
18. 36. 21 '07
18. 43. 15*22
18. 49. 37-31
18. 49.42*27
19. II. 18*74
19. 12. 44*04
19. 15. 32-21
19. 20. 2-52
19. 26. 21 *o8
19. 31. 38-36
41*92
6-go
19. 31
19. 41
19. 45. 30-24
'9-46. 5774
14-23
19-20
15*90
20*88
15*02
38-19
39-28
1874
44-06
32*20
2-53
21*13
46*21
39*28
6-63
30-07
57-56
13-26
22*01
18-86
23-92
1 8 -06
41 '20
41 '2O
21*56
47-03
35-12
5-51
24-13
47-14
47"i4
9-80
33"'7
0*64
59-03
2*81
2*96
3-04
3-04
3-01
1*92
2*82
2-97
2-92
2-98
3-00
0-93
7-86
3''7
3*10
3*08
2-76
2-91
2-98
2-97
2-71
2-86
2-80
2-85
2-86
3-01
2*93
2*91
Groombridge 1119 S.P.
B.A.C. 7014
69 Aquilse
Delphini
75 Draconis
75 Draconis ..
e Aquarii
15 Delphini ..
a Aquarii ....
i Pegasi
35 Aquarii
e Pegasi
Cephei
fl Aquarii ....
Bradley 2997.
( Pegasi .
1 ~
W,20
W| 8
14*418
13-450
15*890
19-145
13*450
13-611
13-450
19. 48. 40*32 42*76
20. 17. 49-08 ! 48-91
20. 23. 59-78 i 59-60
20. 28. 2-37
20. 35. 1*04
20. 35
20. 41
20. 44
22. O
22. I
22. 3
22. 4
22. 7
22. II
22. 22
22. 36
22. 37
2-41
49*60
28-57
13*87
58-36
3-52
44-69
6"2O
8-n
2 I '06
3-69
5 5 '42
2*20
0*67
3-25
49-60
28-59
13-88
58*41
3-52
44 7 '
6-38
8-n
22-84
37i
55-47
46*67
52-05
2-89
5'59
4-56
4*56
52-45
31-38
16-77
1-37
6-52
47'57
9*0 1
10-75
25*13
6-95
5873
3'9'
3''4
3-29
3-39
3-89
I'M
2*8 5
2 79
2-89
2-96
3-06
2-86
2-63
2-64
2-29
3-24
3*26
1892 Aug. 19.
S Ursse Minoris.
a Lyrce
Cephei 51 S.P. .
Aquarii
1 Pegasi
9 Pegasi
y Aquarii
W
w
w
w
w
w
W
11-675
13-450
'3"355
13-45
18. 7. 13-91
18. 33. 13-62
18. 49. 29-41
22. O. 11*01
22. I. 55*91
22. 4. 41*94 i 42*30
22.16. 1-55 1-98
8'i 3
>3'57
37-08
11-43
56-09
12-85
18-84
41-68
16*77
'"37
47-57
7-27
4'73
5-28
4-61
5'33
5-27
5-26
5-28
Waterville.
5-23
4-95
4-89
4-87
4-88
Bradley 2993.
Bradley 2993.
C Pegasi
7, Pegasi.
S Aquarii
15-208 i 22. 22. 1*27
17*818 I 22. 21. 59*67
13-450122.36. 1-13
22- 37- 53'
22. 48. 51*82
54-14
54-96
1-64
53-33
52-55
59-91
59-9 1
6*96
5874
57-92
576
4'94
5'32
5'4'
5'37
1892 Aug. 22.
o 1 Capricorni.
a 2 Capricorni.
e Delphini
13-450
20. ii. 30*00
20. II. 54-04
20. 27. 53-62
31-22
6-44
5'57
11-15
11*18
11*19
Waterville.
10*95
10*98
10*97
75 Draconis .
e Pegasi
W 20
W 6
i i * i 40
13-45
20. 34. 59-23
21. 38.43*36
52*69
44"'5
3*91
55-36
II '22
I 1*21
1892 Aug. 24.
B Ursffi Minoris
Waterville.
i Aquilse
Cephei 51 S.P.
i Aquilse
o Sagittarii
'5'394
13-450
12-045
13*450
18. 6. 51*96
18. 29. 6*72
18. 49. 29*48
18. 54. 29-85
18. 58. 0*07
55-25
6*3,
28*10
29*50
59*62
11*01
21-95
43-80
45-29
15*27
1576
15*64
1570
'579
15*65
15*60
1571
'5"57
f Aquilse
n Sagittarii..
ID Aquilge
v Sagittarii..
5 Aquilse
3 1 Cygni
13-450
19. o. i-**5
19. 3. 772
19. 12. 31*66
I 9 . 15. 19*76
I 9 . 19. 50-05
19. 26. 8
13*14
7*28
3 '-.3
'9'33
49*67
8*18
28-85
23*03
46-98
35-o8
5-46
24-06
1571
1575
15*68
'575
'579
15-88
STAR-TRANSITS OBSERVED BY MR HOLLIS WITH TRANSIT E., AND RESULTING CLOCK ERRORS.
OBSERVATIONS AT WATERVILLE AND GREENWICH.
63
Star's Name.
Position.
at
jt
I
R.A.
Microme ter.
Observed
Transit.
Corrected
Transit.
Tabular
Apparent
E.A.
Clock
Apparently
Slow.
-^"oo
Star's Name.
Position.
No. of Wires. 1
R.A.
Micrometer.
Observed
Transit.
Corrected
Transit.
Tabular
Apparent
E.A.
3 off.
lljl
U3
1892 Aug. 24 c
A Ursee Minoris
ynt
w
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
W
W
W
W
W
W
W
W
W
w
w
w
w
w
w
w
w
w
w
w
w
w
w
w
w
w
w
E
E
E
E
E
E
E
E
E
E
E
E
E
im
10
IO
9
9
6
5
5
6
12
9
9
4
9
5
9
9
9
'3
5
'9
6
9
9
8
9
8
9
IO
28
IO
9
8
6
9
9
8
8
8
9
7
6
6
6
9
9
9
9
9
IO
9
9
9
9
9
ted.
r
'3777
I4-7I3
13-450
9-806
13-450
17-119
13-450
M
9
lO'IIO
15-044
13-323
13*450
t
14-783
14-718
13-227
13-500
1
1
16-505
17-946
18-122
13-500
14-526
13-500
bun
19. 31. 25*62
19. 31. 14*93
18. 33. 0*83
20. 18. 5*35
20. 27. 47-77
20. 33. 23*68
21. 1.47-92
21. 15. 4473
21. 2O. 57*09
2'. 33' 49-0
21. 36. 22*6l
21. 38. 37*31
2'. 40. 49-59
21.47. 53''7
21. 59. 58*64
22. 1.43*25
22. 6. 50*98
22. 21.41 'OO
21. 21. 8*94
22. 21. 52*59
22. 35- 53-I9
22. 37. 45*01
22. 46. 47*57
22. 48- 43^2
23. 8. 32*41
23. 10. 2*83
23. ii. 22*66
23- '3- 9-37
23. 27. 56*38
18. 49. 22*38
19. 31. 33*25
19. 35. 59*20
19. 42. 21*77
19. 45. 18*20
19. 46. 4576
'9- 49- 47-90
19. 52. 37*74
'9- 53- 44-55
20. II. 27*34
20. II. 51-47
20. 12. 57-55
20. 14, 44 '29
20. 17. 36-99
20. 22. 29*85
20. 33. 28*16
2O. 33. 28*80
20. 34. 50*71
2O. 41. 38*02
20. 49. 45*15
20. 52. 56*57
21. I. 51*41
21. 8. 8*05
22. 21. 50*15
22. 29. 36*00
22. 44. 34*93
22. 46. 46*54
22. 48. 43*02
22. 59. 10-50
s
26*63
26*43
0-94
5-45
47*88
23-89
48*03
44'84
49*12
22*76
37-42
4973
58*76
43'35
51*08
4I-37
1*22
46*73
53'4'
45''3
47*88
44*26
32-71
3"'4
22*92
9*69
48-36
30-15
'375
59-5
22*07
18*55
46 'i 6
48-27
377o
44-84
27*81
5' '94
58-06
44-78
37-36
30-35
26-33
49-24
38-27
45'45
56*76
51*62
8-33
46*90
35^4
47-03
43-56
10*87
a
41*10
41*10
18-74
23-3
5"57
4I-97
5-85
2'64
,5-71
7 '06
40*61
55-37
7*68
11*26
16*82
9*04
5975
14*04
59-33
7*09
58*86
1*58
58*02
46-41
16-82
36-66
23-34
2-34
49-38
27-93
13-87
36-40
33-03
0-51
2-70
52*12
42*30
6*37
12*40
59-26
51*96
4479
40*98
40*98
3*07
52-67
59-68
10-97
22-68
59-16
51-06
49'93
1-50
58-04
25>2
1
s
14-47
14*67
1
17*80
17*85
17*69
1 8 -08
17-82
17-80
18-15
'7 "94
17-85
'7'95
'7'95
17-99
1 8 -06
1 8*06
17-96
18*38
<
12*82
12*60
13*68
'373
13*70
13*76
13*70
13*68
i3'74
13*65
13*98
(
19*23
14-18
14-37
'4'33
14*48
'4'35
'4'43
14-42
14*49
14*49
'4-43
'4'34
14*48
14*60
14-44
14*65
13*65
14*40
14*23
14*21
14*21
I4-35
12*26
14*61
14*69
'4'47
14*48
'4'55
Vaterv
s
Vateri
'775
17*66
17*48
'7'57
'7'53
17*64
I7-55
17-64
17-64
17*66
17-72
17*72
rreenu
'3"57
13*62
13-59
13*65
'3'57
13-55
13*61
13-52
'2reenu
'4"34
14*30
14*44
14*31
'4'39
14*38
'4 "45
I4-45
I4-39
14*30
14*44
I4-55
'4'39
'4'35
14*17
14*15
14*15
14-29
Gree
14-54
14-62
14-40
14-41
14-48
ille.
y Aquilse
E
E
E
W
W
"W
W
\v
w
w
w
w
w
E
E
E
E
E
E
E
E
E
W
E
E
E
E
W
W
w
w
w
w
w
E
E
E
E
E
E
E
E
E
E
E
E
E
W
W
9
5
9
8
7
9
9
9
9
9
9
5
9
IO
IO
IO
8
9
5
9
9
9
10
IO
8
9
8
6
6
9
9
1
IO
9
8
9
9
7
9
7
8
5
8
7
4
8
9
r
13*450
6*588
13*450
i
i
i
14*020
10*495
15*376
13-45
13*990
14-768
13-500
n
I 4 *i6 9
7758
13*500
J
14-657
16*134
13*500
11
I)
13-500
,3-878
io'68o
13-500
h m s
19. 40. 54-21
19. 42. 20-96
19. 45. 17-58
22. 21. 44*66
22. 58. 16*74
23. 4. 19-52
23. 8. 28-28
23- '9- 43'52
23- 43- 40-ii
23. 46. 43-88
23. 53. 30-22
23- 57- 57-13
o. 2. 32-44
o. 13. 37-35
o. 13.44-36
23. 27. 49-63
23. 46. 14-50
23- 53- 34-42
23- 59- 37-13
0. 2. 36*76
o. 4- 35-67
o. 7. 28*90
o. '3- 47-56
o. 13. 30*25
21. IO. 13*44
21. II. 42*27
21. 12. 58*15
21. 21. 1*28
21. 21. 6*62
21. 30. 50-04
21. 33. 52-27
21. 36. 2577
21. 38. 40-56
21. 40. 52-86
22. 21. 47-07
22. 21. 46*96
22. 37. 44*63
22. 44. 35-47
22. 46. 47-16
22. 48. 43-65
22. 56. 45 "21
22. 58. 20-32
22. 59. 10-89
23. 3. 29-88
23. 4.23-27
23. 3-29-38
23. 19. 46-93
23- 27. 5'77
23. 27. 54*99
23. 42. 10*78
s
54-03
20 '8 1
17-40
42*61
16*63
19*44
28*22
43-42
40*04
4379
30*14
57*08
42*84
43'53
49*11
14*82
37-49
36*95
36*03
29*16
49'49
46*63
13*87
42-83
56*66
i '06
50-55
52*66
26*28
40*91
53'35
42*91
44-91
3579
47-67
44*20
20*62
11*27
30*46
23*68
47-25
47-23
49'47
11*19
9
9*76
33''4
5975
34*70
37-66
46-31
'73
58-14
1-94
15-14
50-64
'"94
1-94
2-34
28*69
51*09
50*80
4975
42*96
59-17
59-I7
28*00
56*81
12*72
13*82
13*82
4-98
7*07
40*61
7*70
59*24
59-24
49'92
1*58
58*03
59*66
3478
25*41
3777
44'33
1-86
2-33
2-33
26-05
8
'573
15-71
'574
17-14
18-07
18-22
18-09
18-31
18-10
18-15
18-19
18*06
18*31
19*10
18*41
13*23
13-87
'375
13-60
,3*85
13*72
13*80
9*68
12*54
14*13
13-98
'4"37
17*16
12-76
H-43
14-41
'4"33
H'47
'4'35
16-33
15-72
14-02
14-13
13*91
13*83
14*28
14*16
14-14
13-86
14-09
14-38
14-61
15-10
12-86
14-86
3
'5'59
15-56
'5'59
17-68
'779
17-66
17-86
17-62
17-66
17-69
17-56
17-80
'373
13*60
'3 "45
13-70
'3'57
13-65
12-39
14-07
13-92
14-31
14-36
'4'34
14-26
14-40
14-28
13-93
14-04
13-81
'373
14-18
14-06
14-04
13-76
13-99
14-30
'4'53
'477
A Urs?e Minoris
S Sagittarii
o Aquilas
ille.
1892 Aug. 25.
58 Pegasi
Aquarii.
v Peeasi
Groombridge 3548
<f> Pegasi
d Aquarii
o> Piscium. .
K Capricorni
z Ceti
e Pegasi
a Andromedse
8 Capricorni.
Bradley 1672 S.P
1 6 Pegasi
Bradley 1672 S.P
a Aquarii
i Pegasi
4ch.
Cephei..
Bradlev 2993
1892 Sept. 4.
Groombridge 3548
Bradlev 2993
<* Pe-^asi . . ,
TJ Pegasi
\ Aquarii , ...
5 Aquarii
B A C 17
$ Aquarii
tp 1 Aquarii
Bradley 1672 S P
7 Piscium
Bradley 1672 S P
4* 3 Aquarii
1892 Sept. 5.
Cephei 51 S.P
A Ursa; Minoris
3 Sagittse
5 Sagittfe . ....
a Aquilie -.
vi Aquilie
8 Aquilse
it Cygni .. .
7 Sagittffi
a 1 Capricorni
a 2 Capricorni
ff Capricorn i
S 2 Capricorni
B.A.C. 7014
p Capricorni
Bradley 2701
Bradley 2701
75 Draconis
Cygni
32 Vulpeculse
v Cygni
6I 1 Cvgni
58 Pegasi
viwich.
1892 Sept. 6.
Bradley 2993
17 Aquarii
ju Pegasi
\ Aquarii ... ....
5 Aquarii
a Pegasi
Aug. 25. Bradley 2993 (W) was observed on the gth galvanic wire as clouds intervened.
TELEGRAPHIC DETERMINATION OP LONGITUDE.
1
J
b
^
i
.j
>, ^.-
Star's Name.
osition
*o
-is
2
Observed
Transit.
|| JJN
^ c ^
up
Star's Name.
.2
1
"o
.
s
rff
Observed
Transit.
3 -a
o C
11
jji-5
111
!T
ilil
tt
6
= H
|
.?F
&
o
K
i
s fl
H^'
H: " PI^M
1892 Sept. 6 continued. Greenwich.
r
h m s
3 S
S
s
r
h m s
H
,
H
8
B.A.C. 8285
W
7
w
o. 41. io - 68
1 I *OI
25-92
14*91
14-81
w
c
14*86
w
c-7 'q-i
14*76
14-66
a Andromeda
w
20 Ceti
w
' '
o. 47. 16*62
17-02
31-82
14-70
B.A.C. 17
w
w
9
IO
ii
15 '164
0. 4. 34-56
O. 17. 76*77
34-98 49*78
48-64 58*89
I4 P 80
14-71
w
w
9
IO
15 '077
o. 49. 59-82
o. 54. 2*87
59' 6 5
58-79
14-50
14-18
14-85
'475
Bradley 1672 S.P
2 Ursse Minoris
15 Ceti
w
s
I 7 'COO
O. 72. 2O'6c
flCeti...
w
q
0. VI. <7'-!6
C7'8i: 12-88
11 '07
2 Qrsae Minoris ..
E
7
I? *6 1 2
o. Cd. 1*58
58-24
14-18 15-94
1892 Sept. 7.
7) Capricorn! ....... ;
9 Caprioonti ........
6 1 1 Cygni ...........
7 Equulei ...........
fCygui ..............
a Equulei ............
30 Capricorni .......
Groombridge 3548
Groombridge 3548
K Capricorni ........
t Pegasi ..............
S Capricorni ........
/i Capricorni ........
16 Pegasi .............
i Pegasi
e Pegasi
Cephei
42 Aquarii
45 Aquarii
1892 Sept. 8.
/3 Sagittse
7 Aquilae
a Aquilse
a 1 Capricorni..
o 2 Capricorni..
69 Aquilae
t Delphini
Bradley 2701..
Bradley 2701..
32 VnlpecuUe..
6i> Cygni
7 Equulei
I Cygni
r Cygni
a Cygni
a Cepbei
a Aquarii
i Pegasi
6 Pegasi
1892 Sept. 12.
/3 1 Cygni
7 Aqnilse
SSagittse
o Aquilae
Groombridge 1119 S.P
fl Aquilse
B.A.C. 7014
p Capricorni
69 Aquilse
Bradley 2701
Bradley 2701.
Cygni
c Aquarii
15 Delpbini ..
fi Aijuarii
K Capricorni..
13-500
12-580
1 1 -004
13-500
20. 58. 3'10
3 '59
20. 59. 39-97
40-45
21. I. 50-74
50-85
21. 4. 52-59
52-90
21. 8. 7-53
771
21. 10. 1276
13-10
21. II. 41 '60
42-07
21. 21. 3-23
58-27
21.21. 5-54
59-64
21. 36. 24-98
25-41
21.38. 39-98
40*24
21. 40. 52'15
52*56
21. 47. 11-85
12*24
21. 47. 56*00
56-14
22. 0. 1-33
1*65
22. I. 45 -90
46*06
22. 4. 32-27
32-55
22. 6. 54*07
53-82
22. 1O. 48 30
48-69
22. 13. 0-38
0*77
13-500
io'o6o
8*033
13-500
13*500
'5"35o
13*500
15*141
18*857
13-500
18-38
55H3
577
7-76
22*66
27 '99
56-80
13*42
13-42
40-63
55-38
77
27-38
11-25
16-86
l- 43
47*66
9-00
3-89
15-87
'9-35-
58-25 58-55
13-83
19. 40.
54-14 54-47
9-61
19. 45.
'7'40, '774
33-00
20. n.
26-63 2 7'7
42-27
20. ii.
50-64
51-08
6-34
20. 23.
47*28
47-68
2-79
20. 27.
49*88
50-21
5-48
20. 33.
26*94
2573
40-68
20. 33 .
28-26
26-69
40-68
20. 49.
4378
43'95
59' 6 5
21. I.
50-08
50-18
5-76
21. 4.
51-92
52*20
7*76
21. 8.
6*87
7-03
22*65
21. 10.
15-24
'5'35
30-99
21. 12.
5678
56-88
12-69
21. 15.
47-20
46-97
2-40
22. 0.
0-95 1-27
16-86
22. I.
45-62 45-81
'"43
22. 4 .
31-86 32-15
47*66
19. 26.
19. 40.
19. 42.
19. 45.
19. 48.
20. 5.
2O. 17.
2O. 22.
20. 23.
20. 33.
20. 33.
20. 37 .
20. 41.
20. 44.
20. 46.
21. 36.
6-95
52-48
19-26
'572i
0-58
28-91
347o
27-22
45"42(
28-46
28*79
3'53
35''3
'4'39
35*11
23-39
7'33
53-16
19-81
16-42
49'77
29-76
3V45
28-33
46-30
23-70
24-39
30-58
36*17
15-09
36-14
24*58
23-79
9-56
36-3 1
32-95
I2"OI
46*25
51*89
4472
278
40*28
40*28
46-98
52-35
31-26
52-32
40'6l
4-79
14-98
14-92
14-86
I4-95
14-89
'473
15-15
13-78
15-22
15-14
15-14
15-14
15*11
15*21
I5-37
15-11
15*18
15-20
15-10
15-28
15-14
15-26
15*20
15-26
15-11
15-27
'4'95
'3 '99
15-70
15-58
15-56
15-62
15-64
15-81
'5 "43
'5"59
15-62
15-51
16-46
16-40
16-50
16-53
22-24
16-49
16-44
16-39
16-48
16*58
15*89
16*40
16*18
16*17
16*18
16*03
Greenwich.
'475
14*94
14-87
14-81
14-90
14-84
14-68
15*17
15-09
15-08
15-08
15-05
15-15
15-31
15-05
15-12
15*14
15*04
Bradley 2993 W
Bradley 2993.
T) Aquarii
n Pegasi
r 2 Aquarii
\ Aquarii
8 Aquarii
/3 Pegasi
o Pegasi
58 Pegasi
7 Piacium
Bradley 3147.
Bradley 3147.
22 Piscium....
ID Piscium
30 Piscium....
2 Ceti
33 Piscium....
Greenwich.
15*26
15-12
'5-23
15-17
15-23
15-08
15-24
15*66
'5"54
15-52
15-58
15*60
15-77
'5'53
15*56
'5 "45
( Cepliei
Bradley 2993.
Bradley 2993.
TJ Aquarii
r, Pegasi.
H Pegasi
A Aqurtrii
S Aquarii
/3 Pegasi
a Pegasi
Aquarii
7 Piscium
Bradley 3147.
Brail ley 3147.
30 Piscium
33 Piscinm....
a Andromeda
Greenwich.
16*44
16*38
16*48
16*51
16*47
16*42
16-37
16-46
16*37
16-15
16*14
16*15
'5 '99
i Pegasi
J Capricorni ..
/t Capricorni. .
45 Aquarii....
7 Aquarii
Bradley 2993.
Bradley 2993.
/8 Pegasi
y Piscium
v Pegasi
Bradley 3147.
7 Cephei
22 Piscium....
01 Piscium
30 Piscium....
2 Ceti
14-034
22. 21. 48-04
43'59
16*640
22. 21. 47'62
43-89
13-500
22. 29. 35-80
36-17
22. 37- 43" 61
4379
22. 43. 40-05
40-50
)
22. 46. 46*26
46-68
J J
22. 48. 42-72
43''9
.
22. 58. I9'58
.9-78
) >
22. 59. 10'l8
10-46
9 J
2 3 . 4. 22-44
22-76
23. II. 21 "60
21 95
II*948
23-27- 5''35
46-20
10-366
23. 27. 54-69
48-56
13*500
23. 46. 13-30
13-60
>
23- 53- 33-05
33-32
23. 56. 12-47
12-82
( }
23. 57. 59-82
0*24
23. 59. 35-62
35^7
W
9
w
IO
E
10
E
9
E
9
E
9
E
9
E
9
E
5
E
5
E
9
E
9
E
IO
W
IO
W
9
W
9
W
9
13-500
14*180
22. 6. 53*51
22. 21. 46*50
53-37
42-94
16-570
13-500
22. 21. 46*06
22. 29. 35-31
43-22
35-69
,,
22. 37. 43-27
43-5
i
22. 44. 34-37
22. 46. 46*06
22. 48. 42-56
22. 58. I9'42
46-48
43-02
ig-te
VI
22. 59. 9*89
IO"2O
ii
11-989
23. 8. 30*99
23. ii. 21*16
23. 27. 48*37
31-40
21-53
44*41
"759
13-500
23. 27. 50*62
23. 56. 12-15
45-68
,,
23- 59- 35'4o
3575
"
o. 2.35-03
35*20
13-500
11-087
11-123
13-500
12-730
13*500
21. 38. 38*44
21. 40. 50-44
21. 47. 10*18
22. 12. 58*65
22. 15. 50*29
22 21. 50-44
22. 21.
22. 58.
23. II.
23. 19.
23. 28.
23. 34.
23. 46.
23- 53-
23. 56.
23- 57*
53-33
17-92
19-52
44-99
0*50
45*98
11-56
3I-35
10*66
58-01
39-19
51*56
11*28
5975
51-21
40*62
42-79
18-30
'9'95
45*46
45*96
43*01
12-36
32*09
11*59
59-11
59-08
59*08
51 '06
58-87
55'3 6
''59
58-04
34-79
25*42
3779
36*69
28*73
48-51
27-99
'5'33
51-13
8-99
59-02
59-02
51 -06
58-87
49 '9 3
i -60
58-05
34-80
25'43
46-44
36-69
2*38
28-OO
5I*I4
50-85
7-68
27'37
15-89
7'37
58-76
58-76
34'8i
36-71
1-90
2'55
59-48
2877
48-56
28*04
>5'39
1 5 '49
15-19
14-89
15-08
14-86
14-91
>4-85
15-01
14-96
15*03
1474
1615
'379
15-13
15-19
15-17
15-09
15-16
15-62
1 6 -08
15-80
I5-37
'5'37
15-30
15-12
15*03
15*14
15-23
15-04
15-16
'7*97
1 6 70
15-50
'5'39
15-65
16-17
l6'12
16*09
16*14
16-16
18-14
I5-97
16*51
16*76
16-44
16-59
16-47
16-31
16*47
16-45
16*28
STAR TRANSITS OBSERVED BY MR HOLLIS WITH TRANSIT E., AND RESULTING CLOCK ERRORS.
OBSERVATIONS AT GREENWICH.
66
Star's Name.
1892 Se.pt. 13.
E
E
E
E
E
W
w
w
w
w
w
\v
w
w
w
w
> 3 Aquarii I W
u Pegasi IW
1892 Sept. 14.
8 Pegasi
f Cephei
8 A([iiarii
45 Aquarii....
Bradley 2993.
Bradley 2993
17 Aquarii
T) Pegasi
H Pegasi
\ Aquarii
5 Aquarii
J3 Pegasi
a Pegasi
58 Pegasi
<> Aquarii
7 Piscium ...
Groom bridge 1 1 1 9 S. P
Aquila;
o* Capricorni
a 2 Capricorni
a Capricorni
3'- Capricorni .;
B.A.C. 7014
p Capricorni
69 Aquilte
Bradley 2701
Bradley 2701
75 Draconis
15 Uelphini
^ Aquarii
32 Vulpecul-B
61- Cygni
y Equulei
C Cygni
a Equulei
30 Capricorni
a Cygni
i Capricorni
Groombridge 3548 .
1892 Sept. 15.
32 Vulpecula;
21 Capricorni
S Capricorni
61' Cygni
27 Capricorni
y Equulei
T Cygni
30 Capricorn!
Groombridge 3548 ,
Gioombridge 3548.
$ Cephei
Capricorni
7 Capricorni
K Capricorni
f Pegasi
S Capricorni
16 Pegasi
29 Aquarii
13-500
11-518
11-634
13-500
14-079
13-500
i5'993
17*194
17*760
13-500
9
9
9
9
9
10 i 12*024
W
W
W
\v
\v
w
\v
\Y
\V
E
E
E
E i
EJ
E
El
E
E
6 ! 13-500
6 ,,
9
9 i
9
8
8
5
10
15-106
16-169
13-500
Observed
Tranit.
5
c
h in B
22. 4- 3'S
22. 6. 52*52
22. 10. 53-43
22. 12. 5 8 '66
22. 21. 47-97
22. 21
22. 29,
22. 37,
22. 44
22. 46,
22. 48
22. 58
22. 59
23. 4
23. 8
23. II
23. 13
23. 19
50-09
33'5 8
4'74
3275
44-07
40-42
1771
8-28
20-63
29*20
19-46
6-25
44-76
31-09
52-44
54'H
S9'42
42-81
44-21
34-16
42-05
33-12
447"
41-13
18-04
874
21*14
29-84
20'02
6-9!
I45">5
47^5
8-94
10-86
15-87,
58-67
58-67
51-07
58-87 i
49 "94
I -61
58-06
34-81
25 '45
37-81
46"47
367' |
23 '4 '
i -90
19.48.
20. 5.
2O. II.
2O. II.
2O. 12.
20. 14.
20. 17.
2O. 22.
2O. 23.
20. 33.
20. 33.
20 34.
20. 44.
2O. 46.
20. 49.
21. I.
21. 4.
21. 8.
21. IO.
21. II.
21. 9i.
2!. 15.
21. 21.
18-92
28-44
24-40
48-27
5 4 '45
41-31
34"i3
27-01
45-04
25-52
48-56
13-90
3476
42-41
48-69
50-51
5 '3'
10*64
39'34
S5'53
59'45
0-39
48-23
29-05
25-11
48-98
55-22
42-04
34-69
2777
45-61
23-11
14-60
46-23
42-21
6-28
: 12-31
59-18
51-87
44-70
2-73
40-05
23-18
46-22
'4'45
35-50
42-81 ;
48-97
51-09
5-69
II -02 !
40*16 .
55*80 i
0-26
53-15
40*05
2-14
31-24
5-69
7'72
22'6o
27'95
5677
12-62
16-84
11*96
20. 49. 41-94
2. 54- 3'74
20. 59. 37-14
21. I. 48-43
2i- 3- 7 '34
21. 4. 50-07
21. 10. 13-70! 13-79
21. II. 38731 39-34
21.21. 3-!-' 55-15
42-15
32-'5
3775
48-51
7-98
50-45
21. 21. 3-64
21. 27. 2-36 i
21. 30. 47-23
21. 33. 51-58
21. 36. 22 -94
21. 38. 37-76
21. 40. 50*13
21.47. 53'86
21. 56. 17*28
56-56
I"59
47^2
23*62
38*20
5079
54-16
'7'94
59'57
49-85
55'38
5-68
25-41
77
30-91
56*76
n-68
n-68
18-32
4'95
9'37
40-59
55'34
7-67J
1 1 "2 1
3478
16-56
16-50
16-72
16-25
15-86
14-46
16-91
I6-82
16-82
16*90
16*93
16-77
1 6*7 1
16-67
16-63
16*69
16*49
16-75
26-37
17-18
17-10
17*30
17*09
17*14
17-18
16*93
17*12
16*94
16*87
15*92
16*79
16*81
16*76
16*72
16-63
16-91
16*93
16*61
16-82
16-58
17-42
17*50
17*63
17*17
'7"43
17*26
17-12
17*42
16-53
15-12
16*73
17*03
17*13
16-97
17-14
16-88
17-05
16-84
-
Star's Name.
Greenwich.
16*52
16-45
16-67
l6'20
16-86
1 6 77
16*77
16-85
16-88
16-72
1 6 -66
16-61
16-57
16-63
16-43
i6'6g
K Pisciura W
Bradley 3147 W
Bradley 3147 E
i Piscium K
20 Piscium E
21 Piscium E
22 Piscium... .! E
to Piscium
Bradley 1672 S.P.
13 Ceti
15 Ceti
a Cassiopeise
Ceti
58 Piscium
5 Piscium
2 Ursse Minoris....
2 Ursse llinoris.... .. W
Greenwich.
17*16
17*08
17-28
17-07
17-12
17-16
16*90
17-09
1676
16-78
16-73
16-69
16-60
16-88
16-90
16-58
16*79
16*54
Groombridge 3548 .
K Caprioorni
Pegasi
S Capricorni
Bradley 2993
r 2 Aquarii
^ Pegasi
S Aquarii
Pegasi
a Pegasi
c 2 Aquarii
58 Pegasi'.
Bradley 3147.
Bradley 3147.
19 Piscium....
20 Piscium ...
21 Piscium
22 Piscium
2 Ceti
33 Piscium....
Greenwich.
"7 '39
17-47
17-60
17-14
17-40
17-23
17-09
7-39
16-99
17-09
16-93
17*10
16*84
17*01
i6'8o
35 Aquarii .
CCepliei
e Aquarii
Bradley 2993.
Bradley 2993
7j Aquarii
CPegari
) Pegasi
T a Aquarii
20 Piscium
21 Piscium
33 Piscinni
a Andromeda
Bradley 1672 S.P.
Bradley 1672 S.P.
13*500
14*228
15707
13-500
11*820
13-500
10*956
12-639
11*078
13*500
12*897
13*500
13*500
14-154
15-490
13-500
13-500
1 1 -067
11-488
13-500
13-440
10-710
Observed
Transit
S*
h m s
23. 21. 9*09
23- 2 7- 55'37
23. 27.
23- 34.
23. 42.
23- 43
23. 46
23- 53'
o. 13
o. 29
o. 32
o. 34
o. 37
0.41
0.42
0.54
53-90
9-24
9-07
41-24
1 1 "60
3 ' '44
30-91
27-07
18-85
9-08
5572
8-95
50-28
1-86
o. 54. 4*43
21. 21.
21. 36.
21. 38.
21. 40.
22. 21.
22. 43.
22. 44.
22. 46.
22. 48.
22. 58.
22. 59.
23- 3-
23. 4.
23. 2 7 .
4* 4 I
22'9O
37^2
49-99
46-71
37-82
3 2< 59
44-19
40-64
I7-57
8-07
26-84
20-45
52-68
23. 27. 52-22
23. 40. 37-83
23.42. 879
23.43. 41-07
23. 46. 11*48
23- 57.57'96
23- 59- 33' 8 3
22. I. 44*00
22. 2. 49 '04
22. 4. 30*34
22. 6. 52*05
22. IO. 53*29
22. 21. 45-88
22. 21.
22. 29.
22. 35.
22. 37.
22. 43.
23. 4 2.
23-43-
23. 59.
O. 2.
o. 13.
48-36
33"i7
49'37
4-"35
37 '47
8-44
40*60
33^5
33'4i
24-91
9*66
47-I9
4670
9-84
974
41-88
12*22
32*03
46*62
2774
I9-50
9*04
56*52
9*50
50-86
56-56
58 - 39 i
26-48
2-56
2-56
26*39
26-II
5^35
2878
48*57
57'37
44-06
3579
2575
12-99
26*02
7'33
15*24
56-23
23-67
38-44
50-74
40-58
38-54
32-96
44-86
41*38
17*91
8-54
27-63
20-97
44'i7
44*69
4^73
I2'I2
58-78
11-96
4O"6o
55-35
7-68
58-56
55^8
49 '95
1-61
58-06
34-81
25'45
44-38
37-82
2'55
54-97
26-11
58-36
2879
15-41
51-21
o. 13. 27-8
44 "3 i
49-72
30-81
51-84
53-88
40*56
42-32
33-64
49-75
4f53
38-05
8-93
41-06
33-86
33*61
42-46
1-40
6-60
47^5
8*92
10-86
51-07
7-11
58*87
55'27
26-12
58-37
51*20
50-93
57''7
43-55 57''7
8
I6-82
'4'37
15-86
16-55
16-37
16-47
16-56
16-54
16*75
16*32
16*29
16*69
.16*47
16*52
16*47
18*68
16-85
'573
16*93
16*91
16-94
17-98
16-84
16-99
1675
16*68
16*90
16*91
1675
16-85
18-38
17-86
16-50
16-63
16-63
16-67
16-63
16-67
17-09
16-88
16*84
17*08
16*98
17*87
I(>'I I
'7 "43
17-36
7-34
17-22
17-19
17*31
'7'34
17-32
16-71
13-62
SrS>
.*! --3
*w
1676
16*49
16-31
16*41
16-50
16-48
16*25
16*22
16-62
16*40
16-45
16*40
16*89
16*87
16-90
16*79
16-94
16-70
16-63
16-85
16-86
16-69
16*79
16-44
16*57
16-57
16-61
16-56
1 6 '60
17-05
16-84
16-80
17-03
16-93
17-38
17-31
17-29
17-17
17-13
17*25
17-27
17-25
GREENWICH OBSERVATIONS, 1892.
66
TELEGRAPHIC DETERMINATION OF LONGITUDE.
Star's Name.
Observed
Transit.
3 52 d
si-; -ss^s
Star's Name.
1892 Sept. 16.
\ Ursse Minoris.
\ Urss Minoris
/Sagittarii
8 Cygni
a Aquilse
Groombridge 1119 S.P
a 1 Capricorni
a 2 Capricorni
S? Capricorni
Bradley 2701
75 Draconis
r h in *s 8
13*664 ' 19. 31. 31-68 2"io
12*075
13*500
14-784
13-500
13-304
11-883
19. 31.
19. 39.
19. 41.
19.45.
19.48.
20. ii.
2O. 12.
2O. 14.
20. 33.
20. 34.
35'4
47-60
20-17
14-85
21-73
24-07
48*13
4 '9 3
25-92
4773
2-34
48-43
20-23
15-40
55-00
24-83
48-89
4171
2279
44-60
14-27
14*27
6-19
37-60
32-90
17*33
42-19
6-26
59*16
39'79
12-17
11-93
1776
'7'37
17-50
22-33
17-36
I7-37
'7'45
17-00
17-28
Greenwich.
1774
17*35
17-48
'7'34
'7'35
17*43
Cygni ........
u. Aquarii ......
32 Vulpeculfe
r Cygni .........
a Cephei .......
i Pegasi ........
Bradley 2993.
Bradley 2993.
13
15
Observed
Transit.
'500 20. 41. 34*87
20. 46. 34-37
20. 49. 41-91
21. IO. 13-40
21. 15. 45-35
21. 59. 58*99
22. I. 43*78
'231 ! 22. 21. 45'8l
9 j 16*789 22. 21. 45'i8
*
ISI
O QM
35-12
35-09
4 2-24
'3'59
44-88
59'63
44-14
38-78
38-87
52-28
59'5 6
30-90
2'22
16-85
I '40
17-41
I7-I9
17-32
I7-3I
'7'34
17 "22
17-26
19-42
17-38
17-16
17-29
17-28
17-30
17-18
17-22
XIV. MEAN CLOCK ERROR.
Forming now the means of column 8 in the preceding pages for each group of
clock stars observed between reversals of the instrument, we get the results shown in
the tables on pages 68 to 72. The first five columns require no explanation. In the
sixth column the results of columns 4 and 5 are corrected for systematic difference
between the two positions W and E. To obtain this correction, the means of the
various groups were all reduced to the same sidereal time with clock j:ates generally
agreeing with those on page 73. The means of the results W and E were then taken,
weighting according to the number of stars in each group, and the differences of
these means formed for each day. These differences are given in the, following table ;
and assigning weights to them by the formula , where m and n are the number
of stars observed W and E respectively on each day, the mean differences are
found :
CLOCK KRROK.
67
Clock Slow W Clock Slow
Date.
1892.
Transit D.
Transit K.
Date.
1892.
Transit D.
Transit E.
W E.
Weight.
W E. Weight.
W E.
Weight.
W-E.
Weight.
Water Me. Greenwich.
Montreal. Waterville.
s
s
K S
Apr. 18
Aug. 1 6
+ 0-02
I 1
'9
...
+ 0-09
18 (+0-45)
...
+ 0-30
12
21
+ 0-07
8
'9
. ..
+ 0-04
4
22
+ 0-02
7
+ O - I5 12
20
-0-13
9
...
23
0'2O
7
+ 0-37 2
22
-0-15
'3
25
+ 0-29
10
23
0-07
5
26
0'06
10
+ 0-30
9
24
0-04
5
2 5
+ 0-07
10
28
+ o - o6
9
. ..
29
-0-13
8
30 0-40 9
Greenwich. Waterville.
(
Ganso. Greenieich.
May 5 +0-46
10
0-08 9
6 +0-32
9
0-07
6
Sept. 3
O'l I
2
7
+ O'2I
8
4
4-0-09
8
0-03
7
9
+ 0-05
9
+ 0-30
1 1
5
+ 0-31
17
10
-t-o-o-
10
6
+ 0-27
9
1 1
4-o'i2
8
7
O'OI
10
+ 0-26
16
12
+ 0-04
7
...
8
-0-08 1 8
+ 0-39
'4
13
+0-06
7
9
0-04 13
15
+ 0-05
4-
10
+ 0-16 2
1 1
o'oo 3
1
12
-0-32 4
+ 0-29
12
'3
O'lO
'7
+ 0-29
4
'4
+0-04
16
+ 0-27
7
'
'5
0-05
6
4-0-35
'4
16
+0-19
6
...
...
Weighted Mean
o-oio
235
+ 0-205
256
Transit D. After the observations on May 6, the lenses of the object-glass were thought to be loose. The holding
ring and screws were tightened before May 9.
Aug. 1 8. See note page 13. The value on this night has not been used in forming the mean.
Transit E. The lenses of the object-glass were separated and re-adjusted between May and August in the course ot
the determination of the Paris Greenwich Longitude.
For Transit D a correction of +0 8- 01 has been applied to W groups, and 8- 01
to E groups, in forming the numbers in the sixth column. For Transit E 8> 10 has
been applied to W, and +0 B- 10 to E groups. The daily mean of the groups is now
formed, and the difference of each group from the mean given in column 7.
68
TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH-
CANSO MONTREAL, MADE IN 1892.
Clock Error found by Mr Turner with Transit D.
-\VATERVILLK
Date
1892.
Meun B.A.
of Group.
Number
of Stars, j
Mean Clock
Error.
Corrected.
Difference
from Mean.
Date.
1892.
Mean R.A.
of Group.
Number
of Stars.
Mean Clock
Error.
Corrected.
Difference
from Mean.
W.
E.
W.
E.
Apr. 22
Apr. 23
Apr. 26
May 5
May 6
May 9
h m
9 58
10 52
ii 56
Water
5
7
3
vtile Ck
6*46
6-80
ck.
s
6-58
s
6-47
6-57
6-81
s
0-12
- 0-02
+ 0-22
o-oi
-f O-O2
- 0-05
O'O2
O-o6
+ o- 16
+ 0-29
0-04
-r-o- 16
-0-32
o- 16
+ o- 1 1
0-27
-f-o- 18
+ O-QI
-f 0-06
0- I I
0-06
May 10 :
May 1 1
May 1 2
Aug. 17
Aug. 1 8
Aug. 20
Greenwich C
Ii in '
1151 6
12 32 5
3 7 5
13 29 4
lock. c
s
44' 2 7
44 -i 3
ontinued.
s s
44-21 44-20
44-28
44-15 44-14
44-24
s
O'OI
+0-07
0-07
+ 0-03
+ 0-09
10 47
8,7
6-585
12 40
9. "
44-213
10 37
12 49
10
5
9- 10
9-09
9-08
9-11
12 31
12 46
13 8
'3 37
6
3
4
4
4-I--57
44-49
44-45
44-38
44-58
44'H
44-50
44' 37
II 21
5, 10
9-090
+ 0-01
10 16
10 52
12 17
H 35
6
7
4
15-88
15-87
15-93
16- 1 1
15-89
15-92
15-88
16- 10
+ o- 18
+ 0-04
0-07
-f-o-oi
12 58 10,7
44-487
12 5
12 31
12 47
13 3
i
5
5
3
8,6
44-60
44-57
44-76
44'5'
44-75
44-61
44-50
44-58
12 I
10, I O
I5-938
12 35
13 8
13 3i
15 o
Green
6
3
4
7
uric/i. Cl
43'5
43-37
)ck.
43-I9
42-9I
43'5'
43-18
43-38
42-90
12 4 2
44-574
20 32
Montreal. Clock.
4 63-26 ' 63-27
13 4 2
10, 10
43-221
20 32
4 | 63-270
+ 0-60
-1-0-07
+0-14
0-40
ii 48
12 3
12 23
12 37
6
3
2
6
43-66
43-73
43-4I
43-3
43-40
43-67
43-29
43-74
18 39
19 16
19 36
20 1 6
20 44
5 60-84
3
i 60-38
7
3 60-03
60-33
59-86
60-85
60-32
60-39
59-85
60-04
12 14
9,8
43'55:>
+0-24
-0-08
0-07
>9 43
q, 10
60- 246
II 58
12 32
13 6
'3 35
4
8
4
3
44-16
44-04
44-I3
44-01
44-12
44-I7
44-00
44-05
18 36
19 58
20 38
4
9
4
53-52
53-86
53-55
53-85
53-53
53-54
12 42 11,8
44-105
I 9 4 8
9,8
53-608
1
CLOCK ERROR.
69
GlocJc Error found by Mr Turner with Transit D. continued.
Date.
1892.
Aug. 22
Aug. 23
Aug. 26
Aug. 28
Aug. 29
Aug. 30
Sept. 3
Mean R.A.
of Group.
Number
of Stars.
Mean Clock
Error.
Corrected.
Difference
from Mean.
Date.
1892.
Mean R.A.
of Group.
Number
of Stars.
Mean Clock
Error.
Corrected.
Difference
from Mean.
W.
E.
W.
E.
I
h m
'7 55
18 32
19 9
19 42
Montreal C
4
7
I
loch. c
8
47-80
47-62
ontinue
s
47-93
47-66
a.
s
4^-81
47-92
47-63
47-65
8
+ 0-07
-f-o-lS
o- 1 1
0-09
+ O-O2
O-O2
+ 0-23
0-04
-0-I 3
+ 0- 10
0-09
Sept. 4
Sept. 7
Sept. 8
Sept. 9
Sept. 10
Sept. 1 1
Sept. 12
h m
18 59
19 43
2O 12
20 41
(Janso Clo
6
6
3
ck. coi
s
50-52
50-54
itinued.
s
5'37
50-41
3
50-36
5-53
50-40
50-55
s
0-07
+ o- 10
0-03
+ 0- 12
O-22
o-oo
+ 0-18
-0-24
o-oi
+0-06
+0-07
+0-08
18 55
13, 13
47-74
I 9 48
6,12
50-433
18 27
! 9 5
5
5
44- $2
44-60
44' 6 3
44'59
18 7
19 12
2O 23
4
12
5
55-12
54-92
55-32
54'9'
55-13
55-3I
18 46
5,5
44-610
19 18
12,9
55''3i
20 20
5
34^4
34' 2 5
18 18
'9 43
20 24
20 56
21 33
7
5
7
'3
5
56-40
56-70
56-72
56-65
56-73
56-41
56-64
56-71
56-72
56-73
2O 2O
5
34-250
18 38
19 I I
I 9 42
5
8
6
27-86
27-50
27-61
27-87
27-60
47-51
20 15
19, 18
56-650
>
19 12
11,8
27-643
18 31
19 20
20 l6
20 58
7
6
7
7
58-00
58-14
57-92
58-20
57-91
58-01
58-19
58-15
o- 16
0-06
+ 0- 12
+0-08
0-05
+0-19
o-oo
20 18
20 47
21 10
7
6
4
24-20
24-41
24-27
24-40
24-21
24-26
O-O2
+ O-22
o- 27
+ 0-03
0-03
I 9 4 8
13, H
58-067
2O 41
6, ii
24-300
18 32
ig 26
4
i
59-44
59-22
59-21
59-45
! 7 59
19 48
20 47
2
9
7
20-99
20-74
21-25
2I-OO
2I-24
20-75
'8 43
i4
59-258
'9 59
9-9
21 -023
17 56
18 17
4
2
60-55
60-56
60-56
60-55
19 19
19 37
Cow
2
2
iso Cloc
48-68
fe.
48-77
48-76
48-69
o-oi
0-21
+0-16
1 8 3 4, 2
60-557
17 56
19 21
4
5
61-68
62-07
61-69
62-06
19 28
2, 2
48-725
18 43
4, 5
61-896
70
TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH WATERVILLE-
CANSO MONTREAL, MADE IN 1892.
Clock Error found, by Mr Turner with Transit D. continued.
Date.
1892.
Mean R.A.
of Group.
Number
of Stars.
Mean Clock
Error.
Corrected.
Difference
from Mean.
Date.
1892.
Mean RA.
of Group.
Number
of Stars.
Mean Clock-
Error.
Corrected.
Difference
from Mean.
W.
E.
W.
E.
Canxo Clock. continued.
Cunso Clock. continued.
h m s s 9 s
h in
S S 3 S
Sept. 13
1910 6 ' 62-82
62-83 O-2I
Sept. 15
' 57 7
65-42 65-41
o-oo
20 7 10 62-97
62-96 0-08
19 36 6
65-40
65-41
O-OO
''
20 45 10 163-08
63-09 +0-05
21 7 8 63-26
63-25
+ 0-21
19 15
6,7
1 65-410
20 22 l6, l8
63-044
Sept. 1 6
i 37 5
66-56 66-55
-0-15
Sept. 14
18 21 7 64-02
64-01
-0-17
'9 43
66 -79
66-80
+o- 10
19 5 7 64-09
64- 10
0-08
19 33 9 64-23
64-22
+0-04
19 '5 7,5
66-696
20 17
9 64-31
64-32
+ o- 14
I
19 24 16, 16
64-176
Clock Error found by Mr Uollis with Transit E.
Greenwich Clock. Greenwich Clock. continued.
Apr. 1 8
'3 34
4 40-20
40-10
Apr. 22
119 6
40-88 40-98
+ o- 10
1151 6
40-95
40-85
0-03
4
40-10
12 34
6
40-69 40-79
0-09
13 10
3
40-94
40-84
0-04
13 53
4
40-85 40-95
+0-07
Apr. 1 9
10 54
ii 49
3
4
40-24
40-28
40-14
40-38
o- 16
+ 0-08
12 20
9, 16
40-879
12 32 6 40-40
40-30
o-oi
'3 '9 3
14 i o i 40-44
40-27
40-37
4'34
+ 0-06
-1-0-04
Apr. 23
12 2
I* 37
2
2
41-41
1
41-041 41-14
41-31
0-09
+0-08
12 17
10, 7
40-305
12 19
2. 2
41-225
Apr. 2 1
II 48
5
40-96
! 40-86
0-06
Apr. 25
+ 0-06
II 48
7
41-66
41-56
12 41
2
40-94
41-04
+ 0- 12
12 39
6
41-39 41-49
o-oi
13 10
3
40-95
40-85
0-07
,3 6
2
41 -60
41-50
o-oo
H 7
6
40-87
40-97
-1-0-05
13 29
5
4'"33 4''43
0-07
I 3 2
8. 8
4C- 9 22
12 36
9, "
41-501
CLOCK ERROR.
Clock Error found by Mr Hollis with Transit K. continued.
71
Date.
1892.
Mean K.A.
of Group.
Number
of Stars.
Mean Clock
Error.
Corrected.
Difference
from Mean.
Date.
1892.
Mean R.A.
of Group.
Number
of Stars.
Mean Clock
Error,
t
Corrected.
Difference
from Mean.
W. E.
W.
E.
Apr. 26
Apr. 27
May 5
May 6
May 7
May 9
o
h m
II 48
12 4!
13 I'
13 34
reenwich (
4
7
4
2
llock.
s
41-63
41-67
contimif
s
4i-3i
41-52
id.
s
4I-53
41-41
4I-57
41 -62
8
+ 0-03
0-O9
+ 0-07
+ 0- 12
o-oo
O-26
+ 0-16
O-05
+ 0-13
+ O-O2
4-0-16
o- 14
0-04
+0-03
0-06
o-oo
0- II
+ 0-05
0-03
May 1 1
May 13
May 15
Aug. 1 6
Aug. 1 8
Aug. 19
Aug. 22
ff
h m
14 50
'aterville (
2
Sock
8
continued.
S 1 S
49-76 49-86
s
o-oo
o-oo
o-oo
o * 06
14 50
2
49-860
16 18
17 24
7
8
54-70
54-50
54-6o
54-60
12 42
8,9
41-501
'4 47
5
41-76
41 -66
16 53
8,7
54-600
H 47
f
3
41 -660
15 42
16 15
17 i
2
3
5
59-82
59-86
59-76
59-72
59-86
59-76
ii 14
ii 51
12 44
13 9
13 29
JFato
4
6
4
2
3
oille Cl
35-38
35-59
35-66
oc,k.
35-60
35-57
35-28
35-70
35'49
35-67
SS-S 6
+0-08
0-02
16 31 7,3
59-782
19 5
20 34
21 43
22 36
Watei
8
7
4
3
ville Clock.
146-09
46-31
^46-38
46-41
46-19
46-21
46-48
46-31
12 27
11,8
35-542
0-05
+ 0-22
+ 0-05
ii 8
ii 53
12 29
'3 37
4
5
i
4
37-9 6
38-13
38-06
37-86
38-16
37-86
37-96
38-03
20 31
10, 12
46-257
18 35
19 17
20 4
21 53
4
6
9
2-96
3-20
2-94
2-95
2-86
3-04
3-10
3-05
12 16
9, 5
38-001
-0-17
+ 0-01
+0-07
-|-0-O2
ii 54
12 37
'3 7
13 34
5
5
i
8
40-64
40-59
40-50
40-55
40-54
40-60
40-49
40-65
2O 20
10, 14
3-029
21 23
22 41
5
3
5-28
5-37
5-i8
5-47
12 51
6, 13
40-599
o- ii
4-0-18
I 2 2O
13 13
13 33
14 41
i 45-59
4
3 45-67
5
45-39
45-48
45-49
45-49
45-57
45-58
21 59
5, 3
5-289
+ 0-05
+ 0-06
20 46
4
11-18
ii -08
13 12
'3,9
45-52I
2O 46
4
1 1 -080
The Waterville Clock (Dent 2016) appears to have dropped 12 seconds between August 16 and 17. It was put forward i minute before the
observations on August 18.
7S
TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH WATERVILLE
CANSO MONTREAL, MADE IN 1892. ,
Clock Error found by Mr Hollis with Transit E. continued.
Date.
1892.
Mean R.A.
of Group.
Number
of Stars.
Mean Clock
Error.
Corrected.
Difference
from Mean.
Date.
1892.
Mean R.A.
of Group.
Number
of Stars.
Mean Clock
Error.
Corrected.
Difference
from Mean.
W.
E.
W.
E.
Aug. 24
Aug. 25
Sept. 4
Sept. 5
Sept. 6
Sept. 7
w
li in
'9 5
19 43
aterville C
9
3
lloc.k.
s
I5-74
sontinue
s
15-73
)d.
s
15-64
I5-83
s
0-05
+ 0-14
0-03
+ 0-04
o- 1 1
+ 0-15
+ 0-05
+ 0-06
+ 0-02
-0-I 3
O'O6
+ 0-03
O-O2
+ 0-08
+0'04
+ 0-06
Sept. 8
Sept. 12
Sept. 13
Sept. 14
Sept. 15
Sept. 1 6
ffn
h m
20 2
21 29
22 52
xnwich Ct
10
9
3
ock. c<
s
15-63
15-51
mtinuet
8
15-22
15-20
I.
s
15-32
S"53
15-3
15-41
s
0-08
+ 0-13
o- 10
+ 0-01
+0-04
0-06
+0-04
o-oi
+0-04
0-04
+ o- 19
4-0-02
0-08
0- 12
+0-09
0-09
+0-03
19 15
9. 3
15-687
21 10
23 33
12
9
18- 17
17-90
18-00
18-07
21 50
13, i 6
15-396
19 58
21 24
23 35
8
10
7
16-46
16-46
16-16
16-36
16-26
16-36
22 I I
9, 12
18-030
22 58
2 3 59
Greenu
8
6
ich Clot
13-71
k.
13-77
13-61
13-87
21 33
15, 10
16-320
22 9
22 59
o 13
4
13
1 1
16-76
16-51
16-48
16-61
16-66
16-58
23 24
8,6
13-721
23 21
13, '5
16-621
20 O
21 I
21 36
22 54
'3
8
5
9
'4'43
14-40
14-24
14-05
I4-33
I4-34
14-3
14-15
20 15
21 3
22 33
2 3 4 8
8
10
1 1
6
17-13
16-86
16-76
16-62
17-03
16-86
16-76
16-72
21 13
18,17
14- 282
21 49
19, 16
16-843
22 53
o 20
7
1 1
I4-83
14-54
14-64
I4-73
21 2
21 5 I
23 S
8
12
8
'7-37
17-31
16-99
17-27
17-09
17-21
23 46 11,7
14-695
21 5
21 55
22 51
23 55
7
1 1
9
5
15-17
15-15
14-87
14-93
1
14-97
15-07
15-03
15-05
22 1
l6, 12
17-176
2O 19
13
17-37
17-27
22 19
16, 16
14-990
20 19
13
17-270
CLOCK RATE.
73
XV. CLOCK RATE.
From comparison of consecutive clock-errors thus determined, the rates of the
clocks in the interval have been deduced and are set down in the second and fifth
columns of the following table. The clock-rates adopted for each day given in the third
columns are in general the means of the figures preceding and following in the second
columns. In the case of the Sidereal Standard the rates as found from observations
with the Greenwich Transit -Circle have been added for comparison.
Date.
Sidereal Standard at Greenwich.
Date.
Dent 2016 at
Waterville.
Date.
Clock Howard at
Can so.
Date.
Ballou 102 at
Montreal.
I
from Star
Obs.
[ourly Rat
Adopted.
e.
from Ob-
servations
with T.C.
Hourly
from Star
Obs.
Rate.
Adopted.
Hourly
from Star
Obs.
Rate.
Adopted.
Hourly
from Star
Obs.
Rate.
Adopted.
1892.
s
s
1892.
s
s 1892.
s
s
1892.
s
s
April 1 8 i +0-009
April 22
+ 0-102 , S^pt. 3
+ 0-070
Aug. 17
0-129
April 19
+ O'01 I
+ 0-006
23
+ 0-102
+ 0-098
4
+ 0-070
+ 0-068
18
0-129
0-134
21
-p w Wi J
O-OO2
+ 0-006
+ 0-006
26
+ 0-094
+0-094
7
+ 0-066
+ 0*064
20
-0-139
0-132
22
+ 0-006
+ 0-008
8
+ 0-061
+ 0-06 1
22
0-125
0-128
23
+ O-OI4
+ o"oo6
+ 0-010
+ 0-010
May 5
+ 0-103
9
+ 0-060
+ 0-056
23
0-131
0-136
*5
O'OOO
+0-003
+ 0-008
6
+ 0-I03
+ 0-105 10
+ 0-052
+ 0-054 z6
0-140
0-141
26
+ 0-006
+0-003
+ o'oo8
7
+ 0-106
+ 0-104 I]
+ 0-056
+ 0-055
28
0-142
-0-137
27
+ 0-006
+ 0-007
9
+ 0-102
+ 0-095 12
+ 0-054
+ 0-050
29
0-131
0-136
May 5
+ 0-009
+ 0-006
+ 0-087
+ 0-045
0-141
+ 0-009
1 1
+ 0-091 13
+ 0-047
3
0-141
6
+ 6"oio
+ 0-009
+ 0-095
+ 0-049
+0-010
' 13
+ 0'I02
'4
+ 0-051
9
+ 0-008
+ 0-008
+ 0-I09
+ 0-052
+ 0-005
15
+ 0-109
'5
+ 0-053
10
+ 0-008
+ 0-008
+0-054
+ O'OI 1
16
+ 0-054
ii
+ 0-008
+ 0-008
+ 0-004
Aug. 1 6
+ 0-100
12
+ 0-004
+ 0-008
+ O'IOO
Sept. 4
+ 0-026
+ 0-026
+ 0-023
18
+0-088
+ 0-094
5
+ 0-0 1 6
+ O'O2I
+ O'O2I
.'9
+ 0-082
+ 0-085
6
+ 0-015
+ 0-013
22
+ O'OI5
+ 0-099
+ 0-091
7
8
+0-015
+ 0-017
+ 0-014
+ 0-OI3
+ 0-OII
+ 0-087
+ 0-093
+ 0-087
+ 0-010
12
l + o-oi i
+ o'oo8
+ 0-012
13
+ Q-OII
+ 0-015
+ Q-OIO
14
+ 0-012
+ O-QI 3
+ 0-014
15
+ 0-009
+ 0-005
+ 0-004
16
+ O-OO4
+ 0-013
GREENWICH OBSERVATIONS, 1892.
74 TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH WATER VILLE
CANSO MONTREAL, MADE IN 1892.
XVI. OBSERVATIONS MADE WITH TRANSIT B.
This section refers exclusively to observations made by Professor M c Leod. The
description and reduction of the observations have been supplied by him.
All transit observations were recorded by a break circuit telegraph key on a cylinder
chronograph. The instrumental equipment is described, and the constants employed
are given under paragraphs IV., V. and VI, pp. 6 and 7.
In April and May, at Hazel Hill and Montreal respectively, all stars were observed
on the fixed wires of the reticule at a constant setting of the micrometer head, and there
were no supplementary observations of polar stars for independent determination of
azimuth. In August and September, at Greenwich and Waterville, several polar stars,
in addition to those regularly observed as time stars, were observed each night for
azimuth by using the micrometer-screw to obtain extra-meridional settings to be reduced
to the middle wire. The stars were observed in groups with the micrometer West or
East, and each group has been reduced independently by the method of solution of
equations of condition, as explained in a later paragraph, to determine the clock error
at the mean of the times of the observations of the group.
Collimation. The collimation error used was found from comparison of the
equations of condition of observations made in the two positions of the instrument,
Micrometer West and Micrometer East. This error was also determined by observation
of the Nadir, and from polar stars observed in both positions at the same transit. These
values are given in the following table of errors, but have not been used in the reduction
of the observations.
In the few instances in the first part of the work in which the collimation error was
determined by reversal on polar stars, the observations were made between groups, or
at the beginning or end of a night's work. In the former case, the stars are included
in the equations for both groups, but in August and September the stars so observed
have not been included in the equations from which clock errors have been
determined.
ERROR OF COLLIMATION.
75
Error of Collimation : Trans-it B.
Date.
Star.
Deduced Collima-
tion.
Adopted
from
Compari-
son of
Groups.
Date.
1
Star.
Deduced Collima-
tion.
Adopted
from
Compari-
son of
Groups.
Polar
Star.
Nadir
Observa-
tion.
Polar
Star.
Nadir
Observa-
tion.
Canso.
Greenwich.
1892.
s
s
s
1892.
s
s
s
April 19
O'OO
A"g. 1 5
0-19
-0-19
20
/? Ursse Minoris
O'OO
0-03
0-05
16
X Ursae Minoris.
O'2O
O'lQ
0-22
0-03
o'o 5
S
+ 0-03
18
Bradley 3147 ...
O'2g
O'22
Bradley 1672 S.P..
O'2O
0'24
2 I
+ 0-04
20
X Ursae Minoris.
O' 30
-0'24
-0-05
+ O'O2
-0'2 4
-0-24
24
ft Ursas Minoris
0-09
-f 0'02
21
-0-24
+ 0'OI
+ o'o8
Gioomb. 3548...
-O'Ji
O - 26
O'24
25
o'og
22
O'2|
4 Ursae Minoris
O'O2
O'I2
0-05
.
0-36
26
0-04
23
0'2I
-0'24
O'Og
+ 0-03
25
O'26
-0'25
26
-0-2 7
0'38
28
X Ursse Minoris.
0-25
-0'25
O'2J
Montreal.
-0'2 5
29
O'22
Bradley 2993 ...
0-30
__ O' 2 2
May 4
+ o'O9
-0'27
,
30
o'35
6
O'lO
-0-32
0-28
Ursae Minoris
O'lO
-0-14
0^7
9
0-13
Waterville.
igUrsae Minoris
-0-17
-OM3
-0-05
Sept. 6
0-14
0-16
10
o'o/
0-18
0-07
7
X Ursaa Minoris.
O'JO
0-13
-0-15
12
19 Ursse Minoris
O'2O
0-16
-0-17
-0-17
13
Bradley 2993 ...
-0-14
O'lO
-0-13
0-18
'3
4. H. Draconis ...
0-28
-0-27
4
0-18
-0-15
O'Zl
0-30
J
J
I c
0*14-
O'I2
'4
-0-33
OM9
0-17
-0-17
16
X Ursse Minoris.
O - 2I
O'lg
16
-0-27
0*17
o'ig
76 TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH WATERVILLE
CANSO MONTREAL, MADE IN 1892.
Level Error. The level of the instrument was determined several times during
each set of observations by the striding level, and generally near the beginning and end
of each evening's work by Nadir observations. The striding level was so constructed
(see Paris Greenwich Longitude Determination, pp. 116 and 117) as not only to be
capable of being used in the ordinary way but also it was fitted with the micrometer
devised by Mr Turner, and in all cases readings were made by both methods. The
axial adjustment was examined each evening, and the cross level carefully scrutinised
for all readings. The observed inclination values given in the tables are, as a rule, the
mean of four pairs of end readings and four micrometer settings. The values computed
from Nadir observations are given separately, and were obtained in each case from at
least five pairs of readings in each of the positions of the instrument. The adopted level
errors were obtained by plotting all observed values and drawing a smooth curve as
nearly as possible through them.
Transit, B.
Date.
Sidereal
Time.
Striding Level.
Adopted
Nadir. Level
Error.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
W
E
W
E
Canso.
Canso continued.
1892.
h m
3
s
8
a
1892.
h m
s
s
a
8
Apr. 1 9
14 18
+ 0-06
Apr. 20
13 54
O'05
0-06
H 3
+ 0-04
14 6
0-05
14 42
-f O'02
14 12
0-04
H 54
O'OO
O'OO
14 18
0-06
0-03
15 12
0-07
0-06
14 30
+ 0-02
O'OI
i; 18
o'04
0-03
14 42
O'OO
O'OO
15 30
+ O'OI
+ 0'OI
H 54
O'OO
15 36
+ O-QI
15 6
O'OO
O'OO
'5 4 8
+ o-oi
+ O'OI
15 18
O'OI
+ O'OI
16 o
0-05
15 3
+ 0'02
+ O-O2
16 36
0'O2
15 3
+ 0-03
16 54
O'OI
O'OI
Apr. 2 1
9 12
+ 0'OI
Apr. 20
6 o
-f- 0-03
9 12
+ O'OI
6 12
+ O'O6
ii 18
+ 0'03
O'OI
6 24
+ o-io
ii 36
O-OJ
0-05
12 18
0-07
o - o7
ii 48
O'O7
0-08
12 30
0-07
ii 54
O'l I
o'og
12 42
0x17
O'o6
12 6
0-09
13 o
0-02
0-04
12 18
0-08
0-07
'3 3
0-06
0-06
12 30
o'o6
'3 36
0*07
o'c6
12 30
O'O4
0-06
'3 4*
0-08
0-06
12 42
o'o6
ERROR OF LEVEL.
Transit B. continued.
77
Date.
Sidereal
Time.
Striding Level.
Nadir.
K
Adopted
Level
Krror.
Date. Sidereal
Striding Level.
Nadir.
Adopted
Level
Error.
W
E
W
E
Ganso continued .
Canso continued.
1892. h ill
H
8
B
i
1892.
h m
s
a
a
a
Apr. 21 12 54
0-08
o'o6
Apr. 26
I I 42
+ 0-14
+ Q-IZ
13 6
0-05
o'o6
ii 54
+ 0-05
+ OMI
13 36
0-I4
0-09
12
+ O'lO
+ O'IO
'3 42
O-IO
13 12
+ 0-13
+ 0-13
3 54
0-05
0-09
13 30
+ 0-15
+ 0-15
14 6
O'lO
0-08
I 3 4 8
+ 0-15
+ 0-17
14 12
0-07
-0-08
'3 54
+ 0-24
+ 0-18
14 18 .
0-O7
14 12
+ 0-19
+ O'2I
14 2 4
+ O'2O
+ 0-23
14 30
+ O-ig
+ 0-23
Apr. 24 14 12
+ '04
4-0-04
14 48
+ 0-24
+ 0-24
14 30
+ 0-04
H 48
+ 0-04
+ 0-04
H 54
O'O I
+ 0-04
Montreal.
