TO MEMORIAL rviiis Str Math. Dt0t> NEW METHOD CORRECTING LUNAR DISTANCES, AND IMPROVED METHOD OF FINDING THE ERROR AND RATE OF A CHRONOMETER BY EQUAL ALTITUDES. BY WILLIAM CHAUVENET, LL. D., CHANCELLOE OF WASHINGTON UNIVERSITY, ST. LOUIS, LATE PEOFESSOB OF MATHEMATICS AND ASTEONOMY IN THE U. S. NAVAL ACADEMY, ETC. EXTRACTED FROM THE APPENDIX TO THE AMERICAN EPHEMERIS FOR 1857, BY AUTHORITY OF THE BUREAU OF NAVIGATION, NAVY DEPARTMENT, WASHINGTON. NEW YORK: D. VAN NOSTRAND, 192 BROADWAY. LONDON : TBUBNEE & CO. 1868. t . . a . $ S \ J* - * "a a > jV o V 5KJW -* ' , ,..',* k!XC"-:5.ojAv' . NEW METHOD OF CORRECTING LUNAR DISTANCES FROM THE APPENDIX TO THE AMERICAN EPHEMERIS AND NAUTICAL ALMANAC FOB 1855. 812165 DIRECTIONS FOR USING THE TABLES FOR CORRECTING LUNAR DISTANCES. THE object of these Tables is to give the true correction of a lunar distance in all cases when, with the apparent distance of the moon from the sun, a planet, or star, the apparent altitudes of the two objects have also been obtained by observation. They enable us readily to take into account, 1st, the parallax of the moon in the latitude of the observer, allowing for the spherpidal figure of the earth ; 2d, the parallax of the sun or a planet ; 3d, the true atmospheric refraction, allowing for the actual state of the air as shown by the barometer and thermometer ; and 4th, that effect of refraction which gives the apparent discs of the moon and sun an oval or elliptical figure. The longitude deduced from a iunar observation, when no attention is paid to the spheroidal figure of the earth, to the barometer and thermometer, and the elliptical figure of the discs, may in certain cases be in error a whole degree. It is true these extreme cases are rare in practice; but cases are common in which from such neglect the error in the longitude is 10', 15', or 20'. Since lunars are now chiefly valuable as checks upon the chronometer, it is absolutely necessary to get rid of such errors, and to leave no other inaccuracy in the result than that which unavoidably follows from the observations. This is accomplished by means of these Tables, with an amount of labor very little greater than that which is required by the inaccurate methods in common use. THE OBSERVATION. The record of a complete observation embraces, 1. The latitude and approximate longitude of the place of observation. 2. The approximate local time. 3. The time of observation as shown by a chronometer, and the error of the chro- nometer, or its difference from mean Greenwich time. 4. The apparent distance of the moon's b *ight limb from a star or planet, or from the nearest limb of the sun. 5. The apparent altitude of the moon's upper or lower limb above the sea horizon. 6. The apparent altitude of the star, planet, or lower limb of the sun above the sea horizon. 5 CORRECTION OF * - _ 7, The height of the barometer and thermometer. ' :: .- 8. The hei-ght of the eye above the level of the sea. 9. The index correction of the sextant, if a sextant is used. I *.?<[ '!J)he i indfix corrie*ction of the sextant may be supposed to be previously determined , but, since even in the best instruments it is not constant, its determination should be considered a necessary part of the observation ; and when the greatest precision is sought, it should be found both before and after the measurement of the distance, and its mean value taken. The error of the chronometer above alluded to is that which is obtained by apply- ing the daily rate (multiplied by the proper number of days) to the error found before leaving port. The agreement or disagreement of the error thus found with that found by the lunar observation will be the test of the good or bad going of the chronometer. PREPARATION OF THE DATA. Greenwich Date. Correct the chronometer time for its error from Greenwich time and deduce the Greenwich Date, i. e. the Greenwich day and hour (mean time), reckoning the hours in successionfrom to 24, beginning at noon. Nautical Almanac. With the Greenwich Date enter the Almanac and take out the moon's semidiameter and horizontal parallax ; and if the sun is observed, its semi- diameter and horizontal parallax ; * but if a planet is observed, its horizontal parallax only. Apparent Altitude of the Moon. To the altitude given by the sextant apply the index correction of the instrument and subtract the dip of the horizon, Table I. If the lower limb is observed, add the semidiameter augmented by Table II. ; if the upper limb is observed, subtract the augmented semidiameter. The result is the apparent altitude of the moon's centre, denoted " Jc'j * The parallax of a star being zero, its " reduced parallax and refraction " become, of course, merely its " reduced refraction"; but as no mistake can arise from marking it as " ^a P. fr R." this designation has been retained in order to give simplicity and uniformity at once to the rules and the tables. t No interpolation is required in taking out these logarithms. 7 CORRECTION OF whole corr. according to their signs ; the result is the First Correction of Distance, which is to be added to or subtracted from the apparent distance, according as its sign is -f- or . Second Correction of Distance. Enter Table VI. with the Apparent Distance and the First Correction of Distance, and take out the Second Correction of Distance, which is to be applied to the distance according to the directions in the side columns of the Table. Correction for the Elliptical Figure of ike Moon's Disc, or Contraction of ike Moon's Semidiameter (Table VII.). Er.'er Table VII. A. with the error in the Greenwich time ; and since, even with the best observers, a single set of distances is subject to a possible error of 10", it may be well to consider the chronometer as still to be trusted so long as it does not differ from the lunar by more than 20 8> . Since, however, so much depends upon skill in measuring the distance, the observer can only form a correct judgment of the degree of dependence to be placed upon his own observations by repeated trials and a care- fui comparison of his several results. CORRECTION OF EXAMPLE L In Lat. 35 30' N., Long. 30 W., by account, on September 7th, 1855, about 6" A. M., the Greenwich chronometer showing 8 h- 29 m - 57 8> .5 and supposed to be fast 21 m - l'-.5 ; the observed distance of O's and C 's nearest limbs is 43 52' 10" ; ob- served alt. _0_ 49 32' 50"; observed alt. 5 27' 10"; barometer 29.1 inches, thermometer 75 ; height of the eye above the sea 20 feet ; index correction of the sextant 0. What is the error of the chronometer on Greenwich time according to these observations? Preparation of the Data* Chronometer (Fast) Greenw. date Sept. 6 h. m. B. 8 29 57.5 21 1.5 d 's semid. N. A. Aug. Tab. II. d 's aug. Semid. 20 8 56.0 Obs'd Alt. Dip Tab. I. C 's aug. semid. C 's App. Alt. 1 II 49 32 50 4 23 +15 1 49 43 28 Obs'd alt O Dip 0's semid O'* App. Alt. d'sRed.R. Tab. IV. Barom. Tab. IV. A. Therm. Tab. IV. B. 4'sRed.R. 4'Red.P. i H 1 16 3 4 1 9 54 23 O's Red. R. Tab. IV. Barom. Tab. IV. A. Therm. Tab. IV. B. 's Par. 4 ' Red . P. &- R. 53 14 's Red. P.frR. 14 50.0 +11.2 (t'sPar.N.A. Aug. Tab. in. C's/fed.P. 54 19.4 +3.6 15 1.2 54 23.0 O 1 II 5 27 10 4 23 -1-15 55 Obs'd distance Ol d 's aug. semid. Q's semid. App. Dist. O 1 I/ |d 43 52 10 + 15 1 -+-1555 5 3* 42 4423 6 8 57 16 28 8 13 T~5 Computation of the True Distance. A. log. A. Tab. V. 0.0021 log. d 's Bed. P.& R. TabJX. 3.5043 log. sin. a 's App. Alt. 9.8825 log. cot. App. Dist. 0.0093 C. log. C. Tab. V. 9.9949 log.O'sRed.P.&R. TablX. 2.6857 log. sin. O's App. Alt. 8.9929 log. cot. App. Dist. 0.0093 App. Dist 1st corr. Zdcorr. Tab. VI Contraction of d ' ) Semid. Tab. VII. 5 Contraction of Q's > ewm/.Tab.VIII.5 Corr. for compression True Distance 44 fc 6 +42 18 16 20 3 C log. Tab. IX. 3.3982 \ 1st Part d 's corr. +41 ' 42" B. log. B. Tab. V. 9.9951 log. d 's Red. P. & R. 3.5043 log. sin. O's App. Alt. 8.9929 log. cosec. App. Dist. 0.1552 C log. Tab. IX. \ 1st Part O'* corr. D. log. D. Tab. V. log. O's Red. P & R. log. sin. d 's App. Alt log. cosec. App. Dist. C log. Tab. IX. I 2d Part Q's corr. 0's whole corr. 1.6828 0' 48" 9.9992 2.6857 9.8825 0.1552 5 log. Tab. IX. 2.6475 > 2d Part (I 's corr. 7' "24" O whole corr. +34' 18" log. N.* Tab. XL 0.764 log. sin. Lat 35 30' N. +9.764 log. Tab. EL 0.528 2.7226 +8' 48" +8' 0" 45 4 45 * This log. may also be found from Table XII. by the rule in the note on p. 8. LUNAR DISTANCES. To find the Error of the Chronometer. 45 4' 45" 46 3 17 P.L. 0.3433 Diff. P. logs. +5 log. Tab. IX. 3.5456 log. Tab. IX. 3.8889 20 True distance Distance N. A. at XVIII> Difference Approximate interval Add Approx. Gr. time Corr. Tab. X. True Gr. time Gr. time by Chronom. Chronom. and lunar differ only and therefore the chronometer may be considered as going well. This example, worked by Bowditch's First Method, gives the true distance 45 & 44", differing from the above 59", in consequence of the omission by Bowditch of the small corrections. This difference would produce an error of 2 m * 10 s - in the Greenwich time, and consequently the longitude in this case deduced by Bowditch's method would be in error 32'.5 ; that is, more than half a degree. EXAMPLE II. In Lat. 55 20' S., Long. 120 25' W., by account, on August 29th, 1855, about 9 h - 40 ra< P. M., the Greenwich chronometer showing 5 h - 35 m - 46' .2 and from previous rate supposed slow 5 m> 12'- ; the following distance and altitudes are found, being the mean of six observations corrected for index errors. Observed distance of Fo- malhaut and C 's farthest limb 46 30' 23" ; observed alt. _C_ 6 26' 10" ; observed alt. Fomalhaut52 34' 40"; barometer 31 inches; thermometer 20 ; height of the eye above the sea 18 feet. What is the error of the chronometer according to these observations? h. m. a. Chronometer 5 35 46.2 (Slow) -H 5 12 Greenw. date Aug. 29 d - 17 40 58.2 Obs'd Alt. .1 Dip Tab. I. d 's aug. semid. ([^ App. Alt. d's Red. R. Tab. IV. Barom. Tab. IV. A. Therm. Tab. IV. B. d'sRed. R. CsRed.P. O I 6 26 10 49 +16 28 6 38 29 4-16 4-32 8 36 60 20 51 44 Preparation of the Data. fc Dip #'s App Alt. #'s Red. R. Tab. IV. Barom. Tab. IV. A. Therm. Tab. IV. B. #'s Red. R. #'5 Par. #' Red. P.j-R. 11 1 H 16 26.3 -f-2.0 (TsPar.N.A. Aug. Tab. III. d'sRed.P. 66 if* -1-8.3 16 28.3 60 20.1 o / // 52 34 40 4 9 52 30 31 Obs'd distance ;fc C 's aug. semid. App. Dist. <[ 1 46 30 23 1628 46 13 55 Id 4- 2 4- 5 1 20 Tao CORRECTION OF LUNAR DISTANCES. Computation of the True Distance. A. log. A. Tab. V. 0.0274 log. 'sRed.P.&R.Tab.IX.3.4919 log. sin. d 's App. Alt 9.0632 log. cot. App. Dist 9.9813 c. log. C. Tab. V. 9.9999 logo's Red. P.& R. TabJX. 1 .9031 log. sin. >f;'s App. Alt. 9.8995 log. cot. App. Dist. 9.9813 C log. Tab. IX. 1.7838 i 1st Part 5|C's dorr. 1' 1" D. log. D. Tab. V. 0.0267 log. #'s Red. P. & R. 1.9031 log. sin. d 's App. Alt 9.0632 log. cosec. App. Dist. 0.1414 App. Dist. 46 13 1st corr. 51 2c? corr. Tab. VI. Contraction of d 's ) Semid. Tab. VII. 5 ' dorr, for romnrfssion -4- 55 32 22 17 14 C log. Tab. IX. < 1st Part C 's corr. B. log. B. Tab. V. log. d'sKed.P.&R. log. sin. ^s App. Alt. log. cosec. App. Dist. < log. Tab. IX. 1 2d Part <[ 's corr. jc's corr. 5JC's whole corr. ' -> ^ 1.1344 +0' 14" -M)' 47" H-1.143 True Distance 45 22 32 To find the Error of the Chronometer. True Distance Dist.N.A.atXV> Difference Approx. interval Add Approx. Gr. time Corr. Tab. X. True Gr. time 45 22' 32" 43 51 59 P.L. log. Tab. IX. log. Tab. IX. 0.2527 Diff. P. Logs. 3.7350 1 30 33 2^" 42 111 ' I** 15 3.9877 17 42 1 +1 17 42 2 Gr. time by chronom. 17 40 58 Chron. and lunar differ I 4 and, the distances having been observed with care, the chronometer has probably changed its rate. A second observation confirming this, we must, from repeated lunars, determine a new rate, which may be used until an opportunity occurs of rating at a fixed place whose longitude is tolerably well known. This example, worked by Bowditch's Second Method, gives the true distance 45 2V 31", which is in error I 7 1", and would produce in the longitude deduced from it in this case an error of about 28'. * This value of log. N. is formed from Tab. XII. by the rule in the note on page 8 of this Appea- dix: tbus = latitude, e = eccentricity of the meridian, log e 3 = 7.81602, A TT = augmentation of the horizontal parallax for the latitude cj>. TABLE IV. Mean Reduced Refraction for Lunars^ computed by the formula - cos h sin h ' * Tables I., II., and IX., which are not peculiar to my method, are inserted to save a reference to other works for them ; so that the computer requires, in connection with this volume, only a table of logarithmic sines and tangents. These three tables have, however, been recomputed, as stated in the u Explanation." 