-NRLF 
 
RECOMPUTATION 
 
 OF THE 
 
 POSITION OF THE ECLIPTIC FROM OBSERVATIONS OF THE SUN, IN THE 
 
 YEARS 1877-1886, 
 
 AND 
 
 CORRECTIONS TO REFRACTION IN MERIDIAN OBSERVATIONS 
 
 OF STARS, SUN, MOON, AND PLANETS, FOR REVISED READINGS OF THE EXTERIOR 
 
 THERMOMETER, AND OF THE BAROMETER, IN THE YEARS 1877-1886, 
 
 MADE AT THE 
 
 ROYAL OBSERVATORY, GREENWICH^. 
 
 UNDER THE DIRECTION OF 
 
 W. H. M. CHRISTIE, M.A., F.R.S., 
 
 ASTRONOMER ROYAL. 
 
 (Formiti/i A/>/it'n>lix III. to the Volume of Greenwich Observations for the Year 1887.) 
 
 LONDON : 
 
 PRINTED FOR HER MAJESTY'S STATIONERY OFFICE, 
 Br DARLING k SON. LTD.. 1-3, GBKAT ST. THOMAS AI-OSTI.K. E.C. 
 
 1889. 
 
" / 
 
APPENDIX III. 
 
 ROYAL OBSERVATORY, GREENWICH. 
 
 (a) RECOIPUTATION OF THE POSITION OF THE ECLIPTIC FROM 
 
 OBSERVATIONS OF THE SUN, IN THE TEARS 1877-1886, 
 
 (b) CORRECTIONS TO REFRACTION IN MERIDIAN OBSERVATIONS 
 
 OF STARS, STJN, MOON, AND PLANETS, FOR REVISED 
 READIN&S OF THE EXTERIOR THERIOIETER, AND OF 
 THE BAROMETER, IN THE TEARS 1877-1886, 
 
 OBSBBVATJONS. 1887. 
 
 M 
 
(a) RECOMPUTATION OF THE POSITION OF THE ECLIPTIC FROM OBSERVA- 
 TIONS OF THE SUN, IN THE YEARS 1877 TO 1886. 
 
 In the. course of the Computations for the Ten -Year Catalogue it was found 
 necessary to revise the several " Investigations of the Position of the Ecliptic from 
 Ob.-ervations of the Sun " which are given in the Annual Volumes from 1877 to 1886. 
 The N.P.D.'s of the Sun therein emplovc-d are not reduced to a uniform system of 
 refraction and co-latitude. R 1) correction, and thermometer correction, and the deduced 
 quantities for correction of the position of the Ecliptic are thus not comparable inter se. 
 
 The N.P.D.'s have accordingly been corrected as follows : 
 
 (1.) Corrections have been applied in the year 1877 to reduce to co-latitude 
 38 31' 21"'9() and to Bessel's Mean Refractions of the Tabulae Regiomontanae. The 
 co-latitude used for the daily reduction of observations in 1877 was 38 31' 21"'60 
 and the refractions those of the Tabu las Regiomontanae diminished in the proportion of 
 1 : IV994G9. But in the Introduction to the Greenwich Observations for 1877, p. Ixxv. 
 it is remarked : " From the result of investigations given in an Addendum to the 
 Introduction to the Nine-Year Catalogue it appears that these refractions are too small, 
 and that the mean refractions of Bessel's Tabulae Regiomontanae do not require any 
 correction. In the year 1877, the N.P.D.'s have been corrected in the Annual Star 
 Catalogue for reduction to Bessel's Refractions of the Tabulae Regiomontanae and to the 
 corresponding co-latitude 38 31' 21"'90. , In the other sections, including the 
 planetary results, the diminished refractions have been used, the calculations being too 
 far advanced at the time of the alteration in the adopted refractions to allow of 
 corrections being applied." 
 
 (2.) Corrections have been applied to the refractions in the years 1877 and 1878 on 
 account of an index error of + 0'7 in the exterior thermometer (as determined by 
 comparisons with the standard on 1879 April 3). The thermometer readings from 
 is 7'.) January 1 had been corrected for this index error, although it might appear from 
 the Introduction to the Greenwich Observations for 1S79, p. Ixxvi., that this correction 
 had not been applied to the observations before 1879 April 3. 
 
 (3.) Corrections to eliminate the flexure correction 0" - 12 sin Z.D. applied in 1877, 
 1878 and in the first four months of 1S79 (to April 19), have been applied to the 
 N.P.D.'s. 
 
 (4.) Corrections have been applied to the N.P.D.'s in the years 1877-1882 to 
 reduce them to the same system of R D as that used in the years 1883-1886. See 
 
 Introduction to Ten- Year Catalogue, p. 11. 
 
 A 2 
 
 
(4) RECOMPUTATION OK THE POSITION OF THE ECLIPTIC FROM 
 
 The formula; for R D correction originally used in the reduction of the observations 
 in the several years are as follows : 
 
 Year. Correction to Direct Observations. 
 
 1877 ... + 0-015 + ' 2 79 s i n Z.D. COB* Z.D. 
 
 1878 ... o-oio + 0-639 sin Z.D. cos* Z.D. 
 
 1879 ... + 0-034 + '386 sin Z.D. cos* Z.D. 
 
 1880 ... + 0-068 + 0-538 sin Z.D. cos* Z.D. 
 
 1881 ... + 0-018 + 0-550 sin Z.D. 
 
 1882 ... + 0-052 + 0-436 sin Z.D. 
 
 1883 ... 0-019 + '693 sin Z.D. 
 
 1884 ... 0-026 + 0-658 sin Z.D. 
 
 1885 ... 0-018 + 0-687 sin Z.D. 
 
 1886 ... o-ooo + 0-692 sin Z.D. 
 
 In view of the close accordance of the results in the years 1883-1886, after the 
 extension of the available range of stars (consequent on the alteration in the mounting 
 of the collimators), the mean variable term for these years + 0"'692 sin Z.D. was adopted 
 for the whole ten years, the constant term peculiar to each year being retained. 
 
 (5.) Corrections have been applied to the refractions in all the years 1877-1886, 
 representing the effect of substituting readings of the thermometer in the front court 
 for those of the exterior thermometer placed near the north wall of the transit-circle 
 room. The reason for this change is explained in the following passage of the Report 
 of the Astronomer Royal to the Board of Visitors for 1887 June 4, p. (7) : "It has 
 appeared doubtful whether the reading of the exterior thermometer placed near the 
 north wall of the transit-circle room represents the true temperature of the external air 
 as affecting the refraction for the sun and other southern objects in the day-time. A 
 discussion of simultaneous readings of the exterior, front court, and meteorological 
 standard thermometers, which is being made by Mr. Thackeray, shows systematic 
 differences between the first and last at the time of observation of the sun, the mean 
 monthly excess of the meteorological standard over the exterior thermometer for the 
 ten years 1877-1886 ranging from +0'7 in December to +2 0< 1 in May and August, 
 and + 2'6 in September. The reading of the front court thermometer (which is at a 
 distance from any building) appears to agree closely with that of the meteorological 
 standard, and it has been adopted, from the beginning of this year (1887), in 
 computing refractions for the sun, moon, planets, and stars south of the zenith 
 observed in the day-time, the exterior thermometer being still used for northern stars 
 as probably representing better the temperature of the air on the north side of the 
 transit-circle. The systematic differences in thermometer readings have a sensible 
 effect on the position of the ecliptic as deduced from observations of the sun, the 
 discordance in the results between the summer and winter solstices found when the 
 readings of the exterior thermometer are used being rendered insensible when 
 corrections are applied to reduce to the reading of the meteorological standard 
 thermometer." 
 
OBSERVATIONS OF THE SUN, ix THK YKAKS 1877 TO 1886. 
 
 (5) 
 
 The corrections applied to the refractions in the years 1877-1886 represent the 
 effect on the refraction for the Z.D. of the sun on the mean day of each group 
 corresponding to the monthly mean differences between the exterior and front court 
 thermometers as found from observations made from 1887 -Inn. 1 to 1888 Sept. 30, at 
 the transit of the sun, which were the only set of observations available. 
 
 The adopted monthly mean differences were us follows : 
 
 Mouth. 
 
 January 
 
 February 
 
 March 
 
 April 
 
 May 
 
 June 
 
 Front Court Ext. 
 
 o 
 
 + 0-5 
 
 + 1-6 
 + i-5 
 
 4- 2-2 
 + 3'5 
 + 4'3 
 
 Month. 
 
 July 
 
 AugURt 
 
 September 
 October 
 November 
 December 
 
 Front Court Ext. 
 
 o 
 + 2-8 
 
 + 3'5 
 
 + 27 
 
 + 27 
 + 17 
 + I-I 
 
 In the following tables are given the various corrections to N.P.D., the corrected 
 error of X.IM)., and the deduced corrected error of E.N.P.D. These new errors have 
 been substituted in the equations already formed in the annual volumes for each year, 
 and the equations have been re-solved. In the year 1879 there was originally a mistake 
 in computation, the error in E.N.P.D. for July having been taken with the wrong 
 
 sign. 
 
 It will be convenient here to compare the original and corrected values of the 
 quantities, ,r, //. * ; mid of the correction to epoch depending on x. 
 
 
 X. 
 
 Correction to Epoch. 
 
 .'/ 
 
 - 
 
 Y.-ar. 
 
 Original 
 
 Corrected 
 
 Original 
 
 Corrected 
 
 Original 
 
 Corrected 
 
 Original 
 
 Corrected 
 
 
 Value. 
 
 Value. 
 
 Value. 
 
 Value. 
 
 Value. 
 
 Value. 
 
 Value. 
 
 Value. 
 
 I8 77 
 
 + o'35 
 
 + 0-26 
 
 + '059 
 
 M 
 
 + '4+ 
 
 // 
 
 - 0-25 
 
 + 0-36 
 
 H 
 + I-I3 
 
 - 0-15 
 
 1878 
 
 O'2I 
 
 0-29 
 
 - -035 
 
 - '49 
 
 + 0-23 
 
 + 0-52 
 
 + 0-31 
 
 4- 0-09 
 
 I8 79 
 
 + 0-43 
 
 + 0-15 
 
 + -072 
 
 + '025 
 
 O'OO 
 
 + 0-26 
 
 + 0-42 
 
 4- 0-40 
 
 1880 
 
 0^46 
 
 - 0'55 
 
 - '77 
 
 -092 
 
 0-08 
 
 + 0-05 
 
 o - o3 
 
 0-07 
 
 .1881 
 
 O'll 
 
 O'2I 
 
 '019 
 
 - '35 
 
 + 0-13 
 
 4- 0-06 
 
 4- 0-03 
 
 + 0-26 
 
 1882 
 
 0-08 
 
 0-16 
 
 - -014 
 
 - -027 
 
 + 0-48 
 
 + 0-42 
 
 + 0-38 
 
 + - 53 
 
 1883 
 
 + 0-07 
 
 o'oi ; 
 
 + 'OI2 
 
 'OO2 
 
 + O'22 
 
 + O'lO 
 
 O'22 
 
 4- 0'12 
 
 1884 
 
 + 0-58 + 0-,0 
 
 + '096 
 
 + -084 
 
 + '45 
 
 + o'34 
 
 O'5O 
 
 0-18 
 
 1885 
 
 + o'oi 0-05 
 
 + 'OO2 
 
 '009 
 
 + 075 
 
 4- 0-65 
 
 - 0'45 
 
 0'12 
 
 1886 
 
 + 0-6; + 0-56 
 
 + '109 
 
 + -94 ! 
 
 + 0-46 
 
 + '35 
 
 - 0-13 
 
 4- 0'20 
 
 Mciin ... 
 
 4- o'i2 : + 0-02 
 
 4- '021 
 
 + -003 
 
 + 0-24 
 
 + 0-31 
 
 + 0-09 
 
 4- o'n 
 
 It will be noticed that the values of z in the years 1879 and 1882 are somewhat 
 large. There is evidence that these discrepancies are due to changes in the staff' of 
 regular observers in those years. 
 
RECOMPUTATION OF THE POSITION OF THE ECLIPTIC FROM 
 
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OBSERVATIONS OF THE SUN, IN THE YEAUS 1877 TO 1886. 
 
 (7) 
 
 Equations formed by assuming the Error in Ecliptic North Polar Distance to be 
 represented by the Formula 
 
 x x cos Sun's longitude + y x sin Sun's longitude + 2, 
 
 and altering the number of observations so as to make the assumed weights of opposite 
 parts of the year equal : 
 
 {+ 0-30 = + 0-4628 x x 0-8865 * y + z Weight 7 
 - 0-37 = + 0-8746 x x - 0-4848 x y + z ,, 4 
 0-93 = + 0-9976 x x 0-0692 x y + 2 , , 5 
 
 Summer 
 
 ( + 0-16 = + o- 
 
 ...-< + 0-21 = + O- 
 
 ( + 0-43 = + o- 
 
 Winter 
 
 8347 x x + 0-5507 x y + 2 
 5913 x x + 0-8064 x y + z 
 0640 x x + 0-9980 x y + 2 
 
 ! 0-21 = 
 0-44 = 
 + 0-07 = 
 
 f- 0-24 = 
 
 ...j- 0-45 = 
 
 ( - 073 = 
 
 0-4065 x x + 0-9137 x y + z 
 
 0-8524 x x + 0-5228 x y + z 
 
 0-9870 x j- + 0-1605 x y + z 
 
 - 0-8893 x x 0-4573 x y + z 
 
 0-6 1 20 x x 0-7908 x y + z 
 
 0-0213 x a- 0-9998 x y + z 
 
 ^ 
 
 4 
 10 
 
 7 
 5 
 
 4 
 
 6 
 5 
 
 5 
 
 Spring 
 
 Autumn 
 
 Equations multiplied by the Weights : 
 
 !+ 2-10 = + 3- 
 - 1-48 = + 3' 
 - 4-65 = + 4- 
 
 2396 x x 6-2055 x y + 7? 
 
 4984 x x - 1-9392 x y + 42 
 9880 x x 0-3460 x y + 52 
 
 !+ 0-32 = + 1-6694 x x + 1-1014 x y + 2 z 
 + 0-84 = + 2-3652 x x + 3-2256 x y + 42 
 + 4-30 = + 0-6400 x x + 9-9800 x y + 10 2 
 
 !- 1-47 = - 2- 
 - 2-20 = - 4 - 
 + 0-28 = 3- 
 
 = - 2-8455 x x + 6-3959 x y + 7.z 
 4-2620 x x + 2-6140 x y + 52 
 9480 x x + 0-6420 x y + 40 
 
 
 - 1-44 = - 5-3358 
 
 2-25 = 3-0600 
 
 3-65 = 0-1065 
 
 x .r - 2-7438 x y + 62 
 x x 3-9540 x y + 52 
 x x 4'999 x y + 5 z 
 
(8) RECOMPUTATION OF THE POSITION OF THE ECLIPTIC FROM 
 
 New Equations formed by adding and subtracting those above, as indicated below : 
 
 Spring + Summer + Autumn + Winter 
 - 9"- 3 o = 3-1572 x x + 37714 x y + 642 
 
 Spring + Summer Autumn Winter 
 + 12-16 = + 35-9584 x x + 7-8612 x y 
 
 Spring Summer Autumn + Winter 
 13-44 = + 9-6046 x x 44-1464 x y 
 
 Solution of these Equations : 
 
 x = + 0-26 
 y = + 0-36 
 z = 0-15 
 
 The first term, taken alone, indicates that, at the first point of Aries, the error ol 
 tabular Ecliptic N.P.D. is positive, or that the assumed Ecliptic is south of the 
 Sun's true path by 0"'26, and therefore that the right ascensions of all stars ought to be 
 
 O-260 
 
 increased by - - = 8< 044. 
 
 J 15 x sin 23. 27' 
 
 The second term, taken alone, indicates that the obliquity assumed in the Nautical 
 Almanac ought to be increased by 0"'36. 
 
 The third term indicates that the obliquity deduced from the southern solstice is 
 greater than that deduced from the northern solstice by 0"'30 ; or that the mean of the 
 observed distances from the Pole to the Ecliptic is too great by 0"'15. 
 
OBSERVATIONS OF THE SUN, IN THE Vi:AHS 1877 TO 1886. 
 
 (9) 
 
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 GBEENWICH OBSBBVATIONS, 1887. 
 
(10) 
 
 RECOMPUTATION OF THE POSITION OF THE ECLIPTIC FROM 
 
 Equations formed by assuming the Error in Ecliptic North Polar Distance to be 
 represented by the Formula 
 
 x x cos Sun's longitude + y x sin Sun's longitude + z, 
 
 and altering the number of observations so as to make the assumed weights of opposite 
 parts of the year equal : 
 
 ! 0-58 = + 0*4746 x x 0-8802 x y + 2 Weight 8 
 0-03 = + 07953 x x 0-6062 x y + z ,, 10 
 0-68 = + 0-9898 x x 0-1423 x y + z ,, 7 
 
 !+ o-oi = + 0-8884 x x + 0-4592 x y + z 
 + o-ii = + 0-5809 x x + 0-8139 x y + z 
 + 0-73 = 0-0151 x x + 0-9999 x y + z 
 
 9 
 
 6 
 
 10 
 
 Autumn ... 
 
 Winter ... 
 
 0-4480 x x + 0-8940 x y + 2 ,, 8 
 
 0-7932 x .T + 0-6090 x y + z , , 8 
 
 0-9767 x a; + 0-2145 x y + z ,, 9 
 
 0-9137 xx 0-4065 x y + z ,, 9 
 
 0-5873 x x 0-8094 x y + z ,, 9 
 
 x x - 0-9934 x y + z ,, 7 
 
 Equations multiplied by the Weights : 
 
 Spring 
 
 Summer... 
 
 + 3-7968 x x 7-0416 x y + % z 
 + 7'953 x x 6-0620 x y + 102 
 + 6-9286 x x 0-9961 x y + 7 z 
 
 + 7-9956 x x + 4-1328 x y + 9 z 
 + 3-4854 x x + 4-8834 x y + 6s 
 0-1510 x x + 9-9990 x y + 102 
 
 Autumn ... 
 
 Winter ... 
 
 3-5840 x x + 7-1520 x y + 80 
 
 6-3456 x x + 4-8720 x y + 8 z 
 
 8-7903 x x + 1-9305 x y + 92 
 
 8-2233 x x 3*6585 x y + 92 
 
 5-2857 x x 7-2846 x y + 92 
 
 0-8008 x x 6-9538 x y + 7 z 
 
OBSERVATIONS OP THE SUN, IN THE YEAHS 1877 TO 1886. (11) 
 
 Xe\v Equations formed by adding and subtracting those above, as indicated below : 
 
 Spring 4- Summer + Autumn + Winter 
 + io' - 57 = 3-0213 x x + 0-9731 x y + 100 z 
 
 Spring + Summer Autumn Winter 
 - i3"-87 = + 63-0381 x x + 8-8579 x y 
 
 Spring Summer Autumn + Winter 
 37*'27 = + "7585 xx 64-9663 x y 
 
 Solution of these Equations : 
 
 f 
 x = 0-29 
 
 y = + 0-52 
 
 2 = 4- 0-09 
 
 The first term, taken alone, indicates that, at the first point of Aries, the Error of 
 the tabular Ecliptic N.P.D. is negative, or that the assumed Ecliptic is north of the 
 Sun's true path, by 0"'29, and therefore that the right ascensions of all stars ought to 
 
 0"-29 
 be diminished by 15 x 8in '^ 2? , = 0"049. 
 
 The second term, taken alone, indicates that the obliquity assumed in the 
 Nautical Almanac ought to be increased by 0"'52. 
 
 The third term indicates that the obliquity deduced from the southern solstice is less 
 than that deduced from the northern solstice by 0"'18 ; or that the mean of observed 
 distances from the Pole to the Ecliptic is too small by 0"'09. 
 
 n 2 
 
(12) 
 
 RECOMPUTATION OF THK POSITION OF THE ECLIPTIC FROM 
 
 -*J . 
 
 Ill 
 
 a o s3 
 
 ifi m -H-t-ioo r^r^i^oo iv, *o 
 
 - b - b b b '- b - b b 
 
 b 
 
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 1 1 + 1 1 1 1 1 + 1 1 
 
 + 
 
 Iflfi 
 
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 m 
 
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 ga . 
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 + +I+ + + + +I+ + 
 
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OBSKRVATIONS OF THE SUN, IN THE YEARS 1877 TO 1886. 
 
 (18) 
 
 Equations formed by assuming the Error in Ecliptic North Polar Distance to be 
 represented by the Formula 
 
 j- x cos Sun's longitude -f y x sin Sun's longitude + z, 
 
 :i!id altering the number of observations BO as to make the assumed weights of opposite 
 parts of the year equal : 
 
 + 1-34 = + 0-2560 x x 0-9667 x y + z Weight 4 
 + 1-02 = + 0-8790 x x 0-4769 x y + s ,, 4 
 
 0-61 = + 0-9970 x x 0-0776 x y + z 
 
 ii 
 
 Summer ... 
 
 Autumn ... 
 
 Winter ... 
 
 -f 072 = + 0-9729 x x + 0-2312 x y + z ,, 5 
 + 0-88 = + 0-5979 x x + 0-8016 x y + 2 ,, 8 
 + 1-25 = + 0-1216 x x + 0-9926 x y + 2 ,, 6 
 
 0-6004 x x + o'7997 x y + 2 , , 2 
 
 0-7802 x x + 0-6255 x y + 2 ,, 10 
 
 0-9949 x x + o-ioii x y + 2 ,, 7 
 
 0-9467 x x 0-3220 x y + 2 ,, 6 
 
 0-5618 x x 0-8272 x y + 2 ,, 8 
 
 0-2062 x x 0-9785 x y + 2 , , 5 
 
 Equations multiplied by the Weights : 
 
 Spring 
 
 Summer... 
 
 + 5-36 = + 1-0240 x x 3-8668 x y + 42 
 + 4-08 = + 3-5160 x x 1-9076 x y + \z 
 6-71 = +10-9670 x x 0-8536 x y + 112 
 
 f + 3-60 = + 4-86 
 | + 7-04 = + 4-78 
 ( + 7-50 = + 0-72 
 
 + 3-60 = + 4-8645 x x + 1-1560 x y + 52 
 .-7832 x x + 6-4128 x y + % z 
 7296 x x + 5-9556 x y + 6 z 
 
 \ 
 
 Autumn ... 
 
 Winter 
 
 I-2008 X X + I"5994 X IJ + 2 Z 
 
 7-8020 x j- + 6-2550 x y + 10 z 
 
 6-9643 x x + 0-7077 x y + 7 z 
 
 5-6802 x x 1-9320 x y + 6 z 
 
 4-4944 x x 6-6176 x y + 82 
 
 1-0310 x x 4-8925 x y + 52 
 
(14) RECOMPUTATION OF THE POSITION OF THE ECLIPTIC FROM 
 
 New Equations formed by adding and subtracting those above, as indicated below : 
 
 Spring + Summer + Autumn + Winter 
 + 3o"'96 = rz884 x x + 2-0164 x y + 76 z 
 
 Spring + Summer Autumn Winter 
 + 10*78 = + 53'57 x x + 117764 x y 
 
 Spring Summer Autumn + Winter 
 9" - 48 = + 9-8912 x x 42-1566 x y 
 
 Solution of these Equations : 
 
 t 
 
 x = + 0-15 
 
 y = + 0-26 
 z = + 0-40 
 
 The first term, taken alone, indicates that, at the first point of Aries, the Error of the 
 tabular Ecliptic N.P.D. is positive, or that the assumed Ecliptic is south of the Sun's 
 true path, by 0"'15, and therefore that the right ascensions of all stars ought to be 
 
 8- 15 
 
 increased by - -r=-, = 8 '025. 
 
 J lo x sin 26 . 27 
 
 The second term, taken alone, indicates that the obliquity assumed in the Nautical 
 Almanac ought to be increased by /- 26. 
 
 The third term indicates the obliquity deduced from the southern solstice is less 
 than that deduced from the northern solstice by 0"'80 ; or that the mean of 
 observed distances from the Pole to the Ecliptic is too small by O'^-iO. 
 
OBSERVATIONS OF THE SUN, IN TIIE YEARS 1877 TO 1886. 
 
 (75) 
 
 c-S 
 
 
 
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 ||| 
 
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 + 
 
 1 
 
 + 
 
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 + 1 + + + 1 1 
 
 8 so 
 
 
 o 
 
 M 
 
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 M OO \O C^ H ^O OO 
 
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 -h 
 
 
 O 
 
 
 
 u- so O ** N ^*- 
 
 G"^ 
 
 
 
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 1 + 1 + + + + 
 
 ^ ~ . 
 
 NO 
 
 -*- 
 
 
 00 
 
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 N t^. ON OO N ^ t> 
 in t^. N NO + tx \O 
 
 
 b 
 
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 1 + + +.+ + + 
 
 
 
 
 
 
 
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 62 
 
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(16) 
 
 RECOMPUTATION OF THE POSITION OF THE ECLIPTIC IBOM 
 
 Equations formed by assuming the Error in Ecliptic North Polar Distance to be 
 represented by the Formula 
 
 x x cos Sun's longitude + y x sin Sun's longitude + z, 
 
 and altering the number of observations so as to make the assumed weights of opposite 
 parts of the year equal : 
 
 ( 0-45 = + 0-5284 x x 0-8490 x y + z Weight 9 
 
 Spring < o-io = + 0-8215 x x ~ 0-5702 x y + z ^ 
 
 ( ro2 = + 0-9996 x x 0-0297 x y + z ,, 12 
 
 ? o-og = + 0-8505 x x + 0-5260 x y + z ,, 9 
 
 o-oi = + 0-5459 x x + 0-8379 x y + z > io 
 
 0-52 = 0-0073 x *' + i 'oooo x y + z ,, io 
 
 ( + 0-68 = 0-4260 x oc + 0-9047 x y + 2 , , 1 1 
 
 Autumn ...-J 0-06 = 0-8635 x x + '543 x y + 2 ,, 8 
 
 ' + 0-19 = 0-9961 x x + 0-0880 x y + z ,, io 
 
 !+ 0-12 = 0-9238 x x 0-3830 x y + z , , 9 
 
 + 0-26 = 0-6359 x x 0-7718 x y + z ,, 12 
 
 + 0-48 = - 0-1579 x x - 0-9875 x y + z ,, 8 
 
 Equations multiplied by the Weights : 
 
 ! 4-05 = + 4-7556 x x 7-6410 x y + 92 
 0-80 = + 6-5720 x x 4-5616 x y + 82 
 12-24 = + 11-9952 x x 0-3564 x y + 12 2 
 
 ! 0-8 1 = + 7-6545 x x + 4734 x 1 J + 9 z 
 o-io = + 5-4590 x x + 8-3790 x y + 102 
 5-20 = 0-0730 x x + 10-0000 x y + io z 
 
 
 
 4-6860 x x + 9-9517 x y + ii z 
 
 6-9080 x x + 4-0344 x y + 8 z 
 
 9-9610 x x + 0-8800 x y + io z 
 
 8-3142 x x 3-4470 x y + 9 z 
 
 7-6308 x x 9-2616 x y + 12 z 
 
 1-2632 x x 7-9000 x y + 8 z 
 
OBSERVATIONS OK THE SUN, IN THE YEARS 1877 TO 1886. (17} 
 
 New Equations formed by adding and subtracting those above, as indicated below : 
 
 Spring + Summer + Autumn + Winter 
 6"-26 = 2-3999 x x + 4-81 15 x / + 1162 
 
 Spring + Summer Autumn Winter 
 - 4o"-i4 = + 75-1265 x a- + 16-2965 x y 
 
 Spring Summer Autumn + Winter 
 n"-84 = + 14-6291 x x 71-1467 x y 
 
 Solution of these Equations : 
 
 
 
 x= - 0-55 
 
 y = + 0-05 
 Z = - 0-07 
 
 The first term, taken alone, indicates that, at the first point of Aries, the Error of the 
 tabular Ecliptic N.P.D. is negative, or the assumed Ecliptic is north of the Sun's 
 true path, by 0"'55, and therefore that the right ascensions of all stars ought to be 
 
 O s "55 
 15 x sin 23. 21' = 
 
 The second term, taken alone, indicates that the obliquity assumed in the Nautical 
 Almanac ought to be increased by 0"'05. 
 
 The third term indicates that the obliquity deduced from the southern solstice is 
 greater than that deduced from the northern solstice by 0"'14 ; or that the mean of 
 observed distances from the Pole to the Ecliptic is too great by 0"'07. 
 
 OBSERVATIONS. 1887. 
 
RECOMPUTATION OF THE POSITION OF THE ECLIPTIC FROM 
 
 I'M 
 
 w* SO SO OO L*1 i SO 
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 -^- to M o 
 
 o" 
 
 
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 1 + + + 1 1 1 
 
 + + 1 + 
 
 1 
 
 "S fl . 
 
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 tn tr\ >f N so o 
 
 N SO K-> * 
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 Os 
 
 ;2 l pk' 
 
 = o o b b b b ~ 
 
 0000 
 
 O 
 
 a H l* 
 
 + 1 1 1 + + + 
 
 1 + + + 
 
 + 
 
 "8 a 
 
 ^t~ OS OS N O OS VTN 
 
 N -^ m N 
 
 
 o O 
 
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 N -<J- OS m 
 
 f*^ 
 
 Ste 
 
 b b b b b b "- 
 
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 0000 
 
 o 
 
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 i i i i , i , 
 
 
 
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 Q 
 
OBSERVATIONS OF THE SUN, IN THE VEAKS 1877 TO 1886. 
 
 (19) 
 
 Equations formed by assuming the Error in Ecliptic North Polar Distance to be 
 represented by the Formula 
 
 x x cos Sun's longitude + y x sin Sun's longitude + z, 
 
 and altering the number of observations so as to make the assumed weights of opposite 
 parts of the year equal : 
 
 Spring 
 
 Autumn 
 
 Winter 
 
 + 0-3990 x x 0-9169 x y + z Weight 8 
 + 0-8914 x x - 0-4532 x y + z ,, 5 
 + 0-9994 x x 0-0340 x y + z ,, 10 
 
 !- 0-19 = + 0-9158 x x + 0-4017 x y + z 
 + 0-24 = + 0-5495 x x + 0-8355 x y + z 
 + 0-61 = + 0-0967 x x + 0-9953 x y + z 
 
 (+ 1-05 = - 
 
 ... < O'O2 = 
 
 ( + 0-16 = - 
 
 !+ 0-53 = - 
 + 0-24 = - 
 + 0-29 = - 
 
 0-3453 x x + 0-9385 x y + z 
 0-7958 x x + 0-6055 x y + z 
 0-9972 x x + 0-0753 x y + z 
 
 0-8890 x x 0-4579 x y + z 
 0-5544 x a? 0-8323 x y + z 
 0-1094 x x '994 x y + 2 
 
 7 
 8 
 8 
 
 8 
 8 
 7 
 
 8 
 8 
 7 
 
 Equations multiplied by the Weights : 
 
 !+ 4'56 = + 3' 
 - 2-55 = + 4- 
 no = + 9' 
 
 Autumn 
 
 Winter ... 
 
 1920 x x 7-3352 x y + 8 z 
 4570 x x 2-2660 x y + 5 z 
 9940 x x 0-3400 x y + 10 z 
 
 ! 1-33 = + 6-4106 x x + 2-8119 x y + 7 z 
 + 1-92 = + 4-3960 x x + 6-6840 x y + $ z 
 + 4-88 = + 0-7736 x x + 7'9<5z4 x y + 8 z 
 
 !+ 8-40 = - 
 - 0-16 = - 
 + I-I2 = - 
 
 2-7624 x x + 7'5 8 x y + 8 z 
 
 6-3664 x x + 4-8440 x y + 8 z 
 
 6-9804 x x + 0-5271 x y + 7 z 
 
 7-1120 x x 3-6632 x y + 8 z 
 
 4-4352 x x 6-6584 x y + 80 
 
 0-7658 x x 6-9580 x y + 7 z 
 
(20) RECOMPUTATION OF THE POSITION OF THE ECLIPTIC FROM 
 
 New Equations formed by adding and subtracting those above, as indicated below : 
 
 Spring + Summer + Autumn + Winter 
 + Z3"'93 = + 0-8010 x x + 3-1166 x y + 92 z 
 
 Spring + Summer Autumn Winter 
 ii"-i7 = + 57-6454 x x + 11-9176 x y 
 
 Spring Summer Autumn + Winter 
 - 5"73 = + 9' 8 59 x * - 57'55 8z x V 
 
 Solution of these Equations : 
 
 X = O'ZI 
 
 y = + 0-06 
 z = + 0-26 
 
 The first term, taken alone, indicates that, at the first point of Aries, the Error of the 
 tabular Ecliptic N.P.D. is negative, or the assumed Ecliptic is north of the Sun's 
 true path, by 0"'21, and therefore that the right ascensions of all stars ought to be 
 
 2 * ,. = O s> 035. 
 
 15 
 
 The second term, taken alone, indicates that the obliquity assumed in the Nautical 
 Almanac ought to be increased by 0"'06. 
 
 The third term indicates that the obliquity deduced from the southern solstice is less 
 than that deduced from the northern solstice by 0"'52 ; or that the mean of observed 
 distances from the Pole to the Ecliptic is too small by 0"'26. 
 
OBSERVATIONS OF THE SUN, IN THE YEARS 1877 TO 1886. 
 