,5 6
+ 0-07
+0-04
15 18
+ 0-07
+ 0-04
May 4
12 36
- 0-25
O'2O
15 30
O'OO
+ 0-03
12 54
0-16
O'2O
15 48
+ O'OI
+ 0-03
13 6
0-18
16 6
+ 0-04
+ 0-O2
13 18
O'2O
-0-18
16 18
+ 0'02
13 30
o"i6
0-18
16 30
-)- o-oi
+ 0-03
17 18
+ 0-04
May 6
13 36
0-03
o'o 3
17 24
+ 0-06
+ o"o6
13 42
+ 0-05
+0-05
i3 54
+ 0-05
+ 0-05
14 6
+0-05
Apr. 25
1 1 30
+ 0-09
14 18
+ 0'12
+ OM2
ii 48
+ - IO
+ 0'IO
14 24
+ O'll
+ O-I2
ii 54
+ o-io
+ 0'I I
H 30
+ O'lO
+0-10
12
+ O'I2
+ 0-1 1
14 42
+0-08
12 12
+ O'lO
+ 0'I I
H 54
+ O'O2
+0-04
12 30
-fO'IO
,5 6
+ 0-04
+0-03
12 54
+ 0-09
+0-08
15 18
+ 0-03
+0-05
13 12
+ 0-05
+ o'oy
15 24
+ 0'06
+0-07
14 12
+ 0-05
+ 0-06
15 36
+0-09
14 24
+ 0-08
4-0-07
'5 54
+ O'l I
+ 0'I I
H 36
+ 0-07
16 6
+ 0-12
+ 0'IO
14 48
+ 0-07
+ 0-08
16 18
+0-09
H 54
+ 0-09
+ 0-09
16 30
+ 0-08
+0-09
15 o
+ O'lO
+ 0-09
16 36
+ O'lO
+0-09
16 42
+ 0'08
+0-09
16 54
+ o-io
+ 0-10
Apr. 26
10 48
+ o-io
+ o-i I
16 54
+ O'IO
+ 0-10
I 1
+ 0-12
II 12
+ 0-15
+ 0-13
May 8
13 12
O'OO
O'OO
1 I 24
4-0-13
13 24
O'O2
II 36
+ 0-14
+ 0'I2
13 36
0-05
0-05
78 TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH -WATERVILLE
CANSO -MONTREAL, MADE IN 1892.
Transit B. continued.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
W
E
W
E
Montreal continued.
Montreal continued.
1892.
h 111
8
8
8
s
1892. h "i
s
s
s
i
May 8
13 4-8
0-07
o'o6
Mil}' 12
13 18
O'OO
O'OO
14 o
'O3
0-04
13 36
+ 0'02
+0:03
I 4 12
0-03
13 54
4- o'o6
+ 0-06
14 o
+ 0-04
+ 0-04
14 18
+ 0-03
+ 0-03
May 9
ii 6
+ 0-03
+ 0-09
H 3
+ 0-03
+ 0-03
ii 18
+ O'l I
+ 0'I I
'4 54
+ 0'05'
+0-04
ii 30
+ 0'1 1
5 6
+ O'Ol
+ 0'O2
1 1 42
+ O'lO
+ 0'IO
15 18
o-oo
ii 54
+ O'l I
+ 0'IO
'5 3
O'OO
O'OO
12 6
-f-O'IO
15 36
+ 0-07
+0-07
12 2 4
+ 0-07
+ 0-09
15 48
+ 0-07
+o'o6
12 30
+ 0-09
+0-09
'5 54
+ 0-03
+ 0-05
12 42
+ 0-07
+0-07
16 6
+ 0-05
14 o
+ O'lO
+ O'JO
16 18
4- 0-08
+ 0-05
14 6
+ O'IO
16 30
+0-05
14 12
+ O'lO
+ 0'IO
16 42
+ 0-04
14 24
+ o-io
4-Q'IO
14 3
+ 0-16
+ 0-13
14 42
+0-15
Mny 13
10 54
O'OO
O'OO
H 54
+ 0-14
+ 0-16
II 12
O'OO
O'OO
15 6
+ 0-17
+ 0-16
II 18
O'OO
O'OO
'5 30
+0-16
II 30
O'OO
'5 54
+ 0-14
+0-15
1 1 36
O'OO
O'OO
16 o
+ O'I2
+0-13
II 48
0-05
0-04
16 12
+ O'I2
12
,O'02
12 6
O'Ol
O'Ol
May 10
10 36
O'OO
O'OO
12 18
O'OO
O'OO
10 48
O'OO
O'OO
12 36
O'OO
O'OO
I I O
O'OO
12 42
O'02
O'OO
ii 18
+ 0'02
+ O'O2
12 54
O'OO
O'OO
ii 36
+ 0-07
+0-07
13 o
O'OO
O'OO
ii 54
+ 0-06
+ 0-06
13 12
O'OO
12
O'OO
O'OO
13 30
O'OO
O'OO
12 l8
O'OO
O'OO
3 36
O'OO
O'OO
12 30
O'OO
'3 54
+ 0'O2
+ 0'OI
12 36
O'OO
O'OO
14 o
O'OO
+ 0'OI
12 48
+0-04
14 12
+ O'Ol
13 o
+ 0-08
14 2 4
O'OO
13 18
+ 0-14
H 36
o-oi
13 4 8
O'Ol
14 o
+ 0'OI
May 12
12 36
0-06
May 14
10 48
11
O'll
O'lO
O'lO
12 48
O'O2
II 12
0-08
0-08
13 o
+ O'Ol
+ O'Ol
ii 18
0-08
0-08
ERROR OF LEVEL.
79
Transit B. continued.
Date.
Sidereal
Time.
Striding Level.
Xadir.
Adopted
Level
Error.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
w
E
W
E
1
Montreal continued.
Greenwich continued.
1892.
h in s
H
s
s
1892.
b m
8
s
8
s
May 14
1 1 48 0-04
0*04
Aug. 1 6
20 18
0-07
12 O ! O'OO
O'OO
20 30
O'Og
o - o7
12 12
0-04
0*04
20 42
0-07
12 24
o'o5
0-04
20 54
0-08
12 42
O'O2
'
O-O2
21 6
O'03
0-07
13 o
o - o3
0'03
21 18
0-07
13 12
0*03
21 30
O'04
0-07
13 36
0-03
'3
'3 48
o'O3
'3 54
O'O2
O'O2
Aug. 1 8
22 18
O'Og
0-08
14 o
0-03
O'O3
22 30
0-07
14 18
0'02
O'O2
22 4 2
0-06
22 54
0-O5
" 0-06
23 6
0-05
May 1 6
'3 54
- 04
o'O4
23 18
o'04
14 o
O'OO
2 3 H
0'O4
0-03
14 12
+ 0-03
+ 0'02
23 36
0-03
14 18
+ 0'02
+ O'O2
23 48
o - O3
O'O2
14 24
+ O'OI
+ 0'03
O'OI
14 30
+ 0-05
+ 0-04
12
+ 0-03
O'OO
14 42
+ 0-04
+ 0'04
o 24
+ o'o6
o-oo
.
H 54
+ 0'04
o 36
+ O'OI
o 48
+ 0-07
+ 0-01
I
o - O4
+ O'OI
Greenwich.
Aug. 15
21 42
O'OO
+ 0'02
Aug. 20
1 8 42
0-06
0-04
22
+ 0'02
18 54
O'O2
22 l8
+ 0-07
+ O'O2
19 6
+ o-oi
o-oi
22 30
O'OI
4-O'O2
19 18
o - oo
+ O'OI
22 42
+ O'O2
19 30
O'OO
+ 0-01
23 o
+ 0'02
19 42
+ O-O2
23 12
+ 0-06
+ O'O2
'9 54
4- 0-03
+ 0-03
23 18
+ O'OI
20 6
+0-03
23 30
+ 0-02
20 18
+0-04
2 3 4 2
+ 0'02
-f- O'O2
20 30
+0-04
20 42
+ 0-05
20 54
+ O'lO
+0-06
Aug. 1 6
18 42
0-07
22
+ 0-05
+0-07
18 54
O-O7
22 12
+0-07
19 6
o'07
o'O7
22 24
+0-08
19 18
0-07
22 36
+0-09
19 30
0-04
o'O7
22 48
+ 0-08
+ 0-10
19 42
0-06
0-07
23 o
+ O'I I
19 54
0-08
0-07
23 12
+ 0-14
+0-13
20 6
0-07
23 24
+0-14
* Inclination changed on August 17.
80 TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH WATERVILLE
CANSO MONTREAL, MADE IN 1892.
Transit B. continued.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
W
E
W
E
Greenwich continued .
Greenwich continued.
1892.
h m
S
S
H
1892.
h ID
8
s
S H
Aug. 20
23 36
+ 0-15
+ 0'l6
Aug. 2 2
23 o
0-14
23 48
+ o'i8
+ OM7
2 3 12
12
O-I4
-fo-iS
23 24
OM4
12
+ 0-18
+ 0-18
Aug. 23
21 42
O'O,
O'O7
Aug. 21
19 30
O'OO
+ 0-03
22
0'08
19 42
+0-04
22 12
O'O,
0-08
'9 54
+ 0-05
+ 0-05
22 24
0-09
0-09
20 6
+ 0-05
22 36
O'lO
20 24
+ 0-08
+ O'o6
22 48
O'l I
20 36
+ o - o6
22 54
o'og
o-i I
20 42
+ 0-04
+ o 07
23 6
O'12
12
20 48
+ O'l 2
+ 0-07
23 18
0-12
21
H-o-07
23 36
- 0'08
0'13
21 12
+ 0'08
+ 0-08
23 42
0-16
21 24
+ 0'08
+ 0-08
23 54
0-08
0-12
21 36
+ 0-09
21 48
+ O'l I
+ 0-09
22
+ 0-09
Aug. 25
18 18
O'll
<ri i
22 18
+ o-ic
+ 0-09
19 18
- 0-13
-0-13
22 30
+ 0'12
+ 0-09
19 30
-0-14
22 42
+ 0-09
19 42
O'l 6
-0-17
22 54
+ 0'12
+0-09
19 48
0-19
23 6
+ 0-06
+ 0-09
20
0-29
0-21
20 6
o - i4
o'lS
20 18
0-09
O'lO
Aug. 22
18 30
- 0-17
-0-15
20 30
0-06
0-04
1 8 42
-0-15
20 48
+ 0-04
O'OO
18 54
- 0-13
0-16
21
O'OI
19 6
-0-17
21 6
+ O'Ol
+ 0'OI
19 18
O'22
-0-18
21 30
+ 0-03
19 30
O'20
0-18
21 42
+ '<H
+0-03
19 42
-0-18
21 48
+ 0-04
+0-03
19 54
- 0-17
0-18
21 54
+ O'02
+0-03
20 6
-0-17
20 18
- 0-15
-0-17
20 30
-0-15
Aug. 26 18 24
- 0-15
-0-15
20 48
o - i6
-0-14
18 30
0'13
-0-15
21
O'l 2
19 12
- 0-17
O'lO
21 18
0-09
O'l I
19 18
O'OO
0-08
21 24
- 0-14
19 30
+ 0'02
0-06
21 30
O'lO
19 54
+ O'Og
o-oi
22 24
- 0-15'
-0'I 3
20 6
,
O'02
22 36
O'l I
O'I4
20 18
+ o-o i
+ 0'OI
22 48
- 0-15
0-14
21 48
+ o'4
+0-04
1
ERROR OF LEVEL.
81
Transit B. -continued.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
W
E
W E
|
Greenwich continued.
Greenwich continued.
1892.
h in
s
s
8
s
1892.
h m
8
E
s
a
Aug. 26
22
+ 0-03
+0-05
Aug. 29
2O 30
O'JO
-0-23
22 12
+0-05
2O 36
O'2I
22 30
+ o'o8
+ o'o6
20 54
0-08
-0-15
22 42
+ 0-07
2! 12
0-05
O'l 2
23 121+ O'l 1
+ 0-08
21 30
0-03
O'Og
2 3 H ,
+ 0-08
21 48
0-08
23 36
+ o - o6
+0-08
22 O
0-08
23 48
+ 0-08
22 l8
0-05
o'O7
O
+ 0-04
+ 0-08
22 2 4
0-04
0-07
12
+0-08
22 42
- 0-13
0-08
23 o
0-08
23 12
0-08
Aug. 28
1 8 48
- 0-14
0-14
23 3
0'12
O'og
'8 54 ;
O'I2
23 48
0*14
O'lO
19 6 o - o8
0'08
O
O'OI
O'l I
19 18
0-05
O'O6
o 18
O'OO
0'12
19 30
O'Oy
o 30
-0-13
19 36
O'l I
0-09
o 48
+ 0-02
-0-14
19 48
-o-i;
I O
-0-18
'9 54
- 0-15
0-17
I 12
0-05
20 o
0'22
O'2O
20 12
0'2 1
20 18
O'l6
O'2O
Aug. 30
18 24
OM4
o'i6
2O 24
O'21
18 36
0'I4
CM 6
20 36
0-09
o-i i
18 48
o-i 6
20 48
o'o7
19 o
- 0-13
0-16
21 18
O'OI
19 12
O'lO
O'i6
21 48
+ 0-03
+0-03
19 18
0-09
o'i6
22 12
+0-0;
19 30
0-16
22 24
+ 0-07
+ 0-06
19 42
O'J I
0-16
22 36
+0-07
'9 54
0'12
-0-15
22 54
+ o'o6
+ 0-08
2O 12
0'12
-0-15
23 6
+0-08
20 18
0-19
23 18
+ 0-09
+ 0-08
20 30
-0-14
23 30
+0-09
20 42
O'lO
-0-13
23 36
+ 0-06
+ 0-09
2 1
o-n
21 18
O'lO
21 36
o'og
Aug. 29
18 12
O-22
0'22
21 54
0-04
-0-08
18 36
-0-25
22 1 2
0-07
0-07
19 o
-0-2 7
22 30
0-07
0-06
'9 2 4
0-29
-0-28
22 36
o - o6
19 48
- 0-28
0-29
22 48
o - o6
o'o6
'9 54
- 0-28
0-29
23 12
o - o6
20 6
-0-28
23 36
o'o6
0-06
20 I 8
0-26
*3 4
0-06
0-06
GREENWICH OBSERVATIONS, 1892.
TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH WATERVILLE
CANSO MONTREAL, MADE IN 1892.
Transit B. continued.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adoptee
Level
Error.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
W E
W
E
Waterville.
Waterville continued.
1892. ] h m
a
s
a s
1892. h m s | s s s
Sept. 6
19 6
+ 0-04
+ 0-04
Sept. 13
23 6
O'I2
,
20
+ 0-04
23 36
0-04
O'lO
20 12
+ 0-04
23 48
O'OI
o-io
2O 24
+ 0-05
+ o'O4
O'Og
2O 36
+ 0-03
+ 0-04
o 18
0-04
-0-08
20 54
+ 0-03
+'4
o 36
-O'o8
21 6
+ 0-04
o 48
o - o6
0-07
21 18
+ 0-03
+ 0-04
i 6
0-03
o'07
21 30
+ 0-04
i 18
0-07
21 48
+ o-oi
+ o'4
i 36
0'02
0-07
22
+ '4
i 48
0-06
0-07
22 12
+ 0-05
+ 0-04
2 O
0-07
22 24
+ 0-07
+ 0-04
2 6
0-08
0-07
22 36
+ O'OI
23 o
+ O'O2
+ 0-04
23 18
+ 0-07
Sept. 14
19 12
+ O'OI
+ O-QI
23 36
+ O'OI
+ 0-04
19 18
+ O-OI
19 30
+ o-oi
+ 0-01
19 42
+ O'OI
Sept. 7
19 o
0-03
O-O2
"9 54
+ O'OI
O'OO
19 18
0-03
O'O2
20 6
o-oo
19 30
+ O'OI
0'02
20 18
o-oi
O'OI
19 42
0'O2
20 24
0-04
O'OI
'9 54
+ O'OI
O'O2
2O 36
O'O2
20 6
O'O2
2O 48
0-03
20 1 8
O'OO
O'O2
21 6
. O'Ol
0-03
20 24
O-O5
21 18
0-04
20 36
+ o-oi
O'O2
21 30
0-04
0-04
21 42
0-04
21 54
0-04
Sept. 13 19 o
0-05
O-I4
22 6
O'O2
19 12
-0-17
23 o
0-04
o'O4
19 18
0-05
OM4
19 24
- 0-08
O-14
19 36
0-14
Sept. 15
20 18
0-04
0-05
'9 54
0-04
-0-14
20 24
0-06
0-05
20 18
+ O'O2
-0-14
20 36
0-08
0-05
20 24
O'OO
-0-14
2O 48
0-05
0-04
20 36
O'OO
-0-14
21
0-04
20 54
O'OO
0-14
21 30
O'O2
21 12
-0-14
22 30
0-02
0-03
21 30
+ 0'02
-0-14
22 36
0'05
0-04
21 48
+ O'O2
0-14
23 o
0-05
22 6
22 18
+ 0-02
; -0'I 7
-0-14
23 18
23 36
O-05
0-04
i
I
0-05
0-05
22 36
,
-|- O'OI
-0-13
o 6
- 0-05
.ERROR OF LEVEL.
S3
Transit B. -continued.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Le*el
Error.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Adopted
Level
Error.
W
E
W
E
Water w'Zfe continued.
Waterville continued.
1892.
h m
'
s
8
3
1892.
h m
I
s
,
s
Sflpt. 1 5
o 36
O'02
O'O4
Sept. 1 6
2O O
+ O'02
+ 0-03
I 6
o'04
O-O4
20 6
+0-03
I 24
0*04
20 18
-)- 0-08
1 + 0-04
I 42
o - o6
0^05
2O 36
+ 0-05
i 54
0-05
20 54
+ 0-09
+ o'o6
2 6
o - O3
o'o;
21 6
O'OI
2 18
o - o3
0-06
21 24
+ O-O/
+ 0-08
2 42
0-07
0-07
21 42
+ OMO
1 6
0-09
0-08
22
+ O-I2
3 i
-0-13
22 12
+ 0-15
+ 0-13
3 30
- 0-05
o'og
22 24
+ 0-15
+ 0-14
22 30
+ 0-15
+ 0-14
22 42
+ 0-15
22 54
+ 0-17
+ 0-15
Sept. 1 6
19 6
O'OO
+ O'OI
23 6
+ OM5
19 24
+ 0-04
+ 0-01
o 18
+ 0-07
+ 0-09
19 36
O'OO
+ 0'OI
o 24
+ 0-09
19 jS
+ 0'02
o 36
+ 0-08
+ 0-08
.
Azimuth Error. In the following table, column 3 gives the azimuth error found
by the solution of equations as afterwards described. Columns 4 and 5 give the name
of a circumpolar star and the azimuth error deduced from the observation of this for
comparison with the figures in column 3. In the observations in April and May these
stars have generally been included in the equations. In August and September, as
stated previously, these polar stars were generally observed by moving the micrometer
wire. It was not considered necessary to incorporate these observations in the com-
putations for clock error, nor was it thought advisable to do so, as similar data were not
obtained in the first half of the work, and it was important to make the condition on
both sides of the Atlantic as uniform as possible.
84 TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH WATERVILLE
CANSO -MONTREAL, MADE IN 1892.
Azimuth Error.
S
From
From Polar Stars.
J
From
From Polar Stars.
Data
fl
Data
ft tC.
&
ii ornii'i j
Equations.
Name of Star.
Azimuth.
uato.
1
A
JN ormal
Equations.
Name of Star.
Azimuth.
Oanso.
Montreal continued.
1892. | 8
1892. s e
April 19
E
0700
May 9
W
-1-563
W
0-652
Ursas Minoris 0-65
E
1-603
4 H. Draconis..
-170
E
-0-553
E
W
-1-417
Ursse Minoris
-1-41
W
1-322
1 9 Ursse Minoris
-1-07
20
E
0-982
W
-0-792
4 Vises Minoris
0-70
E -0-681
y8 Ursas Minoris
0-64
10
E
1-760
W
-0765
W
1-603
E
-1-695
4 H. Draconis .
-1-74
W
-''554
21 W
-0-953
E
-1-047
4 H. Draconis ..
I'l I
W
1-069
12
E
0-448
E
-0-988
4 Ursse Minoris
TOO
W
0-421
4 Ursse Minoris
0-38
E
-0-688
W
i -i 60
Ursse Minoris
i "20
24 W
0-825
4 Ursae Minoris
-'93
E
-0-941
W
0-869
Ursae Minoris
0-81
13
W
-1-395
E
I -009
E
-1-403
4 H. Draconis .
i "60
W
-1-478
4 H. Draconis .
-1-45
E
-1-331
4 Ursse Minoris
-1-18
25 W
-0-945
E
0-883
4 H. Draconis ..
-0-95
E
-0751
'4
E
-1-419
W
0-966
4 Ursse Minoris
1-04
W
-0-834
4 H. Draconis . ] 0-8 1
E
1-061
W
-1-454
4 Ursse Minoris
-1-47
26
E
-1-155
W
1-265
E
rioo
16
W
1-912
4 Ursse Minoris
1-90
W -1-160
4 Ursse Minoris
1-22
E
-1-647
Montreal.
Greenwich .
May 4 E | 0-341
W
1-081
Aug. 15
W
+ 0-568
Bradley 2993 ...
+ 0-52
E
+ 0-584
Bradley 3 1 47 ...
+ 0-62
6
W
-1-404
E
1-712
[3 Ursae Miuoris
-1-65
W
-1-158
Ursse Minoris
-1-26
16
W
+ 0-667
X Ursse Minoris.
+ 0-68
E
1-8 1 1
-i '43
E
+ 0-580
\ Ursse Minoris.
+ 74
.
AZIMUTH ERROR.
85
Azimuth Error continued.
Date.
i
Position.
i
From
Normal
Equations.
From Polar Stars.
Date.
Position.
From
Normal
Equations.
From Polar Stars.
Name of Star.
Azimuth.
Name of Star.
Azimuth.
Greenwich continued.
Greenwich continued.
1892.
8
1892. s
Aug. 18
E
+ 0-828
Bradley 3147 ...
+ 0^2
Aug. 29 E
+ 0737
Bradley 2993 ..,
+ 0-71
W
+ 0-895 Bradley 3147 ...
-t- no
E
Bradley 3147...
f 0-8o
W
Brad. 1672 S.P..
+ 0-82
W
+ 0-985 Brad. 1672 S.P.
+ 0-91
E
+ 0-882 Brad. 1672 S.P..
+ 074
20
W
W
E
E
+ 0-977 Cephei 51 S.P...
X Ursse Minoris.
+ 0-6 10 X Ursae Minoris.
Groomb. 1119 S.P.
+ 0-90
+ 0-96
+075
+ 074
3
W
E
W
E
+ 0-873 Cephei 51 S.P...
+0-560 X Ursse Minoris .
+ 0-666 Bradley 2993 ...
+ 0-506 Bradley 3147 ...
+ 074
+ 0-60
+ 074
+ 0-65
W
+ 0-740 Bradley 2993 ...
+ 073
E
+ 0-527 i
WaterviLle.
21
E
W
E
W
+ 0-690
+ 0-721
+ 0-352
+ '479
X Ursse Minoris .
Groomb. 3548 ...
Groomb. 3548 ...
+ 0-81
+ 0-96
+ 0-72
Sept. 6
E
E
W
+ 1-363
+ 1-380
X Ursee Minoris .
Bradley 2701 ...
+ 1-40
+ 1-63
22
E
+ 0-936
Bradley 2993 ...
+ 1-07
7
E
E
+ 1 -400
Cephei 51 S.P...
X Ursae Minoris .
+ 1-46
+ 1- 49
W
W
+0973
+ 1-236
Bradley 3147 ...
+ I'ZO
W
W
+ 1-583
X Ursse Minoris.
Groomb. 1119 S.P.
+ 1-31
+ 1-42
*3
E
+ 0-901
Bradley 2993 ...
+ 0-98
IS
E
O'l IO
X Ursee Minoris.
0-06
W
+ 0-997
J
E
Bradley 2701 ...
+0-04
W
-0-088
PiazziIX.37S.P.
-0-14
25
E
+ 0-751
Groomb. 1119 S.P.
-t-o-95
W
Bradley 2993 ...
+ 0-09
W
+ 0-783
Bradley 2701....
+ 0-76
E
-0-053
Bradley 2993 ...
+ 0-12
E
Bradley 16728.?.
O'OO
26
W
+0-583
X Ursae Minoris .
+ 0-71
W
+ 0-136
+ 0-24
K
+ 0-313
Bradley 2993 ...
+ 0-37
W
+ 0-227
14
W
+0-052
Groomb. 1119 S.P. +0-15
E
+ 0-225
PiazzilX. 3 7 S.P. +o'ii
28
W
vv
E
W
w
+ 0-568 i Cephei 51 S.P...
X Ursse Minoris.
+ '337 X Ursoe Minoris.
+ 0-345 Bradley 2993 ...
Bradley 2997 ...
+ 0-67
+0-51
+ 0-52
+ 0-28
+ 0-2 1
15
E
W
W
E
0-004
O-OI2
+ 0-077
+ O-IOI
Bradley 3147 ...
Polaris
+ 0-03
+ 0-05
E
+ O'2I2
16 E
-0-199
X Ursse Minoris.
-0-25
W
0-126
X Ursse Minoris. 0-19
29
E
+ 0-854
X Ursse Minoris.
+ 0-75
w
Bradley 2701 ... 0-16
W
+ 0-762
Groomb. 3548...
+ 0-85
K
-0-088
Bradley 2993 ... o'lb
W
Bradley 2993 ...
W
0-081
Brad. 16.728.?..
0-05
August 21. The large diftereuces between the azimuths in the second and third positions, as determined from close polar
stars and from the normal equations, are no doubt in part due to the places of Bradley 2777 and 24 Cephei, used in the
equations, the latter being taken from the Berliner Jahrbuch without correction. Groombridge 3548 was, however, very
badly observed, ami gives an erroneous collimation. The night is not one which affects the longitude.
86 TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH WATERVILLE
CAN so MONTREAL, MADE IN 1892.
Clock Error Reduction of the Observations. The observed times of transit were
corrected for level and clock rates and for approximate values of azimuth. The equations
of condition for the stars in opposite positions of the instrument were then compared,
and the most probable value of the collimation constant determined from them. The
values so determined were in .all cases found to be constant for any one night, and a
reference to the tables will show that the values from night to night were fairly constant
during any one series.
The observed times of transit for each star were then further corrected for an
assumed clock error and for the collimation constant obtained as above.
If < = latitude of the place of observation
8 = the declination of the star
a = the apparent right ascension corrected for
diurnal aberration
A = sin. (<f> 8) sec. 8
B = cos. ( - 8) sec. 8
C = sec. 8
a = approximate value of azimuth error
If ft = inclination of horizontal axis of transit
c = collimation error
T = observed time of transit reduced to mean wire
d = correction for clock rate
t = approximate clock error at an adopted instant,
which is generally taken as the arithmetical
mean of a (T + Aa + IBb + Cc 0) for
all the stars observed during the nis'ht.
da and dt corrections to a and t ,
then
a = T + A (a + da) + B6 + Cc + (t + dt)
Or if
D = a - (T + Aa +Bb + Cc + t6)
Ada + dt - I) = o.
The equations of condition corrected as above are entered in the tables, and the other
values necessary for the computation of the clock errors are also there given. The
azimuth errors were assumed to have been different for each position of the instrument.
Normal equations were formed for each side, and corrections to the assumed values of
azimuth and clock error computed from them. In forming the normals the equations
of condition have been multiplied by a weight factor W, = / LU1_ This
V 10 + 2 sec. Z sec. 2 8
formula is due to Professor C. A. Young, and is a modification, taking into account the
zenith distance of the star, of those proposed by Struve and Safford. Where stars were
not fully observed, the equations were also multiplied by a factor W 8 =
N is the number of wires in the reticule and n the number observed. (See Chauvenet's
Astronomy, vol. ii. p. 198.)
The quantity (t + dt) represents the clock error given by any group of stars, and the
weighted mean of these quantities given by all the groups on a given night represents
the clock error for that night.
The stars observed were selected from the Berliner Astronomischen Jahrbuch,
the Connaissance des Temps, and the British Nautical Almanac. The Tabular
Apparent R.A., given in column 7 of the following tables, are those given in these
publications, corrected by the quantities given in pages 44 to 51, and also for diurnal
aberration.
STAR TRANSITS OBSERVED BY PROF. McLEOD WITH TRANSIT B AND RESULTING CLOCK ERRORS.
87
OBSERVATIONS AT CANSU.
Star's Name.
Dec.
1892 April 19.
TT Boiitis
109 Virginia
a Librae
/8 Ursre M.inoris.
S Boiitis
i H. Ursae Min.
n Bobtis
Coron. Bor....
v l Boiitis
a Serpentis
Serpnntis
n Serpentis
Ursoe Minoris
1) Hemilis
Groomb. 2377...
49 Herculis
K Ophiuchi
+.6 53
+ 2 21
'5 3 6
+74 3 6
+ 33 43
+ 6 7 45
+37 45
+29 28
+4" '2
+ 6 46
+ >5 45
+78 7
+39 7
+ 56 58
+ 15 09
+ 9 32
1892 April 20.
TI Virginia
20 Ooniie
K Draconis
e Ursae Majoris ..
f Virginis
17 H. Can. Ven.
i) Bobtis
T Virginia
a Draconis
4 Ursie Minoris..
A Boiitis
6 Bobtis
f Bootis
ir Bobtis
p. Virginis
Groomb. 2164....
8 Ursae Miuoris .
Ursfe Miuoris... i W
fl Bootis | W
ifi Bobtis i W
Libra; W
1 H. Ursi-e Miu. W
1892 April 21.
A Draconis
| Hydrse
v Leonis
3 Draconis
Leonis
3 Virginis
j Ursre Majoris ..
o 14
+21 30
+70 23
+56 33
+ 11 32
+37 44
+ >8 56
+ 2 4
+ 6 4 53
+78 3
+46 35
+52 21
+ 30 5'
+'6 53
5 "
+ 59 44
+74 3 6
+74 3 6
+40 49
+27 22
- 8 59
+67 45
e Corvi
4 H. Draconis
Ursa Majoris ...
n Virginis
20 Comae,
K Draconis
Ursse Majoris ...
8 Virginis
8 Draeonis
( Virgiuis
43 Comse
y Hydrse
Groomb. 2001
( Virginis
17 H. Can. Ven...
T Bobtis
i) Ursai Majoris ...
T) Bobtis
a Draconis
4 Ursre Minoris ...
+69 56
31 16
014
+ 6 7 21
+ 15 10
+ 2 22
+ 54 '8
+ /8 13
+ 57 3
04
+ 21 30
+ 7 2 3
+ 56 33
+ 3 59
+66 i
+ 11 32
+28 25
22 36
+72 57
03 9
+37 44, 9
+ 18 oi 9
+49 5' ! 9
+ 18 56; 9
+64 53 i 9
+78 3 5
r
Observed
Transit.
Tabular
Apparent
B.A.
Oomcttoai.
Level.
i *oo
0-99
0-92
0-54
0-94
070
0-97
0-99
0-97
I *OO
I'OO
0-98
0-43
0-97
0-87
I'OO
I'OO
h tu B h in s
45 3''93 1 '4 3540'59
o 50 39-19 I 14 40 48-68
5445-64 j 1444 55-52
1 054-42 1451 7-28
2055-91
23 12-43
30 10-23
33 7 '44
3647-41
48 39-28
50 54-18
53 40-60
57 39 '40
248 43-72
25247-04
2 56 4071
3 2 3-20
O'99 j 22 20 42-07
I 'OO | 22 30 35'25
0*64
0-86
I'OO
0-97
I'OO
0-99
0-76
0-40
0'94
0-90
0-99
I'OO
0-97
0-82
0-50
0-97
0-99
0*96
0-71
o'66
'75
0-99
071
I *OO
0-99
o'88
0-87
0-43
0-85
0-99
I'OO
o"6o
0-87
0-95
074
0-96
0-99
o'S7
0-54
0-99
0-98
1 *OO
0-92
I '00
0-76
0-41
22 35 10-72
22 55 30-81
23 3 0*26
2336 5-53
23 55 3 6 '44
o 211 '59
o 7 30*98
o 15 21 '43
15 II 1074
15 13 27-96
15 2O 26-43
15 23 24'19
'527 4'93
15 38 58-21
1541 13-59
'544 0-23
15 48 2'o8
16 39 13-09
1643 17-15
16 47 10-96
16 52 34-42
12 14 23-99 0-05
12 24 19-30 O'O7
12 28 57*05 0-19
1249 19-54 0-09
12 5649-45 0-04
13 30 o"39 0x57
13 49 34' 1 2 o'o6
13 56 10-36 0-04
14 131 '80 0*1 1
14 924-36 o"i6
o 18 17*03 [ 14 12 19*01 o'o6
027 30*14 I 14 21, 33/82 0-05
033 7*90
041 34*98
043 17*87
54 36*60
5 6 57'57
056 57-56
1 345-26
i 541-24
i 17 2*13
i 19 15*58
21 27 30'!!
21 30 II 'OI
2' 33 54'07
21 38 55*99
2' 45 59'89
2147 3076
21 5035*58
22 658*12
22 934*43
22 12 28*39
22 16 44*87
22 26 38*02
22 3 I 13*57
2251 33*37
22 52 26*05
225327*79
2259 3*16
23 9 3*38
23 '5 '5' 6 4
2325 35'5
23 31 21 '20
2332 8-23
2344 15-46
234525-09
23 5' 38'99
o 333'5 8
o ii 23*30
142712-31! o'oi
M 35 4'59 '
14 37 23-38 o'oo
14 48 45*02 o'oo
'45' ~']= o'oo
1451 7-30
457 54*68
'459 50*76 i
1511 12*96 0*00
1513 27*97 +0*02
o'oo
o'oo
o'oo
"25 3*40
11 2742*37
1131 26*16
" 3 6 3'43
n 43 34*32
"45 5 '3
11 48 1 1 '43
12 435' 28
12 7 15*58
12 10 7*6 1
12 I423*99
12 24 I9'3O
12 28 57'02
1249 1 9 '54
12 50 11*10
125' '4'49
12 5 6 49'45
13 65170
13 13 4-21
13 23 28*43
13 29 12*72
1330 0-39
'342 9-33
'343 '9' 6 4
1349 34-12
14 i 31-80
14 924-36
0*05
0*01
0*03
O*I2
0*05
0*06
0*14
0*37
-0*15
0*06
0*06
0*16
o*ii
0*04
0-14
0*05
0*07
0*03
0-24
o'o6
o'n
0*09
0-15
0*09
0*18
-0*32
Collima-
U'.n.
Assumed
Clock Slow
(Hourly Rate)
[Azimuth].
Equations of
Condition.
|-- j Normal Equations and Solution.
+0*03
+0*02
+0*O I
+0*02
O*O7
-0-13
0*03
O'OI
+0'0l
+0*0 1
+O'OI
+0*01
+0-04
o'oo
o'oo
o'oo
o'oo
o'oo
0*00
O'OO
O'OO
0*00
0*00
O'OO
o'oo
o'oo
O'OO
o'oo
o'oo
O'OO
+0*05
+0*05
+0*15
+0*09
+0*05
0*06
0*05
0*05
0*12
o '24
+0*07
+0*08
+0*06
+0-05
+0*05
+0*10
+0*19
0*19
0*07
0*05
0*05
0-13
+0'I2
+0-05
+0*04
+0*10
+0*04
+0-04
+0-07
0-04
O'20
0-07
0*04
0*04
O'12
+0-04
+O'O2
+0*05
+0*02
+0*02
+0*02
+0*07
0'O2
0*03
0*02
0*03
0'02
0-05
Canso.
io h 9
488-6ioat i h
(+98-900)
[08-670]
[ o s *6oo]
+0*50 da+dt+ "04
+0-68 ,, -08
+0*91 ,, +'04
1*84 ,, "07
+0*24 da+dt '19 =
I'oi +'17 =
+04 =
09 =
-(-0*17
+0*31
+0*10
+0*63
+0*51
+o*75
-2*63
[ o'4oo]
+*o8
+18
-16
= o +'05
= o '08
:OJ+'03
: O ! 'OO
:0 '19
,+"-
:O
O
: o
+09
+0*14 da+dt '13 =
'37 , +'o =
+0'52 ,, +'l6:
+0*59 ,, +'06 -
'4
+06
+-io
'02
2-385 ila +i -401 dt +8-040=0
i -401 da +3-118 dt -024 =
+8-021 -027
3-155 da +1-648 dt + S *i68 = o
1-648 da +7-381 dt + '104=0
s '5 2 >
-002 '03 2
0-740 da +0-967 dt+ 3 'ioo = o
0-967 da +3-698 dt+ '094 =
-"'53,
+ 3- oi 5 '045
Mean value of dt +o s '007, Wt. 14-20
Canso.
_ I0 h 6m
08*920 at o h
(+9^-826)
[-18-050]
+0*43
1-26
'35
+o*57
[ o s '8oo]
[03*770]
[ o s '900]
da+dt+'i5 =o
'08
+'13
'03=0
+0-17 da+<1t+'03 = o
+0*47 4-'l9=o
+0*69 ,, +'02 =
0*79 ,, *i I =o
2*61 +'36 =
0-03 da+dt+'i2 = o
O'2O '
+0-29
+0-50
+'77
0-49
-1-84
+o'io
+'35
+0-82
+09
"09
-06
+ 'I2
+08
+29
'06 =
05-
+'07 =
+'47 =
+''3
'12 1-746 da +0-917 dt 8-056 =
'02 0-917 da +4-129 dt + "219 =
+'7 i
06 +s 068,
2*150 da +0*426 dt + s 'oio = o
0-426 da +3*659 dt+ -234 =
04
13
+05
+-oi
'12
'07
+'3
'oi
+03
+ 3 'oo8,
8-065 '045
+-,8
i '936 da +0*536 dt S 'i4i =o
0-536 da +5*537 dt+ -270=0
+"089,
"058 '026
2"i2i da +0*23 1 dt 270 =
0-231 da +3-597 dt + '229 =
+135, -i
Canso.
Mean value of dt 08*065, Wt. i6'93
[ 18-100]
[ i s *ioo]
[ i s *ioo]
i *2 1 da+dt+*o6 =
+ ''4 i, '18-
+o'7' + - '5 =
o'97 ,, +'44 =
+0*52 ,, -01 =
+0-68 ,, '06 =
0*27 +'H =
1*00 da+dt+'i2 =
2*66 ,, +'io =
0*40 ,, +'36 =
+0*71 ,, +*o8 =
+o - 43 .. ''4 =
1'26 ,, +'I2 =
0*35 da+dt '04 =
+0*66 +'17 =
0-87 +*3' =
+o'57
+'33
I'OO
-,' 5 8
[ i s 'ooo]
'03
+04
+*o8
+0*71 da+dt+'o7 =
+0-17
+0*48
O'I2
+o'47
0*79
2-61
+04
+05
+09
+ '02
+03
'4
*o8
+''5
+'4
03
-06
+06
06
+21
+02
+5
+03
'10
'01
03
+02
*OI
*oo
+03
03
'03
+ 02
3-105 da +1-285 dt 8-326=0
i '285 da +5-237 dt+ '334=0
+ 8 ''47,
s 'ioo '036
3*425 da +0*645 dt 8- I2I =o
0*645 da +4*004 dt + '349 =
+ S '053,
8*0964^*053
2787 d#+i *oi6 dt s *ooo = o
i'oi6 da +5*157 dt + "410=0
+8*031,
2-487 da +o'8i4dt
o-8i4da+5'533dt + "288 =
Clock A
Appare,
tl.v
at i h
_ I0 h fim 0^-985
at o>>
at
Mean value of dt o s *o83, Wt. 19*93
88 TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH WATERVILLE CANSO MONTREAL, MADE IN 1892.
Star's Name.
Position.
Dec.
No. ot Wires.
.j
f
O
Observed
Transit.
Tabular
Apparent
a.A.
Cor
Level.
action.
Collirna.
tion.
Assumed
Clock Slow.
(Hourly Rate)
[Azimuth].
Equations of
Condition.
Weighted
Residual.
Normal Equations and Solution,
da. dt.
Clock Apparently
Slow.
1892 Apr!
4 Ursse Minoris...
X Bobtis
124
w
w
w
w
w
E
E
E
E
E
W
W
W
W
W
W
E
E
E
E
E
E
I 25
W
w
w
w
w
w
E
E
E
E
E
E
E
E
E
E
E
W
W
W
W
W
W
W
26
E
E
E
E
E
E
E
W
W
W
w
\v
w
E
E
E
E
E
E
+7 3
+46 35
+30 51
15 36
+74 3 6
+40 49
+27 22
- 8 59
+ 6 7 45
+29 28
+41 12
14 26
+ 6 46
+'5 45
+18 28
+78 7
3 2 5
4 26
+76 9
+46 34
+61 45
+21 43
31 16
o 14
+ 6 7 21
+48 2 3
+ 15 10
+ 2 22
+ 9 20
22 I
+ 7 8 ,3
+57 38
o 4
+56 33
+38 54
- 4 58
+28 25
10 36
+72 57
+78 3
+46 35
+52 21
+ .6 53
- 5 ii
+ 2 21
+74 3 6
+ ,, 7
+ 62 20
+ 755
+45 5
22 14
+2, 7
+64 55
+69 56
31 16
o 14
+48 23
+ 15 10
+ 2 22
+72 57
o 3
+37 44
+18 o
+49 5-
+ 18 56
9
9
9
9
4
9
9
9
9
9
9
7
9
9
9
8
9
9
7
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
8
9
9
9
9
4
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
8
9
9
9
0-44
0-94
0-99
0-92
0-50
0-97
0-99
0-95
071
0-99
0-97
0-90
I'OO
I'OO
I'OO
0-43
0-98
0-97
0-49
0-94
0-80
I'OO
075
0-99
0-72
0-93
I"OO
0-99
I'OO
0-87
0-43
0-85
0-99
0-87
0*96
0-97
0-99
0-95
0-59
0-40
0-94
0-90
TOO
0-97
0-99
0'54
TOO
o"8o
I'OO
0-95
0-87
TOO
076
o"66
o' 75
o" 99
0-93
I'OO
0'99
0'59
o'99
o'9&
I'OO
O'92
I'OO
h in s
23 59 3070
O 227'6l
o 17 i8"49
o 34 59-42
041 7-96
04755-81
049 5171
i 12*56
3 2 5'4
13 2i'i8
17 I'oi
19 26*99
28 52-93
31 7-82
3347-83
37 5 2 '3
i 5832-41
2 227-II
2 346-44
2 6 1974
2 12 20-97
2 15 22-83
19 85371
19 12 36-61
19 1738-23
19 21 31*08
192442-43
19 26 13*52
194049-07
I94540'I7
19 48 15-82
1951 I0'32
I95527"I7
20 30 15*96
203157-05
2045 17^67
204745-65
21 O 24*06
21 4 iS'io
21 50 5*36
21 53 2'n
22 2 I5'l8
22 I 6 2O"42
22 18 3-49
22 21 27*93
2231 4275
18 20 57'6i
18 34 24^14
18 3646-98
18 40 54-88
18 43 40-30
18 45 40^48
18 53 43*67
19 215-87
-9 4 57'7 2
19 S 40*39
19 17 34*56
19 20 46*23
1922 17-23
21 021-47
21 6 7-67
21 654-32
21 19 173
21 20 ( I*O8
21 26 25*31
h m s
14 924-34
14 12 I9'O4
1427 12-34
'44455-58
45' 7'34
-4575473
1459 50-81
15 ii 13-02
15 13 28*04
152324-27
1527 5*00
1529 30*44
153858-29
15 41 13-68
'543 54">9
15 48 2-28
16 8 42-38
16 12 37-57
1613 59-98
1 6 1 6 3 1 "60
162234-53
16 25 36-02
ii 2742-32
ii 31 26'i4
ii 36 3O'3i
II 40 22'85
i'43 34' 2 9
"45 5' 2 8
ii 5943*68
12 435' 2 7
12 715-38
12 10 7-56
121423-97
12 49 '9'5
1251 0*50
13 4 22 '74
13 651*70
13 1931-48
132328-34
'4 9 2 4'33
14 12 ig'03
1421 33-87
143540*65
'437*3'44
14404875
45 1 7'35
10 43 35'74
1057 6'2i
105927*71
ii 337*19
ii 621*67
ii 8 23*06
1 1 1 6 28*90
1125 3-22
ii 27 42-32
1131 26'! 3
1 1 40 22^84
ii 43 34-29
"45 5' 2 7
13 23 28^36
1329 1274
13 30 0-40
1342 9-36
-343 i9' 6 5
'349 34-15
+0-16
+0*06
+0-05
+O'O2
+0-13
+0'05
+0'04
+0'O2
+0'IO
+0*04
+0*04
+0*02
+0-02
+0'03
+ 0'03
+0'I2
+O*0 1
+O'OI
+0-07
+0'03
+0'04
+0'02
+0'O2
+o'o6
+O'22
+0*15
+'9
+0'07
+0/09
+0'05
+'45
+ O'20
+o'o8
+o'i6
+O"IO
+0-05
+0*08
+0-04
+0'2I
+0'24
+0-09
+ 0*11
+o'o6
+0-04
+0-05
+0-26
+0-09
+0-23
+0'IO
+0-17
+0-05
+0*13
+0-29
+'34
+0-03
+0-08
+0-1 8
+O'II
+0-09
+0-42
+O'IO
+0-18
+0*15
+0-24
+0-16
s
+O'IO
+0-03
+0'02
+O'O2
+0*07
0*03
O*O2
O"O2
o"o5
O"O2
+O*II
+0*08
+0*08
+0-08
+o"o8
+0*39
0-08
0-08
0-33
0"I2
-0-17
0-09
O"I I
0'09
0-23
0-I 3
0*09
O'Og
+0"09
+ O'IO
+0*44
+0*17
+0*09
+0*09
+0*06
+0-05
+0*06
+0-05
+0-17
0-24
0*07
0*08
0-05
0*05
0*05
0*19
+0-04
+0-09
+0-04
+0*06
+0*04
+0-04
+0*09
O'I2
O'OC
0'O4
o'o6
0*04
0*04
0*10
o'O3
0*04
o'O3
0*05
0*03
Canso
9^ 49 ra
583-900 at i h
(98*972)
[ o s 'goo]
1 o s *goo]
[ o s '9oo]
[ i s *ooo]
Cansc
_ 7 h 4 ,ln
I "780 at 20 h
(+96*920)
[_ ,8-000]
[ i'ooo]
[ o s '9Oo]
[ o s '9Oo]
Canso
-7 h 37 m
4 a '88o at 20 h
(+9 8 '8 7 o)
[ I S '200]
[_ ,8.300]
[-is--5o]
s
2*61 da+dt+'oi =o
O'O3 ,, + -22=O
-{-0*29 ,, '03 o
+0*91 ,, +'oo = o
'4 ,, +'45 =
+0*10 da+dt+'n =o
+"35 ,, +-02 =
+0*82 ,, +'IO=0
I'OI '01=0
s
'3
+ 12
*IO
*02
+,,
+08
'02
+ -0 3
'oo
-08
08
+-,o
+0,
'OI
-03
+'5
03
+08
'OI
+'3
'04
'14
lean va
-09
+'4
-05
+'7
09
+09
05
"10
08
+10
+08
+06
'02
+03
17
+09
+03
07
09
'5
-04
+ '2I
'oo
+ '22
ea val
+ 09
05
+06
17
+04
'ii
+-:6
'01
03
+03
+ 02
04
+ 02
+ '06
+ 12
09
-0 3
04
+ 0,
2'959 da +o'o66 dt S '2i7 = o
o'o66 da +3'i54 dt + '278 =o
+ 8 -075, 8 *o9o-o5i
i '355 da +0-980 dt +"'083=0
0*980 da +4*308 dt + '165 =o
"'041, S 'O29'022
2'8i4 da +['951 dt +"'078 =
1-951 da +4-936 dt + '357=0
+"031, S 'o84-o22
2-614 da +0*946 dt + S 'o94=o
9 h 49 m 58 s '96g
at i&
_yh 4 im jS-gog
at 20 h
7 h 37 m 4 8 '959
at 2o h
p Bobtis
a~ Librae
Ursm Minoris...
/3 Bobtis
t^ Bootis
Librae
i H. Ursae Miii....
j8 Coron Bor, .
j/ 1 Bootis
-(-o'io da+dt+'oo = o
4-0-8? ,, +'17 =
7 Librae
a Serpentis
Serpentis
K Serpentis
+'5' +'06 =
-f-o'4l ,, +'04 =
2*63 ,, -{-'29
-(-075 da+dt+"O5 = o
Ursse Minoris...
5 Ophiuchi
f Ophiuchi
19 Ursse Minoris..
2-14 .. +'04=0
O'OJ + '2I=0
17 Draconis
S 'oo9, S '075'O33
lue of dt o s- o69, Wt. 17-06
2-427 da +1-945 dt + s 'O94 = o
i'945 da +4-906 dt + '467 =o
+ 3 '55i 8 "ii7-o28
3-022 da +1-271 dt S 'i86 = o
i'27i da +3-664 dt + '330 =
+ 8 'ii7, 8 'i3i'038
2-283 da +'' I2 9 d* "'190 =
i'i29 da +4*850 dt + '474 =
+ 8 'i49, S 'i32'o32
3-356 da +0750 dt + 8 '325 = o
0750 da +5-066 dt + "750 =
_s-o66, 8-138 '048
ueofdt o s 'i29, Wt. 18-47
2 '270 da +1/523 dt + S 'oi8 = o
1-523 da +5-877 dt+ '407 =
+ 3 '045, S 'o8i'o36
2-577 da +1-921 dt + s 'oi 4 =
1-921 da +4-823 dt + "192 =
+ s '035, 8 'o54'oi5
i 8 4 4da+i'i47dt+ s -028=o
i '147 da +5-096 dt + "474 =
+"'050, *"I04"026
3 Herculis
] 892 Apri
f Hydrae...
+0*43 ,, '06 =
]
v Leonis.
-j-i 14 a-f- 7
3 Draconis
'97 ,> +-io = o
0-08 +'19 =
X Ursae Majoris...
3 Leonis .
13 Virginia
-j-0'68 ,, 4-' I 7=
+0*60 da+dt+'o2 = o
o Virginia
e Corvi
4 H. Draconis
8 Draae Majoris ...
TI Virginia
2-66 ,, +'26 =
0-40 +'29 =
+0-71 ,, +'13=0
0-35 da+dt+'25 = o
+0-14 ,, +-09 =
f UrssB Majoris....
& Virginis
+ 77 i> "f" 5
+o 33 09 o
Groomb. 2001
4 Ursae Minoris...
A Bootis
o 84 ,,
1-58 +'41=0
2 '6 1 da+dt '21=0
0*03 ,. +'04=0
6 Bobtis
H Virginis
+'77 ,, +'40 =
+0-68 +"i8=o
''84 ,, +'43 =
M
+0-57 da+dt+'i5 = o
0-63 +'05 =
+o'6i ,, +'n=o
+0'OI ,, 'IO = O
-f-i'oo ,, -(-'08 =
-0-44 ,, '05 =
o'8o ,, +'33 =
i '2 1 da+dt+'C7 = o
+ 1-14 ,, '03 =
-|-o'7i ,, +'06 =
o'oS ,, -(-'08 =
109 Virginis
3 Urse Minoris...
1892 April
I Leonis
a Ursae Majoris...
X Leonis
fy Urs Majoria...
3 Crateris ,.
Groomb. 1771
\ Draeonis
Hydrae
u Leonia
X Ureae Majoris...
$ Leonis
Virginis
Groomb. 2001
( Virginis
17 H. Can. Ven. .
r Bobtis
+0-68 +-05 =
1-58 da+dt+*29 = o
+071 +-18 =
T'*7 .. +'oo = o
?! Ursse Majoris...
TJ Bobtis
O'I2 ,, + 'o6 = O
+'47 +'09 =
STAR-TRANSITS OBSERVED BY PROF. MLEOD WITH TRANSIT B., AND RESULTING CLOCK ERRORS.
OBSERVATIONS AT CANSO AND MONTREAL.
89
Star's Name.
Dec.
Obierved
Transit.
Tabular
Apparent
E.A.
Corrections.
Level.
Collima-
tion.
Assumed
Clock Slow
(Hourly Bate)
[Azimuth].
Equations of
Condition.
11
"S3
sg
4
"s'ormal Equations and Solution.
da.
dt.
Clock Apparently
Slow.
1892 April 26 continued.
Virginis
a Draconis
I Bootis
it Virginia
4 Urs;e Minoris...
it Bootis (ist star)
u. Virginia
1892 May 4.
20 Comae
K Draconis.
Ursa; Majoris..
a Can. Ven
8 Virginis
y Hydras
69 H. UrsKj Maj..
17 Can. Ven
1892 May 6.
17 H. Can. Ven... W
T Bootis
i; Ursse Majoris....
o Draconis,
W
W
W
Bootis j W
7 Bootis \ W
109 Virginis
er Librae
Groomt>. 2164
Ursse Minoris...
t|/ Bootis
y Librae
a Serpentis
18 Serpentis
K Serpentis
Ursse Minoris....
t Coronse
B Draconis
T Herculis..
i] Draconis..
Herculis..
A Draconis..
( Ophiuchi..
+ 2 4
+64 53
+25 36
- 9 46
+78 3
+ '6 53
5 ii
+21 30
+70 23
+5 33
+38 54
- 4 58
22 36
+ 60 30
+37 44
+37 44
: +i8 o
+49 5'
+64 53
+30 51
+38 47
+ 2 21
15 36
+ 59 44
+74 36
+27 22
14 26
+ 6 46
+'5 45
+18 28
+78 7
+27 "
+58 5'
L892 May 9.
y Ursse Majoris ...
8 Crateris
a Leonis
\ Draconis
{Hydra
v Leonis
3 Draconis
X Ursae Majoris...
e Corvi
4 H. Draconis
$ Ursse Majoris . . .
TJ Virgiuis
8 Can. Ven
24 Comae (2nd star)
8 Virginis
o Can. Ven
B Bootis
TT Bootis
ft Virginis
109 Virginis
o 2 Libra?
fi Uisae Minoris...
ij/ Bootis
34
+ 6 > 45
+21 43
+69 o
10 21
+33 41
14 12
+ 6 37
+69 56
31 16
o 14
+ 67 20
+48 23
22 I
+78 '3
+57 3
04
+4i 57
+ ,8 58
+ 3 59
+38 54
+52 21
+16 53
5 ii
+ 2 21
15 36
+74 3 6
+2 7 22
0'99
0-76
0-99
0-95
0'44
o'gS
0-97
h in s
21 33 0-64
21 38 I9'27
21 42 18-46
21 43 58-10
2146 7-73
22 12 24-10
22 14 7-14
h m s
1356 10-39
14 131-81
14 5 30-14
14 7 9-41
'4 924'33
143540-65
'4 37 23-45
+0-13
+0-42
+O"21
0'12
+0'8 5
+0'2I
+0-I5
I'OO I 122645-27 122419-23;
0-65
0-86
0-84
0-97
0-87
0-83
0-97
0-97
I'OO
0-90
0*76
0-99
0-91
0-99
0-92
o'8 1
0-54
0-99
0-92
I'OO
I'OO
roo
0-43
0-99
0-85
0-94
0-8 1
roo
0-68
0-95
0-98
0-92
roo
0-66
076
0-99
072
0-93
0-86
0-43
0-85
0-99
o'97
I'OO
099
0-95
0-90
I '00
0-96
0-99
0-92
0-54
0-99
123122-55 12 28 56-64
'2$' 45'59i "49 '9 '4
125326-53 1251 0-45
-O'2O
-0-54
0-26
13 6 49*38 i t *" /i
13 15 30-87 | 13 13 4-24
13265777 132432-51
-.--. .,*;-,-. j- ,Q 0*39
3 4 22-74 | '' 2
0-07
0'35
0'22
'3 3 2 3''45
'344475
>3455'35
14 4 1-42
'4 2943'5 6
1430 1675
1443 20'62
144727-89
1451 14-65
'4 53 34'57
15 2 22-O7
'S3 2 2-44
1541 29-87
'54345'3
154625-53
15 5029-87
'555 3977
16 225-16
16 19 2-30
1625 4-16
1628 7-58
163043-59
16 33 46-18
ii 15 1778
Ii 16 36-16
ii 1 8 13-44
ii 27 38-31
ii 30 21-50
" 34 473
11 39 5-91
"43 '3'
12 7 14-04
12 946-49
12 12 44'OO
1217 2-52
1231 16-14
12 32 22-31
12 5249-50
12 53 38-00
14 24 11-23
14 38 19*01
1441 2-42
144327-53
'447 3478
'453 4I-94
15 228-97
13 30 0-38
1342 9-37
13 43 19-62
14 i 3175
14 27 I2'42
142745-87
1440 48*86
'4445570
144845-15
1451 7-38
14 59 50-93
15 29 30-62
15 3858-47
1541 13-84
'5 43 54'3 6
1548 2-57
1553 8-68
I55954'83
161631-83
1622 34-79
16 25 36*24
16 28 15-47
16 31 14-15
ii 12 40-00
ii 1357-19
ii 15 34-89
1125 2-68
ii 27 42-19
1131 26*03
n 36 29-84
1 1 40 22*64
12 435-19
12 7 14-49
12 IO 7-3!
12 14 23-92
1228 3873
122944-15
12 50 II'oS
1251 0-42
1421 33-89
14354075
'437 23-56
14 40 48-87
'4445573
'45' 7'37
14 59 50-96
0*04
+0-05
+0-08
+0-1 1
+0-14
+0-15
+0-05
+0*03
+0*10
+0-13
+0-03
+0-04
+0-08
+0*09
+0*10
+0-45
+O"I2
+0-23
+0-13
+0-18
+0*09
+0-23
+0-05
+0-05
+0-08
+0-29
+0*03
+0*08
+0*26
+0-15
+0*04
+0*41
+0-1 8
+0*07
+0*12
+0*09
+0*05
+0*09
+0-16
+0-14
+0*10
+0*11
+0*08
+0-53
+0*17
+0*03
+0-07
+0-03
+0*03
+0*14
+0-03
+0-03
Canso.
h m s
7 37 4-880 +0-69 da+dt+'o3 = c
at 2O-- 1 0*79
(+9 8 -8 7 o) +0-37
[-18-150] +0-83
: 2-61
+0-50
+077
+15=0
+09=0
+ 'IO =
'03 =o
+ 'OI =O
+17=0 +-08
05
+06
03
07
3-708 da +2^036 dt +8-195 =
2-036 da +5 -535 dt + '448 =
s-oio,
J_ 7 h 37 m 4 s- 959
at 2o h I
Montreal.
O'lO
0-27
o'i6
0'12
+0-09
+0*10
+0-1 8
-j-O'II
2 m 258-650 1+0-44 da+dt "04 =
at I5 h j 1*25 ,, '17 =
(o a 'ooo)
[ 08-300]
[ i s 'ioo]
0-35
+0-15
'I2=0
"OO = O
Montreal.
0-13
O'lO
0*16
0-24
O'I2
0-13
+0'IO
-j-O'IO
+O'2O
+0-38
0-07
0*07
0-07
0-07
0-34
0-08
0*14
+0'IO
+0-15
+0-08
-j-O'20
+0*07
2 m 30" 700
at i5 h
(08-000)
[ i s '40o]
[-' S 75o]
+077 du+dt+'i2 = o
i'oi -10 =
0-53 ,, +'oi=o
+0-17 ,, +-04=0
+0*17 da+dt "04 =
+0*48 ,, '04 =
0-12 +'12 =
0*78 ,, '07 =
+0-29 ,, +'05=0
+0*15 ,, *oi=o
+0-68 da+dt+'02 = o
+'9' +'03=0
0*49 ,, '04 =
1-83 ,, +'20 =
+'35 .. '03 =
+0-63
+0-51
[18-200] '+0-48
2-62
+0-35
0-45
+0-89 da+dt+'o2 = o
'05 =
"10 =
08 =
-15 =
+ 01=0
+"26 =
[ i s '90o]
Montreal.
o"i6
0-13
0-13
0-38
0-15
0-13
0-34
O'20
+0-14
+0-64
+0-24
+0-13
+0-18
+0-14
+0-13
+0-17
+0-08
+o'o5
+0-05
+0-05
+0-05
+0-19
+o'o6
2 m 378750
at I4 h
( o s 'no)
[ i s -6oo]
0*03 da+dt+"o6 = o
-'59 +'i2 = o
+'43 ,, -01=0
I'll "04 =
+0-84 -15 =
+0-25 da+dt "11=0
+0-89
+0-63
T20
+ 1-14
+072
0-96
O'o8
[ i*"70o]
[_ i- 300 ]
+03 =
+04 =
+ '00 =
*I I =
+ 'O2 =
03 =
+1-00 da+dt -21 =
2-65 +-oo =
'39 i. +-21 =
+0-71 +'04 =
+0*08 ,, "02 =
+0-47 +'oo =
+0-66 ,, '17 =
+0-15 ,, '04 =
0-20 da+dt+'o5 =
+o'5 '03 =
+078 +-, 7 =
+o'69 > +'9 =
+0*91 ,, +'16 =
1-83 ,, -18 =
+0-35 '08 =
Mean value of dt 08-079, Wt. 21-34
05
07
+0
"IO
03
+01
o'957 da o'235 dt + 5 'o4i =o
0-235 da +2-868 dt '025 =
8-041, +8'oo5'o42
i -556 da +1 -283 dt +8-013 =
1-283 da +3-328 dt-j- -085=0
+ a "019,
Mean value of dt "-015, Wt. =6-20
04
05
+11
05
+05
'01
+02
+ 04
-06
+ '06
04
09
07
'II
+'02
+ 20
+06
+06
"10
07
0-720 da +0-502 dt +'-005 =
0-502 da +5-137 dt+ "023=0
2-417 da +0-924 dt "-069 =
0-924 da +3-754 dt+ -053 =
+8-038,
'"O23'O2I
3-104 da +1-912 dt 8 "ii7 = o
1-912 da +5-734 dt '040 =
+"042, 8 "oo7'o33
1-619 *-* +0-2
0-263 da +3'9O5 dt -026 =
+8-089,
+ 9- ooi-o30
Mean value of dt "008, Wt. 18-52
14
05
07
+-oi
03
+'9
*1O
'II
+'5
03
+ 06
'09
+08
+'i
+05
+ 'O2
'12
3-493 da +1-900 dt S 'o62 = o
i -900 da +6-183 dt + ' I 47 ==o
+ 8 '037,
8-035 '028
3 -307 da +1-966 dt s -304 =
i -966 da +6 -45 1 dt -188 =
+ 8 '097,
8 'ooo"o29
3-115 da +2-316 dt + s '356 = o
2-316 da +5 -8 30 dt + '253=0
_ 2 in 258-665
at 15
_ 2 m jo s '7
at 15''
-2 m 3
at
GREENWICH OBSERVATIONS, 1892.
90
TELEGRAPHIC DETERMINATION OF LONGITUDE.
Name of Star,
Dec.
Observed
Transit.
Tabular
Apparent
B.A.
Corrections.
Level.
domina-
tion.
Assumed
Clock Slow
(Hourly Bate)
[Azimuth].
Equations of
Condition.
53
II
formal Equations and Solution.
da.
dt.
Clock Apparently
Slow.
1892 May 9 continued.
H. Ursse Minoris...
Serpentis
Serpentis
K Serpentis
Serpentis
Ursas Minoris
5 Ophiuchi
1892 May 10.
a Lfrsse Majoris E
X Leonis E
II rsse Majoris E
Crateris E
5 Leonis , E
v Ursae Majoris I E
5 Crateris E
\ llraconis E
{Hydra j W
u Leonis ' W
3 Draconis W
X Ursae Majoris i W
Leonis
Virgmis
y Urs!E Majoris
o Virginia
f Corvi
4 H. Dfiiconis.. .
5 (Jrsiv. Majoris .
n Virginis
20 Comae....
f Ursse Majoris .
5 Virginis
( Virginis
+67 45
+ 6 46
+ 15 46
+ 18 28
+ 4 48
+7 7
3 25
+62 20
+ 7 55
+45 5|
22 14
+2, 7
+33 4'
14 12
+69 56
31 l6
O 14
+67 20
+48 2 3
+15 10
+ 2 22
+54 18
+ 9 20
22 I
+78 .3
+57 38
04
+21 30
+56 33
+ 3 59
+ 11 32
1892 May 12.
Ursae Majoris E 1+56 33
- " ' +38 54
+72 57
- o 3
+37 44
a Can. Ven ! E
E
K
E
Grooinbridge 2001....
f Virginis
17 H. Can. Ven
W
W
W
4 Ursa? Minoria W
y Bobtis W
t\ Bobtis
T Virginis...
a Draconis.,
Bob'tis
^ Virginis
109 Virginis..
<!/ Bob'tis
$ Libras
i H. Ursas Minoris...
n Bobtis
Coronas
i/ 1 Bobtis...
a Serpentis
$ Serpentis
K Serpentis
' Serpentis
fUrsas Minoris.
/3 1 Scorpii
6 Draoonis
S Ophiuchi
1892
May
Ursfe Majoris
a Ursse Majoris
X Leonis
i/< Ursa3 Majoris.
Crateris
8 Leonis
v Urste Majoris
\ Draconis
13.
w
W
\\-
W
AV
W
w
w
+18 56
+ 2 4
+64 53
+78 3
+38 47
+ <6 53
- 5 II
+ 2 21
+ 27 22
- 8 59
+67 45
+37 45
+29 29
+41 12
+ 6 46
+ '5 45
+ 18 28
+ 4 48
+78 7
19 31
+58 5'
3 25
+56 58
+62 20
+ 7 55
+45 5
22 14
+21 7
+33 4i
+69 56
9
9
9
9 I
9
9
4
9
9 I
9
9
071
I'oo
0/98
I'OO
0'99
0'44
0-98
o'8o
I'OO
0-95
0-86
I'OO
0-98
0*91
0-66
076
0-99
072
0-93
I'OO
0-99
0-89
I'OO
0-87
0-43
0-84
0'99
I'OO
o'86
o'97
Too
o'86
0*96
0-59
0-99
0*91
I'OO
0-99
0-76
0-40
0-97
I'OO
0'97
0-99
0-99
0-96
071
0-98
0'99
0'97
I'OO
I'OO
I'OO
0-99
0-44
0-89
079
0-98
0-86
o'8o
I'OO
0-95
o'86
0-99
0-98
0-66
h m s
1516 471
1541 37-22
15 43 52-48
15 46 32'8i
1548 6-32
15 5036-52
16 ii 21*59
105944-41
II 2 8-37
ii 6 i6'6i
ii 9 3-12
ii ii 3-44
1115 2o'o8
ii 1 6 3876
112740-34
ii 30 23-98
" 34 7 - '7
ii 39 8-23
1143 2-40
ii 46 14*92
II 47 4621
11 50 50-60
12 2 24-54
12 7 16-76
12 949'59
12 1246*51
12 17 5*OO
1226 59*62
1251 58*74
12 5252*07
125930*24
12 52 4*07
I25345'43
13 26 11*98
13 31 58-20
13 3M5"5'
13521979
135856-27
14 4 16*94
14 12 8*96
143031-32
14 38 26-36
1440 9-39
1443 34-62
15 236-23
15 13 59-04
15 16 12*42
1523 11*93
1526 9-81
152950-43
154144-68
'543 59'99
154640-39
1548 13-88
'5 545"39
16 i 57*74
1 6 240*06
16 ii 28'92
1058 8*68
105953-01
II 2 16*28
II 624*84
u 9 10*84
n ii 11*33
ii 15 28*22
ii 27 49-26
28-18
58-50
13-88
54-40
27-51
2-63
42-64
579
27-59
36-96
21-52
22-92
39'99
57-18
2*64
42-18
26-02
29-80
22-63
34'8
5-18
11*09
43'59
35*18
14-41
7-29
23-91
19-21
19-32
iro8
49'43
19-29
0-39
27*94
1276
o"j6
34-18
10-45
31-68
23-96
45-88
4076
23-58
48-89
13-24
28-18
26*69
24-45
5-20
13-91
54-43
27-54
2*63
11*07
54*89
42-69
2 I "06
5'6 9
27-54
36-90
21-48
22-89
2*50
S
+'39
+0*13
(+0*14
+-'5
1+0*1 2
+0-61
1+0-08
o'oo
o'oo
o'oo
o'oo
+0*0 1
i+o-oi
,+0'QI
i+o*o8
+0*02
+0*05
+0*17
+0*11
+0*06
+0*04
+0-10
o'oo
o'oo
o'oo
c'oo
o'oo
o'oo
+0-09
+0-04
0-04
O'OI
o'oo
+O'O1
+O'OI
+o'o6
+0*04
+009
+0'I2
+0-04
+0-03
+0'O2
+O'O2
+0-04
o'oo
o'oo
o'oo
o'oo
o'oo
+0-06
+o'o6
+0*07
+0*05
+0-28
+0'02
+0-08
+0*03
o'oo
o'oo
o'oo
o'oo
o'oo
o'oo
o'oo
o'oo
Montreal.