13 EXPLANATION where h = the apparent altitude, r = mean refraction, barometer 30 inches, Fahrenheit's thermometer 50, r' = mean reduced refraction for lunars. The refractions employed are BESSEL'S, and were taken from his table (Astro* nomische Untersuchungen, Vol. I. p. 200), which gives directly K =z r tan h. TABLES IV. A. AND IV. B. Corrections of the Mean Refraction for the Height of the Barometer and Thermometer, deduced also from BessePs table above cited. These tables serve for correcting either r or r', according as the one or the other is taken as the argument. TABLE V. Logs, of A, B, C, and D, for computing the First Correction of the Lunar Distance, computed by the formulas sin A p _ ^sin^g-Aff) n __ ' sin 2 h ' where h = moon's apparent altitude, H = sun's, planet's, or star's apparent altitude (denoted in the tables by O ' or ;fc's App. Alt.), A h = difference of ' s Semidiameter. Lati- }>'s Horizontal Height of the Dip of the Horizon. Af^JBI ent Altitude 14' 15' 16' 17' tude ofOb- serva- Parallax. Eye. of J). 30" 0" 30" 0" 30" 0" tion. 53' 57' 61' Feet. If n n /< n n o n I g 00 0.1 0.1 0.1 0.1 0.2 0.2 0.0 0.0 0.0 1 59 2 0.6 0.6 0.7 0.7 0.8 0.8 2 0.0 0.0 0.0 2 1 23 4 1.0 1.1 1.2 1.3 1.4 1.5 4 0.1 0.1 0.1 3 1 42 6 1.5 1.6 1.7 1.9 2.0 2.1 6 0.1 0.1 0.1 4 1 58 8 2.0 2.1 2.3 2.4 2.6 2.7 8 0.2 0.2 0.2 5 2 11 10 2.4 2.6 2.8 3.0 3.2 3.4 10 0.3 0.3 0.4 6 2 24 12 2.9 3.1 3.3 3.6 3.8 4.0 12 0.5 0.5 0.5 7 2 36 14 3.4 3.6 3.9 4.1 4.4 4.7 14 0.6 0.7 0.7 8 246 16 3.8 4.1 4.4 4.7 5.0 5.3 16 0.8 0.9 0.9 9 2 56 18 4.3 4.6 4.9 5.2 5.6 5.9 18 1.0 1.1 1.1 10 306 20 4.7 5.1 5.4 5.8 6.1 6.5 20 1.2 1.3 1.4 11 3 15 22 5.2 5.5 5.9 6.3 6.7 7.1 22 1.5 1.6 1.7 12 3 24 24 5.6 6.0 6.4 6.8 7.3 7.7 24 1.7 1.9 2.0 13 3 32 26 6.0 6.5 6.9 7.4 7.8 8.3 26 2.0 2.2 2.3 14 3 40 28 6.5 6.9 7.4 7.9 8.4 8.9 28 2.3 2.5 2.6 15 3 48 30 6.9 7.3 7.9 8.4 8.9 9.5 30 2.6 2.8 3.0 16 3 55 32 7.3 7.8 8.3 8.9 9.4 10.0 32 2.9 3.1 3.4 17 4 02 34 7.7 8.2 8.8 9.4 10.0 10.6 34 3.3 3.5 3.8 18 09 36 8.1 8.6 92 9.8 10.5 11.1 36 3.6 3.9 4.1 19 16 38 8.4 9.0 97 10.3 10.9 11.6 38 4.0 4.3 4.6 20 23 40 8.8 9.4 10.1 10.7 11.4 12.1 40 4.3 4.6 5.0 21 29 42 9.2 9.8 10.5 11.2 11.9 12.6 42 4.7 5.0 5.4 22 36 44 9.5 10.2 10.9 11.6 12.3 13.1 44 5.0 5.4 5.8 23 42 46 9.8 10.5 11.3 12.0 12.8 13.6 46 5.4 5.8 6.2 24 48 48 10.2 10.9 11.6 12.4 13.2 14.0 48 5.8 6.2 6.6 25 4 54 50 10.5 11.2 12.0 12.8 13.6 14.4 Ufr 6.1 6.6 7.1 26 5 00 52 10.8 11.5 12.3 13.1 14.0 14.9 52 6.5 7.0 7.5 27 5 06 54 11.1 11.8 12.7 13.5 14.4 15.3 54 6.8 7.4 7.9 28 5 11 56 11.3 12.1 13.0 13.8 14.7 15.6 56 7.2 7.7 8.3 29 5 17 58 11.6 12.4 13.3 141 15.1 16.0 58 7.5 8.1 8.6 30 5 22 60 11.8 12.7 i3.5 14.4 15.4 16.3 60 7.8 8.4 9.0 35 5 48 62 12.1 12.9 13.8 14.7 15.7 16.6 62 8.1 8.8 .9.4 ; 40 6 12 64 12.3 13.2 14.1 15.0 16.0 16.9 64 8.4 9.1 9.7 45 6 34 66 12.5 13.4 14.3 15.2 16.2 17.2 66 8.7 9.4 10.0 50 6 56 68 12.7 13.6 14.5 15.5 16.5 17.5 68 9.0 9.7 10.3 55 7 16 70 12.9 13.8 14.7 15.7 16.7 17.7 70 9.2 9.9 10.6 60 7 35 72 13.0 13.9 14.9 15.9 16.9 17.9 72 9.5 10.2 10.9 65 7 54 74 13.1 14.1 15.0 16.0 17.1 18.1 74 9.7 10.4 11.1 70 8 12 76 13.3 14.2 15.2 16.2 17.2 18.3 76 9.8 10.6 11.3 75 8 29 78 13.4 14.3 15.3 16.3 17.4 18.4 78 10.0 10.8 11.5 80 846 80 13.5 14.4 15.4 16.4 17.5 18.6 80 10.1 10.9 11.7 85 9 02 82 13.5 14.5 15.5 16.5 17.6 18.7 82 10.3 11.0 11.8 90 9 18 84 136 14.6 15.6 16.6 17.6 18.7 84 10.3 11.1 11.9 95 9 33 86 13.6 14.6 15.6 16.6 17.7 18.8 86 10.4 11.2 12.0 100 9 48 88 13.7 14.6 15.6 16.7 17.7 18.8 88 10.4 11.2 12.0 90 13.7 14.6 15.6 16.7 17.7 18.8 90 10.5 11.3 12.0 19 TABLE IV. Mean Reduced Refraction for Lunars. Barometer 30 inches. Fahrenheit's Thermometer fiCR Apparent Altitude. Reduced Refraction. Biff, to '. Apparent Altitude. Reduced Refraction. Apparent Altitude. Reduced Refraction. Apparent Altitude. Reduced Refraction. O 1 5 i H 9 54.2 (/ .6 O 1 10 i n 5 24.1 o / 15 i // 3 41.7 27 2 7.S 5 9 46.3 .5 5 5 21.6 10 3 39.4 27 30 2 5.7 10 9 38.6 .5 10 5 19.2 20 3 37.1 28 2 3.7 15 9 31.0 .5 15 5 16.8 30 3 34.9 28 30 2 1.7 20 9 23.7 .4 20 5 14.4 40 3 32.7 29 59.8 25 9 16.5 1.4 25 5 12.1 50 3 30.6 29 30 58.0 5 30 9 9.5 1.4 10 30 5 9.8 16 3 28.5 30 56.2 35 9 2.7 1.3 35 5 7.5 10 3 26.5 30 30 54.5 40 8 56.0 1.3 40 5 5.3 20 3 24.5 31 52.8 45 8 49.5 1.3 45 5 3.1 30 3 22.6 31 30 51.2 50 8 43.1 1.2 50 5 0.9 40 3 20.7 32 1 49.7 55 8 36.9 1.2 55 4 58.8 50 3 18.8 32 30 1 48.2 6 8 309 1.2 11 4 56.7 17 3 16.9 33 1 46.7 5 8 24.9 1.2 5 4 54.6 10 3 15.1 33 30 1 45.3 10 8 19.1 1.1 10 4 52.5 20 3 13.4 34 1 44.0 15 8 13.4 1.1 15 4 50.5 30 3 11.6 34 30 1 42.7 20 8 7.8 1.1 20 4 48.5 40 3 9.9 35 1 41.4 25 8 2.4 1.1 25 4 46.6 50 3 8.2 35 30 1 40.2 6 30 7 57.0 1.0 11 30 4 44.6 18 3 6.6 36 1 39.0 35 7 51.8 1.0 35 4 42.7 10 3 5.0 36 30 1 37.8 40 7 46.7 1.0 40 4 40.8 20 3 3.4 37 36.7 45 7 41.7 1.0 45 4 38.9 30 3 1.8 37 30 35.6 50 7 36.7 1.0 50 4 37.1 40 3 0.3 38 34.5 55 7 31.9 0.9 55 4 35.3 5C 2 58.8 38 30 33.5 7 7 27.2 0.9 12 4 33.5 19 2 57.3 39 32.5 5 7 22.6 0.9 5 4 31.7 10 2 55.9 39 30 31.5 10 7 18.0 0.9 10 4 30.0 20 2 54.4 40 30.6 15 7 13.6 0.9 15 4 28.3 30 2 53.0 40 30 29.6 20 7 9.2 0.9 20 4 26.6 40 2 51.6 41 28.7 25 7 4.9 0.8 25 4 24.9 50 2 50.3 41 30 27.8 7 30 7 0.8 0.8 12 30 4 23.2 20 2 49.0 42 27.0 35 6 56.6 0.8 35 4 21.6 10 2 47.6 42 30 26.2 40 6 52.6 0.8 40 4 20.0 20 2 46.4 43 25.4 45 6 48.6 0.8 45 4 18.4 30 2 45.1 43 30 24.6 50 6 44.8 0.8 50 4 16.8 40 2 43.8 44 23.8 55 6 40.9 0.7 55 4 15.2 50 2 42.6 44 30 23.1 8 6 37.2 0.7 13 4 13.7 21 2 41.4 45 22.4 5 6 33.5 0.7 5 4 12.2 10 2 40.2 46 21.0 10 6 29.9 0.7 10 4 10.7 20 2 39.0 47 19.6 15 6 26.3 0.7 15 4 9.2 30 2 37.9 48 18.4 20 6 22.8 0.7 20 4 7.7 40 2 36.7 49 17.2 25 6 19.4 0.7 25 4 6.3 50 2 35.6 50 16.0 8 30 6 16.0 0.7 13 30 4 4.8 22 2 34.5 51 15.0 * 35 6 12.7 0.6 35 4 3.4 10 2 33.4 52 13.9 40 6 9.5 0.6 40 4 2.0 20 2 32.4 53 13.0 45 6 6.3 0.6 45 4 0.6 30 2 31.3 54 12.0 50 6 3.1 0.6 50 3 59.3 40 2 30.3 55 11.1 55 6 0.0 0.6 55 3 57.9 50 2 29.2 56 10.3 9 5 57.0 0.6 14 3 56.6 23 2 28.2 57 9.5 5 5 54.0 0.6 5 3 55.3 20 2 26.3 58 8.7 10 5 51.1 0.6 10 3 54.0 40 2 24.4 59 8.0 15 5 48.2 0.6 15 3 52.7 24 2 22.5 60 7.3 20 5 45.3 0.6 20 3 51.4 20 2 20.7 62 6.0 25 5 42.5 0.5 25 3 50.1 40 2 18.9 64 4.9 9 30 5 39.8 0.5 14 30 3 48.9 25 2 17.2 66 3.8 35 5 37.0 0.5 35 3 47.6 20 2 15.5 68 2.9 40 5 34.4 0.5 40 3 46.4 40 2 13.9 70 2.0 45 5 31.7 0.5 45 3 45.2 26 2 12.3 73 1.0 50 5 29.2 0.5 50 3 44.0 20 2 10.8 76 0.1 55 5 26.6 0.5 55 3 42.8 40 2 9.3 80 59.2 10 5 24.1 15 3 41.7 27 2 7.8 90 58.3 20 TABLE IV. A. Correction of the Mean Refraction for the Height of the Barometer. Barometer. MEAN REFRACTION. Barometer. 0' 1' 2' 3' 4' 5' 6' V 8' 9' 1O Subtract. 3('i 34 30 6 3tt o 3fi i 30 6' 30 30' ,!, 34 30^ t Add. 27.50 48 a 51 2 5 7 10 12 15 17 20 23 25 28 30 33 35 38 40 43 45 27.55 2 9 7 10 12 15 17 20 22 25 27 80 32 35 37 40 42 45 47 50 27.60 2 5 7 10 12 14 17 19 22 24 27 29 31 34 36 39 41 44 46 49 27.65 2 5 7 9 12 14 It) 19 21 24 26 28 31 33 '36 38 40 43 45 48 27.70 2 5 7 9 11 14 16 18 21 23 25 28 30 32 35 .37 39 42 44 47 27.75 2 4 7 9 11 13 16 18 20 2.3 25 27 29 32 34 36 39 41 43 46 27.80 2 4 7 9 11 13 15 18 20 22 24 27 29 31 33 35 ,38 40 42 45 27.85 2 4 6 9 11 13 15 17 19 22 24 26 28 30,32 35 .37 39 41 44 27.90 2 4 6 8 10 13 15 17 19 21 23 25 27 3032 34 36 38 40 43 27.95 2 4 6 8 10 12 14 16 18 21 23 25 27 29 31 33 35 -37 39 42 28.00 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 ,38 41 28.05 2 4 6 8 10 12 14 16 18 20 22 24 25 27 29 31 33 35 37 39 28.10 2 4 6 8 9 11 13 15 17 19 21 23 25 27 29 31 33 34 36 38 28.15 Q 2 4 6 7 9 11 13 15 17 19 20 22 24 26 28 30 32 34 36 37 28.20 2 4 5 7 9 11 13 14 16 18 20 22 24 25 27 29 31 33 35 36 28.25 2 3 5 7 9 10 12 14 16 18 19 21 23 25 26 28 30 32 34. 35 28.30 2 3 5 7 8 10 12 14 15 17 19 21 22 24 26 27 29 31 33 34 28.35 2 3 5 7 8 10 12 13 15 17 18 20 22 23 25 27 28 30 32 33 28.40 2 3 5 6 8 10 11 13 14 16 18 19 21 23 24 26 27 2 1 J 31 32 28.45 2 3 5 G 8 9 11 12 14 16 17 19 20 22 23 25 27 28 30 31 28.50 1 3 4 6 7 9 10 12 14 15 17 18 20 21 23 24 26 27 29 30 31.50 28.55 1 3 4 6 7 9 10 12 13 15 16 17 19 20 22 23 25 26 28 29 31.45 28.60 1 3 4 6 7 8 10 11 13 14 15 17 18 20 21 23 24 25 27 28 31.40 28.65 1 3 4 5 7 8 9 11 12 14 15 16 18 19 20 22 23 25 26 27 31.35 28.70 1 3 4 5 6 8 9 10 12 13 14 16 17 18 20 21 22 24 25 26 31.30 28.75 1 2 4 5 6 7 9 10 11 13 14 15 16 18 19 20 21 23 24 25 31.25 28.80 1 2 4 5 6 7 8 10 11 12 13 14 16 17 18 19 21 22 23 24 31.20 2885 1 2 3 5 6 7 8 9 10 12 13 14 15 16 17 19 20 21 22 23 31.15 28.90 1 2 3 4 5 7 8 9 10 11 12 13 14 16 17 18 19 20 21 22 31.10 28.95 1 2 3 4 5 6 7 8 9 11 12 13 14 15 16 17 18 19 20 21 31.05 29.00 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 31.00 29.05 1 2 3 4 5 8 7 8 9 10 11 11 12 13 14 15 16 17 18 19 30.95 29.10 1 2 3 4 4 5 6 7 8 9 10 11 12 13 14 15 15 16 17 18 30.90 29.15 1 2 3 3 4 5 6 7 8 9 9 10 11 12 13 14 15 15 16 17 30.85 29.20 1 2 2 3 4 5 6 6 7 8 9 10 10 11 12 13 14 15 15 16 30.80 29.25 2 3 4 4 5 6 7 8 8 9 10 11 11 12 13 14 14 15 30.75 29.30 2 3 3 4 5 6 6 7 8 8 9 10 11 11 12 13 13 14 30.70 29.35 2 3 3 4 5 5 6 7 7 8 9 9 10 10 11 12 13 13 30.65 29.40 2 2 3 4 4 5 5 6 7 7 8 8 9 10 10 11 12 12 30.60 29.45 2 2 3 3 4 4 5 6 6 7 7 8 8 9 9 10 11 11 30.55 29.50 2 2 3 3 4 5 5 6 6 7 7 8 8 9 9 10 10 30.50 29.55 2 2 3 3 4 4 5 5 5 6 6 7 7 8 8 9 9 30.45 29.60 2 2 2 3 3 4 4 4 5 5 6 6 6 7 7 8 8 30.40 29.65 1 2 2 2 3 3 4 4 4 5 5 5 6 6 6 7 7 30.35 29.70 1 1 2 2 2 3 3 3 4 4 4 5 5 5 5 6 6 30.30 29.75 1 1 1 2 2 2 3 3 3 3 4 4 4 4 5 5 5 30.25 29.80 1 1 1 1 2 2 2 2 2 3 3 3 3 3 4 4 4 30.20 29.85 1 1 1 1 1 1 2 2 2 2 2 2 2 3 3 3 3 30.15 29.90 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 30.10 29.95 . 1 1 1 1 1 1 1 1 1 1 1 30.05 30.00 00 30.00 Subtract. 30' 30 & 30 30' 30 30 6' 3fl 1 30' 6' 30' i 36 o' Add. 0' 1' 2' 3' 4' 5' 6' 7' 8' 9' 10' MEAN REFRACTION. 21 TABLE IV. B. Correction of the Mean Refraction for the Height of the Thermometer. Thermora. MEAN REFRACTION. Thermom. O' 1' 2' 3' 4' 5' 6' 7' 8' 9' 10 Add. 6 36 30' I 36 6' 30' t 3ft 6 30 6' 3# 6' 3# 6' sfi & 3ft 6' Add. Q 10 4 8 12 16 20 24 28 33 37 41 46 50 55 60 65 70 75 80 85 90 10 8 4 8 12 15 19 23 27 31 36 40 44 48 53 58 62 67 72 77 : 82 87 8 6 4 7 11 15 19 22 26 30 34 38 42 47 51 55 60 64 69 74J79 84 6 i t A 4 7 11 14 18 22 25 29 33 37 41 45 49 53 57 62 66 71 76 80 4 2 3 T 10 14 17 21 24 28 31 35 39 43 47 51 55 59 64 68 72 77 2 3 7 10 13 16 20 23 27 30 34 37 41 45 49 53 57 61 65 69 74 2 a 6 9 12 16 19 22 25 29 32 36 39 43 47 50 54 58 62 66 70 2 4 3 6 9 12 15 18 21 24 28 31 34 37 41 44 48 52 55 59 63 67 4 6 3 6 8 11 14 17 20 23 26 29 32 36 39 42 46 49 53 56 60 64 6 8 3 5 8 11 14 16 19 22 25 28 31 34 37 40 43 47 50 54 57 61 8 10 3 5 8 10 13 15 18 21 24 26 29 32 35 38 41 44 48 51 54 58 10 11 2 5 7 10 13 15 18 20 23 26 28 31 34 37 40 43 46 49 53 56 11 12 2 5 7 10 12 15 17 20 22 25 28 30 33 36 39 42 45 48 51 54 12 13 2 5 7 9 12 14 17 19 22 24 27 30 32 35 38 41 44 47 50 53 13 14 2 5 7 9 11 14 16 19 21 24 26 29 31 34 37 40 42 45 48 51 14 15 2 4 7 9 11 13 16 18 20 23 25 28 30 33 36 38 41 44 47 50 15 16 2 4 6 9 11 13 15 18 20 22 25 27 29 32 35 37 40 43 45 48 16 17 2 4 6 8 10 13 15 17 19 21 24 26 29 31 33 36 39 41 44 47 17 18 2 4 6 8 10 12 14 16 19 21 23 25 28 30 32 35 37 40 43 45 18 19 2 4 6 8 10 12 14 16 18 20 22 24 27 29 31 34 36 39 41 44 19 20 2 4 6 8 9 11 13 15 17 19 22 24 26 28 30 33 35 37 40 42 20 21 2 4 5 7 9 11 13 15 17 19 21 23 25 27 29 31 34 36 38 41 21 22 2 3 5 7 9 11 12 14 16 18 20 22 24 26 28 30 32 35 37 39 22 23 2 3 5 7 8 10 12 14 15 17 19 21 23 25 27 29 31 33 36 38 23 24 2 3 5 6 8 10 11 13 15 17 18 20 22 24 26 28 30 32 34 36 24 25 2 3 5 6 8 9 11 13 14 16 18 19 21 23 25 27 29 31 33 35 25 26 3 4 6 7 9 11 12 14 15 17 19 20 22 24 26 28 29 31 33 26 27 3 4 6 7 9 10 12 13 15 16 18 19 21 23 25 26 38 30 32 27 28 3 4 5 7 8 10 11 12 14 15 17 19 20 22 23 25 27 29 30 28 29 3 4 5 6 8 9 11 12 13 15 16 18 19 21 22 24 26 27 29 29 30 2 4 5 6 7 9 10 11 13 14 15 17 18 20 21 23 24 26 28 30 31 2 3 5 6 7 8 9 11 12 13 15 16 17 19 20 22 23 25 26 31 32 2 3 4 6 7 8 9 10 11 13 14 15 16 18 19 20 22 23 25 32 33 2 3 4 5 6 7 8 10 11 12 13 14 15 17 18 19 21 22 23 33 34 2 3 4 5 6 7 8 9 10 11 12 13 14 16 17 18 19 21 22 34 35 2 3 4 5 6 6 7 8 9 10 11 13 14 15 16 17 IS 19 20 35 36 2 3 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 36 37 2 2 3 4 5 6 6 7 8 9 10 11 12 13 14 15 16 17 18 37 38 2 3 4 4 5 6 7 7 8 9 10 11 12 13 13 14 15 16 38 39 2 3 3 4 5 5 6 7 8 8 9 10 11 11 12 13 14 15 39 40 2 2 3 4 4 5 6 6 7 fi 8 9 10 10 11 12 13 13 40 41 2 2 3 3 4 4 5 6 6 7 8 9 9 10 11 11 12 41 42 1 2 2 3 3 4 4 5 5 e 7 7 8 8 9 9 10 11 42 43 1 2 2 3 3 3 4 4 5 je 6 6 ** 7 8 8 9 9 43 44 1 1 2 2 3 3 3 4 4 4 5 5 6 6 7 7 8 8 44 45 1 1 1 1 2 2 2 3 3 3 4 4 4 5 5 6 6 6 7 45 46 1 1 1 1 2 2 2 2 2 3 3 4 4 4 4 5 5 5 46 47 1 1 1 1 1 I 2 2 2 9 2 3 3 3 3 4 4 4 47 48 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 3 48 49 1 1 1 1 1 1 1 1 1 1 1 1 49 50 50 Add. \ 30' II 3tf 3# 1 30' i 30 6 30 6' 30 6' 30" 4 3ft 6' 30 * Add. Thermo rn. 0' 1' 2' 3' 4' 5' 6' 7' 8' 9' 10' Tficrrnoni. MEAN REFRACTION. TABLE IV. B. Correction of the Mean Refraction for the Height of the Thermometer. Thermom. MEAN REFRACTION. Thermom. O' 1' 2' 3' 4' 5' 6' V 8' 9' 10' Subtract. 