 (21) 
 
 1*4 
 
 UN r, _ u, ON NO -,- 
 
 * '* 
 
 O O " O 
 
 o 
 o 
 
 c. S S 
 
 5*1 
 
 1 b b b b b b b 
 
 1 1 + + 1 + 1 
 
 b b b b 
 
 o 
 
 H-2-2 
 
 to UN \o ON s - O^ N 
 
 N <*- O " O UN ~ 
 
 00 UN \O OO 
 00 t^ W M 
 
 to 
 
 8 o.2*p^ 
 
 = b b b b b - 
 
 O 
 
 o 
 
 Jll* 
 
 + + + + + + + 
 
 + + + + 
 
 + 
 
 J--ei 
 
 !** o ^H *-^> ^^ r^fc o 
 
 O -<h O N O UN N 
 
 NO tO tO t- 
 
 O O NO UN 
 
 j;. 
 
 t! 2^" 
 
 *O O O O "- O - 
 
 
 
 
 
 ow* 
 
 + + + + + + + 
 
 + + + + 
 
 + 
 
 1 
 Q oo 
 
 4 
 
 UN OO ^ NO UN \O t^^ 
 
 p - p p 1- - p 
 = b b b b b b b 
 
 t^ OO u^ *M 
 
 b b b b 
 
 + + + + 
 
 b 
 
 w Jo ^ 
 3 ill 
 
 CN O -^J- to OO OO O 
 
 e b b b b b b b 
 
 b b b b 
 
 b 
 
 oo 13 O tj 
 
 + + + + + + + 
 
 + + + + 
 
 + 
 
 | W 
 
 
 
 
 
 
 2 
 
 ^- N O t^ to N to 
 M , N M M M M 
 
 *b b b b b b b 
 1 1 1 1 1 1 1 
 
 UN ON N * 
 
 b b b b 
 
 1 1 1 1 
 
 b 
 
 1 
 
 f*5 
 
 N t* O ON -^- - to 
 M - ON -* 
 
 b b b b b b - 
 
 ON UN oo VO 
 
 00 00 M t 
 
 b b b b 
 
 <T 
 
 b 
 
 I* 
 
 + + + + + + 
 
 + + + + 
 
 1 
 
 .s . 
 
 "NO * t^ OO 00 UN 
 
 f^ O O O t^ t* 
 
 o o o o o o o 
 
 to + r*. 
 
 o o o o 
 
 UN 
 
 O 
 
 1* 
 
 o o o o o o o 
 
 o o o o 
 
 o 
 
 H 'n 
 
 5 - r - * % 
 
 N N 00 
 
 N + ~t 
 
 t^ 
 
 *& 
 
 O -.* 6 O NO* 00 
 M O O* 1 OO t^- NO NO 
 
 t^ oo ON O 
 
 * 
 
 '* 8-i 
 
 3 NO 00 ON to 
 
 to ^ 
 
 M 
 
 f 
 
 "" ^N N to - to UN f^ 
 MM 
 
 O^ M t^-1 \f\ 
 
 ^ 
 
 
 N 00 O N OO ON NO 
 
 ^. v^\ OO NO 
 
 hn 
 
 * 
 
 
 
 s 
 
 S 1 1 1 i * 
 
 -5 W & 'S & >-) !-5 
 
 ? f ' V J 
 
 <; ae o S5 
 
 Q 
 
(**) 
 
 RECOMPUTATION OF THE POSITION OF THE ECLIPTIC FROM 
 
 Equations formed by assuming the Error in Ecliptic North Polar Distance to be 
 represented by the Formula 
 
 x x cos Sun's longitude + y x sin Sun's longitude + z, 
 
 and altering the number of observations so as to make the assumed weights of opposite 
 parts of the year equal : 
 
 )+ 0-23 = + 0-3786 x x 0-9255 x y + z Weight 6 
 + 0-45 = + 0-8642 x x 0-5033 x y + 2 ,, 8 
 + 0-06 = + i-oooo x x 0-0038 x y + z ,, 7 
 
 + o-ig = + 0-9241 x x + 0-3821 x y + z ,, 6 
 Summer ...-J + 1-09 = + 0-5388 x x + 0-8424 x y + z ,, 10 
 + 0-0343 x x + '9994 x y + z 5 
 
 Autumn ... 
 
 Winter 
 
 13 = - 
 
 0-4033 x x + 0-9151 x y + z ,, 
 
 0-7725 x x + 0-6350 x y + z ,, 5 
 
 0-9915 x x + 0-1302 x y + z ,, 8 
 
 0-9061 x x 0-4229 x y + 2 ,, 7 
 
 0-5868 x a; 0-8097 x y + ,, 9 
 
 0-1138 x # 0-9935 x y + ,, 5 
 
 Equations multiplied by the Weights : 
 
 !+ 1-38 = + 2-2716 xx 5'553 x y + 60 
 + 3-60 = + 6-9136 x x 4-0264 x y + 82 
 + 0-42 = + 7-0000 x x 0-0266 x y + j s 
 
 Summer . 
 
 Autumn 
 
 Winter 
 
 + 1-14 = + 5-5446 x x + 2-2926 x y + f> z 
 + 10*90 = + 5-3880 x x + 8-4240 x y + 10 s 
 + 2-95 = + 0-1715 x x + 4*9970 x y + $ z 
 
 -i 
 
 !+ 8-96 = - 
 
 + 4'4 = - 
 
 + 6-00 = 
 
 (+ 2-52 = - 
 
 ...-J+ 2-52 = - 
 
 ( + 0-65 = - 
 
 3-2264 x x + 7-3208 x y + 82 
 
 3-8625 x x + 3'i75 x y + 5 z 
 
 7-9320 x x + 1-0416 x y + 80 
 
 6-3427 x x 2-9603 x y + 7 z 
 
 5-2812 x x 7-2873 x y + 90 
 
 0-5690 x x 4-9675 x y + 50 
 
OBSERVATIONS OF THE SUN, IN THE YEARS 1877 TO 1886. (23) 
 
 New Equations formed by adding and subtracting those above, as indicated below : 
 
 Spring + Summer + Autumn + Winter 
 + 45"'44 = + 0-0755 x x + z- 4*99 x !/ + 8 4 * 
 
 Spring + Summer Autumn Winter 
 - 4"-66 = + 54-5031 x x + 9-7853 x y 
 
 Spring Summer Autumn + Winter 
 23"-z6 = + 7-9091 x x 52-0721 x y 
 
 Solution of these Equations : 
 
 
 x = 0-16 
 
 y = + 0-42 
 z = + 0-53 
 
 The first term, taken alone, indicates that, at the first point of Aries, the Error of the 
 tabular Ecliptic N.P.D. is negative, or that the assumed Ecliptic is north of the Sun's 
 true path, by 0"'16, and therefore that the right ascensions of all stare ought to be 
 
 15 x 23. 27- 
 \ 
 
 The second term, taken alone, indicates that the obliquity assumed in the Nautical 
 Almanac ought to be increased by 0"'42. 
 
 The third term indicates that the obliquity deduced from the southern solstice is less 
 than that deduced from the northern solstice by 1"'06 ; or that the mean of 
 observed distances from the Pole to the Ecliptic is too small by 0"'53. 
 
(24) 
 
 RECOMPUTATION OF THE POSITION OF THE ECLIPTIC FROM 
 
 1! 
 
 *"* *" 2 
 
 N is\ t^ \j~. 
 . O O 
 
 ^to,^ON--00 
 
 
 o b b b 
 
 oooooooo 
 
 III 
 
 1 + + 
 
 + 1 1 1 + + + 1 
 
 ^ fl o . 
 
 "N O O 
 
 \O t^OO t^-t^.N ^N 
 
 
 to - o N 
 
 O to in ro N O O w 
 
 Ill* 
 
 O O O O 
 
 OOOOOOOO 
 
 111*' 
 
 + 1 + + 
 
 + + + + 1 I + + 
 
 Jfc 
 
 *-*" ^^ *^ t^. 
 
 , r r* N o 
 
 oo ir\ONVO OOO toON 
 
 OtOt^VOONN 
 
 
 o o o o 
 
 oooooooo 
 
 Ji* 
 
 + 1 + 
 
 1 + + + + + + 
 
 s 
 
 . 
 
 
 9 
 
 
 
 O <n 
 
 ; 
 
 '. i 1*2 
 
 PH 
 
 
 
 
 ON O -^ to 
 
 oooo O N f-^t^^o^ 
 
 H liSS 
 
 M <^ n M 
 
 N N N*tO to "-* -o ^*- 
 
 i 111 
 
 b b b b 
 
 OOOOOOOO 
 
 
 
 
 .2 fe g 
 
 
 
 i 
 P 
 
 o o o o 
 o o o o 
 
 OOOOOOOO 
 
 oooooooo 
 
 J 
 
 b b b b 
 
 oooooooo 
 
 Is 
 
 * b b b b 
 
 vo r^- O*v ^t" t^ ON O OO 
 to O l o to to N to N 
 
 b b b b b b b b 
 
 IB 
 
 1 1 1 1 
 
 1 + + + 1 1 1 1 
 
 
 uo t^ ^- 
 
 t^~~-uoOO- 
 
 
 
 M-OVO UN-^-I^VOVO 
 
 *"* <$ 
 
 O O O O 
 
 OOOOOOOO 
 
 l, a 
 
 " O O O O 
 
 OOOOOOOO 
 
 il2 
 
 O to - o 
 
 "^K NM H* "H 
 
 O NO O I s -. t^ OO O 1 * to 
 
 _^ 
 
 ^ O ON oo 
 
 r^> ^3 r*- c*"* oo O^ O * 
 
 . 
 
 a - w ^-o 
 
 
 *" <j 
 
 
 Tj-N |- i^m^- TO ~ 
 
 3 03 
 
 " 6 to 
 
 o iA 00 OVH^ ^ur.tC. 
 
 ^o 
 
 N N N 
 
 
 1, 
 
 OO N VO *$- 
 
 O m H~ N?N ^O -H~ oo +* 
 
 r 
 
 fj rO ' 
 S 3? 
 
 Si^fi^Jl 
 
 ^H,^uQO^lQ 
 
OBSERVATIONS OF THK SUN, IN THE YKAKS 1X77 TO 1886. 
 
 (25) 
 
 Equations formed by assuming the Error in Ecliptic North Polar Distance to lx: 
 represented by the Formula 
 
 x x cos Sun's longitude + y x sin Sun's longitude + z, 
 
 and altering the number of observations so as to make the assumed weights of opposite 
 parts of the year equal : 
 
 !4- 0-35 = + 0-4713 x x 0-8820 x y 4- z Weight 6 
 
 - o-io = 4- 0-8037 x # '595< x II + ~ 8 
 
 + 0-03 = 4 0-9970 x .r 0-0770 x y + z ,, 10 
 
 ( + 0-20 = + 0-9122 x J- + 0-4097 x y 4- z ,, 
 
 Summer ...< 4 0-06 = 4 0-5135 x x + 0-8581 x y + * ,, 10 
 
 ( 4- 0-35 = 4- 0-1377 x x + 0-9905 x y 4- z ,, 6 
 
 ! + 0-58 = 0-5180 x x + 0-8554 x y 4- 2 ,, 5 
 
 4- 0-37 = - 0-8302 x x 4- 0-5575 x y 4- z ,, 10 
 
 _ 0-27 = - 0-9931 x x 4- 0-1175 x y + s 9 
 
 !- 0-02 = 0-9348 x x 0-3551 x y 4- z ,, 7 
 
 4- 0-04 = - 0-5616 x x - 0-8274 x V + z t " 
 
 4- 0-12 = 0-1882 x x 0-9821 x y + z ,, 6 
 
 Equations multiplied by the Weights : 
 
 !+ 2-10 = + 2-8278 x x 5-2920 x y + 6z 
 0-80 = + 6-4296 x x 4-7608 x y 4- 8 .? 
 + 0-30 = + 9-9700 x jc 0-7700 x y + 10 f 
 
 ( + 1-60 = + 7^2976 x x + 3-2776 x y + 8 z 
 
 Summer...-! + 0-60 = + 5 -I 35 x x + 8-5810 x y + 10 z 
 
 ( + no = + 0-8262 x x + 5'943o x y 4- 6 z 
 
 !4- 2-9 
 + 37 
 - 2-43 
 
 !- 0-14 
 4- 0-44 
 + 072 
 GBEESWICH OBSEBVATIONS, 1887. 
 
 2-5900 x x 4- 4*2770 x y 4- 5 * 
 
 8-3020 x x 4- 5-5750 x y + 10 z 
 
 8-9379 x a- + 1-0575 x y + <) z 
 
 6-5436 x x 2-4857 x y 4- 7 * 
 
 6-1776 x a; 9-1014 x y 4- n z 
 
 1-1292 x a: 5-8926 x y 4- 6 ^ 
 
(26) HECOMPUTATION OF THE POSITION OF THE ECLIPTIC FROM 
 
 New Equations formed by adding and subtracting those above, as indicated below : 
 
 Spring + Summer + Autumn + Winter 
 + ii'-og = 1-1941 x x + 0-4086 x y + 96 z 
 
 Spring + Summer Autumn Winter 
 + o"-ji = + 66-1665 x x + 13-5490 x y 
 
 Spring Summer Autumn + Winter 
 5"-85 = 11-9481 x x 57-0136 x y 
 
 Solution of these Equations : 
 
 
 
 X = O'OI 
 
 y = + o-io 
 
 Z = + 0-12 
 
 The first term, taken alone, indicates that, at the first point of Aries, the Error of the 
 tabular Ecliptic N.P.D. is negative, or that the assumed Ecliptic is north of the Sun's 
 true path, by 0"'01, and therefore that the right ascensions of all stars ought to be 
 
 diminished by - = 8 '002. 
 
 J 15 x sin 23. 27 
 
 The second term, taken alone, indicates that the obliquity assumed in the Nautical 
 Almanac ought to be increased by 0"'10. 
 
 The third term indicates that the obliquity deduced from the southern solstice is less 
 than that deduced from the northern solstice by 0"'24 ; or that the mean of 
 observed distances from the Pole to the Ecliptic is too small by 0"'12. 
 
OBSERVATIONS OF THE SUN, IN THE YEARS 1877 TO 1886. 
 
 (27} 
 
 *J 
 
 
 
 e*2 
 
 T- -4- 10 OC to N 
 
 OO M C^ N ^ O 
 
 2 s 
 
 l^ -*- ~ to o 
 
 r r P r . N r*~ 
 
 2-c 
 
 = b b b b b b 
 
 b b b b b b 
 
 
 1 + 1 + 1 1 
 
 i i + i + + 
 
 1-9-2 
 
 - r^ w + o oo 
 
 O vo to vo *o 
 
 
 
 - N t^. vo O O 
 
 g ;"?< 
 
 = b b b b b b 
 
 b b b b - - 
 
 JW* 
 
 + 1 + + + + 
 
 + 1 1 1 1 1 
 
 SB . 
 
 -h uo to ON 00 
 
 -d- -t- o^ i^ oo 
 
 O "" 
 
 ;** to p 5-i-i 
 
 ^ H t4 to -^- OO 
 
 o - 
 
 b b b b b b 
 
 b b b b b b 
 
 <* 
 
 + 1 + 1 + + 
 
 + + 1 1 1 1 
 
 
 vo r^ vo vo 
 
 oo O -*- -h N * 
 
 s 
 
 to N N N N 
 
 to to vo >^ ^~ 
 
 s 
 
 * b b b b b b 
 
 b b b b b b 
 
 Q " 
 
 i , , , , , 
 
 . , , , , , 
 
 pj 
 
 
 
 X 
 
 
 
 t* c ^ o 
 
 w Jel 
 
 ON O -^- to OO OO 
 ** + N N M M 
 
 N to to o i^\ -i- 
 
 5 o *> 
 
 = b b " b b b b 
 
 b b b b b b 
 
 o "i s| 
 
 + + + + + + 
 
 + + + + + + 
 
 j ^ 
 
 
 
 o 
 
 to to to N N N 
 
 N N to tO to *O 
 
 
 
 O O O O O O 
 
 o o o p p p 
 
 
 * b b b b b b 
 
 b b b b b b 
 
 pq 
 
 1 1 1 1 1 1 
 
 1 1 1 1 1 1 
 
 
 OO N H O 10 OO 
 
 vo ON 
 
 *"* Q 
 
 N 00 ~ to O 
 
 O vo Ov O N 
 
 o P* 
 
 5 b b b b b b 
 
 b b b b '- - 
 
 I* 
 
 + 1 + 1 + 1 
 
 1 1 1 1 1 1 
 
 .s 
 
 VO ON N M OO 
 N O t* N to t-t 
 
 LO OO O 10 O 
 
 * oo t^ vo to s 
 
 
 O O O O O - 
 
 p P P P r r 
 
 fc 
 
 b b b b b b 
 
 b b b b b b 
 
 H 
 
 + + + + + + 
 
 + + + + + + 
 
 "s Q ' 
 
 " - * OS JP 
 
 -* oo r*. Tt- oo 
 
 ^- N to m ft 
 
 a.* 1 " 
 
 o N tA o\ d so 
 
 oo' vo' i-^ dv lA N 
 
 BO 0., 
 
 o o^ t^* r>* so 
 
 - 
 
 
 OO N rt SO rrj M 
 
 to to 00 10 O O 
 
 *c *! 
 
 fi r^ ^~ 
 
 Tt- *- to to LO 
 
 c.<* 
 
 O N rn - to SO 
 N H N 
 
 ^ ON - to .0 
 
 & 
 
 O f~** N v^*. 00 M 
 
 vo vo vo oo ON .0 
 
 Q ^ 
 
 
 
 - co 
 
 I 5 
 
 U TM CD 
 
 ^ fl ST* 
 
 0> J5 ^ VH 
 
 "3 ^ S* "5 .2 ^ 
 
 >-5 <J 03 O X P 
 
(28) 
 
 RECOMPUTATION OF THE POSITION OF THE ECLIPTIC FROM 
 
 Equations formed by assuming the Error in Ecliptic North Polar Distance to Un- 
 represented by the Formula 
 
 x x cos Sun's longitude + y x sin Sun's longitude + z, 
 
 and altering the number of observations so as to make the assumed weights of opposite- 
 parts of the year equal : 
 
 !+ 0-51 = + 0-4985 x x o- 
 0-37 = + 0-8507 x x o- 
 + 0-42 = + 0-9911 x x o- 
 
 0-8669 x !/ + z Weight 6 
 - 0-5257 x y + z ,, 9 
 I33 1 x y + z ,, 7 
 
 {+ 0-04 = + 0-8996 x a- + 0-4368 x y + z 
 + 0-50 = + 0-5314 x x + 0-8471 x y + z 
 + 0-18 = 0-0076 x x + i -oooo x y + z 
 
 8 
 
 !+ o-io = 0-4112 x x + 0-9115 x y + z , , 7 
 
 0-26 = 0-8085 x x + 0-5885 x y + z , , 8 
 
 0-73 = 0-9945 x x + 0-1045 x y + z ,, 7 
 
 ! 0-66= 0-9023 x x 0-4310 x y + z ,, 12 
 
 roi = 0-6752 x x 0-7377 x y + z ,, 6 
 
 1-05 = 0-2787 x x 0-9604 x y + z ,, 4 
 
 Equations multiplied by the Weights : 
 
 !+ 3-06 = + 2-9910 x x 5-2014 x y + 6 z 
 
 - 3-33 = + 7-6563 xx- 4-7313 x y + 9 z 
 
 + 2-94 = + 6-9377 x x - 0-9317 x y + 7 z 
 
 ! + 0-32 = + 7-1968 x x + 3-4944 x y + 8s 
 
 + 4-00 = + 4-2512 x x + 6-7768 x y + 82 
 
 + i -08 = 0-0456 x x + 6-0000 x y + 6 z 
 
 Autumn ... 
 
 2-8784 x x + 6-3805 x y + 7 z 
 6-4680 x x + 4-7080 x y + 82 
 6-9615 x x + 0-7315 x y + 7 z 
 
 Winter ... 
 
 - 7-92 = - 
 | - 6-06 = - 
 . 4-20 = - 
 
 10-8276 x x 5-1720 x y + 12 z 
 4-0512 x x 4-4262 x y + 6 z 
 1-1148 x x 3-8416 x y + ^ z 
 
OBSERVATIONS OF THE SUN, IN THE YEAKS 1877 TO 1886. (29} 
 
 Xi:w Equations formed by adding and subtracting those above, as indicated below : 
 
 Spring + Summer + Autumn + Winter 
 i6*-6o = 3-3141 x J- + 37870 x y + 88 2 
 
 Spring + Summer Autumn Winter 
 + j2"-74 = + 61-2889 x x + 7'266 x y 
 
 Spring Summer Autumn + Winter 
 - i 4 "-42 = + 6-4969 xx- 52-3954 * y 
 
 Solution of these Equations : 
 
 n 
 
 x = + 0-50 
 y = + 0-34 
 z =. 0-18 
 
 The first terra, taken alone, indicates that, at the first point of Aries, the Error of the 
 tabular Ecliptic N.P.D. is positive, or that the assumed Ecliptic is south of the SunV 
 
 true path, by 0"'50, and therefore that the right ascensions of all stars ought to be 
 0"50 
 
 15 x sin 23. 27' = 
 
 The second term, taken alone, indicates that the obliquity assumed in the Xautirul 
 Almanac ought to be increased by 0* - 34. 
 
 The third term indicates that the obliquity deduced from the southern solstice is 
 greater than that deduced from the northern solstice by 0"'36 ; or that the mean of 
 observed distances from the Pole to the Ecliptic is too great by 0"'18. 
 
(30} 
 
 RECOMPUTATION OF THE POSITION OF THE ECLIPTIC FROM 
 
 isjj 
 
 <^ N 
 
 O ^i ^*- *O r4 -iVOOO L^CO 
 
 KB 
 
 1 O N 
 
 -J-t^N M ri- +- r^i 
 
 c o B 
 
 58 b b 
 
 b b b b b b b b b b 
 
 SS| 
 
 i i 
 
 + i + + i i + + + i 
 
 Sfl . 
 
 ON- O 
 
 OONOtONO~-lON t-^OO 
 
 "< '^3 Q 
 
 O to 
 
 
 g^p-I 
 
 c b b 
 
 b b b b b b b b - b 
 
 ,3 w w 
 
 1 1 
 
 1 + + + + + 1 1 1 1 
 
 Id 
 
 V 
 
 N ^ - OO i^H~H-N 
 
 "E Q 
 
 N ** 
 
 OON- 1 lVO^O'"-'OVOro 
 
 OpL^ 
 
 " b b 
 
 bbbbbbbbbb 
 
 w^ 
 
 1 1 
 
 i + + + + + + i i i 
 
 
 00 O 
 
 $-rooooo o N t^r^^J-NO 
 
 8 
 
 = b b 
 
 bbbbbbbbbb 
 
 O <K 
 
 , , 
 
 ,..,,i,,,i 
 
 H 
 
 
 
 f3 
 Jp] 2 a; 
 
 ON O 
 
 ^- to OO CO O N l^ t^ ^o t^ 
 
 O r ^ C 
 
 1-1 M- 
 
 N W N t4 tj to to to 10 ^ 
 
 o "o - g 
 
 a b b 
 
 bbbbbbbbbb 
 
 3 'S 2 
 
 + + 
 
 + + + + + + + + + + 
 
 M^fl 
 
 
 
 i 
 
 
 
 i 
 
 
 
 H 
 O 
 
 - o 
 
 OOOOOOOO-- 
 
 w O 
 
 
 
 * b b 
 
 ooooooooop 
 bbbbbbbbbb 
 
 
 
 1 
 
 1 1 
 
 .S 
 
 V - 
 
 \O HN f^. rr% CO O^ N ^^ CO CO 
 
 p p - O ~t- N N NO r-~ 
 
 *- . 
 
 6 b b 
 
 bobbbbb b 
 
 
 
 
 t-i >/ 
 
 1 1 
 
 1 1 1 + + + 1 1 1 1 
 
 
 to o 
 
 OO l"^ N t^^ ** ^* OO *-^ ^^ fi 
 
 
 
 
 N H- M VD f~i M OO OO N t^- 
 
 t- -<j 
 
 O O 
 
 pooooppp^p 
 
 2 05 
 
 * b b 
 
 bbbbbbbbbb 
 
 H 
 
 + 1 
 
 + + + + + + + + + + 
 
 ." gci 
 
 " ' H- o 
 
 H- t^i 
 
 Nf^OO N N f* t^MLr, 
 
 N-H--^-Th N-^- t/->i-i 
 
 p.fe 
 
 O _* N 
 
 O Ch O ^O c>*oco ooo ci 
 
 4* 
 
 - O 
 
 O\t^.t^^o v or^-ooo 
 
 H 
 
 ff 
 
 t^CTxH-N N -f-OO^OOOOO 
 
 g <i 
 
 tn ir-* 
 
 urtrornr^tj^^-H-N N N 
 
 ^_| 
 
 - N 
 
 to , to . * ,- ^ ^ j. 
 
 B 
 
 O.A 
 
 H - 
 
 ON NO NO -^" CO NO ON NO NO ~^- 
 
 a 
 
 
 
 1? 
 
 H 
 
 1 1 
 
 O T2 IE ^ . 
 N t Pi *" 00 o 
 
 , p. 35 5 
 S-^S^^tlaJO^O 
 
OBSERVATIONS OF THE SUN, IN THE YEARS 1877 TO 1886. 
 
 (31) 
 
 Iv [nations formed by assuming the Error in Ecliptic North PoUir Distance to be 
 represented by the Formula 
 
 jr x cos Sun's longitude + y x sin Sun's longitude + z, 
 
 and altering the number of observations so as to mike the assumed weights of opposite 
 parts of the year equal : 
 
 Spring 
 
 Summer . . . 
 
 Autumn ... 
 
 + 0-3665 x x 0-9304 x y + z Weight 3 
 
 + 0-8390 x x 0-5442 x y + z , , 8 
 
 + 0-9999 x x 0-0163 x y + z 9 
 
 + 0-8938 x x + 0-4485 x y + z ,, 6 
 
 + 0-5630 x x + 0-8264 x 1 J + ' 7 
 
 + 0-1129 x .r + 0-9936 x y + z ,, 7 
 
 - 0-4376 x x + 0-8992 x y + z ,, 9 
 0-8061 x x + 0-5918 x y + z ,, 6 
 
 - 0-9983 x x + 0-0579 x y + z ,, 5 
 
 Winter ... 
 
 0-9184 x x - 0-3955 x y + z ,, 
 0-5831 x x 0-8124 x y + z ,, 4 
 0-1441 x x 0-9896 x y + z ,, 8 
 
 Equations multiplied by the Weights : 
 
 { 0-27 = 4- i '0995 x x 2-7912 x // + 3 z 
 
 - 2-40 = + 6-7120 x .r - 4-3536 x y + 8 z 
 
 5-22 = + 8-9991 x x 0-1467 x y + 9 z 
 
 !+ 2-76 = + 5-3628 x x + 2-6910 x y + 6z 
 
 + 1-05 = + 3-9410 x x + 5-7848 x y + 72 
 
 + 2-52 = + 0-7903 x x + 6-9552 x y + 7 z 
 
 Winter 
 
 !+ 5'49 = - 
 - '-95 1 : 
 
 ( - 4-08 = - 
 
 ...j- 4 -28= - 
 
 ( - 3-04 = - 
 
 3-9384 A .i- + 8-0928 x y + 9 z 
 
 4-8366 x .r + 3-5508 x y + 6s 
 
 4-9915 x x + 0-2895 x y 4- *>z 
 
 7-3472 x x 3-1640 x y + 8 z 
 
 2-33*4 x x - 3-2496 x y 4- 4 g 
 
 1-1528 x x 7-9168 x y + 8 z 
 
(32) RECOMPUTATION OF THE POSITION OF THE ECLIPTIC FROM 
 
 New Equations formed by adding and subtracting those above, as indicated below : 
 
 Spring + Summer + Autumn + Winter 
 6"-26 = + 2*3058 x x + 5742Z x y + 80 z 
 
 Spring + Summer Autumn Winter 
 + 3"-i4 = + 51-5036 x x + 10-5368 x y 
 
 Spring Summer Autumn + Winter 
 32"'32 = + 9-6506 x x 48-9860 x y 
 
 Solution of these Equations : 
 
 a 
 x = 0-05 
 
 y + 0-65 
 
 3 = 0'12 
 
 The first term, taken alone, indicates that, at the first point of Aries, the Error of the 
 tabular Ecliptic N.P.D. is negative, or that the assumed Ecliptic is north of the Sun's 
 true path, by 0"'05 ; and therefore that the right ascensions of all stars ought to be 
 
 diminished by - -J-^ ^ = 9 '009. 
 
 J la x sin 23 . 27 
 
 The second term, taken alone, indicates that the obliquity assumed in the Nautical 
 Almanac ought to be increased by 0"'65. 
 
 The third term indicates that the obliquity deduced from the southern solstice is 
 greater than that deduced from the northern solstice by 0"'24 ; or that the mean of 
 observed distances from the Pole to the Ecliptic is too great by 0"'12. 
 
OBSERVATIONS OF THK SUN, IN THK YEARS 1877 TO 1886. (33) 
 
 B 
 '" '- 
 
 NO 
 
 b 
 
 00 
 
 b 
 
 
 b 
 
 p 
 b 
 
 NO 
 O 
 
 o 
 
 N 
 
 b 
 
 NO 
 NO 
 
 OJO 
 
 b 
 
 o 
 
 b 
 
 p 
 b 
 
 H N 
 
 O 
 I 
 
 O 
 
 I 
 
 o 
 
 I 
 
 p 
 
 b 
 I 
 
 a a 
 
 o 
 b 
 
 o 
 I 
 
 p 
 b 
 
 I 
 
 a S 
 S2S 
 
 o 
 b 
 
 oo oo 
 
 o 
 o 
 
 o 
 o 
 
 8 
 
 b 
 
 8 
 
 b 
 
 8 
 
 b 
 
 o 
 o 
 
 o 
 I 
 
 p 
 b 
 
 oo 
 
 b 
 
 o 
 o 
 
 vo 
 
 o 
 
 o 
 I 
 
 8 
 
 b 
 
 o 
 b 
 
 o 
 o 
 
 o 
 I 
 
 o 
 
 b 
 
 p 
 
 b 
 
 p 
 b 
 
 p 
 b 
 
 p 
 b 
 
 p 
 b 
 
 p 
 b 
 
 oo 
 O 
 
 .-o 
 
 o 
 
 ON 
 
 ON 
 
 
 O 
 
 b 
 
 E oo 
 
 ON ON 
 
 
 1 
 
 & 
 
 VO 
 
 1 
 a 
 i-s 
 
 bo 
 
 00 
 
 1 
 
 O 
 
 
 P 
 
 OBEENWICH OBSKKYATIOXS, 1887. 
 
(34) 
 
 RECOMPUTATION OF THE POSITION OF THE ECLIPTIC FROM 
 
 Equations formed by assuming the Error in Ecliptic North Polar Distance to be 
 represented by the Formula 
 
 x x cos Sun's longitude + y x sin Sun's longitude + z, 
 
 find altering the number of observations so as to make the assumed weights of opposite 
 parts of the year equal : 
 
 !+ 0-66 = + 0-4597 x x 0-8881 x y 
 + 0-83 = + 0-8268 x x 0-5626 x y 
 0-15 = + 0-9922 x x 0-1245 x y 
 
 '+ 0-66 = + 0-4597 x x 0-8881 x y + Weight 10 
 
 + 2 ,, 8 
 + 2 12 
 
 ) + 0-45 = + 0-8879 x x + '4599 * y + s 
 + 1-23 = + 0-5802 x a; + 0-8145 x V + z 11 9 
 + 0-73 = + 0-0837 x x + 0-9965 x y + z ,, 13 
 
 Autumn 
 
 0-3420 x x + 0-9397 x y + z ,, 10 
 0-8418 x x + 0-5398 x y + z ,, 10 
 0-9916 x x + 0-1297 x y + z ,, 10 
 
 Winter 
 
 0-9392 x x - 0-3434 x y + z ,, 10 
 0-5721 x x 0-8202 x y + z ,, 10 
 0-0779 x x 0-9970 x y + z ,, 10 
 
 Equations multiplied by the Weights : 
 
 Spring 
 
 + 4-5970 x x 8-8810 x y + 10 z 
 + 6-6144 x x ~ 4'5o8 x y + 8 z 
 + 11-9064 x x 1-4940 x y + 122 
 
 f+ 3-60 = + 7-1032 x x + 3-6792 x y + 82 
 
 Summer...-? + 11-07 = + 5*2218 x x + 7-3305 x y + 92 
 
 (+ 9-49 = + 1-0881 x x + 12-9545 x y + 13 z 
 
 !+ 0-40 = 3-4200 x x + 9'397o x y + 10 z 
 
 0-70 = 8-4180 x x + 5-3980 x y + 10 z 
 
 2-50 = 9-9160 x x + 1-2970 x y + 10 z 
 
 ! 2-50 = 9-3920 x x 3-4340 x y + 102 
 
 5-40 = 5-7210 x x 8-2020 x y + 102 
 
 0-50 = 0-7790 x x 9-9700 x y + 10 2 
 
OBSERVATIONS OF THE SUN, IN THE YEARS 1877 TO 188G. (35) 
 
 Xew Equations formed by adding and subtracting those above, as indicated below : 
 
 Spring + Summer + Autumn + Winter 
 + 24-40 = - 1-1151 x x + 3*5744 x y + no z 
 
 Spring + Summer Autumn Winter 
 + 46'-8o = + 74-1769 x x + 14-6024 x y 
 
 Spring Summer Autumn + Winter 
 i8"'32 = + 15-5667 x .r 76-5380 x .'/ 
 
 Solution of these Equations : 
 
 
 a- = + 0-56 
 
 y = + 0-35 
 
 S = + O'ZO 
 
 The first terra, taken alone, indicates that, at the first point of Aries, the Error of the 
 tabular Ecliptic N.P.D. is positive, or that the assumed Ecliptic is south of the Sun's 
 true path, by 0"'56, and therefore that the right ascensions of all stars ought to be 
 
 /V; ( r (* 
 
 increased by - - = 8< 094. 
 
 J 15 x sin 23. 27' 
 
 The second term, taken alone, indicates that the obliquity assumed in the Nautical 
 Almanac ought to be increased by 0" - 35. 
 
 The third term indicates that the obliquity deduced from the southern solstice is 
 lc>s than that deduced from the northern solstice by 0"'40 ; or that the mean of 
 observed distances from the Pole to the Ecliptic is too small by 0"'20. 
 