0-13
0-05
0-05
0-05
0-24
0-05
2 37 8 75
at I4 11
( o a -no)
i -oo da+dt+'2o =
+' 6 3 ,. +'3 =
+06 =
'06 =
+0-52
+0-48
+0*5
-2-62
+075
+ 09 =
28 =
Montreal.
+0-15
+0-07
+0'IO
+0-08
+o'7
+0*08
+0-07
0-08
o'O7
o'i8
o*n
0*07
0*07
O*I2
+0-07
+0'o8
+o'34
+0-13
+0-07
+0-07
0-13
o'O7
0*07
at I2l>
( o s *o6o)
[ i7oo]
0*62 da+dt '01 =o
'03 =
o
+0'62
+O'OI
+ I'OO
-j-o'44
+0-25
+0-89
1'2O
+-I 4 =
+'oi =
+30 =
+'7 =
i'i4 da+dt '06 =
[_ i
[-i7oo]
[ i7oo]
(+0-72
10-96
I o'oS
1+0-52
+0-69
0-26
+05 =
+18 =
+'04 =
'03 =
-05 =
+05 =
+o'6o da+dt+'i i =
+1*00 ,, +*o6 =
2-65 .. +'I2 =
0-39 .. + -1I =
+o'7' ,, +'04 =
+0-44 i, -18 =
j 0*35 da+dt+'o4 =
|+o'66 '10 =
1+0-57 ,, " =
Montreal.
+o- 3 i
+0"22
+0' 5 &
+0'1 7
+0'2I
0-18
0-17
0-40
0-82
O'22
0-18
0-17
0'I 7
+0-19
+0-17
+'45
+0'2I
+O'2O
0-17
0-18
0-18
0-17
0-83
0-18
'33
0-17
2 m 45 s '28oj 0-35 da+dt "04 =
at 14" l+o'is .. -5 =
1'57 .. '01 =
[_ 8- 4 oo]
[-08-380]
[-o 9 "95]
+071
+o'i7
+o"47 da+dt+"o4 =
+0-69
078
2"6o
+0-15
+0-50
+0-78
+0-69
[18-200]
+08 =
+'04 =
+'15 =
"03 = o
+'oo = o
'IO = O
'05 = o
+05=0
+ 'OI =O
+0-3-; da+dt "16 =
+o'82 ,, '14 =
i-oo +'31=0
+0-17 '04 =
+0-32 ,, -08 =
+o'io ,, +'03 =
+0-63 da+dt '07 =
+0-51
+0-48
+0-65
2-62
+0-96
0-45
+076
+'oo = o
*o8 = o
+'09 =
+*oo = o
+*oo = o
+'io = o
'19 =
Montreal.
-0-49
-0-58
-0-27
-0-38
-0-29
-0-29
-0-32
-079
2 m 478-680
at I2 h
( o s *ioo)
[->
0'62
+0-62
+0*01
+ 1*00
+0-44
+0-25
I'2O
+'4
'OI
+03
09
+05
'10
03
Mean value of dt "'014, Wt. 24^06
3*656 da +i'949 dt + 3 ' 1 24 =
i '949 da +5 -599 dt+ "174 =
8 'O22,
8 'O23'O2&
+01 j
08 ;
'12 2-905 dn +i'86o dt + S 'zo6 = o
+'05 ' r86o da +6-506 dt + '220 =
'03 |
'ii | S 'o6o,
+'5
+07
+03
"OI
03
= o '03
= o '03
= +'09
-o| +'03
= o;+'o 3
= o +'07
+'02
'20
2-528 da +1-791 dt S 'i59 = o
1-791 da +5-713 dt + "098 =
+8-097,
3-209 da +1722 dt + S 'o28 = o
1722 da +4-627 dt + -i 10 =
+8-005,
oo 0-824 da +0-933 dt 8 'i36 = o
+'oi 0*933 da +2*680 dt "181=0
oi + 3-I 4<>. + 8 'oi7'oo6
Mean value of dt a '024, Wt. 19-53
-02
06
+04
+04
+04
+02
+'.2
+ '0.
+04
'IO
07
+02
'O2
09
+ '06
+ 02
'Ol
'OI
+04
-03
+03
05
+'3
04
+04
1-487 da +0-157 dt + s "O73 = o
0-157 da +3'8i7 dt + '036 =
1-048 ,
3-425 da +2-335 dt +"''37=
2-335 da +6-580 dt + -085 =
"'041,
+ a 'OO2'O20
1*392 da + i'i8i dt "'344 =
i 'i 8 1 da +5*287 dt '216 =
+ 8 '262,
8 -oi8-oi8
4*019 da +2*945 dt 8 'i94 = o
2-945 da +6*550 dt '184 =
-15
'04 = I '05
+'02 = +"06
-09 = '07
-01 = 9 'oi
+'O8 = 'OO
Menu value of dt S *oo2, Wt. 22*24
2*352 da +0*843 dt S *i2i =o
0*843 da+6'398 dt+ '012 =
+ 8 '5 5 1 I
at
at i2 h
at i4 h
STAR-TRANSITS OBSERVED BY PROF. MLEOD WITH TRANSIT B., AND RESULTING CLOCK ERRORS.
OBSERVATIONS AT MONTREAL AND GREENWICH.
91
Name of Star.
Dec.
i
Observed
Transit.
Tabular
Apparent
K.A.
Corrections.
Level.
Collima-
tion.
Assumed
Clock Slow
(Hourly Rate)
[Azimuth].
Equations of
Condition.
11
n
Normal Equations and Solution.
da.
dt.
Clock Apparently
Slow.
1892 May 13 continued.
Hydra)
v Leonis
3 Draconis
X Urste Majoris
$ Leonis
Virginis
y UrssB Majoris
o Virginia ..
4 H. Draconis
5 Ursse Majoris
17 Virginia
20 Comae
8 Can. Ven
24 Coma; (2nd star)..
76 Ursse Majoris
t Virginia
8 Virginis
$ Comas
Groomb. 2001
C Virginis
T Bootis
7) Ursse Majoris
ij Bootis
T Virginis
31 16
o 14
+67 20
+48 23
+ 15 II
+ 2 22
+54 >8
+ 9 20
+78 ,3
+57 38
04
+21 30
+4' 57
+ 18 58
+63 ,8
E j +11 32
E i 4 58
E | +28 26
E 1+7257
El o 3
E !+i8 o
E +49 5'
E +18 56
E + 2 4
1892 May 14.
18 Ursae Majoris.
a Ursse Majoris..
X Leonis
i|< Ursae Majoris.
S Leouis
J Crateria
a Leonis
\ Draconis....
/3 Leonis
ft Virginis
y Ursse Majoris.
o Virginis
e Corvi
4 H. Draconis...
8 Corvi
K Draconis
76 Ursae Majoris
( Ursse Majoris
a Can. Ven
f Virginis
6 A f irgiuis
# Cornse
r Bootis
i) Ursae Majoris..
ri Bootis
T Virginis
a Draconis
d Bootis
4 Ursae Minoris.
1892 May 16.
Virginis
d Bootis
K Virginis
4 Ursse Minoris
Bootis
Bootis
Bootis
Virginis
' 2 Libra;
Ursae Miuoris.
+56 58
+62 20
+ 7 55
+45 5
+21 7
14 ii
+ 6 37
+69 56
+ 15 1
+ 2 22
+54 18
+ 9 20
22 I
+7 <3
-iS 55
+70 23
+63 18
+5633
+38 54
+ 11 32
- 4 5
+28 25
+18 o
+49 5'
+18 56
+ 24
+ 6 4 53
+25 36
+78 3
+ 2 4
+25 36
9 46
+78 3
+ 52 21
+3 5'
+16 53
- 5 'i
-15 36
+74 3 6
1892 August
15.
o Aquarii..
t Pegasi . . . ,
24 Cejjkei..
y Aquarii.,
-o 51
+24 49
+71 48
- ' 55
076
0-99
072
0*91
I'OO
0-95
0-89
I'OO
o'86
0-99
I'OO
0-97
I'OO
0'79
I'OO
0-97
0-99
0-59
0-99
I'OO
0*92
I'OO
o' 99
o'86
o'8o
I'OO
0-95
I'OO
O'92
I'OO
o'66
I'OO
0-99
o'88
I'OO
0-87
0'44
078
o'86
0-97
I'OO
0-97
0-99
I'OO
0*91
I'OO
0-99
076
0-99
0-44
o' 99
0' 99
0-95
0-44
0-99
I'OO
0'97
0'92
0-54
0-99
I'OO
o'63
0-99
h in s
II 30 31-14
ii 34 14*62
ii 39 15-48
"43 9'83 I
II 46 22'23 j
"4753'49,
11 5057-79]
12 23I -L 86
12 959-20
12 12 5476
12 17 12-97
1227 7-83
12 31 2677
12 32 32-87
12 39 41-18
125937-61
13 7 11-42
13 939-68
13 26 12*98
1332 1-33
'34457'4
1 3 46 6*84
13 52 22-46
13 58 59-11
10 58 10-03
10 5954-16
11 2 18-43
11 626-52
II II I3'52
II 16 48*1 1
ii 18 25-63
11 27 50-59
n 4625-23 i
"47 5 6 '58
1151 1*50
12 234-38
12 7 26-41
12 10 3-93
1227 8-70
1231 4474
12 3943*04
1252 8-96
12 53 50-46
12 59 40-10
13 7 i3'76
13 942-13
1345 0-62
13 46 lo'oi
135225-47
1359 2-02
14 421'44
14 821'39
14 12 I I '43
'359 7'86
14 826-82
14 10 7'i4
14 ii 15-86
14 24 28-84
14 30 8^36
1438 37-07
14 40 20*47
>447 5273
145358-92
21 5953-48
22 i 38-28
22 725-31
221543-97
42-14
26-00
29-69
22-57
34''5
5-16
11-04
43'57
14-19
7-22
23-89
19-19
38-69
44' 1 2
53-82
49-41
22-73
51-65
27-91
1276
9'37
19-58
34-18
10-45
21-04
5-66
27'53
36-89
22-87
S7-J3
34-84
2-46
34''5
5"'5
1 1 '02
43'5 6
35''5
14-11
17-63
56-30
5379
19-25
0-38
49-41
2273
51-64
9'37
'9'57
34-18
10-45
31-66
30-19
23-89
10-46
30-19
9-50
23-81
12-44
40-77
23'59
5578
1675
''35
47-12
7-23
o'oo
o'oo
o'oo
-O'OI
-0'02
-0*03
-0-07
-O'O2
o'oo
o'oo
o'oo
o'oo
o'oo
o'oo
o'oo
o'oo
o'oo
o'oo
o'oo
o'oo
+0'OI
+0'02
+0'OI
+O'O1
-o'i8
-O'2I
-o'o8
-0*13
-o'o8
-0*04
-o'o6
-o'ig
-0*05
-0-03
-0-05
o'oo
o'oo
-O'12
-0'O2
-O'll
-0*04
-0-04
-0*04
-0-03
-O"O2
-0-03
0-03
0-05
O'O2
0'02
0-07
0*03
0'12
0-03
+0'O2
+O'OI
+o'o8
+o'o6
+0-04
+0'0 4
+O'02
+O'O2
+0'I2
+0'OI
+0'O2
+o'o6
+O'OI
Montreal.
+0-31
+0-27
+070
+0-41
+0-28
+0'2
+0'4'
+0-2;
I'll
0-4"-
0-23
0-25
0'3'
0-24
-0-51
+0-23
+0-23
+O'26
+0-78
+0-23
+0-24
+0-36
+0-24
+0-23
+o'6o
+071
+'33
+o'47
+'35
+'34
+o'33
+0-96
0-34
0'33
0^56
o'33
0^36
1-62
+o'i 8
+o'5>
+o' 3 8
+0-31
+O'22
+0-17
+0-17
+0-19
O'lS
O'2&
O'lS
0'17
0*40
o'i9
0-82
0-27
o'3o
0-27
1-30
+0-44
+0-31
+0-28
+C'2 7
+0-28
_ 2 m 478-680
at i2 h
( o s 'ioo)
[-I 8 ' 45 o]
+071
96
o'o8
+0' 5 2
+o'6 9
0'26
+o'6o
i'i4 da+dt+'03 =
+ '22 = O
+-24 =
+'13 =
-O7 = O
"09 =
"14 =
"OI =O
2*65 da+dt+'o3 = o
0-39 ,, -01=0
+0-71 ,, +'I2 =
+0-44 ,, +'02 =
+0'o8 ,, '07=0
+0-47 +-io = o
0-68 ,, +'o8 = o
+0-57 da+dt '09 =
+078 +-n =
+0-33 ii +'06 =
'57 +'07 =
+071 ,, +'05 =
+0-49 .. +'02 =
O'I2 ,, '08 =
+'47 > +'04 =
+0-6 9 +!! =
Montreal.
2 m 5o s 'i7o
at i2 h
( o s 'ioo)
[ i s '4co]
0-37 da+dt
0-62
+0-62
+o"oi
+0-44
+0-89
+0-63
i '20
-14 =
'20 =
+ '21 =
'12 =
'07 =
'14 = O
O
o
:0
O
O
e
o
+0*52 da+dt+'i2 = o
i+o'68 +-38 =
[ o 8 '8oo] 10-26 ,, '08 =
j+o'6o ,, '16 =
|+i'oo '09 =
2'65 +'oo = o
+o'9i da+dt+'O7 =
,1-25
0-68
-0-35.
+0-15
+o'57
+078
+o'33
'06 =
+'08 =
+'io = o
'15=0
'03 =
+'07 =
+'OI =0
+o'4 9 da+dt+'oo = o
[ i' 4 oo]
O'I2
+'47
+0-69
078
+0-38
2'6o
06 =
+08 =
+04 =
+ 02 =
+ 05 =
-16 =
Montreal.
2 m 558750
at i4 h "4
( o s 'ioo)
[-1-850]
+0-69 da+dt+'og = c
+0-38
+083
2'6o
[ i
'06 = c
s
+03
+ '2 I
-j-'II
+ 07
9
"IO
-17 I
03 : + 8 '047,
2^847 da+2'336 dt ''028 =
2'336 da+6'599 dt+ '192 =
+02
'03
+'06
'03
'II
2-612 da+o'538
0-538 da+5'445 dt+ '214
+ 05 "-028,
13
+07
+03
+06
'OI
08
+01
+07
3'3O2 da+3'3io dt+ 8 "i6i =o
3'3io da+8'076 dt4 '254 =
"03 1,
3 'oi9 8 'oi8
_ z m 47^707
at i2 h
Mean value of dt B- 027, Wt. 26-52
-'5
-18
+'5
'5
+16
'1 1
+03
+07
+'33
09
'21
-I4
03
+ 06
+'09
-16
04
+06
04
05
+04
'01
+04
2^624 da +i'257 dt+ s- i04 = o
i '257 da +6*564 dt + '307 =
-"019,
3-258 da +1-823 dt +"'167 =
1-823 da +4'75 dt + '205 =
034,
2750 da +i '337 dt +"'040 =
i '337 da +6-460 dt + '055 =
s 'on,
3 'oo6'o23
2728 da
o "959 da +5 '559 lit + '108 =
"'054,
S 'OIO'OII
+12=0 I +'05
'IO = O | +'O2
+ '2
-oi '
Mean value of dt "-022, Wt. 23-28
+'04 j 2-530 da +1-298 dt + 8 "i7i =o
1-298 da +3*056 dt + "117=0
o'2o da+tlt+'o6
+0-30 ,, +'oo
-j-O'52 ,, 'O2
+078 ,, +'05
+'9' ., '08
1-82 ,, +-08
= 0|+'02
2 '636 da +i-63&dt 8 '070 =
1-636 da +4-869 dt+ '060 =
= o -oi
= O "O2
= +'o6 i
= o '05 : + 8 '043, 8 '02i-oi3
= o -oi
Mean value of dt '"017, Wt. 7-93
Greenwich.
-O'2l
-o'6i
at 22 h
( 8 -o 3 o) i'ii
[+"540] "foil
+0-79 ila+dt '06
+o'5
+'00 =
-05 =
"00
"oo
i '988 da +1 '623 dt 8 'io2 =
1-623 da +3 357 dt " 1 39 =
+"028,
2 m 50 a 'I
at I4H
at 22 h
TELEGRAPHIC DETERMINATION OF LONGITUDE.
Name of Star.
Dec.
Observed
Transit.
Tabular
Apparent
K.A.
Corrections.
Level.
Collima-
tion.
Assumed
Clock Slow
(Hourly Bate)
[Azimuth].
Equations ol
Condition.
11
I'S
Normal Equations and Solution.
Clock Apparently
Slow.
da.
dt.
1892 August 15 continued.
C Pegasi...
Pegasi..
Cephei. . .
Pegasi . .
Cephei..
Aquarii.
+10 16
+29 39
+65 38
+27 30
+74 48
- 6 37
1892 August 16.
o Sagittarii .
Aquilse
IT Sagittarii .
S Draconis...
u Sagittarii .
T Draconis ..
0- Cygni ....
a Aquilse
Cephei .......
ft- Capricorni.
p Capricorni...
Delphini .....
o Cygni ........
21 54
+ <3 42
21 12
+6 7 28
16 10
+73 9
+27 44
+ 35
i 8
+77 *3
15 7
18 10
+10 56
+44 54
1892 August 18.
Cephei...
IT Cephei . . .
y Piscium..
J/ 3 Aquarii .
Pegasi....
y Cephei
19 Piscium
20 Piscium
Piazzi XXIII. 200
<f> Pegasi
a Piscium
29 Piscium
2 Ceti
33 Piscium
Cassiopeise
2 1 Cassiopeiae .
y Cassiopeise.,
H Cassiopeia.,
Andromeda?.,
+65 38
+74 48
+ 2 41
IO 12
+22 4 8
+77 2
+ * 53
3 22
to 35
+ .8 3,
+ 6 16
- 3 38
17 57
619
+58 33
+14 35
+74 *4
+60 8
+44 23
+35 3
1892 August 20.
y Lyrae
o Sagittarii..
Aqnilse
ir Sagittarii.
S Draconis...
r Draconis..,
b Aquilae
6 1 Cygni
S Cy^ni
8 Sagitta;
a Aquilffi
a 1 Capricorni..
a- Capricorni...
ft 2 Capricorni..
y Cygni
69 Aquil?e
Cephei
73 Draconis....
( Cephei...
y Aquarii.
Pegasi...
IT Cephei..,
+32 33
2i 54
+'3 42
21 12
+6 7 28
+73 9
+ " 43
+27 44
+44 52
+ 18 16
+ 8 35
-12 51
19 27
15 7
+39 35
3 15
+62 38
+74 35
+57 4
- , 56
+27 3
+74 48
I'OO
0-99
0-76
0-99
0-56
'95
0-85
I'OO
0-85
0'73
0-89
o'6o
0-99
I'OO
0-98
0*48
I'OO
I'OO
I'OO
0'95
0'77
0- 53
0-99
0-83
I'OO
0'49
I'OO
0'99
0'95
I'OO
I'OO
0'97
o'88
0*96
0-86
I'OO
0-56
0-84
0'94
'94
0-98
0-85
I'OO
o'86
073
o'6o
I'OO
0-99
0-95
0-99
I'OO
0-92
0-86
o'88
0-97
0*96
o'8i
0-57
o'86
0-97
0-99
0*56
h m s
223543-26
2237 35'8
224529-97
22 58 II'I7
23 4 8-27
23 8 22-61
18 57 52-68
19 o 6-48
19 3 0-48
19 12 13-27
19-15 12^46
1917 20' 1 8
19 26 1-93
1945 10-34
20 5 23*66
20 12 I3'IO
20 1436-34
2O 22 21'86
20 27 42*87
20 37 24-70
2245 31-67
23 4 I0 '79
23 " 14-44
23 13 I'oo
23 '9 39"57
23 34 40*66
234033-03
2342 4'7
234421-04
23 46 40*36
235326-51
23 55 57' 8 4
23 57 53'4
235929-07
o 3 6-87
o 7 2i"o6
o 38 13-80
49 52-28
1 045-96
i 321-30
185435-29
185753-83
19 o 7-78
19 3 i '6 1
19 12 14*69
19 17 21-62
191930-30
1926 3-16
19 41 16-72
19 42 15-10
1945 11-70
20 1 1 20*74
2O 12 50-92
2 '43775
2O I S 2*00
2O 23 41*38
202727*58
20 32 38*09
22 648*91
22 15 46*16
22 58 1379
23 5 12-29
6-92
58-70
52'9I
34'57
31-29
46*17
5'35
28-94
23-10
34-22
35-02
4'53
24-16
33-19
46-44
34'83
59'35
44'87
5 -60
47'3'
52*96
31-38
36-46
23-14
1-65
58'95
54^5
2578
4271
.'83
48-22
19-70
15-02
50*82
27-52
42-68
34^3
13*92
7-67
43''7
5626
15*31
28*90
23*07
34-05
40-33
51-42
24*12
36-51
33-17
42-39
12*49
59'34
23*36
2-82
4872
58-81
9-06
7-28
34^5
31-42
Greenwich.
+0*02
+0*02
+0*05
+0*02
+0*07
+O'OI
O'O2
0*06
O"02
0-18
0-03
O'22
0*07
0-05
O'O4
0*29
0*03
0-03
0-05
O'lO
+0*19
+0*22
+0*46
+0*21
+0*72
+0'I9
at 22 h
(- "030)
[+o s '54]
+0-67 da+dt '14 =
+0-42 ,, "21 =
0*59 ., +'19 =
+0*46 ,, +'oi=o
1*51 '11=0
+0-85 ,, +-04=0
Greenwich.
0-24
-0-23
0-24
0-57
0-23
076
0*25
+0*22
+O*22
+ I'OI
+0*23
+0*23
+O*22
22 B '2IO
at 2o h
( 8 *020)
[+o'6 4 o]
[+08-640]
+1-03 da+dt "04 =
+0-63 *ii =o
1*02 ,, +*OI=0
072 +'07=0
+0*96 ,, +*02 = O
1*27 ,, +*07 =
+o'45 ,, '04 =
+0*68 da+dt '03 =
+0-80 ,, +-12 =
2"OO ,, 'o8 = O
+o'95 .. '00 =
+o'99 .. +'3 = o
+o"66 ,, +"06 =
+' I 7 i> *io = o
Greenwich.
-0*14 +0-58
-0*18 +0*91
-0*03 +0*24
-O'O2 +0*24
-0-04 +0-26
-O'I2
-O'OI
-O'OI
-O'OI
-O'OI
-O'OI
-O'OI
-O'OI
-0'O2
-O'OI
+0-03
+O'O2
+O'OI
-j-O'OI
0'O2
o'oo
O'OI
o'oo
o'oo
+0-03
+0'OI
-j-O'OI
+0-03
+O'O2
+O'OI
-{-O'OI
+0*O I
-j-o-or
+0-05
+0'02
+0*08
+0-14
+o'i3
+0-04
+0'II
+0-42
1-07
0-24
O'24
0-24
0-25
0-24
0-24
-0-25
0*24
0-46
0-25
+0-89
+0-48
+o'34
+0-29
2I'26o
ato h
( S '020)
[+o" 9 oo]
[+o' 9 oo]
o'59 da+dt 'n =o
1*51 +*o6 = o
+75 +" I 5 = o
+0-90 ,, -(-'17 =
-j-0'52 ,, '12 =
i '92 da+dt+'o7 = o
[+08-900]
+75
+0-8 1
+o' 9 o
+0-58
+072
-j-0'82
-fo'99
+o'8 5
0-23
+0-62
+08 =
+04 =
+'16 =
+'04 =
'06 =
+'03 =
"07=0
i '45 da+dt+'o4 = o
9'3' .. '17 =
+0-17 .. +"03 = o
+0-34 '01=0
Greenwich.
0-28
O'26
0-25
O'26
0*63
0-83
O'24
0-27
+'34
+0-25
+0-24
+0-24
+ 0-25
+0-25
+0-31
+0-24
+0-52
+0-90
o' 45
0-24
0-27
0*91
2O 8 '72O
at22 h
( 8 '020)
[+I S '020]
+0-38 da+dt 'ii=o
1-03
+0-63
I'O2
072
1-27
+0'6 5
+o'45
[+08-670]
[+08-800]
+09 =
+04 =
+*io = o
+05 =
'04 =
+08 =
+'oo = o
+0-17 da+dt 'i 8 =
+0*58 ,, +'oi=o
+0*68 ,, +-oo = o
-j-0'93 . '02 =
I'OO , +'H =O
+o'95 . +'o6 = o
+0*26 , *o8 = o
+0-81 , +-n=o
0-42 , '07=0
1-48 +'07 =
0-20 da+dt+'io = o
+o'8i +'05 =
1-51 '14 =
*o8
-16
+'5
+06
*o8
+11
2*418 da +i'493 dt " 1 57 =
1*493 da +4-754 dt -227 =
+8*044, + S " o 34"t 43
228-992 at 22 h
Mean value of dt +8*032, Wt. 8'n
09
+04
+02
05
+10
+03
03
*oo
+05
3-688 da +1-480 dt 3-109 =
2-480 da +5-098 dt '089 =
+8-027,
+ 3 'oo4 '01 6
4-352 da +3'745 dt + S 'i68 = o
3 745 da +6 -093 (It + '073=0
Mean value of dt +"'015, \Vt. 11*19
05
+08
+09
-j-'o8
-16
+04
-j-'o8
+'04
+'5
+04
06
'12
'09
05
06
+05
-ii
+06
2-223 da +1*105 dt + 8 'i66 =
1*105 da +3'543 dt + 8 *o99 =
S '72|
""005 '046
6-141 da+5'956 dt 8 *oo2
5-956 iia +9*499 dt ''022
''005,
0*852 da O'22I dt + S 'O22 =
0-221 da +2786 dt 8 'o88 = o
8- oi8,
Mean value of dt 8 'oo7, Wt. 15*83
13
+03
'00
+04
+06
+-oi
+'04
'03
04
+'07
+'03
*o6
+10
'OI
+'07
'03
'OI
-05
3 '566 da +2*750 dt + 8 *i8o = o
2750 da +6-296 dt-j- '175 =
-"043,
8 '009 'o 1 8
4-490 da +3 '903 ill +8-133 = o
3-903 da +8'o86 dt '046 =
S 'o6o,
+ S '035-o20
i "587 da +0-599 dt 8 "H5 =o
0-599 da +2-974 dt + '131=0
8-060,
STAR-TRANSITS OBSERVED BY PROF. MLEOD WITH TRANSIT B., AND RESULTING CLOCK ERRORS.
OBSERVATIONS AT GREENWICH.
93
.Name of Star.
Dec.
Observed
Transit.
Tabular
Apparent
R.A.
Corrections.
Level.
Collima-
tion.
Assumed
Clock Slow
(Hourly Bate)
[Azimuth].
Equations of
Condition.
II
as
Normal Equations and Solution.
da.
dt.
Clock Apparently
Slow.
1892 August 20 continued.
Bradley 3077..
y Piscium
i Andromedse..
y Cephei
21 Piseium
<f> Pegasi
a> Piseium
29 Piseium
4 Ceti
+56 34
+ 2 41
+42 40
+77 2
+ o 28
+18 31
+ 6 16
- 3 38
39
1892 August 21.
$ Cygni..
8 Aquilie .
K Cephei..
e Aquarii .
20 Capricorn!
8 Capricorn! ..
Bradley 2777 .
a Eqiiulei
a Cygni
fi Capricorui .
a Aquarii
i Pegasi
Pegasi
24 Cephei
8 Aquarii
rj Pegasi
o Andromedse.
Cephei
+52 9
i 9
+77 23
9 53
19 Z 7
17 40
+77 4'
+ 4 48
+38 56
14 4
o 50
+24 49
+ 5 4
+71 49
8 19
+29 40
+41 45
+74 48
1892 August 22.
no Herculis..
Aquilae
5 Draconis
Cygni
Ij Aquilee
Cygui
y Aquilie
$ Sagitt ._...
y Sagittae
Cygni
7 Cygni
e Cephei
3 Delphini
a Delphini
a Cygni
Bradley 2777..
o Andromedse.
a Pegasi
IT Cephei
Aquarii
ij/ 1 Aquarii
v Pegasi
+20 27
+'4 55
+67 28
+53 'o
+" 43
+27 44
+ IO 21
+ 18 16
+ 19 12
+46 25
+39 55
+62 38
+M '3
+'5 3 2
+44 54
+77 4
+4' 45
+14 38
+74 48
6 38
9 41
+22 48
1892 August 23.
20 Cephei.
Pegasi...,
f Cephei ..,
7 Lacertae.
Cephei...
S Aquarii .
o Andromedse.
a Pegasi
ir Cephei
4 Cassiopeise. . .
+62 16
+ 54
+57 4
+49 44
+65 38
16 23
+4' 45
+14 38
+74 48
+61 41
0-83
0-99
0-96
0-49
0-97
I'OO
0-99
0-96
0-96
0-91
0-97
0-47
0-94
0-86
0-86
0-47
0-98
0-93
0-91
0-98
I'OO
0-99
0-63
0-95
0-99
0-96
0-54
I'OO
I'OO
0-71
0-90
0-99
0-99
I'OO
I -00
0-99
0'93
0-97
075
I'OO
I'OO
0'95
0-47
0*96
I'OO
0-56
0'95
0-94
I'OO
o'8o
0-99
o'86
073
o'go
0-97
I'OO
'55
0*76
h in s
23 746-37
23 II 15-02
233231-29
23 34 3772
23433 6 '55
234640-47
23 5326-73
23 5658-19
o i 53' 2 4
195231-32
20 5 24-89
2O 12 I4'O2
2041 31-06
2053 9-63
21 7 24*82
21 IO 7"O2
21 12 52*02
21 47 5-92
21 5955^1
22 I 40*18
22 4 26*34
22 725-81
22 1049*44
223738-14
22 56 39-05
23 4 12-15
1 8 40 41*84
18 5424*36
19 12 14*17
19 14 1809
I 9 I 9 30*39
1926 3'I 7
19 40 4876
1942 15*58
I95339'IO
20 9 56*20
20 l8 3'22
20 27 29*62
20 32 10*98
20 34 19*12
203727-23
21 7 26-58
2256 39-32
2259 4-55
23 4 14-49
23 825-33
23 955'53
23 1 9 4 1 "20
22 I 25*98
22 426*54
22 6 48*70
22 26 32*48
2245 33-20
2248 36*73
22 56 39*61
22 59 4*82
23 4 14*06
23 19 4<>'2O
777
52*64
59*02
58*06
1*86
48-25
'973
'4'53
5 2 '45
46*42
52*48
30*78
5 5 '46
43*09
28*03
12*81
27*13
16*80
1-39
47-60
47'i3
10*78
5877
59'55
46*27
47*61
9*07
5 3 '2
59'57
25-30
31-48
2*83
45'33
33'97
38*44
51*40
24-10
979
36-49
59'47
i6'io
23'35
48-68
31-39
39*67
47'27
43*06
25*29
31*46
46*28
16*68
1*70
+0*22
+0*09
+0*20
+0*64
+0*1 1
+0-15
+0*13
+0*10
+0*10
+0*08
+0*03
+0*25
+0*03
+0*02
+0-03
+0*29
+0*0 5
+0*10
+0*04
+0*05
+0*09
+0*06
+0*27
+0*05
+0*10
+O*I2
+0'32
-O*I4
-0*13
-0*45
-0*30
-0*14
-0*19
-0-14
-o'i6
-0*16
-0*25
-0*22
-0-34
-O'I2
-O'I2
-O'2I
-o'5o
-0*18
-o'n
-0-49
-0-07
-0-07
0*13
-0*06
-0*15
-0*14
-0*26
-0*04
-0*16
-o'io
-0'42
-0-25
Greenwich.
+0-44
+0'24
+'33
+ro 7
+0*24
+0*25
+0*24
+0*24
+0*24
20*720
at 22 h
( S *020)
[+08-540]
o'i6 da+dt '14 =
+075
+0*20
1*92
+0*78
+0*58
+0*72
+0*82
+0*8 1
'03 =
'03 =
+07 =
'05 =
+ *OI=O
'07 =
08=0
+17=0
09
'OI
'00
+'06
'03
+'03
05
*o6
+18
4-135 da +3*874 dt s ' O 6i = o
3 *8 74 da +7 '595 dt '174 =
8*013,
+ 8 'O30'O2I
Greenwich.
+0-39
+0-24
+ !*IO
+0*24
0-25
-0'25
1*12
O'24
-0*31
+0*25
+0*24
+0-27
+0-24
+077
+0-24
0*28
0*32
0*91
20'66o
at 22 h
(o s 'ooo)
[+08*800]
[+08*800]
[+o 3 '5oo]
[+o*5oo]
o'o2 da+dt '08 =
+o'8o '02 =
2*00 , ' 1 9 :
+o'9 n +''7 =
i'oo da+dt+'oi =
+0*98 ,, +'04 =
2-07 -17-
+O'72 *O2 =
+0'27 '17 =
+o*9 4 da+dt+'i5 =
+79 .. +'oo =
+'5 i. +00 =
+072 ,, +'oo =
i'ii ,, '24 =
+0*87 +*oo =
+0*42 da+dt+'oo =
+0*23 +*oi =
''S 1 '04 =
2*215 da +i'O9& dt + 8 '2o8 = o
i '096 da +2 '873 dt+ '025 =
"no,
+8-03 3 -037
Mean value of dt + 8 'oi4, Wt. 24*95
04
'07
+03
+10
+'02
+ '04
+ '04
+'01
'09
+ '09
'03
+*0,
*04
*OI
+ *OI
2-953 da+i*934dt +0*057 =
i -934 da +3-525 dt -172 =
079,
3-265 da +3-088 dt + s '225=o
3*o88da+5'o6Sdt + -033 =
--148,
+ 3 *o84*oi6
897 da +0-184 dt+ 3 'oi9 = o
184 da +2-193 dt "001=0
"0*1, + S 'oo*'oo7
Mean value of dt +"'062, Wt. 13-66
Greenwich.
+0-26
+0-25
+0-63
+0-40
+0-24
+0-27
+0-24
+0-25
0-25
-0-35
0-32
0-52
0-25
0-25
0-34
0-32
0-2 5
0-9!
0*24
0-24
O'26
at 2i h
( o s 'oio)
[+i s "ooo]
+0-55 da+dt+'oo = o '04
+0-62
0-72
0-05
+0-65
+'45
+0-67
+0-58
[+i"30o]
+*io = o +*o6
-03 -j-'oi
+"oi=o +'oi
+'06 = +'02
"07 = - io
+'06 = +'02
+07 = +-03
+o*5 7 da+dt+*09 = o +*o8
o . '05
o 'ii
o I 'oo
o +'15
+O'I2
+0*26
0*42
+0*63
+0*6 1
+0*17
2*07
'06 =
'11 =
03 =
+16 =
+ *oo =
'13 =
+'3 =
+0-23 da+dt -17
+0-62 "02
1-51 -06
+0^85 +'i2
+0-89 ,, '03
+o'52 ,, +'06
2-346 da +3-101 dt +8-159 =
3-101 da +7-274 dt + '215 =
8 ' 6 4,
S 'O02'OI3
2"22O d +1*603 dt + S 'O46 = O
i '603 da +6-472 dt '014 =
'027,
+8-009 -028
"12
+09
13
"O2
+ -5
+10
04
+07
Mean value of dt +"'014, Wt. 18-76
2-787 da +* -434 dt +8-071 =o
2-434 da +5-021 dt -064 =
-8-064,
+8-044 '030
Greenwich.
+0-51
+0-24
+'45
+'37
+0-58
+0-25
0-32
0-25
0-91
-0-51
2O 8 '2IO
at 22 h
( o s 'ooo)
[+o 3 ' 9 oo]
[+o- 9 oo]
0-40 da+dt "10 =
+0*72 ,, "03 =
O'2O ,, "04=0
+O-O5 "o6 =
'59 .. +'17 =
+'97 ,. +'04 =
+0-23 da+dt -02 =
+0-62 ,, '06 =
'37
+'15 =
07
"02
- O2
05
-O2
'02
04
1-580 da +o-8i6dt s- oio = o
0-816 da +4-549 dt '051=0
+001,
+ S -OII"026
i -200 da +0-164 dt 3 * 1 14 =
0-164 da +2-821 dt+ -032 =
+'097, 3 *oi7-t*o*4
Mean value of dt 8 - O oo, Wt. 7-37
20 s> 662at 22 h O m
20 3 '2Ioat*2 h O m
TELEGRAPHIC DETERMINATION OF LONGITUDE.
Name of Star.
Position.
Dec.
No. ol Wires.
i
V
Observed
Transit.
Tabular
Apparent
K.A.
Corrections.
Assumed
Clock Slow
(Hourly Rate)
[Azimuth].
Equations of
Condition.
Weighted
Residual.
Normal Equations and Solution.
Clock Apparently
Slow.
Level.
Collima.
tion.
da. dt.
1892 Augus
1 Cygni
b 2
E
E
E
E
E
E
E
W
W
W
W
W
W
W
W
W
W
W
W
W
; 2(
w
w
w
w
w
w
w
E
E
E
E
E
E
E
E
W
W
W
W
W
w
2*
w
w
w
w
w
w
w
E
E
E
E
E
E
E
W
W
W
w
w
w
w
E
E
E
E
E
E
E
5.
1 '
+27 44
+ 5 9
+'7 13
20 i
+44 5 2
+70 o
i 9
+46 25
12 53
15 7
+62 38
+ 14 '3
+44 54
+6. 25
+7 5
+39 5 6
17 9
+ 9 23
16 37
+*5 2 5
+53 >
+73 9
+ * 54
+27 44
+'7 '3
+ o 44
+52 9
o 50
+24 49
+ 54
+7' 49
-'56
+49 44
o 40
+65 38
+23 9
+61 41
+ 18 3,
+28 30
+58 33
+'4 35
!.
+ '4 55
-2i 54
21 12
+6 7 28
-16 9
+ 2 54
+*7 44
+70 o
+5 2 9
i 9
12 51
12 53
-'5 7
3 15
o 50
+24 49
+ 5 4
+7i 49
8 19
- , 56
+29 40
6 38
9 41
+ 2 41
1O 12
+61 41
+ 12 IO
+77 2
5
9
9
9
9
7
9
7
9
9
7
9
7
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
4
4
8
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
8
9
9
9
9
9
9
0-93
0-99
I'OO
0-86
0-95
0-66
0-98
0'92
0-93
0*90
0-79
I'OO
0-93
0-82
0*67
0-97
0-87
I'OO
0*91
I'OO
o'go
0*60
0-99
0-99
I'OO
0-98
0*91
0-98
I'OO
'99
0*63
0-98
0-93
0-97
077
I'OO
o'8 1
I'OO
0-99
O'gl
0*92
0'99
0-83
0*84
072
0*91
I'OO
I'OO
0^67
0*91
0-97
O'92
O'92
0*90
0'97
0-98
I'OO
0'99
0*62
0-95
0-97
0'99
0'95
'94
0-99
0-94
o'8i
I'OO
0-49
b m s
1926 3-53
1933 33-50
1935 53-60
193945-64
1941 17-58
1948 15-41
20 5 25-69
20 9 56-31
20 ii 46*12
20 14 38-98
zo 27 29-62
20 32 11*21
20 37 27'35
20 42 48*81
21 27 0*91
21 32 19*63
21 334'97
2' 3 8 35' 2 4
21 4047-37
21 47 51-29
19 1419-09
1917 22"O2
'9'945'3'
1926 4*09
'935 54"09
19 46 40*69
19 52 32*86
215956*31
22 I 41*00
22 427-18
22 7 2670
22 15 46-82
22 26 32-44
2229 30-57
22 45 32-42
23 15 o'oi
23 1945*84
23 46 42'12
O 2 30*99
o 3 8*i2
o 7 23*00
18542574
18 5755'47
19 3 3-19
19 12 15-46
19 15 15-26
19 1945-9'
1926 4*66
19 48 15-11
19 52 32*60
20 5 26-43
20 1 1 22*44
20 11 46*42
20 143943
20 23 43*01
5957 - 23
22 I 42*01
22 428*26
22 728*71
22 IO 51*33
221547*84
223739*43
23 8 26*54
23 9 56*88
23 ii 1674
23 13 3*48
23 1945*12
232324*19
23 34 39*00
8
24*06
54-06
14-00
6-43
38-07
34*61
46-41
16*07
6-45
59'33
48*61
31-38
47'25
7-98
18-93
39-61
9-40
55'38
7-69
11-27
38-35
39-98
5-46
24-05
I3-99
0*6 1
52-36
16-83
1-42
47^3
47-12
7^3
53"4
51*00
53'04
*9"93
5*21
1*96
50*67
2772
42*83
45*26
15*24
23*00
33"7'
34'94
5 "44
24*03
34H8
52-32
46-39
42-36
6-43
59'32
2-80
16*84
'43
47*64
47*11
10*83
7'34
58-84
46*36
1676
36'6o
23-28
5'25
44-01
59-29
8
0*14
O'lO
0-13
o'o6
0*24
0-53
O'll
O'2O
O'O5
0'05
0'I 3
O*O2
0*03
0*02
+o'o6
+0-04
+0*0 1
+0*02
+0*0 1
+0*03
-0-15
0*26
0*05
0*07
0*04
O'O2
0*02
+0-03
+0*05
+0*0 4
+0-15
+0-04
+0-09
+0-04
+0-16
+o'o8
+0-17
+0*07
+0*08
+0*1 J
+o'o6
O'lO
0*03
0-03
-0-15
0*02
0*04
0*06
O'42
0*26
0*13
0*09
0*09
0*08
0*09
+0-03
+0-05
+0-03
+0-15
+0-03
+0-04
+0-07
+0-04
+0-04
+0-05
+0-04
+0-17
+0-07
+0-36
<
+0*28
+0*25
+0*26
+0*27
+0-35
+073
+o'25
0*36
0*26
O'26
0*54
0*26
0-35
0*52
o'73
-0*33
0*26
0*25
0*26
0*28
(
-0*45
-0*93
0*27
0*30
0*28
0-27
0*44
+0*27
+0*30
+0*27
+0*86
+0*27
+0-42
+0*27
+o'6 5
0*29
0*57
0*28
0*31
0*52
0*28
c
0*26
0*27
0*27
0*65
0*26
0*25
0*28
+0-73
+0-41
+0-25
+0-26
+0-26
+0-26
+0-25
0-25
0-27
0-25
0-80
0-25
0-25
0-29
+0-25
+0-25
+0-25
+0-25
+0-53
+0-26
+,*,,
rreenwich
1
i9"-88o
at 2i h
( o"*oio)
[+o-8 7 o]
[+o'8 7 o]
rreenwich
198-890
atzz" 1
( o s *ooo)
[+08-650]
[+o<"44o]
[+08-440]
rreenwich
1 98*400
at 22 h
( o s 'oio)
[+o s *6io]
[+o' 5 oo]
[+08-300]
[+o' 3 oo]
s
+0*45 da+dt *i i = o
8
09
+08
+*n
+*10
-29
+16
03
26
+04
+*02
*04
*O2
'19
*04
+-34
''3
+03
+ *I2
+'I2
+'08
Mr,
+03
+ 03
"II
-'5
+05
+18
03
*02
+ *02
+ '04
-oi
+11
-I4
+ 07
*04
*IO
+06
*oo
+*n
*o8
+ *OI
Mea
06
'02
'06
'oo
+05
+-07
+ '01
+07
*o6
'IO
09
+ *02
+07
+11
'IO
'O I
+',0
+*0,
+ 03
+ '02
'04
+ 03
*0 3
*O2
+05
'IO
+ 02
+ '08
2*763 da +2*927 dt + S 'i44 = o
2*927 da +5*883 dt '025 =o
8 *ii9, +8'o63 i o48
4735 da + 4*467 dt+ 8 *i63 = o
4*467 da +10*658 dt "213 =
8-087, + 8 '057-o33
n value of dt +8*059, ^*- l6 '54
2*244 da +i '993 dt 8 'o67 = o
1-993 da +5-919 dt '115 =
"067, +s-o42'o33
3*259 da +2*738 dt + 8 *288 = o
2738 da +6-696 dt+ -040 =
8-127, +8-o46'022
1-251 da +1*663 dt +8-21 1=0
1-663 da +5' '39 dt + '184 =
8*213, +"*033-026
n value of dt +8-041, Wt. 1776
3*626 da +3*649 dt + S 'o23 = o
3*649 da +5-721 dt '050 =
8*042, + 9 'o35*oi6
3-819 da +3*437 dt +8*437 =
3-437 da +5-662 dt + '254 =
"163, + 8 'o54-o26
198*939 at 2I h
i9 8 *93i at 2 h
198*433 at 22 h
ff Aquilae
j8 Sagittae
+0-58 ,, +*i2 = o
+ '00 ,, +'>7 = o
f Sagittarii
e Draconis
o'93 ., +'08 =
+0*80 +*oo = o
6 Aquilse
o 2 Cvffni
o Capricorn!
+"93 .. +'06 =
+0-95 ,. +-5=
2 Capricorn!
& Cephei.. ,
8 Delphini
+0*63 P O2 = O
-j-o'17 ,, '25 =
o'36 ,, '14 =
o'94 M +'37 = o
-|-O*26 ,, 'IJ = Q
17 Cephei
Cephei
74 Cvsmi....
y Capricorn!
Pegasi
+0-&7 +'I2=0
+0-97 ,, +'16 =
+0-49 ,. +'07=0
8 Capricorn!
16 Pegasi
1892 August
K Cvemi , . ..
1*27 ,, '08 =
+"75 . -10 =
+0-45 , "16 =
+0-58 , +-05 =
+0-78 , +-19=0
0*02 , '08 =
+079 da+dt+'o3 =o
+0*50 ,, +'04 =
ft 1 Cygni
ff Sagittaj
17 Aquilse
^ Cygni
a Aquarii
i Pegasi
9 Pegasi
24 Cephei
I'll *OI=O
+0*8 1 +'05 =
y Aquarii
7 Lacer t as
7j Aquarii
+0'79 .. +'I2 =
'59 .. -17 =
+0-52 da+dt "02 =
'37 ,. '04 =
+0*58 +-09 =
+0*44 +'17 =
0-24 "18 =
+0-62 ,, +'n=o
+o'62 da+dt '07 =
i Cephei
r Pegasi
4 Cassiopeiae
a Andromedas....
/8 Cassiopeia
7 Pegasi
1892 August
e Aquilse
o Sagittarii
S Draconis
0*72 ,, '07 =
v Sagittarii
S Aquilse
1 Cygni
+75 " +7
+0-45 *oi = o
e Draconis
<!/ Cveni.. .
9 Aquilae
+o'8o ,, '02 =
+0-93 .. +'12 =
+0-93 .. +'3=o
+o'95 .. +'i8=o
+0-8 1 +'20 =
+079 da+dt '19 =
+'5 .. '09 =
+0-72 ,, +-02 =
I'll +'02 =
+0-87 -06 =
+0*81 '07 =
+0*42 ,, *n = o
o 1 Capricorni
a 2 Capricorni. . ..'....
j3 2 Capricorni
69 Aquilse
i Pegasi
e Pegasi...
24 Cephei
3*500 da +6*148 dt '484 =
+1*045, + 8 *o53*oi8
4-015 da +3'027 dt + 3 '3g6 = o
3-027 da +5-546 dt + '345 = o
8 *o88, 8*oi4*oi9
Mean value of dt+ s *o33, Wt. 23*08
y Aquarii
tj Pegasi
Aquarii
4* 1 Aquarii
+0*89 ,, +*o6 = o
+'75 ., +'06 =
y Piscium
^ 3 Aquarii...
+o 90 ,, +15
-o-37 ,, '15 =
70 Pegasi
y Cephei . .
1*92 ,, *oi=o
STAR-TRANSITS OBSERVED BY PROF. MLEOD WITH TRANSIT B., AND RESULTING CLOCK ERRORS.
OBSERVATIONS AT GREENWICH AND WATERVILLE.
95
Name of Star.
Dec.
S?
a
Observed
Transit.
Tabular
Apparent
B.A.
Corrections.
Level.
Collima-
tion.
Assumed
Clock Slow
(Hourly Rate)
[Azimuth].
quations of
Condition.
1
Normal Equations and Solution.
da.
dt.
Clock Apparently
Slow.
1892 August 29.
(8 Aquilie E
7 Sagittse ' E
6 Aquilee E
p Capricorni E
69 Aquilfe E
6 Cephei E
73 Draconis E
aCygni i W
f Aquarii \ W
?) Cephei
15 Delphini.
W
W
Aquarii | W
32 Vulpeculse j W
TI Capricorni
fl Capricorni
61* Cygni
61- Cygni
Bradley 2777
/3 Pegasi
4 Cassiopeise .
K Piscium
7 Cephei
19 Piscium...
20 Piscium . ..
<p Pegasi
a Andromedse W
7 Pegasi W
fCassiopeiae j W
S Andromedse W
Cassiopeise : W
( Andromedse W
v Andromedse ... . W
+ 68
+ 19 12
' 9
18 10
- 3 '5
+62 38
+74 35
+44 54
9 53
+61 25
+ 12 9
9 24
+27 39
20 17
17 40
+38 .3
+38 13
+77 4'
+27 30
+61 41
+ o 40
+77 2
+ 2 53
3 22
+18 3'
+28 30
+'4 35
+53 <8
+30 16
+74 24
+23 41
+40 29
1892 August 30.
X Uraconis...,
a Lyrre
2 Aquilse
no Herculis.
29 Sagittarii.,
Lyrse
b Aquilse
0-Cygui
K Aquilse
18 Sagittie
e Draconis
i| Cygni
Aquilit
1 Capricorni.
a 2 Capricorni.
a Aquarii .
i Pegasi . . .
24 Cephei.
7 Aquarii.
3 Lacertse.
a Aquarii.
ij Aqunrii.
$ Pegasi
TT Cephei....
< Aquarii...
<|< 3 Aquarii .
70 I'egasi ...
1 9 Piscium .
Pegasi....
+72 4'
+38 41
99
+20 27
20 27
+33 '4
+ '4 55
+ " 43
+27 44
- 7 16
+ '7 '3
+70 o
+5 2 9
i 9
12 51
12 53
o 50
+ *4 49
+7' 49
-i 56
+5> 4i
ii 14
o 40
+27 30
+74 4
6 38
IO 12
+ 12 10
+ 2 53
+ 18 31
1892 September 6.
6 Aquilse
a 2 Capricorni..
7 Cygni
7 3 Draconis . . .
in. Aquarii
19 Capricorni.
32 Vulpeculse..
v Cygni
i 9
ii 53
+39 55
+74 35
9 24
18 20
+27 39
+4 45
roo
0-99
0-98
0-86
0-96
o'8o
0*56
0-95
0*92
071
I'OO
0-94
0-99
0-86
0-87
0-98
0-98
0-47
I'OO
0-82
0-90
0-49
I'OO
0-89
I'OO
I'OO
0-98
o'go
0-99
'57
I'OO
0-97
o'6o
0-97
0-94
I'OO
0-85
0-98
I'OO
I'OO
0'99
0'95
I'OO
0^67
o'gi
0-98
0'92
0*92
0-97
I'OO
O'62
0-97
0*91
0-93
0-99
0^56
0-94
0-94
I'OO
0'99
I'OO
9 0-98
9 i '92
9 j '97
9 '5 6
9 | 0-94
7 o'8 5
5 ! 0-93
8 0-96
h m s
194943-16
'95339'94
20 5 26-67
20 22 24-89
20 23 43-22
2O 27 30^07
20 32 40*69
20 37 28-62
2041 33-13
2042 50-19
20 44 I2"22
2046 33-07
204940-88
2057 58-96
2059 35-96
21 I47-II
21 14874
21 7 26-91
22 58 15-26
23 1946-42
2321 6-73
23 3441-29
234035-36
23 42 6-40
23 46 42'66
o 2 31-84
o 7 23-92
o 30 41-64
033 16*70
o 38 19-27
041 20-31
43 35' 2 7
l8 22 46-34
1 8 33 0*60
18 36 5-27
1 8 4044-47
1842 59-31
184549-38
1 8 54 27-00
191932-48
1926 5'i6
19 30 48*26
'93555''4
19 48 lo'ig
195233-64
20 527-56
2O II 23-29
20 1 1 47-47
21 5958-42
22 M3'32
22 7 30-93
22 15 49-01
22 19 3-61
222440-34
22 29 3274
22 58 l6'IO
23 4i3'4i
23 8 27-62
23 13 4-46
23 23 25-39
234036-17
23 4 6 43'4>
20 245-13
20 9 4-94
20 15 22'3&
20 29 59-43
20 43 51-00
204542-99
2046 5872
20 50 10-35
2'77
59-42
46-36
44-84
2-80
48-54
58-42
47-20
52-47
7-90
31-36
52-41
5974
18-42
5 5 '47
5-84
7'4i
42-79
3474
5-26
26-36
59'3'
54-82
25-96
62-01
5072
42-88
59-90
35'53
35'2i
39-19
5378
171
18-65
23-80
2-72
>7'94
7-27
45'23
51-32
24-00
34'39
52-27
46-38
42-35
6-42
16-85
''43
47-08
7'35
21-36
5873
5 1 '3
3475
31-58
46-38
23-30
44-03
54-84
2'02
46-33
6-37
23-17
58-00
52-38
44-46
59-68
11-03
Greenwich.
-O'21
-0'26
-0'17
-O'Og
-0-15
-0-51
-0'80
-0-30
-O'Og
-0-39
-0-15
-0*09
-O'lg
-0-05
-0-05
-0*19
-0-19
-0-59
o'o8
-0-19
-o'o6
-0-36
-o'oj
-o"o6
-0*09
-O'll
-0*09
-O'22
-O'I4
-0-48
-0-14
-o'i6
+0'22
+0-23
+0'22
+0-23
+0'22
+0- 4 8
+0-83
0-31
0'22
0-46
O'22
0"22
-0-25
0-23
0-23
0-28
0-28
1-03
+0-25
+0- 4 6
+0'22
+0- 9 8
+0-22
-J-O'22
+0-23
0-25
0-23
-0-37
-0-25.
0'82
0-24
0*29
at 22 h
(08-045)
[+08-850]
[+08-850]
[+08-850]
[+08-850]
Greenwich.
-0-50
-O'2O
-0'08
-O'I4
-0*05
-0-18
-0-13
-o'i 3
-o'i6
-0-08
-0-14
-0-42
-0*24
-0*09
-0-07
-0*07
-0*04
-0*07
-O'2I
-O'04
-O'lO
-0*03
-0-04
-0*06
-O'2I
-0*03
-0-03
-0-05
-0*04
-0"O5
1-18
0-45
0-35
0-37
0-37
0*42
0-36
+0-36
+0-40
+'35
+'37
+ I'02
+'57
+'35
+0-36
+0-36
0-28
o' 3 i
0-90
0-28
0-45
0-29
0-28
-l-0'32
+1-07
+0-28
+0-28
+0-29
+0-28
+0-29
+188-170
at 2i h
(-08-035)
[+08-940]
[+8-0550]
[+08-790]
[+08-550]
Waterville.
+0"02
-j-0'02
+0-05
+0'I4
+O'O2
-j-0'OI
+0-04
+0-05
+0-1 6
+0-16
-j-0'21
+o"6o
+0-16
+0-17
+0-18
+o-i6
at 2i h
(+o s '09o)
+072 da+dt+'oo = o
+o'57 '05=0
+o'8o ,, +'02 = o
+o'99 i. +-oo = o
+0-81 +'14 =
o'42 ,, -}-io = o
1-48 ,, -01=0
+0-17
+0-90
-0-36
+0-64
+0-89
+OH5
+0-98
+0-29
+0-29
2-07
+0-46
0-37
+0-78
1-92
+075
+0-8!
+0-58
da+dt '10 =
,, +'06 =
-02 =
+'06 =
+"O2 = O
+05=0
'02 =
"O2=O
+04 =
'33 =
da+dt "07 = o
-05 =
,, +'02=0
ii "20 =
,, +'09 =
+0-44 da+dt '07 = o
+0-62
0-05
+0-42
^+0-51
+0-25
+05 =
'IO = O
-10 =
+'31 =o
"06 =
"03 = o
i '2 1 da+dt+'o7 =
+0-28 '18 =
+0-89 .. +''3 =
+o'55 ,. +'' =
'oi ,, +'15 =
+'37 ,, +" =
+0'62 +'.0 =
+0-65 da+dt "03
+o'45
+0-86
+0-58
0-93
O"O2
+0-80
+0-93
+o'93
-08 =
= o
=
= o
= o
=
^0
'04
+'10
'IO
+08
'06
+05
+0-79 da+dt+'oi =
+0-50
i'ii
+o'8 1
O'OI
+0-90
+0-79
+04 =
-oi =
+11=
19=
+'3 =
+ 13 =
+0-46 da+dt '05 = o
1-51
+0-85
+0-90
+0-64
+075
+0-58
-05
+-06
+'oo
+'04
+"o6
+-02
+0-80 da+dt+'o6 = o
+'93 ,. +'3 =
+O'27 "22 =
''45 ,, +'03 =
+0-89 ,, +'07 =
+0-99 ,, +'13 =
+0-46 '08 =
s
03
08
'oi
"02
-03
07
+02
+-II
04
+ 02
+ 02
oo
06
"OI
+05
06
-II
+01
04
oo
+'7
+ 02
+04
3-576 da +2782 dt +'-078 =
2-782 da +5-555 dt + -153 =
+"004,
4-677 da +4-187 dt +8-245 =o
4-187 da +8-755 dt + '030 =
s-o88,
3-092 da +2-354 dt + 8 '3io = o
2-354 da +5-515 dt + -176 =
8-113,
+-oi6-oi8
1-751 da +1-678 dt "'225 =
1-678 da +6-034 dt -188 =
+13
'10
-05
+07
oo
"oo
Mean value of dt +8-009,
+ 8- '35.
25-85
+08
'21
04
+06
+07
+04
oo
09
05
-oi
+08
07
03
+08
06
oo
+09
+04
'5
+06
06
+03
03
+ 02
2-867 da +2-867 dt +8-245 =
2-867 da +5-867 dt+ '300 =
067,
8'0l8'032
4-106 da +4-368 dt -i5o = o
4-368 da +7-813 dt '231 =
+8-010,
+ s '024 '019
+06
+-o.
'7
+'3
+06
+09
-05
'07
3'242da+3'ii2dt+"'324 = o
3-1 12 da +5'92odt + -234 =
8-124,
3-590 da +3\ _
3-483 da +6-041 dt + -109 =
8-044, +8'oo7'oio
i value of dt +8-oi i, Wt. 25-64
3-725 da +3-488 dt +8-096 =
3-488 da +6-454 dt -117 =
-8-087,
+8-065 '028
188-899 at
i8-i8iat2i h
at 2i h
96
TELEGRAPHIC DETERMINATION OF LONGITUDE.
Name of Star.
Dec.
Observed
Transit.
Tabular
Apparent
K.A.
Corrections.
Level.
Collima-
tion.
Assumed
Clock Slow
(Hourly Rate)
[Azimuth].
Equations of
Condition.
Normal Equations and Solution.
da.
dt.
Clock Apparently
Slow.
1892 September 6 continued.
Bradley 2777.
a Cygni
i Oapricorni..
Capricorni. .
a Aquarii
i Pegasi
Pegasi
( Cephei
+77 4'
+38 56
17 18
22 53
o 50
+24 49
+ 54
+57 40
1892 September 7.
t Aquilae E +14 55
Sagittarii E 21 54
Sagittarii E 21 12
a! Sagittarii E 19
uSagittarii E 16
T Draconis E +73
1 Cygni E
e Aquilse .
o 2 Cygni.
\V
W
it Cephei I W
6 Capricorn!.. | W
7 Cygni W
y
9
+27 44
> 9
+46 25
+77 23
'5 7
+39 55
1892 September 13.
7 Aquilae
8 Sagittse
a Aquilse
6 Aquilse
K Cephei
/3 2 Capricorni..
7 Cygni.
69 Aquite
a Cygni
e Aquarii
jj Cephei
v Cygui
Cygni
a Cephei
j8 Cephei
f Pegasi
ir 2 Cygni
p. Capricorai.
16 Pegasi
29 Aquarii...
a Aquarii ,
i Pegasi
9 Pegasi
( Anclroinedae..
7 Cephei
19 Piscium
<t> Pegasi
u Piscium
29 Piscium
ft Cassiopeise. .
a Cassiopeise. .
21 Cassiopeia?
5 Piscium
77 Piscium
j3 Andromeda..
T Piscium
v Piscium
TJ Piscium ,
40 Cassiopeia .
43 Cassiopeiae .
fCeti
| Piscium
+ IO 21
+18 16
+ 8 35
i 9
+77 23
-IS 7
+39 55
3 15
+44 54
9 53
+61 25
+40 45
+29 47
+62 8
+7 5
+ 9 23
+48 49
14 4
+25 25
17 29
o 50
+24 49
+ 5 4
+42 40
+77 2
+ 2 53
+ .8 31
+ 6 16
- 3 38
+58 33
+55 57
+74 24
+ 7 o
+ 4 20
+35 3
+29 3'
+26 42
+14 48
+72 29
+67 3
10 52
+ 2 40
1892 September 14.
J Cygni..,
a Aquilae.
6 Aquihv!.
o a Cygni .
K Cephei .
7 Cygni...
+44 S 2
+ 8 35
i 9
+46 25
+77 23
+39 55
0-44
0-93
0-88
0-8 1
0-98
I'OO
0-99
0-86
I'OO
0-84
0-84
0-86
0*90
0*60
0-99
0-98
0-94
0-48
0-85
0-97
I'OO
I'OO
I'OO
0*98
0-48
o'go
'97
0-97
0-95
0-94
0-79
o'9i
078
0-75
'53
0-99
'94
o'go
0-94
0-88
0-98
I'oo
0-99
0-96
0-49
0*96
I'OO
'99
0^76
o'86
0-87
0-57
I'OO
0'99
o'gb
0-99
0-99
I'OO
o'6 1
o'66
0-94
0-99
o' 95
I'OO
0-98
0'94
0-48
0'97
h m s
21 445'84
21 IO I2'37
21 13 i5'6i
ii 1731-83
21 57 1572
21 59 070
22 I 4671
22 4 9'3'
18 51 41-84
18 55 11-18
19 o 18-90
19 8 17-53
19 12 3I-IO
19 14 38-18
19 23 2O'6i
20 2 42*89
20 7 13-30
2 934'93
20 ii 55-53
20 15 20-39
193752-23
19 39 18-81
1942 15-43
20 2 2873
20 9 15-20
20 u 41-66
2015 5-40
20 20 45-21
20342971
20 38 35'12
203950-53
204953-59
21 5 5-29
21 12 45*24
21 24 i'68
21 35 38-01
21 3933-21
21 44 9-96
214453*88
21 53 17-42
21 5659-54
2158 44-04
22 I 30-30
233041-36
23 37 37-39
23 5 3'74
2353 2-16
o o io'o6
031 776
035 17-67
03949-38
o 56 58-88
o 25-"
227*59
10 16*76
22 27-02
26 40*93
31 7*41
42 52-50
444271
1938 17-97
19 42 13-26
20 2 26-47
20 6 55-87
20 9 13*86
20 I S 3*38
42-37
1273
16*89
33'M
16-87
1*44
47' 6 7
9-04
45*11
15*11
22*88
21*38
34-83
39'9
23-88
46*32
15-85
23-15
9-56
36-24
32-95
46-25
32-92
59*20
23'5
2*68
46*98
52-38
7'53
10-92
22-62
2-33
18*44
55'3 6
5'47
27-18
11-24
34-80
16-86
1-42
47-66
Waterville.
+0-17
+o'5
+o'oi
-j-0'01
+0'02
+0*04
+0*03
+0-07
075
0*20
0*17
0-17
o'i6
0-18
o"i6
0-30
3 m o s 'oio
at 20 h
(+08-090)
59'55
54-98
2-17
48-58
20-07
28-05
2578
35-80
7'33
16-39
43'75
45-26
34*40
44'73
57'83
24*32
10*29
0*36
37^7
32*93
46-24
1570
32-82
23-03
-0*02
-O*OI
-O'OI
-O'OI
-0*01
-0*06
-O'O2
-O'OI
-0-03
-o'o8
-O'OI
-0-03
-O'll
-O'I2
-O'lO
-0*08
-0-57
-0*06
-0*17
-o'o8
-0*19
-0-07
-0-28
-o'i8
-0*14
-0*29
-0*39
-O*IO
0*07
-0*05
-0*13
0*05
-0*08
0*13
0*09
0-15
-0-44
0*07
0-09
0-07
0*05
0-17
0*14
-0*28
0*06
0*05
0*08
0*07
0*07
0*06
0'22
0-18
0-03
0*05
+0*0 1
-j-O'OI
o'oo
o'oo
0*00
0*01
Waterville.
+0*1 6
+0*1 6
+0*16
+0-16
+0-16
+0-52
+0-17
0-15
O'22
0'69
O'l6
0'20
at 2o h .
(+08*100)
[+10*650]
3 m 178*620
at 22 h
(+OS-060)
[ 08*070]
Waterville.
+0-13
+0-14
+0-13
+0-13
+o'6o
+0-13
+0*17
+0-13
0-18
0-13
0-27
0-17
0-15
0-28
0-38
0-13
0"2O
-0-I 3
0*14
0*14
-0*I 3
0*14
-0-I 3
+0-24
+0'8o
+o-i 8
+0*19
+o*,8
+0-18
+'34
+0*32
+0-67
+0-1 8
0-18
0'22
O"2I
O'2O
0-19
o"6o
0*47
0*1 8
0*18
[ 8 'O2O]
Waterville.
O'2I
0*15
-0*I 5
0*22
0*69
0*2O
1 2*04 da+dt *o6 =
[+08-150]
30- 198*850
at 2o h
(+o s 'oio)
[+0*1 3 0]
+0*29
+0*98
+1-05
+0-79
+0-50
+072
0*19
-07 =
+ 'OI =0
+09=0
'05 = o
'06 =
+05=0
'14 =
+*o6
03
+*o,
+06
04
03
+06
05
Mean value of dt +"-065, Wt. 12-62
3-718 da +3-120 dt +8-062 =
3"i2odt +6-169 dt "175=0
8-070,
3 m 08*07 5 at 2i>>
+0*62 da+dt+'o2 = o
+ 1*03 ,, '05 =
+ 1*03 ,, '09 =
-j-i'oo , +'oi=o
+0-96 ,, +*o8 = o
1*25 ,, +'09 =
+0*46 ,, '12 =
+04
"02
06
+ 03
4*151 da +3*601 dt 8'n6 = o
3*601 da +5*301 dt '098 =o
+03
-ii
+8*030,
S *OO2*O22
+o*8oda+dt+*i6 =
+0*14 ,, '13 = '12 I 2^251 da+i'37i dt +8-141 =
''97 .) +'06=0 +'05 1*371 da +3*738 dt + *o66 = o
+'95 +'12 = +*io
+0*27 ,, *o8=o! '09 8-067, + S *007*044
Mean value of dt + S 'oo2, Wt. 9 '04
+0*67 da+dt+*n=
+0*58
+0*69
+0*80
1*97
+'95
+0-27
+0*82
+04:
'06 =
'03 =
+04 =
'02 =
'5 =
+05 =
o
o +-05
o I -06
o
'+03
03
+0-17 da+dt '12 =
+0*89 ,, *oo = o
'35 +*02 = o
+0-25 '15 =
+'43 >, '09 =
"38 ,, '05 =
0-92 , +'13 =
+0-68 , '04 =
+0*08 , +*o6 = o
+0*94 , +*i2 = o
+0*49 , '07 =
+0*98 , '04 =
+0*79 , +'oi=o
+0*50 , '07 =
+072 , -02 =
+0*21
1*90
+'75
+0- 5 8
+072
+0-82
O*22
0'13
-'43
+071
da+dt -01=0
i> '09 =
ii +"2I=O
Ii +'O2=O
*O7 = O
*O7 = O
'06 =
+'06 =
'o*; = o
+o*74da+dt+*i8 = o
+0*35 --21=0
+0-44 , -09 =
+0-47 , '03 =
+0-62 , "06 =
1-17 , '08=0
071 , +'15 =
+0-90 , '05=0
+0-76 +'06 =
09
+03
+'4
*I2
*0 5
'02
+08
*OI
+08
+14
'04
*OI
+04
04
+ 01
'01
*OI
+-,8
+-oi
'02
06
05
*0 4
+*o6
*o6
4-202 da +4-042 dt +8*035 = o
4-042 da +6*883 dt '064 =
8*040,
+ S '03I"02I
4773 da + 5-375 dt 8-153 =
5'375 ( - a + 1 ''962 dt '320 =
+8'002,
+ S *o26*oi4
3*873 da +2*165 dt +8-109 =
2*165 da +7*462 dt + '007 =
8 '33.