4 36 \ 30' 4 3ft 6 3ft 4 3ft 6 3 ft 6' 3ft 4 30' 6' 3ft 6' 30 6' subtract. o 50 / 50 51 1 i i i 1 1 1 i 1 i 1 i 51 52 1 1 1 1 1 i i i 2 2 2 2 2 2 2 3 52 53 1 1 1 1 1 2 2 2 2 2 2 3 3 3 3 4 4 53 54 1 1 1 2 2 2 2 3 3 3 3 4 4 4 5 5 5 54 55 1 1 1 2 2 2 3 3 3 4 4 4 5 5 5 6 6 6 55 56 1 1 2 2 2 3 3 4 4 4 5 5 G 6 G 7 7 8 56 57 1 2 2 2 3 3 4 4 5 5 G 6 6 7 8 8 8 9 57 58 1 2 2 3 3 4 4 5 5 6 6 7 7 8 9 9 10 10 58 59 1 1 2 2 3 3 4 4 5 5 6 6 7 8 8 9 10 10 11 12 59 60 1 1 2 2 3 3 4 5 5 6 7 7 8 9 9 10 11 11 12 13 60 61 1 1 2 3 3 4 4 5 6 7 7 8 9 9 10 11 12 12 13 14 61 62 1 1 2 3 3 4 5 6 6 7 8 9 9 10 11 12 13 14 15 15 62 63 1 1 2 3 4 5 5 6 7 8 8 9 10 11 12 13 14 15 16 17 63 64 1 2 2 3 4 5 6 7 7 8 9 10 11 12 13 14 15 16 17 18 64 65 1 2 3 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 65 66 1 2 3 4 5 6 6 7 8 9 10 11 12 14 15 16 17 18 19 20 66 67 1 2 3 4 5 6 7 8 9 10 11 12 13 14 16 17 18 19 20 22 67 68 1 2 3 4 5 G 7 8 9 11 11 13 14 15 1G 18 19 20 22 23 68 69 1 2 3 4 5 7 8 9 10 11 12 13 15 16 17 19 20 21 23 24 69 70 1 2 3 5 6 7 8 9 10 12 12 14 16 17 18 20 21 22 24 25 70 71 1 2 4 5 6 7 8 10 11 12 13 15 16 18 19 20 22 23 25 27 71 72 1 2 4 5 6 8 9 10 11 13 14 16 17 18 20 21 23 25 26 28 72 73 1 3 4 5 7 8 9 11 12 13 14 16 18 19 21 22 24 26 27 29 73 74 1 3 4 5 7 8 10 11 12 14 15 17 18 20 22 23 25 27 28 30 74 75 1 3 4 6 7 8 10 11 13 14 16 18 19 21 22 24 26 28 29 31 75 76 1 3 4 6 7 9 10 12 13 15 16 18 20 22 23 25 27 29 31 32 76 77 1 3 5 6 8 9 11 12 14 16 17 19 21 22 24 26 28 30 32 34 77 78 2 3 5 6 8 9 11 13 14 16 18 20 21 23 25 27 29 31 33 35 78 79 2 3 5 6 8 10 11 13 15 17 18 110 22 24 26 28 30 32 34 36 79 80 2 3 5 7 8 10 12 14 15 17 19 21 23 25 27 29 31 83 35 37 80 81 2 3 5 7 9 10 12 14 16 18 20 21 24 26 28 30 32 34 36 38 81 82 2 5 7 9 11 13 14 16 18 20 22 24 26 28 31 33 35 37 40 82 83 2 5 7 9 11 13 15 17 19 21 23 25 27 29 31 34 36 38 41 83 84 2 6 8 9 11 13 15 17 19 21 23 26 28 30 32 35 37 39 42 84 85 2 6 8 10 12 14 16 18 20 22 2426 29 31 33 36 38 40 43 85 86 2 6 8 10 12 14 16 18 20 23 25 27 29 32 34 37 39 42 44 86 87 2 6 8 10 12 14 17 19 21 23 25 28 30 32 85 38 40 43 45 87 . 88 2 4 6 8 10 13 15 17 19 21 24 26 28 31 33 36 38 41 44 46 88 89 2 4 6 9 11 13 15 17 20 22 24 27; 29 32 34 37 39 42 45 48 89 90 2 4 7 9 11 13 16 18 20 23 25 27 30 32 35 38 40 43 46 49 90 91 2 4 7 9 11 14 16 18 21 23 25 28|31 33 3G 39 41 44 47 50 91 92 2 5 7 9 11 14 16 19 21 24 26 29 31 34 37 39 42 45 48 51 92 93 2 5 7 9 12 14 17 19 22 24 27 29 32 35 37 40 43 46 49 52 93 94 2 5 7 10 12 14 17 19 22 25 27 3033 35 38 41 44 47 50 53 94 95 2 5 7 10 12 15 17 20 22 25 28 30 ! 33 3G 39 42 45 48 51 54 95 96 2 5 7 10 12 15 18 20 23 26 28 31 34 37 40 43 46 49 52 55 96 97 3 5 8 10 13 15 18 21 23 26 29 32 35 38 41 44 47 50 53 56 97 98 3 5 8 10 13 16 18 21 24 27 29 32 35 38 41 44 48 51 54 58 98 99 3 5 8 11 13 16 19 21 24 27 30 33 36 39 42 45 49 52 55 59 99 100 3 5 8 11 13 16 19 22 25 28 31 3437 40 43 46 50 53 56 60 100 Subtract. 4 3* 1 36 3ft 3ft 4 30 4 30 & 3ft 4 3ft 30 6' 3ft 6 Subtract. JT hcrrnom. 1' 2' 3' 4' 5' 6' 7' ' 9' 10' Thflrmnm MEAN REFRACTION. x nemioin > 23 TABLE V. LOG. A. Logs A, B, C, and D, for Computing the First Correction of the lunar L/istanco. App. Alt REDUCED PARALLAX AND REFRACTION O.F D. Alt. of J> 41' 42' 43' 44' 45' 46' 47' 4S' 49' 5O' 51 5*2' S3' 54' 5ff 5 0' .0288 0295 0301 0308 0315 0321 0328 0335 0341 0348 0355 0361 036& 2 .0286 0293 0299 0306 0313 0319 0326 0333 0339 0346 0352 0359 0366 4 .0284 0291 0297 0304 0311 0317 0324 0330 0337 0344 0350 0357 0363 ! 1 6 .0282 0289 0296 0302 0309 0315 0322 0328 0335 0341 0348 0354 0361 8 .0281 0287 0294 0300 0307 0313 0320 0326 0333 0339 0346 0352 0359 5 10 .0279 0285 0292 0298 0305 0311 0318 0324 0331 0337 0344 0350 0356 12 .0277 0284 0290 0296 0303 0309 0316 0322 0329 0335 0341 0348 0354 14 .0275 0282 0288 0295 0301 0307 0314 0320 0327 0333 0339 0346 0352 16 .0274 0280 0286 0293 0299 0306 0312 0318 0325 0331 0337 0344 0350 18 .0272 0278 0285 0291 0297 0304 0310 0316 0323 0329 0335 0341 0348 5 20 .0270 0277 0283 0289 0296 0302 0308 0314 0321 0327 0333 0339 0346 22 .0269 0275 0281 0288 0294 0300 0306 0313 0319 0325 0331 0337 0344 24 .0267 0273 0280 0286 0292 0298 0304 0311 0317 0323 0329 0335 0341 26 .0265 0272 0278 0284 0290 0296 0303 0309 0315 0321. 0327 0333 0339 0346 { 28 .0264 0270 0276 0282 0289 0295 0301 0307 0313 0319 0325 0331 0337 0344 5 30 .0262 0268 0275 0281 0287 0293 0299 0305 0311 0317 0323 0329 0335 0342 32 .0261 0267 0273 0279 0285 0291 0297 0303 0309 0315 0321 0327 0334 0340 34 .0259 0265 0271 0277 0283 0290 0296 0302 0308 0314 0320 0326 0332 0338 36 .0258 0264 j 0270 0276 0282 0288 0294 0300 0306 0312 0318 0324 0330 'J336 38 0262 0268 0274 0280 0286 0292 0298 0304 0310 0316 0322 0328 033-1 1 5 40 0261 0267 0273 0279 0285 0290 0296 0302 0308 0314 0320 03S6 0?,32 1 42 0259 0265 0271 0277 0283 0289 0295 0301 0306 0312 0318 Of,24 0330 44 0258! 0264 0270 0275 0281 0287 0293 0299 0305 0311 0316 0322 0328 46 0256 0262 0268 0274 0280 0286 0291 0297 0303 0309 0315 0320 0326 48 0255 0261 0267 0272 0278 0284 0290 0296 0301 0307 0313 0319 0324 5 50 0253 0259 0265 0271 0277 0282 0288 0294 0300 0305 0311 0317 0323 ' 52 0252 0258 0264 0269 0275 0281 0287 0292 0298 0304 0309 0315 0321 54 0251 0256 0262 0268 0274 0279 0280 0291 0296 0302 0308 0313 0319 56 0249 0255 0261 0266 0272 0278 0283 0289 0295 0300 0306 0312 0817 58 0248 0254 0259 0265 0271 0276 0282 0287 0293 0299 0304 0310 0316 6 0247 0252 0258 0263 0269 0275 0280 0286 0291 0297 0303 0308 0314 2 0245 0251 0256 0262 0268 0273 0279 0284 0290 0295 0301 0307 0312 4 0244 0249 0255 0261 0266 0272 0277 0283 0288 0294 0299 0305 0310 6 0243 0248 0254 0259 0265 0270 0276 0281 0287 0292 0298 0303 0309 8 0241 0247 0252 0258 0263 026'J 0274 0280 0285 0291 0296 0302 0307 , 6 10 0240 0246 0251 0256 0262 0267 0273 0278 0284 0289 0295 0300 0306 12 0239 0244 0250 0255 0261 0266 0271 0277 0282 0288 0293 0299 0304 14 0237 0243 0248 0254 0259 0265 0270 0275 0281 .0286 0292 0297 0302 16 0236 0242 0247 0252 0258 0263 0269 0274 0279 0285 0290 0295 0301 18 0235 0240 0246 0251 0257 0262 0267 0273 0278 0283 0289 0294 0299 6 20 0234 0239 0245 0250 0255 0261 0266 0271 0276 0282 0287 0292 0298 22 0233 0238 0243 0249 0254 0259 0264 0270 0275 0280 0286 0291 0296 24 0231 0237 0242 0247 0253 0258 0263 0268 0274 0279 0284 0289 0295 26 0236 0241 0246 0251 0257 0262 0267 0272 0277 0283 0288 0293 28 0234 0240 0245 0250 0255 0260 0266 0271 0276 0281 0286 0292 0297 6 30 0233 0238 0244 0249 0254 0259 0264 0270 0275 0280 0285 0290 0295 32 0232 0237 0242 0248 0253 0258 0263 0268 0273 0278 0284 0289 0294 34 0231 0236 0241 0246 0251 0257 0262 0267 0272 0277 0282 0287 0292 36 0230 0235 0240 0245 0250 0255 0260 0266 0271 0276 0281 0286 0291 38 0229 0234 0239 0244 0249 0254 0259 0264 0269 0274 0279 0284 0290 6 40 0227 0232 0238 0243 0248 0253 0258 0263 0268 0273 0278 0283 0288 42 0220 0231 0236 0241 0246 0252 0257 0262 0267 0272 0277 0282 0287 44 02?.5 0230 0235 0240 0245 0250 0255 0260 0265 0270 0275 0280 0285 46 0224 0229 0234 0239 0244 0249 0254 0259 0264 0269 0274 0279 0284 48 0223 0228 0233 0238 0243 0248 0253 0258 0263 0268 0273 0278 0283 6 50 0222 0227 0232 0237 0242 0247 0252 0257 0262 0266 0271 0276 0281 52 0221 0226 0231 0236 0241 0246 0250 0255 0260 0265 0270 0275 0280 54 0220 0225 0230 0235 0239 0244 0249 0254 0259 0264 0269 0274 0279 56 0219 0224 0229 0233 0238 C243 0248 0253 0258 0263 0267 0272 0277 58 0218 0223 0227 0232 0237 0242 0247 0252 0257 0261 0266 0271 0276 7 0217" 0722 0226 0231 0236 0241 0246 0251 0255 0260 0265 0270 0275 24 TABLE V. LOG. A. Logs. A, B, C, and D, for Lunars. A A?f REDUCED PARALLAX AND REFRACTION OF d. ot }>. 44' 45' 46' 47' 4' 49' 50' 51' 52' 53' 54' 55' 56' 57' 7 0' .0222 0226 0231 0236 0241 0246 0251 0255 0260 0265 0270 0275 3 .0220 0225 0230 0234 0239 0244 0249 0254 0258 0263 0268 0273 6 .0218 0223 0228 0233 0238 0242 0247 0252 0257 0261 0266 0271 9 .0217 0222 0226 0231 0236 0241 0245 0250 0255 0260 0264 0269 12 .0215 0220 0225 0230 0234 0239 0244 0248 0253 0258 0262 0267 7 15 .0214 0219 0223 0228 0233 0237 0242 0247 0251 0256 0261 0265 18 .0213 0217 0222 0226 0231 0236 0240 0245 0250 0254 0259 0263 21 .0211 0216 0220 0225 0230 0234 0239 0243 0248 0253 0257 0262 24 .0210 0214 0219 0223 0228 0233 0237 0242 0246 0251 0255 0260 27 .0208 0213 0217 0222 0227 0231 0236 0240 0245 0249 0254 0258 7 30 .0207 0211 0216 0220 0225 0230 0234 0239 0243 0248 0252 0257 33 .0206 0210 0215 0219 0224 0228 0232 0237 0241 0246 0250 0255 36 .0204 0209 0213 0218 0222 0227 0231 0235 0240 0244 0249 0253 39 .0203 0207 0212 0216 0221 0225 0229 0234 0238 0243 0247 0252 42 .0202 0206 0210 0215 0219 0224 0228 0232 0237 0241 0246 0250 7 45 .0200 0205 0209 0213 0218 0222 0227 0231 0235 0240 0244 0248 48 .0199 0203 0208 0212 0216 0221 0225 0229 0234 0238 0242 0247 51 .0198 0202 0206 0211 0215 0219 0224 0228 0232 0237 0241 0245 0249 54 .0136 0201 0205 0209 0214 0218 0222 0227 0231 0235 0239 0244 0248 57 .0195 0200 0204 0208 0212 0217 0221 0225 0229 0234 0238 0242 0246 8 .0194 0198 0203 0207 0211 0215 0219 0224 0228 0232 0236 0241 0245 3 .0193 0197 0201 0206 0210 0214 0218 0222 0227 0231 0235 0239 0243 6 .0192 0196 0200 0204 0208 0213 0217 0221 0225 0229 0233 0238 0242 9 0195 0199 0203 0207 0211 0215 0220 0224 0228 0232 0236 0240 12 0193 0198 0202 0206 0210 0214 0218 0222 0227 0231 0235 0239 8 15 0192 0196 0201 0205 0209 0213 0217 0221 0225 0229 0233 0237 18 0191 0195 0199 0203 0207 0212 0217 0220 0224 0228 0232 0236 21 0190 0194 0198 0202 0206 0210 0214 0218 0222 0226 0231 0235 24 0189 0193 0197 0201 0205 0209 0213 0217 0221 0225 0229 0233 27 0188 0192 0196 0200 0204 0208 0212 0216 0220 0224 0228 0232 8 30 0187 0191 0195 0199 0203 0207 0211 0215 0219 0223 0226 0230 33 0186 0190 0193 0197 0201 0205 0209 0213 0217 0221 0225 0229 36 0184 0188 0192 0196 0200 0204 0208 0212 0216 0220 0224 0228 39 0183 OJ87 0191 0195 0199 0203 0207 0211 0215 0219 0223 0226 42 0182 0186 0190 0194 0198 0202 0206 0210 0214 0217 0221 0225 8 45 0181 0185 0189 0193 0197 0201 0205 0208 0212 0216 0220 0224 48 0180 0184 0188 0192 0196 0200 0203 0207 0211 0215 0219 0223 51 0179 0183 0187 0191 0195 0198 0202 0206 0210 0214 0218 0221 54 0178 0182 0186 0190 0193 0197. 