 E 2 
 
(36} CORRECTIONS TO REFRACTION FOR REVISED READINGS OF 
 
 CORRECTIONS TO REFRACTION II MERIDIAN OBSERVATIONS FOR REVISED 
 READINGS OF THE EXTERIOR THERMOMETER AND OF THE BAROMETER, 
 IN THE TEARS 1877 TO 1886. 
 
 In examining the computations for the Ten- Year Catalogue several instances were 
 found in which the exterior thermometer (or sometimes the barometer) was not read 
 sufficiently near the observation of a star, and the usual practice of using the reading 
 immediately preceding each observation did not therefore give a sufficiently accurate 
 value of the refraction for the time of observation. A careful list has been made of 
 these cases, and the reading of the thermometer or barometer has been inferred from 
 comparison of neighbouring readings with the meteorological register ; or, in some 
 cases, on referring to the original observers' books, an actual reading of the exterior 
 thermometer was found, which had hitherto been overlooked. With the new readings 
 the refractions were re3alculated in the original zenith distance computations. The 
 following is a list of all such cases of corrections to the refraction of stars in the years 
 1877-1885 arranged in order of Right Ascension. The year 1886 is treated separately 
 at the end. 
 
 Column 1 gives the date. 
 
 Column 2 the Star's name. 
 
 Column 3 the approximate right ascension for 1880'0. 
 
 Column 4 the reading of the thermometer used in the original computation of 
 refraction. 
 
 Column 5 the correct reading, either as found from the original books, or as inferred 
 from the meteorological register. When it appeared that the new reading did not differ 
 more than 0'5 from the old, the case was not investigated further. 
 
 Column 6 the approximate refraction, in seconds of arc. 
 
 Column 7 the correction to refraction, i.e., the difference between the original 
 refractions and those recomputed with the corrected thermometer readings. 
 
 All corrections less than 0"'10 have been neglected. 
 
 These corrections have been applied in forming the Mean N.P.D's. in the Ten- Year 
 Catalogue, with the exception of a few which were inadvertently neglected and which 
 have been incorporated in the errata prefixed to the Ten- Year Catalogue. 
 
THE EXTERIOR THERMOMETER, IN THE YEARS 1877 TO 188G. 
 
 (37) 
 
 CORRECTIONS TO REFRACTION OF STARS FOR REVISED READINGS OF EXTERIOR 
 THERMOMETER AND BAROMETER IN THE YEARS 1877 TO 1885. 
 
 Date. 
 
 Star's Name. 
 
 R.A. 
 
 1 880-0. 
 
 Thermometer. 
 
 Refraction. 
 
 Correction 
 to 
 Refraction. 
 
 Used. 
 
 Corrected. 
 
 1884. April 22 
 1877 Nov. 16 
 
 )1 
 
 1882 April 8 
 1882 May 26 
 1885 Dec. 8 
 1884 May 20 
 1884 April 22 
 
 
 1884 April 22 
 1884 Sept. 29 
 
 j 
 1884 May 13 
 
 1882 Sept. 12 
 1885 May 2 
 1885 May 2 
 1880 June 1 8 
 1884 April 9 
 
 1884 Oct. 28 
 1884 April 9 
 1879 Nov. 7 
 1879 June 10 
 1 88 1 April 9 
 1883 May 17 
 1884 April 22 
 1883 May 23 
 1885 Sept. 5 
 1884 Nov. 20 
 1882 April 6 
 1877 Sept. 29 
 1877 Nov. 14 
 
 1879 Nov - l8 
 1877 Nov. 7 
 1878 April 23 
 1879 June 10 
 1880 June 8 
 1880 Sept. 22 
 1 88 1 May 6 
 > 
 
 10 CaHsiopeiaB S P 
 
 h m a 
 
 o. o. 13 
 
 O. 2. II 
 
 o. 2.47 
 
 o. 7. 3 
 o. 9.27 
 o. 10. 31 
 
 o. 18.37 
 o. 19. 15 
 
 0.23. 15 
 0.23.55 
 
 o. 28. 49 
 o. 29. 28 
 0.33.42 
 
 0-34-55 
 
 0.42.27 
 0.43.27 
 
 0-45-45 
 o. 49. 29 
 
 o. 56. 14 
 o. 59. i 
 
 i- 3-53 
 i. 4.23 
 
 I. 8.21 
 
 i. 14. 18 
 i. 14.45 
 
 
 
 367 
 48-9 
 
 
 
 4' - 5 
 62-8 
 31-9 
 
 53'i 
 367 
 
 J > 
 
 367 
 52-9 
 
 > 
 
 55'9 
 
 > 
 48-8 
 
 45'9 
 45 - 9 
 66-5 
 40-8 
 
 j > 
 467 
 40-8 
 41-9 
 6o - i 
 367 
 53'9 
 34'8 
 63-3 
 53-0 
 40-2 
 42-6 
 487 
 42-4 
 > i 
 
 44'9 
 48-4 
 52-9 
 6o - i 
 54-8 
 64-1 
 54'3 
 > > 
 
 
 
 36^0 
 44' i 
 
 1 
 
 407 
 57-8 
 30-6 
 52-1 
 35-6 
 
 J J 
 
 35'3 
 51-8 
 
 > 
 
 54'9 
 
 > 
 47'i 
 45'z 
 45'2 
 65-0 
 
 39'9 
 
 1 
 
 43 'l 
 39-6 
 
 41-0 
 59-2 
 35'9 
 53'' 
 
 I 4 ' 1 
 65-3 
 
 5*'3 
 39'4 
 4''3 
 46-4 
 44-0 
 
 ) 
 
 43-6 
 50-3 
 49-1 
 58-0 
 51-8 
 66-6 
 53'' 
 
 > 
 
 
 
 127 
 
 *5 
 
 J 
 
 162 
 
 '54 
 
 45 
 75 
 '44 
 
 236 
 69 
 
 > 
 
 73 
 
 > 
 
 85 
 
 21 I 
 
 212 
 177 
 
 "5 
 
 > 
 
 57 
 i*5 
 67 
 '43 
 150 
 82 
 6 9 
 116 
 67 
 
 IO2 
 
 50 
 
 44 
 45 
 
 J J 
 
 45 
 48 
 47 
 48 
 48 
 47 
 49 
 " 
 
 n 
 
 + 0-19 
 + 0-24 
 
 i * 
 + 0-26 
 
 + '-54 
 + 0-13 
 + 0-16 
 + o-33 
 
 > 
 + 0-69 
 
 + 0-16 
 
 
 
 + 0-15 
 
 > 
 + 0-30 
 + 0-30 
 + 0-30 
 + 0-53 
 
 + 0-22 
 
 
 + 0-40 
 + 0-3I 
 + 0-13 
 + 0-26 
 + 0-26 
 -f OM3 
 + O'M 
 - 0-46 
 
 + o-io 
 + 0-17 
 + 0-13 
 
 -t- 0'2 1 
 - 0-15 
 
 
 + 0'12 
 O-14 
 + 0-30 
 + 0-20 
 + 0-29 
 - 0-23 
 + O'I2 
 
 9 > 
 
 a Andromeda; R. 
 
 ..D 
 
 
 
 
 Bradley 6 S P 
 
 Piazzi 0. 25 S P R. 
 
 , D. 
 
 Bradley 23 SP 
 
 
 D. 
 
 Bradley 34 S.P R. 
 
 ...D. 
 
 12 Ceti 
 
 
 Bradley 49 8 P 
 
 
 
 ...D. 
 
 
 Bradley 82 S P 
 
 W B 77? 
 
 y Cassiopeiae S.P 
 
 
 Groom bridge 215 S P 
 
 Bradley 109 S P 
 
 
 33 Ceti 
 
 37 Ceti 
 
 a 1 Ursie Minoris S P 
 
 
 ...R. 
 
 D. 
 
 
 Polaris S P 
 
 
 
 
 
 R 
 
 ...L>. 
 
 
 /3 Cassiopeia S.P. (1882 May 36). It is assumed that an error of 5 was made in the reading of the 
 thermometer. 
 f Pegasi. The automatic register having failed on thij day, the reading of the thermometer ha* been interpolated 
 from neighbouring reading. 
 32 Cassiopeue S.P. The correction for index error of the thermometer hrul been erroneously applied. 
 Polaris S.P. (1877 November 7). The reading of the barometer (29 iB 74) has also been supplied from the 
 meteorological register, the reading previously used being 29 iD 7i. 
 
(38) CORRECTIONS TO REFRACTION FOR REVISED READINGS OF 
 
 CORRECTIONS TO REFRACTION OF STARS, &c. continued. 
 
 Date. 
 
 Star's Name. 
 
 R.A. 
 
 1 880-0. 
 
 Thermometer. 
 
 Refraction. 
 
 Correction 
 to 
 Refraction. 
 
 Used. 
 
 Corrected. 
 
 1882 April 6 
 1882 April 14 
 
 1883 April 16 
 1883 June 4 
 1883 Sept. 14 
 1883 Oct. 17 
 1884 April 21 
 1884 June 13 
 1881 May 7' 
 1883 May 21 
 1883 Dec. 6 
 1 88 1 May 7 
 1 88 1 May u 
 1883 Nov. 12 
 1882 Oct. 30 
 
 1882 Feb. i 
 1883 Dec. 14 
 1 88 1 May u 
 1879 Nov. 14 
 1884 Nov. 7 
 
 < 
 1883 June 6 
 1883 June 6 
 1884 May 24 
 1885 May 15 
 
 1 88 1 May 12 
 1885 Nov. 2 
 
 1 88 1 May 7 
 1883 June 4 
 
 1 88 1 May 7 
 1883 Oct. 13 
 1883 June 6 
 1883 Oct. 13 
 
 Polaris S.P 
 
 b ni s 
 I. 14.45 
 
 I. 22. 30 
 1.28.57 
 I.3I.38 
 1.33.28 
 
 I-36.39 
 1.38.30 
 
 i-39- 3 
 
 1.45.46 
 1.54.21 
 
 2. O. 25 
 2. 2. 5 
 
 * 5-55 
 
 \ 
 2. 14. 
 
 2. 18. 23 
 
 2. 19. 12 
 
 2. 19. 13 
 
 2.28.35 
 2. 30. 48 
 
 *-33-4 6 
 
 
 
 42^6 
 
 44'9 
 > > 
 42-9 
 61-6 
 65-2 
 507 
 34-8 
 67-1 
 55-8 
 53'5 
 3'4 
 55-8 
 40-8 
 
 357 
 48-6 
 
 ) ) 
 
 33-8 
 
 45'i 
 40-8 
 32-2 
 46-8 
 
 * 
 50-8 
 50-8 
 
 55'9 
 477 
 i > 
 46^0 
 48-2 
 
 > 
 
 51-2 
 
 58-3 
 
 ) 
 
 51-2 
 51-0 
 50-8 
 51-0 
 
 o 
 
 4''3 
 43-8 
 
 > 
 
 4''5 
 60-3 
 69-0 
 52-0 
 
 33-8 
 65-6 
 517 
 52-3 
 30-8 
 
 5''4 
 39-6 
 34-8 
 
 47'5 
 
 > * 
 
 32'9 
 43'5 
 39-6 
 31-7 
 44-6 
 
 > 
 
 5-3 
 5'3 
 55'3 
 47-2 
 
 ) 
 
 44-8 
 4 6- 3 
 
 1 5 
 
 49-8 
 
 57'5 
 
 
 
 49-8 
 477 
 49'3 
 477 
 
 // 
 
 5 
 48 
 
 ? 
 
 49 
 
 47 
 47 
 48 
 
 5 
 47 
 
 "S 
 
 86 
 
 in 
 1 06 
 108 
 
 87 
 142 
 
 J 
 
 57 
 53 
 131 
 198 
 32 
 
 9 > 
 
 214 
 
 105 
 105 
 1 06 
 > > 
 "93 
 5i 
 s 
 109 
 105 
 
 ? 
 109 
 
 322 
 
 90 
 
 H7 
 
 
 + 0-13 
 
 + O'l I 
 
 ? ? 
 + 0-14 
 + 0-13 
 - 0-38 
 - 0-13 
 + 0-17 
 + 0-14 
 + 0-95 
 
 + 0'22 
 O'll 
 
 + '95 
 + 0-26 
 
 + 0-16 
 + '4 2 
 > 
 + o-n 
 + 0-18 
 + 0-32 
 + o'34 
 + 0-15 
 j 
 
 + 0'2I 
 + O'll 
 + 0-13 
 + 0-13 
 
 > 5 
 
 + '47 
 
 + - 20 
 
 > 5 
 + 0-3I 
 
 + 0-16 
 
 ) 
 
 + '3i 
 
 + 2M2 
 + 0-28 
 + 0'80 
 
 ...R. 
 
 D. 
 
 
 
 
 
 
 
 Lalande 2651 2 SP 
 
 
 Piazzi I 131 
 
 w Ciissiopeiae S P 
 
 
 W. B. I. 664 
 
 T Ceti R 
 
 ...D 
 
 
 
 Cassiopeiae S P 
 
 v Ceti 
 
 a Arietis R. 
 
 D. 
 
 Piazzi I 256 SP 
 
 Lalande 3987 SP 
 
 
 ...R. 
 
 ...D. 
 
 i Persei S P 
 
 Arietis R. 
 
 D 
 
 Bradley 332 SP 
 
 ...R 
 
 D 
 
 7-Year Cat. (1860) No. 156 S.P. 
 Piazzi II 122 
 
 Bradley 353 S P 
 
 Ceti 
 
 
 Polaris S.P. (1883 June 4). The correction for index error of the thermometer had been erroneously applied. 
 Polaris S.P. (1.883 July 2). The reading of the barometer (29'" -91) has been supplied from the meteorological 
 register, the reading previously used being 29'" -99 : the consequent correction to refraction is o'-i3. 
 Polaris S.P. (1883 September 14). The reading of the barometer (29 in '97) has also been supplied from the 
 meteorological register, the reading previously used being 29'"'99. 
 Lalande 2651-2 S.P. It is assumed that the reading of the interior thermometer was entered by mistake. 
 <a Cassiopeia? S.P. It is assumed that the reading of the interior thermometer was entered by mistake. 
 v Ceti. The reading of the barometer (30 iQ -2 2) has also been supplied from the meteorological register, the 
 reading previously used being (3O in '2o). 
 Piazzi I. 256 S.P., Lalande 3987 S.P. (1883 June 6). The automatic register having failed on this day, the 
 reading of the thermometer has been interpolated from neighbouring readings. 
 Piazzi II. 122. It is assumed that the reading of the interior thermometer was entered by mistake. 
 Bradley 353 S.P. The automatic register having failed on these days, the readings of the thermometer have 
 been interpolated from neighbouring observations. 
 
THE EXTERIOR THERMOMETER, IN THE YEARS 1877 TO 1886. (39) 
 
 CORRECTIONS TO REFRACTION OF STARS, &c. continued. 
 
 Date. 
 
 Star's Name. 
 
 R.A. 
 
 1880-0. 
 
 Thermometer. 
 
 Refraction. 
 
 Correction 
 to 
 Refraction. 
 
 Used. 
 
 Corrected. 
 
 1880 Nov. l 
 1884 Nov. 7 
 1884 June 2 
 
 1883 Oct. 13 
 1883 May 7 
 
 > 
 
 1879 Jan. 15 
 1 88 1 May 23 
 1883 May 31 
 1883 May 23 
 
 jj 
 1885 Nov. 30 
 1884 July i 
 1884 July i 
 1884 May 8 
 
 1883 Dec. 3 
 1884 Nov. 7 
 1883 May 24 
 
 
 1885 June 26 
 1881 Feb. 16 
 
 M 
 1884 June 27 
 1885 May 20 
 
 
 1881 Jan. 4 
 1881 Feb. 16 
 1882 July 15 
 1884 May 29 
 1 88 1 Jan. 4 
 1885 Feb. 7 
 1885 May 20 
 
 > 
 1881 June 22 
 1 88 1 Jan. 4 
 1882 July 15 
 1877 May i^ 
 1882 June 23 
 1884 July i 
 
 
 1878 Jan. 10 
 1 88 1 Jan. 4 
 
 f Ceti 
 
 h 111 s 
 
 2-37- 5 
 
 2. 44. 42 
 
 2. 46. 2 7 
 
 2.49. 4 
 
 2.57. 17 
 
 2. 59 . 48 
 3. 0.25 
 
 3. 2. 18 
 
 3. 12. 14 
 
 3.14. 16 
 
 3- '7- 54 
 3.22. 5 
 
 3.28.29 
 3-30-I5 
 3-3'. 45 
 
 3-37-43 
 3.46.51 
 
 3- 5- * 
 
 3. 52. 26 
 3-54- i 
 
 3-55-*6 
 
 3-57-53 
 3.58.46 
 
 3- 59- 2 3 
 
 3- 59- 57 
 4. 2. u 
 
 4- 3-45 
 4. 5.11 
 4. 6. 14 
 4. 6. 20 
 
 4- 9-45 
 
 o 
 34-1 
 
 44'3 
 
 5*7 
 
 ) J 
 
 51-0 
 437 
 
 J J 
 
 39'9 
 54'' 
 53-0 
 61-4 
 
 J J 
 
 46-8 
 64-8 
 64-8 
 50-8 
 > 
 
 49'9 
 43-8 
 
 557 
 > > 
 
 S3'' 
 45-6 
 
 j 
 6 1 -9 
 
 43'' 
 
 > 
 37-6 
 45-6 
 61-6 
 44-8 
 37-6 
 43-8 
 43'i 
 
 9 
 
 55'3 
 37-6 
 61-6 
 50-5 
 
 54-3 
 63-7 
 
 ) 9 
 
 36-4 
 37-6 
 
 o 
 
 33'4 
 43-8 
 
 5i-4 
 
 J 9 
 
 477 
 43'i 
 
 38-6 
 
 53'' 
 
 50-9 
 
 597 
 
 9 9 
 46'0 
 
 64-1 
 64-1 
 50-1 
 
 9 9 
 
 49'3 
 43-0 
 
 54' 5 
 > > 
 5* - 3 
 42-0 
 
 9 9 
 
 61-2 
 42-1 
 
 9 9 
 
 36-6 
 41-8 
 60-3 
 43-8 
 36-2 
 
 43'4 
 41-1 
 
 9 9 
 
 54-6 
 36-2 
 59'9 
 
 477 
 53-o 
 62-4 
 
 9 9 
 
 34'4 
 36-2 
 
 
 68 
 3'7 
 136 
 
 9 5 
 
 39 
 123 
 
 i > 
 47 
 *97 
 297 
 81 
 
 9 9 
 
 77 
 118 
 
 87 
 
 85 
 
 9 9 
 
 190 
 
 "I 
 126 
 
 ^ 
 
 9' 
 
 12 
 
 ) 
 126 
 64 
 
 9 9 
 
 130 
 18 
 97 
 85 
 38 
 
 122 
 
 54 
 
 9 9 
 
 347 
 38 
 57 
 169 
 64 
 133 
 
 
 101 
 101 
 
 
 
 + O'lO 
 
 + 0-33 
 
 + - 37 
 
 + 0-26 
 + 0-15 
 
 i 
 
 + O'I2 
 
 + 0-66 
 + 1-27 
 + 0-28 
 
 
 4-0-13 
 + 0-16 
 
 + O'I2 
 + 0'12 
 
 
 + 0-24 
 + OM9 
 
 4- 0-31 
 
 + 0-15 
 + 0-13 
 
 
 + 0-18 
 + 0-13 
 
 9 9 
 
 + 0-27 
 + 0-18 
 + 0-25 
 + 0-17 
 
 + 0'2I 
 '+ O'lO 
 
 + O'l I 
 > 
 
 + 0-49 
 
 + OMI 
 
 + 0-19 
 + 0-98 
 + 0-16 
 
 -r 0-34 
 
 9 9 
 
 4- 0-42 
 4- 0-30 
 
 Piazzi II 200 
 
 Lalande 5273-4 8 P R 
 
 I) 
 
 p ! Arietis 
 
 Lalande 5579 S.P R 
 
 D 
 
 W. B. II. 1033 
 
 t Pereei S.P 
 
 
 Groombridge 612 S.P R. 
 
 ...D. 
 
 95 Ceti 
 
 Piazzi III. 27 S.P 
 
 Bradley 459 S.P 
 
 Bradley 471 S.P R 
 
 D. 
 
 r" Eridani 
 
 Lalande 6661 
 
 Piazzi III. 94 S.P R. 
 
 ...D 
 
 y Camelopardi S P 
 
 Piazzi III. '177 
 
 
 
 Piazzi III. 160 S.P R. 
 
 ...D 
 
 y 1 Eridani 
 
 Lalande 7284 
 
 Lalande 7284 S P 
 
 Groom bridge 771 SP 
 
 Piazzi III. 238 
 
 W B. III. 1120 
 
 Groombridge 750 S.P R 
 
 D. 
 
 c Persei S.P 
 
 <o' Tauri 
 
 Groombridge 774 S P 
 
 Lalande 77212 SP 
 
 Groombridge 779 S P 
 
 Piazzi III. 260 S P R 
 
 ...D 
 
 Q- Eridan i 
 
 
 
 c Ceti, p* Arietis. It is assumed that the reading of the interior thermometer was entered by mistake. 
 W. B. II. 1033. The automatic register having failed on these days, the readings of the thermometer have 
 been interpolated from neighbouring observations. 
 Lalande 5579 S.P.. Piazzi III. 94 S.P., c Persei S.P. The thermometer was read by the observer as above, but 
 the reading had been accidentally omitted from the computation sheets. 
 
(40) CORRECTIONS TO REFRACTION FOR REVISED READINGS or 
 
 CORRECTIONS TO REFRACTION OF STARS, &c. continued. 
 
 Date. 
 
 Star's Name. 
 
 R.A. 
 
 1880-0. 
 
 Thermometer. 
 
 Refraction. 
 
 Correction 
 to 
 Refraction. 
 
 Used. 
 
 Corrected. 
 
 1884 June 23 
 1885 Feb. 7 
 
 H 
 
 1878 Jan. 10 
 1882 Dec. 6 
 1883 June 16 
 
 
 1885 June 13 
 1878 Jan. 17 
 1882 Dec. 6 
 1882 June 27 
 
 
 1883 June 16 
 1885 June 26 
 
 1882 Feb. i 
 1879 Mar. 6 
 1879 Dec. i 
 
 
 1885 June 30 
 
 1878 Dec. 14. 
 1879 Mar. 6 
 1884 Aug. 12 
 1884 Aug. 7 
 1878 Dec. 14 
 1878 Dec. 14 
 1877 Dec. 6 
 1882 May 16 
 1885 July 6 
 
 1885 Dec. 28 
 1883 Dec. 15 
 1879 Dec. i 
 
 1884 July 9 
 1882 May 16 
 1884 Aug. i 
 1879 Mar. 3 
 1885 Mar. n 
 1884 Aug. i 
 1883 July 26 
 1885 July 6 
 1879 Mar. 3 
 
 Piazzi IV. 22 S P 
 
 h in B 
 4. II. 22 
 
 4- H-45 
 
 4. i R. 16 
 
 4.32.41 
 4-32-43 
 
 4- 44- 34 
 4- 44- 47 
 4-47- 8 
 
 4-49-33 
 
 4-57-17 
 5- o-z3 
 5. 0.48 
 
 5. 2.22 
 
 5- 7- i 
 5. 8.46 
 
 5- 9- 7 
 5. 10. o 
 
 5.15.24 
 5.15-38 
 
 5. 18. i 
 
 5.18.50 
 
 5.19. 8 
 
 5- 19-21 
 5.23.41 
 
 5-25-38 
 5.27.26 
 
 5.28.57 
 5-33- 6 
 5-34- 3 
 5- 34- 4* 
 
 o 
 58-3 
 
 43-8 
 
 ) ? 
 
 36-4 
 29-9 
 48-4 
 
 ) 
 
 56-7 
 42-2 
 29-9 
 6o - 1 
 
 > > 
 48-4 
 50-6 
 
 5 > 
 2 9 7 
 48-9 
 25-5 
 
 ) > 
 
 547 
 > 
 25-9 
 48-9 
 69^0 
 70-1 
 25-9 
 25-9 
 45'3 
 38-5 
 64-9 
 
 * 
 4o - o 
 40-8 
 
 25 - 5 
 
 ) 
 
 65-5 
 
 38-5 
 64-9 
 42-9 
 40^0 
 64-9 
 
 58-3 
 64-9 
 42-9 
 
 
 
 57'5 
 43'2 
 
 J 
 
 34 -I 
 29-4 
 47-1 
 
 > J 
 
 557 
 41-2 
 29-1 
 59-2 
 
 ) ) 
 
 46-9 
 497 
 
 J 
 
 28-6 
 
 477 
 
 24'0 
 > 
 
 53-5 
 
 > * 
 
 24-4 
 
 477 
 68-1 
 69-1 
 
 24'0 
 
 24^0 
 
 43'8 
 38-1 
 
 63-3 
 
 39'i 
 397 
 23-2 
 
 > > 
 
 64'3 
 38-0 
 64-2 
 
 4'"5 
 
 39-6 
 64^0 
 57-0 
 62-5 
 4''5 
 
 
 141 
 93 
 
 ) 
 
 34 
 131 
 76 
 
 I 
 
 76 
 
 72 
 
 H3 
 80 
 
 ? > 
 
 81 
 82 
 
 > > 
 280 
 
 201 
 31 
 
 J J 
 
 128 
 
 ) 
 
 68 
 
 IOO 
 
 156 
 
 67 
 76 
 76 
 126 
 132 
 124 
 
 > 
 148 
 108 
 26 
 
 ) ) 
 
 75 
 125 
 
 U7 
 '55 
 
 158 
 
 174 
 135 
 191 
 
 79 
 
 
 
 + 0-23 
 + 0'12 
 > 
 + 0-17 
 + 0-15 
 + O'2I 
 
 > 
 + 0-15 
 + 0-15 
 + 0-25 
 + 0-14 
 > 
 + 0-25 
 + 0-I 5 
 > ) 
 
 + 0-66 
 + '49 
 
 + O'lO 
 ? 
 
 + 0-31 
 
 
 + 0'2I 
 + 0-25 
 + 0-28 
 + 0-13 
 + 0-31 
 + 0-3I 
 + 0-5I 
 + 0'12 
 
 + - 39 
 
 + 0-28 
 + 0-24 
 + 0-13 
 
 > 
 + 0-18 
 + 0-13 
 + 0-16 
 + 0-46 
 + 0-13 
 + 0-31 
 
 + '34 
 + 0-92 
 + 0-23 
 
 Lalande 8154 R 
 
 D 
 
 /c 2 Tauri 
 
 53 Eridani 
 
 Piazzi IV. 1 1 2 S P R 
 
 ...D 
 
 
 W. B. IV. 936 
 
 60 Eridani 
 
 Piazzi IV. 191 S.P R 
 
 ...D 
 
 
 Piazzi IV 207 S P R 
 
 D 
 
 Piazzi IV. 289 
 
 Leporis 
 
 103 Tauri R 
 
 ...D 
 
 14 Camelopardi S.P R 
 
 ...D 
 
 P Orionis 
 
 Rigel 
 
 15 Camelopardi SP 
 
 Piazzi IV. 311 S.P 
 
 Bradley 750 
 
 o Orionis 
 
 8 Leporis 
 
 17 Camelopardi S.P 
 
 ...R 
 
 D 
 
 Lalande 10182 
 
 W. B. V. 4n . 
 
 Groombridge 966 R 
 
 ...D 
 
 Groombridge 966 S.P 
 
 19 Camelopardi S.P 
 
 
 a Leporis 
 
 
 22 Camelopardi S.P 
 
 23 Camelopardi S.P 
 
 25 Camelopardi S.P 
 
 Orionis 
 
 
 p Orionia, Bradley 750, and o Orionia. The automatic register haying failed on this day, the readings of the 
 thermometer have been interpolated from neighbouring readings. 
 8 Leporis. The reading of the barometer (29 in -56) has also been supplied from the meteorological register, the 
 reading previously used being 29'" -53. 
 
THE EXTERIOR THERMOMETER, IN THE YEARS 1877 TO 1886. 
 
 (41) 
 
 CORRECTIONS TO REFRACTION OF STARS, &c. continued. 
 
 Date. 
 
 Star's Name. 
 
 R.A. 
 
 isxo-o. 
 
 Thermometer. 
 
 Refraction. 
 
 Correction 
 to 
 Uefraotion. 
 
 Used. 
 
 Corrected 
 
 1885 Mar. ii 
 1883 July 26 
 1881 June 29 
 1884 July 9 
 1885 Dec. ii 
 1 88 1 Mar. n 
 1882 Aug. 8 
 1882 June 27 
 1884 Aug. 4 
 18X4 July ; 
 1884 Aug. i 
 1884 Aug. 16 
 i 883 June 30 
 
 1882 July 26 
 
 1880 Mar. 1 8 
 1880 Mar. 19 
 1*8} July 26 
 
 1884 Aug. 5 
 
 
 i>'8 ( Mar. 10 
 
 
 1885 Jan. zo 
 1880 Mar. 1 8 
 1 88 1 Aug. 10 
 1882 Aug. 7 
 1882 Aug. 23 
 1884 Mar. 24 
 1880 Mar. 24 
 188; Jan. 20 
 1882 Aug. ii 
 
 1884 Mar. 10 
 
 
 1880 Mar. 24 
 1884 June 27 
 1879 Mar. 6 
 1885 Dec. 28 
 1885 Jan. 20 
 1884 Aug. 6 
 1882 Mar. 1 6 
 1882 Mar. 31 
 1884 Mar. 24 
 
 Piaz/.i V 220 
 
 h ui t 
 5. 40. 24 
 
 5- 44- 47 
 5.48.22 
 
 5- 59- H 
 6. 1.32 
 
 6. 2. 27 
 6. 4.54 
 
 6- 5-37 
 6. 6. 17 
 6. n. i 
 
 6. 15.39 
 6. 16. 8 
 6. 16. 8 
 6.21.49 
 
 6. 22. 2 
 6.22.45 
 
 6. 27. 9 
 
 6.27.32 
 6.27.35 
 6. 28. 12 
 6.29.25 
 6. 30. 58 
 6.31.27 
 6- 34- 37 
 6-35-37 
 6.35.38 
 6.36. 13 
 
 6.37. 13 
 6. 38. 12 
 6- 38- 33 
 6- 39- 5* 
 6. 40. 49 
 6.42. 32 
 6. 43- 46 
 
 o 
 40-0 
 
 58-3 
 56-9 
 64-1 
 2 5 -6 
 52-0 
 58-6 
 58-5 
 62-3 
 6r8 
 
 637 
 65-4 
 
 59'5 
 
 J J 
 
 56-9 
 
 ? 
 
 41-9 
 4.1-1 
 
 56-3 
 
 59'4 
 40-8 
 
 27 ! 8 
 41-9 
 6ro 
 57'< 
 54 - ' 
 447 
 43'4 
 27-8 
 
 57'4 
 
 J 
 40-8 
 
 ) 
 
 43'4 
 56-9 
 
 477 
 38-1 
 27-8 
 62-8 
 54'3 
 49'4 
 447 
 
 
 
 39'0 
 
 57' 
 557 
 63-3 
 25-2 
 50-9 
 
 56-3 
 56-6 
 6ri 
 6o - i 
 62-9 
 65-, 
 58-4 
 
 J J 
 
 55-6 
 
 > 
 
 40-9 
 40-4 
 55'2 
 
 t > 
 58'0 
 
 1 
 4O*O 
 
 * 1 
 
 27-0 
 40-9 
 6o - o 
 56-, 
 527 
 43' 
 4'7 
 26-8 
 
 57'o 
 
 39-8 
 
 
 
 4'7 
 56-0 
 
 44" 3 
 37-2 
 26-8 
 6r8 
 52-9 
 47-2 
 42-1 
 
 
 
 72 
 183 
 1 06 
 
 '49 
 
 220 
 
 3' 
 144 
 96 
 
 94 
 131 
 
 130 
 285 
 156 
 
 1 > 
 
 70 
 
 > J 
 
 89 
 89 
 
 81 
 
 > 
 
 81 
 
 > 
 I I I 
 
 9 
 
 i'7 
 7 
 132 
 
 55 
 129 
 
 59 
 167 
 
 224 
 148 
 
 1 t 
 102 
 
 * 
 
 4 6 
 182 
 
 47 
 '45 
 
 57 
 7' 
 42 
 4" 
 4* 
 
 
 
 + 0-16 
 + 0-48 
 + 0-26 
 + 0-24 
 + 0-19 
 + 0-07 
 + 0-66 
 
 + '37 
 + 0-2:5 
 + 0-45 
 
 + O'22 
 + 0-17 
 
 + - 34 
 1 1 
 + 0-19 
 
 i 
 
 + 0-18 
 + 0-13 
 
 + o-iS 
 
 > * 
 
 + 0-23 
 
 
 + 0-19 
 
 
 
 + 0'20 
 
 + 0-16 
 + 0-26 
 + o-ii 
 + o'37 
 
 + 0'20 
 
 + '59 
 + 0-48 
 
 + OM2 
 
 > 
 
 + 0'2I 
 
 + 0-16 
 
 + '.H 
 + 0-36 
 
 + 0-27 
 
 + 0'I2 
 + 0-I4 
 + O'I2 
 + OM9 
 + 0-23 
 
 Aurigw S.P 
 
 Piazzi V. 246 S.P 
 
 37 Ciunclop irdi S.P 
 
 Pi&zxi \_342 
 
 3 Geminoruin 
 
 40 Camelopardi S.P 
 
 Piazzi V. 335 S.P 
 
 Piazzi V. 337 S.P 
 
 3 Lyncis S P 
 
 
 46 \uri ".T S P 
 
 Piazzi VI 61 SP ... . 
 
 5 Lyncis SP 
 
 Groombridge 1 1 5 1 SP R 
 
 ...D 
 
 i o Monocerotis 
 
 
 Radcliffe 1742 S P R 
 
 ...D. 
 