9 '019
+ '9
-18
07
*oi
04
*02
+*I2
*04
+ 07
Mean value of dt +8*023, wt - 33' 8 3
3-457 da +3-368 dt s *036 = o
3*368 da +7*533 dt '145 =
+8-025 '029
+0*18 da+dt '03 = i -02
+0-69 ,, +-i3 = ol+'io
+0-80 ,, +-03 = 0; '01
+0*14
1*97
+0*27
*i8 = o| *i6
'06 = I +'06
+04 = 0' +-04
2*100 da +i -534 dt +8*125 =o
1*534 da +4*918 dt '004 =
at 2o h
-8*078,
Mean value of dt +08*002
8 *25*o 3 i
, Wt. 1170
3*n 198*872 at 20 h
STAR-TRANSITS OBSERVED BI PROF. MLEOD WITH TRANSIT B., AND RESULTING CLOCK ERRORS.
OBSERVATIONS AT WATERVILLE.
97
Name ot Star.
Dec.
Observed
Transit.
Tabular
Apparent
K.A.
Corrections.
Level.
Collima.
tion.
Assumed
Clock Slow
(Hourly Rate)
[Azimuth].
Equations of
Condition.
Normal Equations and Solution.
da.
dt.
Clock Apparently
Slow.
1892 September 14 continued.
a Delphini
a Cygni....
v Cygni
6i J Cygni
aCephei
jBCephei
+ '5 32
+44 54
+4 45
+38
- . ! +70 5!
a Aquarii ' i o 50 j
i Pegasi i E 1+2449
1892 September 15.
yuygw
69 Aquilae...
e Drlphini...
73 Draconis.
61' Cygni....
T Cygni
a Cygui
IT Ceplini
<t> Aquarii '
y Piscium
T Pegiisi
i) Pegasi
70 Pegasi
i Andromeda .
i Piscium
19 Piscium
41 H. Cephei.
40 Cassiopeiae.
Cassiopeiae.
Persei
o Piscium
50 Cassiopeia.
a Arietis
/3 Trianguli ...
67 Ceti..
36 II Cassiopeia;
v Aiieiis
8 Ceti....
Persei
47 H. Cephei....
a Ceti
3 Persei
+39 55
3 '5
+10 56
+74 35
+38 13
+37 35
+38 56
+74 48
6 38
+ 2 41
+*3 9
+22 48
+ 12 IO
+42 40
+ 5 3
+ 2 53
+67 13
+72 29
+67 30
+5 9
+ 8 37
+7' 54
+22 57
+34 29
- 6 55
+ 7 59
+72 21
+21 3
08
+48 46
+78 59
+ 3 4
+40 32
1892 September 16.
o Sagittarii..
( Aquilse
tr Sugittarii...
d Sagittaiii ..
co Aquilie
u Sagittaiii...
T Draconis ...
a 1 Cupriconii .
o 2 Capiicorni.,
<r Capricovni ..
/3 2 Caprii'orni .
f Capricorn! ..
69 Aquilte
a Cygni
( Cygui
i| Cephei
r 2 Cygni...
1 6 Pegasi ..
a Ai|iiaiii .
i Pegasi ....
fl Pegasi ....
24 Cephei..
58 Aquarii.
n Aquarii..
{ Pegasi ....
7) Peyasi....
X Pegasi....
T 2 Aquarii..
\ Aquarii..
T Cephei...
21 54
+ 13 42
21 12
19 9
+ 11 24
^16 9
+73 9
I- 12 53
4-19 27
-'5 7
18 10
- 3 -5
+44 54
+ 33 34
+61 25
+48 49
+25 25
o 50
+24 49
+ 5 40
+7' 49
ii 27
o 40
+ 10 16
+29 4
+23 o
14 10
- 8 9
+74 48
E | +62 8 j 8
foo
0-95
o'g;
0-96
o'8o
0*67
o'g6
I '00
0-97
0-95
Too
0-56
0-97
0-90
0-91
0-56
0-84
0-99
roo
roo
roo
0-96
0-99
0-99
0*67
o'57
072
0-93
I'OO
0-62
I'OO
0-98
0-97
0-93
o'6i
I'OO
0-98
0-82
0-41
0-99
0-97
0-85
I'OO
0-85
0-84
I'OO
0-89
0*60
0'97
0-92
0-88
o'S6
o'go
0-87
o'97
0-95
0-98
0-82
0-93
I'OO
0-98
I'OO
0-99
0-63
0-93
0-98
roo
0-99
I'OO
o'go
o'95
'55
h in s
2031 19-37
20 34 26-81
20 49 50-84
205845-73
21 12 42-29
21 2358-33
21 56 56-61
21 58 41'27
20 15 O'65
20 20 40-36
2O 24 43*07
202934-91
20 3843-42
8-69
972 i
ai
21
23
23 5 24*26
23 8 14-27
23 ii 57-66
23 1639-59
23 20 21-79
23 29 30-70
2331 4-10
23 37 3279
23
26 36"! i
31 2-44
33 34'03
3621-44!
5055-42,
5745'4;
5947-06
2 815-78!
2 19 4'53'
2 2427-68
2 29 2O'6o
2 30 36-29
2 33 2 9'44
248 27-28
253 '7'4
2574777
1854 50-46
1857 4-09
18 59 5 8 20
19 756-76
19 9 22*14
19 12 10*29
19 14 13-08
20 221-99
20 8 17-90
20 841-88
20 9 48*1 3
20 1 1 34-83
20 19 20-40
20 20 38*39
20 3422*59
20 38 2ii*2I
20 39 43*01
21 3925*46
21 4446-27
21 5651-99
21 58 36*36
22 I 22'77
22 4 20*93
22 22 36*14
22 26 26-60
223242*54
22 34 34*04
223757*66
22 40 30*83
2 3
39'5'
46-96
10*9 1
57'
2-30
18-41
16-86
1-42
23-02
2-66
5'42
57'45
30-93
12-63
3>'59
46*49
3 6 73
20-09
1-92
44-16
52-94
26-41
54'99
48^19
57'9 2
24'39
5 6 '45
43'93
>7'34
7*64
9'74
27-40
5'53
43-46
59-16
52-30
575
40-28
1 1 -08
14-98
28-54
22*75
21*25
46*69
3470
46*22
42'20
6*2 7
I2*3O
59'7
44-69
2-65
46-93
52-56
7'42
50*44
II'22
16-86
1-41
47 '66
4671
o'68
51-08
7-12
58-88
22-29
55-28
11-63
3''57
0-04 j
0*04 '
0*06
O'll
O'O2
0*06
0-03
0-04
0*17
0-05
-0-04
-0-04
-0-18
-0-03
-0*03
-0*05
-0-05
-0*04
-0*07
-0*03
-0*03
-O"I2
O*I2
O*1O
0*08
0*04
-0*I 5
0*05
o'o6
0-03
0*04
o-iS
o'o6
0-04
o'og
0-33
o'o5
0-09
o'oo
+o'oi
o'oo
o'oo
+O'OI
o'oo
+0-03
+0"O2
+0'OI
-j-O'Ol
+0*0 1
+O'01
+0-01
-j-0'02
+0-07
+o'o6
+O'10
+0-05
+O'10
+0-07
+O'II
+0-08
+0-36
+o'o6
+0-08
+0-08
+0-15
+0-13
+o'o6
+o'o8
+0-53
Waterville.
3 m ,98-850
at 2o h
(+08-010)
[+o 8 '2 5 oj
8
+0-16
+0'21
+0'20
+0-19
+0-32
+0-44
+0-15
+0-16
Waterville.
+0-16 3m 228-580
+O'I2
+0'I2
-j-o'45 j [ o s 'ooo]
+o-.5
-0-15
0^46
O'12
O'I2
0'I 3
0-13
0'12
o'i6
O"12
O'I2
0-31
-0-63
0-49
o'3O
0*19
o'6i
0'2I
0-23
o'lg
+0-19
+0-63
+0'20
+0-I 9
+0-29
+0'99
+0-19
+0-25
[ 08-000]
[+08-180]
[ 08-000]
Waterville.
+0'2O
+0'2O
+O'2O
+O'20
+0-19
+0'20
+0-66
0*19
0-19
0-19
0'20
O'2O
O'20
0-19
0-27
0-23
0-40
+0-29
+0'2I
+0-19
+O'2I
+o'i9
+0-6 1
0-19
0*19
O"22
O'2I
O'2O
0*19
-072
+ 3 m 248-630
at 2i>
(+0 3 '075)
[08-220]
[ o
+o'6i da+dt+'oi =o
+o'i7 ,, '07 =
+0-25 ,, +'oo = o
+0-30
0-38
0-92
+079
+0-50
s
+01
06
1-841 (la +1-847 dt +"'009 =
1-847 da +6-775 dt '086 =
+ '02 = j +'04
'12 =O ' '05
-05=0' '05 j 8 '025, +8-oi9-oi6
"04 = I "03
Mean value of dt +o s 'o22, Wt. 11*70
+0-27 da+dt "05 =o
+O'82 +'02 = O
+0-67 ,, "04 =
''45 .. '02 =
+0-31 da+dt '13 =
+0-29
i'49
+0-86
+076
+0-52
+'53
+0-&5
+O'2I
+o'73
+075
0-69
"19 =
'03 =
+-n=o
'12 =
--11=0
+'00 =
'02 =
+'o6=0
+'08 =
+'20 =
+'17 =
1-17 da+dt -06 =
071
+0-05
+o'6 9
no
+0-52
+o- 3 6
+0-86
+06 =
05 =
+14 =
'12 =
-|-'OO =
-3 =
+ 24 =
+070 da+dt+'o8 =
i'i6 ,, +'40 =
+'09 =
+09 =
+16 =
+04 =
+o-54
+o'79
+0-08
-2-39
+o'75
+0-26
24:
28:
+1*03 da+dt "07 =
+o'64 +'09 =
+1-03 ,, '09 =
+i'oo ,, '02 =
-j-o'66 +'oo =
+0-96
1-25
+ 'oo =
+o'8o da+ilt+'o3 =
+o'93
+0-93
+ I"00
+o'95
+0-99
+0-82
+0*17
+0*38
-o'35
07 =
16 =
+'04 =
12 =
"06 =
+'O2 =
+'04 =
+ *02 =
'05 =
[ o s -o 7 o]
+0-08 da+dt+'02 =
i+o'49 .. +'oi =
,+o'79 ,. +'3 = <:
+0-50 -o6 = c
+072 +'04 = c
1-09 ,, "oz = c
f-o'gi da+dt+'oi=e
[08-050]
+o'79
+0-67
+o'43
+0-52
+0-94
+o'8 7
i '49
+11 =
+'02 =
-18 =
+ 'O2 =
+'12 =
+11 =
+ '09 =
06
+-oi
'OS
'OI
+11
"12
-16
'01
+09
'12
'II
OO
'02
+07
+08
+ '20
+12
+ '04
+ '09
06
+ '06
OO
06
'7
+-4
i '865 da +1*491 d' + 8 '019 =
1*491 da +4 '098 dt + '041=0
''004,
4*207 da +4 400 dt + 8 'oio = o
4'4oo di +9*968 dt '039 =
"012,
2732 da +1 -234 dt +8-287 =
1-234 da +5-994111+ '157-
8 'io3, 8-005 'o
3 '386 da +2 '097 dt "'265 =
2-097 da +5-959 dt + '005 =
+'3
+11
-'9
'20 + 8 'IOI,
28
Mean value of dt 8-007,
"036 '050
26*02
'06
08
o "02
"oo
+'0 7
o '03
+06
"02
"I I
+07
08
'02
+'05
+04
06
+ "O2
'OO
+02
07
+03
'CO
03
+08
'OI
'20
'OI
+07
+06
4-385 da+3'8o8dt 8-023 =
3-808 da +5'303 dt + '016 =
+S-02I, 3 '0l8'020
5-109 da +5'575 ilt 8 '2i2 = o
5-575 da +8-344 dt -222 =
+3-044,
8 "oo3'oi6
2-068 da +2-078 dt +0-035 = o
2-078 da +5'202 dt +8-031 =o
8-018,
+8-001 'OI2
4-303 da +4-263 dt + 8 -i75 =
4-263 da +6-820 dt + '200 =
8-031,
S'OIO'026
Mean value of dt '-007, Wt. i$'66
3 m 228-573 at o h
at
98 TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH WATER VILLE
CANSO MONTREAL, MADE IN 1892.
From comparison of, consecutive clock-errors thus determined the rates of the clocks
in the interval have been deduced and are set down in the second column of the follow-
ing Table. The adopted clock-rates in column 3 are in general the mean of the figures
preceding and following in the second column. In column 4 the assumed clock-rates
from the preceding Table arc given for comparison, and in the case of the Sidereal
Standard the rates as found from observations with the Greenwich Transit-Circle have
been added in the last column.
Clock Rate.
Date.
Chronometer Dent at Canso.
Date.
Sidereal Standard at Greenwich.
From Transit-
Circle
Observations.
From Star
Observations.
Hourly Rate
Adopted.
Assumed in
Reduction.
From Star
Observations.
Hourly Rate
Adopted.
Assumed in
Reduction.
1892.
s
H
s
1892.
s
s
s
s
April 19
+ 9 - 896
+ 9-900
Aug. 15
- 0-035
0-030
0-038
+ 9' 8 9 6
- 0-35
20
+ 9'97
+ 9-826
)6
0-027
O'OZO
0-038
+ 9-918
o-oiS
2 1
+ 9-918
+ 9-900
18
0-015
0-O2O
+ 9'9 l8
0'012
24
+ 9-972
20
O'OOS
O'O2O
O'OII
O-OO3
25
+ 9-873
+ 9920
21
0-009
O'OOO
+ 9' 8 73
O-OI5
26
+ 9-873
+ 9-87
22
O'OIO
o-oio
0-009
0-004
23
0-005
O'OOO
0-007
Ballon 102 at Montreal.
0-006
25
0-003
O'OIO
O'OOI
May 4
0-105
O'OOO
0'OOO
0-105
26! O-OO5
O'OOO
0-007
6
O-IO2
o-ooo
o-o 10
0-099
28 0-016 o-oio
O'O2O
9
0-099
o-iio
O'O22
0-098
2 9
0-026 0-045
O-O25
10
0-103
o'o6o
0-031
0-107
30 0-031 0-035
0-036
12
0-109
0-040
O'lIO
Dent 2016 at Wattrville.
'3
0-107
O'lOO
0-104
Sept. 6
+ O'!02
+ 0-090
'4
0-108
O'lOO
+ 0'102
O'l 1 I
7
+ ' IO 3
+ o-ioo
16
o- 1 ri
O'lOO
+ 0-IO4
13
+ 0-103
+ 0060
+ o-ioi
'4
+ 0-099
+ O'OIO
+ 0-097
'5
-\- 0-098
+ 0-095
+ 0-098
16
+- O'ogS
+ 0-075
CLOCK ERRORS.
99
XVII. DISCUSSION OF CLOCK ERRORS.
The Clock Errors derived from the Tables on pages 68-72 and from the last column of pages 87-97 at the
Greenwich Sidereal Time of the Moan of the Observations, together with the Adopted Rates, have been collected
in the following Table for convenience of reference.
Sidereal Standard at Greenwich.
Dent 2016 at Waterville.
Chronometer Dent at Canso.
Ballou 102 at Montreal.
Date.
Greenwich
Sidereal
Time.
Clock
Slow.
Adopted
Hourly Rate.
Greenwich
Sidereal
Time.
Clock Slow.
Adopted
Hourly Rate.
Greenwich
Sidereal
Time.
Clock Slow.
Adopted
Hourly Rate.
Greenwich
Sidereal
Time.
Clock Slow.
Adopted
Hourly
Rate.
(Hollis)
(Turner)
(M"Leo,l)
1892.
h in
S
s
h m in s
s
h m
h in a
s
h m
in s
s
Apr. 1 9
12. 18
4"35
+ 0-013
19.40-73
-10. 9. 40-963
+ 9-896
20
...
...
...
...
1 8. 8-13
-10. 5. 59-347
+ 9-907
...
21
13- 3
40-922
+ 0'0o6
16. 44-97
-10. 2. 15-662
+ 9-918
...
...
22
12. 21
40-879
+ o - oo6
1 1. 27-8 o. 6-585
H-O'IO2
.'..
.. .
23
12. 20
41-225
+ O-QIO
12. 1-8 o. 9-090
+ o 098
...
...
*4
...
...
19. 30-45
9. 49. 56-266
+ 9-873
...
25
1*. 37
41-501
+ 0-003
17. 0-08
7. 40. 55-808
+ 9^73
...
...
...
26
12-43
41-501
+ 0-003
12, 42-0
o. 15-938
-(-0-094
16. 40-98
-7.37. 2-671
+ 9-873
...
...
27
14.48
41-660
+ o 006
.
. 1 .
...
...
...
(Turner)
(Hollis)
(M c Leorl)
May 4
...
...
17.51-9
2. 25-665
0-105
5
13-43 ; 43-221
+ 0-009
13- 8'3
0.35-542
+0-103
6
12. 15 43^55
+ 0-010
12. 57'3
o. 38-001
+ 0-105
20. 7'8
2. 30-708
o-ioz
7
13- 32'4
o. 40-599
+ 0-104
...
...
9
12.43 44-105
+ 0-008
13.53-4
0.45-521
+ 0-095
...
18. 20-7
-2.37-707
0-099
10
12.41 44" 2I 3
+ o - oo8
...
16. 39-7
-2.39-902
0-103
ii
12.59 ! 44+87
+ 0-008
I5-3I-5
o. 49-860
+ 0-091
...
...
12 12-43 44'574 +0-004
...
19. 39-6
-2.45-314
0-109
13
1
17.34-6
o. 54-600
+ 0-102
17- 5'5
-2.47-730
0-107
4 !
17. 19-5
-2.50-239
0-108
15
...
17. 127
o. 59-792
+ 0-109
...
...
16
...
...
...
19. 17-4
-2.55-803
o-u i
(M'Leod)
(Turner)
Aug. 15 22.33
22^75
-0-035
...
...
16 , 19. 41
22-231
0-027
21. I2'5
o. 46-257
+ 0-100
...
17!
...
...
1.27-4
I. 3-270
0-129
'8 23.53
21-269
o-oi 5
21. 0'7
o. 3-029
+ 0-094
...
0.38-3
i. 0-246
-0-134
>9:
22.39-8
o. 5-289
+ 0-085
...
20 21.13
20-750
0-008
.. :
0.43-2
o. 53-608
0-132
21 21. 30
2O'662
0-009
...
...
22 , 2O. 44
20-317 ! o-oio
21. 26-9
o. i ro8o
+ 0-O9I
23.50-1
o. 47-74
0-128
2 3
22.39
2O-2IO O-005
...
23.41-1
o. 44-610
0-136
24
'9-55*9
o. 15-687
+ 0-093
...
25 20. 31
19-944
0-003
22. 52'O
o. 18-030
+ 0-089
26
21. 47
19-931 | 0-005
. . *
1.14-9
o. 34-290
0-141
28
21. I I
19-441
0-016
. . .
o. 6-8
0.27-643
-0-137
29
22. 6
18-894
0-026
...
. . .
...
1-357
o. 24-300
0-136
3
20. 55
18-184
0-031
...
...
o- 537
o. 21-023
0-141
Clock Howard at Canso
(Hollis)
(M c Leod)
(Turner)
Sept. 3
...
...
23. 32-9
0.48725
+ 0-070
4
23-24
13-721
+ 0-026
...
23-53'
o. 50733
+ 0-068
5
21. 13
14-282
+ 0-021
...
...
6| 23.46
14-695
+ 0-015
21.45-7
3- 0-078
-f-O*IO2
7
22. 19
14-990
+ 0-015
20. l6'7
3 *-387
+ 0-103
23.23-0
0.55-137
+ 0-064
8
21. 50
15.396
+ 0-014
...
o. 20-
o. 56-650
+ 0-06 1
9
...
...
...
a I
23- 53'
o. 58-067
+ 0-056
10
...
...
*
22.48-
0.59-258
+ 0-054
ii
...
...
. .
22. 8-
i. "557
+ 0-055
12
21-33
16-320
+ 0-01 I
. . .
22.48-
i. 1-896
+ 0-050
13
23. 21
16-621
+ 0'O1 I
23. ig-O 3. 17-678
+ 0-103
o. 27-2
i. 3'44
+ 0-047
H
21.49
16-843
+ 0-012
21. 24-0 ; 3. 19-879
+ 0-099
23.29-2
i. 4-176
+ 0-051
i5
22. I
17-176
+ O-OO9
0.53-1 3.22-587
+ 0-098
23. 2O'2
i. 5-410
+ 0-053
16
2 J. 19
17-270
+ O-OO4
21. 4I-I 3. 24-619
+ 0-098
23. 2O-2
i. 6-696
+ 0-054
100 TELEGRAPHIC DETERMINATION OF LONGITUDE.
XVIIL EXCHANGES OF SIGNALS.
The individual signals of the exchanges between the different pairs of stations were
made as described in Section VII. and were sent at arbitrary times, separated by
intervals of three or four seconds. The programme adopted in general was as follows :
East Station sends 20 Signals.
West Station sends 10 Signals.
East Station sends 20 Signals.
West Station sends 10 Signals.
Between Greenwich and Waterville and between Caiiso and Montreal two such
exchanges were made on each evening when a determination of clock-error was made
at both stations. Between Waterville and Canso one exchange was made on each
evening, usually at a time intermediate between the two exchanges Greenwich Water-
ville and also between the two exchanges Canso Montreal, so that the difference
of clocks at the terminal stations at the time of the exchange through the cable
could be found by simple interpolation, and no knowledge of the absolute rate of
the clocks at Waterville and Canso was necessary for finding the difference of longitude
between Greenwich and Montreal. In the following tables the first three columns
require no explanation. Columns 4 and 5 give the differences of the clocks in the sense
East West as found by the mean of each set of signals, but in the case of the ex-
changes between Waterville and Canso in April, as a mean time chronometer was used
at Canso, these mean differences have been reduced by the application of a rate deduced
from comparison of the clock-differences on successive days, so that the figures in
columns 4 and 5 show difference of clocks at the mean epoch of the exchange. Column
6 is the mean of the times in column 2 weighted according to the number of signals.
Column 7 is found by forming the means of the differences similarly weighted in
columns 4 and 5, and then by taking the mean of these weighted means. The last
column is the half difference of the weighted means, corrected for clock rate if
necessary, and -shows the time of transmission of the signals in one direction.
EXCHANGES OF SIGNALS.
101
Difference of Sidereal Standard and Dent 2016 found by Signals sent from
Greenwich and Waterville.
Difference of Clocks by
Means of each Exchange.
Date.
Greenwich
Sidereal
Time.
Numbei
of
Signals.
signals sent from
Time of
Transmission.
Greenwich Difference
Greenwich.
Waterville.
Sidereal Time. of Clocks.
h in
in s
m s
h m
m s
s
April 19
10 31
'9
39 5 8 '9 2
10 41
1043
1 8
8
39 58-882
3958-952
1039-2
39 58-928
0-02J
10 46
4
3958-970
1327
it
3959''99
'3 3
13 35
20
'9
3959-254
39 59' 2 47
1331-8
39 59-230
O-02I
'3 39
10
3959-228
April 20
i 7
'5
40 1-485
i 23
'9
40 1-589
II 15-4
40 1-537
0-029
April 21
i i
H
40 4-485
i 13
i 16
16
12
4 4'534
4 4'57 2
ii 11-5
40 4-547
0-O32
i 17
12
40 4-60?
13 36
'7
40 4-720
13 39
1342
18
1 1
40 4-706
40 4-802
13 39'
40 4-765
O-O5O
'343
10
4 4'843
April 22
10 16
'5
40 6-563
10 23
10 25
21
7
40 6-590
40 6-639
10 2 1 -9
40 6-608
0-O3I
10 26
10
40 6-651
354 '9
40 6-882
13 56 16 40 6-991
1 3 58 19 40 6-881
'3 56-5
40 6-947
0-063
140 1 6
4 7'33
April 2 3
10 16 14
40 8-764
10 19
10 36
1 1
7
40 8-794
40 8-842
10 24-0
40 8-813
0-036
10 38
6
40 8-868
'349
13 5i
9
16
40 9-076
40 9-153
'3 50-3
40 9-115
0-037
April 2 5
10 48
13
40 12-952
10 50
10 51
16
7
40 12-951
40 12-998
10 50-2
40 12-984
0-O28
1054
7
40 13-046
TELEGRAPHIC DETERMINATION OF LONGITUDE.
Difference of Sidereal Standard and Dent 2016 found by Signnlx sent from
Greenwich and Waterville continued.
Difference of Clocks by
Means of each Exchange.
Greenwich
Number
signals sent from
Time of
Date.
Sidereal
Time.
of
Signals.
Greenwich
Difference
Transmission.
Greenwich.
Waterville.
Sidereal Time.
of Clocks.
h m
Ill S
m s
h m
m s
s
April 2 5
14 I
'3
40 13-240
H 3
14 4
15
5
40 13-246
40 13-317
14 3-0
40 13-278
0-030
14 6
7
40 13-297
April 26
10 36
6
40 I 5 '028
10 40
10 41
16
18
40 15-040
40 15-084
10 40-3
40 15-060
0-024
1043
7
40 I 5-086
14 12
16
4015-336
I 4 15
"7
40 15-426 14 13-7
40 l 5-380
0-045
14 16
8
4 i5'33i
Mean
0-035
May 5
1 1 1 1
16
4 3 3 '674
ii 13
ii 14
17
13
4033-678
4033755
11 13-0
4033-7I7
0-039
ii 16
12
4033761
1428
'7
4 34-035
H30
43i
15
H
40 34-048
40 34-090
1430-9
40 34-070
0*026
H34
20
40 34-106
May 6
ii 7
23
40 36-107
ii 9
ii 1 1
16
H
40 36-11 1
40 36-186
1 1 9-6
40 36-150
0-040
I I 12
21
4036-194
1449
13
4036-473
1450
1451
16
'5
4 36-493
4 36-564
14507
4036-525
0-039
1452
23
40 36-566
May 7
I I IO
12
4 38-597
II II
II I 5
3
'3
40 38-610
40 38-663
1113-4
40 38-636
0-032
1 1 16
'9
4038-673
1442
13
40 38-961
H44
'445
'7
20
40 38-987
40 39-016
1444-9
40 39'4
0-025
1448
'7
4 39'44
EXCHANGES OF SIGNALS.
103
Difference of Sidereal Stamlard and Dent 2016 found by Signals sent from
Greenwich and Watern/le continued.
Difference of Clocks by
Means of each Exchange.
Date.
Greenwich
Sidereal
Time.
Number
of
Signals.
signals s
3nt from
Time of
Transmission.
Greenwich
Difference
Greenwich.
Waterville.
Sidereal Time.
of Clocks.
h m
m s
m s
h m
m a
s
May 9
II 25
16
40 42-989
II 27
II 28
12
2O
4042-959
40 43-090
II 27-4
4043-031
0-057
II 29
9
4043-089
1444
'5
443'259
1446
1448
15
17
4043-249
4043-367
14467
4 43-3I5
0-060
1450
'9
443'384
May 10
II 25
18
40 44-886
1 1 26
n 28
'9
'9
40 44-907
4045-007
II 26-7
4 44 '9 5 3
0-054.
ii 31
18
40 45-010
'449
17
4045-178
1451
1452
18
16
40 45-180
4045-300
1449-9
4045-242
0-061
454
21
4045-310
May 1 1
1458
17
4047-212
5 4
!5 7
'9
16
4047-195
4047-311
IS 4-1
40 47-261
0-051
'5 9
12
4047-327
May 12
15 o
2O
4049-291
'5 4
'5 5
'9
17
4049-316
4049-385
15 4-1
449'343
0-038
15 8
'7
4049-382
Mean
048
August 1 6
18 16
18 20
'9
10
'
4 1 5'4 2 3
41 5-428
18 18-6
41 5-372
21 2 5
18
41 5732
21 26
21 27
18
10
41 5731
41 5-883
2 I 26-3
41 5-806
0-073
21 29
9
41 5'8 7 o
August 1 7
18 2
20
41 20-396
18 4
18 5
'9
9
41 20-381
41 20-507
18 3-8
41 20-451
0-058
18 6
10
41 20-517
August i6 d i8 h . The difference of clocks in column 7 is found by applying the mean time of transmission "'054 to
tlie figures in column 5.
104
TELEGRAPHIC DETERMINATION OF LONGITUDE.
Difference of Sidereal Standard and Dent 2016 found by Signals sent from
Greenwich and Waterville continued.
Difference of Clocks by
Means of each Exchange.
Greenwich
Number
signals sent from
rp- f
Date.
Sidereal
Time.
of
Signals.
Greenwich
Difference
1 llm 01
Transmission.
Greenwich.
Waterville.
Sidereal Time. of Clocks.
h in
m s
m s
h m
m s
s
August 1 8
21 H
18
4023-384
21 36
21 38
2 I
9
4023-369
4023-497
21 36-2
4023-441
0-060
21 39
10
4023-512
August 1 9
18 16
'9
40 25-646
18 18
18 19
20
IO
40 25-662
4025764
18 17-9
40 25-708
0-055
18 20
10
40 25768
21 46
20
40 26-005
21 48
21 49
20
9
40 26-030
40 26-121
21 47-8
40 26-068
0-054
21 JO
10
40 26-128
August 20
18 35
17
4 2 7'978
l8 3 6
J837
18
8
40 27-967
40 28-079
18 36-1
40 28-026
0-051
1838
8
40 28-077
21 5 I
16
40 28-280
21 5 2
*i 53
'9
7
40 28-307
40 28-391
21 52-2
4028-344
0-056
21 54
10
40 28-414
August 2 1
20 15
20
40 30-400
20 l6
20 17
20
10
4030-413
40 30-506
20 16-1
40 30-458
0-054
20 I 8
9
4030-523
21 36
H
4030-524
21 39
21 4 I
22
I I
4030-529
40 30-624
21 39-4
4030-579
0-052
21 42
>4
40 30-641
August 22
18 18
18 19
'5
'7
40 32-461 "
40 32-548
1 8 18-9
4032-504
0-042
18 19
10
4032-463
18 20
IO
4 32'544
21 52
21 53
16
18
4032-775
4032-875
21 53'2
40 32-828
0-053
21 54
12
40 32-776
21 55
8
4032-893
EXCHANGES OF SIGNALS.
105
Difference of Sidereal Standard and Dent 2016 found by Signals sent from
Greenwich and Waterville continued.
Difference of Clocks by
Means of each Exchange.
Date.
Greenwich
Sidereal
Time.
Number
of
Signals.
signals sent from
Time of
Transmission.
Greenwich
Difference
Greenwich. Waterville.
Sidereal Time.
of Clocks.
li in
in s
111 S
h m
m s
s
August 23
18 31
'7
4 34' 6 93
18 32
1833
20
9
4034718
40 34-821
18 32-2
4034757
0-055
J834
9
4034-793
21 51
'5
4034-983
21 5 2
21 53
16
9
4034-985
40 35-088
21 52-3
4035-038
0-053
21 54
10
4035-098
August 24
18 25
18
40 36-890
18 26
18 27
20
8
40 36-891
40 36-986
18 26-1
4 36-937
0-046
18 28
9
40 36-979
23 8
18
4037-328
23 10
23 ii
20
8
4037-336
4037-435
23 9-6
4037-383
0-052
23 1 1
8
4 37-444
August 2 5
1 8 27
20
40 39-188
1828
18 30
2O
20
4039-184
439" 2 93
1 8 29-8
4039-240
0-053
'834
2O
40 39-295
23 25
18
40 39-666
23 26
23 27
20
10
40 39-668
40 39-765
23 26-0
4039-720
0-051
23 2 7
10
4 39779
August 26
1839
17
4041-494
1 8 40
18 41
18
7
40 41-605
40 41-610
1 8 40-0
4041-552
0-054
18 41
9
40 41-506
22 5 2
20
4041-905
z- 53
2254
20
7
4041-904
40 42-01 1
22 53-4
4041-959
0-053
22 56
12
4042-017
August 28
1837
18
4046-329
18 38
1839
18
9
4046-324
4046-446
1838-4
40 46-386
0-058
1 8 40
16
4046-441
GREENWICH OBSERVATIONS, 1892.
106
TELEGRAPHIC DETERMINATION OF LONGITUDE.
Difference of Sidtreal Standard and Lent 2016 found by Signals sent from
.Greemcicli and Water cille continued.
Difference of Clocks by
Means of cacli Excliange.
Date.
Greenwich
Sidereal
Time.
Number
of
Signals.
signals sent from
Time of
Transmission.
Greenwich
Difference
Greenwich.
Waterville.
Sidereal Time.
of Clocks.
li in
m s
Ill S
h m
m *
s
August 28
22 48
20
4046756
2249
22 50
'7
8
4046750
40 46-852
2249-1
40 46-805
0-050
22 ?!
8
40 46-860
August 29
1837
22
4048-816
18 38
'7
4048-937
'839
'839
10
IO
40 48-823
4048-927
18 38-6
4 48-877
0-059
1 8 40
10
40 48-823
18 41
IO
4048-943
23 8
20
4049-326
23 9
23 10
20
9
449'33i
4049-427
23 9-2
4049-383
0-054
23 u
10
4049-458
August 30
1859
i7
40 51-589
19 o
20
40 5 1-687
19 I
I 9 2
8
1 1
40 51-606
40 51 -686
19 1-4
4051-645
0-049
'9 3
10
4051-715
19 6
1 1
4051-702
23 ij
'9
4052-131
23 16
23 17
20
IO
40 52-129
40 52-221
23 16-0
4052-177
0-046
2 3 "7
IO
4052-227
Mean
0-054
Sept. 4
1912 20
43 20-253
1 9 1 4
19 16
18
10
43 20-248
43 20-345
19 14-2
43 20-298
0-046
19 17
10
4320-343
23 33
20
43 22-520
2 3 35
23 36
>4
10
43 22-522
43 22-663
23 34' 8
4322-591
0-070
23 37
10
43 22-658
Sejt. 5
'938
18
13 H' 08 ;
'939
1940
"9
9
43 24-080
43 24-183
1939-0
4324-I33
0-047
1940
8
43 24-174
EXCHANGES OF SIGNALS.
107
Difference of Sidereal Standanl and Dent 2016 found by Signals sent from
Gfreetaeieh and Watervillc continued.
Difference of Clocks by
Means of each Exchange.
Date.
Greenwich
Sidereal
Time.
Number
of
Signals.
signals sent from
Time of
Transmission.
Greenwich
Difference
Greenwich. Waterville.
Sidereal Time. '
of Clocks.
Ii in
m s
m s
h m
in s
s
Sept. 5
2338
'5
43 24-370
23 39
9
43 24-479
2340
9
43 24-37
2339-3
43 24-424
0-054
234'
1 1
43 24-476
Sept. 6
19 10
20
4325-926
19 ii
19 12
18
10
43 25-930
43 26-022
19 10-9
4325-975
0-048
19 12
6
43 26-025
23 51
'9
43 26-321
23 52
23 53
16
10
43 26-330
43 26-459
23 52-2
43 26-390
0-067
23 55
1 1
.4326-454
Sept. 7
19 14
19
43 27-967
19 15
19 15
18
10
4327-961
43 28-056
19 14-8
43 28-010
0-045
19 16
9
43 28-052
23 35
20
4328-336
23 36
23 37
16
1 1
4328-351
43 28-443
2335-8
43 28-394
0-052
23 37
8
43 28-451
Sept. 8
19 21
'9
43 30-094
19 22
19 22
17
9
43 30-100
43 30-189
1921-8
43 30-143
0-047
1923
8
43 30-I93
234
19
43 30-469
234'
2342
19
1 1
43 30-485
43 30-571
2341-2
433-5i7
0-047
2343
9
43 3 0< 5 6 4
Sept. 9
19 22
'9
43 32-283
1923
1924
18
9
43 32-281
43 32-389
1923-0
43 32-334
0-051
1924
8
43 32-377
2337
18
43 32-663
2338
2340
17
ii
43 32-662
43 32767
2338-6
43 32718
0-055
2341
10
43 32-782
Sept. 10
1929
! 9
43 34'568
1930
13
4-3 34-'66^
T J JT *""j
1930-2
43 34-6i7
0*049
1931
9
43 34*566
'9 3 2
10
43 34-667
108
TELEGRAPHIC DETERMINATION OF LONGITUDE.
Difference of Sidereal Standard and Dent 2016 found by Signals sent from
Greenwic//, and Watewille continued.
Ditference of Clocks by
Means of each Exchange.
Greenwich
Number
signals sent from
Timp nf
Date.
Sidereal
Time.
of
Signals.
Greenwich
Difference
iiiiie ui
Transmission.
Greenwich.
Waterville. Siilereal Time.
of Clocks.
h in
in s
Ill 8
h in
m s
s
Sept. 10
2 345
16
43 34'97 2
2346
2347
'3
9
43 34-9 8 4
4335-083
2346-5
43 35' 02 9
0-052
2348
'7
43 35' 81
Sept. 1 3
20 36
18
434I-373
20 40
20 41
'5
10
434I-39 2
434'"479
2039-2
43 4''43 2
0-052
20 42
9
434' 49 2
2 3 55
18
4341-695
23 56
23 57
15
10
4341701
4341-781
23 56-2
4341-741
0-043
23 58
9
434'79i
Sept. 14
1942
'9
4343-6o5
'943
'944
'5
9
4343-59 8
4343-69I
1943-1
4343-65
0-047
'945
8
4343708
23 5o
12
4343'99 6
2 3 53
23 53
i5
1 1
43 44-000
43 44^94
23 52-6
43 44-045
0-045
2354 16
43 44-o87
Sept. 1 5
19 ;i
20
43 45"699
1952
'9 53
'9
9
4345'76
4345-828
1952-4
4345-768
0-066
'9 54
18
4345-842
37
20
43 46-098
o 38
39
18
7
4346-103
4346-196
037-9
4346-I47
0-048
39
8
43 46-194
Sept. 1 6
20 20
20
43479 02
2O 21
20 22
20
'5
4347-900
4348-003
2O 2 1-2
4347-956
0-055
20 23
9
43 48-026
2 3 5 6
20
4348-250
23 57
2358
18
10
4348-244
4348-368
23 57-1
4348-309
0-060
23 59
9
4348-370
Mean
0-052
EXCHANGES OF SIGNALS.
109
Different* of Dent 2016 and Mean Time Chronometer by Dent, found by Signals sent from
Waterville and Oanso.
Difference of Clocks by
Means of each Exchange.
Date.
Greenwich
Sidereal
Time.
Number
of
Signals.
signals sent from
Time of
Transmission.
Greenwich
Difference
Waterville.
Canso.
Sidereal Time.
of Clocks.
h in
h m s
h m s
h m
h m s
s
April 20
14 I 8*462
20-987
2O
'9
17 16 46-613
17 16 47^196
1419729
1716 46-905
0-291
April 2 1
H'3'343
10
17 2O 40-504
14784
16-363
1 1
9
40-518
17 20 41 '066
H '5-575
17 2O 40-787
0-276
17-808
ii
41-060
April 22
1416-957
18
172436-965
21715
24-1 12
'9
17
172436-449
36-962
14 22-309
172436707
0-257
26-452
16
36-451
April 2 3
14 26-087
29
17 2833-328
30'3'7
34-162
21
'7
33-367
17 28 33-861
1430769
17 28 33-608
0-265
36-508 15
33-890
April 24
16 39-680
'5
17 3249-894
42-380
44-676
26
H
49-883
'7 32 5'445
16 43'468
1732 50-171
0-283
47'"34
26
50-462
April 25
14 46-276
50-188
'5
13
1941 55-005
55-026
'449' 8 35
1941 54-728
0-287
53-040
37
1941 54-441
15 33'23i
35-513
24
22
19 42 I 1-469
19 42 12-058
1534-372
19 42 11764
0-295
April 26
16 22-691
22
1946 4-581
25-258
27-178
16
'4
1946 4-079
4-576
16 26-000
1946 4-316
0-263
28-873
12
4-019
April 27
16 33-062
28
19 50 1-086
36-1 12
39''45
22
22
19 50 0-513
1-083
1637-416
19 50 0-799
0-287
4 I- 345
28
0-512
Mean
0-278
110
TELEGRAPHIC DETERMINATION OF LONGITUDE.
Difference of Dent 2016 and Clock Howard, found by Signals sent from Watermlle and Canso.
Date.
Greenwich
Sidereal
Time.
Number
of
Signals.
Difference of Clocks by
signals st- nt from
Means of each Exchange.
Time of
Transmission.
Greenwich
Difference
Waterville. Canso.
Sidereal Time.
of Clocks.
h m
h m s
h m s
h in
h m s
s
May 6
15 I 9 -0
18
3 3457'353
zi-o
22-7
16
'9
3 3456-827
57-35I
15 21-7
33457-082
0-268
2 4'5
16
56-798
May 7
15 10-8
18
3 34 52-200
12-4
H'5
17
3345 I- 6i8
52-193
15 13-5
3 345I-9 00
0-295
1 6-2
18
51-588
May 9
15 44'9
1 1
3 I943-I38
48-2
50-4
20
15
3 '94 2 '499
43-119
1549-2
3 19 42-810
0-313
52-1
16
42-484
May 10
15 21-6
15
3 1938-173
2 3'5
25-5
19
18
3 I937-59 6
38-146
15 24-5
3 1937-873
0-284
26 9
16
37-577
May 1 1
15 40-4
13
3 i933-oi5
42-4
44'3
13
31932-482
33-010
'543'4
3 I93 2 '745
0-264
45'9
16
3 2 '474
May 12
15 33'3
1 1
3 i9 2 7'894
35'
37'i
16
18
3 19 27-280
27-874
15 36"i
3 i9 2 7'577
0-304
38-8
12
27-260
May 13
15 41-5
13
3 1922-531
43'3
45'3
H
16
3 19 21-982
22-524
I544-5
3 19 22-256
0-267
48-3
H
21-988
May 14
15 '3-4
4
3 19 16-8 1 2
'5'5
17-5
18
i7
3.916-314
16-845
15 16-4
3 19 l6 '5 6 7
0-261
19-3
16
16-293
Mean
0-282
August 1 6
23 zi-i
9
3 20 51-163
23-0
2 5'4
26
19
32050-589
51-161
2 3 2 4'3
3 2 5 '87i
0-292
27-5
2 3
50-567
EXCHANGES OF SIGNALS.
Ill
Difference of Dent 2016 and Clock Howard, found by Signals sent from Waterville and Canso continued.
Difference of Clocks by
Means of each Exchange.
Date.
Greenwich
Sidereal
Time.
Number
of
Signals.
signals sent from
Time of
Transmission.
Greenwich
Difference
Waterville.
Canso.
Sidereal Time.
of Clocks.
h m
h m s
h m s
h m
h m s
s
August 1 8
22 16-7
21
3 21 39'Il8
I 9 7
2 I '2
23
6
3 21 38-557
39-095
22 19-6
3 21 38-836
0-277
22-5
16
38-562
August 20
22 8-0
20
321 39'4'S
9-7
11 . f~.
22
3 21 38-925
22 10-3
3 21 39-169
0-250
1 U
2 5
39 T
13-2
10
38-907
August 2 1
2253-8
23
3 21 38-976
55-8
57-6
13
16
38-988
321 39-559
22 56-4
3 21 39-272
0-291
59-6
16
39-566
AugUSt 2 2
2247-4
20
3 21 39-661
49-2
23
3 21 39-126
2248-5
3 21 39-394
0-268
50-8
3
39-663
August 2 3
22 Zl'O
'7
3 21 39-829
22- 9
18
10
3 21 39-233
39-8'5
22 2 2 "9
321 39'53i
0-294
24-9
1 1
39' 2 44
.
August 24
2227-3
18
3 21 39-241
29-0
20
3 21 39' 8 38
22 28-6
321 39-543
0-295
30-2
1O
39-261
August 2 5
22 35'5
IO
3 21 397'4
3 9 -I
40-2
20
7
3 21 39-132
39717
2238-9
321 39'4 2
0-295
4^4
9
39' 10 9
August 2 6
2228-1
17
3 21 39'595
30-1
2 3
9
3 21 39' 01 3
39-600
22 30'!
3 21 39-306
0-291
32-5
10
39-020
August 2 8
22 32-1
24
3 21 39'77
33'9
35-0
20
12
3 21 38-510
39-057
22 347
321 38790
0-280
36*0
10
38-513
August 29
2249-1
'7
3 21 38-889
SI'S
20
3 21 38-256
22 5I-2
3 21 38-573
0-313
52-4
7
379
53'3
10
(38-269
TELEGRAPHIC DETERMINATION OF LONGITUDE.
Difference of Dent 2016 and Clock Howard, found by Siynals sent from Watenille and Canso continued.
Difference of Clocks by
Means of each Exchange.
Greenwich
Number
signals sent from
TV
Date.
Sidereal
Time.
of
Signals.
Waterville.
Canso.
Greenwich
Sidereal Time.
Difference
of Clocks.
lime 01
Transmission.
h m
h in s
h m s
h m
h m s
s
August 30
21 50-6
22
321 38-695
52-3
537
15
14
3 21 38-140
38-689
21 53-0
3 21 38'4'3
0-281
55'5
'3
38-122
Mean
0-286
Sept. 5
23 18-4
18
3 21 20-468
19-4
20-5
20
9
3 21 19-865
20-460
2 3 I 9 -6
3 21 20-164
0-301
21-5
10
19-860
Sept. 6
23 40-1
20
321 19-651
42-2
43'3
i?
10
3 21 19-106
19-654
2342-I
3 21 19-376
0-276
44"4
10
19 086
Sept. 7
23 17-8
20
3 21 18-788
2O'I
21'2
16
12
321 18-191
18-801
23 20'0
3 21 18-498
0-294
22"2
8
18-227
Sept. 8
Z3 15-9
20
3 21 17-856
I 9 -5
20'0
21
II
321 17-271
17-839
23187
3 21 17-558
0*292
2O'9
I I
I7-253
Sept. 9
23 26'!
9
3 21 16-730
26-9
28-2
18
10
3 21 16-148
16-725
23 27-4
3 21 16-440
0-289
29-1
9
16-157
Sept. i o
23 32-4
'9
3 21 15^508
34'4
35'9
21
12
321 14-930
'5-532
2334-5
3 21 15-224
0-293
36-8
10
14-929
Sept. 1 3
23 40-0
20
3211 1-738
417
43'i
17
II
321 1 1-169
11-745
2341-6
321 11-454
0-286
43'9
7
1 1-167
Sept. 14
2 '9
21
321 10-397
5-'
6-3
20
12
321 9-857
10-413
o 4-8
3 21 10-129
0-273
7'3
8
9-851
EXCHANGES OF SIGNALS.
113
Difference of Dent 2016 und Clo'-k Howard, found by Signals sent from Waterville and Canso continued.
Date.
Greenwich
Sidereal
Time.
Number
of
Signals.
Difference of Clocks by
signals sent from
Means of each Exchange.
Time of
Transmission.
Greenwich
Difference
Waterville.
Canfo.
Sidereal Time. ' of Clocks.
h m
li m s
b m s li in
1. in s
s
Sept. 1 5
o 25-6 23
321 9-289
27-5
29-1
19 321 8713
12
o 27-;
9'3"
321 9-004
0-292
JO'I
10 8711
Sept. 1 6
o 22-9
18 3 21 8-046
247
259
19 321 7-489
10
8-053 "*
321 7766
0-282
26-8
10 7-472
Mean
0-288
Difference of Clock Howard and Baliou 102, found l>y Signals sent from Canso and Montreal.
Date.
Greenwich
Sidereal
Time.
Difference of Clocks by
Number signals sent from
of
Signals.
Means of each Exchange.
Time of
Transmission.
Greenwich Difference
Canso.
Montreal. Sidereal Time. of Clocks.
h m
111 8
in s
h in
lit S
B
May 6
1451
'454
4 1
39
35 3i-i8o
35 31-224
14 52-4
35 31-202
O-O22
16 o
16 2
41
39
35 3'-'97
35 3f24 8
16 0-8
35 31-223
O-O26
May 7
1458
'459
21
22
35 3''3 6 2
35 3'-426
1458-6
35 3I-394
0-032
1752
18 5
21
20
35 31-381
35 3'-448
'758-3
35 3''4'5
0-034
May 8 15 3
'5 4
21
2O
50 30-484
5030-531
'5 3'5
50 30-508
O'O24
I
i
May 9
15 19
1521
40
4
50 30-898
5 3'949
15 20'O
50 30-924
0-O26
'7 5 6
17 59
4'
38
50 30-936
5030-985
'7 57-4
50 30-961
0-025
GREENWICH OBSERVATIONS, 1892.
TELEGRAPHIC DETERMINATION OF LONGITUDE.
Difference of Clock Howard and Ballon 102, found by Signals sent from Canso and Montreal continued.
Date.
Greenwich
Sidereal
Time.
Number
of
Signals.
Difference of Clocks by
signals sent from
Means of each Exchange.
Time of
Transmission.
Greenwich
Difference
Canso.
Montreal.
Sidereal Time.
of Clocks.
h in
m s
m s
li in
m s
s
May 10
15 2
15 4
40
40
5031-258
50 31-300
'5 3'5
5031-279
0'02I
'755
1758
4'
40
5031-291
53i'345
17 57-0
5031-318
0-O27
May 1 1
'5 9
1510
21
21
50 31-613
50 31-656
'5 9'5
5031-635
O'O22
'7 59
18 i
21
21
50 31-636
5031-694
18 o-o
50 31-665
0-029
May 1 2
15 8
15 10
4
4'
50 31-981
5032-045
15 9-0
50 32-013
0-032
18 8
18 9
'9
20
5032-047
5032-104
18 8-5
50 32-076
0-029
May 1 3
15 17
15 19
40
40
503-354
50 32-400
15 i 8-0
503^377
O-O23
18 8
18 10
21
20
50 32-406
5032-447
1 8 9-0
5032-427
O'O2I
May 14
1521
15 24
39
33
50 32-840
50 32-883
1522-5
50 32-862
O'O22
18 20
18 22
20
'9
5032-897
5032-936
18 20-5
5032-917
O O2O
Mean
O-O26
August 1 8
2. 45
'7
52 55-771
21 46
21 47
16
7
5 2 55704
52 55746
21 45-3
5 2 55732
0-030
>i 47
8
52 55-694
35 13
52 55-111
o 36 16
037 6
52 55-061
52 55-127
o 36-2
52 55-088
O-O27
038
8
5255-059 i
August 19
2247
'9
52 50-1 10
22 49
23 52 50-052
22 50
9 52 50-1 19
52 50-084
0-027
22 50
10 52 50-061
i
i
EXCHANGES OF SIGNALS.
115
Difference of Clod- Howard and Ballon 102,foun-l by Signals sent from Canto and Montreal continued.
Date.
Greenwich
Sidereal
Time.
Numbei
of
Signals.
Difference of Clocks by
signals sent from
Means of each Exchange.
Time of
Transmission.
Greenwich
Difference
Canso. Montreal.
Sidereal Time.
of Clocks.
h in
m s in s h in
m s
s
August 1 9
033
17
52 49'4J i
35
'4
8
5 2 49'377
52 49-441
o 34-2
5249-410
0-030
o 36
8
5 2 49'3 8
August 20
2244
20
5244-542
2245
2245
19
8
5244-485
5244-535
2244-8
5244-512
0-027
22 46
IO
52 44-480
045
15
5243-844
o 46
047
18
13
5243-819
5243-865
o 46" i
5243-837
0-017
047
5
5243-822
August 22
22 4
21
5 2 34-094
22 5
22 6
20
52 34-022
S 2 34''5
22 5'O
52 34-058
0-039
22 6
8
52 34-010
I 7
15
52 33-44
i 8
20
- 2 - - . - ~2
1 9
10
52 33'43
i 8-1
52 33-404 0-036
1 9
10
52 33-360
August 2 3
21 51
'5
52 28-917
|
21 52
21 53
22
9
52 28-851
5228-914
21 52-1
52 28-886
0-029
/
21 53
IO
52 28-870
1 2
'9
52 28-186
i 3
1 4
9
IO
52 28-123
52 28-185
I 3-0
52 28-156
0-030
' 4
10
52 28-130
August 24
i 24
15
5222-505
i 2 5
16
5222-438
1 25-3
52 22-469
C-O3I
i 26
9
5222-492
i 27
10
52 22-439
August 26
22 13
22 I 4
20
18
52 12-285
5 2 "2-335
22 14-0
52 12-307
0-O23
22 I 5
10
52 12-324
22 l6
6
52 12-277
116
TELEGRAPHIC DETERMINATION OF LONGITUDE.
Difference of Clock Hoicard and Rallou 102, found by Signals sent from Ca-inso and Montreal continued.
Difference
of Clocks by
Means of each Exchange.
Datp.
Greenwich
Sidereal
Time.
Nuinbe
of
Signals
signals sent from
Time of
Transmission.
Greenwich
Difference
Canso.
Montreal.
Sidereal Time.
of Clocks.
h -a
in s
i
in s
h m
m s
s
August 26 125
'9
52 11-633
i 26
1 5
52 11-514
I 25-8
5 2 11-565
0-055
I 26
10
52 11-601
J 27
9
52 II'jOZ
August 28
23 I
H
52 1-483
23 2
20
52 1-420
2 3 2'3
5 2 ''455
' 0-037
23 3
16
52 1-509
2 3 4
'9
52 1-412
o 58
20
52 1-085
1
2 I
52 0-998
o 59-2
52 1-039
0-036
I
9
52 ro66
I I
13 52 I-OO2
August 29 22 1 6
'9
51 56711
22 I/
20
51 56-633
22 17-0 51 56 668 0-038
22l8
10
51 56-699
22 18
10
5 1 56-620
1 40
17
51 56-012
I 41
'9
51 55-928
i 41-2
51 55-967
0-044
I 4 2
10
5 1 56 008
I 42
10
5i 55'9"
August 30
22 l6
18
51 51-548
22 17
'9
5' 5 '"479
22 17-1
51 51-510
0-034
22 18
9
5' 5f538
22 18
10
51 51-467
I 17
>5
51 50-825
I I 9
'9
5' 5'754
I l8'7
51 50792
0-035
I I 9
9
51 50-837
I 20
Q
r i ro-7 s
|
7
5 > w / j T
Mean
'33
'
'
RESULTING VALUES FOR DIFFERENCE OF LOXGITUUE.
117
XIX. RESULTING VALUES FOR DIFFERENCE OF LONGITUDE.
To compute the difference of longitude between Greenwich and Montreal, the
difference of the clocks at Greenwich and Waterville at the time of the exchange
of signals between Waterville and Canso has been computed from the actual
difference shown by the exchanges of signals given in the first of the preceding
tables. Similarly, the difference of the clocks at Canso and Montreal at the time of
exchange has been computed from the figures on pp. 113-116. These computed differ-
ences for the nights on which observations were made both at Greenwich and Montreal,
together with the differences of clocks at Waterville and Canso determined by the
signals through the cable, are collected in the Table which follows. The sum of the
figures in columns 3, 4 and 5 given in the last column is the difference of clocks
at Greenwich and Montreal.
Date.
Greenwich
Sidereal Time.
Sidereal Standard
Dent 2016.
Dent 2016
Clock Howard.
Clock Howard
Ballou 102.
Sidereal Standard
Ballou loz.
h in
Ill S
h in s
Ill S
h m s
>fay 6
I 5 . 217
4- 36-577
3. 34. 57-082
35- 3>' 2 'i
4- 51- 4- 8 70
9
15. 49-2
40. 43-404
3. 19. 42-810
50. 30-931
4- 5- 57-I45
10
15- H'5
40. 45-292
3. 19. 37-873
50. 31-284
4- 5"- 54-449
12
15. 36-1
40. 49-388
3. 19. 27-577
50. 32*022
4- 5- 48-987
August 1 8
22. 19 6 .(0. 23-520
3. 21. 38-836
52. 55-603
4- 54- 57-959
20
22. 10'3
40. 28-373
3. 21. 39-169
52. 44-417
4- 54- 5 r 959
22
22. 48-5
40. 32-910
3- 39"394
5*. 33'93
4- 54- 46-207
23
22. 22'9
40. 35'OSl 3. 21. 39-531
52. 28768
4- 54- 43-38o
26
22. 3O'F
40. 41-922
3. 21. 39-306
52. 12-245
4- 54- 33-473
28
22. 34-7
40. 46780
3. 21. 38-790
52- ''553
4- 54- 27''3
29
22. 5 1 '2
40. 49-350
3- 21- 38-573
51. 56-551
4- 54- 2 4'474
30
21. 53'0
40. 52-004
3. 21. 38-413 51. 51-369
4. 54. 21786
Similarly, to compute the difference of longitude between Greenwich and Canso, the
difference of time shown by the clocks at Greenwich and Waterville at the time of the
exchange of signals between Waterville and Canso has been computed from the
actual difference shown by the exchange of signals, and this computed difference
has been added to the difference of clocks at Waterville and Canso given by the cable
exchange.
118
TELEGRAPHIC DETERMINATION OF LONGITUDE.
Date.
Greenwich Sidereal
Time.
Sidereil Standard
Dent 2016.
Dent 2016 Dent
Chronometer.
Sidereal Standard Dent
Chronometer.
li m
ll IN
ll III S
ll 111 3
April 21 : 14. 15-575
40. 4-819
17. 20.40-787
1 8. 0.45-606
*5
H. 49' 8 35
13-348
19.41. 54728
2O. 22. 8-O/6
26
16. 26-000
,5-578
19.46. 4-316
20. 26. 19-894
Dent 2016
Sidereal Standard
Clock Howard.
Clock Howard.
Sept. 7
23. 2O'O
43-28-372
3. 2 1 . 1 8-498
4. 4. 46-870
8
23.187
3-4S5
7-558 48-043
13
23.41-6
41-718
H'454
53"'7z
4
o. 4-8
44-064
10-129
54''93
5
o. 27-5
46-134
9-004
55-I38
16 o. 24-6 4-8-356
7-766
56-122
Greenwich and Montreal.
The dates on which observations were made both at Greenwich and Montreal are
given in the first column of the following Table. Column 6 shows the difference of
clocks at these two places at the time of the cable exchange as computed above.
Columns 4 and 7 give the error of the clocks at Greenwich and Montreal respectively also
at the time of the cable exchange computed from the errors and rates on p. 99. From
the figures in columns 4, 6 and 7, the value of the difference of longitude unconnected for
personal equation of the observers is deduced and given in column 9.
Weights have been assigned to each determination of clock error, on a scale of 1 to 4,
weight 4 being given in cases where 15 or more clock-stars with polar stars were observed
in reversed positions of the transit instrument. No clock error depending on observa-
tions in one position only has been used, the weight being assigned in such cases.
In the case of Prof. M c Leod's results which were based on a somewhat different
system, the theoretical weights computed by him only take account of the accidental
errors of a transit, and they require to be modified for systematic errors due to instru-
mental corrections, variation of personal equation and other causes affecting the observa-
tions on any particular night. In view of these sources of error it has been considered
advisable to limit the weight for any night to a maximum of about 18 on Prof. M c Leod's
scale of weights, and to make these comparable with Mr Turner's and Mr Hollis's results,
a weight of 4 was assigned to this limiting weight of 18 or upwards, and weights 3, 2,
or 1 to lesser weights on Prof. M c Leod's scale in rough proportion to them.
Thus weight 4 in each case corresponds to what is considered a full night.
The weights for the difference of longitude are formed by the formula i^, where m
J m+n
is the weight of the determination of clock error at one station and n that at the other.
RESULTING VALUES FOR DIFFERENCE OF LONGITUDE.
119
Observer at
Date.
reunwiuh.
loutreal.
Greenwich JJ Difference of
Clock .S> Clocks by
Slow. ' fe Signals.
Montreal
Clock Slow.
1
Difference of
Longitude
uncorrected for
Personal Equation.
3
^3
$ 1
PH
1892,
1
s
h m s
m s
h in s
s
May 6
H.T.
M C L.
43-586
4
4.51. 4-870
- 2.30-225
4
4. 54. 18-681 8
+ 0-126
9
1 )
j ,
44-130
4
50.57-145
37-457
4 '8732 ! 8
+ 0-177
10
) )
, ,
44^35
4
54-449
39-773
4
'8-457
0-098
12
"
44-586
4
48-987
44-871
4
18-444 ! 8
O'l II
Weighted
Mean .
4.54.18-579* 32
Aug. 1 8
M"L.
H.T.
21-292
3
4- 54- 57-959
(i. o- 55 6)t
o 4.54.18-695
20
) J
20-742
4
5''959
o- 53-945
4
18-756 8
+ 0-108
22
J >
20-296
3
46-207
47-872
4
18-631 7
0-017
23
y j
2O'2I I
i
43-380
44787
i
18-804 2
+ 0-156
26
, ,
19-927
3
33+73
34-678
o
18-722 ! O
28
j )
19-419
4
27-123
27-853
4
18-689 ' 8
+ 0-041
2 9
j )
18-874,
4
24-474
24-673
3
18-675 7
+ 0-027
3
"
18-154
4
21-786
21-447
3
'8-493
7
- -'55
Weighted
Mean .
4. 54. 18-661
39
Greenwich and Canso.
The explanation of the preceding Table applies equally to this which follows, Canso
being substituted for Montreal.
Observer at
Difference of
Date.
'|
Greenwich
Clock
Slow.
-tS
a
Difference of
Clocks by
Signal.
Canso
Clock Slow.
t!
Longitude
uncorrected for
Personal
S
*o3
i
X , >-**
' ' 3
W
s
Equation.
'53
1
O
O ^
^
^
1892,
s
h m s
h in s
h m s
s
Apr. 2 1
H.
M C L.
40-929
3
18. 0.45-606
-10. 2.40-357
4
4. 4. 6-892
7
+ 0-136
25
j )
, ,
41-508
4
20. 22. 8-076
- 7.41. 17-240
4
6-824
8
+ 0-068
26
J )
i
41-512
4
2O. 26. 19-894
- 7- 37- 5"'39
4
6-545
8
0-21 I
Weighted
Mean
4- 4- 6 '748
23
Sept. 7
H.
H.T.
15-005
4
4. 4. 46 870
o. o. 55-134
4
4- 4- 6-741
8
0-063
8
)
'5'4'7
4
48-043
56-588
4
6-872
8
+ 0-068
13
, ,
16-625
4
53-172
i. 3009
4
6-788
8
0-016
'4
i
16-870
4
54"'93
4-208
4
6-855
8
+ 0-051
'5
, ,
17-198
4
5-469
3
6-867
7
+ 0-063
16
"
17-286
56-122
6-754
2
6-654
Weighted
.Mean . . .
4. 4. 6^824
39
* This result refers to the pier at Montreal used in May, which was 3 feet to the west of that used in August. The latter
has been adopted as the meridian for the longitude of Montreal, and a correction of o'-ooj has been applied to this result in
the subsequent calculations.
t Clamping bolt of stand missing. See footnote, p. 13.
TELEGRAPHIC DETERMINATION OF LONGITUDE.
Greenwich and Waterville.
For the computation of this difference of longitude the clock errors given on p. 99 were
reduced by application of the rates to show the errors of the clocks at the mean of the
times of the exchanges of signals on the nights on which there were two such exchanges,
or to the time of the exchange in cases when there was only one. This time is shown,
with the date, in the first column of the following Table. The other columns are similar
to the respective columns of the two Tables which precede.
Date and Sidereal
Time.
Gieenwich. 5
1
n
-*
Waterville. g.
Greenwich
Clock
Slow.
la 1
"5
Difference of
Clocks by
Signals.
Waterville
Clock Slow.
i
'S
Difference of
jongitude un-
corrected for
Personal
Equation.
-4-i
fc
1
Residual.
.
1
1892, tl li in
s
Ill S
s
Ill S
,s
Ajtr. 22. 12. 9-2
H.
H.T.
40-878
4
40. 6778
6-656
4
40. 4 i 'ooo
8
+ 0-166
23. 12. 7-2
J J
) )
41-223
o
8-964
9-099
4 41-088
26. 12. 27-0
> >
J )
41-500
4
15-220
15-914
4
40-806
8
0-028
Weighted
Mean .
40. 40-903
16
May 5. 12. 52-0
H.T.
H.
43' 2 '3
4
40. 33-894
35'5'4
4
4- 4 1 "593
8
0-125
6. 13. 0-2
>
r )
43-5 6 3
4
36-338
38-006
3
41-895
7
+ 0-177
9- '3- 7''
) )
) i
44-108
4
43-173
45-448
4
4'' 8 33
8
+ 0-115
11. 15. 4-1
) )
j >
44-504
4
47-261
49-818
4 ''947
Weighted
Mean .
40. 41-768
2 3
Aug. 16. 19. 52-5
M C L.
H.
22-226
2
41. 5-589 46-124
4
40. 41-691
5
- 0-075
18. 21. 36-2
) i
y
21-303
3
23-441 3-085
4
41-659
7
0-107
22. 20. 6-1
) )
> i
20-323
3
32-666 i io"957
o
42-032
o
25.20. 57-9
> )
1 i
'9'943
3
39-480 17-861
4
41-562
7
0-204
Weighted
Mean . .
40. 41-632
'9
Sept. 6. 21. 3 1 '6
H.
M C L.
14-661
4
43. 26-183
in 8
3- 0-054
2
40. 40-790
5
+ 0-004
7.21.25-3
I
14-976
4
28-202
2-505
2 4' 6 73
5
o-i 13
13. 22. 177
I
16-609
4
41-587
<7'573
4
40-623
8
0-163
14. 21. 48-0
>
16-843
4
43-848
19-919
2 i 477 2
5
0-014
15. 22. I5'2
I
17-178
4
45'958
22-329
4 40-807
8
+ 0-021
l6. 22. 9'2
)
17-277
o
48''33
24-665
4 4'745
Weighted
Mean .
40.40-730
3i
In addition to the preceding results, the following independent determinations of
difference of longitude Waterville-Montreal, Waterville-Canso, are available.
RESULTING VALUES FOR DIFFERENCE OF LONGITUDE.
121
Wateraille anil Montreal.
Observer at
Difference of
Date.
o*
'>
13
!
Waterville
Clock
Slow.
-&
Difference of
Clocks by
Signals.
Montreal
Clock Slow. -g
Longitude
uucorrected for
Personal
ja
Residual.
3
o
'
'3
Equation.
'IP
*
^ , ^
8
h m s
in 8
h m 8
s
May 13
H.
ML.
54-413
3
4.9. 54-641
- 2.47-585
4
4- I3.36-639
7
0-198
Waterville ami Canso.