0201 0205 0209 0212 0216 0220 57 0177 0181 0185 0189 0192 0196 0200 0204 0208 0211 0215 0219 9 0176 0180 0184 0188 0191 0195 0199 0203 0206 0210 0214 0218 3 0175 0179 0183 0186 0190 0194 0198 0201 0205 0209 0213 0216 6 0174 0178 0182 0185 0189 0193 0197 0200 0204 0208 0211 0215 9 0173 0177 0181 0184 0188 0192 0196 0199 0203 0207 0210 0214 12 0172 0176 0180 0183 0187 0191 0194 0198 0202 0206 0209 0213 9 15 0171 0175 0179 0182 0186 0190 0193 0197 0201 0204 0208 0212 18 0170 0174 0178 0181 0185 0189 0192 0196 0200 0203 0207 0211 21 0170 0173 0177 0180 0184 0188 0191 0195 0199 0202 0206 0209 24 0172 0176 0179 0183 0187 0190 0194 0198 0201 0205 0208 27 0171 0175 0179 0182 0186 0189 0193 0196 0200 0204 U207 9 30 0170 0174 0178 0181 0185 0188 0192 0195 0199 0203 0206 33 0170 0173 0177 0180 0184 0187 0191 0194 0198 0201 0205 36 0169 0172 0176 0179 0183 0186 0190 0193 0197 0200 0204 39 0168 0171 0175 0178 0182 0185 0189 0192 0196 0199 0203 42 0167 0170 0174 0177 0181 0184 0188 0191 0195 0198 0202 9 45 0166 0169 0173 0176 0180 0183 0187 0190 0194 0197 0201 48 0165 0169 0172 0176 0179 0182 0186 0189 0193 0196 0200 0203 51 0164 0168 0171 0175 0178 0182 0185 0188 0192 0195 0199 0202 54 0163 0167 0170 0174 0177 0181 0184 0187 0191 0194 0198 0201 57 0163 0166 0169 0173 0176 0180 0183 0186 0190 0193 0197 0200 10 0162 0165 0169 0172 0175 0179 0182 0186 0189 0192 0196 0199 25 TABLE V. LOG. A, Logs. A, B, C, and D, for Lunars. ir of >' REDUCED PARALLAX AND REFRACTION OF > 46' 49" 48' 49' 50' 51' 52' 53' 54' 55' 56' 57' 58' 100' 0162 0165 0169 0172 0175 0179 0182 0186 0189 0192 0196 0199 5 0160 0164 0167 0171 0174 0177 0181 0184 0187 0191 0194 0197 10 0159 0162 0166 0169 0172 0176 0179 0182 0186 0189 0192 0196 15 0158 0161 0164 0168 0171 0174 0178 0181 0184 0187 0191 0194 20 0156 0160 0163 0166 0170 0173 0176 0179 0183 0186 0189 0192 25 0155 0158 0162 0165 0168 0171 0175 0178 0181 0184 0188 0191 1030 .0154 0157 0160 0164 0167 0170 0173 0177 0180 0183 0186 0189 35 .0153 0156 0159 0162 0166 0169 0172 0175 0178 0181 0185 0188 40 .0151 0155 0158 0161 0164 0167 0171 0174 0177 0180 0183 0186 45 .0150 0153 0157 0160 0163 0166 0169 0172 0175 0179 0182 0185 50 .0149 0152 0155 0158 0162 0165 0168 0171 0174 0177 0180 0183 55 .0148 0151 0154 0157 0160 0163 0167 0170 0173 0176 0179 0182 11 .0147 0150 0153 0156 0159 0162 0165 0168 0171 0174 0177 0181 5 .0146 0149 0152 0155 0158 0161 0164 0167 0170 0173 0176 0179 10 0148 0151 0154 0157 0160 0163 0166 0169 0172 0175 0178 15 0146 0149 0152 0155 0158 0161 0164 0167 0170 0173 0176 20 0145 0148 0151 0154 0157 0160 0163 0166 0169 0172 0175 25 0144 0147 0150 0153 0156 0159 0162 0165 0168 0171 0174 1130 0143 0146 0149 0152 0155 0158 0161 0164 0167 0170 0172 35 0142 0145 0148 0151 0154 0157 0160 0162 0165 0168 0171 40 0141 0144 0147 0150 0153 0156 0158 0161 0164 0167 0170 45 0140 0143 0146 0149 0151 0154 0157 0160 0163 0166 0169 50 0139 0142 0145 0148 0150 0153 0156 0159 0162 0165 0167 55 0138 0141 0144 0146 0149 0152 0155 0158 0161 0163 0166 12 0137 0140 0143 0145 0148 0151 0154 0157 0159 0162 0165 5 0136 0139 0142 0144 0147 0150 0153 0156 0158 0161 0164 10 0135 0138 0141 0143 0146 0149 0152 0154 0157 0160 0163 15 0134 0137 0140 0142 0145 0148 0151 0153 0156 0159 0162 20 0133 0136 0139 0141 0144 0147 0150 0152 0155 0158 0160 25 0132 0135 0138 0140 0143 0146 0148 0151 0154 0157 0159 1230 0131 0134 0137 0139 0142 0145 0147 0150 0153 0155 0158 35 0130 0133 0136 0138 0141 0144 0146 0149 0152 0154 0157 40 0129 0132 0135 0137 0140 0143 0145 0148 0151 0153 0156 45 0129 0131 0134 0136 0139 0142 0144 0147 0150 0152 0155 0158 50 0128 0130 0133 0136 0138 0141 0143 0146 0149 0151 0154 0156 55 0127 0129 0132 0135 0137 0140 0142 0145 0148 0150 0153 0155 13 0126 0129 0131 0134 0136 0139 0141 0144 0147 0149 0152 0154 5 0125 0128 0130 0133 0135 0138 0141 0143 0146i0148 0151 0153 10 0124 0127 0129 0132 0135 0137 0140 0142 0145 0147 0150 0152 15; 0123 0126 0129 0131 0134 0136 0139 0141 0144 0146 0149 0151 20 0123 0125 0128 0130 0133 0135 0138 0140 0143 0145 0148 0150 25 0122 0124 0127 0129 0132 0134 0137 0139 0142 0144 0147 0149 1330 0121 0124 0126 0129 0131 0133 0136 0138 0141 0143 0146 0148 35 0120 0123 0125 0128 0130 0133 0135 0138 0140 0142 0145 0147 40 0120 0122 0124 0127 0129 0132 0134 0137 0139 0142 0144 0146 45 0121 0124 0126 0128 0131 0133 0136 0138 0141 0143 0145 50 0120 0123 0125 0128 0130 0132 0135 0137 0140 0142 0145 55 0120 0122 0124 0127 0129 0132 0134 0136 0139 0141 0144 14 0119 0121 0124 0126 0128 0131 0133 0136 0138 0140 0143 5 0118 0121 0123 0125 0128 0130 0132 0135 0137 0139 0142 10 0117 0120 0122 0124 0127 0129 0132 0134 0136 0139 0141 15 0117 0119 0121 0124 0126 0128 0131 0133 0135 0138 0140 20 0116 0118 0121 0123 0125 0128 0130 0132 0135 0187 0139 25 0115 0118 0120 0122 0124 0127 0129 0131 0134 0136 0138 1430 0114 0117 0119 0121 0124 0126 0128 0131 0133 0135 0137 35 0114 0116 0118 0121 0123 0125 0128 0130 0132 0134 0137 40 0113 0115 0118 0120 0122 0124 0127 0129 0131 0134 0136 45 0112 0115 0117 0119 0121 0124 0126 0128 0130 0133 0135 50 0112 0114 0116 0118 0121 0123 0125 0127 0130 0132 0134 55 0111 0113 0116 0118 0120 0122 0124 0127 0129 0131 0133 15 0110 0113 0115 0117 0119 0121 0124 0126 0128 0130 0133 26 TABLE V. LOG. A. Logs. A, B, C, and D, for Lunars. APP REDUCED PARALLAX AND REFRACTION OF ]>. Alt. of )>. 18 19 5O' 51' 52' 53 54' 55' 56' 57' 58' 59' 15 .0110 0113 0115 0117 0119 0121 0124 0126 0128 0130 0133 10 .0109 0111 0113 0116 0118 0120 0122 0124 0127 0129 0131 20 .0108 0110 0112 0114 0116 0119 0121 0123 0125 0127 0129 I 30 .0107 0109 0111 0113 0115 0117 0119 0121 0124 0126 0128 , 40 .0105 0107 0110 0112 0114 0116 0118 0120 0122 0124 0126 50 .0104 0106 0108 0110 0112 0115 0117 0119 0121 0123 0125 16 .0103 0105 0107 0109 0111 0113 0115 0117 0119 0121 0124 10 .0102 0104 0106 0108 0110 0112 0114 0116 0118 0120 0122 20 .0101 0103 0105 0107 0109 0111 0113 0115 0117 0119 0121 30 .0100 0102 0103 0105 0107 0109 0111 0113 0115 0117 0119 40 .0098 0100 0102 0104 0106 0108 0110 0112 0114 0116 0118 50 .0097 0099 0101 0103 0105 0107 0109 0111 0113 0115 0117 17 .0096 0098 0100 0102 0104 0106 0108 0110 0112 0114 0116 10 .0095 0097 0099 0101 0103 0105 0107 0109 0110 0112 0114 20 .0094 0096 0098 0100 0102 0104 0106 0107 0109 0111 0113 30 0095 0097 0099 0101 0103 0104 0106 0108 0110 0112 40 0094 0096 0098 0100 0101 0103 0105 0107 0109 0111 50 0093 0095 0097 0099 0100 0102 0104 0106 0108 0109 18 0092 0094 0096 0098 0099 0101 0103 0105 0107 0108 10 0091 0093 0095 0097 0098 0100 0102 0104 0105 0107 0109 20 0090 0092 0094 0096 0097 0099 0101 0103 0104 0106 0108 30 0089 0091 0093 0095 0096 0098 0100 0102 0103 0105 0107 40 0088 0090 0092 0094 0095 0097 0099 0101 0102 0104 0106 50 0088 0089 0091 0093 0094 0096 0098 0099 0101 0103 0105 19 0087 0088 0090 0092 0093 0095 0097 0098 0100 0102 0104 10 0086 0087 0089 0091 0092 0094 0096 0098 0099 0101 0103 20 0085 0087 0088 0090 0092 0093 0095 0097 0098 0100 0102 30 0084 0086 0087 0089 0091 0092 0094 0096 0097 0099 0101 40 0083 0085 0087 0088 0090 0091 0093 0095 0096 0098 0100 50 0082 0084 0086 0087 0089 0090 0092 0094 0095 0097 0099 20 0082 0083 0085 0086 0088 0090 0091 0093 0094 0096 0098 10 0081 0082 0084 0086 0087 0089 0090 0092 0093 0095 0097 20 0080 0082 0083 0085 0086 0088 0089 0091 0093 0094 0096 30 0079 0081 0082 0084 0086 0087 0089 0090 0092 0093 0095 40 0079 0080 0082 0083 0085 0086 0088 0089 0091 0092 0094 50 0078 0079 0081 0082 0084 0085 0087 0088 0090 009JL 0093 21 0077 0079 0080 0082 0083 0085 0086 0088 0089 0091 0092 10 0076 0078 0079 0081 0082 0084 0085 0087 0088 0090 0091 20 0076 0077 0079 0980 0082 0083 0085 0086 0087 0089 0090 30 0075 0076 0078 0079 0081 0082 0084 0085 0087 0088 0090 40 0074 0076 0077 0079 0080 0082 0083 0084 0086 0087 0089 50 0074 0075 0076 0078 0079 0081 0082 0084 0085 0086 0088 22 0073 0074 0076 0077 0079 0080 0081 0083 0084 0086 0087 10 0072 0074 0075 0076 0078 0079 0081 0082 0083 0085 0086 20 0072 0073 0074 0076 0077 0079 0080 0081 0083 0084 0086 30 0071 0072 0074 0075 0076 0078 0079 0081 0082 0083 0085 40 0070 0072 0073 0074 0076 0077 0079 0080 0081 0083 0084 50 0070 0071 0072 0074 0075 0076 0078 0079 0081 0082 0083 23 0069 0070 0072 0073 0074 0076 0077 0078 0080 0081 0082 10 0068 0070 0071 0072 0074 0075 0076 0078 0079 0080 0082 20 0068 0069 0070 0072 0073 0074 0076 0077 0078 0080 0081 30 0067 0069 0070 0071 0072 0074 0075 0076 0078 0079 0080 40 0067 0068 0069 0071 0072 0073 0074 0076 0077 0078 0080 50 0066 0067 0069 0070 0071 0073 0074 0075 0076 0078 0079 24 0067 0068 0069 0071 0072 0073 0074 0076 0077 0078 10 0066 0067 0069 0070 0071 0073 0074 0075 0076 0078 20 0066 0067 0068 0069 0071 0072 0073 0074 0076 0077 30 0065 0066 0068 0069 0070 0071 0072 0074 0075 0076 40 0065 0066 0067 0068 0069 0071 0072 0073 0074 0076 50 0064 0065 0066 0068 0069 0070 0071 0072 0074 0075 25 0063 0065 0066 0067 0068 0069 0071 0072 0073 0074 TABLE V. LOG. A, Logs. A, B, C, and D, for Lunars. ll? REDUCED PARALLAX AND REFRACTION OF > All. of D- 50' 51' 52' 53' 54' 55' 56' 57' 58' 59' oo 25 0' 0063 0065 0066 0067 0068 0069 0071 0072 0073 0074 20 0062 0064 0065 0066 0067 0068 0069 0071 0072 0073 40 0061 0062 0064 0065 0066 0067 0068 0069 0071 0072 26 0060 0061 0063 0064 0065 0066 0067 0068 0069 0071 20 0059 0060 0062 0063 0064 0065 0066 0067 0068 0069 40 0058 0059 0061 0062 0063 0064 0065 0066 0067 0068 27 0057 0058 0060 0061 0062 0063 0064 0065 0066 0067 20 0056 0057 0059 0060 0061 0062 0063 0064 0065 0066 40 0055 0057 0058 0059 0060 0061 0062 0063 0064 0065 28 0055 0056 0057 0058 0059 0060 0061 0062 0063 0064 20 0054 0055 0056 0057 0058 0059 0060 0061 0062 0063 40 0053 0054 0055 0056 0057 0058 0059 0060 0061 0062 29 0052 0053 0054 0055 0056 0057 0058 0059 0060 0061 20 0051 0052 0053 0054 0055 0056 0057 0058 0059 0060 40 0050 0051 0052 0053 0054 0055 0056 0057 0058 0059 30 0050 0051 0051 0052 0053 0054 0055 0056 0057 0058 20 0049 0050 0051 0052 0052 0053 0054 0055 0056 0057 40 0048 0049 0050 0051 0052 0053 0053 0054 0055 0056 31 0047 0018 0049 0050 0051 0052 0053 0053 0054 0055 20 0047 0047 0048 0049 0050 0051 0052 0053 0054 0054 0055 40 0046 0047 0048 0048 0049 0050 0051 0052 0053 0054 0054 32 0045 0046 0047 0048 0048 0049 0050 0051 0052 0053 0054 20 0044 0045 0046 0047 0048 0049 0049 0050 0051 0052 0053 40 0044 0045 ! 0045 0046 0047 0048 0049 0049 0050 0051 0052 33 .0043 0044 0045 0045 0046 0047 0048 0049 0049 0050 0051 20 .0042 0043 ; 0044 0045 0046 0046 0047 0048 0049 0050 0050 40 .0042 0043 0043 0044 0045 0046 0046 0047 0048 0049 0050 34 .0041 0042 i 0043 0043 0044 0045 0046 0046 0047 0048 0049 20 .0040 0041 j 0042 0043 0043 0044 0045 0046 0047 0047 0048 40 .0040 '0041 0041 0042 0043 0044 0044 0045 0046 0047 0047 35 .0039 0040 0041 0041 0042 0043 0044 0044 0045 0046 0047 20 .0039 1 0039 0040 0041 0042 0042 0043 0044 0044 0045 0046 40 .0038 0039 ! 0039 0040 0041 0042 0042 0043 0044 0044 0045 36 .0037 0038 | 0039 0040 0040 0041 0042 0042 0043 0044 0044 20 .0037 0038, 0038 0039 0040 0040 0041 0042 0042 0043 0044 40 .0036 0037 0038 0038 0039 0040 0040 0041 0042 0042 0043 37 .0036 0036 0037 0038 0038 0039 0040 0040 0041 0042 0042 20 .0035 0036 i 0037 0037 0038 0039 0039 0040 0040 0041 0042 40 .0035 0035 0036 0037 0037 0038 0039 0039 0040 0040 0041 38 .0034 0035 0035 0036 0037 0037 0038 0039 0039 0040 0040 20 .0034 0034 0035 0036 0036 0037 0037 0038 0039 0039 0040 40 .0033 0034 0034 0035 0036 0036 0037 0037 0038 0039 0039 39 0033 0034 0034 0035 0036 0036 0037 0037 0038 0039 20 0033 0033 0034 0035 0035 0036 0036 0037 0037 0038 40 0032 0033 0033 0034 0035 0035 0036 0036 0037 0037 40 0032 0032 0033 0033 0034 0035 0035 0036 0036 0037 20 0031 0032 0032 0033 0034 0034 0035 0035 04ft6 0036 I 40 0031 0031 0032 0032 0033 0034) 0034 0035 0035 0036 41 0030 0031 0031 0032 0033 0033 0034 0034 0035 0035 20 0030 0030 0031 0031 0032 0033 0033 0034 0031 0035 40 0029 0030 0030 0031 0032 0032 0033 0033 0034 0034 42 0029 0029 0030 0031 0031 0032 0032 0033 0033 0034 20 0029 0029 0030 0030 0031 0031 0032 0032 0033 0033 40 0028 0029 0029 0030 0030 0031 0031 0032 0032 0033 43 0028 0028 0029 0029 0030 0030 0031 0031 0032 0032 20 0027 0028 0028 0029 0029 0030 0030 0031 0031 0032 40 0027 0027 0028 0028 0029 0029 0030 0030 0031 0031 44 0026 0027 0027 0028 0028 0029 0029 0030 0030 0031 20 0026 0026 0027 0027 0028 0028 0029 0029 0030 0030 40 0026 0026 0026 0027 0027 0028 0028 0029 0029 0030 45 0025 0026 0026 0027 0027 0027 0028 0028 0029 0029 TABLE V. LOG. A. Logs. A, B, C, and D, for Lunars. l?t p - REDUCED PARALLAX AND REFRACTION OF 3>. j of > 51 52 53' 54' 55' 56' 57' 58' 59' 6O' ! 