 
 D 
 
 Piazzi VI. 154 R. 
 
 ..D. 
 
 
 W B VI 771:.. 
 
 10 Lyncis S P 
 
 Carrington 929 SP 
 
 41 Camelopardi S.P 
 
 
 
 W B VI 999 
 
 1 2 Lyncis SP (ist Star) 
 
 12 Lyncis S.P (2nd Star) 
 
 W. B VI 1064 R. 
 
 . D 
 
 30 Geminorum .. 
 
 Lalande (F ) 968 
 
 Geminoruin 
 
 Sirius 
 
 1 7 Moiioccrot is . 
 
 Piuzzi VI 201 S P 
 
 Cephei 51 
 
 
 
 
 i Oeminorum. The reading of the barometer (30'" 17) ban also been supplied from the meteorological regisu-r. 
 the reading previously used being 30'" 1 5. 
 
 GRKEXWICH OBSEBVATIONS. 18S7. 
 
(42) CORRECTIONS TO REFRACTION KOK REVISED READINGS OK 
 
 CORRECTIONS TO REFRACTION OF STARS, &c. continued. 
 
 Date. 
 
 Star's Name. * Q 
 
 Thermometer. 
 
 Refraction. 
 
 Correction 
 to 
 Refraction. 
 
 Used. 
 
 Corrected. 
 
 1877 Sept. 5 
 1 88 1 May 31 
 1882 May 29 
 1882 Aug. ii 
 1882 Aug. 21 
 1882 Aug. 23 
 1883 June ii 
 1883 Sept. 19 
 1884 July 9 
 1884 Aug. 4 
 1885 July 22 
 1885 Aug. 14 
 1885 Aug. 25 
 1885 Oct. i 
 1884 Aug. 6 
 1884 Mar. 24 
 1884 Mar. 15 
 1883 Aug. 21 
 1884 July 17 
 
 1884 Feb. 25 
 
 j> 
 1884 Mar. 15 
 1882 Aug. 9 
 1883 Aug. 21 
 1883 Mar. 15 
 1884 Mar. 15 
 1882 Jan. 24 
 1880 Feb. 4 
 1884 Feb. 21 
 1884 Feb. 25 
 1884 Mar. 15 
 1883 Mar. 15 
 1885 July ii 
 1880 Mar. 23 
 1884 Feb. 25 
 
 1880 Feb. 4 
 1882 Mar. 17 
 1883 Mar. 30 
 1882 April 6 
 
 1882 Mar. 1 8 
 1880 Sept. 3 
 1884 Mar. 24 
 
 Cephei 51 SP 
 
 ll 111 S 
 
 6.43.46 
 
 6. 47. 43 
 6.47. 56 
 
 6-53-4 1 
 6. 55.2; 
 
 6.56. 3 
 
 6.58.52 
 
 7- o-44 
 7. i. 20 
 7- 2.32 
 7- 3-31 
 7- 4- 9 
 
 7- 5- 2 7 
 
 7- 5-44 
 7. 7.18 
 7. 8.47 
 
 7. 10. o 
 7- II-33 
 
 7- 12. 57 
 
 7. 13.41 
 7. 15.32 
 7- 19- 15 
 
 -o 
 56-3 
 54'3 
 55'5 
 57'4 
 57-4 
 54'I 
 51-9 
 6l-i 
 62-7 
 60-7 
 
 55'3 
 56-1 
 58-6 
 53-6 
 62-8 
 
 447 
 54'9 
 67-1 
 
 577 
 
 ? 
 
 42-6 
 
 ? ) 
 
 54'9 
 57'3 
 67-1 
 29-9 
 
 54'9 
 33'4 
 34'8 
 43'2 
 42-6 
 
 54'9 
 29-9 
 
 62-2 
 37-6 
 
 42'6 
 
 J > 
 
 34-8 
 54-6 
 
 487 
 51-7 
 
 7 j 
 
 51-0 
 
 66-6 
 41-8 
 
 o 
 52-6 
 52-8 
 54-0 
 56-4 
 56', 
 
 527 
 46-9 
 6o'o 
 6 1 -4 
 59-6 
 
 53-8 
 51-9 
 56-2 
 52-0 
 61-4 
 
 42'O 
 
 54-0 
 66-5 
 56-8 
 
 ? 5 
 
 4'7 
 
 53'9 
 56-7 
 
 66-5 
 28-4 
 
 53-8 
 32-1 
 
 34' 6 
 43-6 
 41-8 
 
 537 
 28-4 
 61-3 
 36-8 
 41-8 
 ? 5 
 
 34'2 
 54-0 
 48-1 
 50-0 
 
 ? 
 5O'o 
 65-1 
 40-8 
 
 5 
 5' 
 5i 
 5 
 5 
 5 
 51 
 5 
 49 
 5 
 5i 
 5i 
 5 
 5 
 89 
 
 29 
 238 
 142 
 144 
 
 ? 
 
 9 
 
 ) <i 
 
 89 
 
 138 
 .36 
 63 
 55 
 35 
 269 
 140 
 141 
 138 
 61 
 
 58 
 258 
 1 08 
 ) > 
 283 
 208 
 204 
 33 
 i ? 
 226 
 1 06 
 142 
 
 + 0-38 
 + 0-15 
 + o'i 6 
 
 + O'l I 
 
 + 0-14 
 + 0-14 
 + '59 
 
 + O'l I 
 
 + 0-13 
 
 + O'l I 
 
 + 0-15 
 
 + '43 
 + 0-24 
 + 0-17 
 + 0-25 
 + 0-16 
 
 + '44 
 + 0-17 
 + 0-26 
 
 ? > 
 + 0-17 
 
 + 0-18 
 + 0-17 
 + 0-17 
 
 + O'2O 
 + 0-13 
 + O'lO 
 + O'l 2 
 O'll 
 
 + 0-23 
 + 0-34 
 
 + O'2O 
 + O'lO 
 
 + '43 
 + 0-18 
 
 J J 
 
 + 0-36 
 + 0-29 
 + 0-24 
 
 + O'l I 
 
 ) 
 
 + 0-46 
 + 0-30 
 + 0-30 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 Groombridge 1228 S.P 
 
 37 Geminorum 
 
 Piazzi VI 303 
 
 Piazzi VI 2938? 
 
 ...R 
 
 ...D 
 
 Lalande 13627 R 
 
 ..D 
 
 
 1 7 Lyncis S P 
 
 
 Lalande 13781 
 
 W B VI 1877 
 
 Piazzi VI 285 
 
 8 Canis Majoris 
 
 Lalande 13928 
 
 
 
 Piazzi VII 8 
 
 Piazzi II. 292 SP 
 
 26 Canis Majoris 
 
 Lalande 14091 .... R 
 
 ...D 
 
 Bradley 1061 
 
 Lalande 14200 
 
 
 
 ...D 
 
 29 Canis Majoris 
 
 Groombridge 1 299 S P 
 
 Piazzi VII. 100 
 
 
 Cephei 51 S.P. (1883 June 1 1). It is assumed that an error of 5 was made in the reading of the thermometer. 
 Groombridge 1299 S.P. The thermometer was read by the observer as above, but the reading had been 
 accidentally omitted from the computation sheets. 
 
THE EXTERIOR THERMOMETER, IN THK YEARS 1877 TO 1886. (43) 
 
 CORRECTIONS TO REFRACTION OF STARS, &c. continued. 
 
 Date. 
 
 Star's Name. 
 
 R.A. 
 
 1 880-0. 
 
 Thermometer. 
 
 Refraction. 
 
 Correction 
 to 
 Refraction. 
 
 Used. 
 
 Corrected 
 
 1 882 ^ Jan. 24 
 1884 Mar. 29 
 i*S2 April 6 
 
 51 
 
 11 
 
 1882 Jan. 24 
 1882 Mar. 2 
 1883 Mar. 5 
 
 1885 April 22 
 1884 Mar. 24 
 1884 Feb. 25 
 1884 Mar. 20 
 1884 Mar. 24 
 1880 Feb. 17 
 1883 Feb. 23 
 
 1885 Mar. 12 
 1882 Jan. 23 
 1883 July 17 
 
 1884 Mar. 7 
 
 1885 o'ct. 8 
 1880 Mar. 13 
 1882 Mar. 31 
 1884 Mar. 14 
 
 1885 Mar. 30 
 1884 April 10 
 1883 July 17 
 
 1883 Aug. 28 
 
 11 
 1885 July 22 
 
 1885 Aug. 15 
 
 19 
 
 1885 Mar. 30 
 1885 Mar. 30 
 1884 April 9 
 1884 April 10 
 1882 Mar. 27 
 1884 April 9 
 1 88 1 April 7 
 
 l'iax/i VII 97 
 
 h m j 
 
 7- 9-45 
 7.21.47 
 7.26. 56 
 7. 26. 56 
 
 7.27.31 
 7.28.55 
 7-33- ' 
 
 7- 34- 54 
 7-35-31 
 
 7.43- 6 
 7-44- '5 
 7- 44- 30 
 7-45-49 
 7.51-41 
 7- 5'-4 2 
 7-51-54 
 
 7- 53-44 
 7- 56. 45 
 7-57-53 
 8. i. 40 
 8. 2.26 
 8. 2.34 
 
 8. 5.43 
 8. 7.49 
 8. 8. 50 
 
 8. 10. o 
 8. 15. 14 
 8. 19. 40 
 
 8. 19.48 
 8. 21. 52 
 8.21.55 
 
 O 
 
 37-9 
 
 4''3 
 5'7 
 
 J 
 
 J 1 
 
 37'9 
 39-8 
 46-1 
 
 i i 
 63-0 
 41-8 
 42-6 
 
 43'8 
 41-8 
 41-1 
 40-5 
 40-5 
 4''5 
 33'' 
 537 
 
 > 
 
 4 I- 3 
 
 4I 'I 
 49-6 
 
 44-8 
 46-9 
 48-6 
 
 J J 
 
 43'8 
 47-8 
 
 537 
 i > 
 627 
 
 > 
 52-8 
 
 > ? 
 
 567 
 
 J 
 
 43-8 
 43-8 
 
 ' 
 
 47-8 
 
 477 
 45'i 
 40-8 
 
 o 
 
 32-9 
 40-5 
 49-2 
 
 ) 
 
 
 
 32-9 
 39-2 
 44-8 
 
 f 
 
 58-3 
 40-2 
 41-1 
 
 43'o 
 40-2 
 
 4''S 
 
 397 
 397 
 40-2 
 
 327 
 52-9 
 
 > > 
 39'8 
 39-8 
 
 48-7 
 43'i 
 44' 3 
 47'8 
 i i 
 40-6 
 46-5 
 52-9 
 
 
 
 62-0 
 
 ? 
 
 517 
 
 55'3 
 > 
 40-6 
 40-5 
 
 43'5 
 46-1 
 
 457 
 43'' 
 39-1 
 
 
 
 35 
 '53 
 
 20 
 > 
 > > 
 22 
 
 193 
 
 61 
 
 
 58 
 
 '35 
 104 
 104 
 253 
 227 
 67 
 67 
 4' 
 
 211 
 
 '36 
 
 J 
 
 83 
 
 33 
 93 
 27 
 218 
 
 81 
 
 ) 5 
 
 98 
 136 
 126 
 
 > 
 
 124 
 
 ) 
 
 128 
 
 ? 
 
 127 
 
 ? 
 
 53 
 
 204 
 
 83 
 83 
 39 
 131 
 
 44 
 
 
 
 + '37 
 + 0-26 
 
 + O'lO 
 
 > > 
 > 
 + 0-24 
 + 0-24 
 + 0-16 
 j j 
 + o'45 
 + '45 
 + o - 33 
 + 0-17 
 + 0-83 
 0-19 
 
 + O'l I 
 + O'l I 
 + O'l I 
 
 + 0-18 
 
 + 0-22 
 
 * 
 + 0-26 
 + O'lO 
 
 + 0-18 
 
 + O'lO 
 
 + 1-17 
 
 + 'I3 
 > i 
 + 0-65 
 + 0-36 
 
 + 0-21 
 
 + Vl7 
 
 J J 
 + 0-29 
 
 ) 
 
 + 0'37 
 
 ? 
 
 + 0-36 
 
 + ''39 
 
 + 0-27 
 + 0-29 
 + 0-16 
 + 0-54 
 + 0-16 
 
 Lilii'le 14545 
 
 
 Cantor R 
 
 D. 
 
 lira Hoy 1090 
 
 Lulunde 14810 
 
 Proc von R 
 
 ...D. 
 
 
 B F 1071; 
 
 y Moiiocerotis 
 
 
 o Puppis 
 
 Ar 'iis 
 
 W H VII 1289 
 
 W 1> VII 1324-37 
 
 Piax./.i VII 261 
 
 
 Phiz/a VII 2518? R. 
 
 ...D. 
 
 
 
 unbridle 1400 S.P 
 
 
 
 
 D. 
 
 W B XIII 84 
 
 
 57 Cuuielopardi S.P R. 
 
 ...D 
 
 .R 
 
 ...D 
 
 ..R 
 
 ....D. 
 
 ...R 
 
 D. 
 
 
 BD 22 No 22t* .. 
 
 
 
 
 W 15 VIII 538 
 
 
 
 Piazzi VII 97 Bradley 1090. It is assumed that an error of 5 was made in the reading of the thermometer. 
 Procvon (1883 April 22). The reading of the barometer (29">-68) has also been supplied from the meteorological 
 register, the reading previously used being 29' n '73. 
 
(44} 
 
 CORKECTIONS TO REFRACTION FOK R.KVrSED READINGS OF 
 
 CORRECTIONS TO REFRACTION OF STARS, he. continued. 
 
 Date. 
 
 Star's Name. 
 
 R.A 
 
 1 8X0-0. 
 
 Thermometer. 
 
 Refraction. 
 
 Correctior 
 to 
 Refraction. 
 
 Used. (Corrected. 
 
 1885 Auir. 15 
 
 j> 
 1884 April 9 
 1884 April 9 
 1879 F^b. 24 
 1882 Mnr. 2 
 1882 Mar. 6 
 1882 Mar. 27 
 
 1885 April 6 
 1878 Mar. 26 
 1878 Mar. 26 
 1882 Jan. 6 
 1885 Mar. 12 
 1885 Sept. ii 
 
 V 
 
 1884 April 9 
 1879 Aug. i 
 1878 Mar. 26 
 1882 Jan. 6 
 1878 Mar. 26 
 1884 April 9 
 1884 April 10 
 
 1884 April 5 
 1879 April 17 
 1880 May 14 
 1883 Aug. 25 
 1883 Nov. 13 
 1885 April 17 
 1884 Sept. 4 
 1885 Feb. 23 
 1885 April 17 
 1884 Sept. 4 
 1885 April 17 
 1880 Mar. i 
 1885 April 17 
 1880 Mar. i 
 1884 Sept. 20 
 
 > 
 1884 April 22 
 
 1878 April 6 
 1884 Sept. 20 
 
 1880 Mar. i 
 
 A TJrsse Majoris S.P H. 
 
 tl 111 S 
 
 8. 23. 50 
 
 8.24.48 
 8.27.45 
 8.32.29 
 8. 36. 20 
 
 8. 36. 57 
 
 8-49- 3 
 8.51.14 
 8.51.55 
 
 8.55.50 
 8. 57. 50 
 
 8. 57. 54 
 8. 59. 49 
 9- '-'5 
 
 9- 3-15 
 9- 3-26 
 
 9- 3- 27 
 9.21.41 
 
 9-22. 3 
 
 9-23-5I 
 9.31.36 
 
 9-32-59 
 9- 34- 2 9 
 9-35-3 
 9.38.23 
 
 9- 39- 10 
 9.45.56 
 
 9- 5- 4 
 9-53- 5 2 
 10. o. 1 8 
 
 10. i. 23 
 
 10. 4.44 
 10. 9. 1 8 
 
 10. 10. 14 
 
 1*7 
 
 45' 1 
 
 45-1 
 
 287 
 
 39'8 
 43'3 
 477 
 
 4 2 7 
 38-6 
 38-6 
 4.I.-I 
 
 39'9 
 52-9 
 
 42-7 
 56-1 
 38-6 
 41-1 
 38-6 
 4 2 7 
 45'5 
 
 i 
 
 47'i 
 42-8 
 62-8 
 
 577 
 41-7 
 49-8 
 52-2 
 38-6 
 49-8 
 52-2 
 49-8 
 
 437 
 49-8 
 
 437 
 55'5 
 
 ) 
 
 39-8 
 
 1 ? 
 
 4 2 '5 
 
 55'5 
 
 437 
 
 
 
 54'5 
 
 ) 
 
 43-0 
 
 43 ' 
 
 29-4 
 
 38-4 
 40-2 
 
 f5'3 
 
 41*6 
 
 377 
 
 37'5 
 40-0 
 
 38-9 
 
 52-2 
 
 42'O 
 
 55-3 
 37-0 
 
 40-0 
 
 37'0 
 417 
 
 447 
 i 
 46^0 
 417 
 67-8 
 567 
 41-0 
 
 49'4 
 5i-3 
 43-6 
 49-1 
 
 5 - 3 
 49-1 
 39-2 
 48-9 
 39' 2 
 54'9 
 
 ) 
 
 39'5 
 
 ? 
 
 41-8 
 
 54'J 
 
 ) i 
 
 387 
 
 
 
 113 
 
 ? 
 
 37 
 
 54 
 66 
 
 33 
 34 
 33 
 
 63 
 
 59 
 
 5 2 
 48 
 
 75 
 104 
 
 1 5 
 240 
 103 
 
 5 
 5 
 49 
 ii" 
 116 
 
 216 
 
 99 
 96 
 
 122 
 
 95 
 2 33 
 65 
 no 
 
 215 
 
 120 
 
 2O6 
 27 
 52 
 
 53 
 117 
 
 ) ) 
 146 
 
 ) 
 
 116 
 i ii 
 
 ? > 
 44 
 
 + 0'5 ' 
 ? ? 
 + 0-16 
 
 + 0-23 
 
 O'lO 
 + O'lO 
 + O'22 
 
 + 0-16 
 
 J 
 
 + 0-15 
 
 + O'l I 
 + 0'12 
 + O'l I 
 
 + 0-16 
 + 0-14 
 
 + 0-35 
 + 0-17 
 
 + 0-17 
 
 + O'I2 
 
 + 0-17 
 
 + 0-25 
 + 0-19 
 
 + '49 
 
 + 0'22 
 
 - - 95 
 + 0-25 
 + 0-14 
 + 0-18 
 
 + O'I2 
 
 - 0-87 
 + 0-31 
 
 + 0'22 
 
 + 0-29 
 + 0-25 
 
 + O'lO 
 
 + 0-50 
 + 0-14 
 
 J ) 
 + O'lO 
 
 ) > 
 
 + 0-17 
 + 0-32 
 
 ) 
 
 + 0-46 
 
 D 
 
 Pia/M VIIT 86 
 
 W B VIII 671 
 
 o- Hyclrsti 
 
 Y Cancri 
 
 
 ..R. 
 
 D. 
 
 rj Hydrse 
 
 4 Hydra* 
 
 B F 1267 
 
 a Ciincri 
 
 W B VIII 1406 
 
 n- 1 Frsa? Majoris S P R. 
 
 ...D. 
 
 Lacaille 3652 
 
 o- 2 IJrsae Majoris S P 
 
 K Cancri 
 
 
 Piazzi VIII 263 
 
 W B IX 28 
 
 ,..R. 
 
 D. 
 
 Oeltz Arg (8)9575 6 
 
 a HYdrsB 
 
 
 h TJrsjc Majoris S P 
 
 d TJrstB Alajoris S P 
 
 Ijftcaille 3928 
 
 Groombridge 1562 SP 
 
 Bradley 1361 
 
 Oeltz Arg (S ) 10011 
 
 Bradley 1363 SP 
 
 
 
 Bradley 1393 
 
 
 Groom bridge 1609 SP R 
 
 ...D 
 
 Lalande 19750 R 
 
 ,..D 
 
 A Hydras 
 
 32 TJrsp Majoris S P R 
 
 ...D 
 
 37 IjeoniB 
 
 
 h Urs;e Majoris S.P. The correction for index error of the thermometer had been erroneously applied. 
 It Leonis. ir Leonis, 37 Leonis. The thermometer readings previously used appear to be erroneous. The new 
 readings have been supplied from the meteorological register. 
 
THE EXTERIOR THERMOMETER, IN THE YKAHS 1877 TO 1886. (45) 
 
 CORRECTIONS TO REFRACTION OF STARS, &<-. continued. 
 
 Date. 
 
 v:ir'H Name. Jl"*" 
 iSao'O. 
 
 Thermometer. 
 
 Refraction. 
 
 Correction 
 to 
 Refraction. 
 
 Use>l. 
 
 Corrected 
 
 1883 April 9 
 1880 Jan. 26 
 1880 Mar. i 
 1878 April 26 
 1878 April 6 
 1878 April 26 
 
 iSSi May 7 
 Mar. 18 
 1880 Mar. i 
 1882 Feb. 8 
 Sept. 10 
 1880 Mar. i 
 1885 Feb. 19 
 1878 April 6 
 1878 April 6 
 1878 April 26 
 1880 Mar. i 
 1878 April 26 
 1878 April 6 
 Mar. 8 
 1878 April 26 
 1883 Mar. 8 
 1880 Mar. i 
 
 1878 April 6 
 1879 April 24 
 1885 April 25 
 
 
 1879 May 2 
 1883 April 9 
 1878 April 26 
 1880 May 11 
 1884 Sept. 10 
 1880 May ii 
 1882 Mar. 6 
 1 879 Mar. 29 
 1884 April 10 
 1882 Aug. 8 
 1883 April 9 
 1880 Mar. i 
 
 1880 May n 
 1879 Nov. 18 
 1879 Mar. 7 
 1879 Mar. 8 
 
 W H X 204 
 
 h ID a 
 
 10. 13.23 
 
 10.14.15 
 
 10. 15.23 
 io. 18. 56 
 
 10. 19. 16 
 
 io. 20. 17 
 
 IO. 21. 19 
 IO. 21. 40 
 IO. 22. 56 
 
 io. 26. 29 
 
 io. 32. 28 
 io. 36. 26 
 
 10. 38. vS 
 
 10.39. 5 1 
 io. 39. 56 
 
 '0.43.43 
 10.46. 4 
 
 io. 47- 37 
 10.49. 7 
 
 10.49.32 
 
 'o. ,3-35 
 
 io. 53. 56 
 io. 54. 14 
 
 10. 54. 22 
 
 io. 56. 19 
 io. 58. 50 
 >o. 59- 33 
 
 II. 2. 56 
 
 ii. 4. 8 
 ii. 4.30 
 n. 6.33 
 7-43 
 
 ii. 7.57 
 " '5-43 
 ii. 17.53 
 
 
 
 43'9 
 
 23'4 
 42-3 
 49'3 
 42-5 
 49'3 
 49'3 
 607 
 
 47'4 
 42-3 
 33'i 
 
 537 
 42-3 
 377 
 42-5 
 42-5 
 47-6 
 
 *'7 
 
 47-6 
 
 42-5 
 25-8 
 47-6 
 25-8 
 427 
 
 42-5 
 43'' 
 49'9 
 
 ? J 
 
 41-9 
 42-6 
 47-6 
 50-2 
 527 
 50-2 
 
 39'4 
 42-9 
 42*0 
 
 49'9 
 42'6 
 
 4^7 
 
 50-2 
 48-0 
 37'4 
 37'' 
 
 o 
 43'3 
 21-6 
 
 387 
 
 47-9 
 41-2 
 
 47'9 
 47'9 
 59'4 
 467 
 38-0 
 30-8 
 
 527 
 38-0 
 32-8 
 40-5 
 40-5 
 46-8 
 
 377 
 46-8 
 40-5 
 25-2 
 46-2 
 25-2 
 377 
 
 4' 5 
 42-0 
 48-6 
 
 1 
 
 40-9 
 
 ** 
 
 46-0 
 
 49-0 
 
 52-3 
 49-0 
 36-8 
 41-8 
 41-6 
 
 49'3 
 41-9 
 
 377 
 
 1 
 
 48-5 
 47-0 
 36-4 
 38-2 
 
 Il8 
 6l 
 57 
 42 
 53 
 52 
 52 
 140 
 142 
 
 50 
 404 
 176 
 
 5' 
 52 
 
 4' 
 64 
 
 63 
 65 
 
 57 
 37 
 107 
 69 
 80 
 28 
 
 
 
 70 
 70 
 135 
 
 ) ? 
 
 '55 
 126 
 
 63 
 62 
 
 '3' 
 55 
 45 
 288 
 
 455 
 
 99 
 156 
 
 34 
 
 9 
 
 4' 
 118 
 
 7' 
 7' 
 
 + 0-15 
 + 0-24 
 + 0-43 
 
 + O'I2 
 + OM5 
 + OM5 
 + OM5 
 + 0-36 
 + 0'2I 
 + 0-45 
 + '-98 
 + 0-36 
 + 0-46 
 + 0-54 
 
 4- 0-17 
 + 0-27 
 
 + O'l I 
 
 + 0-68 
 
 + O'lO 
 
 + 0-15 
 + 0-13 
 
 + O'2O 
 
 + o-io 
 
 + 0-30 
 
 + 0-29 
 + 0-16 
 
 + 0-35 
 
 > > 
 
 + 0-33 
 4- 0-28 
 
 + O'2I 
 + 0-15 
 
 + o'li 
 + 0-13 
 + 0-24 
 + 0-66 
 + 0-38 
 
 4- O'I2 
 4- 0'22 
 
 4- 0-31; 
 
 1 
 
 + 0-14 
 
 4- 0-24 
 4- 0-14 
 
 - 0-17 
 
 P. F 14.64 . 
 
 
 42 Leonls 
 
 44. JjOoiiis 
 
 
 |v. //i X 67 
 
 
 
 
 
 36 UrsHe Majoris S P 
 
 
 
 
 34 Sextantis 
 
 
 36 Sextant in 
 
 
 
 W B X 760 
 
 B F ic -to 
 
 W B X 844 
 
 
 ...D. 
 
 
 
 L*alunde 21110 R. 
 
 ...D. 
 
 a Crateris 
 
 W B X 951 
 
 
 
 
 
 Lalande (F ) 1729 
 
 
 Piazzi XL 2 
 Oeltz Arg (N ) 11509 S.P 
 
 
 
 ...D. 
 
 
 Piazzi XI 43 S P 
 
 
 
 
 B. F. 1464. 45 Leonis (1880 March i). The thermometer readings previously ued appear to be erroneous. The 
 new readings have been supplied from the meteorological renter. 
 
(46) 
 
 CORRECTIONS TO REFRACTION FOR REVISED READINGS OF 
 
 CORRECTIONS TO REFRACTION OF STARS, &c. continued. 
 
 Date. 
 
 Stars Name. 
 
 R.A. 
 
 1880-0. 
 
 Thermometer. 
 
 Refraction. 
 
 Correction 
 to 
 Refraction. 
 
 Used. 
 
 Corrected. 
 
 1879 April 4 
 1879 April 4 
 
 1879 Mar. 8 
 1879 April 4 
 1879 Mar. 8 
 1879 April 4 
 1880 Mar. i 
 
 5? 
 
 1880 April 22 
 1885 Dec. 8 
 1877 Ma y 8 
 1882 Mar. 2 
 1879 April 4 
 1885 Mar. 20 
 1885 April 13 
 1880 Mar. i 
 
 )> 
 1879 May 9 
 1879 May 6 
 1882 Aug. 8 
 1885 April 27 
 1882 May 26 
 1884 Oct. 3 
 1884 April 21 
 1879 May 30 
 1882 May 26 
 1879 April 1 8 
 1879 July 24 
 1882 April 4 
 1880 Mar. 24 
 1884 May 13 
 
 1877 Oct. 2 
 1882 May 26 
 1883 Mar. 31 
 1882 May 26 
 1 879 May 2 
 1877 May 29 
 1879 Mar. 6 
 1882 April 10 
 1879 May 2 
 
 1880 June 1 8 
 
 79 Leonis 
 
 h in 8 
 II- 17-53 
 I I. 2O. 41 
 II. 20. 42 
 II. 2 1 . 46 
 
 11.21.47 
 I I. 22. 13 
 II. 24. II 
 
 ii. 24. 1 6 
 
 11.25.33 
 H.27. 6 
 I I. 30. 48 
 11.33.47 
 
 11.35.46 
 
 37-47 
 .38.41 
 
 40- 39 
 43- 3 
 44- 54 
 47-31 
 . 48. 36 
 
 1 54- 43 
 
 11.58.34 
 i 2 - 3-57 
 
 12. 6. 25 
 
 12. 9. 
 
 12. 9.25 
 12. 10. l6 
 12. 12. 
 12. 12. 31 
 12. 13. 10 
 12. 13. 46 
 
 12.23.38 
 12.23.39 
 12- 23-39 
 
 o 
 4 I'D 
 
 4i - o 
 ? > 
 37-i 
 41-0 
 
 37'i 
 4.1*0 
 
 427 
 
 ) 
 
 46-4 
 3i-9 
 59'5 
 37'2 
 41-0 
 
 46-3 
 38-6 
 
 427 
 
 ) 5 
 
 40^2 
 4' 3 
 49'9 
 52-3 
 63-3 
 49'9 
 37 
 56-5 
 
 63-1 
 38-5 
 72-1 
 4i-9 
 35'9 
 55'9 
 
 ? ? 
 
 44-6 
 62-8 
 
 39 - 5 
 62-8 
 
 4'3 
 53-1 
 
 37'i 
 42-9 
 
 4'3 
 
 ) J 
 
 66-5 
 
 
 
 397 
 397 
 
 3 8 : 2 
 
 397 
 38-2 
 
 397 
 38-0 
 
 45'4 
 31-1 
 49-6 
 36-8 
 
 397 
 45-8 
 
 377 
 38-1 
 
 39-3 
 39'3 
 49-2 
 50-9 
 
 58-3 
 48-9 
 
 367 
 
 54'4 
 58-, 
 
 37'5 
 70-8 
 41-4 
 34'8 
 55'2 
 
 437 
 57'2 
 38-8 
 57-2 
 39-6 
 52-1 
 
 36-5 
 42-1 
 39-6 
 
 ) J 
 
 65-5 
 
 69 
 65 
 
 
 
 6 7 
 65 
 6 7 
 
 65 
 1 1 
 
 79 
 99 
 4i 
 422 
 
 74 
 126 
 128 
 16 
 
 ) 
 
 92 
 
 154 
 133 
 40 
 84 
 203 
 243 
 55 
 55 
 64 
 184 
 196 
 82 
 103 
 
 9 2 
 29 
 84 
 
 7i 
 
 102 
 
 7' 
 76 
 
 74 
 142 
 
 9 
 
 '33 
 
 + 0-18 
 + 0-18 
 
 ? > 
 - 0-15 
 + 0-17 
 0-16 
 + 0-17 
 
 + O'll 
 
 > j 
 + 0-18 
 + 0-17 
 + 076 
 + o-35 
 
 + 0-20 
 + 0-13 
 + O - 22 
 
 + o 16 
 
 5 5 
 
 + 0-17 
 + 0-32 
 + 0-19 
 
 + 0'12 
 + 0-84 
 + 0-42 
 
 + ro2 
 + 0-24 
 
 + '55 
 + 0-13 
 + 0-46 
 
 + 0'20 
 
 + 0-19 
 + 0-15 
 
 + 0-17 
 + 0-32 
 + 0-24 
 + 0-80 
 + 0-15 
 + 0-14 
 
 + O'lO 
 + O'I2 
 + O'2I 
 
 ? ^ 
 + 0-27 
 
 83 Leonis 
 
 Piazzi XI. 71 
 
 T Leonis 
 
 
 W. B. XI 34.0... 
 
 
 Piazzi XI. 74 R 
 
 ...D 
 
 e Leonis 
 
 A Draconis S.P 
 
 88 Leonis 
 
 Bradley 1580 
 
 f Leonis 
 
 W. B. XI. 563 
 
 
 3 Draconis R 
 
 D 
 
 Piazzi XI. 148 
 
 '(, Crat eris 
 
 Groombridge 1826 S P 
 
 B. F. 1658 
 
 Piazzi XL 167 
 
 y Ursse Majoris S.P 
 
 Lalande 22439 
 
 JT Virginia 
 
 
 Piazzi XI 227 
 
 Corvi 
 
 
 W B XII 69 
 
 W. B XII 107 R 
 
 ...D 
 
 Groombridge 1863 SP 
 
 7 Coma? 
 
 Piazzi XII. 32 
 
 1 3 Virginis 
 
 14 Virginis 
 
 77 Virginis 
 
 
 
 S 1 Corvi 
 
 S 2 Corvi ; 
 
 
 
 X Draconis S.P. The automatic register having failed on this day. the reading of the thermometer has been 
 interpolated from neighbouring readings. 
 88 Leonis. The thermometer was read by the observer as above, but the reading had been accidentally omitted 
 from the computation sheets. 
 Piazzi XI. 167, IT Virginia (1882 May 26). It is assumed that an error of 5 was made in the reading of the 
 thermometer. 
 
THK EXTKKIOH THERMOMETER, IN THE YEARS 1877 TO 1886. 
 CORRECTIONS TO REFRACTION OF STARS, &c.contintted. 
 
 (47) 
 
 Date. 
 
 Star's Name. ,*, 
 
 Thermometer. 
 
 Refraction. 
 
 Correction 
 to 
 Refraction. 
 
 Used. 
 
 Corrected. 
 