Observer at
Difference of
Date.
aterville.
i
I
Waterville
Clock.
Slow.
-M
1?
'3
Difference of
Clocks by
Signals.
Canso Clock
Slow.
i
- !>
*
Longitude
uncorrected for
Personal
Equation.
4i
^
to
'3
Residual.
f
P
is
m 3
h m s
m a
h m a
8
Sept. 1 6 M C L.
H.T.
3- 24-887
4
3.21. 7766
i-. 6-754
2
3.23. 25-899
5
O-II9
If a be the difference of longitude between Greenwich and Montreal,
b ,, ,, Greenwich and Canso,
c ,, ,, ,, ,, ,, ,, Greenwich and Waterville,
h ,, Personal Equation, Clock Slow by H. T. Clock Slow by H.,
m Personal Equation, Clock Slow by H. T. -Clock Slow by M C L.,
the means of the groups in the preceding Tables can be equated as follows :
Weight. Residual.
h m s
s
a -f- m
= 4-54- 8-576
32
+ 0-024
a m
= 4. 54. 18-661
39
-t- -013
f> + m
-h
= 4- 4- 6 748
23
-008
b
- h
= 4. 4. 6-824
39
+ -O2O
c
- h
= o. 40. 40-903
16
+ "069
c
+ h
= o. 40. 41*768
23
+ "050
c m
+ /
= o. 40. 41-632
9
- -134
c + m
- h
= o. 40. 40-730
3'
'056
a c + m
-h
= 4. 13.36-636
7
-198
b e m
= 3-23.25-899
5
- -119
GREENWICH OBSERVATIONS, 1892.
TELEGRAPHIC DETERMINATION OF LONGITUDE.
The following provisional values were found from the simple means and difference
of pairs as a first approximation :
h m ft a
a = 4. 54. 18-619
b = 4- 4- 7'H
c = 40.41-258
These values being substituted in the above equations, the following equations of
conditions were formed :
m = 0-043
h = + 0-433
Weight.
da
da
db
db
dc
dc
dc
dc
da dc
1 dZ> - dc
and from these the normal equations
i. + 78 da 7 dc
ii. + 67 db 5 dc
iii. 7 da 5 db +ioidc
iv. + 18 db + 10 dc
v. 7 da 62 db + 2 dc
+ dm
= -QOO
32
dm
= + -ooi
39
+ dm
- dh
= -oi 6
23
- dh
: + -017
39
- dh
= + "078
16
+ dh
= + '77
23
dm
+ dh
= 'IO2
'9
+ dm
- dh
= - -0,2
3 1
+ dm
- dh
= - "H9
7
dm
= -126
5
- 7dh
+ 1 8 dm
- 62 dh
+ i o dm
+ 2 dh
+ 1 56 dm
- 8od/i
80 dm
+ i 5 8 dh
= 1-704
= -t-
As the coefficients of db, dm and dh in equations i. and iii. are small, these terms
may be neglected as a first approximation, and solution of these two equations gives
da = "-020 dc = -(- S 'oi7
and substituting these values in equations ii., iv. and v., we have
ii. 67 db + 1 9 dm 62 dh
iv. i8d/j +156 dm 80 cl/t
v. 62 d& 80 dm +I58d/i
= - -250
- - 1-364
= + I-47I
A rigorous solution of these gave
d& = + S> oo6 dm = "'005 dh = + "-009
The values
S 3
dc = + -017 dh = + -009
being substituted in equations i. and iii., these become
i.
iii.
78 da jdc
i da + 101 dc
= 1-641
= + i'94
and solution of these gives
da = -
019
dc =
018
RESULTING VALUES FOR DIFFERENCE OF LONGITUDE. 183
therefore finally
h in s s
a = 4. 54. 18-600 m 0-048
b = 4 . 4 - 7-*4<5 h = + . 442
c = 40. 41-276
Returning to the Tables on pages 119-121 the values of the different longitudes
uncorrected for personal equation corresponding to the determined values in column 9
can be computed from these final values and the residuals formed for each night.
These are given in the last column of the Tables.
These residuals were treated for comparison by each of the two formulae :
2 Jj^.v
A. Probable error of a result of weight I = 0-845 * -
,y n. n i
and
B- = 0-675
where v is the residual, p the weight of any determination, and n the number of
determinations used to form the mean.
The residuals of the three Tables gave, by the two formulae respectively, for the
probable error of a result of weight 1
By Formula A. By Formula B.
8 s
Greenwich to Montreal, . . . 0-234 0-211
Greenwich to Canso, . . . . 0-212 0-205
Greenwich to "Waterville, . . . 0237 0-227
Means 0-228 0-214
For a combination of two full night's, one at each station, with weight 8, the
probable errors would be :
By Formula A, o s -o8i ; by Formula B, o s 'O76.
Referring to the Normal Equations from which the final results were obtained,
it will be seen that the weights of the determinations of da and dc can, without
appreciable error, be taken as represented by their co-efficients in equations i. and iii.
respectively, viz., 78 and 101. Since the co-efficients of dfr, dm and dh are more nearly
of the same magnitude, the weights of these quantities have been determined from
the co-efficients in the equations ii., iv. and v., after the elimination of da and dc.
If A be the determinant formed by the co-efficients of d&, dm and dA, B. M. H.,
the minors of these co-efficients respectively,
Weight of dfi = = 41
B
M d = * = .13
dh .... -| = 75
(See Monthly Notices of the Royal Astronomical Society, vol. xxxiv., p. 313.)
124 TELEGRAPHIC DETERMINATION OF LONGITUDE.
and adopting the result of formula B., viz., that the probable error of a determination of
any unknown of weight unity is O s '214, the probable errors of the determined values
of the different quantities are :
8 S
p. e. of a, weight 78, 0-024 p. e. of z, weight 1 13, 0-020
b, weight 41, 0-033 , ., h > weight 75, 0-025
c, weight 101, 0-021
Applying a correction of + O s '02, which is the longitude of the pier used at
Greenwich west of the meridian of the Transit-circle, the final results become :
Longitude of Montreal transit-pier * west of the Greenwich Transit-circle,
18 s 62 -024;
longitude of Canso transit-pier west of the Greenwich Transit-circle,
4 h 4 m 7 s- 27 8 '033;
longitude of Waterville transit-pier west of the Greenwich Transit-circle,
40 m 4r-30 -021;
and the difference of personal equation between Mr Turner and Prof. McLeod,
o s- O5 S> O2O ;
the difference of personal equation between Mr Turner and Mr Hollis,
+ o s '44 "'025.
It is to be remarked that owing to the absence of results from the observer who
used Transit C., the scheme of observation was not fully carried out, and the number
of nights available for the respective determinations is consequently less than the
'number intended. The value of the results is thus seriously affected by the failure of
part of the scheme.
* This result refers to the pier at, Montreal used in August. See footnote, p. 119.
TELEGRAPHIC DETERMINATION
OF THE
DIFFERENCE OF LONGITUDE
BETWEEN
GREENWICH AND KILLORGLIN
IN THE YEAR 1898.
L INTRODUCTORY.
IT had been suggested in the Report to the Board of Visitors of June 1892 that, as
supplementary to the determinations of the longitude of Valentia, made many years
ago, and to that of Waterville (the account of which is given in a previous section
of this volume), it would be desirable in the interests of geodesy to determine the longi-
tude of a third station in this neighbourhood, which forms the western end of the great
European arc of longitude, since both Valentia and Waterville may not improbably be
affected by considerable local attraction, situated as they are between the Atlantic on
the west and a mountain mass on the east ; and Killorglin, at the head of Dingle Bay,
was indicated as the station most suitable for the purpose. The subject was again
referred to in subsequent reports, but it was not found practicable to take this work
in hand until 1898. and the determination was made in the autumn of that year.
Correspondence was opened with Colonel Duncan A. Johnston, Director General of
the Ordnance Survey Department, in July 1898, who selected the Ballymacprier station
of the Survey as a suitable site for the longitude determination. This station stands
in a pasture field, half a mile north of Killorgliu and one mile east of Sun Hill. By
GREENWICH OBSERVATIONS. r
1%Q TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH-KILLORGLIN, 1898.
Colonel Johnston's direction, Mr W. Lally, the Observer of the Ordnance Survey in
that district, made arrangements with the occupier of the field for the use of a plot of
ground on which to set up the observing hut and build the observation pier.
The Observers appointed were Mr Dyson, Chief Assistant, and Mr Hollis. Mi-
Dyson left Greenwich on October 3, arriving at Killorglin on October 4. He set up the
observing hut, and with the co-operation of Mr Kennedy of the Telegraph Department
of the G.P.O. made the necessary telegraphic connections between the post-office
at Killorglin and the observing station. Experimental signals were exchanged on
October 6, 7, 8 and 10. Observations of stars were begun on October 11 by Mr Dyson
at Killorglin and Mr Hollis at Greenwich, and made on every clear evening at each
station until October 24. On October 25, Mr Dyson left Killorglin ; on October 27
Mr Hollis left Greenwich, arriving at Killorglin on October 28, and observations
were begun again on that evening. This second series was ended on November 13,
and the observers again interchanged stations on the night of November 14.
Observations of the third series were begun, Mr Dyson being at Killorglin, Mr Hollis at
Greenwich, on November 16, and the determination was completed on November 28.
Signals were exchanged every night, whether star observations were made or not,
except on November 7, and star observations were made whenever weather permitted.
The exact dates of these will be seen from the records which follow.
II. OBSERVING STATIONS.
Greenwich. The observations at Greenwich were made in the Transit Pavilion,
which is described on pp. 115, 116 of the Paris-Greenwich longitude determination
in 1892.
Killorglin. The observations were made in an observing hut consisting of a wooden
framework covered with canvas 12 feet long by 8 feet broad, lent by Professor Turner.
The pier, which was of brick, was built on a concrete foundation, 4 feet cube,
and was surmounted by a capping stone. The height of the brickwork was 3 feet
above the concrete, and the centre of the pier was 5 feet due south of the Ordnance
Survey mark before mentioned. The observing hut was lighted at night by oil-lamps.
III. INSTRUMENTS.
The instruments used were those designated D and E of the series of five transits
described in previous sections. These two transits had been used by the English
INSTRUMENTS ; INSTRUMENTAL CONSTANTS ; WIRE INTERVALS.
observers in the Montreal longitude, 1892, and in the determination of the longitude
Paris-Greenwich, 1892, as well as in some experimental observations in the front court
at Greenwich. Mr Dyson observed throughout with Transit D, Transit E being
assigned to Mr Hollis. The stands used were those with reversing gear, supplied for
the longitude determinations in 1892, which are described on page 116 of the account
of the Paris longitude determination, 1892. Stand I. remained at Greenwich through-
out the work, and Stand II., which had been returned from Montreal, was set up at
Killorglin. The counterpoise springs were removed from the uprights of the reversing
gear. The field of view of the transits at Killorglin was lighted by oil-lamps resting
on supports attached to the transit-stands, at Greenwich by electric lamps fed by
storage batteries. In each case the lamps ;it both ends of the axis were always alight
simultaneously.
Bohnenberger eyepieces with diagonal reflectors in which the eye-tube takes a
horizontal position were used for determination of level and collimation. The level-
error was also determined by the striding-levels, used in the other longitude determin-
ations described in this volume. The level designated c was used with transit D
throughout. In the first series, i.e., from October 11 to 24, level e was used with
Transit E, but by some accident on the journey, this level was found unfit for use on
its arrival at Killorglin, and level b was therefore used with this transit during the
remainder of the operations.
IV. INSTRUMENTAL CONSTANTS.
(l) The value of one revolution of the micrometer screws. As Transits D and E
were used in the longitude determinations made in 1892 as well as in that described in
this account, the constants of the instruments were in general the same for all these
operations. On pp. 117 et seq of the account of the Paris-Greenwich longitude, 1892,
there will be found details of the observations made to determine the value of the
revolutions of micrometer screws of Transits D and E, which include observations made
for this purpose in 1898.
In the reduction of the Killorglin longitude the value of one revolution of
the screw = 56"'40 = 3 S 760 in equatorial interval was used for both instruments.
Wire Intervals.
(2) The equatorial intervals of the vertical wires of Transit E were found from
the observations of the transits of stars made during the longitude, as described in a
128 TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH-KILLORGLIN, 1898.
previous section (see Paris-Greenwich longitude, p. 191), and also by observations of
coincidence of each wire with its reflected image at the nadir made on 1898, October
19 and 22. The following table gives the details of the results of these observations,
the nine vertical wires being denoted by the Roman numerals, L, II., III., etc., in the
order in which a star transits when the instrument is in the position micrometer
head west.
Wire Intervals. Transit E.
Number Position
of of
Stars. Instrument.
II.
III.
Wires.
IV. V. VI.
VII.
VIII.
IX.
Oct. 11-24
and
Nov. 16-27
I"
West
13-938
1 1
254
8-438
5-568 ...
5-625
8-402
11-414
14-217
ii
3
East
14-019
ii
282
8-488
5-596 ...
5-576
8-337
11-356
14-132
Oct.28-Nov.
3 40
West
13*977
ii
256
8-450
5-577
5-608
8-344
11-394
14-196
n
40
East
1 3^94
1 1
297
8-475
5-565 ...
5-558
8-358
11-344
14-159
Oct. 19
Nadir
Observation.
14-004
n
274
8-464
5*567 -
5-595
8-371
n'359
14-128
Oct. 22
ii
n
'3'993
ii
265
8-479
5-581 ...
5-610
8'33 2
11-353
14-119
The simple mean of these nine determinations was taken in each case, and the
following adopted values for distances from the centre wire are obtained :
Wire ( fT). Transit E. Equatorial Interval.
i
II
III
iv
v
VI
VII.
VIII
IX.
+ I 3-988
+11-271
+ 8-466
+ 5-576
- 5-595
_ 8-358
-ii'37o
14-159
These intervals are sensibly the same as those found for this instrument in 1892.
The wire intervals of Transit D found in that year, given on p. 122, were therefore
adopted without alteration.
diT
(3) The value of l rev - of the micrometer screw of the levels and the value of 1
of the level scales. As the striding-levels 6 and c, which were used for the greater
part of the observations of the Killorglin longitude, were also used in the Paris-Green-
wich longitude determination, 1902, and the constants of these instruments were
determined very thoroughly for that work, the values then found and given on
VALUES OF LEVEL SCALES ; INEQUALITY OF PIVOTS.
129
pp. 193-196 of the account of that work were adopted. The value of the screw of
level e had been found in 1892, so that in the reduction of the observations of level
made during the longitude, the values used for 1 div - of the micrometer heads, were :
for level b, o"' 8 3 | for level c, i"-o<) \ for level e, i"'O2
For the value of divisions of scales of the levels b and c, the tables given on the
pages above quoted were used. For level e, observations of the same kind as those
above referred to were made to determine this value on 1898 October 15, and on
1899 April 20, when the temperature as shown by the length of the level bubble was
about the same as that which prevailed on the nights when this level was used during
the longitudes, and from these the following table of values was deduced and adopted
for use :
Part of Scale.
Value of i d".
Part of Scale.
Value of i<"'.
d d
37-38
1-04
d d
46-47
H
1-19
38-39
I'll
47-48
1-15
39-40
1-17
48-49
1-07
40-41
I -2O
49-50
i -oo
41-42
1-23
50-51
0-98
42-43
1-24
51-52
0-98
43-44
1-24
5 2 ~53
1-03
44-45
I '22
53-54
i -06
45-46
I '22
54-55
I-OO
Inequality of Pivots.
The mean level indications, in reversed positions, of the instruments on each night
of observation were compared, and the results are given below. In the first column is
the date ; in the second the number (m) of observations of level, by means of the
striding level, micrometer head W ; in the third the number (ri) of observations,
micrometer head E ; in the fourth the weight rrl ^ n to be assigned to the result in the
fifth column, which is one-fourth of the difference between concluded level indications
W and E respectively, and is the correction applicable, positively for the position E,
and negatively for W, to the observed level indications in these positions, due to
inequality of pivots.
ISO TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH-KILLORGLIN, 1898.
Transit D.
Inequality of Pivots.
Transit E.
Date.
m.
ft,
2 TO Jt
W E.
Date.
m.
n.
2 m n
W K.
m+n
4
m+n
4
1898.
October
n
3
3
3
+ o"43
1898.
October 1 1
I
4
2
-o : 3i
'4
2
2
2
+0-14
12
5
i
2
-0-14
19
I
I
I
+ 0-72
13
i
3
2
0-36
22
3
2
2
+ O'29
'7
3
4
3
O'OI
23
6
6
6
+ 0-31
18
4
4
4
-0-15
9
i
2
i
O'OJ
28
2
4
3
O'OI
22
2
I
i
-0-25
JO
5
4
4
+ 0-18
23
4
5
4
-0-23
31
5
5
5
0-09
H
3
3
3
-0-26
November i
5
2
3
+ 0-14
3
5
4
4
+ 0-23
4
2
2
2
+ 0-07
November 3
3
5
4
-0-18
5
5
4
4
+ 0-04
5
2
3
2
O'l 1
6
2
4
3
+ 0-29
8
5
4
4
+ 0'I2
10
4
6
5
O'OI
9
3
3
3
-0'04
12
i
2
i
+ 0'IO
10
4
4
4
O'O2
13
4
2
3
4-0-04
'3
5
4
4
o'o6
16
2
6
3
+ 0-27
17
,
i
i
+ 0-19
'7
6
4
5
+0-30
18
3
2
2
-0-28
18
6
4
5
+ 0-42
20
4
3
3
0-19
21
3
3
3
+ 0-18
22
4
5
4
-0-05
26
i
2
i
+ 0-14
*5
5
5
5
0'12
27
2
3
2
-\-o~og
7
6
3
4
0'3O
Weighted
Mean
70
+ 0-18
Weighted
Mean
62
-0'1 3
As these differences appear to be systematic for the two instruments, these mean
values have been assumed to be the result of differences in the radii of the pivots
considered truly circular. Corrections resulting from these differences have been
applied in forming the adopted collimation and level-errors given in subsequent
sections.
V. CLOCKS.
The Clock used at Greenwich was the Sidereal Standard operating on the
Chronograph through a relay, the arrangement being exactly as is described in the
previous accounts in this volume. At Killorglin the clock Graham 2 was used. This
clock was set up inside the observing hut on a wooden stand embedded in a concrete
CLOCKS ; CHRONOGRAPHS, &c. ; METHODS OF OBSERVATION. 131
foundation. This clock is furnished with contact springs operated by a wheel having
thirty-one teeth, which close the circuit at the alternate odd seconds by the clock face,
and also at the last second of each minute.
VI. CHRONOGRAPHS, &c.
The Chronographs for registering observations and signals were those used in
the other determinations of longitude, and are described in detail on pp. 127, 128 of
the account of the Paris-Greenwich longitude, 1892. The electrical apparatus
there described was also used, but in a somewhat different manner. In the course
of the experimental signalling it was found impossible to send satisfactory signals
through the whole line without a relay in the middle of the line. On the advice
of an officer of the Telegraph Department of the General Post Office, who was of
opinion that weather conditions might otherwise affect the work very considerably, it
was decided to use a repeater at Haverfordwest in Wales where the cable across the
Irish Channel is joined to the land line, and that a Morse double-current key should
be used for sending the signals from both ends. The terminals of the key usually
appropriated to "line" and "earth" were therefore joined respectively to the terminals
"k" and "r" on the signalling board (see Plate V.), and the outgoing signals were
recorded on the tape through the relay (B). With this arrangement there seemed no
object in using the relay for recording transits, and the tapper wires were at both
stations joined to the terminals "f '' and "g." Sensitive Post Office relays of the new
pattern were used, adjusted as delicately as possible, and from experiments made,
it appeared that the difference of time, whether the record was made through the
observing circuit or the signalling circuit; was negligible.
V1L METHODS OF OBSERVATION.
The general methods of observation were similar to those described in previous
accounts, but in this determination it was arranged that the reversals of the instruments
in their pivots between the observations of groups of stars " Micrometer West " and
"Micrometer East" should be made at the observations of the nadir, and not at the
observations of the Polar Stars, but occasionally a Polar Star was so observed. The
complete programme for a full night's observation was as follows :
Observation of Nadir.
I. Micrometer W. 6 Clock Stars, 1 or 2 Polar Stars, 2 or 3 level determinations
First Exchange of Signals.
Observation of Nadir.
132 TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH-KILLORGLIN, 1898.
II. Micrometer E. 12 Clock Stars, 1 or 2 Polar Stars, 2 or 3 level determinations.
Second Exchange of Signals.
Observation of Nadir.
III. Micrometer W. 6 Clock Stars, 1 or 2 Polar Stars, 2 or 3 level determinations.
Observation of Nadir.
VIII. ERROR OF COLLIMATION.
This error was determined by observations of the nadir and by occasional
observations of the Polar Stars in the two positions of the instrument. In the follow-
ing tables all the results obtained for collimation are given. In Column 1 is the date
and the adopted reading for line of collimation at which the R.A. micrometer was left
when not in use for nadir or circumpolar observations. Columns 2 and 3 give the name
of the circumpolar star (when observed in reversed positions) and the error of collimation
of the middle wire, when the R.A. micrometer is set at the reading given in Column 1
deduced from observations of that star in reversed positions of the instrument.
Column 4 is the error of collimation deduced from observations of the nadir. The
last column shows the adopted Collimation error. This is found by applying the
correction due to the inequality of pivots shown on p. 130 to ea,ch of the errors in
Columns 3 and 4, to find from each the error as it would be found from reversal
on a mark in the horizon, the mean of all being then taken.
If this adopted collimation error be denoted by c, and x denote the diurnal
aberration, 0"'19 at both Greenwich and Killorglin, then the whole collimation
error applicable to observations in the position west is c + x and in position east
c + x.
Transit D. Killorglin.
Date and
Adopted
Reading.
Star.
Polar
Observation.
Nadir
Observation.
Adopted
Collimation
Error.
Date and
Adopted
Heading.
Star.
Polar
Observation.
Nadir
Observation.
Adopted
Collimation
Error.
1898.
Oct. II
Polaris
//
+ 0-06
+ O'3A
+ o'66
1898.
(Jet 14
//
+ 0-06
"
iz r '38o
+ 0-68
+ 0-23
+ 0-17
iz r '38o
...
+ 0-56
+ 0-68
+ 0-90
+ 0-66
+ '96
+ 0-36
+ 0'55
ERROR OF COLLIMATION.
133
Transit D continued.
Date and
Adopted
Beading.
Star.
Polar
Observation.
Nadir
Observation.
Adopted
Collimation
Error.
Date and
Adopted
Reading.
Star.
Polar
Observation.
Nadir
Observation.
Adopted
Collimation
Error.
1898.
Oct. 1 6
i2 r '36o
Oct. 1 8
I2 r- 36o
Oct. 19
I2 r '36o
Oct. 22
I2 r '36o
Oct. 23
i2 r '36o
Oct. 24
I2 r 360
Oct. 28
i2 r '36o
Oct. 29
i2 r '36o
Oct. 30
i 2 r '36o
Killorg
lin continu
/'
ed.
O'l I
0-28
//
+ 0-25
- o'39
1898.
Oct. 3 1
iz r '36o
Nov. i
I2 r '36o
Nov. 3
I2 r '36o
Nov. 4
I2 r- 36o
Nov. 5
Nov. 6
I2 r- 36o
Nov. 8
i2 r '36o
Greenw
ich continu
- 0-51
ed.
- 0-34
0-62
n-AS
- 0-39
1
0'20
- 079
O'l I
+ O'l?
O'OO
-0-51
o'6i
...
- ri8
- 1-13
o-; i
- 1-24
+ 02
Polaris
-0'37
Polaris
+ 0-85
u 3<J
0'Z8
- 73
I'OZ
- 0-68
- '45
- i'H
-0-45
O'g6
+ 0-39
- 0- 5 2
+ 079
+ 0-62
+ 0-45
...
- o'37
+ 0-85
+ '54
57
- o-/3
1'02
+ '39
Polaris
O'OO
G
Polaris
- 0-88
reenwich.
+ I'+i
- '34
- 1-24
0-90
- '39
- 0-85
- 079
- Q'34
+ 1-41
0-83
0-00 - 0-59
- 0-85
0-90
- '39
- i'3
Bradley 1672 S.P.
Polaris
- 73
o-oo
- 0-23
- '39
O'l 1
- 0-51
-4- 0-17
- 0-86
- '45
I'O2
o'37 o'2i
- 74
OBSERVATIONS.
134 TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH- KILLORGLIN, 1898.
Transit D continued.
Date and
Adopted
Reading.
Star.
Polar
Observation.
Nadir
Observation.
Adopted
Collimation
Error.
Date and
Adopted
Reading.
Star.
Polar
Observation.
Nadir
Observntion.
Adopted
Collimation
Error.
1898.
Nov. 9
i2 r '36o
Nov. 10
I2 r- 36o
Nov. 1 2
I2 r '36o
Nov. 1 3
I2 r- 36o
Nov. 1 5
I2 r '36o
Nov. 1 6
I2 r '36o
Greentn
eh continm
it
)d.
0-28
O'22
- 0'39
I'22
1898.
Nov. 17
I2 r '36o
Nov. 1 8
I2 r> 36o
Nov. 2 1
I2 r '36o
Nov.4
I2 r- 36o
Nov. 2 5
I2 r- 36o
Nov. 2 6
I2 r '36o
Nov. 2 7
ii r '36o
Nov.28
Killorg
Bradley 2993
lin continn
- i-35
o-ii
ed.
- 1-07
0-90
- 1-07
- 1-07
I'22
Polaris
+ 0-25
Bradlev 200 *
O'26
-0-39
0-56
O'll
- 0- 5 I
73
1 Uj
1-02
O'l I
0-96
O'62
0^96
Polaris
+ '*5
1 35
39
0-28
O'l I
- o 57
97
0^85
- i'35
- 1-41
Polaris . . .
O'OO
0'20
O'56
- '39
- 073
-0-51
o 28
I'20
/
-I- 5 8
O'OO
- '49
Bradlev 114.7...
roz
- 1-0"
- 1-07
'illorglin.
- 1-52
Polaris
I'O2
- I-0 7
-1-58
- "75
- i'35
- i'35
- i-75
Polaris
M Jl-
39
0-90
- i'5 8 - ''55
/ i
- '35
- 0'34
0-67
ERROR OF COLLIMATION.
135
Transit K.
Date and
Adopted
Heading.
Star.
Polar
Observation.
Nadir
Observation.
Adopted
Collimation
Error.
Date and
Adopted
Reading.
Star.
Polar
Observation.
Nadir
Observation.
Adopted
Collimation
Error.
1898.
Oct. II
io r '56o
Oct. 12
io r '56o
Oct. 13
io r '56o
Oct. 1 6
io r '56o
Oct. 17
io r '56o
Oct. 1 8
io r- 56o
Oct. 19
io r '56o
Out. 21
io r '56o
Oct. 22
I0 r -56o
c
Polaris
Greenwich.
o - o6
n
- 0-17
- OM7
O'OO
- 0-I 5
1898.
Oct. 23
io r- 56o
Oct. 24
io r '56o
Oct. 28
io r -85o
Oct. 29
io"-85o
Oct. 30
io r -85o
Oct. 31
io r -85o
Nov. 3
io r -85o
Greenio
ieh continu
//
ed.
/
- 0-23
O'l I
+ 0-23
-o-I 5
0-40
-2-58
Polaris
Polaris
-0-45
o - o6
O'l I
o'O4
0-06
+ 0-06
- 1-18
- 0-28
- 0-17
- 0-17
o-i i
E
0-06
- '47
-0-45
- 0-15
0-06
o - o6
O'l I
lillorglin.
+ O'l I
+ 1-24
+ 1-07
+ 0-85
...
.
0-08
+ '34
+ 0-82
o'o6
+ o-ii
- 0-23
- 0-51
- 079
+ 0-06
- 73
Polaris
+ 0-96
1
o - o6
0-17
- '49
Polaris
- - 45
- 0-17
+ 0-23
- 0-28
- 2-82
O'4.C
+ 0-96
-0-14
+ '34
O'23
+ '45
- o'39
0-85
- '45
+ '34
+ O'l I
- 2-82
- 0-54
- 0-17
- ''35
- 2-03
2-09
+ 0-06
+ O'22
+ 0-14
- 1-82
136 TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH-KILLORGLIN, 1898.
Transit E. continued.
Date and
Adopted
Reading.
Star.
Polar
Observation.
Nadir
Observation.
Adopted
Collimatlon
Error.
Date and
Adopted
Reading.
Star.
Polar
Observation.
Nadir
Observation.
Adopted
Collimation
Error.
1898
Nov. 4
10^850
Nov. 5
10^850
Nov. 6
Nov. 8
Nov. 9
Nov. i o
Nov. 1 1
Nov. 1 3
Nov. 1 6
Killorgl
in continue
d.
- 1-92
- 2'43
-2-58
+ 0-20
1898.
Nov. 1 7
Nov. 1 8
Nov. 19
Nov. 20
NOV. 2 2
Nov. 2 4
Nov. 2 5
Nov. 2 7
G-reenwi
zh continued.
" |
-\- O'2O
-2-, 4
+ '34
- 2-18
0-03
I -80
- 2-26
2 '09
+ '8s
+ 0-56
.r olaris
- 2-14
+ 0-71
- 2-05
+ 0-85
2'2O
Bradley 1672 S.P.
- 1-97
2-48
+ I -02
+ 0-96
Bradlev 3 14.7
- 479
- 1-97
+ '99
- 2- 5
+ 0-62
+ 0-56
+0-17
+ 0-28
- 3^7
...
-3-13
4 79
+ 0-41
- 1-64
I'l 2
- i '30
+ 0-85
+ 0-23
...
Polaris . .
0-23
+ '54
- ''37
+ 0-39
+ 0-28
+ 0-51
+ 0-51
- ro 7
- 1-52
- 0-68
-73
- 1-07
c
Greenwich.
- 0-23
+ 0-42
+ 1-13
+ 0-62
I'OO
O'o6
+ 1-03
ERROR OF LEVEL.
137
IX. LEVEL ERROR.
The Level Error was determined several times during each set of observations by
the striding level, and at the beginning, in the middle and at the end of each evening's
work by the nadir observation. The difference between the level error as found
from nadir observations and with the striding level is shown in the following table.
Columns 2 and 4 are found by taking the mean ( ) of the level errors deter-
mined by the striding level in positions West and East, and subtracting this mean
from the mean (N) of the errors determined by nadir observation on the same
evening.
Transit D.
Transit E.
Date.
W + E.
Date.
W + E.
2
z
Killorgliit.
Greenwich.
1898.
October 1 1
+ 0-66
1898.
October 11 0-26
'4
+ 0-66
12 + 0-24
'9
O'I2
13 0'07
22
+ '59
17
o 40
23
-f- 0-28
18
+ 0-13
19
0-65
22
+ 0-50
23
- 0-15
Greenwich.
2 4
+ 0-03
28
+ 0-61
3
+ 0-48
3'
November i
O'lO
+ 0-35
Kiltorglin.
3
4
- 0-42
+ 0-51
0-88
November 3
5
8
+ 0-40
+ 0-28
1
0-18
9
0-19
10
12
+ 0-62
0-67
10
13
+ 1-05
+ 0-23
0-07
'3
- 0-17
Killonjlin.
Greenwich.
16
- 0-13
'7
0'02
17
- 1-26
18
+ 1-64
18
- 0-80
20
+ I -01
21
1-22
22
+ 0'12
26
1-58
2 5
+ I "2 I
27
+ 0-14
27
+ 076
138 TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH-KILLORGLIN, 1898.
The following tables give the individual determinations made with Transits D and
E respectively. The level indication given in the last column has been corrected for
the inequality of pivots, mentioned on p. 130, and has been formed as follows.
In the case of Transit D, to each level error found by the striding level in position West
//- 36 has been applied, in position East + 0"'36. For Transit E the corrections
applied were + 0"'26 and 0" - 26 respectively. The mean of all the errors found by the
striding level on each night thus corrected has been taken, and also the mean of the error
found by observation of the nadir. The mean of these two means is the level indica-
tion given in the last column. To this quantity, which gives the inclination of the
transit-stand, in the case of Transit D + 0"'18 has been applied to form the level error
used in the reduction of the observations made in position West, and 0"'18 for
the observations made in position East. In the case of Transit E, 0"'13 and +0 //- 13
have been applied in positions West and East respectively.
Transit D.
1
Date.
Sidereal
Time.
Striding Level.
Nadir.
Level
Indica-
tion.
Sidereal
Date ' Time.
Striding Level.
Nadir.
Level
Indica-
tion.
W.
E.
\V.
E.
Killorglin.
Killorglin continued.
1898.
h m
'
//
"
"
1898. h m
"
Ir
"
Oct. 1 1
2O O
- 5'33
Oct. 1 6 21 o 373
- 3'86
2O 50
- 6-47
21 30
- 2- 99
21 O
- 4-34
21 50
- *'93
21 40
- 4'QS
21 55
- 5 - 7
- 49
23 10
- 3'9 8
Oct. l8 20 30
- 3'2i
23 40
- 3'33
| 20 50
- 3'9
1 O
- 5'5
22 IO
- 2'5i
- 2 '99
1 15
6-30
I O
- 2-8*
I 30
- 5' 2 7
' 15
- 2-82
2 O
- 2-17
Oct. 14
20 15
- 4'9'
2O 40
- 5'S 1
Oct. 19 21 30
2-96
21
- 6-52
21 55
4-02
21 15
- 5'39
- 54'
o 45
- 2-82
2-65
21 30
6-03
I C
- '-'5
23 o
- 4-86
I 40
- z'34
23 10
- 4'94
Oct. 22 21 14
- 4'57
Oct. 1 6
2O 2O
4-60
21 30
3'6o
20 55
- 4-02
- 3-86
21 50
- 375
ERROR OF LEVEL.
139
Transit 1) continued.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Level
Indica-
tion.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Level
Indica-
tion.
W.
E.
W.
E.
Killorglin continued .
Greenwich continued.
1898.
h m
"
1898.
h m
"
M
Oct. 22
23 10
- 4'59
- 4-07
Oct. 30
o 30
+ 2'99
+ 2-67
IO
- 5-38
o 35
+ 4-56
I IO
- 3-32
i 30
+ 3-24
Oct. 23
21 30
- 3-36
Oct. 3 1
20 45
+ 375
21 4;
- 4'33
20 55
+ 2-68
21 55
- 4'29
21 15
+ 5'o8
22 5
- 4' 6 9
21 35
+ 4-6
22 30
- 3-82
22
+ 374
22 50
- 2-34
22 I 5
-f 4-00*
23 o
- 3'3
- 2 '99
22 50
+ 4-69
+ 4-27
23 35
- 3-03
23 40
+ 4-52
23 50
1-48
23 5
+ 3-98
23 55
- 179
O 10
+ 379
o 25
- 3-19
20
+ 477
o 35
- 2-54
o 35
+ 473
o 45
- 2-92
55
+ 4-82
i '5
- 2-51
I 10
+ 5'H
i 30
+ 4'4
Greenwich.
Nov. i
21 O
+ 4'
Oct. 28
21 40
+ I '02
21 15 + 4-84
21 50
-f 0-70
21 30 + 3-87
I 30
+ 1-65
21 40
+ 5''6
1 5
+ '49
21 55
+ 4'37
2 I 5
+ 1-25
+ 1-92
22 I 5
+ 3'86
+ 4'33
2 25
+ 2-27
22 3O
+ 3'94
2 5
+ 2-6 5
22 50
+ 4'54
3 2?
+ 2-67
23 5 + 4 -I
3 45
+ 3' 02
23 5 + 4'39
o o
+ 5'o8
Oct. 30
21 15
+ 2-36
21 2O
+ 2-28
Nov. 3
21
+ 2-62
21 30
+ 276
21 35 + 3-60
21 40
+ 2-57
21 45 + 3'55
21 55
+ i'9i
21 55
+ 276*
22 5
+ 2-23
22 5 + 3'54
22 2 5
+ ''93
22 30
+ 2-82
22 35
+ 3-36
+ 2-67
22 50
+ 271
22 50
+ 2-99
23 o
+ 2-55
23 o
+ 2-31
23 30
+ 2-68
+ 2'8l
+ 1-31
23 50
+ 2-12
The Nadir observations marked with an asterisk were observed in one position of the instrument only, and to these a weight
of J has been assigned in taking the mean.
HO TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH-KILLORGLIN, 1898.
Transit D continued.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Level
Indica-
tion.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Level
Indica-
tion.
W.
E.
W.
E.
Greenwich continued.
Greenwich continued.
1898.
b m
tl
// n
"
1898. h m
"
"
Nov. 3
o 15
+ 1-90
+ *-8i
Nov. 10 22 o 4- 3 '59
o 25
+ 3-09
22 25
+ 4-09
o 40
+ 2-71
22 55
+ 3-05
I
+ 3'33
23 10
4- 3'
1 30
+ 3-27
23 25
4- 3'59
I 50
+ 2-62
23 4
+ 3-30
23 5
+ 3-26
O IO
+ 1-65
Nov. 4
21 2 5
+ 2-II
o 40
4 2-99
21 45
4- 3'44
o 50
+ 2-34
21 55
+ 1-68
+ 2-63
I IO
4- 372
22 30
4- 3'34
I 25
+ 4-00
22 50
+ 2 '34
23 15
4- 2-38
Nov. 12
22 45
+ 3-62
23 o
+ 4-21
Nov. 5
21 30
4- 1-52
23 30
4- 3 '44
4- 3'83
21 55
+ 4'9
1 10
4- 4'3'
22 20
4- *'54
I 30
4- 3-55
22 30
+ 2-93
22 50
+ 3'43
23 5
4- 3'34
Nov. 13
22
4- 3'55
23 30
4- 3'37
+ 2-85
22 15
-j~ J-'OO
O O
4- 2-37
22 25
+ 4*80
o 25
r 2-57
22 50
+ 3-69
o 35
4 4'5
23 o
+ 4-18
I IO
4- 3'77
23 15
4- 4'95
+ 4'47
i 35
4- 302
23 35
4- 3'84
i 45
+ 2-62
5
+ 47
o 35
4- 473
I
4- 5-5
,
Nov. 6
21 2O
4- 2-54
I 30
4- 5'33
21 30
+ 3'8o
22
+ i -60
22 15
+ 1-63
22 2 5
+ 3-35
4 3' 01
KUlonjlin.
22 45
4- 3'02
23 5
+ 4-12
Nov. 1 6 21 40
4 8-57
23 15
+ 3-40
22 10 + 9'3I
I
I IO
+ 3-21
22 30
+ 10-25
23 o
|+ 8-83
23 15
4 8-78
23 35
+ 9-38
+ 9-10
Nov. 10
21 30
+ 3-36
o 30
+ 8-83
21 45
+ 1-91
I
+ 9-87
ERROR OF LEVEL.
Transit D. continued.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Level
Indica-
tion.
Date.
Sidereal
Time.
Striding Level.
Nadir.
LeTel
Indica-
tion.
W.
E.
W. E.
Killorfjlin continued.
Killorylin con ti n u ed .
1898.
h in
"
1898. >' '"
"
"
'
"
Nov. 16
' 5
+ 7-68
Nov. 1 8 o 35
+ 10-43
+ 10-27
1 20
+ 774
+ 9'io
I
+ 9'33
I 5
+ 9'70
1 '5
+ 9'8l
i 35
+ 10-43
+ 7-93
NOV. 21 22 30
+ 12-13
Nov. 17
21 50
22 50
+ 14-64
22 10 + 8-90
23 o
+ 14-65
22 30
+ 9'4 8
23 30
+ I4-63
22 50
+ 97
23 40
+ 13-62
+ 13-68
23 o
+ 9-36
23 5
+ 14-06
2 3 20
+ 10-95
o 20
+ 14-17
23 4
+ 11-16
35
+ 13-55
23 55
+ 12-03
+ 9'95
o 40
+ '3'45
o 15
+ 12-13
o 40
+ 9-87
1
I
+ 9-92
I 10
+ 10-63
Nov. 26
22 30
+ 14-83
I 30
+ 11-61
22 45
+ 17-81
I 50
+ lO'IO
23 '5
+ 16-08
+ 16-46
23 55
+ J7-5'
o 15
+ 16-50
Nov. 18
21 50
+ 8-80
22 5
+ 10-96
Nov. 27
o 35
+ 15-28
22 30
+ 9'43
o 50
+ 16-60
22 55
+ 10-14
I 20
+ '5-45
23 5
+ 9'8i
I 40
+ 15-96
23 25
+ ' '44
I 50
+ 15-59
+ 16-29
23 40
23 55
+ 1 -24
+ 1 -10
+ 10-27
2 15
2 40
+ 17-24
+ 16-98
5
+ ' '93
3 5
+ 16-52
o 20
+ i -40
3 3
+ 17-60
Transit E.
Greenwich.
Greenwich continued.
Oct. 1 1
21
|+ 2-03
Oct. 1 1
23 21 + 1-53 i
2 1 30
+ 2-5,
i 30
+ 2-67
22 1 5
+ 2-91
' 55
+ 2-90
22 45
+ 1-89
+ 2-22
2 '5
+ 2-34
GREENWICH OBSERVATIONS.
TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH-KILLORGLIN, 1898.
Transit E. continued.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Level
Indica-
tion.
. Sidereal
Time.
Striding Level.
Nadir.
Level
Indica-
tion.
W.
E.
W.
Ji..
Greenwich continued.
Greenwich continued.
1898.
h m
" 1
"
"
1898. h m
ii
II II
H
Oct. 1 2
21 30
+ 172
Oct. 19 23 o
+ 2-54
21 40
4- 1-12
1 O
4- 3-54
22
4- 1-82
i 25
4 3' 2 9
+ 3^6
23 15
+ 1-22
I 50
+ 4'2I
23 30
23 5
~\~ O' 5 2
+ 1-07
+ 172
2 10
+ 3'33
o 30
+ 1-88
I 20
+ 276*
I 50
+ 2"OO
Oct. 22 23
4- 1-27
2 O
+ 2-28
2 20
4- 0-67
2 40
+ 0-83
2 55
+ 1-64*
4- i '4 2
Oct. 13
20 55
+ 2-48
3 20
+ I '9 2
21 1 5
+ 4'5^
3 5
+ 174
21 30
+ 274
4 3
+ 1*83
22 5
+ 2-47
+ 274
22 50
4- 2-56
I O
+ 1-82
2 5
+ 3-5
Oct. 23 ! 2O 40
4- r86
22 50
+ 2-83
23 5
+ 3-45
Oct. 17
21
+ 2-26
23 4
+ 3-60
21 10
4- z '54
23 45
+ 2 '99
21 40
-t- 3-39
23 50
4- 2'go
21 55
+ 272
.
4- 179
+ 3'2
22 10
4~ 363
+ Q
O 20
4- 3'2Q
22 30
4- 2-48
2 4 52
o 35
4- 2-57
22 50
+ 2-43
o 50
+ 3'33*
23 20
+ 3"9
I 10
+ 4' '5
O 2O
+ 3'5'
1 20
+ 3'57
o 30
+ 3'I3
1 3
+ 3-58
Oct. 1 8
20 55
+ V2 3
21 15
+ 3-27
21 ^O
+ 3'9
Oct. 24
22 10
+ 2-57
21 40
+ 2-04
22 2 5
+ 2-80
22
+ 3'55
23 50
+ 3-45
22 12
+ 3'36
23 55
+ 271
22 30
23 30
+ 4'54
+ 270
+ 3'44
o 35
o 40
4- 2-24
4- 2-21
+ 278
35
+ 4'6
I IO
4- 2-28
o 45
+ 3 38
I 20
+ 2-82*
1 IO
+ 3-n
I 40
+ 3-60
i 30
4- 3-84
2 10
4- 3-10
* The Nadir observations marked with an asterisk were made in one position of the instrument only, and to the>e a weight
of has been assigned in forming the mean.
ERROR OF LEVEL.
Transit E continued.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Level
Indica-
tion.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Level
Indica-
tion.
W.
V
W.
E.
Killorylin.
Killorglin continued.
1898.
li in "
"
-
"
1898.
h in i
"
"
Oct. 28
21 50
-\- '53
Nov. 5
2 1 30 1
-f 2-89
22 30
+ 0-25*
22 40 + 3-24
23 o
-t- 0-42
23 o -f 273
2 3 5
0-27*
- 0-08
23 20
+ 4' 20
+ 1"i
35
- 1-25
23 5
+ 3'4'
J JT
' '5
- 0-89*
o 15
+ 4-00
i 50
+ 0-19
o 40
+ 2-90
i 45
+ 3-34
Nov. 8
21 40
+ 3-64
Out. 29 2 2 O
O'OI
22 8
+ 4'24
2 3 4
+ 0-24
22 Ij
+ 276
o 20
-0-17*
22 3C
4- 3*63
o 40
- 0-65*
+ 0-03
-' J
22 50
+ 3-81
1 O
o'i6
23 o +4-11
2
+ o'48
23 20 + 3-58
+ 4' 02
23 5 + 472
o 10 + 5'07
o 28 + 3-97
o 45
+ 3'9 2
i 20
+ 4' 6 4
Oct. 3 1
21 40
+ 1-85
i 50
+ 4'3'
22 lj
+' 172*
12 50
+ 2-09
23 20
23 50
-f 2-01*
+ 2'06*
+ 2-05
Nov. 9
21 55
22 10
+ 5-33
+ 5'95
o 25
+ I "92
22 30
+ 472
1 '5
+ 2 '2 2*
23 o
+ 475
4- 5-53
' 3
+ 2'4 2
23 45
+ 5 '4^
o 30
-f- 5'"
o 50
+ 4' 6 9
I
+ 6-17
Nov. 3
21 40
+ I "9 2
22 I 5
+ 4' 02
Nov. 10
22 IO
+ 6-51
22 35
+ 2-23
22 30
+ 5-5i
22 45
+ 1-67
22 55
+ 6-01
23 o
+ 0-86
23 5
+ 6-44
23 20
+ 2-15
+ 2 - o6
23 4 1
+ 6-40
23 3
o o
+ 0-85
+ 2-52
I
I 30
+ 6-01
+ 6-47
+ 6-14
o 40
+ r88
I 40
+ 6 - oo
1 30
+ '75
2
+ 5 '44
I 40
+ 2'35
2 30
+ 57i
* The Nailir observations marked with an asterisk were made in one position of the instrument only, and to these a weight
of J has been assigned in forming the mean.
On Oct. 28, 29 and 31. The striding-level was not available for use with Transit E (see p. 127).
144 TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH-KILLORGLIN, 1898.
Transit E. continued.
Date.
Sidereal
Time.
Striding Level.
Nadir.
Level
Indica-
tion.
Date.
Sidereal
Time.
Striding Level.
Level
Nadir. Indica-
tion.
W
E
W
E
Killorglin continued.
Greeninc/t continued.
1898.
h m
"
"
"
"
1898.
h m
" :
"
'
Nov. 10
3 1
+ 6-29
+ 6-14
NOV. 22
21
+ 578
3 15
-t- 6-42
2 I 30
+ 5'57
22 5
+ 6-40
Nov. 1 3
21 55
22 15
+ 8-30
+ 874
22 25
23 5
+ 6-23
+ 7'9
22 35
22 50
23 o
+ 8-24
+ 7^9
O O
O 20
35
Q
+ 7'3
+ 6-55
+ 6-62
+ 6-66
23 25
23 54
o 15
o 40
+ 7-0
+ 7 - 86
+ 7'93
+ 7-86
10
25
35
+ 7-05
+ 6'2 9
+ 7''
o 50
+ 7'35
40
+ 7'o8
I 20
+ 7 "4
I 40
+ 7'5'
(
I CO
__[_ -,._,.,
3
S
Nov. 25
21 15
+ 609
21 55
~\~ 47 '
Greenwich.
22 10
+ 5'34
22 20
4- 5'4 2
Nov. 17
23 2O
+ 3' 2 7
23 37
+ 6-43
23 40
+ 3' 10
S
23 5
+ 4'37
35
1
+ 3-87
+ 3-67
5
12
+ 4 -6 4
+ 4'54
+ 5-64
o 40
+ 5''7
1 '5
+ 5'3
Nov. 18
22 15
+ 4^5
1 20
-h 6-26
22 35
+ z'57
I 25
+ 5'49
22 50
+ 2-87
2 5
+ 5'43
o 40
+ 3'8
+ 4' 16
2 2O
+ 6-20
I 50
+ 3 '9
3 30
+ 4'3
4 5
+ 5'3
Nov. 27
23 35
+ 4'66
23 5
+ 5'33
Nov. 20
22
+ 4'57
o 35
+ 478
23 5
+ 3'54
o 50
+ 6-65
+ 4'5'
I
+ 6-51
1C
o 27
+ 3-52
+ 4' 02
+ 4 ' 1 1
I 25
45
+ 6-90
+ 6-58
+ 6-24
o 30
+ 2-93
4 *3
3
+ 6-21
o 38
+ 4-68*
3 3
+ 6-80
55
+ 276
3 52
~t~ ^ "O2
1 20
+ 3'83
4 5
+ 577
I 3
+ 4 '60
4 '5
+ 6-49
* The Nadir observations marked with an asterisk were made in one position of the instrument only, and to these a weight
of J has been assigned in forming the mean.
ERROR IN AZIMUTH.
145
X. ERROR IN AZIMUTH.
The deviation of the instrument in azimuth was determined by observation of one
or more of the following Polar Stars. The first column contains the name of the star
taken from the Greenwich Catalogues. The second gives the Ephemeris, either the
Nautical Almanac (N.A.), or the Connaissance des Temps (C.T.), or M. Lcewy's
Ephemeris (L.), in which the star appears. In the next two columns are given the
approximate N.P.D. and the mean R.A. for 1898'0 as given in the Ephemeris. The
fifth column contains corrections to this mean R.A., deduced from the Greenwich Ten
Year (1890) Catalogue. In the cases of 75 Draconis and of Bradley 2997, which are
not given in the ephemeris, the mean place given in Columns 3 and 4 has been deduced
from the Greenwich Ten Year (1890) Catalogue, and the apparent R.A. for the day
has been computed from this.
Star's Name.
Ephemeris.
Approximate
N.P.D.
Mean R.A.
iSgS'o given in
Ephemeris.
Adopted
correction to
Mean R. A.
Authority.
2. Ursae Minoris
L.
o /
4. 17
h m s
O C4 47"! I
s
0-^6
Ten Year (1890) Catalogue.
Polaris
N.A.
I 14.
I 21 4VI I
+ O'3O
Ten Year (1890) Catalogue.
Groombridi'e 750
C.T.
J. 43
A. A. T, I '77
O'26
Ten Year (1890) Catalogue.
Bradlov 1672..
N.A.
I
12 Id.. 22 '92
-4- o-l 3
Ten Year (1890) Catalogue.
Groombridge 2283
Bradley 2701
N.A.
L.
2. 22
8 cc
15. 10. 2-07
20 33 i6'O2
O'OI
4- O'37
Ten Year (1890) Catalogue.
Ten Year (1890) Catalogue.
7 5 Draconis
8. 57
2O. 34. ^S'Cq
Ten Year (1890) Catalogue.
Groombridge 3^48
Bradley 2993
C.T.
L.
3-23
i 24.
21. 19.58-54
22. 21. 26'19
0-46
+ 0-26
Ten Year (1890) Catalogue.
Ten Year (1890) CataloTie.
Bradley 2997
J. 17
22 21 50-36
Ten Year (1890) Catalo r ue.
Bradley ? 1 47 . . .
N.A.
3 I ?
2 3. 27. 48-6?
4- O'24
Ten Year (1890) Catalogue.
The corrections to observed transits for instrumental errors have been computed
by the formula c sec. S + n tan. S + m, where S is the declination of the star, c the
collimation error including diurnal aberration, n the deviation of the line of collimation
at the pole, and m the deviation at the equator.
For the determination of the quantity n, transits of a polar star and a clock star
are combined, and the value of n deduced by use of the appropriate factors, as exhibited
in the tables, pp. 146 et seq. In these tables the second column gives the names of the
polar star and clock star observed, generally in the same position of the instrument
as the polar star and not long before or after. Column 3 gives the position of the
instrument in which they were observed. Column 4 shows the seconds of difference
between the Tabular R.A. for the day, and the observed time of transit corrected for
collimation by application of the quantity c sec. S, and for the clock rate in the interval
TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH-KILLORGLIN, 1898.
between the observations of the two stars, which has been applied to the time of
observation of the clock star. The next column shows the tangent of the declination
of each star. Subtracting the lower of each pair of lines from the upper in Columns
4 and 5, the quotient of the difference in Column 4 by that in Column 5 gives the
value of n found in Column 6.
The adopted value of n given in the last column has been found by taking the
simple mean of the values for the two positions East and West respectively.
Transit D Values of n.
Datt-.
Names of Stars.
Position.
Tabular
R.A.-
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
Date. Names of Stars.
Tabular
.3 R.A.- '
5 Observed
fg Transit.
F ' u:tors - Apparent.
n
Adopted.
1898.
Oct. 1 1
Oct. 14
Oct. 1 8
Oct. 22
7 5 Draconis
Kit
E
E
W
W
W
W
E
E
W
E
E
E
W
W
W
W
W
W
E
E
lorglin.
Ill 8
o. 1 2 '49
o. 10-26
o. 1 5-26
O. I 2'26
-o. 16-87
-0.17-65
-o. 2577
o. 22-72
-0.23-99
o. 22-91
+ o. 35-62
+ o. 36-50
+o. 38-31
+ o. 36-44
+ o. 19-07
+ o. 27-69
+ o. 9-01
+ o. 9-63
+ o. 675
+ o. 8-98
+ 6-37
-r 0-19
+ 16-95
+ 0-08
+ I7-63
+ 0-05
+ 46-56
+ '5
+ 46-56
+ 0-05
+ 6-37
+ 0-19
+ 16-95
O'l I
+ 4 6 '59
o-o i
+ 6-37
- 0-32
+ 13-01
0-03
I
-0-358
-0-178
+ 0-044
0-066
0-023
-0-143
+ 0'1 1O
0-185
-0-093
-0-171
1
I
0-132
O-OI7
0-185
1898.
Oct. 22
Oct. 23
Oct. 28
Ki
Bradley 3147
K Piscium
loryh
E
E
W
W ;
E
W
E
E
W
W
W
W
&r
W
W
E
E
E
i E
n contimi
in s
+ o. 3-80
+ o. 8-79
+ o. 5-86
+ o. 8-34
+ o. 2-26
+ o. 8-32
+ o. 2:38
+ o. 2-55
+ o. 0-54
+ o. 2-59
+ o. 3-98
+ o. 2-32
lenidch.
+ o. 50-89
o. 4'z6
+ 0.3976
-o. 3-71
o. 24-09
-o. 370
ed.
I
+ 17-63 0-283
+ O'OI
+ 46-60 0-054
+ 0-45
+ 46-60 0-131
+ 0-45
+ 13-01 0-013
- 0-15
+ 17-63 0-117
+ O'OI
32-85 0-051
o-o i
+46-63 +1-183
+ 0-02
+ 46-63 +0-937
+ O-26
> 24 - o8 +0-843
+ 0-15
i
-0-135
-0-049
+ 1-037
e Delphini
Groombridge 3548
a Equulei
Polaris
<j> Piscium
Bradley 3147
Polaris
y Piseium
<h Piscium
Polaris
Bradley 2003...
/ Piscium
Polaris
Aquarii
/Piscium
Bradley '5147...
75 Draconis
K Piscium
Bradley 1672 S.P..
10 Ceti
f Delphini
Groombridge 3548
ft Aquarii
Polaris
o Aquarii
7; Draconis
44 Piscium
Polaris
B Capricorni
ft Piscium
Bradley 2993
y Aquarii
Groombridge 22838. P.
ERROR IN AZIMUTH.
Transit D Values of n continued.
Date.
d
o
Names of Stars.
I
Tabular
R.A.-
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
Date.
Names of Stars.
a - i Tabular
D A
J3 IV. A.
'$ Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
1898.
Oct. 30
Oct. 3 1
Oret
viroornbriilge 3548.
li Aquarii
moid
E
E
VV
w
E
E
E
E
W
W
W
W
W
\v
E
W
E
1
W
w
w
w
w
w
K
E
E
K
W
E
/ continue
m s
+ o. 13-57
o. 4-40
+ o. 9-32
-o. 4-41
+ o. 12-38
-o. 4-35
o. 38*90
-o. 4-47
-0-37-43
-o. 4-27
+ o. 9-39
o. 4-46
+ o. 40-72
-o. 4-44
+ o. 38-15
-o. 4-44
+ o. 14-42
-o. 4-71
+ o. 10-71
-o. 4-65
+ o. 16-14
-o. 4-55
o. 46-67
o. 4-40
+ o. 12-33
-o. 4-64
+ o. 53-91
-o. 476
+ o. 53-04
-o. 476
d.
+ 16-96
O'l 1
+ 13-01
O'OI
+ 17-64
+ O'OI
-32-84
O'l I
-32-84
+ 0'20
+ I3-36
- '45
+ 46-64
+ 0-05
+46-64
+ 0-05
+ 16-95
O'l I
+ 13-01
+ o-io
+ 17-64
+ 0-09
-32-84
+ 0-26
+ 13-36
0-03
+46-64
+ 0-05
+ 46-64
+ 0-05
8
+ 1-053
+ '-54
+ 0-949
+ I-052
+ 1-004
+ 1 003
+ 0-968
+ 0-914
+ T12I
+ 1-189
+ 1-179
+ 1-277
+ 1-267
+ 1-259
+ I-24I
a
+ I -OOO
+ 1-219
1898.
Nov. I
Nov. 3
Nov. 4
Nov. 5
Gre
Groomhridge 3548.
3 Aquarii
snwic
W
W
E
E
W
W
W
W
w
w
E
E
E
K
W
W
W
w
E
W
w
W
W
VV
w
w
E
E
h contimu
m s
4-0. 14-85
o. 4-90
+ o. 12-17
o. 4-88
+ o. 17-40
o. 4-88
+ o. 1 1-28
-o. 5-13
+ o. 8-57
-o. 5-25
+ o. 12-92
-o. 5-27
o. 42-87
-o. 5-36
+ o. 9-13
-o. 5-11
+0.46-52
o. 5-20
+0.47-59
o. 5-20
+0.4372
o. 5-15
+ o. 8-40
-o. 5-48
+ o. 7'9'
-o. 5-62
+ o. 13-58
-o. 5-69
id.
+ 16-96
O'l I
+ 13-36
0-03
+ 17-64
+ o-o I
+ 16-96
o-ii
+ 13-01
0-03
+ 17-64
+ O'OI
-32-83
+ O'02
+ 13-36
+ 0-12
+46-65
+ 0-05
+46-65
+ 0-05
+46-65
+ 0-09
+ 13-01
O'OI
+ 13-01
0-03
+ 17-64
+ O'OI
a
+ 1-157
-r-i-273
+ 1-264
+0-961
+ 1 -060
+ 1-032
+ 1-142
+ 1-075
+ 1-109
+ 1 133
+ 1 -049
+ 1 -066
+ 1-037
+ 1-093
+ i'H*
+ 1-077
+ 1-066
Bradley 2003...
Bradley 2997
77 Aqiiarii
y Aquarii . .
Br.idley 3 147 ....
Bradley 3 1 47
K Piscium
Bradley 1672 S.P..
33 Piscium
Groombridge 3548.
/J Aquarii
Bradley 1672 S.P..
5 8 Piscium
Bradley 2993
y Autiarii
2 Ursae Minoris
20 Ceti
Bradley 3 147
Polaris
K Piscium
/' Piscium
Bradley 1672 S.P..
Polaris
f Piscium
2 Ursse Minoris
Groom bridge 3548.
(3 Aquarii
Bradley 2003..,
flPegasi
Braillev 314.7.
/* Piscium
L Piscium
Bradley 1672 S.P..
y Pe' r asi...
Bradley 2993
a Aquarii
2 Ursse Minoris....
20 Ceti...
Polaris
f Piscium
Polaris
Bradley 3147
/Piscium
1J/.8 TELEGRAPHIC DETERMINATION OF LONGITQDE, GREENWICH-KILLORGLIN, 1898.
Transit D Values of TO continued.
Date.
Names of Stars.
Position.
Tabular
oti^d Fact -
Transit.
H
Apparent.
n
Adopted.
Date.
Names of Stars.
Tabular
1 R.A.-
j Observed
( Transit.
Factors.
n
Apparent.
n
Adopted.
1898.
Nov. 5
Nov. 6
Nov. 10
Oret
2 Ursae Minoris....
20 Ceti
nwicf
W
w
W
w
E
W
\v
vv
E
E
W
W
W
W
E
E
E
E
W
W
E
E
E
E
W
W
W
w
i continue
m s
+ o. 878
-c. 5-67
+ -45'33
-o. 5-56
+ o. 41-68
-o. 5-56
4-0.4273
-o. 5-42
+ o. 9-80
-o. 5-99
+ o. 14-70
-o. 579
-0.46-13
-o. 5-39
+ o. 47-84
o. 5-60
+ o. 5-07
-o. 5-89
+ o. 3-52
-o. 5-99
+ o. 5-09
o. 6 - oo
-0.27-27
-- 575
+ o. 3-95
-o. 5-71
+ o. 31-60
-o. 5-96
d.
+ 13-36
0-03
+ 46-66
+ 0-05
+ 46-66
+ 0-05
+ 46-66
+ 0-26
+ 13-01
6'20
+ 17-64
+ O'Ol
-32-83
+ 0-26
+46-66
+ O'lO
+ 16-96
O'l I
+ 13-01
- 0-03
+ 17-64
+ o-o i
-32-82
+ 0-26
+ 13-36
+ O'I2
+ 46-68
+ 0'12
8
+ 1-079
+ 1-092
+ 1-014
+ 1-038
+ 1-194
+ 1-157
+ 1-230
+ 1-150
+ 0-642
+ 0729
+ 0-630
+ 0-650
+ 0-729
+ 0-808
8
+ 1-058
+ 1-183
+ 0-698
1898.
Nov. i o
Nov. 12
Nov. i 3
Nov. 1 6
Gree
Polaris
mricl
E
\V
W
W
w
w
w
w
E
E
W
W
W
W
E
E
W
W
Kit
W
W
E
E
E
E
W
W
i continue
m s
+ o. 25-42
-o. 5-96
+0.27-52
-o. 5-69
+ o. 27-05
-o. 5-94
4-0. 4-92
o. 6-56
+ o. 9-20
-o. 6-37
-o. 33-91
o. 6-36
+ o. 6-76
o. 6-69
+ o. 35-02
-o. 6-82
+0.37-30
o. 6-38
Lorc/lin.
o. 10-05
-o- 7H5
-o. 13-49
o. 8-41
-o. 25-47
o. 8-6 1
o. 20-09
-o. 8-39
d.
+ 46-68
+ 0'12
+46-68
+ o-z6
+46-69
+ 0-57
+ 13-01
O'OI
+ 17-64
+ 0-42
32-82
+ '0-26
+ .3-36
0-03
+46-69
+ 0-05
+46-69
+ O'lO
+ 13-01
0-03
+ 13-36
+ 0-09
+ 46-70
+ '57
+ 46-70
+ 0-28
+ 0-674
+ 0-716
+ 0-716
+ 0-883
+ 0-904
+ 0-833
+ 1-004
+ 0-896
+ 0-937
-0-199
-0-383
-0-365
0-252
+ 0-716
+ 0-907
0-300
^ Pisciuni
Polaris
Polaris
/Pisciuni
ft Piscium
Polaris
f Piscium
Polaris
T Piscium
q Piscium
Bradley 2993
Bradley 2003...
a~ Aquarii . ...
Bradley 3 14-7..
Bradley 3147
K Piscium
v Pegasi
Bradley 1672 S.P..
v Pe"asi . .
Bradley 1672 S.P..
y Pegasi
2 Ursje Minoris
20 Ceti
Polaris
u, Piscium
Polaris
Groombri'ige 3548
/3 Aquarii
/ Pisciuni
Polaris
Bradley 2993.
I^radley 2993
y Aquarii
Bradley 3147
K Piscium
Bradley 1672 8.P.
y Pegasi
2 Ursee Minoris
2 Ursse Minoris-...
8 Piscium
Polaris
Polaris
f 1 Piscium
ERROR IN AZIMUTH.
Transit D Values of n continued.
149
Date.
Names of Stars.
Tabular
.3 R.A.
Observed
Transit.
Factors.
Killorglin continued.
1898.
Nov. 17
Nov. 1 8
Bradley 2993.
y Aquarii
Bradley 2993
Pegasi
W
W
E
E
Bradley 314.7 ! \V
y Piscium.
Bradley 1671 S.P..
y Pegasi
2 Ursse Minoris
e Piscium....
Polaris .
6 Ceti..
Polaris .
54 Ceti.
Bradley 2993.
Aquarii
Bradley 2993
Pegasi
Bradley 3147
K Piscium . . ,
Bradley 1672 S.P..
5 1 Piscium
2 Uiv-ise Minoris
e Piscium....
W -
W -
W -
E -
E
E
W
W
W
W
E
E 1-
W [.
W i-
W
W
E
E
-o. 1576
-O. 13-20
-o. 15-58
-o. 13-36
-o. 14-96
-o. 13^46 ,
o. 10-96
o. 13-63
o. 16-70
o. 13*96
-o. 24-08
-o. 13-96
-o. 17-27
-o. 14-12
o. 19-92
o. 18-62
-o. 20-21
-o. 18-71
-o. 18-81
o. 18-92
-o. 20-50
-o. 19-14
-o. 20-73
o. 19-22
+ 13-02
0-03
+ 13-02
+ 0-18
+ 17-65
+ 0-05
32-81
+ 0-26
+ 13-36
+ 0-13
+ 4670
- 0-15
+ 4670
+ 0-19
+ 13-02
- 0-15
+ 13-02
+ 0-18
+ 17-65
+ O-I2
32-8l
+ O'l I
+ 0-09
o-
o
>arent.
n
Adopted.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
i
1-197
''73
>-o85
>-o8i
)-209
)-2I7
>-o68
1-098
117
ooi
041
1 14
8
-0-I 55
0-089
1898.
Nov. I 8
Nov. 21
Nov. 26
Nov. 27
Nov. 28
Kill
Polaris
orglii
E
E
W
W
W
W
E
E
E
E
W
W
W
W
W
W
VJ
E
W
W
W
W
i continue
m s
o. 29-28
-o. 19-37
-0.22-37
-O.I9-35
-o. 34-52
-0.34-33
-o. 35-04
-0.34-55
-I. 2-97
-I. 2-35
-I. 2-51
-I. 2-58
-I. 7-72
-I. 8-56
-I. 6-63
-I. 8-58
I. 4-10
I. 8-70
-I. 9-13
-I. 8-98
I. 1 1-03
-1. 13-90
d.
+ 46-71
+ 0-05
+ 46-7.
+ 0-26
+ 17-65
+ o-oi
32-81
+ 0-26
+17-65
+ o-oi
+ 17-65
+ 0-09
+ 13-37
'O3
+ 4 6 74
+ 0-05
+4 6 74
+ 0-21
- 24-04
+ 0-35
j
+ 4 6 74
+ 0-26
8
O-2I2
0-065
O'Ol 1
+0-015
-0-035
+ 0-004
+0-063
+0-042
+ 0-099
+ 0-006
+ 0-062
8
0-089
+ O'OO2
0-016
+ 0-068
+ 0-062
f Piscium
Polaris
77 Piscium. ..
Bradlev 314.7
K Piscium
Bradley 16728.?..
v Peeasi..,
Bradley 3147...
K Piscium
Bradley 3147...
t Piscium
2 Ursae Minoiis....
20 Ceti
Polaris
/' Piscium .
TT Piscium
Groomb. 2283 S.P.
8 Arietis
Polaris .
rj Piscium
GREENWICH OBSERVATIONS.
150 TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH-KILLORGLIN, 1898.
Transit E. Values of n.
Date.
Names of Stars.
Position.
Tabular
R.A.-
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
Date.
Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
N
Apparent.
n
Adopted.