45 0' .0025 0026 0026 0027 0027 0027 0028 0028 0029 0029 30 .0025 0025 0025 0026 0026 0027 0027 0028 0028 0028 46 .0024 0024 0025 0025 0026 0026 0027 0027 0027 0028 30 .0023 0024 0024 0025 0025 0026 0026 0026 0027 0027 47 .0023 0023 0024 0024 0025 0025 0025 0026 0026 0026 30 .0022 0023 0023 0024 0024 0024 0025 0025 0025 0026 48 .0022 0022 0023 0023 0023 0024 0024 0024 0025 0025 30 .0021 0022 0022 0022 0023 0023 0024 0024 0024 0025 49 .0021 0021 0022 0022 0022 0023 0023 0023 0024 0024 30 .0020 0021 0021 0021 0022 0022 0022 0023 0023 0023 50 .0020 0020 0020 0021 0021 0022 0022 0022 0023 0023 30 .0019 0020 0020 0020 0021 0021 0021 0022 0022 0022 51 .0019 0019 0020 0020 0020 0020 0021 0021 0021 0022 30 .0018 0019 0019 0019 0020 0020 0020 0021 0021 0021 52 .0018 0018 0019 0019 0019 0019 0020 0020 0020 0021 30 .0018 0018 0018 0018 0019 0019 0019 0020 0020 0020 53 .0017 0017 0018 0018 0018 0018 0019 0019 0019 0020 30 .0017 0017 0017 0017 0018 0018 0018 0019 0019 0019 54 .0016 0016 0017 0017 0017 0018 0018 0018 0018 0019 30 .0016 0016 0016 0017 0017 0017 0017 0018 0018 0018 55 .0015 0016 0016 0016 0016 0017 0017 0017 0017 0018 30 .0015 0015 0015 0016 0016 0016 0016 0017 0017 0017 56 .0015 0015 0015 0015 0016 0016 0016 0016 0017 0017 30 .0014 0014 0015 0015 0015 0015 0016 0016 0016 0016 57 .0014 0014 0014 0015 0015 0015 0015 0015 0016 0016 30 .0014 0014 0014 0014 0014 0015 0015 0015 0015 0015 58 .0013 0013 0014 0014 0014 0014 0014 0015 0015 0015 30 .0013 0013 0013 0013 0014 0014 0014 0014 0014 0015 59 .0012 0013 0013 0013 0013 0013 0014 0014 0014 0014 30 .0012 0012 0012 0013 0013 0013 0013 0013 0014 0014 60 .0012 0012 0012 0012 0013 0013 0013 0013 0013 0013 61 .0011 0011 0011 0012 0012 0012 0012 0012 0012 0013 62 .0011 0011 0011 0011 0011 0011 0011 0012 0012 0012 63 .0010 0010 0010 0010 0011 0011 0011 0011 0011 0011 64 .0009 0010 0010 0010 0010 0010 0010 OOlc 0010 0011 65 .0009 0009 0009 0009 0009 0009 0010 0010 0010 0010 66 .0008 0008 0009 0009 0009 0009 0009 0009 0009 0009 67 .0008 0008 0008 0008 0008 0008 0008 0009 0009 0009 68 .0007 0007 0008 0008 0008 0008 0008 0008 0008 0008 69 .0007 0007 0007 0007 0007 0007 0007 0008 0008 0008 70 .0007 0007 0007 0007 0007 0007 0007 0007 0007 0007 71 .0006 0006 0006 0006 0006 0006 0007 0007 0007 0007 72 .0006 0006 0006 0006 0006 0006 0006 0008 0006 0006 73 .0005 0005 0006 0006 0006 0006 0006 0006 0006 0006 74 .0005 0005 0005 0005 0005 0005 0005 0005 0005 0006 75 .0005 0005 0005 0005 0005 0005 0005 0005 0005 0005 76 .0004 0005 0005 0005 0005 0005 0005 0005 0005 0005 77 .0004 0004 0004 0004 0004 0004 0004 0004 0004 0004 78 .0004 0004 0004 0004 0004 0004 0004 0004 0004 0004 79 .0004 0004 0004 0004 0004 0004 0004 0004 0004 0004 80 .0004 0004 0004 0004 0004 0004 0004 0004 0004 0004 81 .0003 0003 0003 0003 0003 0003 0003 0003 0003 0003 82 .0003 0003 0003 0003 0003 0003 0003 0003 0003 0003 83 .0003 0003 0003 0003 0003 0003 0003 0003 0003 0003 84 .0003 0003 0003 0003 0003 0003 0003 0003 0003 0003 85 .0003 0003 0003 0003 0003 0003 0003 0003 0003 0003 1 I 86 .0003 0003 0003 0003 0003 0003 0003 0003 0003 0003 87 .0003 0003 0003 0003 0003 0003 0003 0003 0003 0003 1 88 0003 0003 0003 0003 0003 0003 0003 0003 0003 0003 89 .0003 0003 0003 0003 0003 0003 0003 0003 0003 0003 !)0 .0003 0003 0003 0003 0003 0003 0003 0003 0003 0003 TABLE V. LOG. B. Logs. A, B, C, and D, for Lunars. || App. Alt. nf REDUCED REFRACTION AND PARALLAX OF OR -)f. OI Oor*. O'O" O'iO" I'O" I'M" 2'0" r so" 8'0" I 1 80" 4/0" 4' 10" S'O" 5' SO" 5 0' 10 20 30 40 50 6 20 9.9970 40 9.9972 7 9.9976 9.9974 20 9.9977 9.9975 40 9.9981 9.9978 9.9976 8 9.9982 9.9979 9.9977 ' 20 9.9982 9.9980 9.9978 40 9.9983 9.9981 9.9979 9 9.9986 9.9984 9.9982 9.9980 20 9.9986 9.9985 9.9983 9.9981 40 9.9987 9.9985 9.9983 9.9982 10 9.9989 9.9988 9.9986 9.9984 9.9982 11 9.9992 9.9991 9.9989 9.9987 9.9986 9.9984 12 9.9993 9.9992 9.9990 9.9989 9.9987 9.9986 13 9.9995 9.9994 9.9992 9.9991 9.9990 9.9989 9.9987 14 9.9995 9.9994 9.9993 9.9992 9.9991 9.9990 15 9.9997 9.9996 9.9995 9.9994 9.9993 9.9992 9.9991 16 9.9997 9.9996 9.9995 9.9994 9.9993 9.9993 18 9.9990 9.9998 9.9997 9.9996 9.9995 9.9995 20 0.0000 9.9999 9.999S 9.9998 9.9997 9.9996 9.9996 25 0.0000 0.0000 9.9999 9.9999 9.9998 9.9998 30 00001 0.0001 0.0000 0.0000 0.0000 9.9999 50 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 90 0.0001 0.0002 0.0002 0.0002 LOG. C. App. AH. REDUCED REFRACTION AND PARALLAX OF Q OR #. of Oor*. O'O" 0' 30" I'O" I'M" I'D" I 1 10" S'O" 3' SO" 4/0" 4' 30" ' 0" 5' 10" 5 0' 20 40 6 20 9.9969 40 9.9970 7 9.9974 9.9972 8 9.9980 9.9978 9.9975 9 9.9984 9.9982 9.9980 9.9978 10 9.9988 9.9986 9.9984 9.9982 9.9981 11 9.9990 9.9989 9.9987 9.9986 9.9984 9.9982 12 9.9991 9.9990:9.9988 9.9987 9.9985 9.9984 13 9.9993 9.9992 9.9991 9.9989 9.998819.9987 9.9985 14 9.9994 9.9993 9.9991 9.9990 9.9989 9.9988 15 9.9995 9.9994 9.9993 9.9992 9.9991 9.9990 9.9989 16 99996 9.9995 9.9994 9.9993 9.9992 9.9990 17 9.9996 9.9995 9.9994 9.9993 9.9992 9.9991 i 18 9.9997 9.9996 9.9995 9.9994 9.9994 9.9993 20 9.9998 9.9998 9.9997 9.9996 9.9995 9.9994 9.9993 25 9.9999 9.9998 9.9998 9.9997 99996 9.9996 30 0.0000 9.9999 9.9999 9.9998 9.9998 9.9997 40 0.0000 9.9999 9.9999 99999 9.9999 , 50 0.0000 0.0000 0.0000 9.9999 9.9999 L o.jooo o.oooo o.oooo ; o.oooo TABLE V. LOG. B, Logs. A, B, C, and D, for Lunars. App. Alt. _^ REDUCED REFRACTION AND PARALLAX OF OR ^-. ot 6'0" 6' 10" 7'0" 1' SO" 8'0" 8' SO" 9' 0" 9' SO" 10' 0" 10' SO" 11' O 1 ' ll'IO" 5 0' 9.9951 9.9947 9.9944 9.9940 9.9937 9.9933 9.9929 9.9926 9.9922 9.9919 10 9.9953 9.9949 9.9946 '9.9942 9.9939 9.9935 9.9932 9.9928 9.9925 9.9921 20 30 9.9959 9.9954 9.9956 9.9951 9.9952 9.9948 9.9944 9.9949 9.9946 9.9941 9.9943 9.9937 9.9934 9.9939 9.9936 9.9931 9.9933 9.9927 9.9929 9.9924 40 9.9960 9.9957 9.9954 9.9951 9.9948 9.9944 9.9941 9.9938 9.9935 9.9932 50 9.9965 9.9962 9.9958 9.9955 9.9952 9.9949 9.9946 9.9943 9.9940 9.9937 6 9.9966 9.9963 9.9960 9.9957 9.9954 9.9951 9.9948 9.9945 9.9942 9.9939 20 9.9968 9.9965 9.9962 9.9959 9.9956 9.9954 9.9951 9.9948 9.9945 40 7 9.9969 9.9967 9.9971 9.9968 9.9964 9.9966 9.9961 9.9959 9.9963 9.9961 9.9956 9.9958 9.9953 9.9956 9.9951 9.9953 9.9948 I 20 9.9972 9.9970 9.9968 9.9965 9.9963 9.9960 9.9958 40 9.9974 9.9971 9.9969 9.9967 9.9965 9.9962 8 9.9975 9.9973 9.9971 9.9968 9.9966 9.9964 20 9.9976 9.9974 9.9972 9.9970 9.9968 40 9.9977 9.9975 9.9973 9.9971 9 9.9978 9.9976 9.9974 9.9972 20 9.9979 9.9977 9.9975 40 9.9980 9.9978 9.9976 10 9.9981 9.9979 9.9977 11 9.9983 9.9981 12 9.9985 13 14 15 16 18 20 25 30 50 90 LOG. C. App. Alt. REDUCED REFRACTION AND PARALLAX OF Q OR #. of or-)f 6'0" 6' 10" 7/0// 7' SO" 8'0" 8' SO" 9'0" 9' 10" 10' 0" 10' SO' ll'O' 11' SO" 5 0' 9.9949 9.9946 9.9942 9.9938 9.9935 9.9931 9.992-7 9.9924 9.9920 9.9916 20 9.9956 9.9953 9.9949 9.9946 9.9942 9.9939 9.9936 9.9932 9.9929 9.9925 9.9922 40 9.9962 9.9959 9.9955 9.9952 9.9949 9.9946 9.9943 9.9939 9.9936 9.9933 9.9930 6 9.9964 9.9961 9.9958 9.9955 9.9952 9.9949 9.9946 9.9943 9.9940 9.9937 20 9.9966 9.9963 9.9960 9.9957 9.9955 9.9952 9.9949 9.9946 9.9943 40 9.9968 9.9965 9.9962 9.9960 9.9957 9.9954 9.9951 9.9949 9.9946 7 9.9969 9.9967 9.9964 9.9962 9.9959 9.9956 9.9954 9.9951 8 9.9973 9.9971 9.9969 9.9966 9.9964 9.9962 9.9960 9 9.9976 9.9974 9.9972 9.9970 9.9968 10 9.9979 9.9977 9.9975 11 9.9981 9.9979 12 9.9983 13 14 15 16 17 18 20 25 30 40 50 90 31 TABLE V. LOG. D. Logs. A, B, C, and D, for Lunars. A?F REDUCED PARALLAX AND REFRACTION OF > Alt. of 2>. 41' 42' 43' 44' 45.' 46' 47' 48' 49' 5O' 51' 52' 53' 54' 55' 50' 0283 0290 0296 0303 0310 0316 0323 0329 0336 0343 0349 0356 0362 0369 3 0280 0287 0293 0300 0307 0313 0320 0326 0333 0339 0346 0352 0359 0365 6 0277 0284 0291 0297 0304 0310 0317 0323 0330 0336 0342 0349 0355 0362 9 0275 0281 0288 0294 0301 0307 0313 0320 0326 0333 0339 0345 0352 0358 12 0272 0279 0285 0291 0298 0304 0310 0317 0323 0330 0336 0342 0349 0355 5 15 0270 0276 0282 0289 0295 0301 0308 0314 0320 0326 0333 0339 0345 0351 18 0267 0273 0280 0286 0292 0298 0305 0311 0317 0323 0330 0336 0342 0348 21 0264 0271 0277 0283 0289 0296 0302 0308 0314 0320 0327 0333 0339 0345 24 0262 0268 0274 0281 0287 0293 0299 0305 0311 0317 0324 0330 0336 0342 27 0260 0266 0272 0278 0284 0290 0296 0302 0308 0314 0321 0327 0333 0339 530 0257 0263 0269 0275 0282 0288 0294 0300 0306 0312 0318 0324 0330 0336 33 0255 0261 0267 0273 0279 0285 0291 0297 0303 0309 0315 0321 0327 0333 36 0253 0259 0265 0271 0276 0282 0288 0294 0300 0306 0312 0318 0324 0330 39 0256 0262 0268 0274 0280 0286 0292 0298 0303 0309 0315 0321 0327 42 0254 0260 0266 0272 0277 0283 0289 0295 0301 0306 0312 0318 03*24 545 0252 0258 0263 0269 0275 0281 0287 0292 0298 0304 0310 0315 0321 48 0250 0255 0261 0267 0273 0278 0284 0290 0295 0301 0307 0313 0318 51 0247 0253 0259 0265 0270 0276 0282 0287 0293 0299 0304 0310 0316 54 0245 0251 0257 0262 0268 0274 0279 0285 0290 0296 0302 0307 0313 57 0243 0249 0254 0260 0266 0271 0277 0282 0288 0294 0299 0305 0310 6 0241 0247 0252 0258 0263 0269 0275 0280 0286 0291 0297 0302 0308 3 0239 0245 0250 0256 0261 0267 0272 0278 0283 0289 0294 0300 0305 6 0237 0243 0248 0254 0259 0265 0270 0275 0281 0286 0292 0297 0302 9 0235 0241 0246 0252 0257 0262 0268 0273 0279 0284 0289 0295 0300 12 0233 0239 0244 0249 0255 0260 0266 0271 0276 0282 0287 0292 0298 6 15 0231 0237 0242 0247 0253 0258 0263 0269 0274 0279 0285 0290 0295 18 0230 0235 0240 0245 0251 0256 0261 0267 0272 0277 0282 0288 0293 21 0228 0233 0238 0243 0249 0254 0259 0264 0270 0275 0280 0285 0290 24 0226 0231 0236 0242 0247 0252 0257 0262 0267 0273 0278 0283 0288 27 0229 0234 0240 0245 0250 0255 0260 0265 0271 0276 0281 0286 0291 630 0227 0233 0238 0243 0248 0253 0258 0263 0268 0274 0279 0284 0289 33 0226 0231 0236 0241 0246 0251 0256 0261 0266 0271 0276 0281 0287 36 0224 0229 0234 0239 0244 0249 0254 0259 0264 0269 0274 0279 0284 39 0222 0227 0232 0237 0242 0247 0252 0257 0262 0267 0272 0277 0282 42 0220 0225 0230 0235 0240 0245 0250 0255 0260 0265 0270 0275 0280 645 0219 0224 0229 0234 0239 0244 0248 0253 0258 0263 0268 0273 0278 48 0217 0222 0227 0232 0237 0242 0247 0251 0256! 0261 0266 0271 0276 51 0216 0220 0225 0230 0235 0240 0245 0250 0254 0259 0264 0269 0274 54 0214 0219 0224 0228 0233 0238 0243 0248; 0253 0257 0262 0267 1272 57 0212 0217 0222 0227 0232 0236 0241 0246 0251 0255 0260 0265 0270 7 0211 0216 0220 0225 0230 0235 0239 0244 ! 0249, 0254 0258 0263 0268 3 0209 0214 0219 0223 0228 0233 0238 0242 0247 0252 0256 0261 0266 6 0208 0212 0217 0222 0227 0231 0236 0241 0245 0250 0255 0259 0264 9 0211 0216 0220 0225 0230 0234 0239 0243 ! 0248 0253 0257 0262 12 0209 0214 0219 0223 0228 0232 0237 j 0242 0246 0251 0255 0260 7 15 0208 0212 0217 0222 0226 0231 0235 0240 0245 0249 0254 0258 18 0206 0211 0216 0220 0225 0229 0234 0238 0243 0247 0252 0256 21 0205 0209 0214 0219 0223 0228 0232 0237; 0241 0246 0250 0255 24 0204 0208 0213 0217 0222 0226 0230 0235 0239 0244 0248 0253 27 0202 0207 0211 0216 0220 0224 0229; 0233 0238 0242 0247 0251 730 0201 0205 0210 0214 0218 0223 0227 0232! 0236 0241 0245 0249 33 0199 0204 0208 0213 0217 0221 0226 0230 0234 0239 0243 0248 36 0198 0202 0207 0211 0215 0220 0224 0229 0233 0237 0242 0246 39 0197 0201 0205 0210 0214 0218 0223 0227 0231 0236 0240 0244 42 0195 0200 0204 0208 0213 0217 0221 0225 0230 0234 0238 0243 7 45 0194 0198 0203 0207 0211 0215 0220! 0224 0228 0232 0237 0241 48 0193 0197 0201 0205 0210 0214 0218 0222; 0227 0231 0235 0239 51 019 0196 0200 0204 0208 0213 0217 0221 0225 0229 0234 0238 54 0190 0194 0198 0203 0207 0211 0215 0219 0224 0228 0232 0236 57 0189 0193 0197 0201 0206 0210 0214 0218 0222 0226 0230 0235 * 0188 0192 0196 020C 0204 0208 0212 0217 0221 0225 0229 0233 32 TABLE V. LOG. D. Logs. A, B, C, and D, for Lunars. App. A 1* EEDUCED PARALLAX AND REFRACTION OF }>. Alt. of > 45' 46' 47' 48' 49' 50' 51' 52' 53' 54' 55' 56' 57' 58 8 D 0' .0192 0196 0200 0204 0208 0212 0217 0221 0225 0229 0233 0237 5 .0190 0194 0198 0202 0206 0210 0214 0218 0222 0227 0231 0235 10 .0188 0192 0196 0200 0204 0208 0212 0216 0220 0224 0228 0232 15 .0186 0190 0194 0198 0202 0206 0210 0214 0218 0222 0226 0230 20 .0184 0188 0192 0196 0200 0204 0207 0211 0215 0219 0223 0227 25 .0182 0186 0190 0194 0197 0201 0205 0209 0213 0217 0221 0225 8 30 .0180 0184 0188 0192 0195 0199 0203 0207 0211 0215 0219 0223 35 .0178 0182 0186 0190 0193 0197 0201 0205 0209 0213 0216 0220 40 .0176 0180 0184 0188 0191 0195 0199 0203 0207 0210 0214 0218 45 .0174 0178 0182 0186 0189 0193 0197 0201 0205 0208 0212 0216 50 .0173 0176 0180 0184 0188 0191 0195 0199 0202 0206 0210 0214 55 .0171 0175 0178 0182 0186 0189 0193 0197 0200 0204 0208 0212 9 .0169 0173 0177 0180 0184 0188 0191 0195 0198 0202 0206 0209 5 .0167 0171 0175 0178 0182 0186 0189 0193 0197 0200 0204 0207 10 .0166 0169 0173 0177 0180 0184 0187 0191 0195 0198 0202 0205 15 .0164 0168 0171 0175 0179 0182 0186 0189 0193 0196 0200 0203 20 .0163 016610170 0173 0177 0180 0184 0187 0191 0194 0198 0201 25 .0161 0165 0168 0172 0175 0179 0182 0186 0189 0193 0196 0199 9 30 0163 0166 0170 0173 0177 0180 0184 0187 0191 0194 0198 35 0161 0165 0168 0172 0175 0179 0182 0185 0189 0192 0196 - 40 0160 0163 0167 0170 0174 0177 0180 0184 0187 0191 0194 45 0158 0162 0165 0169 0172 0175 0179 0182 0185 0189 0192 0195 50 0157J 0160 0164 0167 0170 0174 0177 0180 0184 0187 0190 0194 55 0156 0159 0162 0165 0169 0172 0175 0179 0182 0185 0189 0192 10 0154 0157 0161 0164 0167 0171 0174 0177 0180 0184 0187 0190 5 0153 0156 0159 0162 0166 0169 0172 0175 0179 0182 0185 0188 10 0151 0155 0158 0161. 0164 0167 0171 0174 0177 0180 0183 0187 15 0150 0153 0156 0160 0163 0166 0169 0172 0175 0179 0182 0185 20 0149 0152 0155 0158 0161 0164 0168 0171 0174 0177 0180 0183 25 0147 0150 0154 0157 0160 0163 0166 0169 0172 0175 0179 0182 1030 0146 0149 0152 0155 0158 0162 0165 0168 0171 0174 0177 0180 35 0145 0148 0151 0154 0157 0160 0163 0166 0169 0172 0175 0179 40 . 