 1884 April 21 
 
 1882 May 26 
 1877 May 3 
 1882 April 4 
 1884 Sept. 29 
 
 1882 May 27 
 1880 May 29 
 1881 Mar. 25 
 1884 May 20 
 1882 Jan. 9 
 1884 May 13 
 1884 May 20 
 
 1883 Mar. 23 
 1883 May 17 
 1882 Jan. 9 
 1879 Mar. 6 
 1884 May 13 
 1882 Jan. 9 
 1 88 1 May u 
 1885 Mar. 2 
 1885 May 15 
 
 1883 May 23 
 1 88 1 May n 
 1883 May 17 
 1880 April 23 
 1879 June 9 
 1883 June 4 
 1881 May 7 
 1883 April 4 
 1884 Sept, 29 
 1879 May 31 
 1 88 1 July 4 
 1882 April 4 
 1883 April 3 
 1883 May 24 
 1883 Dec. 14 
 1 88 1 May 7 
 1879 June 9 
 1885 April 17 
 1885 May 2 
 1885 May 2 
 
 P Corvi R 
 
 h in 
 12.24.5! 
 
 12.28. 5 
 
 12. 3O. 28 
 
 '2-33- 3 
 '2- 35-35 
 
 '2-35-45 
 
 12. 42. I I 
 
 12.48. 4 
 
 12.48. 7 
 
 12.48.45 
 12.49.34 
 
 12. 56. 12 
 
 12.57. 5 
 12.57.21 
 
 12. 57.44 
 
 13. o. 14 
 '3- i-37 
 
 13. 2. 17 
 >3- 3-44 
 
 13. 12.24 
 
 13. 12.32 
 
 13. 18. 52 
 
 13.21. 3 
 13.21.54 
 
 13.26.27 
 
 13-28- 3 
 13.28.35 
 13.30. 9 
 3-3. 9 
 
 36-0 
 
 > > 
 62-8 
 38-0 
 41-9 
 52-9 
 
 
 
 59'3 
 
 53'9 
 32-8 
 52-1 
 42-0 
 
 54'4 
 52-1 
 
 > 
 
 25-6 
 
 53'9 
 42*0 
 
 37 - i 
 
 54'4 
 42-0 
 42-0 
 36-5 
 49 - 9 
 
 > ? 
 
 63-3 
 42-0 
 
 53'9 
 
 47'9 
 56-7 
 
 6r6 
 55-8 
 48-9 
 50-9 
 
 SI'S 
 86-0 
 40-5 
 
 47'3 
 58-2 
 
 45-i 
 55-8 
 
 55'3 
 43-8 
 447 
 447 
 
 o 
 35'4 
 
 > 
 
 55'9 
 37'5 
 40-6 
 5 I-6 
 
 i > 
 
 58-8 
 
 53'3 
 3''9 
 5'"3 
 41-4 
 
 53-6 
 50-8 
 
 > > 
 25-0 
 
 53'4 
 41-4 
 
 35'9 
 53'4 
 41-1 
 41-2 
 
 35 - 4 
 49-0 
 
 
 
 65-3 
 41-2 
 52-9 
 
 47-2 
 56-, 
 60-6 
 52-1 
 48-2 
 50-0 
 50-5 
 84-5 
 4i - o 
 47-8 
 57-2 
 45-8 
 5''5 
 54'4 
 42-5 
 43'3 
 4.V3 
 
 142" 
 
 9 
 
 '9 
 206 
 
 206 
 64 
 > 
 94 
 75 
 77 
 94 
 127 
 no 
 in 
 
 j * 
 
 107 
 
 102 
 I 80 
 
 66 
 
 48 
 123 
 176 
 
 83 
 81 
 
 ) 
 
 756 
 
 I 10 
 
 107 
 
 100 
 
 86 
 85 
 
 201 
 2OI 
 
 99 
 
 107 
 
 IO2 
 III 
 I 10 
 
 '33 
 122 
 I 3 2 
 62 
 
 74 
 252 
 252 
 
 + 0-18 
 
 s ? 
 + 0-26 
 + O'2I 
 + 0-56 
 + 0-17 
 
 J 
 + O'lO 
 
 + o-io 
 + 0-14 
 + 0-15 
 + 0-16 
 + 0-18 
 + 0-29 
 i > 
 + 0-14 
 
 + O'lO 
 + 0'22 
 + 0-17 
 + O'lO 
 + 0'22 
 + 0-29 
 
 4- 0-19 
 + 0-15 
 
 j 1 
 
 - 3'39 
 4-. 0-19 
 
 4- O'22 
 + 0-14 
 
 + o-ii 
 
 + 0-17 
 + 1-51 
 
 + 0-28 
 
 + 0-18 
 
 4- O'22 
 
 4- 0-30 
 
 O'l I 
 
 o-i i 
 
 + 0-27 
 
 0-18 
 + 1-15 
 
 + O'l I 
 4- O'2O 
 
 + 0-73 
 
 4- 073 
 
 ...D 
 
 4 Dracoiiis 
 
 fi Corvi 
 
 
 Groombridge 1909 SP R 
 
 ..D 
 
 Y Virginia 
 
 y Virginia (both Stars) 
 
 
 28 Virginia 
 
 Groombridge 1926 S.P 
 
 W. B. XII 793 .. . 
 
 R. 
 
 ...D 
 
 >// VirginiH 
 
 
 t Uraae Majoris S.P 
 
 c Virginia 
 
 t Virginia 
 
 Piazzi XII. 255 SP 
 
 Lalande 24277 
 
 48 Virginia 
 
 ...R. 
 
 ,..D. 
 
 Lacaille 5400 
 
 ff Virginia 
 
 
 B. F. 1805 
 
 6 Virginia 
 
 
 y H Y drse . . 
 
 
 Lalande (F.) 2236 S.P 
 
 Spica 
 
 
 
 
 69 Virginia 
 
 Piazzi XIII. 96 SP 
 
 75 Vir^inis 
 
 78 Virginia 
 
 Virginia 
 
 Cape (1880) 74. CA 
 
 Piazxi XIII. 135 
 
 
 y 1 and jr* Virginia (1880 May 29 and 1881 March 25). The thermometer was read by the obierver. but the 
 reading had been accidentally omitted from the computation sheets. 
 Lacaille 5400. The correction for index error of the thermometer had been erroneously applied. 
 y Hydra 1 . 75 Virginia. It is assumed that the reading of the interior thermometer wan entered by mistake. 
 
(48) CORRECTIONS TO REFRACTION FOR REVISED READINGS or 
 
 CORRECTIONS TO REFRACTION OF STARS, & c. continued. 
 
 Date. 
 
 Star's Name. 
 
 R.A. 
 
 1880-0. 
 
 Thermometer. 
 
 Refraction. 
 
 Correction 
 to 
 Refraction. 
 
 Used. 
 
 Corrected. 
 
 1885 May 2 
 1 88 1 May 11 
 1883 May 24 
 1884 May 23 
 1878 June 10 
 1877 Nov. 14 
 1883 May 23 
 1884 May 29 
 1880 Feb. 4 
 1883 May 24 
 1884 June 14 
 
 >? 
 1879 May 19 
 
 
 1882 May 19 
 1879 May 30 
 1882 May 16 
 1883 May 23 
 1879 June 4 
 1882 Feb. i 
 1877 May 3 
 1878 Oct. 14 
 1882 May 1 6 
 1881 May 12 
 1880 Feb. 13 
 1880 July 15 
 1 88 1 May 7 
 1882 May 29 
 1883 June i 
 1885 May 15 
 1883 June 8 
 1885 May 15 
 1885 June 2 
 
 )> 
 1 880 Feb. 1 3 
 1 88 1 May 3 
 1 88 1 May u 
 1885 June 2 
 
 * 
 1885 June 12 
 1883 May 7 
 1885 May 20 
 1880 May 28 
 1885 Jan. 8 
 
 m Virginia 
 
 h in g 
 
 "3- 35- 9 
 13-39- 7 
 I3-40-53 
 
 13.40.54 
 13.42.49 
 13. 46. 1 8 
 13.47.29 
 13.47.56 
 13.48.41 
 13.48.58 
 
 13-53- 2 
 
 '3- 55- 2 4 
 I3-55-3Z 
 13.56. 4 
 
 13-59-57 
 14. 1.51 
 14. 2. 37 
 14. 6. o 
 14. 6. 30 
 14. 8.47 
 
 14. 9. 20 
 
 14. 10. ii 
 
 14. 12. 
 
 H. 12.37 
 
 H- '3-33 
 14. 16. 58 
 14. 17.29 
 14. 20. 52 
 
 14.27.48 
 14. 28. 6 
 
 H-35- 2 5 
 
 H-39- 3 
 H- 39- 4 
 14.39. 14 
 14.40. ii 
 14.42.45 
 
 
 
 447 
 40-8 
 57-0 
 57-1 
 
 56-3 
 42-4 
 63-6 
 47-8 
 38-1 
 57-0 
 60- 5 
 
 5 
 
 49'4 
 
 J 
 
 50-4 
 51-0 
 46-1 
 63-6 
 51-6 
 33'8 
 
 34' 6 
 5o'o 
 
 46' i 
 
 46^0 
 
 437 
 69-8 
 51-2 
 61-8 
 58-3 
 477 
 55'3 
 477 
 597 
 
 437 
 39' 
 39-3 
 597 
 
 1 ? 
 
 59'9 
 
 437 
 
 44'9 
 51-9 
 
 29-5 
 
 o 
 
 43'' 
 39' 6 
 56-3 
 56-1 
 55-6 
 
 44'4 
 62-8 
 46-9 
 
 38-8 
 
 55'9 
 59-1 
 
 47'5 
 
 ) j 
 
 48-3 
 49'5 
 42-1 
 
 62-0 
 
 507 
 32-0 
 
 34' ' 
 49-1 
 
 43'* 
 
 45' 1 
 
 42-3 
 
 67-0 
 50-6 
 61-3 
 
 57 - 4 
 467 
 
 54" ' 
 46-3 
 
 57'3 
 
 40-9 
 
 38-4 
 38-6 
 
 567 
 
 59-0 
 
 43'3 
 44-0 
 
 49'9 
 28-7 
 
 99 
 138 
 
 101 
 102 
 144 
 
 283 
 416 
 
 33 
 118 
 
 95 
 
 37 
 
 J 1 
 
 32 
 ? > 
 32 
 52 
 69 
 405 
 
 99 
 55 
 108 
 
 77 
 107 
 
 154 
 
 7' 
 
 34 
 158 
 118 
 69 
 
 I 12 
 52 
 36 
 
 35 
 
 -6 
 '75 
 
 177 
 44 
 
 232 
 
 235 
 199 
 67 
 129 
 
 + '33 
 + '35 
 + 0-15 
 
 + 0'2I 
 + 0'2I 
 
 i'i7 
 + 0-67 
 + 0-56 
 0-18 
 + 0-14 
 
 + 0'12 
 
 ) ? 
 + 0-13 
 
 ) 
 + 0-14 
 
 + 0-16 
 + 0-57 
 
 + i - 3 
 + 0-18 
 
 + 0'21 
 + O'l I 
 
 + 0-15 
 + 0-65 
 + 0-29 
 
 + 0'2I 
 + 0-19 
 + O'2C 
 + O'l 2 
 + O'lO 
 + 0-23 
 
 + 'i 3 
 
 + O'l I 
 
 + 0-17 
 
 + '44 
 
 + O'2I 
 + 0-25 
 + 0-26 
 
 ? 
 
 + 0-42 
 + O-ig 
 + 0-38 
 + 0-27 
 + 0-22 
 
 8 c Virginis 
 
 B F 1886 
 
 
 87 Virginia 
 
 y Ursae Majoris S P 
 
 h Centauri 
 
 Piazzi XIII 230 . 
 
 i Draconis S P . . . . 
 
 Bradley 1820 ... 
 
 >? Bootis R. 
 
 ...D 
 
 i o Bootis R. 
 
 ...D 
 
 
 W B XIII 932 
 
 
 Lacaille 5791 
 
 QA. Vinrinis .. 
 
 Groombridge 2099 S P ... 
 
 96 Virginis 
 
 3 Ursse Minoris S.P 
 
 K Virginis 
 
 Piazzi XIV 22 
 
 4 TJrs3G Minoris SP 
 
 Arcturus . . . . 
 
 Laltinde 26150 .. 
 
 \ Virginis 
 
 W B (2) XIV 213 
 
 2 Li brse 
 
 Piazzi XIV. 69 (N. & S. Stars)... 
 f Bootis 
 
 ...R. 
 
 ..D. 
 
 5 Ursse Miiioris S.P 
 
 Piaz/i XIV 116 
 
 
 Bootib R. 
 
 D. 
 
 r^ Hydras fist Star) 
 
 54 Hydrae (ist and 2nd Stars)... 
 Lalande 26855 
 
 1 09 Virginis 
 
 IL Librae 
 
 
 ; Draconis S.P. The automatic register having failed on this day. the reading of the thermometer has been 
 interpolated from neighbouring readings. 
 j) Bootis. The reading of the barometer (so 1 "' 17) has also been supplied from the meteorological register, the 
 reading previously used being 3o in 'i(>. 
 54 Hydra (1883 May 7). The correction for index error of the thermometer had been erroneously applied. 
 
THE EXTEUIOB TlIEUMOMETEH, IX THE YlCAHb 1877 TO 1886. (49) 
 
 CORRECTIONS TO INFRACTION OF STARS, &c. continued. 
 
 Date. 
 
 Star's Name. 
 
 BJL 
 
 i Sho'o. 
 
 Thermometer. 
 
 Ruf ruction. 
 
 Correction 
 to 
 Refraction 
 
 rjMd. 
 
 OorrecUxl. 
 
 1877 May 3 
 1879 June 9 
 
 i 
 
 1882 June 27 
 1883 June 4 
 
 n 
 1883 June 8 
 
 1883 July 13 
 1884 May 29 
 
 188; May 23 
 1881 May 12 
 1883 Dec. 14 
 1883 July 13 
 1883 Jane 8 
 
 i 
 1884 May 29 
 
 > 
 1885 June 9 
 1885 May 15 
 1883 May 31 
 1883 July 6 
 
 
 
 1884 June 14 
 1884 May 8 
 1 88 1 April 30 
 1 88 1 June 2 
 1882 June 23 
 1884 June 25 
 1885 June 17 
 1880 April 30 
 1 88 1 April 30 
 1881 June 2 
 1882 June 23 
 1884 June z 
 1885 June 18 
 
 1884 July i 
 1 88 1 May 3 
 1885 May 23 
 1883 June 16 
 1884 June 2 
 
 8 Libras 
 
 h m K 
 
 14.44. 3 
 14.44. H 
 
 14.44.52 
 14.45.14 
 14.51. 4 
 H-5'-43 
 
 14.55. 6 
 
 15. o. 7 
 15. 5.23 
 15. 6.37 
 15.10.33 
 
 15. 14. 19 
 15. 16. 20 
 
 15. 17. 17 
 
 I5-I9-57 
 15. 20. 56 
 15.21.29 
 
 15.27.58 
 15.28.49 
 
 15.30.44 
 15.32. o 
 
 15.37.19 
 15.38.21 
 
 
 
 34-6 
 S 2-6 
 
 > 
 
 66-2 
 57'i 
 
 9 
 
 54-0 
 
 * I 
 
 63-1 
 46-6 
 
 > 
 48-0 
 
 44-5 
 43'5 
 58-5 
 54-0 
 
 9 
 
 46-6 
 
 9 9 
 
 53-4 
 45-6 
 
 53' 
 65-3 
 
 9 9 
 
 56-1 
 50-8 
 4 6 '3 
 577 
 56-4 
 
 637 
 55'9 
 5i'3 
 46-3 
 
 577 
 56-4 
 51-0 
 56-6 
 
 9 9 
 
 64-8 
 
 37'9 
 467 
 50-0 
 51-0 
 
 o 
 
 3 2-8 
 51- 9 
 
 > i 
 64'! 
 56-3 
 j 
 
 53-0 
 
 > 
 62-1 
 
 45 - 9 
 
 ) 9 
 
 47'3 
 43-8 
 44-6 
 62-1 
 53-0 
 
 9 
 
 45'' 
 
 ) 9 
 
 5^5 
 44' 5 
 50-9 
 64-0 
 
 
 
 55-o 
 50-4 
 44-8 
 56-9 
 56-0 
 62-7 
 52-0 
 52-1 
 44-6 
 56-9 
 
 55-6 
 50-1 
 56-0 
 j j 
 637 
 36-4 
 46-2 
 48-6 
 50-1 
 
 i 
 
 '39 
 '35 
 > > 
 132 
 
 "34 
 
 9 1 
 
 "34 
 
 9 
 
 13' 
 
 '37 
 > i 
 136 
 
 '5 
 
 86 
 
 *4 
 1 08 
 
 9 9 
 
 80 
 
 9 9 
 
 139 
 166 
 
 36 
 98 
 
 
 
 102 
 
 '34 
 '3 
 129 
 129 
 "3 
 '4 
 88 
 140 
 140 
 '39 
 
 100 
 
 127 
 
 9 9 
 
 49 
 165 
 161 
 
 '34 
 56 
 
 
 
 + '53 
 + 0-19 
 
 > 
 + 0-55 
 
 + 0'22 
 
 1 I 
 
 + 0-28 
 
 1 J 
 + 0-26 
 + O'tO 
 1 f 
 + 0'2O 
 + 0'22 
 O'2O 
 
 - 0-18 
 
 + O'22 
 9 f 
 + 0-25 
 
 ) 
 + 0-25 
 
 4- 0-38 
 + 0-16 
 
 + 0-25 
 
 
 + 0-23 
 
 + O'l I 
 
 f 0-40 
 
 + - 2I 
 + O'lO 
 
 + 0-23 
 
 + O'l I 
 
 - 0-15 
 + 0-49 
 
 f O'22 
 + O'22 
 -f OM9 
 + 0-15 
 
 i ? 
 + OMO 
 
 + 0-62 
 
 + 0-17 
 + 0-38 
 
 + O'l I 
 
 
 a Libra) 
 
 
 R 
 
 D 
 
 R 
 
 D 
 
 
 !> 
 
 ,. D 
 
 
 Bradley 189^ 
 
 6 Ursse Minoris S P 
 
 /3 Ur88e Minoris 
 
 1 7 Libra; R 
 
 D 
 
 Piazzi XIV. 239 R 
 
 ...D 
 
 y* Libras 
 
 
 W B (2) XV. 1 06 
 
 ft Librae R 
 
 ...D 
 
 
 o l Librae 
 
 o 1 Librae 
 
 
 
 Piazzi XV. 54 
 
 
 y Ursa3 Minoris S P 
 
 
 
 
 B F. 2110 
 
 y Librae R. 
 
 .. D 
 
 
 
 
 f) Libras 
 
 a Serpentis 
 
 
 ft Ursa; Minoris. The reading of the barometer (29'" -66) has lo been supplied from the meteorological register, 
 the reading previously used being 29 '''67. 
 ft Libre (1883 July 6). The thermometer was read by the observer as above, but accidentally omitted from the 
 computation sheets. 
 
 GREENWICH OBSERVATIONS, 1887. 
 
(50} CORRECTIONS TO REFRACTION FOR REVISED READINGS OF 
 
 CORRECTIONS TO REFRACTION OF STARS, &c. continued. 
 
 Date. 
 
 Star's Name. 
 
 R.A. 
 
 1 880-0. 
 
 Thermometer. 
 
 Refract.oii. 
 
 Correction 
 to 
 Refraction. 
 
 Used. 
 
 Corrected. 
 
 1879 April 28 
 1883 June 4 
 1885 Nov. 30 
 
 ? 
 1881 June 22 
 1884 June 14 
 1885 June 12 
 1882 June 27 
 1885 My 1 6 
 1884 June 12 
 1879 July 28 
 1882 June 27 
 1885 June 2 
 1884 June 14 
 1882 June 23 
 1879 May 20 
 
 
 1878 June 7 
 1883 July 13 
 1882 July 15 
 1879 June 10 
 1878 June 26 
 1885 June 27 
 1885 June 13 
 1885 June 26 
 1 88 1 June 2 
 1885 July 14 
 1885 July 14 
 1879 June ii 
 1883 July 2 
 1884 July 7 
 1880 Aug. 9 
 
 1884 July 7 
 1885 July 22 
 1883 July 17 
 1884 Aug. i 
 1885 June 2 
 1885 Sept. 3 
 1885 July 22 
 1883 July 4 
 1877 June 23 
 1883 July 4 
 1880 Aug. 9 
 
 
 Groombrid nr e 2286 
 
 h m w 
 
 15-39- 54 
 15.41.43 
 15.44.20 
 1 5. 44. 44 
 15.46.25 
 
 1 5. 46. 44 
 15.46.47 
 15.47. o 
 15.50.40 
 15-50-55 
 15-53-I4 
 I5-53.36 
 15.54.54 
 
 l6. 0.22 
 
 16. 5. o 
 16. 5. i 
 16. 5.26 
 16. 5.37 
 16. 8. 3 
 16. 16. 38 
 16. 19.53 
 16. 22. 3 
 1 6. 24. 1 6 
 1 6. 24. 52 
 16.30. 3 
 16.34.38 
 16.34.41 
 16.48. 25 
 16.49. 6 
 16. 54. 7 
 16.55.42 
 
 17. 0.40 
 17. 1.17 
 
 17. 2. 2 
 17. 3.30 
 
 17. 6.48 
 17. 7.46 
 17. 7.58 
 
 I/. 8.26 
 
 
 
 38-8 
 
 557 
 45-8 
 
 ? > 
 
 55'3 
 54'9 
 57'9 
 62-9 
 
 44' 5 
 58-2 
 67-0 
 62-9 
 56-4 
 
 54'9 
 54'3 
 51-0 
 
 1 ) 
 
 56-1 
 
 58-3 
 61-6 
 
 53' 
 70-8 
 52-9 
 56-7 
 
 5'7 
 56-1 
 
 58-7 
 58-7 
 58-7 
 68*7 
 61-9 
 65-9 
 
 i * 
 61-9 
 
 57'9 
 56-6 
 65-9 
 54-6 
 63-9 
 
 57'9 
 55-8 
 51-0 
 55-8 
 65-9 
 
 ! 1 
 
 
 
 37'3 
 54-0 
 
 4S'i 
 
 ) 
 
 54-8 
 54-0 
 56-9 
 62-0 
 437 
 557 
 657 
 61-6 
 
 55'2 
 53-8 
 53-0 
 50-0 
 ? i 
 55'4 
 577 
 58-9 
 
 5'-4 
 68-9 
 
 52'3 
 
 55'9 
 50-8 
 
 55'3 
 577 
 577 
 5^3 
 66-7 
 
 61-3 
 63-2 
 
 j 
 60-9 
 56-8 
 55'3 
 65-3 
 
 53-4 
 62-8 
 
 56-3 
 
 55'4 
 50-2 
 
 55'4 
 62-4 
 
 > > 
 
 H 
 3 6 
 
 43 
 
 186 
 
 J > 
 
 231 
 235 
 
 221 
 209 
 142 
 
 177 
 40 
 192 
 
 139 
 62 
 
 '75 
 163 
 
 ) J 
 
 103 
 97 
 79 
 36 
 42 
 258 
 140 
 68 
 78 
 62 
 62 
 
 20 
 I 3 8 
 
 449 
 
 21 
 
 ) ) 
 
 75 
 149 
 
 74 
 132 
 136 
 131 
 5 
 258 
 261 
 259 
 15 
 
 5 ) 
 
 H 
 
 + O'll 
 
 + 0-15 
 + 0-26 
 
 > 
 
 + 0-23 
 + '43 
 + '45 
 + '37 
 + 'Z3 
 + 0-90 
 
 + O'lO 
 
 + 0-50 
 
 + '34 
 + 0-14 
 
 + '45 
 + '34 
 
 ) 5 
 + 0-I4 
 
 + O'l I 
 
 + 0-42 
 
 + O'I2 
 + O'l6 
 + 0-32 
 
 + '23 
 + O'I2 
 + 0'12 
 + - I2 
 + 0'12 
 + O-26 
 + C'I2 
 
 + '54 
 
 + 0'12 
 
 i ? 
 + 0-15 
 + 0-32 
 + O-ig 
 
 + 0-16 
 + 0-32 
 + 0-30 
 + 0-17 
 
 + O'2O 
 + 0-48 
 + O'2O 
 + O'lO 
 
 5 J 
 
 v Sfcrpeiitis 
 
 Oeltz. Arg (N ) 15662 S P 
 
 Oeltz Ar<* (N ) 1 5666 8 P 
 
 A Scorpii . . ... 
 
 
 Bradlev 2009 
 
 Piazzi XV 192 
 
 8 Librae 
 
 B. F 2173 . 
 
 y Serpentis 
 
 S Scorpii 
 
 49 Librae 
 
 3 Herculis . . . 
 
 
 Piazzi XVI 3 
 
 v Scorpii 
 
 ^ Scorpii 
 
 1 6 Hcoi-pii 
 
 f> Ophiuchi .... 
 
 y Herculis 
 
 w Herculis 
 
 Antures 
 
 <t> Opliiuchi 
 
 A Ophiuchi 
 
 12 Ophiuchi 
 
 in 1 Herculis 
 
 in 2 Herculis 
 
 53 Herculis 
 
 Piazzi XVI 232 
 
 Piazzi XVI 255 
 
 f Herculis R 
 
 D 
 
 W B XVI 1125 
 
 Piazzi XVI 297 
 
 Piazzi XVI 303 
 
 7) Ophiuchi 
 
 
 
 37 Ophiuchi 
 
 Oeltz "Vr" (S ) 16505 
 
 A Ophiuchi (both Si .rs) 
 
 ?> 
 4 Draconis R 
 
 ...I) 
 
 
 A Scorpii (1881 June 22). The thermometer was read by the observer, but the reading had been accidentally 
 omitted ill the computat on sheets. 
 Piazzi XVI. 232. The reading of the barometer (:9 in '9o) has also been supplied from the meteorological 
 register, the reading previously used beinpr 29 in 'yg. 
 
TIIK ExTKUIOR TlIEKMOMETER, IX THE \~KAHS 1877 TO 1886. (51) 
 
 CORRECTIONS TO REFRACTION OF STARS, &c. continued. 
 
 Date. 
 
 Star's Xaine. 
 
 R.A. 
 
 1880-0. 
 
 Thermometer. 
 
 Refraction. 
 
 Correction 
 to 
 Refraction. 
 
 Used. 
 
 Corrected 
 
 1883 July 4 
 1882 June 27 
 188). July 9 
 1877 June 2-, 
 1883 July 4 
 1884 Aug. ii 
 
 
 1885 July 14 
 
 
 1878 Oct. 7 
 1879 Aug. 6 
 1885 July 14 
 
 1883 July 4 
 
 1883 Nov. 23 
 1884 July 5 
 1883 July 4 
 
 1883 Dec. 15 
 
 1884 July 7 
 1884 July 7 
 1884 Aug. i 
 1884 Sept. 10 
 1884 Aug. i 
 1877 Aug. 14 
 1883 Aug. 13 
 1885 July ii 
 1878 Sept. 26 
 1880 July i^ 
 1885 June 18 
 1881 May 15 
 1882 Aug. 23 
 1885 June 26 
 1884 Aug. 5 
 1877 Aug. 14 
 1878 June 18 
 1878 Aug. 7 
 
 
 1880 July 15 
 1880 July 22 
 
 * 
 1880 Aug. 9 
 
 l'i-i//i XVII 45 
 
 h m B 
 
 17- 12-35 
 17. 14.38 
 
 17.15.49 
 
 17. 18. 14 
 
 17. 20. 1 6 
 
 17. 20. 1 8 
 
 17.20.34 
 17.24. 6 
 17.28. 6 
 
 17. 29. 22 
 17.36. 14 
 
 7- 37- 33 
 
 '7.37-39 
 
 17.46.31 
 17.48.51 
 17.52. 52 
 i7- 54- 9 
 17.54.25 
 1 8. 0.29 
 
 1 8. o. 51 
 1 8. 1.40 
 
 1 8. 6.35 
 18. 10. 32 
 
 18. II. 2 
 
 
 
 55-8 
 
 58-5 
 65-5 
 51-0 
 55-8 
 
 77'9 
 
 
 
 56-9 
 
 J 
 63'O 
 
 56-7 
 56-9 
 
 1 
 
 55-8 
 
 j > 
 40-6 
 61-8 
 55-8 
 
 
 40-8 
 
 1 ? 
 
 60-6 
 60-6 
 
 637 
 58-8 
 
 637 
 
 63-5 
 66-2 
 
 6 3'4 
 55-8 
 63-0 
 54-0 
 47'5 
 54' i 
 49-0 
 
 59'4 
 63-5 
 54'2 
 64-4 
 
 5 > 
 63-0 
 58-6 
 
 ) J 
 
 65-9 
 
 
 
 55'I 
 58-2 
 64-5 
 50M 
 
 547 
 77-0 
 
 > 
 56-2 
 
 > 
 62-0 
 
 557 
 56-0 
 
 ? 
 54'3 
 
 J 
 
 44-0 
 on 
 
 54'3 
 
 
 
 39'5 
 
 > 
 
 59-6 
 59-6 
 63-3 
 |77 
 63-3 
 62-4 
 65-7 
 62-5 
 
 54 - 4 
 6ro 
 
 53' 
 46-7 
 
 537 
 48-5 
 58-6 
 62-1 
 
 62-8 
 
 
 6ro 
 
 57'3 
 
 ? 
 
 6o'5 
 
 a 
 
 79 
 231 
 
 2Z 5 
 299 
 
 5* 
 
 82 
 
 ? 
 
 "7 
 
 * i 
 
 60 
 
 2'3 
 1 1 1 
 
 > 
 46 
 
 > 
 
 47 
 183 
 6l 
 
 > 
 
 99 
 
 
 
 68 
 156 
 
 170 
 82 
 
 H3 
 
 302 
 302 
 '43 
 5' 
 5' 
 5' 
 1 80 
 178 
 184 
 *74 
 
 39 
 
 40 
 
 39 
 
 > > 
 40 
 40 
 
 * 
 
 40 
 
 i 
 
 4- OMI 
 + 0-13 
 
 + '44 
 + 0-6 1 
 
 + OM2 
 + OM4 
 > 
 + 0-17 
 
 
 + OM2 
 
 + '44 
 
 + O'2I 
 
 
 + 0-13 
 
 J J 
 
 - '34 
 + 0-25 
 + 0-18 
 i 
 
 + 0-27 
 
 9 J 
 + 0-I4. 
 + O^I 
 + 0-14 
 
 + 0-18 
 
 + 0'I2 
 
 + 0-66 
 + 0-31 
 + 0-26 
 + 0-14 
 + 0-19 
 + o-u 
 + 0-30 
 + 0-14 
 + 0-19 
 + 0-45 
 + o-u 
 
 + 0-17 
 
 + 0'12 
 > 
 
 + 0-16 
 
 + O'l I 
 
 * i 
 + 0-43 
 
 
 
 43 Ophiuchi 
 
 Pia/./.i XVI 1 84 
 
 Pia/'/i XVII 99 R 
 
 ...D 
 
 
 ...I) 
 
 
 
 W B XVII 493 R. 
 
 ...I). 
 
 
 ...D. 
 
 
 58 Ophiuchi 
 
 $ Ophiuchi R 
 
 ,..D. 
 
 u> Draconis S.P R. 
 
 D 
 
 Piazsi XVII 266 
 
 Pi ix7i XVII 277 
 
 Phisf/i XVII 304 
 
 
 
 Piazzi XVII 359 
 
 
 Oeltz Ar" (S ) 17670 
 
 
 
 
 
 
 
 Pia/zi XVIII. 24 
 
 
 
 ...R 
 
 ...D. 
 
 
 ::::::;::::::::::: 
 
 D. 
 
 
 
 
(52) CORRECTIONS TO REFRACTION FOR REVISED READINGS OF 
 
 CORRECTIONS TO REFRACTION OF STARS, &c. continued. 
 
 Date. 
 
 Star'3 Name. 
 
 R.A. 
 
 iSSo-o. 
 
 Thermometer. 
 
 Refraction. 
 
 Correct on 
 to 
 Refraction. 
 
 Used. 
 
 Corrected. 
 
 1 88 1 June 25 
 1881 Sept. 14 
 1883 Aug. 25 
 1883 Sept. 19 
 
 1880 Dec. 30 
 1885 July 6 
 1885 June 26 
 1882 Aug. 7 
 1882 Aug. 21 
 1884 Aug. 16 
 1884 Aug. 5 
 
 1883 July 17 
 1 88 1 Sept. 14 
 1884 June 27 
 1884 Aug. ii 
 1885. Sept. i 
 1885 Aug. 14 
 
 ? 
 1885 July 24 
 1885 June 26 
 1883 Feb. 23 
 1884 Feb. 1 8 
 
 1882 Aug. 7 
 1882 Aug. 21 
 1883 July 4 
 1 88 1 July 1 8 
 1882 Sept. 20 
 1885 Aug. 15 
 1885 Sept. 22 
 1885 Oct. i 
 1885 Aug. 15 
 1885 Sept. 22 
 1885 Oct. i 
 1883 July 4 
 1 88 1 July 10 
 1882 July 26 
 1879 Jul y 8 
 1882 Aug. 12 
 1883 Sept. 27 
 1884 Mar. 24 
 1882 Sept. 7 
 
 H Ureas Minorifl 
 
 h m s 
 l8.II. 2 
 
 18. 13. 14 
 
 18. 14. 25 
 
 18. 15. 6 
 
 18. 18. 12 
 18. 18. 35 
 18. 20. 34 
 
 18.21. 4 
 18.22. 7 
 18.22. 9 
 
 18.23. 9 
 
 1 8. 24. 24 
 18.25.52 
 
 1 8. 26.48 
 
 18. 28.41 
 18.30.43 
 1 8. 30.49 
 18.31.44 
 
 i8-3 2 -53 
 18.35.32 
 18.35.42 
 
 
 
 53'4 
 60-5 
 627 
 
 69'3 
 
 > 9 
 
 34'3 
 64-9 
 49-0 
 
 57-1 
 
 57'4 
 65-4 
 
 59'4 
 
 9 9 
 
 547 
 60-5 
 56-9 
 74-6 
 
 53 - i 
 56-1 
 
 > ? 
 6o'9 
 49-0 
 41-7 
 33'9 
 
 9 9 
 
 57-1 
 
 57'4 
 53'9 
 687 
 
 537 
 58-8 
 6ro 
 
 53-6 
 58-8 
 6ro 
 53-6 
 
 53'9 
 60-4 
 56-9 
 
 53'9 
 64-4 
 50-8 
 447 
 54'9 
 
 o 
 
 5 I-8 
 58-0 
 60-4 
 6r8 
 
 9 
 
 33'i 
 61-8 
 48-3 
 56-6 
 57-0 
 65-1 
 58-6 
 
 > 9 
 
 54-0 
 
 57'5 
 56-6 
 74-2 
 52-7 
 53'3 
 ? ? 
 60-0 
 48-0 
 40-7 
 3 2 '4 
 
 9 
 
 56-3 
 56-8 
 
 53'4 
 677 
 53-1 
 
 58-4 
 57-8 
 52-4 
 58-4 
 57-8 
 
 5 2 '4 
 53-4 
 59-2 
 
 55'4 
 53' 2 
 62-7 
 56-6 
 4 2 '5 
 53'5 
 
 
 
 4' 
 
 40 
 
 4 
 39 
 
 9 1 
 
 '53 
 40 
 140 
 3' 2 
 307 
 35 
 80 
 
 9 > 
 
 '75 
 33 
 
 2 43 
 232 
 
 244 
 
 72 
 
 9 9 
 
 58 
 
 59 
 163 
 
 160 
 
 9 9 
 
 '59 
 
 157 
 158 
 152 
 
 '55 
 3i 
 130 
 130 
 131 
 130 
 130 
 98 
 184 
 
 58 
 178 
 
 '77 
 13 
 73 
 103 
 
 H 
 
 + 0-13 
 
 + 0'20 
 
 + 0-18 
 + 0-46 
 
 9 9 
 
 + '33 
 -f 0-24 
 
 + 0'20 
 
 + o'3 2 
 + 0-24 
 + 0-18 
 + 0-13 
 
 > > 
 
 + 0-24 
 + 0-19 
 + 0-15 
 + 0-18 
 -f 0-19 
 + 0-41 
 ? ? 
 