1898.
Oct. 1 1
Oct. 1 2
Oct. 1 3
Oct. 17
Bradley 2003...
Gn
E
E
W
W
W
W
W
W
E
K
W
W
E
E
E
E
W
W
E
E
W
W
E
E
E
E
W
W
>,enwich.
m s
o. 2'oy
+ o. 0-60
-o. 2-34
+ o. 0-69
+ o. 6-10
+ o. 0-63
o. 8-16
+ o. 0-63
-o. 8-53
+ o. 0-59
-o. 3-29
+ 0. 0'6o
+ 0. 8-8 4
+ o. 0-26
-o. 9-31
+ o. 0-30
o. 8-62
+ o. 0-46
o. 3-06
+ o. 0-25
o. 6-27
+ o. 0-39
+ o. 13-33
0. 2M2
+ o. 9-91
-o. 1-95
-0-37-57
-o. 1-87
+ I3-OI
0-03
+ 17-63
+ O'OJ
-32-88
+ O'l I
+ 4-6-57
+ o-n
+ 4 6 '57
+ 0-15
+ 17-63
+ 0-05
-32-88
+ 0-26
+ 46-57
+ 0-09
+ 46-57
+ 0-28
+ 13-01
O'OI
+4 6 '57
+ 0-09
+ 16-95
- 0-15
+ 13-01
+ O'lO
-32-86
+ 0-26
8
0-205
0-172
0-166
0-189
-0-197
0-221
-0-259
O-207
0-196
-0-254
-0-144
+ 0-904
+ 0-919
+ 1-078
a
O-lSg
0-221
-0-I 99
+ '995
1898.
Oct. 1 8
Oct. 19
Oct. 22
Oct. 23
0m
Groombridge 3548
a Equulei
vnwic
W
W
E
E
E
E
W
W
W
W
E
W
W
W
W
W
E
E
W
W
E
E
E
E
E
E
W
W
/ continue
III S
+ o. 17-39
o. 2-24
+ O. I2'OO
o. 2-65
+ o. 17-21
o. 2-52
+ o. 12-65
O. 2-12
+ o. 51-60
-o. 2-39
+ o. 44-04
-o. 2-39
+ o. 12-76
-o. 2-74
+ o. 51-50
-o. 2-74
+ 0.48-62
-o. 2-53
o. 24-98
o. 2-90
+ o. 8-82
o. 3-12
+ o. 10-25
o. 3-22
+ o. 15-42
-o. 3-27
- o. 40-92
-o. 3-17
d.
+ 16-95
+ 0-08
+ 13-01
0-03
+ 17-63
+ O'OI
+ 13-35
+ 0-13
+ 46-60
+ 0-05
+46-59
+ 0-05
+ 13-36
- 0-03
+ 46-60
0-03
+46-60
+ 0-21
24-08
+ 0'35
+ 12-13
+ 0-22
+ I3-OI
+ 0-18
+ 17-64
+ 0-16
-32-85
+ 0-26
I
+ 1-164
+ 1-123
+ 1-120
-f i 1 1 7
+ i- 1 60
T 0-997
+ 1-157
+ 1-163
+ 1-103
+ 0-904
+ 1-003
+ 1-050
+ 1-069
+ 1-140
s
+ 1-114
+ 1-132
+ 0-954
+ 1-1 1 1
y Aquarii
Bradley 3147
K Piscium
Bradley 2993
Bradley 1672 S.P..
to Piscium
Braillpy 3 1 A?
K Piscium
Polaris
2 Ursa; Minoris
c Piscium
<o Piscium
Polaris
o Piscium
f Piscium
Bradley 3147...
Polaris
/ Piscium
2 Ursse Minoris....
20 Ceti
19 Piscium
Bradley 1672 S.P..
v Peeasi
Polaris
e Piscium
20 Ceti
Polaris
105 Piscium
Bradley 2003
Groomb. 2283 S.P.
a Aquarii
Polaris
Grooinltridge 750..
A Tauri
v Piscium
Groombridgc 3548.
Aquarii
Bradley 2993
Bradley 2993
Bradley 314-7
Pegasi
c 8 Pecasi
Bradley 1672 S.P..
y Pecasi...
Bradley 1672 8.P..
ERROR IN AZIMUTH.
151
Transit K Values of n continued.
Date.
_ Tabular
Names of Stars. J^^ Factors . ^"^
Transit.
n
Adopted.
Date.
Niimes of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors - !Appa"rent.
n
Adopted.
1898.
Oct. 23
Oct. 24
Oct. 28
Oct. 29
On
2 Ursse Minoris
8 Piseium
>nwii'
W
w
E
E
E
E
W
W
w
w
w
w
K
E
Ki
W
W
E
F
E
E
W
W
w
w
E
E
W
W
'( continu<
in a
+ o. 11-87
-o. 3-25
+o. 48-90
-o. 364
+ o. 9-29
o. 3-60
o. 42-85
-o. 3-63
+ o. 12-19
-o. 3-68
+ o. 50-55
o. 3-66
+ o. 52-51
-o- 3'3"
llonjlin.
o. 29-10
-0.28-33
-o. 27-99
-o. 29-34
o. 28-46
-0.29-33
o. 30-87
-o. 29-39
o. 30-91
-0.29-45
-. 35'H
o. 35-20
-0.33-12
-- 35>7
id.
+ 13-36
+ 0-12
+ 46-61
- 0-15
+ I3-01
O'OI
-32-85
+ O'O2
+ I3-36
'3
+ 46-61
+ 0-03
+ 46-61
+ 0-26
+ 13-01
0-03
+ 17-64
+ 0-05
-32-85
+ 0-26
+ 13-36
+ 0-08
+ 46-63
+ 0-05
+ 17-64
+ o-o i
-32-84
+ 0-26
+ ''142
+ 1-124
+0-990
+ ->93
+ 1-185
+ 1-164
+ 1-204
-0-059
+ 0-077
0-026
O'l I I
0-031
+ 0-003
-0-071
+ 1-111
+ 1-139
0-021
O-O23
1898.
Oct. 29
Oct. 3 1
Nov. 3
Nov. 5
Kil
2 Ursae Minoris....
/x Andromedse ..
lorgli
W
W
E
E
W
W
E
E
E
E
W
W
w
w
E
W
E
E
W
W
W
w
w
w
E
E
i continue
m a
-0.37-87
-o. 35-84
o. 29-70
o. 36-04
-0.47-42
o. 46-06
-o. 44-90
o. 46-52
o. 50-69
o. 46-58
-0.49-70
-o. 4678
-o. 55-94
o. 46-90
o. 40-84
o. 46-92
-o. 3-41
-- 3-14
+ o. 2-91
o. 2-96
-o. 7-23
-o. 2-99
o. 14-10
o. 1 1-62
-o. 18-61
-o. 11-44
d.
+ 13-36
+ 078
+46-64
+ 0-26
+ 13-01
- 0-15
+ 17-64
- 0-17
-32-84
+ O'26
+13-36
+ 0-78
+ 46-64
+ 0-45
+46-64
+ '45
+ 17-64
+ "43
-32-83
0-07
+ 13-36
0-O2
+ I3-OI
+ 0-46
-i-17-64
0-06
0-161
+ 0-137
0-105
+ 0-091
+0-124
0-232
0-196
+0-132
0-016
-0-179
-0-317
0-198
-0-405
O'OlJ
0-031
0-132
-'343
Polaris
Polaris
6 Ceti
Bradley 200?...
Bradlev 200,3 ..
ij Aquarii
Bradley 1672 S.P..
Piazzi 0. 33
2 Ursse Minoris
20 Ueti
Aquarii
Bradley 3147
>!/- Aquarii
Bradley 1672 S.P.
Polaris
33 Ceti...
2 Ursse Minoris...
p. Andromedae.. .
Polaris
i] Piscium... .
Polaris
Bradley 2003..
<f> Piscium
y Aquarii
Bradley 3147
Bradley 314.7...
1 9 Piscium
Bradley 1672 S.P..
y Peeasi ,
T Pegasi
Bradley 1672 S.P..
27 Piscium
2 Ursie Minori*
77 Piscium
2 Urses Minoris
i 5 Ceti
f Piscium ....
Bradley 2993
Bradley 3 1 47
K Pisciura
Bradley 1672 S.P..
v Pe^asi . .
Bradley 3 14.7...
20 Piscium
TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH-KILLORGLIN, 1898.
Transit E Values of n continued.
Date.
Names of Stars.
Tabular
.2 1 R.A.-
Observed
Transit.
Factors.
n
Apparent.
n
Adopted.
Date.
Names of Stars.
B - Tabular
.2 R.A.
S Observed
(2 Transit.
Factors.
n
Apparent.
n
Adopted.
1898.
Nov. 5
Nov. 8
Nov. 9
Nov. 10
Nov. 13
Kill
Bradley 1672 S.P..
Piazzi 0. 33
yrglir)
E
E
E
E
W
W
W
W
E
E
W
W
W
W
E
E
E
E
W
W
W
W
E
E
E
E
continue
m s
+ o. 7-01
-o. 11-75
o. 30-80
o. 27-01
o. 36-96
-0.27-29
-o. 1471
-0.27-35
-0.37-84
o. 28-05
o. 40-14
-0.31-72
-0-4577
-o. 3171
-o. 40-52
-0.31-94
o. 40-63
-0.3673
-i. 8-58
-o. 37-03
-0.53-56
-o. 52-15
-o- 50-53
-0.52-78
o. 56-10
-o. 52-85
1.
-32-83
+ O'O2
+ 13-01
O'OI
+ 17-64
+ 0-43
-32-83
+ 0-26
+46-67
+ 0-57
+ 13-01
+ 0-57
+ 17-64
+ 0-42
+ 17-64
+ O'l I
+ 13-01
+ 0-18
+ 46-68
- 0-15
+ 13-01
0-03
+ 17-65
+ o-oi
32-82
+ 0-26
8
-0-571
0-291
0-562
0-382
0-212
-0-677
0-816
-0-489
-0-304
-0-675
0-108
+ 0-128
+ 0-098
8
-0-343
0-362
-0-618
0-490
+ 0-040
1898.
Nov. 1 3
Nov. 17
Nov. 18
Nov. 20
Nov. 22
Kill
2 Ursse Minoris
e Piscium
ir</lir
W
W
W
W
Ore
E
E
E
K
W
W
W
W
E
E
E
E
E
E
W
W
W
W
W
W
W
W
continue
111 8
-o. 52-47
-o. 52-78
-o. 5361
o. 52-81
enwic/t.
+ o. 10-95
-o. 7-45
-0.43-38
o 7'6i;
J.
+ I3'36
+ 0-09
+ 46-69
+ 0-05
+ 17-65
+ o-n
-32-81
+ 0'02
+ I3-02
+ 0- 4 3
+ 46-/0
- 0-I 5
+ 46-70
+ '37
+ 17-65
-t- '05
-32-81
o 05
-32-81
O'Ol
+ 13-36
0-03
+46-72
o'3
+ 16-96
- 0-15
s
+ 0-023
0-017
+ 1-049
+ 1-089
+ 0^908
+ 0-892
+ 1-196
+ 0-977
+ 1-186
+ 0-907
+ 0-931
+ 0-897
+ 1-113
8
+ 0-040
+ 1-069
+ 1-048
+ 0-997
Bradley 2003 ..
Polaris
/" Piscium . .
17 Aquarii
Bradlev 314.7..
Bradley ? 14.7...
Bradley 1672 S.P.
Polaris . .
Bradley 1672 S.P.
Bradley 2QQ* ..
Bradley 2993
-l-o. 4-00
-o. 7-44
+ o. 337'
o. 8;io
+ o. 48-39
o. 7-62
-t-o. 9 - oi
o. 8-19
-0.47-26
o. 8-42
-0.37-83
o. 8-07
+ o. 4-28
o. 8-19
+0-3376
o. 8-19
+ o. 10-38
-o. 8-67
A Peeasi
n Pe^asi . .
Polaris
Bradley 314.7...
1 Ceti
v Pegasi
Bradley 314.7
T~ Arietis .
51 Piscium
Bradlev 314.7...
Bradley 2993 .
19 Piscium
Bradley 1672 S.P.
4 Ceti
Bradley 1672 S.P.
10 Ceti
Ceti
Bradley 2993
y Aquarii
2 Ursse Minoris....
20 Ceti
Polaris
Bradley 3147
K Piscium
20 Ceti .
Groombrid<;e 3548
Biadley 1672 S.P
v Peeasi...
ERROR IN AZIMUTH ; TABLE OF INSTRUMENTAL ERRORS.'
. Transit E Values of n continued.
153
Date.
Names of Stars.
o
*-
'3
Tabular
,^' A '~, Factors.
Observed
Transit.
n.
Apparent.
n.
Adopted.
Date. Names of Stars.
Position.
Tabular
R.A.
Observed
Transit.
Factors.
n.
Apparent.
n,
Adopted.
1898.
NOV. 22
Xnv. 15
Gret
Bradley 2993
moid
E
E
E
E
E
E
W
w
E
E
E
E
E
E
W
W
w
W
, continue
m a
+ o. 10-91
-o. 879
+ o. 18-37
-o. 8-95
-o. 59-81
-o. 8-82
+ o. 58-95
-o. 8-68
+ o. 10-58
o. 9-60
+ o. 6-37
-o. 9-54
+ 0. I l'22
-o. 9-23
o. 46-96
-o. 9-17
+ o. 4-51
o. 9-21
A.
+ 13-02
0-03
+ 17-65
o - o6
32-80
O'OI
+46-72
+ 0-05
+ 16-96
+ 0-03
+ 13-02
'3
+ 1765
+ 0-09
32-80
- 0-08
+ '3"37
0-03
s
+ 1-510
+ 1-542
+ '555
+ ''449
+ 1-191
+ 1-219
+ 1-165
+ '155
+ 1-024
+ 1-409
+ rii8
1898.
Nov. 25
jtfov. 27
Greenwid
Polaris W
/ continue
111 8
+ o. 39-05
o. 9-02
+ o. 41-66
o. 9-22
+ o. 10-61
o. 9-60
-0.46-97
o. 9-60
-l-o. 5-17
-o. 9-54
+0.49-41
-o. 9-92
o. 39 68
o. 9-84
+o. 5-38
-o. 9-50
d.
+ 4673
+ 0-09
+ 4 6 73
+ 0-06
+ 17-65
+ 0'O2
32-80
+ 0'02
+ 13 4 37
+ 0'08
+ 4676
+ 0-17
-24-04
+ 0-17
+ 12-14
+ O'22
8
+ 1-031
+ I-090
+ 1-I46
+ I-I40
+ I-I07
+ 1-273
+ 1-233
+ I-248
8
+ 1-II8
+ 1-206
y A ou arii
e Piscium
W
E
E
W
W
W
w
w
w
E
E
E
E
W
W
JinitllfV 3 14.7
Polaris
20 Pisuium
Bradley 1672 S.P.
i o Ceti
Piazzi I. 175
Bradley 3147...
Polaris
/ Piscium
Groombridge 35+8
fl Aquarii
44 Piscium
Bradley 1672 S.P..
44 Piscium
Bradley 2993
2 Ursae Minoris
Piazzi 0. 189
y Aquarii
Bradley 3147
i Piscium ..
p, Ceti
Bradley 1672 S.P.
1 2 Ceti
Groomb. 2283 S.P.
Tauri
2 UrsiB Minoris
20 Ceti
Groombridge 750...
X Tauri
XLVALUES OF THE INSTRUMENTAL CONSTANTS I, m AND n.
In the following tables the values of I (the level-error) converted into seconds of
time, the values of n and the deduced values of m are collected.
The values of m are derived from the adopted values of I and n by the formula,
m =(j n sin X) sec. X, where X is the latitude.
The adopted values of X are :
Latitude of Greenwich,
Killorglin,
51 28' 39" N.
52 6' 46" N.
154 TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH-KILLORGLIN, 1898.
Tranait D. Ti-anxit E.
Date.
I
n.
m.
Date.
I.
n.
Mi
-\y
E.
W.
E.
W.
E.
W.
E.
Killonjlin.
Greenwich.
1898.
8
S . 8
8
S
1898.
a
s
8 8
Oct. 1 1
-0-315
-0-339 -0-132
-0-344
-0-383
Oct. 1 1
+ o" [ 39
+ 0-157
O-lSg +O'46l
4 0490
4
-0-349
-0-373-0-017
-0-547
0-586
12
+ 0-106
+ 0-123
-0-221 +0-448
+ 0-475
it
0-187
O"2 I 1 0-185
0-067
0-106
13
+ 0-174
+0-191
0-199 +'53
+ 0-557
22
-0-259
0-283 0-135 ' 2 47
0-287
I7+0-I79
+0-197
+ 0-995 0-962
-o-933
2 3
0-187
O'2 I 1 0-049 0-241
0-280
18 +0-22)
+0-238
f 1*114 -044
- -017
'9
+ c"2og
+0-226
+ 1-132
- -086
-058
22
+ 0-086
+ 0-103
+ 0-954
-060
- -33
23
-+-0-193
+ 0'2 10
+ i-i ii
- -086
- -058
Greenwich.
24
+ 0-177
+ 0-194
+ 1-139 ~ -'47
- -119
Oct. 281 + 0-140
f o-i 16
+ 1-037
1-078
-1-116
3
+ 0-190
+ 0-166
+ I 'COO
-0-951
0-989
Killorglin.
3'
+ 0-297
+0-273
+ 1-219 ''054
1-092
Nov. i
+ 0-301
+ 0-277 + 1-2 4 2 1-076
-1-115
Oct. 28
0-014
+ O-OO3
O'O2I
+ 0-005
+ 0-033
3
+ 0-199
+ 0-175 +''77 ''033
1-071
29
0-007
+ O-OI I
0-O23
+ 0-018
+ 0-047
4 +0-187
+ 0-1631+1-066 1-039
1-078
3'
+ 0-128
+0-145
O-03I
+ 0-247
+ 0-275
5 +O"2O2
+ 0-178 '+ 1-05^ 1-004
1-042
Nov. 3
+ 0-129
+0-146
0-132
+ '379
+ 0-407
6 +0-213
+ 0-189 4-I*I3 1-1 43
1-183
5
+ 0-214
+0-231
-0-343
+ 0790
+ 0-817
10 +0-232
+ 0-208 + 0-698 0-504
-0-543
8
+ 0-259
+0-277
0-362
+ 0-887
+ 0-920
12 +0-267
+ 0-243 +0-716 0-471
-0-509
9
+ 0-360
+0-377
0-6l8
+ 1-381
+ 1-408
13 +0-3IO
+ 0-286 +0-907 0-641
-0-679
10
+ 0-401
+0-418
0-490
+ 1-283
+ i'3'i
13
+ 0-515
+0-533
+ 0-040 +0-891.
+ 0-920
Killorglin.
Greenwich.
Nov. 16
+ 0-619
+ 0-595
-0-300 +1-394
+ I-354
Nov. 17
+ 0-241
+ 1-069!
-0-956
17
+ 0-675
+ 0-651
-0-155 |+'' 2 9 6
+ 1-257
18
+ 0-269
+ 0-286
+ 1-048 ; 0-885
0-858
18
+ 0-697
+ 0-673
0-089
+ 1-249
+ I '2 10
20
+ 0-267
+ 0-284
+ 0-997 0-824
-0-797
21
+ 0-924
+ 0-900
+ O-OO2
+ 1-501
+ 1'462
22
+ 0-435
+0-453
+ 1-409 1-071
1-042
26
+ 1 1 09
+ 1-085
0-016
+ 1-827
+ I-788
2 5
+ 0-367
+0-385
+ ni8 0-814
-0-785
27
+ 1-098
+ .074
+0-068
+ 1-700
+ 1-66I
27
+ 0-407
+0-425
+ i'2o6 o'86i
-0-832
XII. CATALOGUE OF STARS.
The following stars were selected for observation during the period of longitude
work. The fourth column contains the Tabular Mean R.A. for 1898'0 given in the
Nautical Almanac Connaistance des Temps (C.T.), M. Lcewy's Catalogue (L), or the
Berliner Jahrbuch (B.J.), as shown in column 2. Column 6 contains corrections to
these Right Ascensions found by comparison of the Ephemeris with the Greenwich
Ten Year (1890) Catalogue, or in the case of stars which are not in this catalogue
with observations made with the New Altazimuth at Greenwich in the year 1899.
CATALOGUE OF STARS.
155
In the cases of some stars, which are not included in any of the ephemerides mentioned,
the Right Ascension was taken from the Greenwich Ten Year Catalogue. The
circumpolar stars given in the table on p. 145 are included in the table which follows.
Name of Star.
Eplieiiien's.
Magnitude.
Tabular Riglit
Asofii.sion,
1898-0.
Approximate
Declination.
Correction
to
Ephenieri>.
Greenwich Catalogue.
69 Aquihi 1
L
r '2
h in &
2O 2J. IQ"O6
313
8
+ o'o6
T<ui Year 1 890
e Delphini
N.A
5 *
4.- 1
20 28 20 35
+ IO s7
O'OO
Ten Year. 1890.
/3 Delphini
L
VI
2O 32 ' ^'Sj.
+ 14 14
+ 'oy
Ten Year. 1890.
Bradley 2701.
L
7's
2O 33 |6'O2
8 cc
4- o 37
Ti-ii Year, 1890.
75 Draconis
c-6
20 34. ^8';o
+ 81 4
Ten Year, i 890.
a Delphini .
N A
4*O
2O 3 J. s 3*Q8
+ 1 C 33
-1- O'OI
Ten Year, 1890.
a Cygni
N.A.
I*C
2O 37 C7'2I
+ 44 r r
O'OO
Ten Yfear, 1890.
30 Vulpeculge
C'l
20 *io 27*60
-4- 24. C4.
Ten Year, 1890.
e Cyni ..
N.A.
2'7
2O 4.2 1"O3
+ 33 31
0-03
Ten Year, 1890.
e Aquavii
N.A
3'8
2O J.2 Q'2 ^
Q C2
O'OO
Ten Y T ear, 1890.
i 5 Delphini
L
ZO 4.4. 4.6*o6
-f- I 2 IO
-j- O'O2
Altazimuth Obs.
. AiiUitrii .
X.A
4-8
2O A7 Q'I2
Q 22
O'OO
Ten Year, 1890.
32 Vulpeculse ...
N A
C*I
2O CO I2'73
4- 27 4.O
O'OI
Ten Year, 1890.
16 Delphini
L.
s/4
20 co 4.6'<t8
-(-12 II
+ o - o6
Ten Y'ear, 1890.
33 VulpcculsB
C*8
2O C3 d.2'72
--I-2 I C4
Ten Year, 1890.
6 Capricorni
N A
A"2
21 O I2'82
17 ^8
O'OO
Ten Year, 1890.
6 1 Cy (f ni
N A.
S*3
21 2 IQ'37
4-^8 ic
+ 0-04
Ten Year, 1890.
y Kq uulei
L
4'8
21 5 22'8o
+ Q 4.3
+ o'oc
Ten Year, 1 890.
t Cvtnii ...
N.A.
VC
21 8 3s*67
-I-2Q 4Q
O'OI
Ten Year, 1 890.
a Equtllei
N A
4*1
21 IO 4.3*4.7
-1- 4- CO
+ O'O2
Ten Year, 1 890.
30 Capricorni
L.
C'4
21 12 I4*OO
l8 2C
+ O'lO
Ten Year, 1890.
a Cephei
N A
2-6
21 l6 8'64 /
-4-62 Q
-4- o'oi
Ten Year, 1890.
i Pe< r asi
B.J.
4/3
21 17 22*IO
4- 10 22
+ O'O2
Ten Year, 1890.
Gi'oombridge 3548
ft Aquarii
C.T.
N A
7-4
3' I
21 I 9 58*54
21 26 ii '34
+ 86 37
6 i
0^46
-1- O'O2
Ten Ye-tr, 1 890.
Ten Year, 1890.
ft 2 Cephei .
N A.
3"O
2 1 27 20*64
4-7O 7
O'OI
Ten Year, 1890
Aquarii . . .
N A.
4/8
21 32 IQ'3O
8 IQ
+ O'OI
Ten Year, 1 890.
d Aijuarii
L.
C'2
21 34 22*66
+ I 4-7
+ 0-08
Altazimuth Ol>s.
( Pe"asi
N.A.
2'4
2 I 30 lO'C I
-1- Q 24
+ O'O2
Ten Year, 1890.
TT- Cygni
B.J
4*3
21 4.3 I 'CO
-1-48 co
O'O2
Ten Year, 1890.
1 6 Pe <T asi .
N A
c-n
21 48 25'! 8
4- 2 C 27
+ O'OI
Altazimuth Obs.
1 7 Pfcasi ..
C'C
21 ; i C7'88
-1- 1 1 36
Ten Year, 1890.
18 Pe'asi
6-0
21 C C 2'I C
4- 6 14
Ten Year, 1890.
a Aquarii
N A
2*2
22 O 32'6C
O 4Q
-t- O'O2
Ten Year, 1 890.
i Pe^asi
N A
4*O
22 2 15*68
4-24. C I
-1- O'OI
Ten Year, 1 890.
L.
^'8
22 C 3 'I 8
-J- C 4.2
4- O'O^
Ten Year 1 890.
7T 2 Pe< r asi
B J
4/4.
22 C 27*4.0
-1- 32 41
O'O?
Ten Year, 1890.
Cephei
N.A
2-r
22 ** l8*7Q
4- C7 42
4- o'oz
Ten Year, i 890.
Aquarii
X A
i'2
22 I I 27"OC
8 17
4- 0*01
Ten Yiiiir, i 890.
y Aquarii
N.A.
22 162 3*22
I CA
4- O'OI
Ten Year, 1890.
3 Lauertee
B.J.
4'C
22 1Q 32*8c
-t- s I 4-d.
O'O3
Ten Year, 1890.
Bradlev 2003.
L
C*J_
4-Sr 56
+ 0-26
Ten Year 1 890.
Bradley 2997
5 4-
6-c
22 21 50*40
J-8c AJ
Ten Y'ear, 1 890.
<r Aquarii
N A.
4-'8
22 2C 1J/QC
I 1 12
O'OI
Ten Year, 1 890.
58 Aquarii
L.
6'8
22 26 16*80
I I 26
-1- O'O2
Ten Year, 1 890
TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH-KILLORGLIN, 1898.
Name of Star.
Ephemeris.
Magnitude.
Tabular Right
Aseensiun,
iSgS'o.
Approximate
Declination.
Correction
to
Ephemeds.
Greenwich Catalogue.
N.A
4'2
h 111 8
22 3O 6-83
/
o 39
i
+ '3
Ten Year, 1890.
/ Pe a asi .
N.A.
3'6
22 36 22'43
+ 1018
O'OO
Ten Year, 1890.
N.A.
VI
22 38 I3'23
+ 29 41
o r og
Ten Year. 1800.
A. Pe< T asi
B.J.
4'2
22 41 37*04
+ 23 2
0-04
Ten Year, 1890.
~o Aquarii
L.
6-3
22 43 8-12
1 1 6
+ '05
Ten Year, 1890.
IL Peuasi ,.
N.A.
V7
22 41; 4*73
+ 24 4
o-oz
Ten Year, 1890.
A Aquarii
N.A.
3-8
22 47 1 7 '5?
- 8 7
+ o-oi
Ten Year, 1890.
Bradley 3033
L.
6-c
22 C2 O'3i;
c 24.
Ten Year, 1890.
o AndromediB . .
B J
V8
22 C7 I3'6o
+ 41 47
O'OI
Ten Year, i 890.
B Pe^asi..,
C.T.
var.
22 c8 40 66
+ 27 32
+ 0'03
Ten Year, 1890
a Pt*gasi ...
N.A.
2-6
22 sQ 4-O'72
+ 14- 39
O'OO
Ten Year, 1890.
c8 Pceasi...
L.
C'3
23 4 53'zo
+ 9 16
+ 0-06
Ten Year, 1890.
<ft Aquarii
L.
4*2
23 Q 2"JO
- 6 35
+ 0-05
Ten Yenr, 1890.
t^ 1 Aquarii
L.
A'C
23 10 32'7;
9 39
+ 0-08
Ten Year, 1 890.
y Pisuium
N.A.
3-8
23 II 52-60
+ 2 43
+ O'OI
Ton Year, 1890.
i^ 2 Aquarii
L.
4/c
23 12 36-07
9 44
+ '07
Ten Year, 1890.
t^ 3 Aquarii
L.
c-i
27 13 ^Q'27
IO 10
+ '4
Ten Year, 1890.
06 Aquarii
L.
c-7
2^ 14 6'C7
e \
+ '3
Ten Year, 1890.
B.J.
4*7
2^ It; ^ S'24
+ 23 1 1
O'OO
Ten Year, 1890.
C.T.
4*6
23 20 17*20
-j-22 5 I
+ o-oi
Ten Year, 1 890
K Piscium
N.A.
C'O
2^ 21 42*17
+ o 42
+ O'OI
Ten Year, 1890.
4-6
23 2^ CQ'68
+ 12 12
Ten Year, 1 890.
Bradlev 3147
N.A
r-6
2? 27 48 6^
+ 86 At:
+ 0-24
Ten Year, 1890.
1 t Andromedse.. .
C T
4' 7
23 33 7*73
4-42 42
+ 0-18
Ten Year 1 890
i Piscium
N.A
4 3
23 34 42'14
+ 1 4
+ O'OI
Ten Year, 1 890.
y Cephei
N A
3"4
23 3C Q*4C
4-77 4
+ O'O2
Ten Year, i 890.
78 Peasi
4'Q
23 38 C I*s3
+28 48
Ten Year i 890.
1 9 Piscium
L.
S"2
23 41 10*68
+ 2 Ct
o - o6
Ten Year, 1 890.
20 Piscium
L
C'7
23 42 41*88
3 2O
+ o-oi
Ten Year, 1 890
21 Piscium
L
6-1
23 44 1 4*OO
-4- O 3 I
+ o'o6
Ten Year, 1 890.
Piazzi XXIII. 200....
22 Piscium .
L.
L
6-0
6-0
23 44 58-76
-io 33
+ 2 22
+ 0-15
o-oo
Altazimuth Obs.
Altazimuth Obs
<i Pe^asi. ..
I,
C*2
23 47 I7*?6
+ 18 a
+ '7
Ten Year 1 890.
27 Piscium
N.A.
C *O
23 C 3 27'O4
47
O'O2
Ten Year 1 890.
N.A
+ 6 18
4- O'OI
Ten Year 1 890.
29 Piscium
L.
C'l
23 C6 3'68
3 36
4- o'oc
Ten Y r ear 1890
30 Piscium
CT.
4-6
23 c6 43*6 s
6 ^s
4- o Os
Ten Year 1 890.
33 Piscium
L
4-6
6 17
4- 0*0;
Ten Year 1890.
4 Ceti
L.
6-4
O 2 3O'4Q
_ 3 7
4- 0*02
Ten Y ear, 1 890
5 Ceti...
L
6-s
- 3 I
+ 0*06
a Andromedse
N.A.
u J
2 ' I
o 3 6-81
4-28 32
O'O2
Ten Year, 1890
Piazzi 0. i ..
L
O*O8
y Pe^asi
N.A.
9
vo
o 5 5 50
O 7 C 8'Q 1
I) T7
4- 14 37
O'OO
Ten Year 1 890.
Piazzi 0. 33
L
6'8
" / j V 1
4-17
4- O'2I
Ten Year 1890
Bradley 1672
N A
6'3
12 14 22'Q2
4-88 16
4- O' I 3
Ten Y r ear 1 890
t Ceti
N A
r6
Q 2 3
4- O'OI
Ten Year 1 890
Piazzi U. 60
L
6-0
V *3
, 2 47
4- O'2C
Ten Year 1890
A Piscium
N A.
r-8
4- 1 22
O'OO
Ten Year 1800
10 Ceti
L
5
6'2
j 0*06
12 Ceti
N A.
6'2
u 3/
4- o'oi
5 i Piscium
L
o 24 49 95
n 97 7'SS
T J
+ fi 7 J
14 Ceti
L
/
6-0
u *4
i 4
CATALOGUE OF STARS.
157
Name of Star.
Ephemeris.
Magnitude.
Tabular Right
Ascension,
1898-0.
Approximate
Declination.
Correction
to
Epliemeris.
Greenwich Catalogue.
15 Ceti L.
e Andromedse N.A.
8 Andromedae B. J.
55 Piscium L.
a Cassiopeise N.A.
o Cassiopeise B.J.
58 Piscium L.
Piazzi 0.189 C.T.
62 Piscium
8 Piscium N.A.
v Andromedse C.T.
20 Ceti N.A.
y Cassiopeise N.A.
^Andromedse N.A.
2 Ursse Minoris L.
70 Piscium
e Piscium N.A.
26 Ceti L.
73 Piscium L.
77 Piscium L.
e Piscium L.
rj Ceti L.
/3 Andromedse N.A.
33 Ceti L.
T Piscium L.
<f> Piaeium L.
Piscium N.A.
/ Piscium L.
0Ceti N.A.
Polaris N.A.
Piscium L.
77 Piscium N.A.
ir Piscium L.
105 Piscium L.
v Piscium N.A.
54 Andromedse C.T.
o Piscium N.A.
Piazzi I. 175 L.
54 Ceti L.
Csti N.A.
y Arietis L.
'Arietis N.A.
112 Piscium L.
60 Ceti L.
a Arietis N.A.
Trianguli N.A.
15 Arietis L.
Ceti N.A.
6 Arietis L.
Arietis L.
'* Ceti N.A.
27 Arietis L.
4-6
3'4
5'5
var.
4-6
57
57
6-0
4-6
4'4
5-0
z-3
3'9
4'5
8-0
4'5
6-0
4
6-1
57
3-6
2 '2
6'3
47
4-6
4-2
5"'
3-8
2'2
5 -2
37
5-6
6-1
47
4*
4'4
5'9
5-8
2-8
5-8
6-0
2'O
3-1
5 '9
4"4
5-6
5 '4
4'4
67
o 32
33
33
34
o 34
39
o 41
43
o 43
43
o 44
o 47
o 50
o 51
o 54
o 56
o 57
o 58
o 59
o
3
3
\
6
12
18
2 I
24
26
31
34
36
37
40
43
45
46
47
49
54
57
2 I
2 3
z 4
2 7
2 I 2
2 I 9
2 22
2 25
5I-48
9'8l
52-36
33'23
42-94
2-30
42-04
1-48
4'49
23-31
10-96
47-62
3 2 '93
5-25
47-11
48-52
38-86
34-00
35'39
32-42
6-81
27-41
IM2
18-51
*'34
12-35
23-99
32-10
55H3
43'n
50-28
1-38
4 ! '33
10-45
7-28
iS'94
0-31
9-03
27-07
25-46
55-74
0-17
50-64
57-69
25-28
28-40
58-18
35-49
26-96
20-81
44-03
H77
4
45
+ 30 18
+ 20 53
+ 55 59
+47 44
+ 11 25
+ 4 45
+ 6 44
+ 7 2
+40 31
- i 42
+ 60 10
+ 37 57
+ 85 43
+ 7 23
+ 7 20
+ o 49
+ 5 6
+ 4 22
+ 5 7
-10 43
+ 35 5
+ i 54
+ 2 9 33
+ 24 3
+ 7 2
+ 3 5
- 8 43
+ 88 46
+ 5' 37
+ '4 49
+ 'i 37
+ 15 53
+ 4 58
+ 50 10
+ 8 39
+ 3 I'
+ 10 32
10 50
+ 18 48
+ 20 19
+ 2 37
O 22
+ 22 59
+ 34 3
+ 19 i
+ 8 22
+ 19 26
+ 10 9
+ 80
+ 17 IS
+ 0-05
o-oi
0-09
+ '7
+ o-oo
0-06
+ 0-06
+ '44
4- o-oi
+ 0-20
+ O'02
O'OI
+ 0-06
0-36
+ O'Ol
O-02
+ O'06
+ "5
+ O'OI
O'O2
+ 0-04
+ 0-08
+ o - i6
O'OI
+ o'7
+ o-oi
+ '3
+ 0-07
+ O'O2
+ 0-04
+ o - o6
+ O'O2
O'I2
+ O'OI
0-14
+ O'OI
O'OI
+ 0-13
+ O'O2
+ 0-21
O'OI
- 0-13
+ O'o8
+ o-oi
+ 0-06
+ '5
O'OO
+ 0-04
1890.
1890.
1890.
1890.
Ten Year, 1890.
Ten Year, 1890.
Ten Year, 1 890.
Ten Year, 1 890.
Ten Year, 1 890.
Ten Year, 1890.
Ten Year, 1890.
Ten Year, 1890.
Ten Year,
Ten Year,
Ten Year,
Ten Year,
Ten Year, 1890.
Ten Year, 1890.
Ten Year, 1890.
Ten Year, 1890.
Ten Year, 1 890.
Ten Year, 1890.
Ten Year, 1890.
Ten Year, 1 890.
Ten Year, 1890.
Ten Year, 1 890.
Ten Year, i 890.
Ten Year, 1890.
Ten Year,
Ten Year,
Ten Year,
Ten Year,
Ten Year,
Ten Year, 1890.
Ten Year, 1 890.
Ten Year, 1890.
Ten Year, 1890.
Ten Year, 1890.
Ten Year, i 890.
Ten Year, 1890.
Ten Year, 1890.
Ten Year, 1890.
Ten Year, 1890.
Ten Year, i 890.
Ten Year, 1890.
Ten Year, 1890.
Ten Year, 1 890.
Ten Year, 1890.
Ten Year, 1890.
Ten Year, 1890.
Ten Year, 1890.
Ten Year, 1 890.
Ten Year, 1890.
Ten Year, 1890.
Ten Year, 1890.
Ten Year, 1890.
1890.
1890.
1890.
1890.
1890.
GREENWICH OBSERVATIONS.
158 TELEGRAPHIC DETERMINATION OF LONGITUDE, GREEN WICH-KILLORGLIN, 1898.
Name of Star.
Ephemeris.
Magnitude.
Tabular Right
Ascension,
1898-0.
Approximate
Declination.
Correction
to
Ephemeris.
Greenwich Catalogue.
L
6-5
h m 8
2 27 18-80
+ 14 3?
s
+ O'O4
Ten Year 1800.
Piazzi II. 123
C.T.
C'O
2 3O 2Q'O7
+ 6 24
+ O'OQ
Ten Year, 1890.
v Ceti
jST.A.
4'Q
2 3O 3I'I7
+ 5 Q
O'OO
Ten Year, 1890.
3 i Arietis
L.
5-6
2 ?I 4'O4
f- 12 O
+ O - O3
Ten Year, 1890.
8 Ceti
N A
4/1
2 ^4. I C 'l8
07
O'OI
Ten Year i 890
jj. Arietis
L
c-8
2 ^6 ^6*76
4- iq 3;
+ O'O2
Ten Year, 1890.
[j. Ceti
L
4/4.
2 ^Q 2C'4?
+ Q 41
4- 0*12
Ten Year 1890
40 Arietis
L
6*1
2 4.2 4.8'8o
+ 17 52
-1- O'O4.
Ten Year 1 890
<r Arietis....
N A
C'C
2 4.C C I"C3
+ 14 4.O
O'OO
Ten Year 1890
p2 Arietis
L.
r-8
2 CO d'4.^
+ 17 CC
+ O"O4.
Ten Year 1890
p 3 Arietis
L
C'C
2 CO 4.O'4.6
+ 17 37
4- 0-08
Ten Year 1890.
47 Arietis
L
r
2 C2 I4.*7 I
-L 2O I C
4~ 0*06
Ten Year 1890
e Arietis
N A
4-6
2 C3 22*64.
+ 2O 56
+ O'OI
Ten Year 1 800
X Ceti
L.
4-6
2 C4. I4.'7O
4-8-10
-1- O'l I
Ten Year 1 890.
a Ceti
N A
2'7
2 c6 c6*7 c
-U 7 Jf
O'OO
Ten Year 1 800
Lalande 5724
L.
7'O
3 O 4.7' C I
4- 12 4.8
Ten Year 1890
S Arietis ....
N.A.
4/C
t C J.7'64.
+ 1 Q 2O
-4- O'OI
Ten Year 1800
Arietis
L.
4-'Q
? Q 2*l8
+ 2O 40
+ O'OI
Ten Year 1 800
Groomb. 2283
N A.
7*1
1C IO 2'O7
+ 87 M
O'OI
Ten Year 1800
r 1 Arietis
JSf.A
C'2
3 15 20*16
-\- 20 4.7
O'OO
T- Arietis
L
C"2
i 16 C2'8 c
-I- 2O 2 t
+ O'O4_
o Tauri ..
N A
r8
3 7 Q 1 Q*2 t
+ 841
O'OO
f Tauri
C T
r8
J *7 i 7 JJ
32 1 58*26
TVn YPPT T Sno.
f Tauri
N A
4.'?
5 2C i j.- a 8
V *3
-1- 12 ?6
O'OO
Ten Year 1 8 go
Piazzi III. 87
L
6-c
3 28 IQ"7I
+ 17 ^O
_ O'O7
9 Tauri
L
7*O
^? ^o cS'oc
-1-22 C1
O'O C
Piazzi III. 103
L.
6-4.
7 711 tQ*4.Q
+ 16 12
0*03
17 Tauri
L.
3-8
j jj ^v ^-y
^ ^8 4.8 'Q I
-4-23 4.8
+ O'OQ
23 Tauri .
L
4 '2
3^O l6*2A
_|_ 2 2 28
7] Tauri
N A
VO
34. 1 2 C *I 6
T^ *J 5
4-2-; 4.8
O'OO
Ten Year 1 800
e Tauri
L
C'l
34.2 4_O'C6
_L. in CO
1, O'OI
Piazzi III. 187
L.
6-0
T* T W :) u
34.7 2O*o6
4-17 I
0*06
Peisei
N.A
vi
34.7 4.^'OQ
_|_ 7 I 7 C
-| O'O2
Ten Year 1800
j > Tauri . .
L
6-6
i J * 3?
A. Tauri .
C T
i> * u 73
-(-22 53
A 1 Tauri
N A
4. '4.
55 J 5
3c8 ao*7o
-4- 21 .< fi
A' 2 Tauri
L*
O'C
J JV /7
Groombridge 750
<o 2 Tauri
C.T.
L
" 5
6-7
4-6
5V A 7 4
4 4 3<-37
T*' 44
+85 17
0-26
Ten Year, 1890.
y Tauri
N A
3'Q
u u_5
v 1 Tauri . .
L
7
5*7
*.$ ^y **j
1- *5 2 3
/
iu 22 44
-t-25 2 3
CLOCK ERROR. 159
XIII. CLOCK ERROR.
The Clock Error was determined from observation of the stars given in the preced-
ing section. The following table contains the times of transit of these stars and of the
circumpolar stars used to determine the error in azimuth. Column 1 contains the star's
name ; Column 2, the position of the micrometer head, whether East or West. Column
3 gives the number of wires over which the transit was observed, or, in the case of
circumpolar stars, the number of bisections made, as explained on p. 25 of the section
Paris-Greenwich Longitude 1888. Column 4 gives the reading at which the R.A.
micrometer was set during the evening for observations of clock stars, and the mean
of the micrometer-readings at which bisections were made for the polar stars. Column
5 gives, in all cases, the time of transit over the middle wire set at the reading of the
R.A. micrometer adopted for the day. Column 6 gives the transit corrected for
collimation, level, and azimuth error. Column 7 contains the tabular apparent R.A.
of the stars taken from the ephemerides before mentioned, corrected by application
of the corrections given in the preceding section. Column 8 shows the difference of
Columns 6 and 7, which is the clock error indicated by the individual stars. Column
9 is the clock error at the local sidereal time shown in the heading on each day,
obtained from each star. The corresponding clock errors deduced from polar stars are
given in Column 8, as a check on the accuracy of the reduction, but are not given in
Column 9, as they are, of course, not used in determining final clock error.
STAR-TRANSITS OBSERVED BY ME DYSON WITH TRANSIT D.,
AND
RESULTING CLOCK ERRORS.
Star's Name.
Observed
Transit.
(S 43
3S-1
ir
*-"i o
Bill
Star's Name.
Observed
Transit.
^
II
r
"I*
2 S.2
o ftoa
m
1898 October 11.
Killorglin.
( Delphini
75 Draconis....
30 VuIpeculiB ..
f Cygni
15 Delphini....
33 Vulpeculte..
a Equulei
i Pegasi
Groom bridge 3548 .
Aquarii
d Aquarii
t Pegasi....
18 Pegasi
a Aquarii
Pegasi
12-380
14*690
12-380
11*180
12*380
20. 28. 33 '87
20. 34. 49-35
20. 40. 4.1 '41
20. 42. 1 8 '73
20. 45. 0*38
20. 53. 57-18
21. i o. 5 9 ' 1 6
21. 17. 37*80
21. 2O. 8*70
21. 32. 36*17
" 34- 39'47
21. 39. 27-36
21. 55. 19-90
22. O. 50*84
22. 36. 42'19
33-40 j 23-84
4776 ! 36"5i
40-90
18-19
59"9i
56-68
58-84
3 7 '44
6-65
35-88
39-I5
27-03
'9'57
50-53
41-85
30-89
8-10
49-64
46-14.
47^5
25-76
53-96
23-51
26*73
>4'4S
6-21
36-85
26-64
9'5 6
11-25
lo'oi
10-09
10*27
10-54
11-49
11-68
12-69
12-37
12-42
12-58
-3'36
13-68
15-21
-18-55
18-50
18-51
18-58
-18-47
18-69
-18-57
is -65
18-60
18-57
18-68
18 85
18-76
58 Pegasi
y Piscium
Bradley 3147.
12 Ceti
51 Piscium.,
e Piscium...
26 Ceti
73 Piscium.,
e Piscium....
33 Ceti
Piscium..
/Piscium...
Polaris
Polaris..., .. W
12-380
ii
13-146
12-380
"'977
11-527
23- 5- H'SS
23. 12. I4'O9
23. 28. zi"6i
o. 25. 15-09
o. 27. 33-15
o. 58. 5-18
0. 59. 0-24
1. o. 1-79
' 3-33-39
i. 5-45" 12
i. 8.39'SS
I. 12. 59-19
I. 23. 30-22
I. 23. 24-36
14-03
1 3 '77
'9'49
14*66
32-69
472
59-80
i '34
32-94
44-68
39-05
5S74
21 '06
19-32
57-59
57-05
5-29
54'54
I2-5I
43"5 2
38-59
40*09
11-49
23-16
17-37
36-80
1-82
1-82
16*44
16*72
14-20
2O'I2
20-18
21 "20
2 1 '2 1
21-25
21-45
2I-52
21-68
21-94
19-24
17-50
-1877
-18-76
-19-04
-19-01
-18-73
-18-70
-18-69
-18-74
-18-72
-18-75
-18-83
1898 October 14.
69 Aquilse E 8 12-380
f Delphini E ' 6
75 Draconis i EJ 9
ft. Aquarii E \ 9
32 Vulpeculse ' El 9
33Vulpeculse E ! 9
y Etjuulei 9 ,,
20. 23. 46-37
20. 27. 47-30
20. 34. 0-46
20. 46. 36-75
20. 49. 39-56
20. 53. 9-67
21. 4. 50*22
45'73
46-65
59-40
36-10
38-90
9'O2
49-57
22-86
23-79
35-71
13-10
'5 '94
46-09
26-50
37-13
37''4
36-31
37-00
37 '4
37-07
36-93
Killorglin.
36-60
36-64
36-53
36-57
36*61
36-50
Groombridge 3548 .
8 Aquarii
d Aquarii
a Aquarii
y Aquarii
H Pegasi
9-946
12*380
21. 19. 15-13
21. 25. 39*03
21. 33. 50-31
22. I. 0-49
22. 15. 5fI7
22. 44. 32-47
14-82
38-52
49'79
59-97
50-65
3 I- 95
53-96
-5'45
26-70
36-82
27'47
8-85
39''4
36*93
36-91
36-85
36-82
36-90
3 6 '55
36-56
36-56
36-56
36-72
1898 October 18.
( Cygni...
e Pt'giisi...
o A<-uarii.
12*360
20 - 4 1 - 397'
21. 38. 46*17
22. o. 8*59
39-52
46*08
8-53
7-96
'437
36-78
28*44
28-29
28-25
Killorglin.
27-89
27-90
27-92
t Pegasi..
8 Pegasi .
Polaris ..,
Wi 9
W 9
W 10
12*360
H
13*365
22. I. 51*36
22. 4. 39*06
I. 22.43-77
5I-2I I 19-48
38-98 | 7-25
35-30! 3-04
28*27
28-27
27'74
27-95
1898 October 22.
Killorglin.
75 Draconis....
33 -Vulpeculfe .
6 Capricorni...
y Equulei
i Pegasi
$ Aquarii
d Aquarii
e Pegasi
7 Aquarii E
Bradley 2993 E
$ Pegasi i E
58 Pegasi E
Aquarii [ E
y Piscium E
T Pegasi i E
12*360
12*360
14-771
12*360
20. 34. 25-61
20. 53. 36-52
21. O. 7-42
21. 5. 17-07
21. 17. 16-23
21. 26. 5*92
21. 34. 17-22
21.39. 5''
22. l6. 18-41
22. 21. 22*87
22. 58. 45*12
23. 4.4878
23. 8. 58*06
23. ii. 48-31
23. 15. 30-85
36-22
7*22
l6*8o
5'94
5*69
16-97
iS'io
20-45
44'73
48-46
57-76
47^9
30-47
34H3
45-94
16-95
26-39
2 5'59
'5-34
26-59
14-31
27-39
29-24
676
56-98
39'5 :
9-90
9-72 I
973 !
9'59 :
9-65
9-65
9-62
9'57 !
j
9-29
8'79
9*10
9-08
9-00
8-99
9*04
8*90
8*88
8-82
8-94
8-97
8*98
8*95
8-83
8-84
8-78
878
8-85
v Pegasi
K Piscium
Bradley 3147.
4 Ceti
5 Ceti
y Pegasi
26 Ceti
73 Piscium
77 Piscium
Andromeda;.
33 Ceti
<t> Piscium
Polaris . . .
Polaris.
12*360
D
13-080
12*360
5 12-360
4
5
9
9
8
13-786
12-183
23. 20. 12-98
23- 37^3
23. 28. 0*1 1
O. 2". 26*68
O. 2. 54*92
o. 7.55-00
0. 58. 30*28
o- 59- 3'78
1. o. 28-83
3 -
[4*88
9-05
57*11
. 23. 2-24
5-
1 2 '60
37 '5'
5 6 -93
26-37
54-61
30-03
3--52
28-58
57-50
14-63
875
50-78
21-52
46-62
3-40
35-05
3-22
38-64
40-13
37''9
6*23
23*22
17-43
3-16
3-16
8-92
9*11
6-47
8-68
8'6i
8-82
$*6i
8*61
8-61
873
8'59
8-68
12-38
8'79
8-74
8-94
'8-69
8-62
8-86
8-87
8-87
8-87
9 "oi
8-88
The rate of Clock Graham 2 was altered after Oct. 1 1 by mechanical adjustment.
STAR-TRANSITS OBSERVED BY MR DYSON WITH TRANSIT D., AND RESULTING CLOCK ERRORS.
161
tar's Name.
S I
.i
- =
Observed
Transit.
ill
3 B.SC
-5*53
Star's Name.
I p
1 10
Observed
Transit.
1898 October 23.
1 6 Pegasi ; Ej 9 12-360
9
17 Pegasi.
18 Pegasi
a Aqiiiirii
i Pegasi
6 Pegasi
8 Aquarii
Bradley 2993.
T Pegasi
K Piscium
Bradley 3147....
i Andromeda. .
78 Pegasi
19 Piscium
22 Piscium...
5 , ..
9i ..
9 .
9 >
7 | 12-360
9
ii
3 12*360
9
9
9
21. 48. 26-13
21. 51. 59-05
21.55. 3 '4'
22. O. 34"II
22. 2. 1 6 '67
22. 5- 4'55
22. II. 28 '71
2579
5873
3'10
33-8
16-33
4-24
28 '40
2876
1-69
6 '05
3671
19-41
7''9
31-27
22. 21. 26-99 | 25-69 , 28*99
23. 15. 36-68
23. 21. 43-98
2 3 . 28. 2-53
23.33. 978
23- 38- 53'4
23. 41. 12-64
23. 46. 46-41
36-42
4374
1-50
9-50
53'4
12-40
46-17
39'5
46'57
3''4
12*39
55^6
15-06
48-93
1898 October 28.
a Aquarii W 8 12-360
44 Piseium W 5
Polaris... .. W 10
Polaris
7) Piscium . .
a. Arietis....
1 5 Arietis .
-Ceti
9 Arietis...
Arietis.. .
J 2 Ceii.
\\
22. O. 40-88 39'75 36*65
o. 20. 19*23 i 18*14 14-93
14-056 I. 22. 13-47 ; 58-93 2-55
1898 October 30.
61 Cygni E
7 Equulei E
C Cygni K
a Equmei E
30 Capricorn! E
i Pegasi E
Groombridge 3548 K
Aquarii E
17 Pegasi W
18 Pegasi I W
a Aquarii | W
1 1'egasi i W
o Pegasi \V
6 Aquarii \V
y Aquarii W
Bradley 2993 W
17 Aquarii W
7) Pegasi W
\Pc-gasi W
70 Aquarii j W
,u Pegasi-. W
/3 Pegasi E
1898 October 31.
32 Vulpeculae E
16 Delphini E
33 Vulpeculie | E
9 Capricorni | E
y Equulei E
fCygni E
oEquulei j E
30 Capricorni ! E
Groorobridge 3548 E
3 Aquarii K
w'-Cvgni W
1 6 IVy-isi W
12-068
12-360
12-360
12-360
13-054
I. 22. 22-I9
1. 26. 9-98
2- L33-95
5 . 6-89
7.44-20
3572
29-54
2. 22. 52-94
2.
2.
2. 12
2. I 9 ,
9"l6
33-29
6*14
43'25
28*62
5 '"97
2. 26-10 25-92
5. 30-52' 29-71
8. 42*46 42*06
10. 5 1 "29 50*40
12. 22*86
1 7. 29-49
'9- 33'37
12*360 2 1 . 26. 19*62
21-55
28*87
49*56
18-54
12*360
21.52.
21.55.
22. O.
22. 2.
22. 5.
22. II.
22. 1 6.
22. 21.
22. 30.
22. 38.
22. 41.
22'. 43.
22. 45.
5-84
10*29
41-10
23-31
II'47
35'82
31-81
18*57
15*42
20*86
44*96
17-09
12*71
oj
4'
10
7
5
61
79
'12
42 j
'43 ,
'39 !
9 i
16
22*44
26*29
38*69
47-07
17*96
25-47
47-16
15-23
'59
5*96
36*62
19*31
7-10
31-18
27*29
27-38
10-97
16*99
40-94
12*47
8*68
12-360 22.58. 57-59 57-141 53*74
12-360
14-772
12-360
12-360
20. 50. 19-64
20. 50. 54-26
20. 53. 50*00
21. O. 21 '70
21. 5. 3075
21. 8. 42*64
21. 1O. 51*59
21. 12. 23-11
21. ig. 32*16
21. 26. 19*92
21-43* 771
21. 48. 32*82
19*20
5 3 '44
49*41
20*23
29*88
42 26
50-61
21 '63
51*96
18*71
7'99
15*63
49-83
45*89
16-80
26-28
38-67
47-06
18-16
46-80
15-22
4-32
28-64
Killorglin.
2 '55
6-28
30-42
3'33
40-37
32-11
2-97
2-96
2*95
2-90
ro8
= '95
2-87
3'3
3-08
2-83
1*64
2*89
2*82
2-66
2-76
3-10
3-21
+ 3-62
2*88
2*87
2'8l
2'88
2-87
2-84
2-40
2-41
2-41
2-38
2*46
2-41
2*89
2-67
2-77
273 |
2-58,
2-70
co Piscium
29 Piscium
33 Piscium
4 Ceti
7 Pegasi
Bradley 1672 S.P.
Piazzi 0. 60
10 Ceti
51 Piscium
e Andromeda. ...
70 Piscium.
( Piscium...
33 Ceti
Piscium..
/Piscium...
Greenwich.
3
2-87
2*85
2-79
1*86
2*85
2-82
48-92 3-05 i 3-03
27 Arietis i W
31 Arietis W
8 Ceti W
H Arietis : W
M Ceti W
o Tauri E
{Tauri K
/Tauri E
Piazzi III. 8; E
9 Taui-i j K
Piazzi III. 103 E
Greenwich.
- 3-48 i -
3'37
V33
3'59
3'4
2*40
3*31
3-48
3 '47
3-48
3 '5
3 '5
2*74
3H5
3 '44
3-45
3 '43
3 '4
3'57
3-6,
3'52
3 '43
3 "60
3 '59
3'55
3'47
5*16
3-49
3*67
3-66
3'45
3 '40 |
3*62
3^3
3'34
- 348
3'47
3'49
- 3'5
3-52
- 3-46
3'45
- 3-46
3 "44
3'4i
a Pegasi E
58 Pegasi | E
Pegasi .
K Piscium
Bradley 3147
27 Piscium
29 Piscium
33 Piscium ,
y Pegasi
Bradley 1672 S.P.
Bradley 1672 S.P.
58 Piscium
5 Piscium
20 Ceti
2 Ursae Minoris
17 Ceti
33 Ceti
r Piscium
f 1 Piscium
/Piscium
Polaris
Polaris .
Greenwich.
3'59
- 3-63
3*54
3'45
- 3*62
- 3*61
3-57
3-51
3' 6 9
3-68
17 Pegasi
18 Pegasi
a Aquarii
i Pegasi
6 Pegasi
Bradley 2993.
a Aquarii
i) Aquarii
A. Pegasi
u Pegasi
A Aquarii
Bradley 3147.
i Piscium
Groombridge 2283 S.P E 10
12-360
12-566
12-360
12-360
12-586
12-360
12-488
12-360
11-286
12-360
12-360
11*393
12-360
12-360
11-523
12-360
13-209
13-201
12-360
h m a
23- 54- 6-33
23- 5 5 - 3772
o. o. 8 "96
O. 2. 3270
o. 8. i -05
o- '3- 4779
o. 19. 19*16
O. 21. 25-77
O. 27. IO-25
o. 33. 12-27
o. 56. 51*30
0. 57. 41-78
1. 5. 2I"28
i. 8. 15-50
I. 12. 34-94
2. 25. 2372
2. 31. 12*98
2. 34. 24*00
2. 36. 45*72
2. 39. 34-48
3- 9* 34'84
3. 19. 27*94
3.21.47-06
3- 25- 23*05
3.28.28-35
3'
3. 33. 48-20
22. 59.
23. 5.
2 3 . 20.
23.21.
23. 2 7 .
23- 53-
23. 56.
o. o.
o. 8.
o. 14.
o. 14.
o. 41.
0.43.
o. 47.
0. 54.
1. 3.
I:!:
i. 8.
I. 12.
I. 22.
48*95
1-63
25-42
50-85
49 "oo
36*02
4474
15-78
7'53
32-94
2975
51 "02
5677
59-98
36-84
27-68
11*41
33-18
41-36
23*66
I. 22. 23-8
21. 52.
21. 55.
22. O.
22. 2.
22. 5 .
22. 21.
22. 25.
22. 30.
22. 41.
22. 45.
22. 47.
2 3 . 2 7 .
23- 34-
6-07
10*64
41-42
23-49
11-73
16*96
24*08
'573
45-16
12-86
2677
45'95
51-12
6*09
3 7 '49
873
32-46
0-80
49-04
18-92
25'53
lO'OI
1 2 '01
50-98
41*46
20*97
15*17
34*63
22-92
12*08
22*88
46-98
33'54
8-44
26-99
46-13
22-18
27-58
6*21
47-40
8-83
40*25
1 1 '36
35-04
3-46
51-66
21 '46
28-06
I2-52
I4-58
53*20
43'5 6
23*22
I7H3
36-86
19-89
9-06
19-94
4' '93
30'54
10*44
24*25
43*28
I9-39
24*79
3-3
44-57
48*24
0-81
24-87
49-89
5*88
34-97
4370
14-69
6'8i
5869
57'24
50-23
3 ''47
11-86
35-66
26-72
10*99
32-31
40-42
7'53
10-07
9*68
40-31
22-96
10*76
31 "26
22-74
14*63
44*58
12*31
25-50
57i
50-13
44-85
57H5
21-45
46-51
1-61
31-49
4O "2 1
H-32
3 '44
53*61
53-61
4676
27-98
52-27
8-85
3 2 '07
| 23-23
7-45
28-72
36-88
2-57
2'57
2-74
2-76
2-63
2-58
2-66
2-62
2-54
2'53
2-51
2-57
2 "22
2"IO
2-2|
2-26
3'3
3*02
2*94
3-05
3-00
-f- 2-00
2*74
- 2*85
z'79
2-79
2-91
- 2-83
3 '39
3'36
3*42
4-27
3>8
3 '49
3'37
3 '37
5*08
- 3 '47
3 '49
3-01
3 '59
3'49
3 '54
3'59 i
3 '54 '
4'9 6
7 '5
2-5
2*63
2*59
2*69
2-62
2-62
2-63
271
2 "46
2'35
2 '53
2'55
2'54
2 99
2-89
3-02
2-97
2-71
2-82
2-76
2*76
2-94
2*70
3*40
3-37
3'43
3 39
3'49
3'37
3 '37
3'47
rs3
3-53
i* 5 8 -
36*61
19-29
7*09
27*16
19*15
10*95
4 '9 3
8*66
21-83
1*40
3*65
373
3-70
3-67
3 '67
4-10
3-59
3*68
3-65
3-65
3*67
4'3-
3-60
- 3-67
3-74
3 '-i
- 5*68
3*68
3*60
3*66
3 66
3*68
3*60
162
TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH-KILLORGLIN, 1898.
Star's Name.
Observed
Transit.
-
'
ir
Sill
Star's Name.
<
'
Observed
Transit.
r
1898 October 31 continued.
20 Piseium
w Piseium
30 Piseium
33 Piseium
4 Ceti
Piazzi 0. I
y Pegasi
Bradley 16728.?.
15 Ceti
55 Piseium.
58 Pigciimi.
Piazzi 0. 18
1898 November 1.
a Equulei
30 Caprieorni
i Pegasi
Groombridge 3548.
Aqnarii
{ Aqnarii
d Aquarii
Pegasi
ir' 2 Cygni
16 Pegasi
a Aquarii
i Pegasi
6 Pegasi
6 Aquarii
y Aquarii
Bradley 2997.
1898 November 3.
30 Capricorn!
Groombridge 3548.
/3 Aqnurii ............
d Aquarii ............
e Pegasi ..............
a Aquarii .............
i Pegasi ...............
Pegasi ..............
Aquarii .............
y Aquarii ............
Bradley 2993 ...... .
a Aquarii ............
58 Aquarii ...........
i\ Aquarii ............
A Pegasi ....
70 Aqnarii .
p Pegasi....
X Aquarii ..
$ Pegasi....
a Pegasi ....
58 Peg.-isi...
<t> Aqnarii ..
y Piseium . .
if 3 Aquarii .
v Pegasi....
1898 November 4.
{ Aquarii i E
d Aquarii E
f Pegasi i E
18 Pegasi 'W
a Aquarii W
, Pegasi W
Pegasi i W
Hradley 2993.
T, Pegasi
X Pegasi
12*360
12-414
I2'3IO
12*360
9*811
12*360
12-360
5
9
9
9
10 i H'545
12*360
"'375
12-360
12-360
23.42. 51-14
2 3- 54- '3"4i
23. 56. 53-10
O. O. l6'Z2
O. 2. 39-92
o. 5. 14-96
o. 8. 7-87
o. 14. 39-27
o. 33- 74
o. 34. 42*06
o. 41. 51-13
o. 43. ii '07
49^7
12*45
51-87
14-99
377
'374
7*09
59H7
41-65
50-49
10*28
21. 8.
21. IO.
21. 12.
21. 17.
21. 19.
21. 26.
21. 32.
21. 34.
21. 39.
21.43.
21. 48.
51-83
2 3"3 2
29-94
32-23
20*14
28-25
3-"35
18*86
778
32*98
22. O. 41-36
22. 2.23*55
22. 5. II '78
22. II. 36*18
22. l6. 32-14
22. 21. 38*79
21. 12.
21. I 7 .
21. 19.
21. 26.
21. 34.
21. 39
22. O.
2 3"37
30*09
35-00
20*35
3i'47
19*09
42*40
| 50-82
I 21-79
! 29*26
26*95
30*27
"7'95
8*07
3 2 '45
40*24
23*02
10*80
34*90
31-00
54*00
21*94
29*39
5'-57
19*16
30*43
1019
22. 2.
22. 5.
22. II.
22. l6.
22. 21.
22. 2 5 .
22. 26.
22. 30.
22. 41.
22.43.
22. 45.
22. 47.
22. 58.
22. 59.
23. S .
23. 9 .
2 3 . 12.
23. 13.
23. 20.
7 J ~ J
41-78 40*69
12*14
36*5I
-8-34
2 4"44
26-43
i6'n
45 '59
17-82
'3 "35
27*13
58*31
4974
2-44
12-07
2-07
49-19
26*23
11*17
35-28
3 ' -4-*
30*81
2 3-'5
25*14
15*02
44 '99
16-55
12*77
25-92
57*82
48*96
''55
10-88
1*06
47-95
12-360 21.32.28-70127-48
21.34.31-79 30*76
,, 21.39.19*26 18*37
12-360 ' 21. 55. I I'27
,, ! 22. O. 42*08
! 22. 2. 24*29
J22. 5.12*50
9*390 ! 22. 21. 18*23
12*360 ! 22. 38. 21*84
,, '22.41.45*92
10-31
40-99
23-70
11*53
3'5S
21*36
45' 2 9
46*32
879
48*19
11*32
35-01
10*01
3 "43
56-11
38*00
46*76
6*58
38*65
47*04
18*13
-*5'44
46-42
15-20
23*23
26-45
14-17
4*29
28*63
36*60
19*28
7-07
31-16
27-27
51-13
18-11
25-41
45*62
15-18
26-42
14*15
3<5"57
19-25
7-05
31*13
27*24
26*40
19*12
21 *OI
10*92
40*90
I2*42
8-63
21*79
537
44*81
57"4i
6-66
56-89 '
21*41 '
23*19
26*41
14-13
5-89
36-56
19*24
7*04
26*12
16-92
40-88
4-09
4-I3
4-14
4'-3
4-12
4-I5
4-14
4-22
4''7
4' 2 7
4*22
4*29
4'35
4*24
4-42
4 "43
4-46
4 '49
4'43
4 '44
4*41
Greenwich.
3-65
3*66
3*68
3*67
3*76
373
3*66
5*58
37 2
3-65
373
37
375
3*78
3*66
3*82
5''3
3*69
3-72
3*82
3*78
3-78
3-82
3*64
374
373
374
373
2*87
3-S3
3*98
5-95
3*98
4*01
4-04
4-12
4-12
4*12
4-15
4*18
4-41
4-03
3*65
3*66
3-68
3*67
3-76
373
3-66
37 2 !
3-65
3'73 !
37 .
v Andromedse
20 Ceti
2 Ursa; Minoris.
26 Ceti
77 Piseium
e Piseium
33 Ceti
f 1 Piseium
/Piseium
Polaris....
Polaris.
Greenwich.
3 77
3-80
3-68
3-84
37 1
374
3*84
3-80
3*80
3*65
375
374
375
374
a Aquarii
58 Aquarii ....
f Pegasi
\ Pegasi
70 Aqnarii . . . .
Pegasi
a Pegasi
58 Pegasi
Aquarii
y Piseium
j/ 3 Aquarii ....
Bradley 3147.
21 Piscium ....
22 Piscium ...
a Piscinm
29 Piscium ....
Greenwich,
4 M o
Greenwich.