0143 0147 0150 0153 0156 0159 0162 0165 0168 0171 0174 0177 45 0142 0145 0148 0151 0154 0157 0160 0163 0166 0169 0172 0175 50 0141 0144 0147 0150 0153 0156 0159 0162 0165 0168 0171 0174 55 0140 0143 0146 0149 0152 0155 0158 0161 0164 0167 0170 0172 11 0139 0142 0145 0147 0150 0153 0156 0159 0162 0165-1)168 0171 5 0137 0140 0143 0146 0149 0152 0155 0158 0161 0164 0167 0170 10 0139 0142 0145 0148 0151 0154 0157 0159 0162 0165 0168 15 0138 0141 0144 0147 0150 0152 0155 0158 0161 0164 0167 20 0137 0140 0143 0145 0148 0151 0154 0157 0160 0163 0165 25 0136 0139 0141 0144 0147 0150 0153 0156 0158 0161 0164 1130 0135 0137 0140 0143 0146 0149 0151 0154 0157 0160 0163 35 0133 0136 0139 0142 0145 0147 0150 0153 0156 0159 0161 40 0132 0135 0138 0141 0143 0146 0149 0152 i 0154 0157 0160 45 0131 0134 0137 0140 0142 0145 0148 0150 0153 0156 0159 50 0130 0133 0136 0138 0141 0144 0147 0149 0152 0155 0157 55 0129 0132 0135 0137 0140 0143 0145 0148 0151 0153 0156 12 0128 0131 0134 0136 0139 0142 0144 0147 0150 0152 0155 5 0127 0130 0132 0135 0138 0140 0143 0146 0148 ' 0151 0154 10 0126 0129 0131 0134 0137 0139 0142 0145J 0147 0150 0152 15 0125 0128 0130 0133 0136 0138 0141 0143 0146 0149 0151 20 0124 0127 0129 0132 0135 0137 0140 0142 0145 0147 0150 25 0123 0126 0128 0131 0133 0136 0139 0141 0144J 0146 0149 1230 0122 0125 0127 0130 0132 0135 0138 0140 0143 0145 0148 . 35 0121 0124 0126 0129 0131 0134 0136 0139 0141 0144 0147 40 0120 0123 0125 0128 0130 0133 0135 0138 0140 0143 0145 45 0119 0122 0124 0127 0129 0132 0134 0137 0139 0142 0144 0147 50 0118 0121 0123 0126 0128 0131 0133 0136 0138 0141 0143 0146 55 0118 0120 0123 0125 0127 0130 0132 0135 0137 0140 0142 0145 13 0117 0119 0122 0124 0126 0129 0131 0134 0136 0139 0141 0143 33 TABLE V. LOG. D. Logs. A, B, C, and D, for Lunars. l?t p ' REDUCED PARALLAX AND REFRACTION OF D. of 3>- 4T 48' 49' .*O 51' 52' 53' 54' 55' 56' 57' 58' 59' 13 0' .0117 0119 0122 0124 0126 0129 0131 0134 0136 0139 0141 0143 10 .0115 0117 0120 0122 0125 0127 0129 0132 0134 0137 0139 0141 20 .0113 0116 0118 0120 0123 0125 0127 0130 0132 0134 0137 0139 30 .0112 0114 0116 0119 0121 0123 0125 0128 0130 0132 0135 0137 40 0112 0114 0117 O119 0121 0124 0126 0128 0131 0133 0135 50 0111 0113 0115 0117 0120 0122 0124 0126 0129 0131 0133 14 0109 0111 0113 0116 0118 0120 0122 0125 0127 0129 0131 10 0107 0110 0112 0114 0116 0118 0121 0123 0125 0127 0129 20 0106 0108 0110 0112 0114 0117 0119 0121 0123 0125 0127 30 0104 0106 0109 0111 0113 0115 0117 0119 0121 0123 0126 40 0103 0105 0107 0109 0111 0113 0115 0118 0120 0122 0124 50 0101 0103 0106 0108 0110 0112 0114 0116 0118 0120 0122 15 0100 0102 0104 0106 0108 0110 0112 0114 0116 0118 0120 10 0099 0101 0103 0105 0107 0109 0111 0113 0115 0117 0119 20 0097 0099 0101 0103 0105 0107 0109 0111 0113 0115 0117 30 0096 0098 0100 0102 0104 0106 0108 0110 0112 0113 0115 40 0094 0096 0098 0100 0102 0104 0106 0108 0110 0112 0114 50 0093 0095 0097 0099 0101 0103 0105 0107 0108 0110 0112 16 0092 0094 0096 0098 0099 0101 0103 0105 0107 0109 0111 10 0091 0093 0094 0096 0098 0100 0102 0104 0106 0107 0109 20 0089 0091 0093 0095 0097 0099 0100 0102 0104 0106 0108 30 0088 0090 0092 0094 0096 0097 0099 0101 0103 0105 0106 40 0087 0089 0091 0092 0094 0096 0098 0100 0101 0103 0105 50 0086 0088 0089 0091 0093 0095 0096 0098 0100 0102 0104 17 0085 0087 0088 0090 0092 0093 0095 0097 0099 0100 0102 10 0084 0085 0087 0089 0091 0092 0094 0096 0097 0099 0101 20 0083 0084 0086 0088 0089 0091 0093 0094 0096 0098 0099 30 0083 0085 0086 0088 0090 0091 0093 0095 0096 0098 40 0082 0084 0085 0087 0089 0090 0092 0094 0095 0097 50 0081 0083 0084 0086 0087 0089 0091 0092 0094 0096 18 0080 0082 0083 0085 0086 0088 0090 0091 0093 0094 20 0078 0079 0081 0083 0084 0086 0087 0089 0090 0092 0093 40 0076 0077 0079 0080 0082 0083 0085 0087 0088 0090 0091 19 0074 0075 0077 0078 0080 0081 0083 0084 0086 0087 0089 20 0072 0073 0075 0076 0078 0079 0081 0082 0084 0085 0086 40 0070 0072 0073 0074 0076 0077 0079 0080 0081 0083 0084 20 0068 0070 0071 0073 0074 0075 0077 0078 0079 0081 0082 20 0067 0068 0069 0071 0072 0073 0075 0076 0077 0079 0080 40 0065 0066 0068 0069 0070 0072 0073 0074 0075 0077 0078 21 0063 0065 0066 0067 0068 0070 0071 0072 0074 0075 0076 20 0062 0063 0064 0065 0067 0068 0069 0070 0072 0073 0074 40 0060 0061 0063 0064 0065 0066 0067 0069 0070 0071 0072 22 0059 0060 0061 0062 0063 0065 0066 0067 0068 0069 0070 20 0057 0058 0059 0061 0062 0063 0064 0065 0066 0068 0069 40 0056 0057 0058 0059 0060 0061 0062 0064 0065 0066 0067 23 0054 0055 0057 0058 0059 0060 0061 0062 0063 0064 0065 20 0053 0054 0055 0056 0057 0058 0059 0060 0061 0063 0064 40 0052 0053 0054 0055 0056 0057 0058 0059 0060 0061 0062 24 0050 0051 0052 0053 0054 0055 0056 0057 0058 0059 0060 20 0050 0051 0052 0053 0054 0055 0056 0057 0058 0059 40 0049 0050 0051 0052 0053 0053 0054 0055 0056 0057 25 0047 0048 0049 0050 0051 0052 0053 0054 0055 0056 20 0046 0047 0048 0049 0050 0051 0052 0053 0053 0054 40 0045 0046 0047 0048 0049 0049 0050 0051 0052 0053 26 0044 0045 0046 0046 0047 0048 0049 0050 0051 0052 20 0043 0043 0044 0045 0046 0047 0048 0048 0049 0050 40 0041 0042 0043 0044 0045 0046 0046 0047 0048 0049 27 0040 0041 0042 0043 0044 0044 0045 0046 0047 0047 20 0039 0040 0041 0042 0042 0043 0044 0045 0045 0046 40 0038 0039 0040 0040 0041 0042 0043 0043 0044 0045 28 0037 0038 0039 0039 0040 0041 0042 0042 0043 0044 34 TABLE V. LOG. D. Logs. A, B, C, and D, for Limars. Apparent Altitude of 5- REDUCED PARALLAX AND REFRACTION OF > 50' 51' 52' 53' 54' 55' 56' 57' 58' 59' 6O' 28 0' 0.0037 0.0038 0.0039 0.0039 0.0040 0.0041 0.0042 0.0042 0.0043 0.0044 30 0.0036 0036 ! 0.0037 0.0038 0.0038 0.0039 0.0040 0.0040:0.0041 0.0042 29 0.0034 0.0035 0.0035 0.0036 0.0037 0.0037 0.0038 0.0039 0.0039 0.0040 30 0.0033 0.0033 0.0034 0.0035 0.0035 0.0036 0.0036 0.0037 0.0038 0.0038 30 0.003 1 0.0032 0.0032 0.0033 0.0034 0.0034 0.0035 0.0035 0.0036 0.0037 30 0.0030 0.0030 00031 0.0031 0.0032 0.0033 0.0033 0.0034 0.0034 0.0035 31 0.0028 0.0029 0.0029 00030 0.0031 0.0031 0.0032 0.0032 0.0033 0.0033 30 0.0027 0.0028 0.0028 0.0029 0.0029 0.0030 0.0030 0.0031 0.0031 0.0032 0.0032 32 0.0026 0.0026 0.0027 0.0027 0.0028 0.0028 0.0029 0.0029 0.0030 0.0030 0.0031 30 00024 0.0025 0.0025 0.0026 0.0026 0.0027 0.0027 0.0028 0.0028 0.0029 0.0029 33 0.0023 0.0024 0.0024 0.0025 0.0025 0.0025 0.0026 0.0026 0.0027 0.0027 0.0028 30 0.0022 0.0022 0.0023 0.0023 0.0024 0.0024 0.0025 0.0025 00025 0.0026 0.0026 34 0.0021 0.0021 0.0022 0.0022 0.0022 0.0023 0.0023 0.0024 0.0024 0.0024 0.0025 30 0.0020 0.0020 0.0020 0.0021 0.0021 0.0022 0.0022 0.0022 0.0023 0.0023 0.0023 35 0.0018 00019.0.0019 0.0020 0.0020 0.0020 0.0021 0.0021 0.0021 0.0022 0.0022 30 0.0017 0.0018 0.0018 0.0018 0.0019 0.0019 0.0019 0.0020 0.0020 0.0020 0.0021 36 0.0016 0.0017 0.0017 0.0017 0.0018 0.0018 0.0018 0.0019 0.0019 0.0019 0.0019 30 0.0015 0.0016 0.0016 0.0016 0.0016 0.0017 0.0017 0.0017 0.0018 0.0018 0.0018 37 0.0014 0.0014 0.0015 0.0015 0.0015 0.0016 0.0016 0.0016 0.0016 0.0017 0.0017 30 0.0013 0.0013 0.0014 0.0014 0.0014 0.0014 0.0015 00015 0.0015 0.0015 0.0016 38 0.0012 0.0012 0.0013 0.0013 0.0013 0.0013 0.0014 0.0014 0.0014 0.0014 0.0014 30 0.0011 0.0011 0.0012 0.0012 0.0012 0.0012 0.0012 0.0013 0.0013 0.0013 0.0013 39 0.0010 0.0010 0.0011 0.0011 0.0011 0.0011 00011 0.0012 0.0012 0.0012 0.0012 30 0.0009 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0011 0.0011 0.0011 40 0.0008 0.0009 0.0009 0.0009 0.0009 00009 0.0009 0.0010 0.0010 0.0010 41 0.0007 0.0007 0.0007 0.0007 0.0007 0.0007 0.0007 00007 0.0008 0.0008 42 0.0005 0.0005 0.0005 0.0005 0.0005 0.0005 0.0005 0.0005 0.0005 0.0006 43 0.0003 0.0003 0.0003 0.0003 0.0003 0.0003 0.0003 0.0003 0.0003 0.0004 44 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0002 0.0002 0.0002 0.0002 45 00000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 46 9.9998 9.9998 9.9998 9.9998 9.9998 9.9998 9.9998 9.9998 99998 9.9998 47 9.9997 9.9997 9.9997 9.9997 9.9996 9.9996 9.9996 9.9996 9.9996 9.9996 48 9.999519.9995 9.9995 9.9995 9.9995 9.9995 9.9995 9.9995 9.9994 9.9994 49 9.999419.9994 9.9994 9.9993 9.9993 9.9993 9.9993 9.9993 9.9993 9.9993 50 9.9992 9.9992 9.9992 9.9992 9.9992 9.9992 9.9992 9.9991 9.9991 9.9991 51 9.9991 9.9991 9.9991 9.9991 9.9990 9.9990 9.9990 9.9990 9.9990 9.9990 52 9.9990 9.9990 9.9990 9.9989 9.9989 9.9989 9.9989 9.9989 9.9988 9.9988 53 9.9989 9.9988 9.9988 9.9988 9.9988 9.9988 9.9987 9.9987 9.9987 9.9987 54 9.9988 9.9987 9.9987 9.9987 9.9987 9.9986 9.9986 9.9986 9.9986 9.9985 55 9.9986 9.9986 9.9986 9.9986 9.9985 9.9985 9.9985 9.9984 9.9984 9.9984 56 9.9985 9.9985 9.9985 9.9984 9.9984 9.9984 9^9984 9.9983 9.9983 9.9983 57 9.9984 9.9984 9.9984 9.9983 9.9983 9.9983 9.9982 9.9982 9.9982 9.9981 58 9.9983 9.9983 9.9983 9.9982 9.9982 9.9982 9.9981 9.9981 9.9981 9.9980 59 9.9982 9.9982 9.9981 9.9981 9.9981 9.9980 9.9980 9.9980 9.9979 9.9979 60 9.9981 9.9981 9.9980 9.9980 9.9980 9.9979 9.9979 9.9979 9.9978 9.9978 61 9.9980 9.9980 9.9980 9.9979 9.9979 9.9978 9.9978 9.9978 9.9977 9.9977 62 9.9979 9.9979 9.9979 9.9978 9.9978 9.9977 9.9977 9.9977 9.9976 9.9976 63 9.9979 9.9978 9.9978 9.9977 9.9977 9.9.976 9.9976 9.9976 9.9975 9.9975 64 9.9978 9.9977 9.9977 9.9976 9.9976 9.9976 9.9975 9.9975 9.9974 9.9974 65 9.9977 9.9977 9.9976 9.9976 9.9975 9.9975 9.9974 9.9974 9.9973 9.9972 66 9.9976 9.9976 9.9975 9.9975 9.9974 9.9974 9.9973 9.9973 9.9973 9.9972 67 9.9976 9.9975 9.9975 9.9974 9.9974 9.9973 9.9973 9.9972 9.9972 9.9971 68 9.9975 9.9974 9.9974 9.9973 9.9973 9.9972 9.9972 9.9971 9.9971 9.9970 69 9.9974 9.9974 9.9973 9.9973 9.9972 9.9972 9.9971 9.9971 9.9970 9.9970 70 9.9974 9.9973 9.9973 9.9972 9.9972 9.9971 9.9970 9.9970 9.9969 9.9969 72 9.9972 9.9972 9.9971 9.9971 9.9970 9.9970 9.9969 9.9969 9.9968 9.9968 74 9.9971 9.9971 9.9970 9.9970 9.9969 9.9969 9.9968 9.9968 9.9967 9.9966 76 9.9971 9.9970 9.9969 9.9969 9.9968 9.9968 9.9967 9.9966 9.9966(9.9965 78 9.9970 9.9969 9.9969 9.9968 9.9967 9.9967 9.9966 9.9966 9.996519.9964 80 9.9969 9.9969 9.9968 9.9967 9.9967 9.9966 9.9965 9.9965 9.9964 9.9964 90 9.9968 9.9967 9.9966 9.9966 9.9965 9.9964 9.9964 9.9963 9.9963 9.9962 35 TABLE VI. 'Second Correction of the Lunar Distance. Appar- FIRST CORRECTION OF DISTANCE. Appar- ent ent Dis- Dis- tance. 8' / 1(1 1J IHG 18 J4 M 27; 28 29 30 7 31 3J 13 ii Itf X tance. ^0 2122 2i 24 Subtr. Add. ;i5o' b 2 3 5 C) 8 11 13 14 16 17 19 20 22 24 '26 27 29 33 33 35 38 40 42 30 2 3 5 6 8 10 13 14 15 17 18 20 21 23 25 26 28 32 32 34 36 39 i 41 16 3 4 6| 8 10 12 13 15 16 18 19 21 22 24 26 27 31 31 33 35 37 39 30 3 4 6 8 10 12 13 14 16 17 18 20 21 23 25 27 30 30 32 34! 36 38 17 3 4 6 ! 7 9 11 13 14 15 16 18 19 21 22 24 26 29 29 31 33 35 37 30 3 4 5 7 9 11 12 13 15 16 17 19 20 22 23 25 28 28 30 32 34 36 18 3 4 5 7 9 11 12J13 14 15 17 18 20 21 23 24 28 28 29 31 33 35 30 3 4 5 7 8 10 12 13 14 15 16 18 19 20 22i23 27 27 28 30i 32 34 19 3 4 5 6 8 10 11 12 13 15 16 17 13 20 21 23 26 26 28 29 31 33 30 2 4 5 6 8 10 11 12 13 14 15 17 18 19 21 22 25 25 27 28 30 32 20 2 3 5 6 8 10 11 12 13 14 15 16 17 19 20;22 25 25 26 28 29 31 21 2 3 4 6 7 9 10 11 12 13 14 15 17 18 19 20 23 23 25 26 28 1 29 22 2 3 4 6 7 9 10 10 11 12 14 15 16 17 18 19 22 22 24 25 26 28 23 2 3 4 5 7 8 9 10 11 12 13 14 15 16 17|19 21 21 22 24 25 27 24 2 3 4 5 6 8 9 9 10 11 12 13 14 15 ie;i8 20 20 21 23 24 25 25 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 19 19 20 22 23 24 26 2 3 4 5 6 7 8 9 9 10 11 1-2 13 14 15 1G 18 18 19 21 22 23 27 2 2 3 4 6 7 8 8 9 10 11 12 12 13 14 15 18 18 19 20 i 21 22 28 2 2 3 4 5 7 7 8 9 9 10 11 12 13 14 15 17 17 18 19 20! 21 29 2 2 3 4 5 6 7 8 8 9 id 11 11 12 13 14 16 16 17 18 19 i 20 30 2 2 3 4 5 6 7 7 8 9 9 10 11 12 13 14 15 15 16 171 19 20 31 2 3 4 5 6 6 7 8 8 9 10 11 11 12 13 15 15 16 17 18 19 32 2 3 4 5 6 6 7 7 8 9 9 10 11 12 13 14 14 15 16 17 18 33 2 3 3 4 5 6 7 7 8 8 9 10 11 11 12 14 14 15 16 16 17 34 2 3 3 4 5 6 6 7 7 8 9 9 10 11 12 13 13 14 15 16 17 35 2 2 3 4 5 5 6 7 7 S 8 9 10 10 11 13 13 14 14 15 16 136 2 2 a 4 5 5 6 6 7 8 8 9 9 10 11 12 12 13 14 15 16 37 2 2 3 4 B 'i* 6 6 7 3 8 9 10 10 12 12 13 13 14 15 38 2 2 3 4 4 i?.5 5 6 6 :-? 8 8 9 9 10 11 11 12 13 14 14 39 1 2 2 a 3 4 5 5 6 6 V? 7 8 9 10 11 11 12 12 13 14 40 1 2 2 3 3 4 5 5 6 6 7 7 8 Q 9 9 11 11 ,11 12 13 13 140 42 2 2 3 4 4 5 5 6 6 7 7 1 8 8 9 10 10 11 11 12 13 138 44 2 2 3 4 4 4 5 5 6 6 1 7 8 8 9 9 10J 10 11 12 136 46 2 2 3 3 4 4 4 5 5 6 6 7 7 8 9 9 9 10 10 11 134 48 2 2 3 a 3 4 4 5 5 5 r> 6 7 7 8 8 9 9 10 10 132 50 2 2 3 3 4 4 4 5 5 5 6 6 7 8 8 8 8 9 9 130 52 2 2 3 3 3 4 4 4 5 5 5 6 6 7 7 7 8 8 9 128 54 2 2 3 3 3 3 4 4 4 5 5 5 6 6 7 7 8 8 126 56 2 2 2 3 3 3 3 4 4 4 5 5 5 6 6 6 *? 7 8 124 58 1 2 2 2 3 3 3 3 4 '4 4 v'S 5 6 ,6 6 6 7 7 122 60 2 2 2 2 3 3 3 3 4 4 4 5 5 5 5 6 6 7 120 62 2 2 2! 2 2 3 3 a 3 4 4 4 5 5 5 5 6 6 118 64 1 2 2 2 2 2 3 3 3 3 4 4 4 4 5 5 5 6 116 66 CO 2 2 2 20 2 2 2 3 3 3 3 3" 4 4 4 4 4 5 fi 114 bo 70 1 1 1 2 1 2 ::2 2 2 2 2 3 2 2 3 3 3 3 3 4 4 5 4 110 74 1 1 1 1 1 1 2 2 2i 2 2 2 3 3 3 3 3 3 106 78 1 1 1 l 1 1 1 1 1 2 2 2 2 2 2 2 2 102 82 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 98 86 1 1 1 1 1 1 1 1 94 90 90 Appar- i 7 id iil 11 16 18 20 If 22 ii il 25 m 2728 B SO si it ii 34 36 Appar- ent cnt Dis- Dis- tance. FIRST CORRECTION OF DISTANCE. tance. 