 + O'JO 
 + 0-12 
 
 + '34 
 + 0-51 
 
 J J 
 
 + 0-26 
 + 0-19 
 + 0-16 
 + 0-30 
 + 0-19 
 
 + 0'I2 
 + 0-84 
 + 0-32 
 -f- O'I2 
 + 0-84 
 + 0-32 
 + O'lO 
 
 + '44 
 + 0-18 
 + 0-26 
 + o'6o 
 - 0-15 
 + 0-33 
 + 0-29 
 
 
 
 R. 
 
 D. 
 
 $ Ursaa Minoris 8.P 
 
 Bradley 2296 ..* * 
 
 La.la.nde 33738 
 
 
 
 i) Serpentis R, 
 
 ...D. 
 
 2 1 Sagittarii 
 
 
 A Sagittarii 
 
 
 
 d Serpentis R. 
 
 ...D. 
 
 Lalande 34128 
 
 
 b Draconis S P 
 
 ...R 
 
 D 
 
 Piazzi XVIII 82 
 
 
 
 Piazzi XVIII 92 
 
 
 
 
 
 
 
 
 i Aquilse 
 
 Bradley 2332 
 
 
 Bradley 2335 
 
 
 
 
 2 AouilcC 
 
 
 $ Ursse Minoris (1883 September 19). It is assumed that an error of o in 'i was made in the reading of the 
 barometer. 
 $ Ursa; Minoris S.P. (1880 Dec. 30.) The reading of the barometer (39 in '65) has also been supplied from the 
 meteorological register, the reading previously used being 29' '54. 
 
THE EXTKUIOK TllKKMOMKTKU, IN THE YKABS 1877 TO 1886. (55) 
 
 CORRECTIONS TO REFRACTION OF STARS, &c.,;tti,in,;l. 
 
 Date. 
 
 Star's Name. 
 
 R.A. 
 
 1880-0. 
 
 Thermorteter. 
 
 Kefraction. 
 
 Correction 
 to 
 Refraction. 
 
 Used. 
 
 Correortxl. 
 
 1883 July 17 
 1884 July 9 
 
 1885 Sept. l 
 
 > 
 1885 Sept. 22 
 1885 Oct. i 
 1877 Ma y * 8 
 1879 Aug. 1 8 
 1884 Aug. 6 
 1879 June 6 
 1884 June 27 
 1877 May 28 
 1883 Aug. 3 
 1883 Aug, 3 
 1883 Sept. 19 
 
 n 
 
 1884 Oct. 24 
 1880 Sept. 3 
 1879 July 8 
 1884 Sept. 25 
 1884 Sept. 2; 
 1885 July 8 
 1881 July 12 
 1880 Sept. 3 
 1882 Oct. 2 
 
 ?> 
 1879 Aug. 1 8 
 1883 Aug. 16 
 
 ?i 
 1885 Aug. 8 
 1884 July i 
 1880 Sept. 3 
 1883 Aug. 21 
 1883 Aug. 16 
 
 n 
 
 1883 Aug. 21 
 1883 Aug. 28 
 1885 Aug. 24 
 
 1879 July 8 
 
 1 88 1 July 12 
 1885 June 2 
 1884 Feb. 21 
 
 2 Aquilse R 
 
 h in * 
 18.35.42 
 
 18. 38. 10 
 
 18.40.48 
 
 18.41. 5 
 1 8. 46. 50 
 18.47.49 
 18.48. 36 
 18.48.49 
 1 8. 50. 9 
 
 18.50.34 
 18.55. 7 
 18.57.30 
 18. 58. 36 
 18.58.37 
 18.58.49 
 18.59.27 
 18.59.45 
 18.59.53 
 
 18.59.54 
 
 18.59.58 
 19. 8. II 
 19. 8. 15 
 19. 9.46 
 19. 9.52 
 
 19. 10.35 
 19. 10.37 
 
 19. 12. II 
 
 19. 14. 8 
 
 19. 14. 20 
 
 o 
 
 547 
 
 
 
 62-7 
 > 
 53'i 
 > 
 6ro 
 53-6 
 
 47'9 
 58-0 
 62-8 
 54-0 
 56-9 
 
 47'9 
 59-6 
 59-6 
 6n 
 
 5 > 
 
 48-9 
 66-6 
 
 53'9 
 55'9 
 55'9 
 57-6 
 
 63-3 
 66-6 
 56-4 
 
 > > 
 58-0 
 55-6 
 
 > 
 
 59'9 
 58-9 
 66-6 
 67-1 
 55-6 
 
 > 
 67-1 
 64-0 
 56-8 
 
 53'9 
 63-3 
 507 
 43-2 
 
 
 
 537 
 i > 
 61-4 
 
 ) * 
 
 52-1 
 
 ) 
 
 57'3 
 52-0 
 
 47-3 
 57'4 
 6r8 
 53-0 
 
 55'9 
 47'i 
 58-5 
 58-5 
 60-0 
 
 48-0 
 66-3 
 
 53'o 
 55-0 
 
 55'o 
 56-6 
 62-4 
 66-0 
 55-8 
 
 ) 
 
 567 
 
 54'* 
 
 > ) 
 59'3 
 58-0 
 65-4 
 657 
 53'5 
 > 
 657 
 63-0 
 56-0 
 
 5 2 '5 
 61-8 
 52-8 
 44-0 
 
 it 
 IO2 
 
 99 
 
 > 
 
 102 
 
 f j 
 101 
 IOI 
 
 273 
 271 
 
 85 
 89 
 185 
 258 
 141 
 
 141 
 
 76 
 
 ? ) 
 
 184 
 
 230 
 187 
 84 
 84 
 136 
 
 290 
 196 
 
 87 
 
 > > 
 
 44 
 45 
 
 39 
 241 
 219 
 42 
 43 
 
 42 
 60 
 l6l 
 48 
 4 8 
 90 
 219 
 
 
 
 + 0'2I 
 
 
 + 0-26 
 
 9 ) 
 + O'2I 
 
 > 
 
 + 075 
 
 + '33 
 + '33 
 + 0-31 
 + 0-17 
 + 0-18 
 
 + 0-38 
 + 0-37 
 + 0-32 
 + 0-32 
 + 0-17 
 
 9 
 + 0-33 
 + OM4 
 
 + '34 
 + 0-15 
 + 0-16 
 + 0-28 
 + 0-52 
 + 0-24 
 
 + OMO 
 
 1 
 + O'll 
 
 + 0-13 
 
 J 
 
 + 0-17 
 + 0-43 
 + 0'53 
 
 + O'I2 
 
 + 0-18 
 
 
 + 0-12 
 + 0'12 
 + 0-27 
 + OM3 
 + OM4 
 - 0'39 
 O'36 
 
 ...D 
 
 B 
 
 ...D 
 
 K 
 
 D 
 
 
 
 ^ Sagi ttari i 
 
 
 6 AquiJse 
 
 R Scuti 
 
 n Saffittarii . 
 
 o- Sagittarii 
 
 Oeltz. Arg. (8.) 18841-2 
 
 Oeltz. Arg. (S.) 18847 
 
 Lalande 35281 R. 
 
 D. 
 
 ' Sagittari i 
 
 Piazzi XVIII 261 
 
 o Sagittarii 
 
 Bradley 2398 
 
 h Aquilas 
 
 B. D. 15 No. 5223 
 
 T Sagittarii 
 
 Piazzi XVIII. 294 
 
 \ Aqailse R 
 
 ..D 
 
 Aquilse 
 
 ...R 
 
 ...D 
 
 Lalande 35693 
 
 \l/ Sagittarii 
 
 Piazzi XIX. 22 
 
 W. B. XIX. 197 
 
 W. B. XIX. 200 R 
 
 ...D. 
 
 
 22 Aquilaa 
 
 '/ S;uyitt'trii 
 
 <o Aquilae 
 
 
 f Aquilae 
 
 K Cygni S.P 
 
 
 
(54} 
 
 CORRECTIONS TO REFRACTION KOR REVISED READINGS OF 
 CORRECTIONS TO REFRACTION OF STARS, Sx. continued. 
 
 Date. 
 
 Star's Name. 
 
 R.A. 
 
 1880-0. 
 
 Thermometer. 
 
 Refraction. 
 
 Correction 
 to 
 Refraction. 
 
 Used. 
 
 Corrected. 
 
 1885 Aug. 24 
 1884 July 17 
 1884 Aug. 6 
 
 1878 Sept. 3 
 1879 Mar. 13 
 1883 Jan. 18 
 1878 Oct. 8 
 1879 July 8 
 1883 Aug. 21 
 1885 Sept. 28 
 1883 Aug. 21 
 1 88 1 July 12 
 1882 Sept. 23 
 1884 July 5 
 
 9> 
 
 1885 July 22 
 
 
 1885 Aug. 24 
 1878 June 26 
 1883 Aug. 22 
 1 88 1 July 12 
 1877 Sept. 5 
 
 1 88 1 Sept. 14 
 
 1882 Mar. 17 
 1880 Sept. 3 
 1882 Sept. 6 
 
 
 1882 Sept. 7 
 
 tl 
 
 1877 July 2 
 1879 July 10 
 
 1883 Feb. 22 
 
 1883 Mar. 3 
 
 ?> 
 1 88 1 Aug. 7 
 1883 Aug. 21 
 
 
 1877 June 27 
 1878 June 26 
 
 ci Aquilae 
 
 h in a 
 19.14.24 
 I 9 . 14.51 
 
 19. 1 6. ii 
 19.17.51 
 
 19. 18. 4 
 19. 18. 14 
 
 19. 18. 59 
 
 19. 19. 21 
 19. ig. 22 
 19. 19.27 
 
 19.21. 6 
 19.22.57 
 19. 24. 23 
 J9- 2 5-53 
 
 19.28.55 
 
 19.29. 4 
 19. 30. 26 
 
 I9-33-5I 
 19-35-37 
 
 19. 39. 22 
 
 19.40.33 
 
 19.44. I0 
 
 
 
 56-8 
 
 577 
 61-2 
 
 > ) 
 60-4 
 
 39'5 
 45-2 
 
 57-8 
 
 53-9 
 67-1 
 
 47'3 
 67-1 
 
 63-3 
 
 S4'3 
 
 59-1 
 
 ) 5 
 
 55'3 
 
 ) 
 
 56-8 
 66-7 
 637 
 
 63-3 
 56-3 
 
 J > 
 
 57'5 
 
 > 
 
 53'3 
 66-6 
 
 55'5 
 
 
 
 ' 53-2 
 
 > 
 
 57-0 
 54' i 
 
 9 9 
 
 45-2 
 
 > 
 
 sr 
 
 ; 1 
 
 58-3 
 67-1 
 
 i 
 58-0 
 66-7 
 
 
 
 55-6 
 
 55'9 
 60-3 
 
 
 58-8 
 
 38-9 
 44-8 
 57-2 
 
 5^5 
 65-5 
 46-4 
 65-5 
 61-8 
 52-9 
 58-1 
 
 5 J 
 
 53-2 
 
 J 
 
 55'3 
 65-0 
 63-0 
 61-3 
 Si'5 
 
 ? f 
 
 55-0 
 
 > 
 52-6 
 64-6 
 54-6 
 
 > 
 
 52'5 
 
 > 
 54' 3 
 50-0 
 
 ? 
 44'4 
 
 
 
 36-3 
 
 > 
 
 57-1 
 65-3 
 
 ? 1 
 
 56-8 
 64-4 
 
 a 
 
 75 
 138 
 137 
 
 ) > 
 
 73 
 87 
 171 
 214 
 217 
 39 
 '35 
 
 39 
 64 
 
 65 
 65 
 
 > > 
 
 66 
 
 ) 
 
 65 
 153 
 6 7 
 80 
 25 
 
 ) ? 
 
 3 
 
 ? 
 
 68 
 
 27 
 95 
 
 
 
 96 
 
 ) ) 
 140 
 21 
 
 ? ? 
 
 93 
 
 T 
 
 94 
 i 
 169 
 
 49 
 
 1 > 
 
 44 
 43 
 
 I 
 
 + 0-18 
 + 0-51 
 + 0-24 
 
 ) > 
 + 0-23 
 
 + 0'12 
 + 0-13 
 + 0-26 
 + O-62 
 + 0-13 
 + 0-25 
 
 + 'i3 
 
 + 0-20 
 
 + 0-18 
 + 0-13 
 
 + 0-28 
 i ? 
 
 + 0'20 
 
 + '53 
 + 0-10 
 
 + 0-32 
 + 0-24 
 
 ) > 
 
 + 0-16 
 
 ) ? 
 + O'lO 
 + O'l I 
 
 + 0-17 
 
 1 
 
 + 0-14 
 
 '? > 
 
 + 077 
 + 0-17 
 
 ) 1 
 
 + 0-15 
 
 > ) 
 
 + 0-15 
 
 > 
 
 + 0-40 
 + 0-18 
 ? < 
 
 + O'll 
 + O'2O 
 
 v Sa^ittarii 
 
 
 D 
 
 W B XIX 357 
 
 T Draconis S P 
 
 Groombrid r e 2827 S P 
 
 Y 3 S<u?ittarii 
 
 
 2 Sagittae 
 
 Piazzi XIX. 107 
 
 3 Sagittas 
 
 S Aquilae 
 
 
 R 
 
 D 
 
 R 
 
 D 
 
 
 Lalande 36688 
 
 c Aquilse 
 
 e Aquilse 
 
 & Cveni . ...R 
 
 ...D 
 
 Groombridge 2900 R 
 
 ...D 
 
 Groombridge 2900 S P 
 
 W B (2) XIX. 852 
 
 K Aquilae R 
 
 ...D 
 
 
 D 
 
 * Sagittftrii ... 
 
 Groombridge 2917 R 
 
 ...D 
 
 Groombridge 2917 S.P R 
 
 ...D 
 
 ...R 
 
 D 
 
 f Sagittarii 
 
 y Aquilse R. 
 
 D 
 
 A. Urs&e Minoris 
 
 
 
 
THE ExTEIUOli TllEUMOMETEK, IN THE YEARS 1877 TO 1886. (55) 
 
 CORRECTIONS TO REFRACTION OF STARS, &c. continued. 
 
 I'ate. 
 
 Star's Name. 
 
 R.A. 
 
 1 880-0. 
 
 Thermometer. 
 
 U -f ract'on. 
 
 Correction 
 to 
 Refraction. 
 
 ILsed. 
 
 Corrected. 
 
 1880 Sept. 3 
 
 * 
 1 88 1 July 20 
 1 88 1 A.Ug. 7 
 1 88 1 Sept, 4 
 1881 Sept. 26 
 1 88 1 Oct. 31 
 1882 Sept. 23 
 1883 Sept. 5 
 1884 June 25 
 1884 Sept. 5 
 1885 Sept. 22 
 1880 Mar. 13 
 
 * 
 1882 Jan. 24 
 1882 April 4 
 1884 Mar. 29 
 1885 Jan. 6 
 1879 Sept. 25 
 1883 Aug. 21 
 
 1882 Sept. 23 
 1885 Sept. 4 
 1879 Sept. 25 
 1883 Aug. 28 
 1880 July 15 
 1883 July 17 
 1883 Oct. 6 
 
 1884 Feb. 25 
 
 11 
 1877 June 27 
 1883 Feb. 15 
 1882 Mar. 27 
 1883 July 19 
 1884 Aug. 25 
 1 88 1 July ii 
 1882 Sept. 23 
 1882 Jan. 6 
 
 1883 All'.'. 21 
 
 1882 July 29 
 1883 Aug. 21 
 1883 Feb. 15 
 1883 Aug. 21 
 
 \ Ursss Minority R 
 
 ll 111 S 
 
 19.44. 10 
 
 19.44.56 
 
 19. 50. 6 
 19. 53. 16 
 
 I9-55-I7 
 19. 58. 46 
 20. 5. 7 
 
 20. 9. 37 
 20. 10. 58 
 
 20. 11.47 
 
 20. 12. 54 
 
 20. 14. O 
 
 20. 14. 1 6 
 20. 19. 29 
 
 20. 22. 9 
 ZO. 22. 10 
 2O. 24. 21 
 2O. 24. 42 
 
 20. 28. 3 
 
 
 
 66-6 
 
 ? > 
 
 59'5 
 58-3 
 547 
 56-9 
 
 33'6 
 54'3 
 527 
 56-1 
 54-8 
 56-9 
 44-8 
 
 ) 
 
 37-9 
 46-5 
 
 4''3 
 33-8 
 5'7 
 67-1 
 
 J 
 
 54'3 
 56-2 
 
 5'7 
 62-7 
 
 59'3 
 537 
 50-6 
 
 % i 
 4.1-1 
 
 
 58-0 
 40-8 
 
 477 
 51-8 
 54-8 
 6ro 
 50-5 
 41-1 
 64-8 
 58-3 
 64-8 
 40-8 
 64-8 
 
 o 
 64-0 
 
 > > 
 58-4 
 
 57'i 
 
 53'3 
 55' 
 35'3 
 50-5 
 
 SI'S 
 54-9 
 53'2 
 55-3 
 43-8 
 > 
 32-4 
 45'5 
 40-1 
 32-8 
 50-2 
 65-2 
 
 
 
 50-5 
 55-6 
 49-8 
 62-3 
 
 57'9 
 52-9 
 49-6 
 
 > 
 
 40-4 
 
 ) ) 
 
 56-0 
 40-2 
 46-1 
 50-9 
 
 54'4 
 60-2 
 50-0 
 40-5 
 64-, 
 57-8 
 64-2 
 40-0 
 64-0 
 
 a 
 
 43 
 
 1 > 
 
 44 
 44 
 44 
 44 
 46 
 
 44 
 44 
 
 44 
 44 
 44 
 49 
 > > 
 
 5 
 48 
 
 49 
 
 5 
 54 
 52 
 
 J 
 
 '4 
 105 
 
 33 
 118 
 
 75 
 75 
 77 
 
 1 
 
 136 
 
 
 
 194 
 "4 
 73 
 
 120 
 121 
 131 
 
 '33 
 
 I2 5 
 
 '49 
 
 '54 
 132 
 
 105 
 128 
 
 H 
 
 + O'22 
 
 
 + o-io 
 
 + O'lO 
 + O'I2 
 + OM7 
 0-26 
 + 0-34 
 + O'l I 
 + O'l I 
 
 + 0-14 
 + 0-15 
 
 + O'lO 
 1 J 
 
 + '53 
 
 + O'lO 
 + O'l 2 
 + O'l I 
 + 0-26 
 
 + 0'2O 
 
 j 
 + O'l I 
 
 + 0-13 
 
 + ''4 6 
 
 + O'lO 
 + 0'2I 
 + O'I2 
 + 0-15 
 
 J 
 
 4- 0'20 
 J J 
 
 + 078 
 + 0-14 
 f 0-24 
 
 + O'22 
 + 0'10 
 + 0'2I 
 + 0-13 
 + O'l6 
 
 + 0-18 
 + 0-14 
 + 0-15 
 + 0-17 
 
 + 0'20 
 
 D 
 
 
 
 
 
 
 
 
 
 
 
 X Ursfe Minoris S P R 
 
 ...D 
 
 
 
 
 
 a Aquilae 
 
 ...R. 
 
 D 
 
 W B (2) XIX 1617 
 
 W B XIX 1300 
 
 
 
 
 
 R. 
 
 D 
 
 68 Draconis S P R 
 
 .. 1) 
 
 
 Oeltz Arg (N.) 20313 SP 
 
 K Cephei S.P 
 
 v Capricorn! 
 
 
 8 Capricorn! . ... 
 
 
 B D +63No 1618 S P 
 
 
 
 B. A. C. 7063 
 
 B. D. + 67No. 1248 S I 1 
 
 \V. li. XX. 664 
 
 
 \ Urs:c Miuoris (i8Si October 31). The barometer and thermometer were read l.y the observer, but the readings 
 had been accidentally omitted from the computation sheets. The barometer reading was 29'" -97, that 
 previously used being 30'" -ot. 
 a Aquilae aud'r Sagittarii (1879 Sept. 25). The reading of the barometer (3c'"-i5) has also been supplied from 
 the meteorological register, the reading previously used being 3O'"'i4. 
 
(56) CORRECTIONS TO REFRACTION FOR REVISED READINGS OF 
 
 CORRECTIONS TO REFRACTION OF STARS, &c. continued. 
 
 Date. 
 
 Star's Name. 
 
 R.A. 
 
 18800. 
 
 Thermometer. 
 
 Refraction. 
 
 Correction 
 to 
 Refraction. 
 
 Used. 
 
 Corrected. 
 
 1882 July 29 
 1882 Sept. 23 
 1879 July 2 4 
 1881 July ii 
 1 88 1 July 12 
 1882 July 29 
 1881 July 12 
 1881 July 12 
 1879 Aug. '8 
 1884 Feb. 29 
 
 1883 Nov. 19 
 1884 Aug. 15 
 1884 Sept. 14 
 
 
 1877 Oct. 16 
 1879 Sept. 25 
 1880 May 14 
 1884 April 5 
 1885 April 17 
 1884 Sept. 14 
 
 >j 
 1877 Mar. 14 
 1883 Aug. 25 
 1881 July 12 
 1883 July 20 
 1883 Nov. 13 
 1880 June 25 
 1883 Nov. 26 
 
 
 1883 Aug. 29 
 
 1884 Sept. 14 
 
 ?? 
 1884 April 10 
 1885 Sept. 20 
 1883 Aug. 25 
 1884 April 10 
 1882 Mar. 1 8 
 1884 Sept. 4 
 1879 Sept. 26 
 1882 Mar. 4 
 1 88 1 Sept. 9 
 1882 Feb. 8 
 
 Piazzi XX. 194 
 
 h m B 
 
 20. 28. 45 
 
 2O. 30. 29 
 
 20. 32. 34 
 20. 34. 4 
 
 20. 39. 12 
 2O. 46. I I 
 2O. 51.11 
 
 20. 54. 38 
 2O. 59. 12 
 21. 7.52 
 
 21. 15.34 
 
 21- '5-43 
 
 21. 16.57 
 21.21. I 
 21.24.31 
 
 21.27. 6 
 21. 29. 2 
 21. 31. 22 
 
 21. 31.24 
 21.35. I 
 
 21. 38. 18 
 21.39. '3 
 
 21.45. 14 
 21.47. n 
 21.47.54 
 21.50.51 
 21. 53. 16 
 
 21.56.58 
 
 21.59.57 
 
 22. O. 17 
 22. 4. 8 
 22. 6. 42 
 
 o 
 
 58-3 
 50-5 
 56-0 
 
 6ro 
 
 59'9 
 58-3 
 
 59'9 
 59'9 
 
 55'3 
 33'5 
 
 J ) 
 
 44-0 
 60-3 
 59'4 
 
 > ) 
 
 43' 
 49-1 
 62-8 
 
 47'i 
 50-5 
 59'4 
 
 ? > 
 
 49'5 
 
 577 
 58-3 
 527 
 
 4'7 
 537 
 44-8 
 
 ) ) 
 
 59'4 
 
 5 
 
 59'4 
 
 5 ? 
 
 43'8 
 55'5 
 577 
 43'8 
 48-5 
 52-2 
 51-9 
 39'9 
 5i-4 
 33-1 
 
 
 
 57-8 
 497 
 55'i 
 60-2 
 
 58-6 
 
 57-8 
 58-6 
 58-6 
 547 
 3*'4 
 
 5 
 
 43'2 
 59-5 
 567 
 
 J 1 
 
 42-5 
 48-6 
 67-8 
 46-0 
 
 49'8 
 56-2 
 
 ) J 
 
 48-3 
 567 
 57-0 
 52-1 
 41*0 
 52-8 
 44'3 
 
 5 ) 
 58-0 
 
 ) J 
 
 56-4 
 
 
 
 43'2 
 55-0 
 56-7 
 42-9 
 47-6 
 
 5i'3 
 
 51-0 
 
 39'4 
 50-8 
 31-9 
 
 144 
 
 H5 
 80 
 132 
 
 133 
 133 
 
 42 
 189 
 102 
 63 
 
 5 ) 
 
 287 
 149 
 28 
 
 > ? 
 
 I)' 
 150 
 129 
 87 
 89 
 3 
 5 
 94 
 85 
 
 99 
 98 
 
 77 
 128 
 128 
 
 J ? 
 
 5> 
 
 > 
 
 28 
 
 1 ) 
 
 119 
 
 109 
 86 
 
 '83 
 128 
 
 93 
 130 
 
 131 
 
 I 12 
 
 '74 
 
 o 
 
 + - '3 
 + 0-25 
 + 0-15 
 
 + O'22 
 
 + '34 
 + 0-13 
 
 + O'll 
 
 + '49 
 + 0-13 
 + 0-15 
 ? > 
 + 0-47 
 + 0-23 
 + 0-15 
 
 ? 5 
 
 + 0-16 
 + 0-16 
 1-28 
 
 + 0'20 
 + 0-13 
 + 0'20 
 , 
 
 + 0-24 
 
 + 0-17 
 
 + '23 
 + 0'12 
 + 0'12 
 + 0-23 
 + 0-14 
 
 j ) 
 + 0-15 
 
 > 
 + 0-17 
 
 ? > 
 + 0-15 
 + O'll 
 
 + 0-17 
 
 + 0-34 
 + 0-33 
 + 0-17 
 + 0-23 
 + 0-14 
 + 0-14 
 
 + 0'44 
 
 
 70 Aquilfe 
 
 T~ Capricorni 
 
 
 
 a Delpliini 
 
 17 Capricorn! 
 
 p. Aquarii 
 
 76 Draconis S.P R. 
 
 D 
 
 Piazzi XX 411 
 
 
 77 Draconis R 
 
 ,..D 
 
 i Capricorn! 
 
 
 o Cephei S.P 
 
 Oeltz Arg (N ) 22 1 3 1 S P . ... 
 
 Oeltz Arg (N ) 22261 S P 
 
 2 Pegasi R 
 
 , D 
 
 (f Cephei SP 
 
 Piazzi XXI. 190 
 
 Aquarii 
 
 
 B. F. 204 1 . 
 
 42 Capricorn! 
 
 
 ...D 
 
 
 ...D 
 
 K Pegasi R. 
 
 D 
 
 Groombridge 3588 S.P 
 
 B F 2988 
 
 Piazzi XXI 320 
 
 /x Cephei S P 
 
 Piazzi XXI 360 S P 
 
 30 Aquarii 
 
 t Aquarii 
 
 18 Cephei S P 
 
 
 Cephei S P 
 
 
 Piazzi XXI. 190, Piazzi XXI. 320. The correction for indez error of the thermometer had been erroneously applied. 
 
THE EXTKKIOK TllKHMOMKTKli, IN TDK YlOAKS 1877 TO 1886. (57) 
 
 CORRECTIONS TO REFRACTION OF STARS, &c. continued. 
 
 Date. 
 
 Star's Name. 
 
 R.A. 
 1 880-0. 
 
 Thermometer. 
 
 Refraction. 
 
 Correction 
 to 
 Infraction. 
 
 Used. 
 
 Corrected 
 
 1880 Jan. 26 
 1879 Sept. 26 
 1880 June 25 
 1884 Sept. 4 
 1881 Sept. 14 
 1882 Mar. 14 
 1883 Aug. 19 
 1884 Sept. 10 
 1 88 1 Feb. 28 
 1882 Mar. 4 
 1 88 1 Feb. 28 
 1882 Mar. 4 
 1883 April 9 
 1885 Mar. n 
 1880 April 29 
 1883 Mar. 15 
 1884 Oct. 24 
 1878 April 6 
 1878 April 6 
 1880 April 29 
 1883 April 9 
 1 88 1 Sept. 14 
 1883 Aug. 19 
 1885 Oct. i 
 1883 April 4 
 1880 Sept. 24 
 1877 Oct. 1 8 
 1883 Dec. 14 
 1877 Sept. 6 
 1877 Oct. 27 
 1877 Dec. 10 
 
 1882 Mar. 2 
 1877 Oct. 15 
 1877 Oct. 27 
 1877 Sept. 6 
 1877 Oct. 15 
 1877 Sept. 6 
 1877 Oct. 27 
 1882 Mar. 13 
 1879 Nov. 13 
 1877 Oct. 15 
 1879 Sept. i 
 1877 Oct. 27 
 1883 Sept. 15 
 
 Hradli'V 2934 S P ... 
 
 U m i 
 22. 7.54 
 22. IO. 30 
 
 22. 10. ;i 
 
 22. 14. l8 
 22. I7. 5 2 
 
 22. ig. II 
 
 22. l8. 12 
 
 22. 22. 38 
 
 22.22.54 
 
 22. 24. I 8 
 22.24.42 
 22.24.43 
 
 22. 24. 44 
 
 22. 28. 48 
 22. 29. II 
 22.31.32 
 
 22.33- 3 
 
 22. 34. 24 
 22.44. 13 
 22. 46. 21 
 
 22. 47. IO 
 
 22.47.47 
 
 22.47. 54 
 
 22.51.49 
 22.53.16 
 
 22. 58. 12 
 
 22-59-37 . 
 23. 0.41 
 
 23. 4. 5 
 23. 8. 6 
 
 23- 9- 5 
 23. 10.57 
 23. 11.24 
 
 
 
 23-4 
 51-9 
 
 55-9 
 52-2 
 
 53-3 
 
 45-8 
 
 53'4 
 537 
 30-6 
 
 39-9 
 30-6 
 
 39'9 
 43'9 
 35-8 
 43-0 
 28-8 
 44-0 
 42-5 
 
 4 2 '5 
 43-0 
 
 43'9 
 53'3 
 53'4 
 48-9 
 
 51-1 
 58-9 
 38-0 
 47-1 
 51-1 
 51-0 
 38-1 
 
 > ) 
 
 38-3 
 46-4 
 51-0 
 
 s r 
 
 46-4 
 
 5 i-i 
 51-0 
 
 43' 
 39'3 
 46-4 
 
 48-3 
 51-0 
 
 53'5 
 
 2 ,-6 
 
 51-0 
 52-7 
 51-0 
 52-3 
 
 44' 5 
 5 2 7 
 5 2 7 
 2 9'3 
 39-0 
 29-3 
 
 39' 
 43'i 
 
 34'i. 
 
 42-0 
 28-3 
 
 43'4 
 41-2 
 41-2 
 
 42-0 
 42-7 
 51-6 
 
 5 2 7 
 48-1 
 50-6 
 57-0 
 36-8 
 46-6 
 50-3 
 49-6 
 35-6 
 
 > 
 
 37'5 
 45-8 
 49-6 
 50-2 
 45-6 
 49-8 
 49-6 
 40-9 
 38-5 
 45-5 
 46-9 
 
 497 
 53-0 
 
 
 95 
 
 100 
 
 98 
 
 97 
 90 
 
 '34 
 89 
 
 89 
 "4 
 
 I 12 
 114 
 1 12 
 113 
 
 55 
 
 97 
 '3 
 167 
 167 
 96 
 7' 
 75 
 87 
 327 
 127 
 3 
 
 IO2 
 
 98 
 IIO 
 
 118 
 
 35 
 
 J ) 
 
 60 
 "5 
 H3 
 123 
 
 120 
 IIO 
 121 
 82 
 9 6 
 
 "'7 
 68 
 116 
 117 
 
 + 0*37 
 + O'l8 
 + 0-64 
 + 0-24 
 + 0-19 
 + 0-36 
 
 + O'I2 
 
 + 0-18 
 + 0-32 
 
 + 0'2I 
 
 + '3 2 
 
 + 0'2I 
 + OM9 
 + O'2I 
 + O - 2O 
 + O'l I 
 + 0-14 
 
 + '45 
 + 0-45 
 
 + 0'2O 
 
 + 0-18 
 
 + 0-26 
 
 + O'I2 
 
 + 0'55 
 + 0-13 
 + O'l I 
 
 + 0-26 
 
 + O'lO 
 
 + 0-19 
 
 + '34 
 + 0-19 
 
 j 
 4- o'io 
 + 0-15 
 
 + o'33 
 + 0-23 
 
 + 0'20 
 + 0-30 
 + 0'35 
 
 + 0-37 
 + 0-16 
 
 + O'22 
 + OM9 
 + 0'3I 
 4- O'I2 
 
 6 Aquarii 
 
 
 
 
 25 Cephei S P 
 
 ,i Aquarii 
 
 
 Groombridge 37608.? 
 