4'3-
4-37
4-26
4'44
4>5
4*48
4'5-
4'45
4*42
E
E
B
E
E i
E
E
K
E
E
12-310
13*164
12*360
1 1 -422
W 10 11*966
o. 44. 19
o. 47. 56
o. 54. 56
0. 58. 43
1. o. 41
i. 3.16
i. 5.27
i. 8.33
I. 12. 41
I. 22. 8
71 I
I9*92
56-04
I n-68
i 42-30
40*90
15*21
26-94
32-49
40'6i
4-41
1.22. H*32| 5*30
12*360
12*360
10*184
12-360
22. 25. 24-19
22. 26. 26*13
22. 36. 30-97
22. 41. 45*18
22. 43. 17-57
22. 58.
22. 59.
2 3 . 5.
2 3- 9-
23. 12.
2 3- '3-
23. 27.
23. 44.
23. 46.
23. 54.
23. 56.
57^7
49*38
2*14
1 1 "69
'74
48*83
44H5
2 3'39
5376
13*60
45*28
22-84
24-78
30-09
44-61
l6'22
57-40
48*59
I "22
10-43
0-68
47^9
4-59
22-29
52*69
12*62
44*09
16*26
52*26
8*81
38-65
37*20
"'55
23-23
28-72
36-88
2 '55
2 '55
19*14
, 2I " 3
26*42
40*92
12-44
53'7 2
44-83
57-43
6*67
56*90
43-68
1-16
18-47
48-87
8-78
40*20
3*66
- 378 -
- 2-S 7
- 3-65
3-70 :
377
3'73
1*86
- 2 '75
3-70
375
3' 6 9
378
3-68
3-76
379
3-76
378
3-8,
3'43
3-82
3*82
3*84
3-89
5*86
K Piscium
Bradley 3147
a Andromeda?
Pitizzi 0. I.
Pi;izzi 0. 33
Bradley 1672 S.P
4*I4
12 Ceti
4'I4
5 Piscium
z Ursae Minoris ..
Piscium
e Piscium
4*11
T Piscium
C 1 Pisoium
Polaris
4-15
4-I3
Polaris . .
4-18
o Piscium ...
A'28
4'*3
E 9 12*360 23. 21. 51*74 I 50*69 | 46*48 4-21
E 10 11-849 23.27.47*47' 5*63 0-62 501
E 9 12*360 o. o. 16*54 1 15*36 ii '30 4-06
E 9| ,, o. 3.15-89 15-42 11-34 4-08
E 9 ., i o- 5- '5"35 H'18 9*994-19
E; 9| I O. 12. 43-15 42*11 37*80 4-31
E 10 10*794 0.14.38*29 1*43 54*99 6*44
E 9 12*360 0.24.59-87 58*72154-51 4*21
\V
\V
W
W
W
W
W
W|
W
12-360
13*676
12*360
14*352
0.43.33*12 32*18 27-97
o. 55. o'oi 12*84 8*62
o. 57. 48-66 ' 47*72 j 43*57
i. 3. 16*77
4. 10*83
i.
6. 12*11
8. 34*01
I. 12. 42-13
I. 22. I7*42
E i 16 11*870 i. 22. 13*94
W
1 1 616
12*360
I. 22. 20'22
I. 34. 20 46
I. 36. 17*28
I. 40. IO*3I
I. 49. 1O*12
'579
10*51
11*65
33"7
41*11
4*81
37 2
7-61
19*69
16*30
9*40
9 '44
11*55
6*25
7 '44
28*72
36-89
2*13
4-21
4-22
4*24
4*26
4-21
4'35
4-22
2*68
2*13 1*59
2-13
-5'45
12*09
5*18
5 '-7
5*48
4*24
4*21
4-22
4''7
3*65
377
3*64
3*69
3*65
3-70
376
3-72
37i
3*76
3*68
3-70
379
3' 6 9
377
3-80
3-68
379
3-82
'3-82
3*82
3*84
3-89
4'22
4"o6
4-08
4-19
- 4-21
4*20
- 4*14
- 4' 2 3
4-25
4-20
4-34
4*21
4*22
4*I 9
4*20
4'-5
M Pegasi
3 Pegasi
a Pegasi E
58 Pegasi E
Aquarii E
y Piscium E
ip Aquani E
v Pegasi E
K Pisciuin E
12*360 : 22. 45. 13*68 ! 13*07 ; 8*62 I 4-45 4*46
12*360
22. 58. 58*47 57*96 53*68
22. 59. 49*82
2 3 . 5. 2-63
23. 9. 12-25
23. 12. 2-25
23. 13.49-36
23. 2O. 26*41
23. 21. 51-93
49*03
'"74
1 1 '06
1*23
48*10
-579
50*88
44*80
57-40
6*65
56-88
43*66
21 -40
46-47
4*28
4'34
4-41
4'35
4'44
4"39
4 "4 1
4-29
4*24
4^5
4*42
4-36
4'45
4-40
4*42
October 31. The R.A. micrometer was inadvertently left at reading 12*310 from 15 Ceti to 20 Ceti.
STAR-TRANSITS OBSERVED BY MR DYSON WITH TRANSIT D., AND RESULTING CLOCK ERRORS.
163
Star's Name.
, I
+* **
9 iS
&
",
5
Observed
Transit.
Star's Name.
** S
W2
Observed
Transit.
g g is" -S I 5
5 I* B|||
1898 November 5.
Greenwich.
t Pegasi
1 6 Pegasi
17 Pegasi
18 Pegasi
a Aquarii
i Pegasi
fl Pegasi
8 Aquarii
7 Aquarii
Bradley 2993.
a Aquarii
58 Aquarii ....
T) Pegasi
\ Pegasi
70 Aquarii ...
H Pegasi
\ Aquarii
o Pegasi
58 Pegasi
Aquarii.... .
7 Piscium
ijr Aquarii ....
<j- :! Aquarii
u Pfgasi
K Piscium
Bradley 3147.
1 Piscium
11-408
12*360
21. 39. 19-54
21. 48. 3374
21. 52. 7'00
21. 55. II'44
22. O. 42'2S
21. 2.24-39
22. 5. I2"6o
22. II. 36-95
22. l6. 32-88
22. 21. 18-43
22. 25. 24-83
22. 26. 2675
I2'360 I 22. 38.
22.41.
22. 43.
22. 45.
22. 47,
22. 59.
2 3- 5-
23. 9,
,, 23. 12.
23. 12.
,, 23. 13
23. 20.
123.21,
I2-IO7 23. 27.
12-360 23. 34.
2I'8l
45-86
18-21
13-67
27 '54
50-06
2-80
I 2 '34
2 '43
46-31
49-50
26-56
52-14
46-20
5 2 '00
18-67
33-20
6*17
10-51
41-22
23-83
n -66
3575
31-80
30-68
23-58
2 5'49
21-38
45-28
16-97
13-11
26-36
49'3*
1-94
11-18
''45
45-10
48-28
25-98
51-12
4-05
51-06
14-12
28-56
1-51
5-88
3 6 '55
19-22
7-02
31-11
27-22
25-83
19-09
20-98
16-91
40-87
12-40
8'6o
21-77
4479
57'39
6-64
56-87
40-47
43' 6 5
21-39
46-46
o'oi
46-49
4'55
4-64
4-66
4-63
4-67
4-61
4-64
4-64
4-58
4-85
4 '49
4-51
4 "47
4-41
4 - 57
4-51
4'59
4-52
4'55
4 54
4-58
4-63
4-63
4^9
4-66
4-04
4'57
4 -c6
4'6c
19 Piscium
4.'&7
4'64
29 Piscium
4'68
Piazzi 0. I
4"6o
y Pegasi .
4 '6z
4-65
55 Piscium
58 Piscium
4'CO
4'C2
20 Ceti
2 Ursae Miuoris
4*42
37 Ceti ...
4'58
T Piscium fc
4'5 2
* Piscium
4*60
f Piscium
4*C?
Polaris.,
4'55
4-58
4 "6 1
Polaris
4*67
77 Piscium
4'CQ
TT Piscium
4*66
105 Piscium
v Piscium
4'<7
o Piscium ..
12-360
9
4
9
9
9
9
4, 12-360
9
9
9
9
9
9
5
9
9j
9 14*281
10
11-449
12-392
12-360
23. 39. 0*92
23. 41. 20*68
23. 54. 14*18
23.56.45-88
o. 5. 15*86
o. 8. 8*66
o. 12. 43*53
- 34- 43 ' 2 4
o. 41. 52*27
o. 43. 33*58
57'9 6
0*14
17*20
0.47.
0. 55.
1. 3.
i. 5. 28*98
i. 6. 12*63
i. 12. 42*49
I. 22. 18*04
I. 22. 19*28
I. 22. 20-64
I. 26. 11*76
I. 31. 5173
I. 34. 20-90
I. 36. 1774
I. 40. 10-75
0-47
19-70
13-27
4479
14*72
7-91
42*52
42'6o
5 1 '44
32-67
56-88
12-75
16-25
2 7'97
I2'l8
33'4
41-50
4-58
7-18
10*99
50*91
20*15
16*79
987
8
55-86
14*98
875
40-18
9'98
3 '4'
3779
37'99
4*75
2 7'97
52*25
8*40
n*S5
23*23
7 '45
28-72
36-89
1*56
8*21 1*56
1*56
6*30
46*24
15-46
12*10
5 *l8
4*61
472
4'5 2
4*61
474
4'5
473
4'6i
4' 6 9
4-70
-4*63
4'35
47
474
473
- 476
- 4-6,
3*02
6*65
- 5*62
4'69
4 '67
4 '69
4-69
4' 6 9
4*61
472
4'5 2
4"6i
474
4*50
473
4*61
4*69
4*70
4-63
473
473
472
475
4*60
4-68
4*66
4*68
4-68
4-68
1898 November 6.
e Pegasi j E
16 Pegasi I E
17 Pegasi K
18 Pegasi | E
i Pegasi ? j E
6 Pi-gaai E
e Aquarii E
Bradley 2993 \ E
a Aquarii ' E
58 Aquarii E
TJ Aquarii E
C Pegasi
Greenwich.
o Andromeda W
(8 Pegasi | W
58 Pegasi W
<p Aquai-ii ' W
1898 November 10.
a Equulei j E
Groonibridge 3548 E
ft Aquarii E
-r-Cygi-i W
16 Pegasi vV
18 Pegasi W
i Pegasi W
( Ce-ihei W
6 Aquarii \V
7 Aquarii | W
Bradley 2993 W
a Aqiiarii W
A Pcgasi...
/a, pegM
A Aijuarii .
E
E
K
E
E
E
E
E
E
E
Pi-dura | E
Bradley 3147 \ K
i Andromedse.... . E
o Pegasi ....
58 Pegasi...
Aquarii ..
J/" Aquarii .
t^- 1 Aquarii .
v Pegasi .
12*360 21. 39.
21. 48.
21. 5 2.
21. 55.
22. 2.
22. 5.
22. II.
I2-282 22. 21.
12-360 ' 22. 25.
22. 26.
22. 30.
22. 36.
12-360 i 22. 57.
i 22. 5 8.
.> *3- 5-
23. 9.
19-58
33-80
7*00
11*55
24 '44
12*66
37*10
15-57
25-06
27-04
16*70
31*90
22*29
58-83
3*04
12-67
12-360
12-592
12*360
12*360
12-900
12-360
12-360
12-129
12-360
21. 10. 52*73
21. I 9 . 37-48
21. 26. 20-96
21.43. 9'3
ii. 48. 34-11
2i: 55. 11*79
22. 2. 24*76
22. 7. 26*45
22. ii. 37*01
22. 16. 33*18
22. 21. 21*44
22. 25.25-13
22. 41.
22.45.
22. 47.
22. 58.
22. 59 .
23- 5-
23. 9 .
2 3 . 12.
2 3 . 13.
23. 2O.
23.21.
23.27.
2 3- 33-
46-40
14-11
27-78
59-10
5'47
3*18
12*67
46-52
4974
27*03
52-40
53''7
17-46
1 8*60
33"'9
6-07
10*51
23*82
11*61
3576
29*96
23*66
2 5' 6 3
15*52
30*94
22*15
58*26
2*05
11*35
52*26
49*00
20*36
9'54
33*89
11-32
24-54
26-98
36-36
32*61
29*51
2 4'45
46*17
13*89
27*15
58*94
50*12
2*76
12*06
45-87
49*08
26*79
51-88
5''7
17*58
14-10
28*55
1-50
5-87
19*20
7*01
31*09
2 5'54
19*08
20*97
10*88
26*36
'7 '49
53*66
57'38
6*63
46*92
4 2 77
15-08
4*06
28*48
5*81
19*14
21*56
31*04
27*15
24'45
19*03
40*80
8*54
21*71
53*61
4473
57'34
6-59
40*42
43*60
21*34
46*40
58*49
12*17
4*50
4-64
4-57
4-64
4-62
4*60
4*67
4*42
4-58
4*66
4*64
4*58
4*66
4*60
4*67
47 2
5'34
- 6*23
- 5*28
5*48
- 5'4-
- 5-5i
5 '4
5-42
- 5-32
- 5 '4-5
5 "06
5'42
5'37
- 5-35
5H4
- 5'33
5-39
5'4 2
5'47
5H5
- 5-4S
5 - 45
- 5-48
6*68
5*41
4'S 1
4*65
4*58
4-65
4-63
4-61
4-68
4'59
4-67
4-65
4-59
4*66
4-60
4*67
4'7 2
i|r Aquarii
ip Aquarii
u Pegasi
K Piscium
Bradley 3147
22 Piscium
27 Piscium
30 Piscium
33 Piscium
5 Geti
Piazzi 0. I
y Pegasi
Biadiey 1672 S.P..
/ Piscium..
Polaris
P Piscium .
Greenwich.
5-37
5*30
- 5*50
- 5-43
5-53
- 5 "42
5'44
5-34
- 5-38
- 5-36
5-45
5'34
5'4
5-43
- 5-4*
- 5-46
5 '49
5*46
5'49
- 5'4i
i Piscium
20 Piscium
21 Piscium
22 Piscium
27 Piscium
33 Piscium
5 Ceti
Piazzi 0. I
7 Pegasi
Bradley 1672 S.P.
. E
. E
. E
S Piscium
20 Ceti
2 Ursse Minoris.
e Piscium
77 Piscium ,
-7 Ceti
33 Ceti
T Piscium
f 1 Piscium
Polaris....
E
E
B
E
. W
. W
. W
. w
. w
. w
. w
w
. w
.: w
Polaris.... E
Polaris
T- Piscium .
w
\v
12*360
13*090
12*360
13*789
12*360
10*048
12*360
12*360
11*126
12*360
ii
13*072
12*360
14*262
11*520
12*282
12*360
46*43
49-75
2675
52*28
45*68
23. 12.
2 3- '3-
23. 20.
23.21.
23. 27.
23. 46.
23- 53-
23. 56.
o. o.
o. 3.
o. 5.
o. 8. 8-84
0. 14. 41*22
1. 12. 42-58
I. 22. 12*79
I. 25. 0*74
54*10
17*20
9*00
'5'95
45*04
48-35
26*06
51*11
4*72
53'44
36*09
52*78
15*89
7*76
14*65
7 '97
2-52
4" '47
7*42
59*69
o.
o.
o.
o. 14. 25*89
0.43. 33*83
o. 47. 58-21
0. 55. 4*29
<- 57- 49 '34
o. 43*11
3- 38-25
5. 29*16
6. 12*99
8. 34*71
1. 22. 30*07
23-83
54*29
36*90
16*69
8*63
15*51
877
2*86
33-37
57^5
12*59
48-89
42-62
37'57
28-64
12-84
34' 2 5
'33
i. 22. 33*84, 6-49
I. 22. 34*15 4-41
I. 26. 12*03 11*67
23. 34. 52*28 5I-8l
23. 42. 52*23 [ 51*66
23. 44. 24*35
23. 46. 54*79
2 3- 53- 37-48
o. o. 17-30
3. 9*21
5. 16*11
8. 9*12
40*46
43 ' 6 4
21*38
46-45
59*69
48*84
31*38
48-15
11-28
3'-4
9 '97
3'4"
56*38
36*89
1*23
55''5
46-44
46*24
18*40
48*8 1
31*42
11*25
3*11
9'94
P 8
58*19
2 7'95
52*24
7*72
43'5 6
37*19
32*05
23*22
7 '44
28*7,
59*86
59*86
59*86
6*30
4*58
47'
4-68
4*66
5*03
4*60
47i
4-63
4*61
4*62
4*68
4*56
6*14
4-58
6-19
4 - 54
- 5'37
5'42
5'43
- 5-48
- 5-48
5 "44
- 5'5*
5'57
5 '39
- 4-67
SH 2
5'4-
- 4-87
5'33
5 "43
5'5 2
5'4 2
5'4
5'54
'47
- 6*63
4-55
5'37
4-58
47"
4*68
4*66
4-60
47*
4-63
4 "61
4*62
4*68
4*56
4*58
4'53
5'37
5 '42
5 '43
5 '4
5-48
5 '44
5'5 2
5'57
5 '39
5'4'
5*40
5 '42
5'5-
5'4'
5-39
5-53
- 5-36
164
TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH-KILLORGLIN, 1898.
Star's Name.
Observed
Transit.
Ii
Ii
SH
Star's Name.
Observed
Transit.
.3 S
.3
E
ft
<i
'g-os
J^S 00
1898 November 12.
Greenwich.
Pegasi
Pegasi
Pegasi
12*360
22. 45. 14-63
22. 58. 59*51
22. 59. 50*90-
>4'45
59'39
5'59
8-51
53-53
447'
5 '94
5-81
5-88
5'95
5-82
5-89
a Andromeda;..
Andromedse. .
r Piscium
Polaris...
W 4
W| 9
W ! 9
W 5
12-360 I
16-666
1] 111 8
0. 3. 17-32
1. 4. 12-05
i. 6. 13-42
I. 22. 34-14
I7*I9
I2*03
I3'3i
5 -2 7
11*27
6*23
7 '44
5-92
5*80
- 5 87
5-89
5-92
579
5-86
1898 November 13.
Greenwich.
s Pegasi
Cephei
7 Aquarii
3 Lacertse
Bradley 2993.
TJ Aqnarii
Pegasi
7| Pegasi
o Andromeda;.
6 Pegasi
a Pegasi
58 Pegasi
Aquarii
7 Piseium
j< 2 Aquarii
i|i 3 Aquarii
v Pegasi
7 Pegasi
Bradley 3147..
18 Pegasi
a Aquarii
i Pegasi
8 Pegasi
Aquarii
7 Aquarii
Bradley 2993
<r Aquarii
( IVgasi
i) Pegasi
\ Piasi
a Aquarii
i Pcgasi
9 1'egasi
7 Aquarii
Bradley 2993.
Bradley 2993.
Pegasi
n Pegasi
\ Pegasi
H Pe;;asi
\ Aqvmrii
B Pegasi
a. Pegusi
7 Piscium
r Pegasi
K Pisi ium
Bradley 3147.
i Andromeda .
i Piscinm
22 Piscium....
33 Pisoiuiu . . . .
7
9
9
9
4
9
9
q
1398 November 16.
<t> Aquarii E
1898 November 17.
12*360
11-265
12*360
22. 5. 36*75
22. 7. 26-64
22. l6. 33'9I
22. 19. 41*67 ' 42'I2
22. 21. 19*28 29-93
22. 30. 17*40 i 16*7!
22. 36. 32*76 : 32*24
22. 38. 22'97 [ 22'8o
36*64
27-36
33-20
12-360 22. 57. 23-11
.. 22 - 59- 59'6o
22. 59. 50-97
.. , 2 3- 5* 377
23. 9. 13-32
,, 23. 12. 3-42
123.12.47-17
i 2 3- 13- 5o'4i
,23.20.27-66
,, 23. 24. 10*28
12*540 23. 27. 48-29
12-360
12-622
12*360
12*360
12*360
'3 '479
15*104
12*360
12-360
10*612
22. 5 .
22. II
22. l6
22. 21
21. 55. 13*32
22. O. 43'85
22. 2. 26-63
14-42
38-40
34-60
34-18
22. 25. 26-55
22. 36. 34-05
22. 38. 24-60
22, 41. 48 '54
23. 9 . 14-25
22. O. 49'7O
22. 2.32-35
22. 5. 20 'l8
22. l6. 40-34
22. 21. 39*59
22. 21. 37*28
22. 36. 39*57
22. 38. 30*02
22.41. 53*94
22. 45. 21 *68
22. 47. 34-68
22. 59. 6'8i
22. 59. 57-88
12. IO-26
I 5 . 52-85
23.
23.
2 3 . 21. 59*85
23. 28. 13-13
23. 33.25*91
23. 35. 0*04
23.47. 2-36
o. o. 25*02
23-26
59'4>
50-54
3' 2 5
12-54
2-80
46-35
49-58
27*38
9-81
3*84
'4'59
45 -I 5
27-78
.5-69
3974
35 9'
30-44
27 '91
35-29
15-72
49-70
15-70
50*90
33-47
21*37
4I-55
37-67
37'45
40*87
31-27
55-21
22-94
36-03
8-07
59 -I 7
11*46
53-98
1-05
io'o6
26-94
1*23
3-56
26*20
30-65
21-47
27-11
35-86
23-71
io'8o
26-28
1679
17-52
53'57
447
57'3
6'55
5679
40-38
43"56
21-30
3-84
5772
573
36-40
19-05
6-89
30-96
27-07
22-90
18-95
26*24
16-75
40-72
36-39
19-04
6-88
27*06
22 '60
22'6o
26 23
16-73
40-71
8-44
21-63
53'5 2
44-65
5 6 75
39'24
46-33
56-51
1 2*06
46-45
4875
11*19
5^9
- 5'89
6*09
6*26
6*22
5-91
5'96
6*O I
574
- 5 - 84
- 5'84
5^9
6*01
- 5'97
6 "02
6-08
6-12
6'oo
5-90
6-10
6-27
5 '97
6 '02
575
5-85
5-85
5 '95
5 "99
6"oi
5 '97
6-02
6-08
5 '97
ID Piscium
30 Piscium
33 Piscium
a Audromedse
7 Pegasi
Bradley 1672 S.P.
51 Piscium
a Cassiopeise
c;8 Piscium
Piazzi 0. 189
7 Andromeda;
20 Ceti
2 Ursa; Minoris...,
/ Piscium ,
Polaris...
Polaris
/j. Piscium .
T; Piscium .
Killorglin.
8-86
S3 1
8-80
8-78
8-84
7'54
8-96
9-05
8*97
8-98
9'33
9 "20
9-17
9' 2 3
9-19
9-23
9'37
9-28
9-28
7 Piscium
Piazzi 0. 33
58 Piscium
S Piscinm
2 Urste Minoiis.
73 Piscium
j3 Andromeda;...
T Piscium
Polaris
Polaris.
- Piscium .
6-52 9-181 9-37 105 Piscium |W
Killorglin.
-14-51
-'4'43
-14-49
-14-49
-15-07
-14-85
-14-64
-14-54
-14-50
-14-50
-14-40
->4'55
-14-52
-14-71
-'474
-'473
-13-55
-14-88
-14-78
-14-81
-15-01
-14-96
-14-87
-14-92
-14-88
-14-96
-14-85
-14-79
-14-78
-14-67
-14-78
-1475
-14-89
-14-91
-14-86
-14-98
-14-87
-14-86
-15-01
4 Ceti
7 Pegasi
Bradley 1672 S.P
51 Piscium
14 Ceti
e Andromeda
20 Ceti E
Andromeda;.
2 Ursa; Minoris
i Piscium
73 Piscium
e Piscium
T Piscium
Piscium
/Piscium
Ceti
Polaris....
Polaris
o Piscium .
54 Ceti
K
E
B
K
K
B
B
K
E
E
W
W
\v
12-360 J23. 54. 15-19
,, 23.56.54-73
o. o. 17-86
' - 3- '7'35
o. 8. 9-76
13-616 o. 14. 31-95
12*360 o. 27. 19*02
o-34- 53^9
0.41.53-31
,, 0.43.13*20
,, O. 44. 22"l6
,, o. 47. 58*96
0.55. I-I9
13*059
12*360
10-982
I. 12. 43-69
I. 22. 23*55
14*61
53^5
17-08
17-16
9*32
0*26
18*44
54*22
52*8l
12*59
22*24
58-25
12-15
43"7
12*456 i. 22. 23-68] 3*57
12*360 i. 25. 1*57 j 0*98
i. 26. 12*62 12*18
12-360
11*986
12*360
11-965
10*773
12*360
23. 12. 4'6o
0. 12. 46*00
o. 41. 55-02
o. 41. 36-15
o. 55. 19*69
0. 59. 48-47
1. 4. 14-64
i. 6. 15-90
i. 23. 20*64
i. 23. 22*82
i. 31. 54*91
' 34- 23*97
6"oi
47 '42
56-38
37'54
17-96
49-87
15-87
17*16
ii '21
56*17
25*18
io'6i2 I o. 2.48-70:49-89
o. 8. 17*02 18-18
14*275
12*360
12-360
o. 14. 9*07 ! 18*47
o. 27. 26-24 27-42
o. 30. 36-96 38-17
-33- 2 8-35 29-46
556
-360
11*991
11*097
12*360
o. 48. 6 r o6
o. 51. 4-22
o. 55- "75
o. 57. 57*44
0. 59. 53-96
' 3-25-39
1. 6. 21-31
i. 8.31*34
1. 12. 50*77
I. 19. 13-96
I. 23. 18-84
22-89
5875
55' 2 7
26-70
22-56
32-60
52*09
15-3,
16*17
8*69
48 09
11*22
II*26
3*36
59'33
I2H5
48-40
46-72
6*54
16*20
5 2 " 2 3
7'43
36-88
59'''7
59''7
55-'5
6*29
56-76
37-72
46*71
27-92
7-12
40*1 1
6-21
7 '43
46*24
15-46
3-33
I '22
12-42
23-06
14-49
52*21
10-35
6-97
43'54
40'10
II-52
7H2
17 '43
3687
0-08
5-86
5-86
5-90
5-96
'93
5 '99
- 5*82
6*09
6*05
6*04
6'02
472
6-19 :
6'66 j
4 '40
- 5-83
- 5'89
i. 23. 19-59 9*35 57-96
1.40. 19-39 20*57 5*19
1.45.46-28.47-45 31-99
- 9*25
- 970
- 9 -6 7
- 9-62
-10*84
- 9-76
- 9*66
- 973
-12*84
- 6*44
' 9'93
- 9-72
-15 oo
-14-85
-17*25
-15 *oo
-15-1 1
-'4 '97 !
-15-18
-15*09
-15-92
-15 *2I
-15-17
-15-18
-I5*1 4
-15-17
-15-22
-15*23
-I8-2I
-11-39
->5-38
- 1 5 '46
5-86
5-86
5-90
5-96
5'99
5-82
6*09
6-05
6-04
6 '02
6-18
5-82
5*8-
9'43
9*65
9-5i
'"53
9-41
9-41
9'59
9-36
-.4-99
-14-8
-14-90
- 1 5 -oo
-14-85
-15-00
-14-90
-14-99
-.4-94
-*4'95
-14-89
-14-91
-14*95
-14*93
-15-00
-15-06
STAR-TRANSITS OBSERVED BY MR DYSON WITH TRANSIT D., AND RESULTING CLOCK ERRORS.
1G5
Star's Name.
Ol)serve;l
Transit.
H -
l|q
H -
o ii a
S ce.2
w ftcc
&
?
Star's Name.
i
.
<s
42
Observed
Transit.
g
o
A
tQ .
IF
1898 November 18.
a Aquaiii W 9
i Pegasi W 5
Pegasi W 9
e Aquarii W 9
Bradley2993 W 10
Brailley 2993 E n
fPg*d E 4
r) Pegasi E 9
A Pfgasi E 9
M Peg-isi E 9
AAquaiii E 9
Pegiisi E 9
o Pegasi E 9
12*360
12-628
15-893
h ni a a
22. o. 54-85 56-01
22. 2.3772 38-82
22. 5.25-55 26-70
22. ii. 49 '61 50-78
22. 21. 43-44 42-30
22. 21.41 *OO
12-360 | 22. 36. 44-90
22.38.35-48
22. 41. 59-44
22. 45. 27-20
22. 47. 40-24
22. 58. I2'20
22.59. 3"36
12-360
v Pegasi W j 9
K Piscium WJ 9
Bradley 3147 ! W 10 10-617
Piscium W
78 Pegasi W
12-360
29 Piscium W 8
1898 November 21.
70 Aquarii ..................... I W
Pegasi
\ Aquarii
/9 Pegasi
a P.-gasi
58 Pegasi
y Pis ium
K Piscium
Bradley 3147
21 Piscium.
12-360
15*120
12-360
1898 November 26.
A Pegasi E 9 12-360
ji Pegasi E 9 ,,
u Andromeda; E 3 ,,
Pegasi E 9
a IVgasi E 8
58 Pegasi E 9 !
y Piseium K 9 ,,
T Pegasi E' 9 ,,
K Pisoium E 5
Bradley 3147 E 10 10-593
1898 November 27.
5 Piscium W j 9
20 Ceti , W 9
2 Ui-sie Minoris W 1 10
77 Piscium .....................
e Piscium .......................
33 Ceti
<t> Piscium
f Piscium
Polaris
Polaris ........
Piscium. ...
105 Piscium .
o Pis'-ium.
fCeti
E 10
E 9
E 9
E 9
E 9
E 4
23. 20. 40*29
23.22. 5-31
23. 28. i6'6i
2 3- 35- 5"53
23. 39. 14-78
23. 56. 59-11
4 2 -55
46-16
36-72
0-69
28-45
41-51
4 4i
41-40
6-46
14-62
6-68
15-87
0*27
36*38
19-03
6-87
30-94
22-29
i
22*29
26*22
16-72
40-69
8*43
21*62
53-5
44*64
21*25
46*33
56-14
46-37
5573
40-07
19-63
19-79
-19-83
-19-84
20 "o i
i
20-26 i
19-94 j
20'OO
2O'OO j
2O'O2
19-89
'9'94
19*98
20*1 C
J
20*13
18-38
-20*3,
20*14
2O'2O
22.43-
22. 45.
22.47.
22. 59.
13. o.
2 3- 5
2 3 . 12.
23. 22.
23. 28.
46-56
42-82
55'89
27 86
18-98
31 "62
31-15
20-71
31-19
47-97
44-21
57-29
29-25
20-38
33-03
32-56
22*12
12'20
8-38
21-58
53^6
44-61
57-21
5671
46-30
55-01
-3577
35-7I
3579
-35*82
-35*82
36*05
22.42.
22. 46.
22. 58.
59.
23.22.
23.28.
42*69
10-47
19-17
46-71
59-46
58*92
4''37
48-49
55-21
12-33
21-04
I-32
0- 7 8
43' 2 3
5'35
57-94
40-58
8-3,
17-11
53'39
44-55
57-16
56-65
39-I3
46*25
23. 44. 52-761 54-29 I 18-30 35-99
-63-97
-64-02
-63-93
-64*09
-64*02
-64-16
-64-13
-64-10
-64-10
-64-49
12*360
9-815
12*360
14-620
1 1-089
12*360
o. 44. 36-45
0.49. 0-77
0. 56. 14-23
1. 1.4574
I. 4. 20 - l8
I. 5. 14-78
I. 6.31-86
I. 9. 26*02
1. 13.45-48
1.24. 3-91
1. 23. 53*82
1. 32. 54-89
' 35- 2 3'99
i. 37. 20-74
1.41. 13-79
i. 47. 38-66
38-06
2 '37
15-58
47-35
21-79
16-41
33'47
27-66
47-09
27-86
52-15
5' 2 5
37-11
11-47
6-15
23-15
17-38
36-82
52-92
1-89 52-92
56-64 j 46*21
2 574 | 15-44
22*48 i 12*08
1 5"53 5 -I 7
40-38 30-12
-70-20
-70-22
-70-33
-70-24
-70*32
-70*26
-70*32
-70-28
-70-27
-7 > "47
-68-97
-70-43
-70-30
-70-40
-70-36
-70-26
Killorglin.
-20*07
-20-22
-20*22
-20*24
-20*25
-20*30
-20-29
-20*30
-20*l6
-20*17
-20*20
-20-29
-20*27
-20*40
-2O"22
-20*21
33 Piscium
4 Ceti
y Pegasi
Piazzi 0. 33
Brailley 1672 S.P.
51 Piscium
14 Ceti
e Audromedse
20 Ceti
p Andromedae ...
2 Ursie Minoris.
t Piscium
33 Ceti
Piscium
/Piseium
Polaris
W. 7
\V 9
W, 9
Wj 9
W! 10
W 7
12-360
13-420
12-360
E ; 9 | 12-360
Polaris
TJ Piscium .
ir Piscium.
W 10
W 9
!W q
Killorglin.
-36-11
-35-98
-36-02
-36-00
-36-02
-36-03
-35-96
36-05
<f> Pegasi
ID Pisciura
33 Piscium
4Ceti
5 Ceti
y Pegasi
ttradley 1672 S.P
51 Piscium
14 Ceti
e Andromedse
12-360
12-178
12-360
Killorglin.
-64-37
-64-31
-64-18
-64"33
-64-26
-64-38
-64-32
-64-27
-64-25
Bradley 3147 : W
i Pisciuiu j W
78 i egasi W
19 Piscium ' W
20 Piscium I W
21 Piscium j W
<t> Pegasi W
29 PUeimn W
4 Ceti W
y Pegasi W
Killorglin.
13-450
12-360
11-097
12-471
12-360
10-846
-70-03
-70-03
-70-02
-70-08
-70*01
-70-07
-70-01
-79'99
-70-07
-69-93
-70-02
-69-97
-69-84
7 Arietis E 9 12*360
Arietis
27 Arietis
29 Arietis
v Ceti
JCeti
fn Arietis
47 Arietis W
t Arietis W
A Ceti I W
a Ceti... IW
J Arietis I W
Groombridge 2283 S.P W
oTauri..... JW
/Tauri W
4,
9 1 ..
9 ..
6
9
7 12*360
5
4
9
9
>3" 2 53
12*360
o. o. 30-27
O. 2. 53-99
O. 8. 22 '22
O. 12. 56*84
o. 14. 19-22
o. 27. 31-69
o. 3- 42*34
o- 33- 33-64
3 '"43
55'>5
23*46
57'99
26-47
32*83
43 '49
3473
o. 48. 11-31
o. 51. 29-53
26*62
30*72
42-46
12-59
30-76
27V
31-99
43'74
0-55
3
' 8.36-65 .
. 12. 56-14 57-42
. 23.23-54 23 82
. 23. 24-19 16-89
26.2575 26-88
32. 5-72 6-85
23- 47.
2 3- 54'
o. o
o. 3.
o. 3.
o. 8,
o. 14
o. 7
o. 30,
o-33
5 6 '47
43-09
45'5 2
9-36
37 '3'
3775
41-01
47-08
577"
48-97
23. 28. 57-62
23. 35. 4^ '9 8
23. 39. 58-14
23. 42. 17*42
23. 43. 48*66
23. 45. 20-86
23. 48. 24*58
23. 57. 4 2< 6i
o.' 3- 37^ '
o. 9. 5'8o
57-50
50-71
59-85
19-15
5-39
22 59
26-30
44'34
39-24
7'53
8
11-18 |
34-88 ,
3-32
377 s
12*42
23*06
14-48
52-20
10-34
6*81
11*5:
23*20
'7'43
36*86
57-46
6-29
46-24
58-01
44-62
47 '5
10-89
39-04
30-28
40-14
48-61
59" 2 4
50-51
22-05
8-62
11-15
34-85
3-02
3-29
3-69
12*39
23*03
'4'45
1.49. 9-43 "''9
2. 20. 34-61 36*35
2. 26. 28-59 3'34
2. 28. 32*66 I 34-41
2. 31. 44'8o i 4 6 '59
2. 35. 28*69 I 30-42
2. 37- 575 5 2 '49
2. 53. 29*28
2- 54- 37'iQ
2. 55- 28 "95
2. 58. 10-78
3- 7- 2 ' 2
3. 10. 1474
3- 2 o. 337'
3. 26. 28-82
30-91
3873
30'57
12-39
3-82
17-17
35^3
30-44
20-25
20-27
20*14
20-29
24*64
20*41
20*43
20*25
20-39
20*42
20*76
20*47
20*54
20*47
20*56
26*36
-19-43
-20-59
-20 -6 1
-20*25
-20-26
20-24
20-31
20-32
20*13
20*22
20*23
20*24
-20*30
-20*22
-20*29
-2O*27
-20*27
-35"96
-36-00
-35-90
-36-04
-36-02
-35'99
-36-45
-36-22
-36*21
-36-06
36-01
36-02
35-90
36-03
36-01
-35*96
-36-
36-10
35'94
53'45
46-29
55 -6 5
14-78
46-09
18-25
22'OD
40*00
34'S'
3-25
-64-05
-64-42
-64-20
64*52
64-28
_ 64-45
64-30 I 64-37
64-34 j 64-40
64-39
-64*36
-64-30
-64-34
-64-43
-64-28
64-42
64-25
0-94
25-92
20 "06
24-03
36*18
20'IO
42-I3
20-23
28-12
I9-97
1-82
53"'4
7-88
24-56
1973
-70-25
-70-43
-70-28
-70-38
-70-41
-70*32
-70-36
-70-68
-70-61
-70-60
-70-57
-70*68
-69-29
-70*77
-70*71
-69-83
-69-88
-69-71
-69*80
-69-82
-69-72
-6975
-70-01
-69-93
-69-92
-69-88
-69-95
-69-99
-69-91
GREENWICH OBSERVATIONS.
STAR-TRANSITS OBSERVED BY MB HOLLIS WITH TRANSIT E.,
AND
RESULTING CLOCK ERRORS.
Star's Name
Observed
Transit.
Star's Name.
x'
2
Observed
Transit.
1898 October 11.
Greenwich.
17 Pegasi
18 Pegasi
a Aquarii
i Pegasi
8 Pegasi
y Aquarii
Bradley 2993.
i\ Aquarii
Pegasi
n Pegasi!
v Pegasi
K Pisciiim
Bradley 3147.
78 Pegasi
19 Piscium....
10*560
11-851
10-560
10*560
10-676
10*560
21. 52. ["36
21.55. 57
22. O. 36-26
22. 2. 1 8 '94
22. 5. 679
22. 1 6. 26-90
22. 21. 33-66
22. 30. 10-55
22. 36. 2&-O2
22. 38. l6'7I
20. 21 *O2
21. 45-96
28. 8-04
1-81
6-17
3675
>9"34
7-26
27-39
31-66
1 1 '04
26-47
17-09
21-38
46*40
4-76
2 3- 38. 55'39| 5572
23. 41. 14-52 14-95
1-84
6-21
36-85
9-57
7'33
27-50
3''55
ii "16
26-64
17-21
21-58
46-63
5-30
56-03
15-10
0-03
0*04
O'lO
0-23
0-07
O'll
o-n
O'I2
0-17
O'I2
O'2O
0-23
0-54
0-3I
0-15
8
O'OI
0*03
0-09
0'22 i
o'o6
o'io
o'n
o'i6
o'n
O'2O
0-23
o'-ji
0-15
20 Pisciuin
21 Pisciuin
<(> Pegasi
co Piscium
29 Piscium.....
Bradley 16728.?.
Polaris
Polaris
o Piscium '.
Piazzi I. 175
54 Ceti :
Arietis
a Arietis. ..._
15 Arietis
10-560
11-313
11-720
1 1 -054
10*560
7-1 22*12
h m
23. 42. 45 "66 46-11
23. 44. 17-85 18-29
23. 47. 21-75
23- 54- 8*25
23. 56.3970
0. 13. 42-41
1. 23. 1 1 "04
23. 10-49
40. 4-44
43. 13-08
3>"35
4'59
45-
49-
i. 29-1 ,
5. 2'6i
,*6 3
2*04
4*90
13-56
31-80
5*01
30*10
3*03
46-42
18-56
22-31
8*86
40*28
49-27
1-82
1-82
5 '3
3-53
31*80
5-08
30-24
O'-tl
0-27
0*19
0*29
0*10
0*94
0*19
0-03
o'oo
0-07
0-14
O'I2
0-31
0-27
0*19
0-29
o'io
0*14
O'O2
O'OI
o'o8
0-15
0*14
1898 October 12.
Greenwich.
e Pegasi W
16 Pegasi W
17 Pegasi W
a Aqunrii W
ft Pegasi W
X Aquarii W
u Pegasi | W
Bradley 3147 1 W
19 Piscium.
20 Piscium.
21 Piscium
Piazzi 0. I E
y Pegasi
10-560
10-250
10-560
9 10*560
9
21. 39.
21. 48.
21. 52.
22. O.
22. 45.
22. 47.
23. 20.
23. 28.
2 3* 4'-
23. 42.
23. 44.
14-10
28-54
I -40
36-27
8-40
2l*4O
21*16
8-82
I4-54
45-71
17*99
o. 5. 9*81
o. 8. 3*22
14-49
28-86
1-78
36*70
8-72
21-86
21-49
4'S7
4'93
46-15
18-41
10*30
3*63
14*44
28*92
,-83
36-84
8*86
22*00
21*57
5 - '3
15*10
46*42
18*56
0*05
-(- 0*06
T '5
+ -'4
+ 0-14
+ 0-14
+ 0-08
-j- 0*16
+ -'7
+ 0-27
+ o-'S
10 "06 0-24
3-48 0-15
0*07
+ 0*04
+ o-3
-j- 0*12
+ 0*07
+ '0-17
+ 0-27
-)- 0*12
0*24
0*15
Bradley 1672 S.P.
44 Piscinm
10 Ceti
12 Ceti
v AndromediK
t Piscium
e Piscium
Polaris
Polaris
105 Piscium .
o Piscium
Piazzi I. 175 .
E 10
E
E
E
E
E
E
10
10-133
10*560
9-005
9*116
10-560
o. 13. 40-51 48-35
o. 20. 14*49 14-96
O. 21. 27-66 j 28 13
o. 24. 54-13 54-62
O. 44. I 6*06
o. 57. 43*16
II "20
11-35
23. 11-58
34. 14-87
40. 4-52
43* '3'7
-6'34
43-60
11*65
'"39
0*67
J 5'*3
4*91
13*48
49'45 i + '-"->
14-94
28*06
54-54
16*25
11-50
i '90
i '90
'S'3 1
5*04
3'54
0*02
0*07
0-08
0-09
0-08
- 0*15
+ '-23
-j- 0-08
T -'3
+ 0*06
0*02
0-07
0-08
0-08
0-07
0-14
0-09
0*14
0*07
1898 October 13.
Greenwich.
y Equulei ..................... j E
fCygni ......................... E
o Equulei ..................... ' E
ft Aquarii
d Aquiirii
c Pegasi
o Aquarii
Bradley 2993
rj Pegasi
10*560
3-I59 J
10-560 j
21.
21.
21.
21.
21.
21.
21.
22.
22. 21.
22. 38.
26-31
3874
47-08
26*40
14-07
473
36-58
34-25
17-05
26-83
39-18
47-62
15*71
26-95
14-59
s;5
32*18
17-49
26-53
39*00
47'32
2671
I4H3
475
31-15
17-19
0*30
0-18
- 0-30
0-25
0-24
o'i6
0-30
0-31
0*30
O'2I
'33
0-28
0*26
0-18
0*32
0-33
0-31
14 Ceti
15 Ceti
55 Piscium
Polaris
105 Piscium
i/ Piscium
54 Andromedse ,
o Pisciuin
a Arietis .
W 9
W; 9
Wj 9
W 20
10*560
10-733
10*560
, 22*86
o. 30.
o. 32.
o- 34.
23-
34-
.36.
37-
40.
2. I. 3O'OO
9'34
I5-OI
11*61 !
21*69
476
Z3-37
56-46
38-21
59-53
15*46
I2*IO
21*95
5-24
30*42
i.56'i2
38-00
2*01
15*32
11*98
21-68
5'5
30*27
0*22
'34
O'2I
+ 2- 4 8
0-14
0"I2
0-27
0*19
0-15
O'2I
0-33
O'I2
O'lO
0-25
0-17
0-13
STAR-TRANSITS OBSERVED BY MR HOLLLS WITH TRANSIT E., AND RESULTING CLOCK ERRORS.
167
Star's Name.
8 I
i
< =
'
Obaerred
Transit.
sg .
= !<
"III
Star's Name.
.1
*. s
Observed
Transit.
1*?
ill!
1898 October 17.
Greenwich.
i Pegasi
Groombridge 3548 ,
{ Aquarii
tl Aquarii
e Pegasi
16 Pegasi
a Aquarii
9 Pegiisi
Bradley 2993
j Pegasi W 9
9-702
10*552
10*560 21. 17. 27 29 26*70 , 25*67
12*744 | 21. 19. 38*75 54*63 j 52*03
10*560 21. 32. 25*56 24-48 23*44
21. 34. 28*64 27-73 26-66
21. 39. 16*25 ' '5-48 ! 14*38
21. 48. 30*46 30*00 28*85
22. o. 38-90; 37*95 | 36*79
22. 5. 9*31 | 8*47 7*36
22. 21. 20*56 j 32*53 30*43
22. 38. i8'66 i 18-24 : '7''S
1-03
2'6o
1*0-
1-07
I *IO
'-'5
1-16
1*06
1*07
1*10
1*18
1-13
70 Aquarii
fa Pegasi
/3 Pegasi
o Pegasi
Aquarii
96 Aquarii
a Andromedas
y Pegasi
Bradley 1672 S.P.
\V
W
w
\v
w
w
w
w
w
W 2C
i o 7 1 8
22. 41. 42*65
22. 43. 1479
22. 45. 10*50
22. 58. 55-47
22. 59.4 6 76
23. 9. 8- 9 I
23. 14. I3*32
o. 3. 12*97
o. 8. 5*37
o. 14. 26*86
42-09
13-61
9-96
55 oo
46-03
7-81
12-23
12-52
4-64
53^5
41-09
I2'6o
8-82
53-89
44^7
6-80
11*07
11-42
3-48
50*05
*OO
'01
"'4
ii
06
*oi
'IO
16
3*90
1*01
1-02
1*15
1*12
I*0 7
1*02
1*17
I'lO
1*16
1898 October 18.
Greenwich.
6 1 Cygni
y Equulei
a Equulei .....
30 Capricorni .
Groombriilge 3548 ! W
Aquarii I W
(/ Aquarii I W
Pegasi W
ff Aquarii
7 Aquani
Bradley 2993..
17 Aquar.i I E 9
Cl'egasi ! E 9
n Pegasi K 9
A. Pegasi K 6
it Piscium . Ei 9
10-560
10 '01 1
10-560
21. 2. 24-26
21. 5.28-66
21. 8. 40-61
21. 10. 49'5I
21. 12. 21 '02
21. 19. 34-69
21. 32. 25'8l
21. 34. 28-89
21. 39. 16-44
10-560 22. ii. 33*99
,, I 22. l6. 30 08
13-432 \ 22. 21. l8'27
10-560 22. 30. I3'76
22. 36. 28-8l
22. 38. I9'OI
22. 45. lO-gO
23. 21. 49'12 '
24-06
27-78
40-18
48-54
9-58
52-I4
24-58
2/-S6
15-56
2q"O2
31-70
12-73
27 '99
18-62
10-38
48-1.
22*69
26*45
38-91
47'25
18*35
51*69
2 3'43
26*65
I4-37
31-33
2 7'43
30-23
1 1 *io
26*58
17*14
8*81
46*60
'37
''33
1-27
i 29
1-23
0*45
1-15
1*21
I*1 9
I* 4 8
'59J
"'47
1*63
1*41
1*48
'"57
1*51
''37
1-3
''3 2
1-26
''"3
-'24
I *22
1-50
'"43
1-50
'"59
1-52
Bradley 3147.
12 Ceti
14 Ceti
15 Ceti
58 Piscium....
2 Ursae Minoris.
E Piscium
77 Pisciuin
e Piscium
f) Andromedae...,
33 Ceti
' 1'iscium
/Pi-cium
Polaris ...
K,
E
K
K
EE
W
W
w
w
\v
w
w
\v
W
Polaris... . E
8*496
10-560
11*886
10*560
10 10*930
10 13*909
23.27.47-13
o. 24. 57*17
o. 30. 25*79
o. 32. 58*84
o. 41. 49'n
0. 54. 57*07
o- 57- 45-69
1. o. 39-52
i. 3. 1378
i. 4. 7*91
i. 5- 2 5'6i
i. 8. 31*01
I. 12. 39-25
I. 22. I2*5O
I. 22. 19*14
5-70
56*06
24-75
57-80
48-31
10 60
4477
38-54
I2'8l
7-62
24-58
30-08
38-24
2-28
9-88
4*29
54-55
23*16
56-13
46*76
'4'
'55
*7
"53
*22
-20
69
84
3-04
I-4I
''5'
''59
I*6 7
-'55 ;
''9
I '22 '
'37 ;
\'h\
[ft
0*76
6*84
1*50
,- 5 8
1*66
'"54
1*21
I*36
1*27
'"39
'"37
1*48
1898 October 19.
Greenwich.
o Cassiopeia
58 Piscium
Piazzi 0. 189 ....
v Audromedte...
2O Ceti
2 Uisae Miuoris .
Polaris ...
1898 October 22
a Arietis ........................ W
15 Arietis ..................... \V
' Ceti
123
27 AriKtis
Piazzi II.
5 Ceti....,
p 2 Arietis
e Arietis
S Arietis
Groombridge 2283 S.P. ...
1898 October 23.
Bradley 2993.
Cl'egasi
7| Pegasi
\ 1'egasi
A Aquarii
ft Pegasi
58
Bradley 3147.
ID Piscium
30 Piscium
33 Piscium
a Andromeda 1
Piazzi i
7 Pegasi
Bradley 1672 S.P. .
10-560
1 1 -420
11-315
8; 10-558
9 "
i "
9 ' 10*560
6 | \\
10 14 '302
E 20 11*230
E I 9 10*560
E 9 ,,
K 20 10-895
W
W
W
W
w
w
w
10-560
8*984
o. 39
o. 41
o. 43,
o. 44. 18*02
0.47. 55-02
0. 54. 56-97
1. 22. 1275
2. I. 33-22
2. 5. 6'2O
2 - 7- 43'54
2. 22. 51 '84
2. 25. 22-84
2. 30. 37-12
2. 34. 23-17
2. 50. 12-43
30-73
55-66
36 *io
9-28 9-41
49^3 4^45
9-26
2 - 53
3- 5
3- 9
22. 21,
22. 36,
22. 38,
22.41
22.45,
22. 47,
22. 58
22. 59
23. 4
23. 27,
18*78
2 9'74
1 9 '94
44*00
1172
25-50
56-69
48 10 I
0-78 '
4777
12-08
23. 54.
2 3- 5 6 - 5>7
o. o. 14-87
o. 3. 14-22
o. 5. 13-58
o. 8. 6'6i
o. 14. 31*81
8*24
7-87
53-88
10*70
3-05
3 2 '54
5 44
42-60
50-89
22*05
36-14
22*08
ii '65
30*01
54-9 1
12*62
32*14
28*88
19*51
43'4'
11*16
24*28
56 21
47-33
59*90
6-25
11*09
50-54
13-64
1371
12*36
579
54-98
7'55
46*76
6*58
16*27
52*26
9*42
3''9
30-37
J'*,7
40*32
48*86
19*82
34*06
19*87
2 777 1
5 2 "7"t j
11*67 I
28*99
26-52
17-08
41 '02
8*76
21-91
53-82
44*92
57'5'
8*83
48-23
1 1 '36
1 1 '40
10*04
i 3"4 2
51-65
1*8-.
1-69
1*66
1*60
1-62
1-28
0-14
2*17
2*17
2*28
2*03
2-23
2-08
2 '2 I
2-13
2*24
2*17
0*95
3"'5
2*36
2 "43
2 '39
2-40
2 '37
2 "39
2*41
z'39
3''"
2*26
2-31
2*28
2*31
2*32
2 '37
3'33
Polaris
IT Piscium . . . .
105 Piscium .
v Piscium ....
Piaxzi I. 175 .
54 Ceti
7 Arietis
a Arietis....
Greenwich.
2-16
2*16
2*27
2"OI
*'*i
2*06
2-19
2*11
2*22
2*I 5
I0 3 .
Piazzi III.
17 Tauri....
23 Tauri
Piazzi III. 187....
33 Tauri
\ Tauri
Groombridge 750.
a>- Tauri
7 Tauri
x ' Tauri
Greenwich.
2 "37
2 '44
2*40
2*41
2-38
2*40
2*42
2*40
2-26
2-31
2-28
2*31
2-32
2 '37
12 Ceti
51 Piscium
14 Ceti
15 Ceti
55 Pisciuin
58 Piscium
S Piscium
2 Ursse Minoris .
e Piscium ..
77 Piscium.
e PUcium...
r Piscium..
f 1 Piscium .
/Piscium...
e Ceti
Polaris ...
W
W
W
W
W,
w!
E
E
E
. E
. E
E
E
W ii
10*933
10^560
10-560
10-849
10-560
10-688
22. 14*71
31. 48-69
34. I7*80
36. 14*69
43. l6*22
45- 34-46
48. 3*04
i. 32*60
10*560 i 3. 34. 47*37
10*758 T . ,.
10*560 ] 4. ii.
3.38.
3- 4-
3-47-
3-5'-
3-55-
4- 4-
4- '4-
4.16.
24*15
27*98
8*89
9*61
54'44
24*82
7*11
30-41
o. 24. 57-94
o. 27. 15-85
o. 30. 26-64
o- 3 2 - 59-57
o. 34. 40-96
0.41. 49-96
o. 43. 31-26
o- 54- 577
0. 57.4676
1. o. 40-48
i. 3. 14-82
I. 6. IO'20
i. 8. 32-03
I. 12. 40-26
I. 19. 372
I. 22. 14-26
5-96
47-87
17-06
13-73
15-23
33-61
2-36
32"O2
46-61
56-32
33-53
27-24
8-26
8 -7*
4 '95
24-14
6-34
29*82
5674
14*86
2 5'5'
58*44
40-27
49'07
30-19
11*15
45-84
39-5 '
13*86
9-77
31-11
39" 2 5
2-49
4-54
3-19
46-16
'5"37
12-03
13-60
3''*7
0-82
30-34
46!
*2 2 |
'44 |
'02
06
'49
*oi
'3
63
54-54
12-52
2 3"<5
56-12
38-01
4*'77
27-99
9-26
37''9
11-54
7 '44
28-86
36-86
0-08
3-02
2'77
171
l-6 9
170
I-6j
'74
i '54
1-68
- 2-15 -
2'10 |
2-09
- 2-22 j-
2'2O
2-29
''74
2-13
2*2U {
2*19
2"2O
2 '34
2-36
2-32
2-26
2-30
2-30
1-89
2-28
2-32
2-32
2 '33
2-25
2*39
2-41
1-52
i 70
1*68
i '69
1*62
'73
'"53
1-66
2*13
2*07
2 "06
2*19
2*17
2*26
2*IO
2'l8
2*l6
2*2O
2-34
2 '35
2-32
2*26
2-29
2-29
2-27
2-31
2-31
2*32
2-24
2*38
2-40
168
TELEGRAPHIC DETERMINATION OF LONGITUDE, GRKENWICH-KILLORGLIN, 1898.
Star's Name.
I
Observed
Transit.
"?** i w
S 5
Star's Name.
.
" E
Transit
Observed.
eel'
l
11*1
1898 October 24.
Greenwich.
Bradley 1993
a Aquarii
n Aquarii
( Pegasi
i Piscium
78 Pegasi
19 Piscium
Piazzi XX III. 200.
<f> Pegasi
Piazzi 0. 33
Bradley 1672 S.P.
12 Ceti
51 Piscium
14 Ceti
15 Ceti
58 Piscium
Piazzi 0. 189
'9
8
9 j
9i
9
9;
9
7
11-253
10*560
\V
W
W 9
W 9
W Q
Wi 9
W 9
W. 9
h m
22. 21.
22. 25.
22. 30.
22. 36.
23- 34-
23. 38.
23. 41.
23.45.
23. 47.
8
19-48
23-08
14-63
29-98
50-18
59"03
18-89
7 '43
25-65
10-560 o. 12. 41 '49
10-703 i o. 14. 34-09
10-560 ; o. 24. 58-31
, o. 27. 16-08
,, ! o. 30. 26 89
o. 32. 59-87
,, ; o. 41. 50-18
,, o. 43. 10-09
33-14
21-73
'3 '49
29-06
49-16
5 S '53
17-82
6-09
24-91
40-34
56-28
57 '5
15-03
2570
58-68
49-24
9-0 1
28-73
19-23
1 1 03
26-51
46-57
55'9 6
15-06
3-30
22-27
52-00
54'54
12-52
23-15
56-12
46'77
6-59
4-41
2-50
2-46
2 '55
2-59
2 "57
2-76
2 "79
2-64
2-50
4-28
2-51
2-51
2-55
2-56
2 '47
2-42
2-52
2-48
- 2-56
2 '59
2-57
- 2-76
- 2-79
- 2-64
2-50
2-51
2-5!
2-54
- z '5|
2-46
2-41
20 Ceti
e Piscium
33 Ceti
Polaris
TI Pisciu
TT Piscium
105 I
v Pis
54 A
a Piciu
oinedn?
W
e
r
j o'c6o
h 111 S
o. 44. 1 9 '03
s
18-81
H
I6-28
I
2 '<;";
it
2
W
o. 47. 55 '97
54"77
52*27
2*t;o
2
omoilffi
W
O. C I. 17 '28
1 2'QQ
1O'47
2-?6
Minuris
W
20
10*67 l
o. 54. 57 '30
11*06
9*1 S
i-SS
\Y
10*560
o. 58. 42*31
41 'i c
38*64
2'C I
2
iuiu
W
i, o. 40*75
-10*67
?7* 1 Q
2-48
W
I, 1. I 1 *IO
W
i. c. 26*00
2^*76
27'22
2*54
2
W
1 1 '68 1
I. 22. I 7 '7.6
4*26
2*8?
F,
1O
io*8qc
I. 22. 10*48
2 *34
2*85
+ O*C 1
am
K
5
10*560
i. 26. 9*57
8'75
6*26
2 '49
2
um
F,
g
i. 32. 49*74
48*86
46*19
2*67
2
cium
K
q
i. 34. 18*86
18*06
i <;*4O
2-66
F,
11
i. -;6. 15*71;
1 2*06
2*67
F
K
i, 40. 8 'So
7'*?
C*14
2 "71
2
-) *
1898 October 28.
Killorglin.
18 Pegasi
a Aquarii
Pegasi
9 Aquarii
7 Aquarii
Bradley 2993
C Pegasi
\ Pegasi
/u Pegasi
K Pisciuin
Bradley 3147 .
78 Pegasi
19 Piscium
20 Piscium
21 Piscium
29 Piscium
10-850
10-335
10-850
10-850
io"355
10-850
34H7
4-98
35-53
59|52
57HI
21. 55-
22. I.
22. 5-
22. ii.
22. l6
22. 21.
22. 36. 54-96
22. 42. 9-36
22.45. 37-17
23. 22. 1573
23. 28. 2974
39- 25-17
41. 44-41
43- i5'5i
45- 47-67
57. 9'5 6
34 '43
4-95
35'49
59-49
55^4
56-63
54'9Z
9-31
37-12
15-78
28-85
25-21
44-46
15-56
47 72
9 '6 1
5 '99
36-65
7"'3
31-21
27-32
27-80
26-47
40-97
8-70
2'OO
55-92
15-03
46-34
18-50
4O'22
-28-44
-28-30
-28-36
-28-28
-28-32
-28-83
-28-45
-28-34
-28-42
-29-25
-26-85
-29-29
-29-43
-29-22
-29'22
-29-39
28-99
28-83
28-86
2876
28-77
28-68
28-76
29-41
-29-38
29-51
29-28
-29-31
29-40
33 Piscinm
o Andromeda
y Pfgasi
Biadley 1672 S.P.
51 Piscium
14 Ceti
20 Ceti
2 Ur.re Minoris.
77 Piscium
e Piscium
<(> Piscium
/Piscium
Polaris
it Piscium
C Ceii
7 Arielia
E
K
E
E 10
E 9
E 9
E 9
10-850
9'334
10-850
8-ioi
10-850
10-229
10-850
o. o. 40*51 40*56
O. 3. 40-58 ; 40-62
o. 8. 32741 32-78
o. 14. 22-06 I 22-32
o. 27. 42-04 ' 42*09
o. 30. 52-59} 52-64
o. 48. 2i"8o j 21-85
55.40-31
I. 6-64
3. 40-86
8. 46-72
6-32
35-26
i. 32. 15-80
i. 46. 59-63
I.
I.
i.
i. 13
1.23
39-5I
6-60
40*82
46-67
6-28
3^-47
15-76
59-60
i. 48. 30-27 30-23
11 33
11-38
3 "45
53''4
12-52
23-15
52-27
8-92
37-20
11-55
17-45
36-88
2 '54
146-21
30-1 1
o'8o
-29-23
-29-24
- J 9'33
-29-18
-29-57
-29-49
-29-58
-30-59
-29-40
-29-27
-29-22
-29-40
-29-93
-29'55
-29 49
-29-34
1898 October 29.
Killorglin.
(3 Pegasi
58 Pegasi
Aquarii
7 Piscium
iji 3 Aquarii
T Pegasi
u Pegasi
K Piscium
Bradley 3147
27 Piscium
29 Piscium
4 Ceti
o Andromed*.
Piazzi 0. I
7 Pegasi
10-850
12-165
10-850
22. 59. 28 76
23. S . 32-58
23. 9.4176
23. 12. 31-97
23. 14. l8'82
23. l6. 14-61
23. 2O. 56-72
23. 22. 21-67
-
28*81
32-64
41-82
32-03
18-89
14-66
5 6 "77
21*73
* ^ <> / i /J
23. 28. 36*69 36-58
4. 6*92
7- 1573
3. 10*50
3- 46-85
5- 45-42
8. 38-92
6-90
I57I
10-48
46*8 1
45-40
38-89
5377
57'46
6-70
56-93
437'
3945
2 I "46
46-52
i'So
40-22
35-02
ii"37
IO'O2
3'44
-35-04
-35-18
-35-12
-35-10
-35-18
-35-21
-35'3
-35-21
-3478
-35'47
-35-49
-35-46
-35-44
-35-38
-34-29
-35-43
-35-33
-35-30
-35'37
-35 39
-35 47
-35H9
-35'5
-35-45
-3542
-35-36
-35-41
Biadley 1672 S.P.
51 Piscium
14 Ceti
55 Piscium
20 Ceti
/j. Audromedse
2 Ursse Minoris
e Piscium....
Polaris
7; Piscium
ir Piscium....
105 Fistium.
v Pisciun
o Piscium....
11-704
10-850
9-836
10*850
10-035
10-850
o. 14. 25-21 27-27
o. 27. 48*14 48*12
o. 30. 58-85 i 58-83
- 35- 1371 ; 13-68
o. 48. 28*04 ' 28-02
o. 51. 46*29 ' 46*24
0. 55.47-27! 46-46
1. 3. 47-28} 47-26
I. 23. 31-61
I. 26. 42-33
I. 32. 22'l6
i. 34. 51 V3
I. 36. 48*10
I. 40. 41-19
31-24
42-39
22*22
51H9
48-16
41-25
12-51
23-14
38-01
10-43
8*88
11*55
2*56
6*28
46*22
12*08
35-61
35' 6 7
35-75
3571
28*68
36-11
36*00
36*06
36*08
36*10
1898 October 31.
17 Pegasi I W
18 Pegasi W
Aquarii W
1 Pegasi | \V
fl Pegasi ' W
( Cephei W
Aquarii
Bradley 2993
7j Aquarii
f Pegasi
rj Pegasi
Killorglin.
a Andromeda;.
Pegasi
9 i 10*850
9
9
9
9
9
10-658
10*850
10-850
21. 52.
21. 55.
22. I.
22. 3.
22. 5.
22. 8.
22. 12.
22. 22.
22. 30.
22. 37.
22. 39-
47-70
52*05
22*65
5-33
53-25
8*11
17-24
15-08
57-26
12-63
3''7
22.58. 3-89
22. 59. 4O-OO
47-90
52-26
22-86
5-52
53-46
8-24
14-41
57'47
12-83
3-35
1-58
5'95
36-61
19-29
7-09
2T88
31*17
27*15
10*95
26-43
16*98
4-i6 ; 17*57
40*28 , 53-74
-46-32
-46-31
-46-25
-46-23
-46-37
-46-36
-46-28
-47-26
-46-52
-46*40
-46-37
-46-59
-46-54
-46^82
-46*79
-4671
-46*69
-46-81
-46-80
-46-70
-46-87
-46-73
-46-69
-46-83
-4677
58 Pegasi
<t> Aquarii
7 Piscium
^ Ai'uani
ip Aquaiii
T Pegasi
Bradley 3147
78 Pegasi
19 I'iscium
20 Piscium
21 Piscium
Piazzi XXIII. 200.
22 Piscium
Pegasi
10-850
10-646
10-850
2 3- 5-
23. 9.
23. 12.
23. 13.
23. 14.
23. 16.
23. 28.
23. 39.
23. 42.
23- 43-
23-45-
23-45-
23- 47-
23.48.
43-89
53-10
43-37
26-97
30-24
25-93
46*04
42-46
1-76
12-97
5'i5
50-02
35-5I
8-87
44-17
53-39
43*66
27*26
3 -54
26*21
46-01
4273
2*05
13-26
5 '44
50-32
35-8o
9-15
57-44
6-68
56-91
40-51
43-69
39'43
i"39
55'9
15-01
46-32
18-48
3-40
48-88
22-23
-4673
-46-71
-46*75
-46-75
-46-85
-46-78
-44-62
-46-83
-47-04
-46-94
-46-96
-46-92
-46-92
-46-92
STAR-TRANSITS OBSERVED BY MR HOLLIS WITH TRANSIT E., AND RESULTING CLOCK ERRORS.
169
Star's Name.
Observed
Transit.
111
-fi-a
e<**s:
Star's Name.
Observed
Transit.
Ill
o g>
-t!
1898 October 31 continued.
33 Pisdmn
4 Celi
5 Celi
Piuzzi 0. I
y Pegasi
Bradley 1672 S.P.
44 Pisciiim
55 Piscinm.
58 Piscinm.
S Piscinm..
1898 November 3.
a Aqnarii ............ ... ...... E
i Pcgnsi ........... .............. E
6 Pe<;asi ......................... E
( Cepln i ...................
6 Aijii-irii ..................
y Ac-uarii ..................
>) Aijiiarii ....... .........
1'i
'igasi
58 Pegasi
y Pisciiim
1898 November 5.
a Aijuniii
i Pegasi
Bri dlry 2993 .
II P<gasi
X Pegasi
70 Aqiiaiii
A Aqnarii
Bradley 3033..
u Andioiuei'se.
r'n.d]ey 3147.
20 Pitt-icim
u 1'iscinm..
1898 November 8.
18 Pegasi... E
a Ai'uarii E
, Pegasi E
t! Pegasi E
S Aqnalii E
7 Aqnarii E
Bradley 2993 E
i) Aquarii E
X 1'efiasi E
70 Aquarii ; E
p Pegasi E
A Aqnarii i E
58 Pegasi | W
Ac**iarii I W
96 Aquarii.
r Pegasi
Bradley 3147.
i Pisciura
78 Pegasi
10*850
10*830
10*850
10-850
o. 0.57*91
o. 3.21*86
o. 3. 49 '94
o. 5. 56-88
o. 8. 49*98
o. I4-45-05
0. 21. 1*82
o. 35.24*93
o. 42. 33*65
o. 44. 14*86 I 15*06
58*20
22*15
50*23
57-I7
50*26
45*88
25-12
10*850
22. o. 39*29 ; 39*86
22. 2. 21 *S8 i 22*4O
977! 10-32
5-
7- 24-5! 25*00
22. ii. 33 '8 3
22. l6. 3O*IO
22. 30. 1373
22. 36. 29*09
34*42
30 67
14*30
29*64
22. 38. 19*67 i 2O*I9
22. 59. 47*58 ! 48*12
23. 5. 0*28 0*83
23. ii. 5977! 0*33
23. 13.46*58 47'17
W 9
W 9
W 10
W 9
10*850
10*850
10 12 827
9 I 10*850
9' .,
22. O.
22. 2.