36 TABLE VI. Second Correction of the Lunar Distance. Appar- FIRST CORRECTION OF DISTANCE. Appar. ent Tii^j ent Tlia ins- tance. H7 58 ;ig' 40 41 d 43 44 4546 4) 48 d ill ii i i 4 5> Si 57 58 flf 60' UlS- tance. Subtr ,. A,W 15 0' 45 47 50 52 55 57 60 63 66 69 72 75 78 81 85 88 91 95 99 102 106 no 113 117 30 43 45 48 50 53 56 58 61 64 67 70 72 76 79 82 85 88 92 95 99 102 106 110 113 16 42|44 40 49 51 54 56 59 62 64 67 70 73 76 79 82 85 89 92 95 99 102 106 110 30 40 43 45 47 50i52 54 57 60162 65 68 71 74 77 80 83 86 89 92 96 99 103 106 17 39 4 1 43 46 48; 50 53 55 58 60 63 66 69 71 74 77 80 83 86 90 93 96 99 103 30 98 40 42 44 47|49 51 54 56 59 61 64 66 69 72 75 78 81 84 87 90 93 96 100 18 30 37 36 39 38 41 40 43 42 45147 44 46 50 48 52 50 54 57 59 53 55 58 62 60 64 63 67 65 70 68 73 71 75 73 78 76 81 79 84 82 87 85 90 88 94 91 97 94 19 35 37 .-59 41 43 45 47 49 51 54 56 58 61 63 66 69 71 74 77 79 82 85 88 91 30 34 36 .'57 .'39 41 43 46 48 50 52 54 57 59 62 64 67 69 72 75 77 80 83 86 89 20 33 35 36 38 40 42 44 4(5 49 51 53 55 58 60 62 65 67 70 73 75 78 81 83 86 21 31 33 .'55 36 38 40 42 44 46 48 50 52 55 57 59 61 64 66 69 71 74 76 79 82 22 30 31 33 35 36 38 40 42 44 46 48 50 52 54 56 58 61163 65 68 70 73 75 78 23 28 30 31 33 .'35 36 38 40 42 44 45 47 49 51 53 56 58 60 62 64 67 69 72 74 24 '27 28 .'50 31 33 .'55 3(1 38 40 41 43 45 47 49 51 53 55 57 59 61 64 66 68 71 25 26 27 28 30 .'51 33 35 3fi 38 40 41 43 45 47 49 51 53 55 57 59 61 63 65 67 26 25 26 27 29 30 32 33 35 36 38 40 41 43 45 47 48 50 52 54 56 58 60 62 64 27 33 25 26 27 29 30 32 33 35 36 38 39 41 43 45 46 48 50 52 54 56 58 60 62 28 28 24 25 26 28 29 30 32 33 35 36 38 39 41 43 44 46 48 50 51 53 55 57 59 29 22 2-'} 24 25 26 28 29 30 32 33 35 36 38 39 41 43 44 46 48 49 51 53 55 57 30 21 22 2,'! 24 25 27 28 29 31 32 33 35 36 38 39141 42 44 46 47 49 51 53 54 31 20 21 22 2.'i 24 26 27 28 29 31 32 33 35 36 38 39 41 42 44 46 47 49 51 52 32 19 20 21 22 2:5 25 26 27 28 30 31 32 .31 85 36 38 39 41 42 44 45 47 49 50 33 18 19 20 22 23 24 25 26 27 28 30 31 32 34 35 36 38 39 41 42 44 45 47 48 34 18 19 20 21 22 23 24 25 26 27 29 30 31 32 34 35 36 38 39 41 42 44 45 47 35 17 18 19 20 21 22 23 24 25 26 28 29 30 31 32 34 35 36 38 39 40 42 43 45 36 If. 17 18 19 20 21 22 2.5 24 25 27 28 29 30 31 32 34 35 36 38 39 40 42 43 37 L6 17 18 19 19 20 21 22 23 25 26 27 28 29 3031 33 34 35 36 38 39 40 42 38 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29J30 31 33 34 35 36 38 39 40 39 15 16 16 17 15 19 20 21 22 23 24 25 26 27 28 29 30 31 33 34 35 36 38 39 40 14 15 16 17 17 18 L9 20 21 22 23 24 25 26 27 28 29 30 31 33 34 35 36 37 140 3 42 I.') 14 15 16 If) 17 18 19 20 21 21 22 23 24 25 26 27 28 29 30 31 33 34 35 138 44 12 13|l4 14 15 16 17 17 18 19 20 21 22 23 24 24 25 26 27 -28 29 30 31 33 136 46 12 12J13 13 14 15 16 16 17 18 19 19 20 21 2223 24 25 26 26 27 28 29 30 134 ! 48 11 11 12 13 13 14 15 15 16 17 17 18 19 20 20:21 22 23 24 25 26 26 27 28 132 50 10 11 11 12 12 13 14 14 15 16 16 17 18 18 19 20 21 21 22 23 24 25 25 26 ISO 52 9 10 10 11 11 12 13 13 14 Ullo 16 16 17 18|18 19 20 21 21 22 23 24 25 128- 54 9 9 10 10 11 11 12 12 13 13 14 15 15 16 16 17 18 18 19 20 21 21 22 23 126 56 8 9 9 9 10 10 11 11 12,; 12 13! 14 14 15 15J16 17 17 18 18 19 20 20 21 124 58 7 S 8 9- 9 10 10 11 11 12 12<13 13 14 14 15 15 16 16 17 18 18 19 20 122 CO 7 7 8 8 8 9 9 10'i 10 11 ill 12 12 13 13J14 14 15 15 16 16 17 18 18 120 62 6 -7 7 7 8 8 9 9 9 10 10 11 11 12 12! 13 13 14 14 15 15 16 16 17 118 64 G 6 6 7 '7 8 8 8 9 9 9 10 10 11 11J12 12 12 13 13 14 14 15 15 116 i 66 5 6 G 7 7 7 8 8 8 9 9 9 10 10 11 11 11 12 12 13 13 14 14 114 ] 68 5 5 5 6 6 6 7 7 7 i 7 8 8 8 9 9 10 10 10 11 11 11 12 12 13 112 70 *7 A 4 5 5 5 5 6 6 6 6 I 7 7 6f 8 8 8 9 7 9 7 9 10 10 10 11 11 11 110 1 HA /4 78 GO 8 9 3 ') 3 3 .) 3 2 3 .3 .) 4 4 4 2 o Q D 4 4 O Q 4 3 5 7 5 5 3 | 5 5 4" 6 6 6 8 6 6 9 7 lUb 102 no OS 86 1 I 1 1 1 1 I j I I O O i; ! 1 2 2 2 . 2 2 2 2 2 2 2 2 7O 94 90 o o 90 Appar- ent 37 ^ $0 ri id 11 42 n 44 45 46 47 .18 49 50 51 3l 51 M 55 56; . l a (i (i 7i 8 9 (ii 10 11 12 13 11 Li It) 17 18 20 25 It) 40 41' 65 56 42 63| 54 47 41 43 62 53 46 40 35 44 60 51 45 39 34! 30 27 45 58 50 43 38 33 30 26 24 21 20 46 57 49 42 37 33 29 26 29 21 19 17 15 47 56 48 41 36 32 28 25 23 20 19 17 14 12 10 48 54 46 40 35 31 28 25 22 20 18 17 14 12 10 9 8 7 6 49 53 45 39 35 30 27 24 22 19 18 16 14 12 10 9 8 7 6 6 5 3 50 52 44 38 34 30! 26 24 21 19 17 16 13 11 10 9 8 7 6 5 5 3 9 2 51 50 43 38 33 29 26 23 21 19 17 15 13 11 in .11 7" 7 6 5 5 3 2 2 2 52 49 42 37 32 28 ' 25 23 20 18 17 15 13 11 9 8 7 7 6 5 4 3 2 2 2 53 48 41 36 32 28 25 22 20 18 16 15 12 11 9 8 7 C 6 5 4 3 2 2 2 54 47 41 35 31 27 24 22 19 18 16 15 12 10 9 8 7 6 6 5 4 3 2 2 2 55 35 30 27 24 21 19 17 16 14 12 10 9 8 7 e G 5 4 3 2 2 2 56 26 23 21 19 17 15 14 12 10 9 8 7 i 5 5 4 3 2 2 2 57 18 17 15 14 12 10 9 7 7 t 5 5 4 3 2 2 2 58 13 11 10 8 7 7 f 5 5 4 3 2 2 2 59 8 7 6 G 5 5 4 3 2 2 2 60 4 3 2 ; 2 2 TABLE VII. B. CONTRACTION OF ]>'S SEMIDIAMETER. Wnole ARGUMENT = \UMBER FROM TABLE VII. A. Correction of }>. 2 4 6 8 10 12 M 10 13 mm 24 21) 2s 30 52 11 16 IS 40 44 48 rl 51) se 64 o' G 5 "0 10 - c i 1 1 1 1 1 1 1 l 1 i 1 1 1 15 1 1 1 1 1 1 1 i 1 1 1 '2 2 2 2 2 2 2 3 3 3 20 1 1 I 1 1 1 2 2 2 2 .2 2 3 3 3 3 3 4 4 4 4 5 5 22 d 1 1 1 1 I 2 2 * 2 2 3 3 3 3 3 3 4 4 4 5 5 5 6 6 24 1 1 I 2 2 2.2 3 3 3 3 3 4 4 4 4 5 5 6 6 6 7 7 26 1 1 1 2 2 2 2 a 3 3 4 4 4 4 5 5 5 5 6 6 7 8 8 9 28 1 1 2 2 2 3 3 a 3 4 4 4 5 5 5 6 B 6 "7 8 8 9 9 10 30 t 1 2 2 3 3 3 4 4 4 5 5 5 6 6 6 7 7 8 9 9 10 11 12 32 I 2 2 2 3 3 4 4 5 5 5 6 6 7 7 7 8 8 9 10 11 11 12 13 34 36 1 1 2 2 2 2 3 3 3 3 4 4 4 4 5 5 5 5 6 6 6 6 7 6 7 i 8 7 8 8 9 8 9 9 10 9 10 10 11 11 12 12 13 13 15 14 15 16 17 38 I 2' 2 3 3 4 5 5 6 6 7 8 8 9 9 10 10 11 12 13 14 15 16 17 18 40 I 2 3 3 4 4 5 6 1 7 8 8 9 9 10 ll 12 12 13 14 15 17 18 19 20 42 I 2 3 4 4 5 6 6 $ 8 8 9 10 11 ll 12 13 13 14 16 17 18 20 21 23 44 2 2 3 4 5 5 6 7 S 9 9 10 11 12!l2 13 14 15 15 17 19 20 22 23 45 2 2! 3 4 5 6 6 7 { 9 J 10 11 11 12 13 14 15 15 16 18 19 21 23 24 46 2 3 3 4 5 6 7 7 8 9 10 11 12 13114 14 15 16 17 19 20 22 24 47 2 3 4 4 5 6 * 8 9 10.11 11 12 13 14 15 16 17 18 19 21 23 25 48 2 3 4 5 667 8 9 10 ill 12 13 1415 16 17 18 18 20 22! 24 26 49 2 3! 4 5 6| 7 8 9 10 11|12 12 13 14 15 16 17118 19 21 23 25 50 2 3 4 5 6| 7 8 13 14 15 16 17 18 ; 19 20 22 24 26 51 2 3 ! 4 5 6 7 g 9 10 1I ! 12 14 15 16 17 18 19 20 21 23 25 27 52 2 3 4 5 I 8 q 10 11J12 13 14 15 16 17 18 19 2l|22 24i26 53 1 2 3 4 6 7 8 9 10 11 12113 15 16 17 18 19 20 21 22 25 27 54 2 3 5 6 "I 8 9 10 12:13114 15 16 17 19 20 21 22 23 26 55 2 4 5 6 7 8 10 11 12 13 15 16 17 18 19 >21 22 56 3 4 5 6 8 9 10 ll 13 14 15 16 57 1 4 5 7 ! ^^. When the nvartxt limb i* observed subtract this correction ; when the farthest, add. TABLE VIII. For finding the Correr.tion of the Lunar Distance for the Contraction of the Sun's Semidiameter. I TABLE VIII. A. GIVING THE ARGUMENT FOR TABLE VIII. B. Reduced APPARENT ALTITUDE OF 0. || P. and R. of. o 51 6 4 7 U n n 9 H 10 11 Q 12 Ii o 14 if 16 17 18 10 u 10 40 sol! 1' 0" 22 18 30 30 34 24 29 2 35 37 42 46 46 30 40 42 44 47 53 59 3 44 4G 49 51 53 57 30 45 48 51 54 57 60 62 G7 4 45 49 52 55 59 G2 65 63 30 47 49 51 55 59 63 66 70 5 47 50 52 54 57 Gl 6G 70 74 30 47 50 52 55 57 GO 62 67 72 6 49 52 55 57 60 G3 6G 68 74 30 50 53 56 59 G2 65 G8 71 74 7 51 54 5S 61 64 07 70 74 30 55 58J62 65 69 72 75 8 55 59 62 56 70 73 77 30 59 63 66 70 74 78 9 6-2 66 70 74 79 30 66 70 74 79 10 69 74 78 30 73 77 11 76 81 30 80 TABLE VIII. B. CONTRACTION OF 0*8 SEMIDIAMETER. Whole ARGUMENT= NUMBER FROM TABLE VIII. A. | Correction of Q. 20 i4 28 I! K 40 ii 46 48 ;5I) ^ U 6 58 60 61 64 66 68 70 72 74 76 78 ( ii 6 b 'o It // II tl u 1 1 i i i i 2 2 2 2 2 2 2 2 i 1 I 1 i 1 1 1 1 1 1 1 1 1 i 30 3 3 3 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1 i 3 4 4 K 4 5 3 5 3 3 3 3 3 3 3 3 2 2 2 2 2 2 2 30 9 7 f, g g g r. 4 20 7 7 7 7 G 6 6 6 5 5 5 5 5 5 5 4 4 40 9 8 8 8 7 7 7 7 G 6 6 6 6 5 5 5 5 5 0' 10 9 11 9 1 9 10 8 8 8 8 7 7 7 7 6 6 6 6 6 20 40 12 1 \ t 12 11 11 10 10 10 9 9 9 9 8 8 8 8 r 6 13 12 12 12 11 11 10 10 10 10 9 9 9 9 8 20 14 14 13 13 12 12 12 11 11 11 10 10 10 10 9 40 16 15 15 14 14 13 13 13 12 12 11 11 11 11 10 7 18 17 16 16 15 15 14 14 13 13 13 12 12 12 '1 20 40 19 IS 20 17 19 17 18 16 18 16 17 15 17 15 16 14.14 16|l5 13 15 13 14 13 14 i > 14 8 21 21 20 19 19 18 17 17 16 1G 16 15 15 20 22 21 20 20 19 18 18 17 17 16 16 40 23 23 22 21 20 20 19 19 18 18 17 9 24 23 22 21 21 20 20 19 19 20 25 24 23 22 22 21 21 20 40 25 25 24 23 23 22 22 10 26 2G 25 24 24 23 20 28 27 26 25 25 40 28 28 27 26 11 29 28 20 . 30 Subtract this correction fronri the distance. 39 TABLE IX. LOGARITHMS OF SMALL ARCS IN SPACE OR TIME. Arc. d 2 3 1 a 5 n 6 n 7 // 8 9 O | II O h. Q m. p. 0.0000 0.3010 0.4771 0.6021 0.6990 0.7782 0.8451 0.9031 0-9542 10 1.0000 1.0414 1.0792 1.1139 1.1461 1.1761 1.2041 1.2304 1.2553 1.2788 20 1.3010 1.3222 1.3424 1.3617 1.3802 1.3979! 1.4150 1.4314 1.4472 1.4624 30 1.4771 1.4914 1.5051 1.5185 1.5315 1.5441 1.5563 1.5682 1.5798 1.5911 40 1.6021 1.6128 1.6232 1.6335 1.6435 1.6532 1.6628 1.6721 .6812 1.6902 50 1.6990 1.7076 1.7160 1.7243 1.7324 1.7404 1.7482 1.7559 .7634 1.7709 1.7782 1.7853 1.7924 1.7993 1.8062 1.8129 1.8195 1.8261 .8325 1.8388 10 1.8451 1.8513 1.8573 1.8633 1.8692 1.8751 1.8808 1.8865 .8921 1.8976 20 1.9031 1.9085 1.9138 1.9191 1.9243 1.9294 1.9345 1.9395 .9445 1.9494 30 1.9542 1.9589 1.9638 1.9685 1.9731 1.9777 1.9823 1.9868 .9912 1.9956 40 2.0000 2.0043 2.0086 2.0128 2.0170 2.0212 2.0253 2.0294 2.0334 2.0374 50 2.0414 2.0453 2.0492 2.0531 2.0569 2.0607 2.0645 2.0682 2.0719 2.0755 020 2.0792 2.0828 2.0864 2.0899 2.0934 2.0969 2.1004 2.1038 2.1072 2.1106 2 10 2.1139 2.1173 2.1206 2.1239 2.1271 2.13031 2.1335 2.1367 2.1399 2.1430 2 20 2.1461 2.1492 2.1523 2.1553 2.1584 2.1614! 2.1644 2.1673 2.1703 2.1732 2 30 2.1761 2.1790 2.1818 2.1847 2.1875 2.1903 2.1931 2.1959 2.19-87 2.2014 2 40 2.2041 2.2068 2.2095 2.2122 2.2148 2.2175 2.2201 2.2227 2.2253 2.2279 2 50 2.2304 2.2330 2.2355 2.2380 2.24.05 2.2430 2.2455 2.2480 2.2504 2.2529 030 2.2553 2.2577 2.2601 2.2625 2.2648 2.2672 2.2695 2.2718 2.2742 2.2765 3 10 2.2788 2.2810 2.2833 2.2856 2.2878 2.2900 2.2923 2.2945 2.2967 2.2989 3 20 2.3010 2.3032 2.3054 2.3075 2.3096 2.3118 2.3139 2.3160 2.3181 2.3201 3 30 2.3222 2.3243 2.3263 2.3284 2.3304 2.3324 2.3345 2.3365 2.3385! 2.3404 3 40 2.3424 2.3444 2.3464 2.3483 2.3502 2.3522 2.3541 2.3560 2.3579! 2.3598 3 50 23617 2.3636 2.3655 2.3674 2.3692 2.3711 2.3729 2.3747 2.3766 2.3784 ' 040 2.3802 2.3820 2.3838 2.3856 2.3874 2.3892 2.3909 2.3927 2.3945! 2.3962 4 10 2.3979 2.3997 2.4014 2.4031 2.4048 2.4065 2.4082 2.4099 2.4116i 2.4133 4 20 2.4150 2.4166 2.4183 2.4200 2.4216 2.4232 2.42491 2.4265 2.4281! 2.4298 4 30 2.4314 2.4330 2.4346 2.4362 2.4378 2.4393 2.4409 2.4425 2.4440 2.4456 4 40 2.4472 2.4487 2.4502 2.4518 2.4533 2.4548 2.4564 2.4579 2.4594 2.4609 4 50 '2.4624 2.4639 2.4654 2.4669 2.4683 2.4698 2.4713 2.4728 2.4742 2.4757 050 2.4771 2.4786 2.4800 2.4814 2.4829 2.4843 2.4857 2.4871 2.4886 2.4900 5 10 2.4914 2.4928 2.4942 2.4955 2.4969 2.4983 2.4997 2.5011 2.5024 2.5038 5 20 2.5051 2.5065 2.5079 2.5092 2.5105 2.5119 2.5132 2.5145 2.5159 2.5172 5 30 2.5185 2.5198 2.5211 2.5224 2.5237 2.5250 2.5263 2.5276 2.5289 2.5302 5 40 2.5315 2.5328 2.5340 2.5353 2.5366 2.5378 2.5391 25403 2.5416 2.5428 5 50 2.5441 2.5453 2.5465 2.5478 2.5490 2.5502 2.5514 2.5527 2.5539 2.5551 060 2.5563 2.5575 2.5587 2.5599 2.5611 2.5623 2.5635 2.5647 2.5658 2.5670 6 10 2.5682 2.5694 2.5705 2.5717 2.5729 2.5740 2.5752 2.5763 2.5775 2.5786 6 20 2.5798' 2.5809 2.5821 2.5832 2.5843 2.5855 2.5866 2.5877 2.5888 2.5899 6 30 2.5911 2.5922 2.5933 2.5944 2.5955 2.5966 2.5977 2.5988 2.5999 2.6010 6 40 2.6021 2.6031 2.6042 2.6053 2.6064 2.6075 2.6085 2.6096 2.6107 2.6117 6 50 2.6128 2.6138 2.6149 2.6160 2.6170 2.6180 2.6191 2.6201 2.6212 2.6222 070 2.6232 2.6243 2.6253 2.6263 2.6274 2.6284 2.6294 2.6304 2.6314 2.6325 7 10 2.6335 2.6345 2.6355 2.6365 2.6375 2.6385 2.6395 2.6405 2.6415 2.6425 7 20 2.6435 2.6444 2.6454 2.6464 2.6474 2.6484 2.6493 2.6503 2.6513 2.6522 7 30 2.6532 2.6542 2.6551 2.6561 2.6571 2.6580 2.6590 2.6599 2.6609 2.6618 7 40 2.6628; 2.6637 2.6646 2.6656 2.6665 2.6675 ^.6684 2.6693 2.6702 2.6712 7 50 2.6721 2.6730 2.6739 2.6749 2.6758 2.6767 2.6776 2.6785 2.6794 2.6803 080 2.6812^ 2.6821 2.6830 2.68391 2.6848 2.6857 2.6866 2.6875 2.6884 2.6893 8 10 2.6902 2.6911 2.6920 2.69281 2.6937 2.6946 2.6955 2.6964 2.6972 2.6981 8 20 2.6990 2.6998 2.7007 2.7016 2.7024 2.7033 2.7042 2.7050 2.7059 2.7067 8 30 2.7076 2.7084 2.7093 2.7101 2.7110 2.7118 2.7126 2.7135 2.7143 2.7152 8 40 2.7160 2.7168 2.7177 2.7185 2.7193 2.7202 2.7210 2.7218 2.7226 2.7235 8 50 2.7243 2.7251 2.7259 2.7267 2.7275 2.7284 2.7292 2.7300 2.7308 2.7316 090 2.7324 2.7332 2.7340 2.7348 2.7356 2.7364 2.7372 2.7380 2.7388 2.7396 9 10 2.7404 2.7412 2.7419 2.7427 2.7435 2.7443 2.7451 2.7459 2.7466 2.7474 9 20 2.7482 2.7490 2.7497 2.7505 2.7513 2.7520 2.7528 2.7536 2.7543 2.7551 9 30 2.7559 2.7566 2.7574 2.7582 2.7589 2.7597 2.7604 2.7612 2.7619 2.7627 9 40 2.7634 2.7642! 