 
 Radcliffe 5671 S.P 
 
 
 
 Bradley 2993 S.P 
 
 Lalande (F.) 4151 S.P 
 
 
 a Aquarii 
 
 Bradley 2972 S P 
 
 S Cephei S.P 
 
 Lalande (F.) 4162 S.P 
 
 P Cephei S.P 
 
 r) Aquarii 
 
 K Aquarii 
 
 Lacaille 9204 
 
 30 Cephei S.P 
 
 w Pei'asi . 
 
 A Aquarii 
 
 
 74. Aciuarii . 
 
 75 Aquarii 
 
 Bradley 3038 R 
 
 D 
 
 Bradley 3038 S.P 
 
 W. B. XXII. 1047 
 
 
 Piazzi XXII. 264 
 
 w. i;. xxn. 1204 
 
 W 15. XXII. 1232 
 
 \V. B. XXII. 1249 
 
 T Cephei S P 
 
 * Aquarii 
 
 Lalande 45504 
 
 y Piscium 
 
 \V. B. XXIII. 185 
 
 
 
 51 Aquarii (1883 August 19). The correction for index error of the thermimcter had been erroneously applied. 
 K Aq-oarii. The correction for index error of the thermometer had not been applied. 
 
 GKEEXWICH OBSERVATIONS, 1887. 
 
 II 
 
 
(58) 
 
 CORRECTIONS TO REFRACTION FOR REVISED READINGS OF 
 
 CORRECTIONS TO REFRACTION OF STARS, &c. concluded. 
 
 Dfcte. 
 
 Star's Name. 
 
 R.A. 
 
 1880-0. 
 
 Thermometer. 
 
 Refraction. 
 
 Correction 
 to 
 Refraction. 
 
 Used. 
 
 Corrected. 
 
 1877 Oct. 15 
 1884 Mar. 24 
 
 
 1877 Oct. 27 
 1880 Sept. 24 
 1883 April 9 
 1877 Oct. 27 
 1877 Oct. 15 
 1879 Sept. i 
 1877 Oct. 15 
 1884 Mar. 24 
 
 
 1885 April 17 
 
 
 1880 Sept. 24 
 
 1877 Oct. 20 
 1877 Oct. 15 
 1883 Sept, 15 
 1877 Sept. 5 
 1877 Nov. 16 
 1884 April 21 
 1877 Sept. 5 
 1877 Nov. 16 
 
 1885 Sept. 5 
 1883 Sept. 15 
 1877 Nov. 1 6 
 1877 Nov. 1 6 
 1882 Mar. 2 
 1882 April 8 
 1882 April 8 
 1883 May 16 
 
 \jp Acjuarii 
 
 h m B 
 23. 12.43 
 
 23- '3- 4 2 
 
 23. 14.38 
 23. 14.42 
 23. 15. 20 
 23. 16.47 
 23. 17. 4 
 23.20.47 
 23.21.50 
 23.22. 13 
 
 23-23- 5 
 
 23.23. 17 
 23.26. 13 
 
 23-29-15 
 23.29.45 
 23.34. 26 
 23. 34. 56 
 23.36.38 
 
 23.40. 16 
 23.42. 56 
 
 23-43- '9 
 23.46.56 
 23.49. 
 23. 56. 28 
 23. 56. 30 
 23.58.29 
 
 
 
 46-4 
 36-8 
 
 > ) 
 
 51-0 
 58-9 
 
 42-6 
 51-0 
 46-4 
 48-3 
 46-4 
 36-8 
 
 9 
 
 467 
 
 J 
 
 58-9 
 
 > 
 
 47-6 
 46-4 
 
 53'5 
 49-2 
 48-9 
 
 387 
 49-2 
 48-9 
 
 J J 
 
 547 
 53'5 
 48-9 
 48-9 
 37'2 
 +i'J 
 4''5 
 56-3 
 
 
 
 45-5 
 
 35'4 
 
 J 
 
 497 
 57-0 
 41-9 
 497 
 45'4 
 46-9 
 
 45'4 
 35'4 
 
 ) 
 46'2 
 
 ) 
 
 57-0 
 
 ) 
 
 46-5 
 
 45'4 
 52-9 
 
 48-5 
 47-0 
 
 37'4 
 48-0 
 
 46-3 
 
 ? 
 
 537 
 527 
 
 45'i 
 
 44-8 
 
 36-6 
 40-9 
 40-9 
 SS'5 
 
 a 
 
 108 
 1 08 
 
 > > 
 
 I 10 
 
 31 
 139 
 
 112 
 
 107 
 
 73 
 116 
 
 99 
 > > 
 96 
 
 ? ) 
 
 47 
 
 9 J 
 
 80 
 114 
 113 
 
 112 . 
 II 4 
 
 75 
 III 
 
 4 2 
 
 J ) 
 
 64 
 68 
 
 72 
 70 
 82 
 117 
 117 
 108 
 
 a 
 + O'2O 
 
 + '3' 
 
 J ? 
 
 4- 0-29 
 
 + OM2 
 + 0'2I 
 
 + 0-30 
 
 + O'22 
 + 0'2I 
 + 0-24 
 + 0-29 
 
 
 + O'lO 
 
 > ) 
 + 0-18 
 
 > > 
 + 0-18 
 + 0-24 
 + 0-14 
 + 0-17 
 + '44 
 
 + O'2O 
 + 0-29 
 + 0-23 
 
 > j 
 + 0-14 
 + OM I 
 
 + 0-57 
 + 0-59 
 
 4- o - i I 
 + 0-14 
 + 0-14 
 + 0-18 
 
 o Cephei S P R. 
 
 D. 
 
 W B XXIII 265 
 
 T P6UBi 
 
 Bradley 3104 S P 
 
 
 W B XXIII 315 
 
 K Piscium 
 
 W. B. XXIII. 402 
 
 Bradley 3125 S.P R. 
 
 ...D 
 
 
 ...D 
 
 q Pegasi R 
 
 ...D 
 
 1 1 Piscium 
 
 W. B. XXIII. 497 
 
 
 W.B. XXIII. 571 
 
 W B XXIII 583 
 
 y Cephei S.P 
 
 Piazzi XXIII 153 
 
 76 Pegasi R 
 
 ...D 
 
 1 9 Piscium 
 
 W B. XXIII. 853 
 
 2 1 Piscium 
 
 25 Piscium 
 
 Groombridge 4163 S.P 
 
 Bradley 3202 SP 
 
 Oeltz. Arg. (N.) 26322 S.P 
 Groombridge 4220 S P 
 
 
 
 The following is a list of the similar corrections for planetary observations during 
 the same period. 
 
TIIE EXTERIOR THERMOMETER, IN THE YEARS 1877 TO 1886. 
 
 (59) 
 
 CORRECTIONS TO REFRACTION OF SUN, MOON, AND PLANETS FOR REVISED 
 READINGS OF THE EXTERIOR THERMOMETER AND BAROMETER IN THE 
 YEARS 1877 TO 1885. 
 
 Date. 
 
 Planet. 
 
 Thermometer 
 
 Refraction. 
 
 Correction 
 to 
 Refraction. 
 
 Used. 
 
 Corrtotid. 
 
 1880 August II 
 1883 May 25 
 1883 June 5 
 1880 July 15 
 1881 May 11 
 1 88 1 June I 
 1882 May 26 
 1884 May ii 
 1885 June 26 
 1885 July 22 
 1879 September 2 
 1883 April 8 
 1883 May Z2 
 1883 August 13 
 1883 November 23 
 1885 April 17 
 1877 October 15 
 1877 October 18 
 1877 October 27 
 1877 November 16 
 1884 April 22 
 1885 May 23 
 
 1882 August ii 
 1885 April 27 
 1 88 1 May 7 
 1877 October 15 
 1884 August J 
 1877 May 15 
 1885 July 22 
 1879 July 24 
 1883 May 24 
 1883 May 31 
 1884 April 9 
 1883 June 4 
 1883 May 24 
 1882 September 12 
 1884 March 24 
 1884 March 24 
 1885 February 19 
 1885 February 23 
 1877 October 15 
 
 Sun 
 
 69-9 
 66-9 
 65-8 
 69-8 
 40-8 
 
 73'3 
 63-3 
 
 55-1 
 49-0 
 
 57-9 
 62-4 
 
 46-9 
 62-5 
 68-9 
 40-6 
 57-0 
 46-4 
 38-0 
 51-0 
 48-9 
 43-8 
 50-4 
 
 55'9 
 5*'3 
 49'9 
 46-4 
 547 
 5'5 
 55'3 
 59-2 
 
 557 
 53-0 
 
 40-8 
 557 
 557 
 48-8 
 36-8 
 41-8 
 
 377 
 38-6 
 46-4 
 
 73-8 
 
 7i-4 
 69-1 
 69-0 
 4O - o 
 77-1 
 58-3 
 54'5 
 48-5 
 
 57'* 
 647 
 
 44'9 
 65-S 
 7*'3 
 42-9 
 58-0 
 45-8 
 36-5 
 49-6 
 48-0 
 40-8 
 
 49'3 
 54-0 
 50-9 
 
 47'9 
 
 45'4 
 53-0 
 
 47'5 
 53'* 
 58-3 
 
 54'5 
 50-3 
 
 39-6 
 54-0 
 54'5 
 47'5 
 
 35-4 
 40-2 
 32-7 
 43-6 
 45-5 
 
 4" 
 33 
 3' 
 37 
 132 
 40 
 78 
 1 60 
 164 
 
 154 
 103 
 105 
 
 5 
 36 
 
 214 
 54 
 
 I 12 
 113 
 
 103 
 
 9' 
 36 
 
 54 
 
 45 
 38 
 80 
 
 '34 
 
 200 
 
 67 
 in 
 
 2OI 
 2O2 
 197 
 
 49 
 79 
 
 *77 
 
 43 
 61 
 
 34 
 48 
 48 
 99 
 
 l 
 - 0-32 
 
 - 0-34 
 
 0'22 
 + O'22 
 
 + '*3 
 O'30 
 + 079 
 + O-ig 
 + OM7 
 + O'22 
 
 - '45 
 + o'43 
 0-30 
 0-26 
 roz 
 
 O'lO 
 
 + 0-14 
 
 + '35 
 + 0-29 
 + 0-16 
 + 0-23 
 
 + O'I2 
 + 0-17 
 + O'lO 
 
 + 0-32 
 + 0-28 
 + 0-69 
 + 0-41 
 
 + '47 
 + 0-36 
 
 + '49 
 + 1-09 
 
 + 0-12 
 + 0-27 
 + 0-67 
 + O'I2 
 
 + 0-17 
 + O'l I 
 + 0-50 
 O'JO 
 + OM9 
 
 
 
 Moon 
 
 
 
 
 
 
 
 Venus ... . 
 
 
 
 
 
 
 Mara 
 
 
 
 
 
 Ceres n) 
 
 Pallas (2) 
 
 
 Juno Mj 
 
 Vesta (T) 
 
 
 Hebe fiT) 
 
 
 Flora (7) 
 
 
 
 Irene (u) 
 
 
 Amphitrite (5) 
 
 
 Alcmene fc) 
 
 Jupiter 
 
 
 
 Saturn 
 
 
 Sun. 1883 May 25. The reading of the barometer has also been altered from 29'" -84 to 29'" '80. 
 1883 Jane 5. The reading of the barometer has also been altered from 29'" 77 to 29' 76. 
 
 US 
 
(60} CORRECTIONS TO REFRACTION FOR REVISED READINGS OF 
 
 CORRECTIONS TO REFRACTION OF SUN, MOON, AND PLANETS, &c. concluded. 
 
 Date. 
 
 Planet. 
 
 Thermometer. 
 
 Refraction. 
 
 Correction 
 to 
 Refraction. 
 
 Used. 
 
 Corrected. 
 
 1877 October 27 
 1883 February 16 
 1 88 1 March ' i <; 
 1882 March 6 
 1882 March 13 
 1884. March 
 1884 Mai-h 24 
 1884 April 21 
 1880 March i 
 1882 February i 
 1 88 1 July ii 
 1882 May 12 
 
 Saturn 
 
 51-0 
 44-0 
 38-5 
 39-4 
 43-1 
 
 37-8 
 36-8 
 
 387 
 42-3 
 
 3'7 
 6ro 
 
 49'3 
 
 49-6 
 417 
 367 
 36-6 
 40-9 
 36-5 
 
 35'4 
 37-1 
 
 377 
 30-6 
 6o - 2 
 
 47'9 
 
 98 
 43 
 57 
 61 
 60 
 69 
 69 
 67 
 5' 
 47 
 62 
 81 
 
 + 0-29 
 
 '+ 0'2I 
 + 0'2I 
 + 0-36 
 + 0-28 
 + O-ig 
 + O'2O 
 + 0-23 
 
 + '49 
 + O'll 
 + OTO 
 
 + 0-24 
 
 
 Uranus 
 
 
 
 
 
 
 
 Neptune 
 
 Comet b, iS3i S P 
 
 a. 1882 .. 
 
 
 For the year 1886, the necessity of revising the thermometer and barometer 
 readings was noticed in time to correct the Star Ledgers and Planetary Ledgers and 
 other results ; but not before the Daily Observations were printed. In the Volume 
 for 1886, therefore, the following Corrections are required in the section of Zenith 
 Distances observed with the Transit Circle to make it consistent with the later sections. 
 
 CORRECTIONS TO REFRACTION OF SUN, MOON, PLANETS, AND STARS FOR 
 REVISED READINGS OF THE EXTERIOR THERMOMETER AND BAROMETER, 
 IN THE YEAR 1886. 
 
 Date, 1886. 
 
 Star's Name. 
 
 E.A. 
 
 i88o'0. 
 
 Thermometer. 
 
 Refraction. 
 
 Correction 
 to 
 Refraction. 
 
 Used. 
 
 Corrected. 
 
 Jan. 2 
 
 Jan. 14 
 Jan. 1 6 
 March 4 
 
 46 Tauri R &D 
 
 ll 111 ti 
 
 4- 7- 5 
 4- 13- V 
 
 1 6. 21. 2 
 
 16. 28. 13 
 4- 4'- 4 1 
 
 17. 8. 26 
 
 4- 2 9 
 
 5- 25- 53 
 5- 42- 4 
 5- 48. 4 1 
 
 45'3 
 45'3 
 45'3 
 45-3 
 45'3 
 
 34-6 
 36-9 
 
 33'5 
 33'5 
 33'5 
 
 44'5 
 44' 5 
 44 - 3 
 44-1 
 44-1 
 
 33'5 
 38-9 
 
 32-6 
 32-1 
 32-1 
 
 
 57 
 60 
 76 
 99 
 54 
 
 i'5 
 
 42 
 
 76 
 108 
 58 
 
 + 0-09 
 
 + O'lO 
 
 + 0-16 
 + 0-2; 
 + 0-13 
 
 + 0-27 
 
 - '37 
 
 + 0-14 
 + 0-31 
 + 0-17 
 
 W. B. IV. 248 R & D 
 
 ijUrsse MinorisS.P R. & D. 
 A Draconis S.P R &D 
 
 W. B. IV. 863 
 
 4 Draconis S.P R. & D. 
 
 D S. L 
 
 S Orionis 
 
 K Orionis 
 
 a Orionis 
 
 
 Jan. 16. D S. L. For this observation the reading of the barometer lias also been altered from 29 in '52 to 29 in '39. 
 
THK EXTKIUOK TlIKKMoMKTKK, IN THE YEARS 1877 TO 1886. (61) 
 
 CORRECTIONS TO REFRACTION OF SUN, MOON, PLANETS, &c.f<mtimted. 
 
 Date, 1886. 
 
 Star's Name. 
 
 R.A. 
 
 1880-0.' 
 
 Thermometer. 
 
 Refraction. 
 
 Correction 
 to 
 Refraction. 
 
 Used. 
 
 Corrected 
 
 April 1 2 
 April 27 
 April 30 
 
 May i 
 May 13 
 
 May 1 8 
 
 May 28 
 May 19 
 
 June 4 
 
 June 25 
 
 28 Cephei S.I' 
 
 h >n s 
 22. 25. 48 
 
 10. 31. 38 
 
 o. 28. 49 
 o. 29. 28 
 
 13. 12. 8 
 i. 14. 45 
 
 12. l6 
 
 13. 26. 27 
 
 12. 27. 21 
 
 o. 57. 14 
 o. 58. 44 
 
 I. I. 13 
 
 1. 3. 48 
 
 13. ii. 9 
 13. 12. 8 
 
 I. 15. 17 
 I. 17. 28 
 '3- 38. 55 
 44- 32 
 
 12. 13. 46 
 
 '2- 35- 35 
 
 ' 3- 53 
 i. 34. 31 
 i. 50. 48 
 
 13. 55. 56 
 
 14. 0. 22 
 
 14. 6. 30 
 
 14. 44. 14 
 
 2. 53- >3 
 
 13. 48. 58 
 3- 55- 32 
 15- io- 33 
 
 o 
 
 46-5 
 46-5 
 
 48-8 
 48-8 
 
 39' 2 
 39'* 
 
 4''5 
 45 '9 
 
 53'9 
 52-6 
 52-6 
 52-6 
 52-6 
 52-6 
 52-6 
 52-6 
 52-6 
 50-9 
 50-9 
 
 52-0 
 52-0 
 
 51-8 
 50-1 
 50-1 
 
 48-6 
 48-6 
 48-6 
 47-0 
 47-0 
 
 66-0 
 66-0 
 60-9 
 
 o 
 
 45'9 
 45'9 
 
 47 -6 
 47-6 
 
 37'J 
 37 - > 
 
 40-9 
 45-0 
 
 53'' 
 51-9 
 51-9 
 51-9 
 51-9 
 5''3 
 5>'3 
 5'"3 
 5i-3 
 50-4 
 50-4 
 
 51-0 
 49-8 
 
 51-0 
 49-1 
 487 
 
 477 
 477 
 47'z 
 46-0 
 46-0 
 
 64-3 
 
 64-3 
 6o - i 
 
 7> 
 
 121 
 
 211 
 211 
 
 I 5 6 
 
 5 
 78 
 129 
 
 "5 
 
 47 
 '47 
 164 
 
 197 
 105 
 150 
 
 465 . 
 103 
 244 
 
 270 
 
 72 
 74 
 
 118 
 
 146 
 
 121 
 
 1 66 
 
 102 
 1 06 
 1 3 8 
 6 4 
 
 3 6 
 
 66 
 
 100 
 
 I 
 
 + O'll 
 
 + 0-19 
 
 + 0'44 
 + '44 
 
 + 073 
 + 0-23 
 
 + O'lO 
 
 + 0-25 
 + 0-18 
 
 + 0'2O 
 + O'2I 
 
 + 0-24 
 + 0-29 
 + 0-28 
 + 0-40 
 
 + 1-23 
 
 + 0-27 
 + 0-25 
 + 0-27 
 
 + 0-14 
 + '33 
 
 + O'2O 
 + 0-30 
 
 + '34 
 + 0-31 
 
 + O'2O 
 + 0-31 
 + 0-28 
 + 0-13 
 
 + 0'I2 
 + O'22 
 
 + 0-16 
 
 U Hydras 
 
 Groombridge 96 S.P 
 
 I'.nulli-v 49 S.P 
 
 61 Virginia 
 
 Polaris S.P 
 
 I minus. . 
 
 ~i Virginia R &D 
 
 W. 15. XII. 429 R & D 
 
 15. D. + 59 No. 176 S.P 
 
 B. D. + 59 No. 180 S.P 
 
 G roombridge 244 S.P 
 
 ti Cassiopeia) SP 
 
 5 8 Virginia 
 
 61 Virginia 
 
 Andromedae S.P 
 
 if Cassiopeia) S.P 
 
 Piazzi XIII. 180 
 
 g Persei S.P 
 
 >j Virginia R & D 
 
 / Virginia R &D 
 
 32 Cassiopeiae S P 
 
 Piazzi I. 139 S.P 
 
 B. F. 222 S.P 
 
 Piazzi XIII. 276 
 
 95 Virginia 
 
 K Virginia 
 
 a Libras R <fc D 
 
 Bradley 396 S.P R &D 
 
 >/ Boo tie 
 
 r Virginia 
 
 /3 Libra) R & D 
 
 
 April 12. The rcadinjr of the barometer has also been altered from 2<, 10 '97 to 2c, in- 98. 
 April 27. The rea<lin; of the barometer has also been altered from 3i'"-64 to 2c,' n '63. 
 April 30. The reading of the barometer has also been altered from 3C ln '02 to so*" '03. 
 
(62) CORRECTIONS TO REFRACTION FOK REVISED READINGS OF 
 
 CORRECTIONS TO REFRACTION OF SUN, MOON, PLANETS, &c. continued. 
 
 Date, 1886. 
 
 Star's Name. 
 
 R.A. 
 i88o'j. 
 
 Thermometer. 
 
 Refraction. 
 
 Correction 
 to 
 Refraction. 
 
 Used. 
 
 Corrected. 
 
 June 29 
 June 30 
 
 July 3 
 July 6 
 
 July 10 
 
 July 1 6 
 July 20 
 
 July 22 
 
 August 2 
 
 Piazzi IV. 254 S.P R. & D. 
 
 h m { 
 
 4- 57- 15 
 
 17. 57. 21 
 
 18. 8. 8 
 1 8. 9. 48 
 1 8. II. 40 
 18. ii. 41 
 18. 14. 25 
 18. 17. 15 
 
 15. 38. 21 
 16. 24. 52 
 
 5. 18. 50 
 
 5- 23- 4> 
 
 17. 38. 
 
 1 8. ii. 40 
 18. n. 41 
 18. 17. 15 
 18. 22. 7 
 18. 25. 52 
 1 8. 26. 48 
 
 17. 7- 58 
 17. 10. 42 
 17. 10. 42 
 5- * 6 - 44 
 
 4- 57- 15 
 5- 3- 26 
 17. 48. 51 
 6. 40. 46 
 6. 58. 52 
 
 16. 28. 25 
 
 17. 20. 34 
 17. 39. 24 
 18. 25. 52 
 19. 23. 
 7- 5 1 - 54 
 
 8. 0. 12 
 
 
 
 6i - o 
 
 5^4 
 52-4 
 52-4 
 52-4 
 5^4 
 S^H 
 52-4 
 
 727 
 69-9 
 
 69-0 
 69-0 
 69*0 
 
 56-2 
 56-2 
 56-2 
 56-2 
 56-2 
 56-2 
 
 62-1 
 62-1 
 62-1 
 62-1 
 
 617 
 61-7 
 60-6 
 597 
 59'7 
 
 62-1 
 
 577 
 
 577 
 55-8 
 
 54'9 
 54'9 
 54'9 
 
 
 
 59-8 
 
 51-9 
 51-8 
 51-8 
 51-8 
 51-8 
 51-8 
 51-8 
 
 7I-5 
 69-0 
 
 67-9 
 67-9 
 66-9 
 
 55'5 
 55'5 
 55-5 
 55'o 
 55-0 
 
 55' 
 
 6i'o 
 61-0 
 6ro 
 60-4 
 
 60-7 
 607 
 6o - o 
 58-8 
 58-8 
 
 61-3 
 
 56-9 
 56-5 
 55'3 
 54'3 
 53'3 
 53'3 
 
 
 
 ki 
 
 352 
 1 80 
 322 
 
 160 
 1 60 
 162 
 
 I2O 
 
 56 
 65 
 
 123 
 
 53 
 84 
 
 158 
 
 158 
 119 
 
 58 
 132 
 131 
 
 257 
 217 
 217 
 
 197 
 
 80 
 82 
 157 
 97 
 "37 
 
 292 
 
 62 
 
 59 
 130 
 
 415 
 136 
 156 
 
 i 
 
 + 0'20 
 
 + 0'35 
 + 0-23 
 + 0-39 
 + 0-14 
 + OM4 
 + OM9 
 + 0-15 
 
 + 0-14 
 + O'll 
 
 + 0-26 
 
 + O'I2 
 + 0-35 
 
 + 0-23 
 + 0-23 
 + 0-17 
 + 0-15 
 + 0-3I 
 + 0-31 
 
 + 0-66 
 + 0-45 
 + Q'45 
 + 0-80 
 
 -f 0-16 
 + 0-16 
 + 0-18 
 + 0-14 
 -r- 0'2l 
 
 + 0'47 
 
 + 0'12 
 
 4- 0-14 
 + 0-13 
 + 0-50 
 
 + 0- 44 
 + 0-50 
 
 
 
 Lalande 33537 
 
 Lalande 33642 
 
 Oeltz Arg. (S.) 18017-8 
 
 Lalande 33748 
 
 Lalande 3^871 .. 
 
 
 A Ophiuchi R. & D. 
 
 17 Camelopardi S.P R. & D. 
 Groombridge 944 S.P 
 
 Juno 
 
 
 Oeltz Arg (S ) 18017 8 
 
 Lalande 33873 
 
 Lalande 34128 
 
 Bradley 2323 
 
 Bradley 2327 
 
 A 1 Ophiuchi 
 
 Piazzi XVII 31 
 
 
 Piazzi V 1178? 
 
 Piazzi IV. 254 SP 
 
 Groombridge 928 S.P 
 
 Piazzi XVII 277 . R & D 
 
 
 17 Lyncis SP R &D 
 
 T Scorpii 
 
 a Ophinchi 
 
 W.B. XVII. 751 
 
 Bradley 2323 R. & D. 
 
 Ceres 
 
 Piazzi VII 251 SP R &D 
 
 Groombridge 1407 S P 
 
 
 July 1 6. For A 1 Ophiuchi. Piazzi XVII. 31 and 39 Ophiuohi, the reading of the barometer has also been altered 
 from 29">-85 to 29'" "86 and for Piazzi V. 117 S.P. to 29"" '87. 
 July 20. 43 Camelopardi S.P. and 17 Lyncis S.P. The reading of the barometer has also been altered from 
 29'" '98 to 29'" '97. 
 Aug. 2. a Ophiuchi. The reading of the barometer has also been altererl from 29' '8 1 to 29'" -8 2 ; for W. B. XVII. 
 751, to 29!" -83 ; for 57 Camelopardi S.P., o Capricorni and Piazzi VIII. 105 S.P. from 29">'84 to 29'" -87, the 
 corrections to Refraction being + o*'ii, + o"'i6 and + o"'2i, respectively. 
 
THE EXTERIOR THERMOMETER, IN THE YEARS 1877 TO 1886. (63} 
 
 CORRECTIONS TO REFRACTION OF SUN, MOON, PLANETS, &c. concluded. 
 
 Date, 1886. 
 
 Star's Name. 
 
 R.A. 
 
 1 880-0. 
 
 Thermometer. 
 
 Refraction. 
 
 Correction 
 to 
 Refraction. 
 
 Used. 
 
 Corrected. 
 
 August 4 
 August 10 
 
 August 1 1 
 
 August 26 
 
 August 18 
 August 30 
 
 Sept. 7 
 October 4 
 
 Phrm VIII 40 S P 
 
 h m K 
 
 8- H- 43 
 20. 32. 59 
 8. 37. 56 
 
 17. 48. 51 
 6. 58. 52 
 19. 19. 27 
 
 20. 5. 7 
 
 20. 59. 12 
 9- 26. 36 
 
 18. 42. 33 
 6. 55. 25 
 9- 33- 5' 
 '9- 33- S3 
 19. 53. 16 
 
 8. 23. 50 
 
 8- 29- 43 
 8. 51. 42 
 
 21. 6. 
 
 6. 40, 46 
 7- 2- 3* 
 
 8. 23. 50 
 
 8. 32- 43 
 8. 37. 56 
 
 8. 57- 7 
 18. 42. 33 
 
 19. 21. 62 
 19. 49. 25 
 
 8. 30. 24 
 9. 36. 40 
 9- 47- 37 
 
 18. 36. 
 
 
 
 53'5 
 53'5 
 53'5 
 
 61-5 
 
 58-4 
 58-4 
 56-9 
 55'> 
 SS'i 
 
 56-4 
 56-4 
 
 54'9 
 54'9 
 54'9 
 
 607 
 607 
 607 
 607 
 
 64-5 
 64-5 
 
 63-5 
 63-5 
 63-5 
 63-5 
 
 59-9 
 
 587 
 
 587 
 56-9 
 55'' 
 SS'i 
 
 66-4 
 
 o 
 S 2-8 
 52-5 
 
 5 Z> 5 
 
 60- 1 
 
 57-8 
 57'3 
 55'9 
 54'5 
 54'4 
 
 55'5 
 55'5 
 54'3 
 54'3 
 53'4 
 
 6o - 2 
 
 6<3'2 
 
 59'9 
 59 - 9 
 
 63-9 
 62-5 
 
 62-9 
 62-5 
 62-5 
 6, -4 
 
 59-1 
 
 58-1 
 56-9 
 
 S5 i 
 
 54-6 
 
 54'3 
 65-4 
 
 * 
 211 
 
 81 
 106 
 
 >55 
 
 136 
 64 
 
 74 
 '49 
 224 
 
 '74 
 '45 
 
 ' H' 
 141 
 
 107 
 
 in 
 "5 
 
 JOO 
 
 '93 
 
 t 
 
 61 
 
 in 
 390 
 103 
 296 
 
 172 
 156 
 
 58 
 216 
 119 
 82 
 
 1 60 
 
 
 
 + 0-30 
 + 0-16 
 
 + O'2O 
 + 0-47 
 
 + 0-16 
 + 0-16 
 + 0-18 
 + 0-19 
 + 0-32 
 
 + 0-32 
 + 0-26 
 4- 0-19 
 + 0-18 
 + '33 
 
 + O'I2 
 + 0'12 
 
 + 0-16 
 
 + 0-30 
 + O'll 
 
 + 0-24 
 
 + 0-16 
 + 0-91 
 + 0-25 
 + ''44 
 
 + 0-28 
 + 0-18 
 + 0-23 
 + o - 57 
 
 + 0-12 
 + OM4 
 
 + 0-32 
 
 Hnullev 2659 
 
 Piazzi VIII. 137 S.P 
 
 Piazzi XVII 277 
 
 i7LynciflS.P R &D 
 
 f \quilae 
 
 Aquilae R. & D. 
 
 Capricorn! 
 
 26 Ursae Majoris S.P 
 
 29 Sagittarii 
 
 Piazzi VI 2938? R &D 
 
 
 Oeltz. Arc ( S 1 io8c7 . 
 
 W B XIX 1300 R. & D 
 
 AUrsffi Majoris S.P R. & D. 
 r Ursae Majoris S.P R. & D. 
 p Ursse Majoris S.P 
 
 Aglaia 
 
 43 Camelopardi S.P R. & D. 
 Piazzi VI 285 S P R. & D 
 
 AUrsse Majoris S.P R. & D. 
 34 Lyncis S.P 
 
 Piazzi VIII. 137 S.P. ...R.& D. 
 Groombridge 1508 S P 
 
 29 Sa^ittarii 
 
 Lalande 36688 
 
 /3 Aquilas 
 
 Piazzi VIII. 105 S.P 
 
 28 Ursae Majoris S.P. ...R. & D. 
 Piazzi IV. 187 S.P R. & D. 
 
 jN. L 
 
 
 Aug. 10. Piaui XVII. 277. The reading of the barometer haa also been altered from 29'" '63 to 29'" -65 ; f or <i Aquilie, 
 from 29' '67 to 29' -68 ; for Aquihe R- &. D., from 29'" -69 to 29' n 70. 
 Aug. 30. A Urea; Majoris S.P. R. k D. The reading of the barometer has also been altered from 29'" -92 to 29'" -93, 
 and for the observation of Groombridjre 1508 S.P. to 29'" -94. 
 Sept. 7. ft Aquila;. For this observation the reading of the barometer has also been altered from 29 iD '9Oto 29 ln '9l. 
 
 The above corrections for the years 1877 to 1885 affect the pluiietary reductions in 
 subsequent sections. The corresponding errata are as follows ; 
 
(64) 
 
 ERRATA APPENDIX III. 
 
 ERRATA. 
 
 GREENWICH OBSERVATIONS, 1877. 
 
 PAGB. 
 
 (27) No. 30. Refraction, for I'. 6"-68, rend 1'. 7*'09 ; Geocentric 
 N.P.D. of Centre,/>- 87. 41'. 41''36, read 87. 41'. 41*77. 
 
 (70) No. 2. Refraction, for 1'. B2*'01, read I'. 52*'15 ; Geocentric 
 N.P.D. of Centre, for 101. 13'. 22"'29, read 
 101. 13'. 22''43. 
 
 (70) No. 3. Refraction, for 1'. 51*-98, read V. 52*'12 ; Geocentric 
 N.P.D. of Centre, for 101. 13'. 21"-97, read 
 101. 13'. 22*'ll. 
 
 (70) No. 6. Refraction, for 1'. 38*-87, read 1'. 39*'06 ; Geocentric 
 N.P.D. of Centre,/r 98. 11'. 0*'21, read 98. 11'. 0""40. 
 
 (70) No. 7. Refraction, for 1'. 38*-87, rend I'. 39*'06 ; Geocentric 
 N.P.D. of Centre./ur 98. 10'. 56'-80, read 93. 10'. 53*'99. 
 
 (70) No. 13. Refraction, far 2'. 14"'44, re/i<i 2'. 14*72 ; Geocentric 
 
 N.P.D. of Centre, for 105. 18'. 32*-24, read 
 105. 18'. 32*-52. 
 
 (71) No. 36 Refraction, for 1'. 53"'33, rend V. 53'73 ; Geocentric 
 
 N.P.D. of Centre, far 100. 50'. 26"'92, read 
 100. 50'. 27"'27. 
 
 (71) No. 37. Refraction, fur V. 53"'40, read \'. 53*75 : Geocentric 
 N.P.D. of Centre, fur 100. 50'. 26*'27, read 
 100. 50'. 2G""62. 
 