22. 21.
22. 30.
22. 36.
22. 38.
22. 41.
22.43.
22.45.
22.47.
22. 5 2.
22. 57 .
30*97
42-33
22 65
38-16
28*83
5273
24'!!
20*55
33 49
16-28
29*56
4883
31*40
36*24
23*26
38*70
29*21
53-17
2478
20*99
34'H
16-85
29-80
23. 28. 15*80 13-38
23. 42. 57*61 i 58*61
23. 54. 20*24 ' 2118
10-850 21. 55. 32*72 33*76
i 22. I. 3*12 4*2O
22. 2. 46*07 47"OO
22. 5. 33*81 34*85
22. II. 5772 I 58*85
22. 16. 53*93 55*02
9
9
7
9
4
y
10
9 ! 10*850 '22. 30. 37-75
9
9
9
9!
10*632 22. 21. 53*68
22. 42. 7*86
'22. 43. 39*23
22.45-35-65
! 22. 47. 48*63
51-97
3883
8*80
40*38
36-58
49*76
10-850
10*291
10*850
23. 5-2475 25*39
2 3- 9- 33' 8 3 34-57
23.14.38*13 38*87
23. 16. 6'8o 7*33
23. 28. 39*29 30-52
23. 35. 14*01 j 14*68
23. 39- 23-40 23*88
(1*32
35-01
3*18
10*01
3'43
5 3 '9
14*92
38*00
46*76
27*98
3 6 '57
19*25
7*05
2178
31*13
27*24
10*92
26*40
16*94
44-81
57'4i
56*89
I 43-67
Killonjhn.
46-88
47*14
47*05
47-16
-46*83
-51-98
-47-19
46*88
47"'3
47*03
47 - '4
46*80
47-11
47*12 I 46*98
47*09 ! 46*92
47 '08 ' 46*91
20 Ceti
u Anflromedse..
2 Ursse Miuoris
26 Ceti
/3 Andromedee...
T Pisc-ium
Polaris.
Polaris.
Killorglin.
3| 2 9
3*27
3-22 -
3-29
- 3-43 i -
3"24
3-25
3-31
3*42
3 '44
3'5
371
3*56
3*67
3*6,
3-07
3'79
3-69
3'53
3'54
3'6l i
3-61
3*66
27 Piscium W
Bradley 1672 S.P. W
Ceti.
51 Piscium
14 Ceti
15 Celi
S Andromedse...,
58 Piscium
2 Ursae Minoris..
Killorglin.
19*22
25-82
10-89
26*37
16*91
40*87
12*40
8*60
21*77
4'54;
17-49 ;
0*00
46-29
875
5-84
36*51
19*18
6*99
31*07
27*18
24-96
10*86
40*83
12*37
8-57
21 74
57-36
6*61
10*88
39-35
59*06
46*46
12*28
-12*18
-10*42
-12*37
-12*33
-12-30
-12-30
-12-38
-12*39
-12*37
-12*31
-12*31
-13*38
-12*32
-12*43
-27*92
-27*69
-27*82
-27*86
-27*78
-27*84
27*01 '
-27-97
-27*97
-28*01
-28*01
-28*02
-28-03
-27-96
-27*99
-27*98
-31*46
-28*22
-28*05
- 1 2 '69
-12-58
-12*67
]2*6l
-12*57
-12-56
-12 '64
-12*64
-12*62
-12*54
-12*52
-12*38
-12*45
29 Piscium
33 Piscium
4 Ceti
5 Ceti
Piazzi 0. I
7 Pegasi
Piazzi 0. 33
Bradley 1672 S.P..
10 Ceti
12 Ceti
51 Piscium
14 Ceti
15 Ceti ,
58 Piseinm
S Piscium
20 Ceti
Killorglin.
-28-36
28*11
28-24
28*27
28-17
28-21
28 29
28-25
28-28
28-28
28*28
28-22
28-14
28*15
28*14
28*31
28*12
19 Piseium W
20 Piseinm W
21 Piscium W
Piazzi XXIII. 200 W
22 Piscium W
29 Piscium W
33 Piscium W
4 Ceti W
5 Ceti W
7 Pega.si W
Bradley 1672 S.P JW
12 Ceti W
14 Celi W
15 Ceti W
55 Piscium W
B Andromeda' E
T Piscium E
Polaris ... .. E
T Pegasi E 5
Bradley 3147 E 10
10*850
u
9*924
10*850
10*938
12729
h m s
o. 48. 39-31
o. 51. 57-23
o. 55. 59*03
0. 59. 25*61
i- 4- 53-03
1. 6. 54*32
i. 9. 4*34
i. 24. 0-29
i. 23.4273
39'52
57*4
58-34
25*82
53-21
54-50
4'53
42-21
10*850
8*876
10*850
12*900
10*850
10*436
23. 15. 42-33 42*85
23. 28. I -21 2'10
23- 53- 34'47 34'67
o. 13. 46*01 , 56-80
0.24. 5-7-38 I 57*58
o. 27. 15-52 j 1570
o. 30. 26*14 i 26*34
o. 32. 59-19; 59-39
o. 34. 0*32 0*41
o. 41. 49*
o. 55. 18-33
50*04
7 ; 10*850 j 2j. 56. 51-60
9 o. o. 2272
8 ,, o. 2. 46*56
9 j ,, o. 3. 14*62
9 o. 5.21*49
9 ,, o. 8. 14*93
9 , ; o- I2.49'38
10 9-234 I o. 13. 54*12
9 10-850 o. 21. 39*57
9 >i [ 0-25. 6-n
9 ,, o. 27. 24-20
9 . o- 3- 3479
9 .. o- 33- 7'72 !
9 0.41.58*48
9 > 0.43. 39*58
9 .. 0-48. 379
52*60
2374
47-56
15-61
22*50
15*82
5'35
0*98
40 55
7-11
25*14
3577
870
59'39
40-52
4*78
10*850 23. 41. 42*45
23.43.13*46!
,, 23.44.45*58
,, 23.45.30*69
23. 47. 16*10!
,, '23.57. 7-40
o. o. 38*36
o. 3. 2*25
o. 3. 30-45
., o. 8. 30*90
11730 o. 14. 4-97
10*850 O. 25. 21 -95
o- 3- 57
- 33-2377;
o. 35. 5*81 i
10*850 I. 4 34*01
,, ; '. 6 -35-27
10*690 1.23. 30*92
14-18
46-28
31*46
16*79
8*12
39*10
31-17
31-50
23*82
22*68
51*41
24*48
6*36
34-87
36-17
22*37
52*26
10-42
8*81
38-65
6*25
7'45
17-45
2'55
2 '55
40*18
11*29
34*98
3''5
9*98
3-4i
3779
55-9'
28*02
54-5
12*49
23-12
56*09
46*75
27*97
52-25
14-95
46-26
18-42
3'33
48*81
40-15
1 1 '26
34-96
3-39
57'34
54*48
23'ii
56*08
6*25
7 '45
0*50
39-40
0*61
31*40
55-00
54'S 1
12*50
23*13
56-10
57'9
46*76
8*62
47-26
-46-98
-49-53
47"'7
46*96
47*05
-47-08
5472
39*66
3H5
1*49
3-27
1*80
3-07
3-20
3'2i
3-29
3-32
3*28
5*84
-12*42
-12*45
-12*58
- 1 2 '46
-12*52
-I2*4I
-12-56
- 5 '"7
-12*53
12 '6 1
-12*65
-12*65
-12*61
-12*64
-12*55
-12*53
28-18
27*92
27*86
-28-13
-27*98
27-97
-27*84
28*01
28*04
28*11
26-48
28-20
28-30
28-40
-28-38
-28-62
28*72
-21*87
47*07
-46*78
46*94
46-7
46*79
46*8
- 3-60
3" 1
3*1
3*18
3*20
3*13
-12*43
-12*45
-12*57
-12*45
-12*50
-12*38
-12-52
-12*46
-12*53
-12*56
-12*55
-12*50
-12*50
-12*40
-12*37
28-24
27-98
27*91
28-13
28-02
27-98
27-
28*00
28*03
28*08
28*11
28-19
28*28
28-25
-28-39
28-48
170
TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH-KILLORGLIN, 1898.
Star's Name.
.
.2
Observed
Transit.
.Star's Name.
I
4g
Observed
Transit.
iyl
^coso
1898 November 9.
Bradley 2993..
r) Pegasi
/i Pegasi
o Andromeda:.
/3 Pegasi
w Pegasi . . .
Bradley 2993.
f Pegasi
1 Pfgasi
A Pegasi
fi Pegasi
S Aquarii
a Pegasi
58 Peg'isi
y Piscium
r Pegnsi
58 Piscium....
7 Cassiopeia.
/ 1'iscium
6
7 Aquarii
Bradley 2993
58 Aquarii j W
ij Aquarii I W
C Pegasi W
r, Pegasi W
X Pegasi W
70 Aquarii W
^ Pegasi W
\Aquarii W
S Aquarii W
/3 Pegasi W
a Pegasi W
96 Aquarii E
T Pegasi E
v Pegasi E
K Piscium E
Bradley 3147 E
21 Piscium i E
Piazzi XXIII. 200 j E
j 2 Piscium ! E
</> Pegasi I E
27 Piscium I E
1898 November 10.
1898 November 13.
1898 November 17.
Bradley 3147.
a> Piscium
30 Piscium....
33 Piscium....
4 Ceti
ii '497 | 22. 22. 7 '24
10-850 j 22. 38. 48-84
[22.45.40-31
22. 57. 49-60
22.59.25-56
23. 20. 53-24
58-17 , 24-69
49 '66 16-85
41-21 ; 8-55
50-18 17-42
26-41 53-62
54-16 21-35
1O I5'55O 22. 22.
9 10-900 22. 37
8
4'M
3 "oo
10-900
22. 38.5379
22. 42. I? "65
22. 45.45-42
22.49. 55' 12
23. o. 2172
23. 5. 34-24
O'OI
4-30
54'9'
18-83
46-60
56-65
22-98
35'55
23. 12. 33-68 35-04
23. 16. 16-44 17-62
24-44
26-3 1
16-83
40-80
8-54
18-46
4473
57 '34
56-82
39'3 2
0.42. 24-27 25-35 46'73
0. 51. 16*99 17-22 ' 38-97
1. 13. 14-04 15-20 I 36*88
10-902
10-705
10-902
10-900
22. 12. 23 08
22. 17. 19-34
22. 22. l8'55
22. 27. 13-22
22.31. 3-05
22. 37. 18-58
*2. 39. 9-09
22.42. 33-04
22. 44. 4*60
22. 46. O'72
22. 48. 13-89
22. 50. IO7I
59- 45 '97
23. o. 37-02
10-900
11-442
10-900
23. 15.
23. 16.
23.21.
23. 22.
23.28.
23. 45.
2 3-45-
23. 47.
23.48.
2 3- 54-
3-48
3'"93
14-01
39-07
46-94
II"I2
56-09
41-50
15-02
24-18
23-87
20-13
18-67
14*00
3-84
19-38
9-89
33^4
5-38
I'52
I4'68
11-49
4677
37-82
4 '47
3 2 '95
15-03
40-06
49-87
I2'II
57-08
42-50
l6'O3
25-17
31 oo
27-11
23-70
20-88
io'8o
26-28
16-79
40-76
12-31
8-52
21-68
18-42
53'57
44-70
10-83
39-29
21-30
46-38
577'
18-38
3-29
4877
22-I3
31-39
10 j 10-734
9 I 10-950
6
9
7
23.27.46-03 3-48
23. 54. 16-14 15-28
23. 56. 55-821 54-71
o. o. 18-93 I '7-83
o. 2.42-51 41-47
8-66
48-06
1 1*19
1898 November 18.
Bradley 2993...
i) Pegasi
\ Pegasi
y Cassiopeiie ...
Andromedfe.
fl'Ceti...
8-129
10-950
22. 21. 19-28 32-05 22-30
22. 38. 24-01 , 23'72 1671
22.41.48-13 47-69 40-69
o 50.44-92 45-87 38-87
4
i. 19
13-24
8-17
13-09
7-13
6 '20
0-07
-32-81
32 *66
-3276
-32-79
-32-8,
-35-57
-37-99
-38-08
-38-03
-38-06
-38-19
-38-25
-38-21
-38-22
-38-30
-38-62
-38-25
-38-32
-52-87
-53-02
-54-97
-53-12
-53-04
-53-10
-53 10
-53-08
-53-07
-53-02
-53-00
-53-07
-53-20
-53-12
-53-64
-53-66
-5373
-53-68
-52-16
-5373
-5379
-5373
-53-90
-5378
6-96
6-62
6-65
6-64
975
7-01
7-00
7-00
6-89
7 '06
Killorglin.
33-1,
3 2- 93 !
-32-98
32*01
3 2 "95
Bradley 3147 W 10
Bradley 3147.
51 Piscium.. ..
62 Piscium...
Killorglin.
-38-28
-38-37
-38-30
-38-33
-38-44
-38-47
-38-41
-3 8 '37
-38-45
-38-47
-58-04
-38-05
9 Ceti W
Polaris W
ir Piscium W
105 Pisuuim W
v Piscium W
o Piscium W
Arietis W
60 Ceti W
a Arietis...
27 Arietis .
29 Arietis .
a Ceti
Li'amlu 5724 .
Killorglin.
53-26
53-39
>3'4 2
53-34
53'39
53-39
53-36
53'34
-53-28
53-26
53"3 2
53"4 2
53-34
-53-80
-53-81
-53'8i
29 Piscium E
4 Ceti E
5 Ceti E
y Pegasi E
Bradley 16728. P E
51 Piscium j E
14 Ceti E
15 Ceti E
58 Piscium.
S Piscium..
-5378
-53-84
-53-77
-53'94
-53-80
2 Ursae Minoris
77 Piscium I \V
e Piscium i W
33 Ceti W
T Piscium I W
Piscium ' W
/Piscium i W
Polaris W
10; Piscium W
i/ Piscium .
o Piscium .
54 Ceti....
y Arietis . .
ft Arietis . .
Greenwich.
6-62
5-65
6-64 !
6-58
5 Ceti ' E
Piazzi 0. I ! E
y P.'gasi
Piazzi 0. 33.
E
E
Bradley 16728.?. [ E
Greenwich.
7-02
7-01
6-99
6-88
7-05
Polaris W
Poiaiis E
T 1 Arietis E
T- Arietis E
o Tauri.... . E
12-361
i5"577
10-850
10-900
10-717
10-900
9
10
9
9
9
9
9
g
9j
9
9 ;
9 10-900
10 900
10-653
10*900
7-337
10-900
io"66o
10*900
10-950
10-868
h 111 8
23. 28. 47-80
23.28. 36-47
o. 27. 44-43
o. 43. 36-41
35-01
29-79
45-93
37-90
I. 19. 37-20
I. 24. 13-18
1. 32. 23-63
1.34.52-88
i. 36. 49-39
i. 40. 42-59
i. 49. 42-89
1. 58. 39-91
2. 2. 8-22
2. 25. 57-80
2.28. 174
2 - 57- 39'58 40-93
3. i. 30-66! 31-93
38-46
46-97
2471
53'9 2
5-'53
437
43-89
41-10
9-19
58-83
*3- 57- 3 2 "39
o. 3- 27 86
o. 3. 55 9*
o. 8.56-11
o. 14. 57-88
0.28. 5-47
o. 31. 16-06
49-06
4 2 - 39'75
44. 20-91
o. 33.
0. 56. 1-23
1. i. 30-22
i. 4. 4'44
i. 6. 16 16
i. 7. 0-48
i. 9. 10-38
i. 13. 29-75
i. 23. 57-36
i. 35. 8-40
' 37- 5"7
i. 40. 58-19
1.46. 25-23
i. 48. 53-9?
i. 49. 58-28
33-88
28-85
56-91
57-12
55-06
6-47
17-05
40-75
21-91
'"33
31-02
5' 2 4
16-95
1-28
11-18
30'54
55-50
9-20
5-97
58-99
26-03
5475
59-o8
o. 3. 10-87
o- 5- '7'73
o. 8. 10-70
O. 12. 45-39
o. 14. 43-73
16-64
lO'OO
44-43
8-55
9 "'357 .
10 11-728
6 10-950
. 22. 23-71 11-82
22. 10-28
'5- 3p8
17. 6-03
19. 32-31
57-16
32-79
5-53
31-58
58-76
5876
12-47
4 '49
o'og
o'oi
46-24
15-46
I2'IO
5-I9
5-30
2-50
30-50
19-99
23-96
40-41
34'9 !
3-09
3-36
59^4
> 2 '45
23-08
56-06
4672
27-94
37-i8
. "'5 +
; 23-22
7-44
; '7'45
. 36-88
59-16
15-46
I2'IO
5''9
31-98
0-94
5-30
3 "06
9-88
3'33
377'
I "2 I
5 7 '47
57-47
75-66
58-38
24-50
36-25
31-03
33-46
33-41
33-36
-33' 2 5
38-37 38-08
68
-40 'y6
-38-47
-38-46
-38-43
-38-51
-3 8 '59 .
--,8-60
-38-69
-38-84
-38-84
39-22
39' 2 5
-38-13
38-11
-38-08
-38-14
-38-,,
-38-17
-38-25
-38-31
-38-30
-38-58
-53 77
-53-93
-53-82
-5370
-5T02
-53 97
-5|.-oo
-54-03
-53'97
-53 9
-53-84
-53-70
-53 73
-5373
-53-66
-5 6 '34
-5374
5 j-o
5i'9'
53'So
5!"9'
-53-5
-5J-8X
-S! 88
-53-62
-53-46
-53-49
-53">9
-53-4*
-53'39
53'39
53'5 2
53-8o 53-44
-54'05 I 53'67
-53-8i | 53-42
-5378 -53-3*
6-77
6 76
6-67
672
7'34
677
6-76
6-67
672
-r-o-3.
- 7 7 '.\\\~
7-08
7-09
7-11
7-04
STAR-TRANSITS OBSERVED BY MR HOLLIS WITH TRANSIT E., AND RESULTING CLOCK ERRORS.
171
Stai's Name.
I i
\
.3
I
Observed
Transit.
Il
star's Name.
Observed
Transit.
v s
D
w
1898 November 20.
Bradley 3147
78 Pejjasi
19 Piscium
zo Piseium
1 1 Piscium
22 Piscium
Pischim
29 Piscium
33 Piscium
4 Ceti
5 Ceti
ylVgasi
Bnulley 1672 S.P
1898 November 22.
Groomliridfie 3548 ............. W
* Aquarii ....................... i W
d Aqnarii ....................... I W
Pegasi ....................... W
W
[W
VCygni
16 Prgasi
17 Pegasi
18 Pegnsi
9 PegaM
y A<[\iarii E
I'raclley 2993 E
58 Aquaiii.
T) Pegasi
1'iiadley 3147
20 Piscium
21 Piscium
Fiazzi XXIII. 200
<(> Pigasi ,
a Piseiuin
30 Pischnn
1898 November 25.
Groombridge, 3548 E
d Aquarii E
T 2 Cygi)i E
16 Pegasi E
18 Pigasi E
a AqiMlii E
6 Ac|iiarii E
y Aquarii E
Bradley 2993 E
Bradley 3147 E
i Andromedse E
i Piscium E
21 Pisrium W
22 Piscium W
Piscium W
30 Piseium W
33 Piscium W
4 Ceti W
a Andromeda W
Piazzi 0. I W
y Pegasi W
1898 November 27.
Brailley 3147 .......
Bi a-lley 1672 S.P.
44 Piscium ..........
51 Piscium ..........
i5Ceti
14*264 ! 23. 27. 46*84
10-950 23. 39. 3-31
'23. 41. 23-06
,, : 23. 43-54"42
:23. 44. 26-64
,, 23. 46. 56-90
*3- 54- '6-82
23.56.48-48
,, o.o. 19-47
o. 2.43-31
- 3- "'39
,, O. 8. 11-21 ;
10-752 o. 14. 49-47
7-I27
10-950
21. 19. 27-55
21. 32. 31 '62
21. 34. 34 66
21 -19. 22-15
21. 43. lO'So
21. 48. 36-32
21. 52. 9*62
21. 56. 14*15
22. 5. 15-32
22. 16.
22. 21.
9 10-950
IO IO'6l8
6 ' 10*950 22.26.
9
9
13-876
22. 3-
22.36.
22. 38.
23. 27
10-950 23.42.
23.44.
23.45.
23.47.
23.54.
23.56.
35-82
1O"49
29-94
'9-48
34-72
24-66
36-76
55-11
27-24
12-43
30-42
17-36
57-17
12-784 21. ig. 26-72
10-950 21. 34. 35-80
21. 43. 12-45
21.48.37-45
21.55.15-28
,, 22. O. 46-07
22. II. 4O'4I
22. 16. 36-53
9-596 22. 21. 14-23
10-982 23. 27. 42-98
10-950 23. 33. 20-24
23.34.55-56
10-950 23. 44. 27-36
23.46. 5777
,, 23. 54. 17-64
23-56.57'3j
o. o. 20-41 I
,, ! o. 2.44-13
,, o. 3. 19-70
,, o. 5. 19-12
,, o. 8. 12-17
3 -,8
3"3
22-29
53-54
25-83
56-12
i6"n
47 '5 9
18-54
42-44
10-52
10-65
16-82
5'39
3'34
33-63
21-31
11-34
35-92
8-84
13-23
'4'39
34 7
27-44
28-59
18-40
33-91
24 '39
0'12
53-96
26-19
I I 'IO
29-83
16-45
5 5 '94
44H5
35-02
12-90
14-59
45-24
35-68
27-66
i'47
20-45
54-85
26-56
57-00
16-95
56-36
19-47
43-26
19-49
10 8-878123.27.42-52! 2-96
10 io'io6 o. 14. 53-75 | 13-30
9 10-950
9 ,,
9
6
O. 20. 24-35
O. 27. 21 -92 21-19
o. 30. 32-74
o. 33. 6-03
31-86
5 - '5
55-39
557'
14-84
46-15
18-31
48-72
8-63
40-05
n'i6
34-86
3-03
3'3
3-07
37-95
22-95
26-17
13-88
375
28-29
1-28
5-64
6-82
27-00
21 '06
20-76
10-69
26-17
16-65
54-67
46-13
18-29
3-20
22-04
8 61
48-02
36-86
26-13
3-68
28-25
5-61
36 29
30-85
26 -96
20-26
5375
11-94
46-30
18-26
48-67
8'59
47-99
11-14
9'8l
3-26
6-75
'475
12-35
22-99
55'9 6
Greenwich.
779
7-32
7'45
7'39
7-52
7-40
- 7-32
7-45
7-39
7-40
- 7-54 - 7-54
- 7 '49 ! 7 "49
- 7'35 - 7'35
-13*75
Bradley 16728.?..
10 Ceti
12 Ceti
51 Piscium
14 Ceti
15 Ceti
55 Piscium
58 Piscium
Piazzi 0. 189
v Audromedae
20 Ceti
2 Ursse Minoris....
Polaris....
Greenwich.
-12-44
7 39
7'46
7'43
7'59
7 '63
7-56
7"54
7'57
771
6-38
7-83
77'
774
7 '74
5'45
7-83
7'9
1 7 '9
' 779
7-84
7-92
7-41
7-48
7-45
7 -6i
7-65
7-58
7-6,
-84
772
775
775
'7-83
7-90
7-90
7'79
7 84
33 Piscium
4 Ceti
5 Ceti r
Piazzi 0. I
y Pegisi
Bradley 1672 S.P.
10 Ceti
12 Ceti
51 Piscium
14 Ceti
15 Ceti
e Piscium
Andromedae.,
33 Ceti
T Piscium
f 1 Piscium
/ Piscium
Polaris
IT Piscium
105 Piscium....
Piscium...
Greenwich.
7-59
8-89
9-22
8-92
8-98 j .
- 8-95!
- 8-59 !
- 872!
8-30
8-33
8-36
8-37;
8-35 !
8-44
8-35
8-38
8-39
8-92 I
9' 2 5 i
8-95
9'oi
8-97
8-61
8-74
8-51
8-55
8-30
833
8-36
8-37
8-35
8-44
8-35
8-38
8-39
Brailley 1672 S.P. ,
12 Ceti
51 Piscium
14 Ceti
15 Ceti
55 Pi>cium
58 Piscium
S Piscium
v Andromedse
20 Ceti
2 Ursa; Minoris
77 Piscium
e Piscium
Polaris
W
\v
W
\v
W
W
jw
W
I w
I W
w
w
\v
Polaris
Piazzi 1. 175
54 Ceti
y Arietis
jl Arietis E
112 Piscium E
a Arietis E
Greenwich.
9-81
6-55
877
8-84
8-87
9-19
- 877
8-84
8'86
9-18
55 Piscium
58 Pis'jium
Piaz/i 0. 189
y Andromeda. 1
2 Ursa; Minoris
12-798
10-950
12-458
10-458
10-950
11-093
10-950
10-950
10-942
10-950
ii
11-082
1 1-981
10-950
10-950
13-063
10-343
10-950
h m 8
o. 14. 40-93
O. 21. 36*00
o. 25. 2-56
o. 27. 20-40
o. 30. 31-26
o. 33. 4-40
o- 34-45-72
0.41. 54-69
0. 43. 14-51
o- 44- 23-47
0.48. 0-38
0.55. 2-15
1. 22. 22'49
o. o. 20*34
o. 2.43*90
O. 3. I2'OI
o. 5. 19-08
o. 8. 1 1 -8 1 j
o. 15. 3-20;
O. 21. 36-76
o. 25- 3 '43
o. 27. 21-15
o. 30. 32-06
o. 33. 5-09
3- 19-92
4- 1378
5.31-85
6. 15-32
8. 37*22
iz. 45'53
21. 56-16
31- 5472!
-34- 23*82)
. 36. 20*68 !
o. 14.
o. 25.
o. 27.
o. 30.
o. 33.
o. 34.
o. 42.
o. 43.
o. 44.
0. 48.
0.55.
1. O.
I. 3.
I. 22.
5271
3'54
21-33
32-l8
5''7
16-63
55-66
36-89
24-33
'"37
1-03
46-32
20*51
14-68
7-36
3S'7
1-66
19-69
30-42
3-56
44-28
54'7
1377
23'5
59'53
14-66
8-29
19-12
42-76
10-87
17-87
11 -ii
1679
35-68
2-25
20-24
30-96
3'99
18-98
13-70
30-82
15-05
36-32
44'53
o"97
53-95
23-14
19-73
15-19
2-64
20*64
31-34
4-33
15-24
55'7
36*21
24-47
0-52
15*17
45-60
19*80
6-16
3'57
22 '20
I. 22. 13-32
1.43. 22*94
1.45.41-161 40 56
1.48. 9-87! 9-44
1.49. 14-25! 13-85
55- 4'
' 39-35
o. 34. 47 "2 '
o. 41. 56*16
o. 43. i6'oo
o. 44. 24-67
o. 55. 0-07
4-22
39*01
46-81
55'54
15-24
24-84
3-07
27-93
54"4i
12-40
23-04
56*01
37-9I
46*69
6-51
16*14
52-19
6-44
56-30
11-15
34-85
3-02
9-84
3-28
4'25
27-91
54-39
12 39
23-03
56-00
11-50
6-18
23-18
7-40
28-68
36-85
55-16
46-23
'5'45
12*09
576
54-37
12-37
23-01
37 V
46-66
27-87 !
16-10 |
52-16
5'55
37-13
11-49
5378;
5378
13-69
31-98
0-94
5-30
4-29
7-24
7-25
7-29
7-38
7'55
7-37
7-38
7-26
7-36
7'34
8-22
11-99
- I
7-25
7'55
7'37
7'3'
7-2
7'35
30*52
7-97
7'9'
12-54
777
7-86
7-85
7 "93
7 - 48
7'64
- 7-65
7 '64
7*68
- 5-81
772
7' 6 9
7-64
- 9'43
- 8-27
- 8-27
- 8-33
- 8-35
- 8-36
- 8-41
- 8-34
- 8*37
- 8-36
- 9-62
- 8-47
- 8-31
-12-38
- 979
- 8-5.
- 8-58
- 8-50
- 8-55
- 8-51
8-49
7-9-
7'9
7-8
8-0
7-8
777
7-86
7'99
7'47
7'5
7*6
7-64
77'
7*68
7-63
37-86
46-64
6-46
1 6 -08
- S'95
- 8 -90
- 878
- 876
-10-09
8-26
8-26
8-32
8-34
8'35
8-40
8-33
8-36
8'35
8-46
8-30
8-49
8-56
8-48
8-53
8-49
8-47
8'94
8-89
877
875
TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH-KILLORGLIN, 1898.
Star's Name.
Observed
Transit.
-
*
= St.
III JS'I
r? S .-n "> 2 * T
Star's Name.
Observed
Transit.
II
11*8
G !H
1898 November 27 continued.
Greenivich.
Polaris
ft. Arietis
Ceti
40 Arietis
<r Arietis
p 2 Arietis
p 3 Arietis
i Arietis
A Ceti
a Ceti
S Aiietis
( Arietis
Groombridge 2283 S.P
11-195
10-950
1. 22.
2. 3 6.
2. 39.
2.43.
2. 4 6.
2. 5 0.
2. 50.
2.53.
2.54.
2.57.
3- 6.
3- 9-
3. 9.
472
51-80
40-69
3'95
6-65
19-69
55-86
37'97
30-06
11-97
2 '99
17-60
46-94
59-04
5''37
40-04
3-48
6-n
19*22
S5-38
37'57
29-38
11*19
z '53
17-20
5 2 '93
42-13
3'74
54-18
56-81
9-84
45-92
28-12
>9'97
1-82
53'H
77'
7-89
6-n
- 9'*4
9'3
9-30
9-30
- 9-38
9 '46
9 '45
9-41
9'37
9'4'
, 9-49
' 9'85
9 -2 7
9 -2 7
9'35
9'43
9-42
- 9-38
9'34
- 9'38
9'4 6
I Tauri E
/Tauri E
Piam III. 87
E
17 Tauri W
7-Tuuri W
e Tauri Wl
f Persei W
33 Tauri WJ
X Tauri Wl
A 1 Tauri W
A 2 Tauri W
Groombridge 750 W
95
950
3.21.53-48 52-82
3.25. 29-59
3. 28. 34-82
10*992
3- 39- 3 '98
3. 41. 40-11
3-4Z- 5 5 '44
58-18
15-87
34-35
54-81
58-06
15-52
'5'93
3-47
3- 5'
3- 55 l6 '53
3. 58. 54-70 54-32
3.59.32-85 32-47
4- 5- 2 '59 ' 6 '3 8
43*61 ; 9'2I
'973 I 9' 2 7
25*15 9-20
5476
30-92
45'9'
49' 2 3
6-64
7-03
45 '-H
23-63
7-98
- 8-89
8-86 i
8-90 '
8-83
8-88 j
- 8-90
- 8-78
- 8-84!
8-40
9''7
9*23
9"i6
8*85
8-82
8-86
879
8-84
8-86
74
8-80
XIV. MEAN CLOCK ERROR.
Forming now the means of Column 8 in the preceding pages for each group of clock
stars observed in positions of the instrument Micrometer West or Micrometer East
respectively, the results shown in the tables on pages 174 to 177 are obtained. The first
five columns require no explanation. In the sixth column the results of Columns 4 and
5 are corrected for systematic difference between the two positions W and E. To
obtain this correction, the clock errors shown in the various groups on each day were
all reduced to the same epoch by applying the clock rates given subsequently. The
means of the results W and E were then taken, weighting according to the number of
stars in each group, and the difference of these means formed for each day. These
differences are given in the following table, and assigning the weights to them shown
iu the third column the mean differences are formed :
CLOCK ERROR.
173
Transit D.
Transit E.
Date.
1898.
W E.
Weight.
Date.
1898.
W E.
Weight.
Killorglin.
Greenwich.
s
8
October 1 1
+ 0-03
2
October 1 1
2
H
+ 0'02
I
12
+ O'2I
2
22
+ '03
2
3
+ 0-09
I
2 3
+ 0-23
2
'7
+ '3
I
18
+ 0-25
2
'9
O'O2
I
22
O'OI
I
Greenwich.
2 3
+ 0'07
2
2 4
+ O'll
2
October 28
o'ig
2
3
+ 0-07
2
3'
0-04
2
Killorglin.
November i
0-06
2
3
+ '3
2
October 28
+ 0-44 2
4
O'll
2
29
+ O'OI
2
5
0-07
2
3'
+ 0-15
2
6
0-04
2
November 3
+ 0-48
I
10
O'OO
2
5
- 0-13
I
12
+ 0-03
I
8
+ 0-17
2
'3
o-o i
2
9
-f 0-31
I
10
+ 0-24
2
'3
-t- 0-42 2
Killorglin.
Greenwich.
November 1 6
+ 0-18 2
17
- O-O; 2
November 1 8
+ O'og I
18
+ o-o i
2
20
4- O'l I I
21
O'OI
I
22
+ 0'27 2
26
o'og
I
25
+ 35
2
2 7
- 0-13
Z
z7
+ 0-46
2
Means
0-008
38
-f 0-2O3
37
The following corrections have therefore been applied in forming the corrected
clock-error in Column 6 :
For Transit E, -- 8 '10 to West groups, +0 S '10 to East groups.
For Transit D, no correction has been applied.
GRBENWICH OBSERVATIONS.
174 TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH-KILLORGLIN, 1898.
Clock Error found by Mr Dyson with Transit D.
Date.
1898.
Mean
R.A.
of Group.
Number
of Stars.
Mean Clock
Error.
Corrected.
Difference
from
Mean.
Date.
1898.
Mean
R.A.
of Group.
Number
of Stars.
Mean Clock
Error.
Corrected.
Difference
from
Mean.
W.
E.
W.
E.
Oct. 1 1
Oct. 14
Oct. 1 8
Oct. 22
Oct. 23
Oct. 28
Oct. 30
b in
20 41-9
22 O'2
o 55-0
Kilh
5
10
9
wglin Clo
S
13-60
+ 36-88
+ 28-30
+ 9-65
+ 8-64
+ 27
tenwich Ct
3-16
- 3-01
- 3'45
- 3'Si
I
B&
s
10-09
-21-17
+ 37-05
+ 8-97
+ 2 '95
+ 2-21
oclc.
- 2-86
- 2-83
- 3'4'
- 3"4'
s
10-09
13-60
21-17
+ 5^2
+ 2-11
- 5'4 6
+ 0-08
O'Og
o-oo
+ 0-56
O'I2
~ O+S
+ 0-28
+ 0-03
0'46
- 0-23
+ 0-07
0-08
+ O'lO
+ 0-04
+ O'OO
+ 0-04
o - o6
Oct. 3 1
Nov. i
Nov. 3
Nov. 4
Nov. 5
Nov. 6
li ni
21 5
22 54
o 53
Greenwicl
9
20
12
i Clock c
3
- 3-68
- 3'76
- 379
ontinued.
s
- 3-54
- 3-7I
8
- 3'54
- 3'68
- 37'
s
+ O'I2
O'02
0-05
O'OO
+ 0-04
0'02
+ 0-09
O'O2
0-08
0-06
+ O-Og
o'o6
+ 0-02
+ 0-02
+ 0-02
0-07
O'07
+ O'C2
O"O2
+ 0-07
22 49-4
10, 14
-15708
23 5
2O, 21
- 3-658
20 45-6
22 I'l
6
5
+ 37-05
+ 36-88
21 27
22 21
23 24
10
IO
10
- 376
21 199
5, 6
+ 36-973
7 2
- 4-I7
- 4' 2 9
- 4'36
- 4-58
- 4-61
- 4-56
3 72
- 379
21 42-4
5
+ 28 30
22 24
1
2O, IO
- 3757
21 36
23 2 1
I 2
1 40
'3
17
7
4
4-06
- 4">7
- 4' 2 3
- 4-21
21 42-4
5, o
+ 28-300
21 16-9
23 21-3
i 2-9
7
n
6
+ 9-65
+ 8-97
+ 8-64
- 4 oo
- 4' 2 3
- 4' 21
- 4'44
4-60
- 4 <6 9
- 4-69
- 4-65
23 2 5
24,7
23 10-4
13, I"
+ 9-086
4 '49
21 35
22 |8
23 10
3
7
8
- 4' 2 9
- 4'44
- 4'36
21 59-4
23 56-0
I 4-2
7
15
5
+ 2-95
+ 2-70
+ 2-21
2 3 38-4
Ij, 12
+ 2-674
22 34
7- ii
- 4'38o
23 n
2 2
2 32
3 2 7
Gr
2
6
6
6
- 3-16
- 2-86
- 3''
- 2-83
22 3
23 21
o 56
34
ii
21
9
5
4-60
- 4-58
- 4 <6 9
- 4' 6 9
2 19
8,12
2-926
2 3 35
25,21
- 4-618
21 12
2i 24
*3 4
o 56
7
'4
7
9
- 3'4'
- 3'45
- 3'+'
- 3-51
22 8
23 33
i 19
1 1
15
2
- 4-6,
- 4-65
- 4-56
23 2
*3, >4
- .V449
23 7
15, '3
4/628
i
CLOCK ERROR.
Clock Error found by Mr Dyson with Transit D. continued.
775
Date
1898.
Mean
R.A.
of Group.
Number
of Stars.
Mean Clock
Error.
Corrected.
Differeuce
from
Mean.
Date.
1898.
Mean
R.A.
of Group.
Number
of Stars.
Mean Clock
Error.
Corrected.
Difference
from
Mean.
W.
E.
W.
E.
Greenwich Clock continued.
Killorglin Clock continued.
h HI a i s s
s
h in
s
g
a s
Nov. 10 21 19
2
- 5'3'
- 5'3'
4- 0'12
Xov. 17
22 6-O
4
-14-48
-14-48
+ 0-39
22 4
8
- 5-43
- 5'43
+ O'OO
22 46-8
7
-14-52
-14-52
+ 0-35
23 26
21
- 5"44
- 5 '44
- o-oi
23 )2'I
12
- 14-88
-14-88
O'OI
o 59
8
~ 5H3
o-oo
1 VO
9
15-18
-15-18
- 0-31
i 26
i
- 5'37
- 5-37
+ o'o6
I 42-8
2
-15-42
-15-42
- '55
23 24
'7,23
- 5-428
23 51-5
18, 16
14-870
Nov. 12
22 55
o 45
3
3
- 5-86
- 5-88
- 5-88
- 5-86
o-oi
4- O'oi
Nov. 1 8
Z2 4-9
22 46-5
23 58-9
4
7
12
-19-77
20-25
-19-97
-1977
-19-97
20-25
+ 0-42
+ O-22
o - o6
23 5
3,3
- 5-870
1 1-4
I 28-9
6
2
2O'6o
-20-47
-20-47
20-60
0-28
- 0-41
Nov. 1 3
22 22
7
6'O2
6'O2
0-05
2 3 457
18,13
20-190
23 9
9
5-93
- 5 '93
+ 0-04
22
I 12
1 26
1 1
i
2
- 5'9 6
- 5-86
6-19
- 5 '9 6
- 5-86
+ O'Ol
O'22
+ O'l I
Nov. 2 1
22 59-1
o 6 '9
8
10
-35-80
-36-04
-35-80
-36-04
+ 0-13
O'll
23 36-8
8, 10
-35-933
23 38
20, 10
- 5-966
Nov. 26
23 1-9
9
64-06
64-06
+ 0-14
23 49'5
9
-64-33
-64-33
- 0-13
Killorijlin Clock.
'3 257
9, 9
-64-195
Nov. 16
22 17-4
10
- 8-87
- 8-87
+ 0-38
Nov. 27
i 0-7
8
70-26
70-26
4- 0-14
o 23-5
8
- 9'57
- 9'57
- 0-32
2 4'2
I 2
-70-35
-70-35
4- 0-05
I 33-0
2
- 9-83
- 9' 8 3
0-58
3 3-6
7
70-66
70-66
0-26
23 27-4
12, 8
- 9' 2 4 6
2 0'8
15, 12
-70-404
Clock Error found by Mr Holli with Transit E.
Greenwich Clock.
Greenwich Clock continued.
Oct. ii 22 13
9
+ O'l I
+ 0'2 I
+ 0-04
Oct. 1 2
22 44
10 (+ O'll
+ O'OI
+ O'OI
2 3 4'
9 + 0-23
+ 0-13
0-04
o 31
8
O'l I
O'OI
O'OI
' 51
6
+ 0-07
+ 0-17
O'OO
i 39
3
+ 0-09
o-oi
O'Ol
2 3 4>
9, '5
+ 0-I70
23 50
13,8
O'OOO
176 TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH- KILLORGLIN, 1898.
Clock Error found by Mr Hollis with Transit E. continued.
Date.
1898.
Mean
R.A.
of Group.
Number
of Stars.
Mean Clock
Error.
Corrected.
Difference
from
Mean.
Date.
1898.
Mean
R.A.
of Group.
Number
of Stars.
Mean Clock
Error.
Corrected.
Difference
from
Mean.
W.
E.
W.
E.
Oct. 13
Oct. 17
Oct. 1 8
Oct. 19
Oct. 22
Oct. 23
Oct. 24
h m
21 36
I 16
Greenwich
9
8
, Clock e
S
0'2I
I '08
- 1-25
- ''35
- 1-69
- 2-17
- z'30
- 2 '5'
ontinued.
3
O'26
rOg
- ''55
- " 6 7
- 2-18
- 2- 39
- 2 '33
- 2-61
- 2-63
s
0-16
- 0-31
s
+ 0-07
O'o8
+ O'l I
- 0-08
+ '7
0-03
0-03
- 0-13
+ 0-09
0-09
+ o - io
+ 0-04
0-07
+ o-io
+ 0-05
0*05
+ 0-03
Oct. 28
Oct. 29
Oct. 3 1
Nov. 3
Nov. 5
Nov. 8
Nov. 9
h in
22 ig-l
o o'3
1 21'6
Ki
8
12
7
llorglin C
-28-36
'oek.
s
-29-35
-35 -I 7
-36-07
s
28-46
-29-25
s
+ 0-62
- 0-17
23 19
8,9
O'2 2 I
-29-38
-29-48
+ '47
23 51-4
15, I2
21 42
23 8
7
10
- '99
- 1-18
23 12-0
22'0
i 337
o
12
5
-35-07
22 33
10,7
IMO2
-35'57
-46-34
-47-10
- 3'3
12-32
-28-08
-3277
-35-67
-35'97
- 0-13
- 0-43
+ '35
+ o-oi
- 0-41
+ 0-03
0-07
+ O'Ol
O'OO
+ 0-28
o-io
21 18
23 19
i 5
8
ii
7
''35
- ''45
- ''45
o 13-9
12, 13
-35'54 2
22 I 1 '9
23 36-5
o 52-8
10
21
9
-46-44
23 10
15, ii
'-419
46 88
3-33
46-78
-47-20
o 43
' 43
5
7
- '79
''57
2 3 3 2 '5
19,21
-46-790
22 35-3
o 26-4
14
7
3-23
i 18
5,7
- 1-662
-' 2 '53
-27-90
-28-67
-33-44
- 3-33
2 30
3 55
10
9
- 2-27
2-08
23 12-3 7, 14
- 3' 2 63
22 35-8
o 16-3
1 1
17
-12-42
3 10
10,9
2-180
- I2 '43
2 3 36-8
n, 17
12-426
22 47
o 19
i 7
8
13
7
- 2-29
- 2-40
- 2-23
22 217
23 50 - 6
I 5'I
ii
20
2
-27-80
-28-18
5
13, 15
-28-57
0-49
+ 0-13
- 0-34
*3 2S'5
20, 13
23 15
43
1 34
8
'4
6
- 2 '5'
- 2-61
- 2 '53
-28-077
22 56-0
o 35 i
5
2
-32-87
-33-34
o 29
14, H
- 2 '564
23 24-3
5, 2
-33-004
CLOCK Ji
Clock Error found by Mr Hollis with Transit E. continued.
177
Mean Clock
Mean Clock
Date
1898.
Mean
R.A.
of Group.
Number
of Stars.
Error.
Corrected.
Difference,
from
Mean.
Date
1898.
Mean
R.A.
of Group.
Number
of Stars.
Error.
Corrected.
Difference,
from
Mean.
W. E.
W.
E.
Killorglin Clock continued.
Greenwich Clock continued.
h m
s
H
s
s
h m
s
s
s
s
Nov. i o
22 54-7
9
-38-15
-38-05
+ 0-41
I 38-5
'3
-38-54
-38-64
0-18
Nov. 20
23 53
1 1
- 7-45
- 7'35
+ 0-04
2 59-9
2
-39-24
-39-14
- 0-68
o 35
IO
- 7-34
- 7'44
0-05
o 43-9
13, II
-38-460
13
10, I I
- 7'393
NOV. 13 22 40-6
'3
-53-06
-53-16
+ "44
NOV. 22
21 46
8
- 7'53
- 7-63
+ 0-09
2 3 58-4
18
53-83
-5373
- 0-13
23 43
21
- 7-85
- 775
0-03
I 25-I
12
-53-80
-53-90
- 0-30
i 16
9
- 7-63
- 773
O'OI
23 59-1
25,18
-53-605
23 40
17,21
- 7-720
Nov. 25
22 17
9
- 8-81
- 8-71
0-19
Greenwich Clock.
O 22
20
- 8-36
- 8-46
+ 0-06
' 5'
6
- 8-52
- 8-42
+ O'lO
Nov. 17
O ?
8
6-68
6-58
O'OO
8. r IT
O 4
0,8
6-580
5
20, 15
5'7
Nov. 27
o 35
8
- 8-88
- 8-98
+ 0-12
Nov. 18
o 7
5
- 6 '99
- 7-09
0-03
2 59
4
- 9'34
- 9-24
- 0-14
3 '7
3
- 7'iz
- 7-02
+ 0-04
3 49
8
- 8-86
- 8-96
+ 0-14
i 18
5, 3
- 7-064
2 34
16,14
9-096
178 TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH -KILLORGLIN, 1898.
XV. CLOCK RATE.
From comparison of consecutive clock-errors thus determined, the rates of the
Sidereal Standard in the intervals have been determined, and from these the rates given
in Column 2 of the following table, which have been used to form the error of this clock
at the time of the signals, have been deduced. The clock rate found by the observations
with the Greenwich Transit-Circle have been added in Column 3 for comparison.
As the clock Graham 2 used at Killorglin was in an exposed situation, and therefore
liable to fluctuations in rate, although actually the observations showed this rate to be
fairly steady, it was thought advisable to derive its rate from the comparisons by signals
with the Sidereal Standard on nights when two exchanges were made, applying the rate of
the Sidereal Standard given in Column 3 to the relative rate of the clocks in the interval
between the exchanges. The hourly rates of Graham 2 derived in this way are given
in Column 5, and these have been used subsequently.
Sidereal Standard at Greenwich.
Graham z at Killorglin.
Date.
Hourl
Adopted.
Y Rate
By T. C.
Observations.
Date.
Hourly Rate
Adopted.
1898.
_
3
s
October 1 1
0-007
0-005
October 1 1
- 2-556
12
0-009
O'OOS
4
- 'H7
'3
O-OIO
O-OOg
18
0-167
17 o'oii
0'OIO
22
0-263
18
O'OII
O'OI I
23
0-258
'9
0-008
o-oio
22
0-007
0-003
2 3
0-008
0-003
October 28
0-265
2 +
0-008
0-003
31
O'2l6
November 3
- ''95
October 28
O-OIO
O'OIO
5
- 0-183
3
O'OIO
O'OI I
8
- 0-175
3'
0-007
O'OII
9
0-208
November i
0-007
0-008
10
0-225
3
0-009
0-004
'3
- 0-154
4
0-009
0-008
5
0-005
0-005
6
0-004
0-008
November 1 6
0-231
10
0-009
O'OIO
17
0'22I
12
0-006
0-005
18
O-2I9
'3
0-005
...
21
0-2I5
2 7
0-226
November 1 7
o-oio
O'OIO
18
0-013
0-005
20
0-007
22
0-009
O'OII
25
O'Oll
0-013
27
O'OII
O'OIO
EXCHANGES OF SIGNALS.
179
XVI. EXCHANGES OF SIGNALS.
The signals for comparison of the clocks at Greenwich and Killorglin were made
by means of the apparatus mentioned in Section VI. of this account. The exchange
was begun by the observer at Greenwich sending fifteen signals at arbitrary intervals,
consecutive signals being separated by two or three seconds. The observer at Killorglin
then sent thirty signals, and the exchange was completed by the observer at Greenwich
again sending fifteen. Two such exchanges were made on each night when observations
of stars were made at both stations. In the following table Columns 4 and 5 give the
difference of the clocks in the sense East -- West as found by the means of a group of
signals, whose number is given in Column 3. Column 2 gives the Greenwich sidereal
time of the mean of the group, and the time in Column 6 is found by taking the mean
of the times of the groups of signals sent from Greenwich, weighted according to the
number of signals, and then by taking the simple mean of this and the time of the
group sent from Killorglin. The figures in Column 7 are found from those in Columns
4 and 5 in a similar way. The last column is half the difference between the mean
of the figures in Column 4 and those in Column 5 corrected for rate of the clocks,
showing the time of transmission.
Difference of Sidereal Standard and Graham z found by Signals sent from
Greenwich and Killorglin.
Date.
Givcuwicli Numlier
Sidereal ol'
Time. Signals.
Dili'erence c
wigimU s
Greenwich.
f Clocks by
But from
Killorglin.
Means of each Exchange.
Time of
Transmission.
Greenwich
Sidereal Time.
Ditference
of Clocks.
1898.
Oct. 1 1
h in
1 14-4
2 22'8
2 36-4
'7
24
8
Ill S
38 49'34'
38 46-432
in s h tn
z 15-4
38 46-000
Ill S S
38 46-819 0-074
Oct. 1 4
22 l8'5
22 23-4
'9
18
39 4-675I
39 46-824
Z2 2I'O
39 46788
0-042
23 44-5 14
23 49- 2 16
39 46-636
39 46713
Z 3 46-9
39 46-675 0-044
Oct. 1 5
22 48-0 l6
22 52'2 l8
39 43-600
39 43-683
22 5O'I
39 43'642
Oct. 1 6
22 297 27
22 35'I 31
39 40-028
39 40-106
22 32-4
39 40-067
ISO TELEGRAPHIC DETERMINATION OF LONGITUDE, GREEN WICH-KILLORGLIN, 1898.
Difference of Sidereal Standard and Graham z found by Signals sent from
Greenwich and Killorglin continued.
Date.
Greenwich
Sidereal
Time.
Numbei
of
Signals.
Difference
signals 5
Greenwich.
)f Clocks by
ent from
Killorglin.
Means of each Exchange.
Time of
Transmission.
Greenwich
Sidereal Time.
Difference
of Clocks.
1898.
li in
til S
m s
h m
Ill 8
s
Oct. ' 17
23 20-9
12
39 42-595
23 257
22
39 42-675
23 25-6
39 42-635
0*040
23 287
4
39 42-593
|
Oct. 1 8
22 48-4
23 67
12
27
39 39''57
39 39""8
22 57-6
39 39"i93
0-058
I 36-4
I 40-5
4
12
39 387 2 9
39 38-818
I 38-5
39 38774
0-050
Oct. 19
23 46-0
o 7-6
13
21
39 35-402
39 35H37
2 3 56-8
39 35-420
0-044
2 35-5
I I
39 35-094
* 35-5
39 35-045
...
Oct. 20
23 477
13
39 3i'495
23 52-0
'9
39 31-573
*3 5'7
39 31-535
0-037
23 56-3
10
39 31-500
Oct. 2 i
22 52-3
10
39 27'36o
22 597
21
39 2 7'44 6
22 59-0
39 27-396
0-050
23 27
"3
39 2 7'334
Oct. 22
23 17-8
8
39 20-895
23 21-0
24
39 20-959
23 217
39 20-913
0-042
23 25-0
15
39 20-852
i 6-8
ii
39 20-401
i 10-8
22
39 20-488
I I I'O
39 20-4.38
0-049
i 15-5
II
39 20-374
Oct. 23
23 13-2
'5
39 H737
23 16-9
3
39 14-821
23 16-7
39 H'77
0-044
23 20-3
13
39 I4-730
2 28-8
'5
39 13-917
2 32-2
26
39 13-992
2 31-8
39 '3-948
0-046
2 35-0
10
39 13-886
Oct. 24
22 56-4
15
39 8-849
23 O'2
35
39 8-902
23 0'3
39 8-870
0-032
23 3-8
'7
39 8-826
i 46-4
3
39 8-118
1 547
29
39 8 - i6i
I 54-1
39 8-123
0-041
2 1-8
1 1
39 8-045
EXCHANGES OF SIGNALS.
181
Difference of Sidereal Standard and Graham z found by Signals sent from
Greenwii-h and Killorglin continued.
Date.
Greenwich
Sidereal
Time.
Number
of
Signals.
Difference
signals i
Greenwich.
if Clocks by
ent from
Killorglin.
Means of each Exchange.
Time of
Transmission.
Greenwich
Sidereal Time.
Difference
of Clocks.
1898.
Oct. 28
h in
I I 1-4
I 14-8
I 28-9
10
20
'5
Ill S
38 43728
38 43-669
m &
38 43-832
h m
I 18-4
m s
38 43-763
s
0-056
2 4I-3
2 457
2 49-6
13
17
15
38 43-342
38 43-458
38 43-300
2 457
38 43-389
0-069
Oct. 29
23 31-6
23 36-3
23 41-2
'5
20
16
38 37'857
38 37-810
3 8 37-93I
23 36-5
38 37-882
0-049
Oct. 30
23 8'4
23 12-4
23 157
'4
3
16
38 32-007
38 31-975
38 32-086
23 12-3
38 32-038
0-048
i 48-4 15
I 52-2 21
i 55-7 22
38 31-425
38 31-412
38 3I-527
I 52-3
38 31-470
0-055
Oct. 3 1
23 19-9
23 23-9
23 26-6
17 38 27-121
27
16 38 27-114
38 27-207
23 23-6
38 27-163
0-046
i 49-9
1 53'5
i 56-8
15 38 26-612
20
13 38 26-596
38 26-694
i S3'3
38 26-650
0-045
Nov. i
23 23-4 13 38 22-106
23 277 22
23 30-5 16 38 22-058
38 22-194
23 27-5
38 22-137
0-056
Nov. 2
23 57'4
o 1-3
o 3-9
12 38 15-973
22
16 38 15-944
38 16-038
o i -a
38 15-997
0-040
Nov. 3
23 30-6
23 33'6
23 36-4
19 39 10-967
28
21 39 10-952
39 II '47
23 33-6
39 11-003
0-044
i 50-9
i 537
i 56-6
'9
23
17
39 10-521
39 10-499
39 10-602
i 537
39 IO '5S 6
0-046
Nov. 4
23 33-0
23 37'6
23 42-4
18
3i
14
39 6 79 C
39 6 '749
39 6-881
23 37'4
39 6-827
0-055
GREENWICH OBSERVATIONS.
2 a
TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH-KILLORGLIN, 1898.
Difference of Sidereal Standard and Graham 2 found ly Signals sent from
Greenwich and Killnrglin continued.
Date.
Greenwich
Sidereal
Time.
Number
of
Signals.
Difference o
signals s<
Greenwich.
f Clocks by
snt from
Killorglin.
Means of each Exchange.
Time ot
Transmission.
Greenwich
Sidereal Time.
Difference
of Clocks.
1898.
h m
m H
Ill S
h m
m s
s
Nov. 5
23 43'4 13
39 2-064
23 487 26
39 2-180
23 48-4
39 2-117
0-064
23 5 2 '5
13
39 2-045
i 527
16
39 I- 72
i 56-5
3
39 '789
I 56-2
39 '74 6
0-044
i 59*5
4
39 r 72
Nov. 6
23 30-9
>7
38 57-099
23 37'5
25
38 57-161
23 37*i
38 57-121
0-041
23 42-0
'9
38 57-063
Nov. 8
23 5>'3
22
38 46-927
23 59'8
35
38 47-018
23 58-1
38 46-972
0-051
3'3
16
38 46-925
2 19*+
'4
3 8 46-535
2 24-4
27
38 46-614
2 24-7
38 46-567
0-047
2 29'I
18
38 46-506
Nov. 9
O 22'4
20
38 42-216
o 26-9
3
38 42-295
o 27-0
38 42-246
0-050
o 30-9
16
38 42-175
I 36-6
18
38 41-956
I 41-4
26
38 42-020
I 41-5
38 4I-978
0-042
' 45*9
20
38 41-917
Nov. 10
o 19-8
'9
38 37-121
o 24-5
26
38 37-216
o 24-1
38 37-i6i
0-056
o 27-6
'9
38 37-090
2 45-1
17
38 36-599
2 49' 2
27
38 36-697
2 48-8
38 36-642
0-056
2 SI'S
17
38 36-574
Nov. 1 1
2 2 I -4
15
38 31-522
2 38-5
15
38 3i'554
2 35'3
38 3i-5'9
0-046
2 44-1
'3
38 3 ' '443
Nov. 1 2
o 7-8
'9
38 26-976
o 10-5
33
38 27-051
O 10- 1
38 27-011
0-041
I2'I
15
38 26-963
Nov. 1 3
O I I '2
18
38 22-564
o i6'o
26
38 22-643
o 16-2
38 22-596
0-047
o 217
'7
38 22-531
EXCHANGES OF SIGNALS.
183
Difference of Sidereal Standard and Orahnm 2 found by Signals sent from
Greenwich and Killorglin continued.
Date.
Greenwich
Sidereal
Time.
Number
. of
Signals.
Difference o
signals 5
Greenwich.
f Clocks by
ent from
Killorglin.
Means of each Exchange.
Time of
Transmission.
Greenwich
Sidereal Time.
Difference
of Clocks.
1898.
Nov. 1 3
h 111
2 30-1 16
2 34'i 37
2 367 13
m s
38 22-213
38 22-192
m s
38 22-298
h m
2 33-6
m s
38 22-251
s
0-048
Nov. 1 5
o 17-2 18 39 12-670
o 23-6 22
o 27-9 16 39 ' i2'62i
39 12-748
o 23-0
39 12-698
0-048
Nov. 1 6
o 17-4 17 39 6-961
o 22-6 39
o 28-8 20 39 6-926
39 7-039
o 23-1
39 6 '99'
0-048
2 2 2 "9
2 28-8
2 33'9
16 39 6-486
43
16 39 6-436
39 6 '594
2 28-6
39 6-528
0-067
Nov. 17
o 27-3
o 31-2
o 35-0
>3
34
16
39 ''4 6 5
39 1- 443
39 "'573
o 31-4
39 r 5i3
O-o6o
2 2IM
2 25 - 6
2 30-8
18
35
21
39 1-074
39 1-042
39 1-163
2 26-O
39 mo
0-052
NOY. 1 8
21'6
o 25-4
o 28-9
18
39
zo
38 5 6 '34
38 56-314
38 5 6 '435
o 25-4
38 56-381
0-054
2 8-7
2 i3'5
2 l6'4
17
32
15
38 55-966
3 8 55'93*
38 56-044
2 I2'9
38 55'997
0-049
Nov. 1 9
o 50-5
o 53-6
o 58-2
20
29
'9
38 51-276
38 51-248
38 51-362
o 53-9
38 5''3i2
0-049
Nov. 20
I 9-5
I 12-4
I 15-5
15
32
16
38 45-967
38 45-944
38 46-086
I I2- 4
38 46-021
0-065
Nov. 2 1
o 34-6
45'3
o 49-2
20
39
18
38 41-024
38 40-964
38 41-090
o 43-4
38 4>'43
0-054
2 6-5
2 lO'O
2 13-2
18
27
15
38 40-714
38 40-684
38 4797
2 lO'I
38 4074 8
0-049
184 TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH- KILLORGLIN, 1898.
Difference of Sidereal Standard and Graham 2 found by Signals sent from
Greenwich and Killort/lin continued.
Difference of Clocks by
Means of each Exchange.
Date.
Greenwich
Sidereal
Time.
Number
of
Signals.
signals s
Greenwich.
ent from
Killorgliu.
Time of
Transmission.
Greenwich
Sidereal Time.
Difference
of Clocks.
1898.
h in
m s
m s
|
h in m s
s
NOV. 22
o 44'6
'5
38 36-188
o 53-3
36
38 36-268
o 52-0
38 36-220
0-053
o 56-2
16
38 36-156
Nov. 23
o 57-8
1 1
38 30-441
i 2-9
30
38 30-S33
i 37
3 8 30-477
0-054
i 8-0
20 38 30-408
Nov. 24
o 52-0
20 38 25-068
o 56-0
36
38 25'"39
o 55-8
38 25-097
0-043
o 59-0
20 ] 38 25-041
Nov. 2 5
i 4-9
16
38 19-507
' I3-4
25
38 19-568
i 12-8
38 19-520
0-049
i 20- 1
'5
3 8 '9'437
Nov. 26
o 56-8
16
38 13-961
7-6
26
S 8 I3-995
i 6'9
38 13-961
0-039
H'5
14
38 13-889
Nov. 27
2 '5
16
38 8-472
7-0
36
38 8-536
i 7-0
38 8-493
0-043
11 3
'7
38 8-429
4 13-8
18
38 7765
4 17-3
3i
38 7-859
4 17-2
38 7-808
0-052
4 20-4
16
38 7747
Nov. 28
i 8-5
'9
38 3-386
i 11-5
34
38 3'475
i 1 1-6
38 3-426
0-049
i 15-2
18
38 3-365
Mean
0-049
RESULTING VALUES FOR DIFFERENCE OF LONGITUDE. 185
XVII. RESULTING VALUES FOR DIFFERENCE OF LONGITUDE.
The following Table shows the individual values of the difference of longitude
resulting from the observations of each night when clock error was determined both at
Greenwich and Killorglin. The first three columns require no explanation. Column 5
gives the difference of the clocks as found by the signals at the times given in Column 1,
which is taken from the table on pp. 179-184, or is found by taking the simple mean of
the results in cases when there were two exchanges of signals on one night. Column 4
gives the error of the Sidereal Standard at the same time, found by applying the rates
given on p. 178 to the error shown on pp. 17J/.-177. Column 6 gives similarly the error
of Graham 2. From columns 4, 5 and 6, the value of the difference of longitude
uncorrected for personal equation of the observers is deduced, and is given in Column 7.
In general the determinations depend on clock errors found from three or more
groups of stars at both stations. To each such determination, or in the cases when only
two groups were observed at one station, a weight of 2 has been assigned. To the
determinations on October 18 and November 17 a weight unity is given, because the
clock errors at Killorglin and Greenwich respectively depend on one group of stars
only. To the determination on November 5 a weight unity has been given, because
it appears from the table on p. 173 that there is some unexplained abnormal error in
the observations on this night.
186 TELEGRAPHIC DETERMINATION OF LONGITUDE, GREENWICH-KILLORGLIN, 1898.
Observer at
Difference of
Difference of
Date and Greenwich
Sidereal Time.
4
.5
f
Greenwich
Clock
Slow.
Difference of
Clocks by
Signals.
Killorglin
Clock Slow.
Longitude un-
corrected for
Personal
M
be
'3
te
Longitude
corrected for
Personal
Difference
from Mean.
i
Equation.
r*
Equation.
3
PART I.
1898. d h m s
in s
m s
Ill S S
Oct. II 215
H.
I).
+ 0-15
38 46-82
-22-81
39 9-78
2
39 io'02
+ 0-19
18 o 18
) >
j '
- 1*43
39 38-98
+ 27-97
39 9'5 8
I
39 9' 8z
O'OI
22 l6
) 1
J
- 2-16
39 20-68
+ 8-97
39 9'55
2
39 979
0-04
23 o 54
) )
)
- 2-33
39 H'36
+ 2' 5 !
39 9'5*
2
39 9-76
0-07
Mean
39 9' 6 >
PART II.
Oct. 28 2 2 D.
H. - 2-93
38 43-58
-29-48
39 I0 ''3 2
39 9-89
+ 0-06
3' o 38
- 3'6-
38 26-91
-46-88
39 10-12
2
39 9'88
+ 0-05
Nov. 3 o 44 , ,
)
- 4-, 6
39 10 78
- 3'43
39 IO- 5
2
39 9' 81
O-02
5 o 52
) )
4-62
39 ''93
-12-54
39 9' 8 5
I
39 9' 6 '
O-22
io i 37
) i
- 5'45
38 36-90
-38-51
39 9'9 6
2
39 972
- O'l I
13 i 25
) J
- 5-98
38 22-42
-5373
39 10-17
2
39 9'93
+ o-io
Mean
39 10-06
PART III.
Nov. 17 i 29 H.
D.
- 6-59
39 '3i
15-08
39 9' 8
I
39 10-04
+ 0'2I
18 i 19
1 )
> >
7-06
38 56-19
-20-38
39 9'5i
2
39 975
0'08
27 2 42
> }
>
- 9-09
38 8-15
-70-41
39 9'47
2
39 97i
0-12
Mean
39 9'55
RESULTING VALUES FOR DIFFERENCE OF LONGITUDE. 187
The weighted mean of results of Parts I. and III. = 39 m 9 8 '59,
Part II. =39 m 10 S '06,
therefore the difference of personal equation between Mr. Dyson and Mr. Hollis = B> 24.
This value of the personal equation has been applied with the appropriate sign
to the figures iu Column 7 of the above table to find Differences of Longitude corrected
for Personal Equation between the observing piers, the weighted mean of which is
39 m 9 s- 83. The differences of each determination from this, shown in the last column,
give a probable error of the result S '023.
The observing pier at Greenwich is 8 '02 west of the Transit Circle, so that finally
the longitude of the Ordnance Survey Mark at Ballymacprier is
39 m 9 9> 85 O s< 023 West
of the Transit Circle at Greenwich.
LONGITUDE PARIS - GREENWICH, 1888. ?u*. i.
Observing room/ at Greenwich/.
N
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s
GROUND PLAN
Shutter
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Section, through, JFrcme Iferticab.
SOUTH ELEVATION
EAST ELEVATION
E .Weller 4 Grahams. U d Litho. London.
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LONGITUDE PARIS- GREENWICH, 1888.
Observing rvoTn/ at> Montsonri-s -
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GROUND PLAN
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SOUTH ELEVATION.
through. Meridian/
EAST ELEVATION.
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Plate VI.
ROYAL OBSERVATORY, GREENWICH.
PLAN OF THE FRONT COURT.
Zylinski s
CU Transit.
1664.
TV nta^esC pmx) to Hie Transit Pttr pf
HyH WaltrH*r*. , n BALLI HSKELL1GS
BAY <J aJ}f>u2 a t/imrffr of u !':..< distant
PLAN
OF THE PROPERTY Of THE
COMMERCIAL CABLE COMPANY
AT WATERVILLE. Co. KERRY,
Haw.M
INI ASITION ,,<n TRANSIT RER.
LONGITUDE. GREENWICH -WATERVILLE-CANSO- MONTREAL. 1892.
PLAN
OFA PORTION OF
Me GILL COLLEGE GROUNDS
MONTREAL
SHOWING POSITION OF
TRANSIT HOUSE AND PIER
1
r ;
PLAN
OFA PORTION OF THE PROPERTY
OF THE
COMMERCIAL CABLE COMPANY
T HAZEL HILL Norn SCOTIA
SHOWING
[THE FbsmoN OF THE TRANSIT PlLR
SCAlt FRtT
/f.S/DNCS Of rue ST/>ff
J
STATION I *S
Ro.o TO CH60
WellerSGraham.L^ Litiio. London.
UNIVERSITY OF CALIFORNIA LIBRARY
BERKELEY
Return to desk from which borrowed.
This book is DUE on the last date stamped below.
ASTRGNDMY LIBRARY
LD 21-100m-ll,'49(B7146sl6)476
701226
UNIVERSITY OF CALIFORNIA LIBRARY
ROYAL OBSERVATORY, GREENWICH.
DETERMINATIONS OF
(
LONGITUDE.
1888-1902.