 (75) No. 9. Refraction, for V. 42"'88, read \'. 43'-17 : Geocentric 
 N.P.D. of Centre,/o;' 99. 30'. 17*'42, read 99. 30'. 1T'-71 
 
 (75) No. 10. Refraction, for V. 42* 88, read V. 43*'17 ; Geocentric 
 N.P.D. of Centre,/or 99. 30'. 17"'G2, readM. 30' 17*'91. 
 
 (75) No. 12. Refraction, fur I'. 38*'23, read V . 38"'52 ; Geocentric 
 N.P.D. of Centre,/or 98. 21'. 34"'5G, read 98. 21'. 31"\S5. 
 
 (75) No. 13. Refraction, for 1'. 38*'23. read V. 88*T>2 : Geocentric 
 N.P.D. of Centre, for 98. 21'. 31"'9C, read 9S. 21'. 32"'25. 
 
 (82) No. 9. Refraction, for \ '. 30*72, read 1'. 30"'88 ; Geocentric 
 N.P.D. of Centre,/or 95. 43'. 51*'03, read 95. 43'. 51' 19. 
 
 (82) No. 10. Refraction, for 1'. 30*72. read V . 30"'88 ; Geocentric 
 N.P.D. of Centre, for 95. 43'. 50*'9H, read 95. 43'. 51*'14. 
 
 33 Mars. Oct. 15. N.P.D. from Observation, fur 101 13'. 22*-00. 
 read 101. 13'. 22"'14 ; Apparent Error of Nautical 
 Almanac in N.P.D., /; 0"'80, read 0*'94. 
 
 33 Mare. Oct. 18. N.P.D. from Observation, for 100. 5(1'. 2G"-47, 
 read 100. 50'. 26*'82 ; Apparent Error of Nautical 
 Almanac in N.P.D. ,for 0"'47, read 0*'82. 
 
 33 Mara. Oct. 27. N.P.D. from Observation, far 99. 30'. 17"'39. 
 read 99. 30'. 1 7"-G8 ; Apparent Error of Nautical 
 Almanac in N.P.D., for 1*'19, read l'-48. 
 
 33 Mars. Nov. 16. N.P.D. from Observation, fur 95. 43'. 50"-89. 
 read 95. 43'. 51"'05 ; Apparent Error of Nautical 
 Almanac in N.P.D. ,for 0*'59, read 0"75. 
 
 GREENWICH OBSERVATIONS, 1877 ctntlnved. 
 
 PAGE. 
 
 34 Vesta. 
 
 34 Hebe. 
 
 Oct. 15. N.P.D. from Observation, for 105. 18'. 32"'1<;, 
 read 105. 18'. 32"'38 ; Apparent Error of Nautical 
 Almanac in N.P.D., fur + 4 30. read + 4*'02. 
 
 May 15. N.P.D. from Observation, for 87. 41'. 41*-27, 
 read 87. 41'. 41*'68 ; Apparent Error of Berliner 
 Jahrbuch in N.P.D., for 18*-97, read 19"'38. 
 
 40 Saturn. Oct. 15. N.P.D. from Observation, for 98. 10'. 5S'-39. 
 read 98. 10'. 58"'58 ; Apparent Error of Nautical 
 Almanac in N.P.D., for S*-49, read 8''68. 
 
 40 Saturn. Oct 27. N.P.D. from Observation, for 93. 21'. 33"'13, 
 read 98. 21'. 33*'42 ; Apparent Error of Nautical 
 Almanac in N.P.D.,/or 11"-13, read 11"'42. 
 
 45 Mars. Oct. 23. Mean Error in N.P.D., far 1"'41. read 
 
 1"'50 ; Error in Longitude, for + 5"'48, read + 5''51 ; 
 Error in E.N.P.D.,/r + 0*-73, read + 0"'65. 
 
 45 Vesta. Oct. 15. Mean Error in N.P.D., fur + 5"'88, read 
 + 5"-79 j Error in Lonfritude. for 13"-22, read 
 
 13"-17 ; Error in E.N.P.D., for + 0*77, read + 0*70. 
 
 4fi Saturn. Oct. 13. Mean Error in N.P.D., for 9*"35, rend 
 
 9*'40 ; Error in Longitude, for 1"'85, read l*-83 ; 
 Error in E.N.P.D.,/o;- 10''93, read 10''97. 
 
 47 Mars. 
 
 48 Vesta. 
 
 49 Saturn 
 
 Oct. 23. Error of Tables in Hel. E.P.D., far + 0*'28, 
 read + 0"'25. 
 
 Oct. 15. Error of Tables in Hel. E.PJX,/r+ 0*'90, 
 read + 0"'85. 
 
 Oct. 13. Error of Tables in Hel. E.P.D., far 9*'99, 
 read 10''03. 
 
 GREENWICH OBSERVATIONS, 18V9. 
 
 (49) No. 20. Refraction, far 3'. 21*'27, read 3'. 21"-63 ; Geocentric 
 N.P.D. of Centre, Jor 112. 55'. 38'"28. read 
 112. 55'. 38"'G4. 
 
 (63) No. 16. Refraction, fur 1'. 43*-32, rea/l I', 42""87 ; Geocentric 
 N.P.D. of Centre, for 99. 35'. 47"'28, read U9. 35'. 4(i'-S3. 
 
 37 Venus. Sept. 2. N.P.D. from Observation, for 99. 35'. 47''39, 
 
 mul 99. 35'. 4(i*-'.l4 ; Apparent Error of Nautical 
 Almanac in N.P.D., fur 0"'19. read + 0''26. 
 
 38 Flora. July 24. N.P.D. from Observation, for 112. 55'. 38''8o, 
 
 mul 112. 55'. 38*71. 
 
 50 Venus. September 1. Mean Error in N.P.D., far 0*'21, 
 read 0*'l>y ; Error in Longitude, for + l*'(iO, read 
 + 1"'G5 ; Error in E.N.P.D../wy 0*'!>2. read 0*'81. 
 
 52 Venus. Sept. 1. Error of Tables in Hel. E.N.P.D., for 
 0*"44, read 0''39. 
 
KliK ATA Al'l-KXlMX III. 
 
 (65) 
 
 GREENWICH OBSERVATIONS, 1880. 
 
 PAGE. 
 
 (19) No. 34. Refraction, far 51*-39. mnl 51*-8S : Geocentric 
 N.P.D. of Centre,/.-;- 80. 13'. 2o'-40, read 80'. 13'. 2.V-89. 
 
 (5) Nos. 29 & 80. Refraction. for >'. 17''37, read 2'. 17*-59 ; 
 Geocentric N.P.D. of Centre,/'/- 105. 57'. 17''47. mnl 
 105. 57'. 17''69. 
 
 (73) No. 3. Refraction, for 41"'07. mnl 40"-75 ; Geocentric 
 N.P.D. of Centre,/or 74. 54'. 16*-i>5. read 74. 54'. 16"'33. 
 
 39 Sun. Aug. 11. N.P.D. from Observation, for 74. 54'. 16'"92, 
 read 74. 54'. 16"'60 ; Apparent Error of Nautical 
 Almanac in N.P.D., for 2"-i)i>. /v ad 1*'70. 
 
 41 Moon. July !.">. N.P.D. from Observation,/,!/- 105. 57'. 17''61, 
 rniil 105. 57'. 17'-83 ; Apparent Error of Nautical 
 Almanac in N.P.D.,/or + 3'-5'J, read + 3' 37. 
 
 48 Uranus. March 1. N.P.D. f rom Observation./or 80. 12". 25*-67, 
 mnl 80. 12'. 26'-16; Apparent Error of Nautical 
 Almanac in N.P.D.,/,.;- 2*'47, read 2*"96. 
 
 52 Sun. August 22. Mean Error in N.P.D., for + 0*'21, read 
 + 0"'2a ; Error in Longitude, far + 0*'96, read 
 + 0'-97 ; Error in E.N.P.D../r 0*-13, read O'-IO. 
 
 54 Uranus. February 23. Mean Error in N.P.D., for l'-24, 
 read l*-32 ; Error in Longitude, for 1"'88, read 
 
 r-77 ; Error in E.N.P.D.,/r 0*'59, read 0"'66. 
 
 57 Uranus. February 23. Error of Tables in Hel. E.N.P.D., for 
 
 0'-5o, read 0'"62. 
 
 60 Moon. July 15. Error in N.P.D., for + 3"'59, read + 3''37 ; 
 in Longitude, for + ll'-43, read + ll'-35 ; inE.N.P.D., 
 fur 0*-53, read, 0''73. 
 
 GREENWICH OBSERVATIONS, 1881. 
 
 (18) No. 31. Refraction, for 56* -61. not Geocentric 
 
 N.P.D. of Centre, for 81. 51'. 2U''S5, read 81. 51'. 20"'76. 
 
 (3rt) No. 28. Refraction, for 1'. 20"'49, read 1'. 20*-81 ; Geocentric 
 N.P.D. of Centre, far 92. Il'.34*-83,;rarf92 c . ll'.35*-15. 
 
 (..IS) Nos. 4 & 5. Refraction, for 2'. 12"-36. read 2'. 12'-39 ; Geo- 
 centric N.P.D. of Centre, for 103. 39'. 58'-45, read 
 103. 39'. 58"-68. 
 
 (40) Nos. 26 & 27. Refraction, for 40*'30, read 40''00 ; Geocentric 
 N.P.D. of Centre,/or 74. 5'. 12*'50, read 74. 5'. 12*"20. 
 
 (58) No. 13. Refraction, for 1'. 1''87, read I'. l'-97 ; Geocentric 
 N.P.D. of Centre, for 8. 48'. 52*'28, read 
 
 8. 48'. 52*-38. 
 
 36 Moon. May 11. N.P.D. from Observation, for 103. 39'. 58"-97, 
 mnl 103. 39'. 59*-20 ; Apparent Error of Nautical 
 Almanac in N.P.D.,/or + 4*'68. read + 4*'40. 
 
 :i7 Moon. June 1. N.P.D. from Observation, for 74. 5'. 12'-85, 
 read 74. 5'. 12*'55 ; Apparent Error of Nautical 
 Almanac in N.P.D., far 4'-15, read 3'"85. 
 
 41 Juno. May 7. N.P.D. from Observation, for 92. 11'. 35'-30, 
 read 92. 11'. 35'-62 ; Apparent Error of Nautical 
 Almanac in N.P.D.,/or 7"-.">n. read 7"'82. 
 
 45 Comet * 1881 S.P. July 11. N.P.D. from Observation, for 
 
 8. 48'. 52*-64, read 8. 48'. 52*-74 ; Apparent Error 
 of Ephemeris inN.P.D.,/or -|-2'-89, ivwZ + 2*-79. 
 
 47 Uranus. March 15. N.P.D. from Observation./or 81. 51'. 20*'95, 
 read 81. 51'. 21*16 ; Apparent Error of Nautical 
 Almanac in N.P.D., for 2*'05, read 2*'26. 
 
 GBBENWICH OBSERVATIONS. 1887. 
 
 GREENWICH OBSERVATIONS, ISSleo 
 
 PAGE. 
 
 53 Juno. May 12. Mean Error in N.P.D., for 6'-28,read 5'-36 ; 
 Error in Lonjritude./or 45*'18, read 45*"20 ; Error 
 in E.N.P.D.,/,.;- +6'-62, read +6"-:.0. 
 
 53 Uranus. March 18. Mean Error in N.P.D., for l*-87, ;<</ 
 
 r-89 ; Error in Longitude, for 2' -29, read 2" -SO ; 
 Error in E.N.P.D., for 1*'08, read l'-10. 
 
 56 Juno. May 12. Error of Tables in Hel. E.N.P.D.,/r + 4'-57, 
 
 read + 4*-53. 
 
 57 Uranus. March 18. Error of Tables in Hel. E.N.P.D., for 
 
 l'-02. read l'-Q*. 
 
 59 Moon. May 11. Error in N.P.D., for +4*-68, read + 4'-40 ; 
 In Longitude, for + 10'-68, read + 10*'59 ; In E.N.P.D., 
 for + 0-74, read + 0*'62. 
 
 59 Moon. June 1. Error in N.P.D., for 4"'16, read S"'85 ; 
 In Longitude, for + 3'-87, read + 3*'94 ; In E.N.P.D., 
 far 5*-14. read 4*"85. 
 
 GREENWICH OBSERVATIONS, 1882. 
 
 (10) No. 6. Refraotion,/or 46'-54, read 46'-65 ; Geocentric N.P.D. 
 of Centre,/r 75. 42'. 21*-03, read 75. 42'. 21''14. 
 
 (19) No. 22. Refraction, far I'. 0*-50, read I'. 0*'86 ; Geocentric 
 N.P.D. of Centre, for 83. 55'. 52*'62, read 83. 55'. 52*'98. 
 
 (21) No. 15. Refraction, for I'. 0*-44, read I'. 0*'72 ; Geocentric 
 N.P.D. of Centre,/ur 83. 48'. 47*'54, read 83. 48'. 47' '82. 
 
 (21) No. 16. Refraction, for I'. 0*-44, read 1'. 0'-72 ; Geocentric 
 N.P.D.of Centre,/(.r83. 48'. 45*'69, read 88. 48'. 4:. '.'7. 
 
 (43) NOB. 13 & 14. Refraction, for 1'. 20'-79, read 1'. 21*-03 ; Geo- 
 centric N.P.D. of Centre, for 15. 32'. 88*-46. n ml 
 15. 82'. 38*-70. 
 
 (50) NOB. 31 & 32. Refraction, for 1'. 18*'20, read 1'. 18*'99 ; Geo- 
 centric N.P.D. of Centre, for 92. 19'. 82*'89, read 
 92. 19'. 33*-68. 
 
 (74) No. 14. Refraction,/or44'-67,rea<*44'-84; Geocentric N.P.D. 
 of Centre,/or 76. 19'. 45'-81, read 76. 19'. 45'-98. 
 
 (84) No. 13. Refraction,/r 43*'l 7, read 43'-29 ; Geocentric N.P.D. 
 of Centre, for 75. 26'. 16*'S6, read 75. 26'. 16*"48. 
 
 40 Moon. May 26. N.P.D. from Observation, for 92. 19'. 33"-29, 
 rwn) 92. 19'. 34'-08 ; Apparent Error of N.P.D. in 
 Nautical Almanac, for + l'-ol, read + 0*72. 
 
 44 Pallas. Aug. 11. N.P.D. from Observation, for 76. 19'. 46'-13 
 read 76. 19'. 46* '30 ; Apparent Error of N.P.D. in 
 Nautical Almanac,/or 0*'63, read 0*'80. 
 
 47 Sappho. Sept. 12. N.P.D. from Observation, for 75. 26'. 16*'68, 
 read 75. 26'. 16*'80 ; Apparent Error of N.P.D. in 
 Berliner Jahrbuch,/or + 1'. 88*-71, read + I''. S3'-59. 
 
 49 Uranus. Mar. 6. N.P.D. from Observation, for 83. :.:>'. 52*-98, 
 read 83. 55'. 53*-34 ; Apparent Error of N.P.D. in 
 Nautical Almanao,/r + u" :n'. mid + 0*'56. 
 
 49 Uranus. Mar. 13. N.P.D. from Observation, for 83. 48'. 46*'98, 
 read S3'. Iff. 17 JC; Apparent Error of N P.O. in 
 Nautical Almanac, for + l'"72, read + l'-44. 
 
 49 Neptune. Feb. 1. N.P.D. from Observation, for 75. 42'. 21*'S5, 
 r,-a,l i:.\ li'. 21*-46; Apparent Error of N.P.D. in 
 Nautical Almanac,/r l*-63, read l"-76. 
 
(66) 
 
 ERRATA APPENDIX III. 
 
 GREENWICH OBSERVATIONS, 1882 continued. 
 
 PAGE. 
 
 50 Comet a 1882 S.P. May 12. N.P.D. from Observation, for 
 15. 32'. 38*-72, read 15. 32'. 38"'96. 
 
 55 Uranus. March. 13. Mean Error in N.P.D., for + 1"'62, 
 read + 1*'57 ; Error in Longitude, for + 3"'23, n-ad 
 + 3"'21 ; Error in E.N.P.D.. /<)) + 0"-39, read + 0"'35. 
 
 58 Uranus. March 13. Error of Tables in Hel. E.N.P.D., for 
 + 0"-37, read + 0"'33. 
 
 60 Moon. May 26. Error in N.P.D., for + l'-51, read + 0''72 ; 
 In Longitude, for + 7"'67, read + 7""36 ; In E.N.P.D., 
 for 1*'64, read 2""37. 
 
 GREENWICH OBSERVATIONS, 1883. 
 
 (17) No. 32. Refraction,/or42"'92. /r<7**43''13; Geocentric N.P.D. 
 of Centre./or 74. 14'. 55"-33, read 74. 14'. 55"'54. 
 
 (17) No. 33. Refraction./*) )-42"'92, read 43"-13; Geocentric N.P.D. 
 of Centre,/*)/- 74. 14'. 54"-58, read 74. 14'. 54'-79. 
 
 (41) No. 1. Refraction, for 1'. 44"'69, read 1'. 45"-12 ; Geocentric 
 N.P.D. of Centre,/*))' 99. 8'. 19"-24, read 99. 8'. 19"'67. 
 
 (41) No. 2. Refraction, for 1'. 44*-69. read 1'. 45*'12 ; Geocentric 
 N.P.D. of Centre,/*))- 99. 8'. 16*'77, read 99. 8'. 17"'20. 
 
 (55) No. 34. Refraction, for 50"-44, read 50"-14 ; Geocentric 
 N.P.D. of Centre,/oc 80. 6'. 30"'37, read 80. 6'. 30"'07. 
 
 (57) No. 30. Refraction, for 3'. 21"'64, read 3'. 22"'13 ; Geocentric 
 N.P.D. of Centre, for 112. 52'. 50"'16, read 
 112. 52'. 50"'65. 
 
 (57) No. 31. Refraction,/r 4'. 36"'61, read 4'. 37"'28 ; Geocentric 
 
 N.P.D. of Centre, for 117. 9'. 53*'96, read 117. 9'. 54"'63. 
 
 (58) No. 3. Refraction,/*)?' 33"'39, read 33"-05 ; Geocentric N.P.D. 
 
 of Centre,/*)?- 69. 3'. 34"'47, read 69. 3'. 34"'13. 
 
 (58) No. 4. Refraction,/*)/- 32"'70, read 32"'36 ; Geocentric N.P.D. 
 of Centre,/*))' 69. 3'. 37"'44, read 69. 3'. 37"'10. 
 
 (61) No. 29. Refraction, /*)? 3'. 17"'34. read 3'. 18*'43 ; Geocentric 
 N.P.D. ofCentre,/*))- 112. 23'. 39"'47, read 112. 23'. 40''56. 
 
 (63) No. 23. Refraction, for I'. 19"-33, read I'. 19"-60 ; Geocentric 
 
 N.P.D. of Centre, for 92. 45'. 56*'36, read 92. 45'. 56" '63. 
 
 (64) No. 1. Refraction,/*))- 31"'30, read 31"'08 ; Geocentric N.P.D. 
 
 of Centre,/*-/- 67. 27'. 23*-65, read 67. 27'. 23"'43. 
 
 (64) No. 2. Refraction,/or 30"-62, read 30"'40 ; Geocentric N.P.D. 
 of Centre,/or 67. 27'. 23"-30, read 67. 27'. 23"'08. 
 
 (88) No. 16. Refraction,/*)/- 36"-26, r*;a*f 36"'00 ; Geocentric N.P.D. 
 of Centre,/*);- 71. 38'. 40'-80, read 71. 38'. 40'-54. 
 
 (134) No. 18. Refraction, for 3'. 33"-63, read 3', 32"'61 ; Geocentric 
 N.P.D. of Centre./*) ) 113. 25'. 43"-64,r<;a<m3. 25'. 42"'62. 
 
 (134) No. 19. Refraction./or3'. 33"-58. read 3'. 32"-56 ; Geocentric 
 N.P.D. of Centre,/*)?- 113. 25'. 45'-59, read 113. 25'. 44" '57. 
 
 56 Sun. May 24. N.P.D. from Observation, for 69. 3'. 36'"29, 
 
 read 69. 3'. 35*-95 ; Apparent Error of N.P.D. in 
 Nautical Almanac./or + 1*-11, read + l'-45. 
 
 57 Sun. June 4. N.P.D. from Observation, for 67. 27'. 23'-79, 
 
 read 67. 27'. 23""67 ; Apparent Error of Nautical 
 Almanac in N.P.D../or l"-69, read l'-47. 
 
 GREENWICH OBSERVATIONS, 1883 continued. 
 
 PAGE. 
 
 61 Venus. Aprils. N.P.D. from Observation, far 99. 8'. ls"'59. 
 
 /Kid 9U. 8'. 19"-02 ; Apparent Error of N.P.D. in 
 Nautical Almanac, for 1"'79, read 2" '22. 
 
 til Venus. May 22. N.P.D. from Observation, for 80. 6'. 3()"'81, 
 rend 80. 6'. 30"'51 ; Apparent Error of N.P.D. in 
 Nautical Almanac, fur 4"'71, read 4"'41. 
 
 62 Venus. Aug. 13. N.P.D. from Observation, for 71. 38'. 41"'16. 
 
 mid 71. 38'. 40"-90 ; Apparent Error of N.P.D. in 
 Nautical Almanac, fur 1"'86, read 1*'60. 
 
 62 Venus. Nov. 23. N.P.D. from Observation, for 113. 25'. 4.V-27, 
 n-ad 113. 25'. 44"'2.j ; Apparent Error of Nautical 
 Almanac in N.P.D., fur 1*'57. read 0"'5o. 
 
 64 Hygeia. May 24. N.P.D. from Observation, for 112. 52'. 50'-81, 
 read 112. 52'. 51*-30 ; Apparent Error of N.P.D. in 
 Berliner Jahrbuch,/*))- + 0'. 32'-45, read + 0'. 31'"96. 
 
 64 Hygeia. May 31. N.P.D. from Observation. /or 112. 23'. 40*'12, 
 read 112. 23'. 41"'21 ; Apparent Error of N.P.D. in 
 Berliner Jahrbuch. for + 0'. 34"'22, read + 0'. 33"'13. 
 
 04 Melpomene. June 4. N.P.D. from Observation./*))- 92. 45'. . r )6"'90, 
 read 92. 45'. (r>7"-17) : Minutes and Seconds of N.P.D. 
 in Berliner Jahrbuch, fur 45'. (42*'66), read 45'. 42'-66 ; 
 Apparent Error of N.P.D. in Berliner Jahrbuch. for 
 0'. H"-24. read 0'. 14"'51. 
 
 64 Amphitrite. May 24. N.P.D. from Observation,/*)?' 117. 9'. 54"'62, 
 read 117. 9'. 55"'29 ; Apparent Error of N.P.D. in 
 Berliner Jahrbuch, fur 0'. 2*'44, read 0'. 3"'ll. 
 
 66 Saturn. Feb. 1C. N.P.D. from Observation, for 74. 14'. 55"-34. 
 read 74. 14'. 55""55 ; Apparent Error of N.P D. in 
 Nautical Almanac, /*') I"'(i4, read 1'85. 
 
 72 Venus. April 2. Mean Error in N.P.D.,/*))- 1*'80, read 1-S6 : 
 Error in Longitude, fur + 1"'09, read -4- l*'ll ; Error 
 in E.N.P.D.,/())' l"'ol, read 1"'57. 
 
 72 Venus. Aug. 19. Mean Error in N.P.D.. for + 0'13. mia 
 + O'"08 ; Error in Longitude, for + 0"'82, read + 0"'80 ; 
 Error in E.N.P.D.,/*))' 0"'13, read 0"-17. 
 
 72 Venus. Nov. 30. Mean Error in N.P.D.. for 1''99. read 
 1'-78 ; Error in E.N.P.D.,/*)/- 2"'04, read 1"'83. 
 
 74 
 
 Venus. April 2. Error of Tables in Hel. E.N.P.D., for 2"'12, 
 mid 2'-21. 
 
 74 Venus, i Aug. 19. Error of Tables in Hel. E.N.P.D.,/*))- 0*-31. 
 read 
 
 74 Venus. Nov. 30. Error of Tables in Hel.'E.N.P.D.,/*)/- 4'-48, 
 read 4 '03. 
 
 GREENWICH OBSERVATIONS, 1884. 
 
 (24) No. 30. Refraction, for 1'. 8"'83, read 1'. 9"'02 ; Geocentric 
 N.P.D. of Centre,/*))' 87. 51'. 48"-ll, read 87. 51'. 4S"'30. 
 
 (32) No. 16. Refraction./*))-33"-74. read 33"-85 ; Geocentric N.P.D. 
 of Centre, for 68. 10'. 9*-33, read 68. 10'. 9"'44. 
 
 (32) No. 17. Refraction./o/-33''72, reo<2 33' -83; Geocentric N.P.D. 
 of Centre, far 68. 10'. 7'-53, read 68. 10'. 7'-64. 
 
 (32) No. 30. Refraction, for 1'. 0'-55, read 1'. 0"'72 ; Geocentric 
 N.P.D. of Centre, for 83. 51'. 7''63, read 83. 51'. 7*'80 
 
ERRATA APPENDIX III. 
 
 (67) 
 
 GREENWICH OBSERVATIONS. 1884 f ontin,,l. 
 
 PAGE. 
 
 (32) No. 31. Refraction, for 1'. 8*'94. mid 1'. 9'-14 ; Geocentric 
 N.P.D. of Centre. /or 87. 34'. 19*'2ti. n ml 87. 34'. 19''40. 
 
 (37) No. 14. Refraction./cr 48'-50, read 48'-62 ; Geocentric N.P.D. 
 of Centre, for 77. 56'. 29"-:>. read 77. :.<i'. 2!l''68. 
 
 (39) No. 27. Refraction, for I'. 7'-40. read 1'. 7'"63 ; Geocentric 
 
 N.P.D. of Centre, /r 87. 9'. 25'-46, read 87. 9'. .' tM. 
 
 (40) No. 7. Refraction./<ir 36'-38. readW'Sl ; Geocentric N.P.D. 
 
 of Centre,/-;- 70. 18'. 18'-27. mid 70. 18'. 18''50. 
 
 (40) No. 8. Refraction, fur 3f," -37. rend 36""60 ; Geocentric N.P.D. 
 of Centre./oY 70. 18'. 17'72, read 70. 18'. 17''95. 
 
 (47) Nos. 15&16. Refraction, fur 2'. 39*'66, read 2'. W'SS ; 
 Geocentric N.P.D. of Centre, for 108. 20'. 30''38, read 
 108. 20'. :) 
 
 (86) No. 12. Refraction, for 3'. 20'-16, read 3'. 20'-85 ; Geocentric 
 N.P.D. of Centre, for 112. 38'. 32*'29, rtad 
 112. 38'. 32' 98. 
 
 53 Moon. May 11. N.P.D. from Observation, for 108. 20'. 30'-7, 
 nad 108. 20'. 31*-16 : Apparent Error of N.P.D. in 
 Nautical Almanac, for 4''27. nad 4''46. 
 
 56 Mars. April 22. N.P.D. from Observation, for 70. 18'. 18'"32, 
 
 7c. 18'. 18'-.-,5 : Apparent Error of N.P.D. in 
 Nautical Almanac./or + 0*"88. read + O'-IS. 
 
 57 Vesta. Aupnst 5. N.P.D. from Observation, for 
 
 112. 38'. 32"'89. read 112. 38'. 33''58 ; Apparent Error 
 of N.P.D. in Nautical Almanac, for + 4*71. /<,/ 
 + 4''02. 
 
 58 Irene. April 9. N.P.D. from Observation, for 77. 56'. 29''95, 
 
 read 77. 56'. 30'~07 ; Apparent E'rror of N.P.D. in 
 Berliner Jahrbuch,/'/- 0'. 29*'98. read 0'. 30''10. 
 
 60 Alcmene. Mar. 24. N.P.D. from Observation, for 
 
 83. r>l'. S*-n7. mi,! s3. SI'. 8'-24 ; Apparent Error of 
 N.P.D. in Berliner Jahrbuch, fur 0'. 5*79, read 
 0'. 5'-96. 
 
 61 Jupiter. Mar. 11. N.P.D. from Observation, for 68. 10'. 8'73, 
 
 ' 68. 10'. 8'-84 ; Apparent Error of N.P.D. in 
 Nautical Almanac, for + 0'-67. read + 0''56. 
 
 62 Uranus. Mar. 7. N.P.D. from Observation, for 87. 51'. 48''58, 
 
 read 87. 51'. 48'77 ; Apparent Error of N.P.D. in 
 Nautical Almanac, for + l*-92, read + 1'73. 
 
 62 Uranus. Mar. 24. N.P.D. from Observations./or 87. 34'. 19'-67, 
 nad 87. 34'. 19''87 ; Apparent Error of N.P.D. in 
 Nautical Almanac, fur + 2*-03, read + l'-83. 
 
 62 Uranus. April 21. N.P.D. from Observation, for 87. 9'. 25*-93. 
 mul 87. 9'. 26'-16 ; Apparent Error of N.P.D. in 
 Nautical Almanac, for 0'-33, read 0*-56. 
 
 73 Moon. May 11. Error in N.P.D., for 4''27. read 4'"46 ; 
 In Longitude, for + 0'-43. read +0''41 ; In E.N.P.D., 
 for 4'-37. read 4*-55. 
 
 GREENWICH OBSERVATIONS, 1885. 
 
 (15) No. 15. Refraction, for 47'-88. read, 48''38 : Geocentric 
 N.P.D. of Centre, for 77. 37'. 32*'35, read 
 77. 37'. 32'-85. 
 
 GREENWICH OBSERVATIONS, 188-, rontitu,,!. 
 
 PAGE. 
 
 (15) No. 16. Refraction, for 47*'88. read 48'-38 ; Geocentric 
 
 N.P.D. of Centre, for 11. 37'. 2'.f".ll. 'read 
 
 77. 37'. 30"'41. 
 
 (39) No. 14. Refraction, far 53''85, read 63'75 ; Geocentric 
 N.P.D. of Centre, fur 81. 4" . .Mi u;i. read 81. 40'. 55'-99. 
 
 (39) No. 15. Refraction, for 53'-8:>. read 53'75 ; Geocentric 
 N.P.D. of Centre./.'/- 8P. HI . :,:' -\->. ,r<irf81. 40'. 57*'02. 
 
 (44) No. 2. Refraction, fur 37'-79. ail :7'-89 ; Geocentric N.P.D. 
 of Centre, >r 71. 35'. 2'M3. read 71. 5.V. 2"-23. 
 
 (58) No. 27. Refraction, for r4"-n2. /.</ 54'M4 ; Geocentric 
 N.P.D..of Centre, /r 81. 42'. 45''67, rca^81.42'. 45'"79. 
 
 (66) Noe. 19 k 20. Refraction, for 2'. 44'"29, read 2'. 44'-46 ; Geo- 
 centric N.P.D. of Centre, for 108. 27'. 20"'85, read 
 108. 27'. 21*'02. 
 
 (75) Noe. 17 & 18. Refraction, for >'. 34'-39, read 2'. S4'-61 ; Geo- 
 centric N.P.D. of Centre, for 107. 38'. 57''88, read 
 107. 83'. > M 
 
 (75) No. 29. Ref raction. for I'. 50''50, readl'.WW; Geocentric 
 N.P.D. of Centre, for 100. 51'. 34''19 read ! 00.51'. 34''66. 
 
 50 Moon. June 26. N.P.D. from Observation./r 108. 27'. 21"-47, 
 n ml 108. 27'. 2K-64 ; Apparent Error of N.P.D. in 
 Nautical Almanac, for + O'-IS, read 0*"04. 
 
 50 Moon. July 22. N.P.D. from Observation, for 1 07. 33'. 58''50, 
 read 107. 33'. 58"'72 ; Apparent' Error of N.P.D. 
 in Nautical Almanac, fur (C'60, read 0'~82. 
 
 52 Venns. April 17. N.P.D. from Observation, for 81. 40'. 67" '06, 
 read 81. 40'. ."r,"-96 ; Apparent Error of N.P.D. in 
 Nautical Almanac,/r l'-16, read l'-06. 
 
 54 Ceres. May 23. N.P.D. from Observation, for 81. 42'. 46"'12, 
 read 81. 42'. 46"'24 ; Apparent Error of N.P.D. in 
 Nautical Almanac,/or 7*'02, read 7'"14. 
 
 54 Pallas. April 27. N.P.D. from Observation, fur 71. 5.1'. 2'-Bl, 
 
 rend 71. 55'. 2"'61 ; Apparent Error of N.P.D. in 
 Nantical Almanac,/r l'-21, read l'-Sl. 
 
 55 Hebe. July 22. N.P.D. from Observation, for 100. 51'. 34'-78. 
 
 read 100. 51'. 35*'25 ; Apparent Error of N.P.D. in 
 Berliner Jahrbuch. for o'-55, read l"-(i2. 
 
 57 Jnplter. February 19. N.P.D. from Observation, fur 
 IT. 37'. sr-66, read 77. 37'. 32*-05 ; Apparent Error 
 of N.P.D. in Nautical Almanac, for -f- l"-95, nail 
 + l'-45. 
 
 64 Jupiter. February 23. Mean Error in N.P.D., fur + 0*'06. 
 read ^'02 ; Error in Longitude, for + 0' - 20, read 
 + O'-n ; Error in E.N.P.D.,/or O'-Ol, read O'"09. 
 
 68 Jupiter. February 23. Error of Tables in Hel. E.N.P.D., 
 far O'tll. read 0*'07. 
 
 70 Moon. June 26. Error in N.P.D., for + O'-IS, read 0''04 ; 
 In E.N.P.D., for + O'-IS, read 0'-04. 
 
 70 Moon. July 22. Error in N.P.D.. for 0*-62. read 0'-84 ; 
 In Longitude, for + 4"'78. read + 4*75 ; In E.N.P.D., 
 for l'-18. read I 
 
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