2.7649 2.7657 2.7664 2.7672 2.7679 2.7686 2.7694 2.7701 ? 50 2.7709 2.7716 2.7723 2.7731 2.7738 2.7745 2.7752 2.7760 2.7767 2.7774 TABLE IX. LOGARITHMS OF SMALL ARCS IN SPACE OR TIME. l^r. n i 2 3 n 4 5 6 7 8 n 9 O h -lO m ' 0'- 2.7782 2.7789 2.7796,' 2.7803 2.7810 2.7818 2.7825 2.7832 2.7839 2.7846 10 10 2.7853 2.7860 2.7868| 2.7875 2.7882 2.7889 2.7896 2.7903 2.7910 2.7917 10 20 27924 2.7931 2.7938 2.7945 2.7952 2.7959 2.7966 2.7973 2.7980 2.7987 10 30 2.7993 2.8000 2.8007 2.8014 2.8021 2.8028 2.8035 2.8041 2.8048 2.8055 10 40 2.8062 2.8069 2.8075 2.8082 2.8089 2.8096 2.8102 2.8109 2.8116 2.8122 10 50 2.8129 2.8136 2.8142 2.8149 2.8156 2.8162 2.8169 2.8176 2.8182 2.8189 11 2.8195 2.8202 2.8209 2.8215 2.8222 2.8228 2.8235 2.8241 2.8248 2.8254 11 10 2.8261 2.8267 2.8274 2.8280 2.8287 2.8293 2.8299 2.8306 2.8312 2.8319 11 20 2.8325 2.8331 2.8338 2.8344 2.8351 2.8357 2.8363 2.8370 2.8376 2.8382 11 30 2.8388 2.8395 2.8401 2.8407 2.8414 2.8420 2.8426 2.8432 2.8439 2.8445 11 40 2.8451 2.8457 2.8463 2.8470 2.8476 2.8482 2.8488 2.8494 2.8500 2.8506 11 50 2.8513 2.8519 2.8525 2.8531 2.8537 2.8543 2.8549' 2.8555 2.8561 2.8567 12 2.8573 2.8579 2.8585 2.8591 2.8597 2.8603 2.8<> '.I i.8615 2.8621 2.8627 12 10 2.8633 2.8639 2.8645 2.8651 2.8657 2.8663 2.8tit:v) 2.8675 2.8681 2.8686 12 20 2.8692 2.8698 2.8704 2.8710 2.8716 2.8722 2.S7SS7. 2.8733 2.8739 2.8745 12 30 2.8751 2.8756 2.8762 2.8768 2.8774 2.8779 2.87 S.V 2.8791 2.8797 2.8802 12 40 2.8808 2.8814 2.8820 2.8825 2.8831 2.8837 2.8842 2.8848 2.8854 2.8859 12 50 2.8865 2.8871 2.8876 2.8882 2.8887 2.8893 2.8899 2.8904 2.8910 2.8915 13 2.8921 2.8927 2.8932 2.8938 2.8943 2.8949 2.8954 2.8960 2.8965 2.8971 13 10 2.8976 2.8982 2.8987 2.8993 2.8998 2.9004 2.9009 2.9015 2.9020 2.9025 13 20 2.9031 2.9036 2.9042 2.9047 2.9053 2.9058 2.9063 2.9069 2.9074; 2.9079 13 30 2.9085 2.9090 2.9096 2.9101 2.9106 2.9112 2.9117 2.9122 2.9128 2.9133 13 40 2.9138 2.9143 2.9149 2.9154 2.9159 2.9165 2.9170 2.9175 2.9180 2.9186 13 50 2.9191 2.9196 2.9201 2.9206 2.9212 2.9217 2.9222 2.9227 2.9232 29238 14 2.9243 2.9248 2.9253 2.9258 2.9263 2.9269 2.9274 2.9279 2.9284 2.9289 14 10 2.9294 2.9299 2.9304 2.9309 2.9315 2.9320 2.9325 2.9330 2.9335 2.9340 14 20 2.9345 2.9350 2.9355 2.9360 2.9365 2.9370 2.9375 2.9380 29385 2.9390 1 14 30 2.9395 2.9400 2.9405 2.9410 2.9415 2.9420 2.9425 2.9430 2.9435 2.9440 14 40 2.9445 2.9450 2.9455 2.9460 2.9465 2.9469 2.9474 2.9479 2.9484 2.9489 14 50 2.9494 2.9499 2.9504 2.9509 2.9513 2.9518 2.9523 2.9528 2.9533 2.9538 15 2.9542 2.9547 2.9552 2.9557 2.9562 2.9566 2.9571 2.9576 2.9581 2.9586 15 10 2.9590 2.9595 2.9600 2.9605 2.9609 2.9614 2.9619 2.9624 2.9628 2.9633 15 20 2.9638 2.9643 2.9647 2.9652 2.9657 T9661 2.9666 2.9671 2.9675 2.9680 15 30 2.9685 2.9689 2.9694 2.9699 2.9703 2.9708 2.9713 2.9717 2.9722 2.9727 15 40 2.9731 2.9736 2.9741 2.9745 2.9750 2.9754 2.9759 2.9763 2.9768 2.9773 15 50 2.9777 2.9782 2.9786 2.9791 2.9795 2.9800 2.9805 --2^809 2.9814 2.9818 16 2.9823 2.9827 2.9832 2.9836 2.9841 2.9845 2.9850 2.9854 2.9859 2.9863 16 10 2.9868 2.9872 29877 2.9881 2.9886 2.9890 2.9894 2.9899 2.9903 2.9908 16 20 2.9912 2.9917 2.9921 2.9926 2.9930 2.9934 2.9939 2.9943 2.9948 2.9952 16 30 2.9956 2.9961 2.9965 2.9969 2.9974 2.9978 2.9983 2.9987 2.9991 2.9996 16 40 3.0000 3.0004 3.0009 3.0013 3.0017 3.0022 3.0026 3.0030 3.0035 3.0039 16 50 3.0043 3.0048 3.0052 3.0056 3.0060 3.0065 3.0069 3.0073 3.0077 3.0082 17 3.0086 3.0090 3.0095 3.0099 3.0103 3.0107 3.0111 3.0116 3.0120 3.0124 17 10 3.0128 3.0133 3.0137 3.0141 3.0145 3.0149 3.0154 3.0158 3.0162 3.0166 17 20 3.0170 3.0175 3.0179 3.0183 3.0187 3.0191 3.0195 3.0199 3.0204' 3.0208 17 30 3.0212 3.0216 3.0220 3.0224 3.0228 3.0233 3.0237 3.0241 3.0245 3.0249 17 40 3.0253 3.0257 3.0261 3.0265 3.0269 3.0273 3.0278 3.0282 3.0286 ' 3.0290 17 50 3.0294 3.0298 3.0302 3.0306 3.0310 3.0314 3.0318 3.0322 3.0326 \ 3.0330 18 3.0334 3.0338 ; 3.0342 3.0346 3.0350 3.0354 3.0358 3.0362 3.0366 3.0370 18 10 3.0374 3.0378' 3.0382 3.0386 3.0390 3.0394 30398 3.0402 3.0406 3.0410 18 20 3.0414 3.041 8 1 3.0422 3.0426 3.0430 3.0434 3.0438 3.0441 3.0445 3.0449 18 30 3.0453 3.0457 3.0461 3.0465 3.0469 3.0473 3.0477 3.0481 3.0484 3.0488 18 40 3.0492 3.04961 3.0500 3.0504 3.0508 3.0512 3.0515 3.0519 3.0523 3.0527 18 50 3.0531 3.0535 3.0538 3.0542 3.0546 3.0550 3.0554 30558 3.0561 3.0565 19 3.0569 3.0573 3.0577 3.0580 3.0584 3.0588 3.0592 3.0596 3.0599 3.0603 19 10 3.0607 3.0611 3.0615 3.0618 3.0622 3.0626 3.0630 3.0633 3.0637 3.0641 19 20 3.0645 ! 3.0648 3.0652! 3.0656 3.0660 3.0663 3.0667 3.0671 3.0674 3.0678 19 30 3.0682' 3.0686 3.0689 3.0693 3.0697 3.0700 3.0704 3.0708 3.0711 3.0715 19 40 3.0719 3.0722 3.0726 3.0730 3.0734 3.0737 3.0741 3.0745 3.0748 3.0752 19 50 3.0755 3.0759 3.0763 3.0766 3.0770 3.0774 3.0777 3.0781 3.0785 3.0788 TABLE IX. LOGARITHMS OF SMALL ARCS IN SPACE OR TIME. Arc. n i 2 n 3 4 5 6 n 1 n 8 9 0, I II O h. 20 m. QS. 3.0792 3.0795 3.0799 3.0803 3.0806 3.0810 3.0813 3.0817 3.0821 3.0824 20 10 3.0828 3.0831 3.0835 3.0839 3.0842 3.0846 3.0849 3.0853 3.0856 3.0860 20 20 3.0864 3.0867 3.0871 3.0874 3.0878 3.0881 3.0885 3.0888 3.0892 3.0896 20 30 3.0899 3.0903 3.0906 3.0910 3.0913 3.0917 3.0920 3.0924 3.0927 3.0931 20 40 3.0934 3.0938 3.0941 3.0945 3.0948 3.0952 3.0955 3.0959 3.0962 3.0966 20 50 3.0969 3.0973 3.0976 3.0980 3.0983 3.0986 3.0990 3.0993 3.0997 3.1000 21 3.1004 3.1007 3.1011 3.1014 3.1017 3.1021 3.1024 3.1028 3.1031 3.1035 21 10 3.1038 3.1041 3.1045 3.1048 3.1052 3.1055 3.1059 3.1062 3.1065 3.1069 21 20 3.1072 3.1075 3.1079 3.1082 3.1086 3.1089 3.1092 3.1096 3.1099 3.1103 21 30 3.1106 3.1109 3.1113 3.1116 3.1119 3.1123 3.1126 3.1129 3.1133 3.1136 21 40 3.1139 3.1143 3.1146 3.1149 3.1153 3.1156 3.1159 3.1163 3.1166 3.1169 21 50 3.1173 3.1176 3.1179 31183 3.1186 3.1189 3.1193 3.1196 3.1199 3.1202 22 3.1206 3.1209 3.1212 3.1216 3.1219 3.1222 3.1225 3.1229 3.1232 3.1235 22 10 3.1239 3.1242 3.1245 3.1248 3.1252 3.1255 3.1258 3.1261 3.1265 3.1268 22 20 3.1271 3.1274 3.1278 3.1281 3.1284 3.1287 3.1290 3.1294 3.1297 3.1300 22 30 3.1303 3.1307 3.1310 3.1313 3.1316 3.1319 3.1323 3.1326 3.1329 3.1332 22 40 3.1335 3.1339 3.1342 3.1345 3.1348 3.1351 3.1355 3.1358 3.1361 3.1364 22 50 3.1367 3.1370 3.1374 3.1377 3.1380 3.1383 3.1386 3.1389 3.1392 3.1396 23 3.1399 3.1402 3.1405 3.1408 3.1411 3.1414 3.1418 31421 3.1424 3.1427 23 10 3.1430 3.1433 3.1436 3.1440 3.1443 3.1446 3.1449 3.1452 3.1455 3.1458 23 20 3.1461 3.1464 3.1467 3.1471 3.1474 3.1477 3.1480 3.1483 3.1486 3.1489 23 30 3.1492 3.1495 3.1498 3.1501 3.1504 3.1508 3.1511 3.1514 3.1517 3.1520 23 40 3.1523 3.1526 3.1529 3.1532 3.1535 3.1538 3.1541 3.1544 3.1547 3.1550 23 50 3.1553 3.1556 3.1559 3.1562 3.1565 3.1569 3.1572 3.1575 3.1578 3.1581 24 3.1584 3.1587 3.1590 3.1593 3.1596 3.1599 3.1602 3.1605 3.1608 3.1611 24 10 3.1614 3.1617 3.1620 3.1623 3.1626 3.1629 3.1632 3.1635 3.1638 3.1641 24 20 3.1644 3.1647 3.1649 3.1652 3.1655 3.1658 3.1661 3.1664 3.1667 3.1670 24 30 3.1673 3.1676 3.1679 3.1682 3.1685 3.1688 3.1691 3.1694 3.1697 3.1700 24 40 3.1703 3.1706 3.1708 3.1711 3.1714 3.1717 3.1720 3.1723 3.1726 3.1729 24 50 3.1732 3.1735 3.1738 3.1741 3.1744 3.1746 3.1749 3.1752 3.1755 3.1758 25 3.1761 3.1764 3.1767 3.1770 3.1772 3.1775 3.1778 3.1781 3.1784 3.1787 25 10 3.1790 3.1793 3.1796 3.1798 3.1801 3.1804 3.1807 3.1810 3.1813 3.1816 25 20 3.1818 3.1821 3.1824 3.1827 3.1830 3.1833 3.1836 3.1838 3.1841 3.1844 25 30 3.1847 3.1850 3.1853 3.1855 3.1858 3.1861 3.1864 3.1867 3.1870 3.1872 25 40 3.1875 3.1878 3.1881 3.1884 3.1886 3.1889 3.1892 3.1895 3.1898 3.1901 25 50 3.1903 3.1906 3.1909 3.1912 3.1915 3.1917 3.1920 3.1923 3.1926 3.1928 26 3.1931 3.1934 3.1937 3.1940 3.1942 3.1945 3.1948 3.1951 3.1953 3.1956 26 10 3.1959 3.19G2 3.1965 3.1967 3.1970 3.1973 3.1976 3.1978 3.1981 3.1984 26 20 3.1987 3.1989 3.1992 3.1995 3.1998 3.2000 3.2003 3.2006 3.2009 3.201 1 26 30 3.2014 3.2017 3.2019 3.2022 3.2025 3.2028 3.2030 3.2033 3.2036 3.2038 26 40 3.2041 3.2044 3.2047 3.2049 3.2052 3.2055 3.2057 3.2060 3.2063 3.2066 26 50 3.2068 3.2071 3.2074 3.2076 3.2079 3.2082 3.2084 3.2087 3.2090 3.2092 27 3.2095 3.2098 3.2101 3.2103 3.2106 3.2109 3.2111 3.2114 3.2117 3.2119 27 10 3.2122 3.2125 3.2127 3.2130 3.2133 3.2135 3.2138 3.2140 3.2143 3.2146 27 20 3.2148 3.2151 3.2154 3.2156 3.2159 3.2162 3.2164 3.2167 3.2170 3.2172 27 30 3.2175 3.2177 3.2180 3.2183 3.2185 3.2188 3.2191 3.2193 3.2196 3.2198 27 40 3.2201 3.2204 3.2206 3.2209 3.2212 3.2214 3.2217 3.2219 3.2222 3.2225 27 50 3.2227 3.2230 3.2232 3.2235 3.2238 3.2240 3.2243 3.2245 3.2248 3.2250 28 3.2253 3.2256 3.2258 3.2261 3.2263 3.2266 3.2269 3.2271 3.2274 3.2276 28 10 3.2279 3.2281 3.2284 3.2287 3.2289 3.2292 3.2294 3.2297 3.2299 3.2302 28 20 3.2304 3.2307 3.2310 3.2312 3.2315 3.2317 3.2320 3.2322 3.2325 3.2327 28 30 3.2330 3.2333 3.2335 3.2338 3.2340 3.2343 3.2345 3.2348 3.2350 3.2353 28 40 3.2355 3.2358 3.2360 3.2363 3.2365 3.2368 3.2370 3.2373 3.2375 3.2378 28 50 3.2380 3.2383 3.2385 3.2388 3.2390 3.2393 3.2395 3.2398 3.2400 3.2403 29 3.2405 3.2408 3.2410 3.2413 3.2415 3.2418 3.2420 3.2423 3.2425 3.2428 29 10 3.2430 3.2433 3.2435 3.2438 3.2440 3.2443 3.2445 3.2448 3.2450 3.2453 29 20 3.2455 3.2458 3.2460 3.24631 3.2465 3.2467 3.2470 3.2472 3.2475 3.2477 29 30 3.2480 3.2482 3.2485 3.2487 3.2490 3.2492 3.2494 3.2497 3.2499 3.2502 29 40 3.2504 3.2507 3.2509 3.2512 3.2514 3.2516 3.2519 3.2521 3.2524 3.2526 29 50 3.2529 3.2531 3.2533 j 3.2536 3.2538 3.2541 3.2543 1 3.2545 3.2548 3.2550 TABLE IX. LOGARITHMS OF SMALL ARCS IN SPACE OR TIME. Arc. d n 2 n 3 I 5 6 7 9 O, 1 II O h. 30 m. QS . 3.2553 3.2555 3.2558 3.2560 3.2562 3.2565 3.2567 3.2570 3.2572 3.2574 30 10 3.2577 3.2579 3.2582 3.2584 3.2586 3.2589 3.2591 3.2594 3.2596 3.2598 30 20 3.2601 3.2603 3.2605 3.2608 3.2610 3.2613 3.2615 3.2617 3.2620 3.2622 30 30 3.2625 3.2627 3.2629 3.2632 3.2634 3.2636 3.2639 3.2641 3.2643 3.2646 30 40 3.2648 3.2651 3.2653 3.2655 3.2658 3.2660 3.2662 3.2665 3.2667 3.2669 30 50 3.2672 3.2674 3.2676 3.2679 3.2681 3.2683 3.2686 3.2688 3.2690 3.2693 31 3.2695 3.2697 3.2700 3.2702 3.2704 3.2707 3.2709 3.2711 3.2714 3.2716 31 10 3.2718 3.2721 3.2723 3.2725 3.2728 3.2730 3.2732 3.2735 3.2737 3.2739 31 20 3.2742 3.2744 3.2746 3.2749 3.2751 3.2753 3.2755 3.2758 3.2760 3.2762 31 30 3.2765 3.2767 3.2769 3.2772 3.2774 3.2776 3.2778 3.2781 3.2783 3.2785 31 40 3.2788 3.2790 3.2792 3.2794 3.2797 3.2799 3.2801 3.2804 3.2806 3.2808 31 50 3.2810 3.2813 3.2815 3.2817 3.2819 3.2822 3.2824 3.2826 3.2828 3.2831 32 3.2833 3.2835 3.2838 3.2840 3.2842 3.2844 3.2847 3.2849 3.2851 3.2853 32 10 3.2856 3.2858 3.2860 3.2862 3.2865 3.2867 3.2869 3.2871 3.2874 3.2876 32 20 3.2878 3.2880 3.2882 3.2885 3.2887 3.2889 3.2891 3.2894 3.2896 3.2898 32 30 3.2900 3.2903 3.2905 3.2907 3.2909 3.2911 3.2914 3.2916 3.2918 3.2920 32 40 3.2923 3.2925 3.2927 3.2929 3.2931 3.2934 3.2936 3.2938 3.2940 3.2942 32 50 3.2945 3.2947 3.2949 3.2951 3.2953 3.2956 3.2958 3.2960 3.2962 3.2964 33 3.2967 3.2969 3.2971 3.2973 3.2975 3.2978 3.2980 3.2982 3.2984 3.2986 33 10 3.2989 3.2991 3.2993 3.2995 3.2997 3.2999 3.3002 3.3004 3.3006 3.3008 33 20 3.3010 3.3012 3.3015 3.3017 3.3019 3.3021 3.3023 3.3025 3.3028 3.3030 33 30 3.3032 3.3034 3.3036 3.3038 3.3041 3.3043 3.3045 3.3047 3.3049 3.3051 3? 40 3.3054 3.3056 3.3058 3.3060 3.3062 3.3064 3.3066 3.3069 3.3071 3.3073 33 50 3.3075 33077 3.3079 3.3081 3.3084 3.3086 3.3088 3.3090 3.3092 3.3094 34 3.3096 3.3098 3.3101 3.3103 3.3105 3.3107 3.3109 3.3111 3.3113 3.3115 34 10 3.3118 3.3120 3.3122 3.3124 3.3126 3.3128 3.3130 3.3132 3.3134 3.3137 34 20 3.3139 3.3141 3.3143 3.3145 3.3147 3.3149 3.3151 3.3153 3.3156 3-3158 34 30 3.3160 3.3162 3.3164 3.3166 3.3168 3.3170 3.3172 3.3174 3.3176 3.3179 34 40 3.3181 3.3183 3.3185 3.3187 3.3189 3.3191 3.3193 3.3195 3.3197 3.3199 34 50 3.3201 3.3204 3.3206 3.3208 3.3210 3.3212 3.3214 3.3216 3.3218 3.3220 35 3.3222 3.3224 3.3226 3.3228 3.3230 3.3233 3.3235 3.3237 3.3239 3.3241 35 10 3.3243 3.3245 3.3247 3.3249 3.3251 3.3253 3.3255 3.3257 3.3259 3.3261 35 20 3.3263 3.3265 3.3267 3.3269 3.3272 3.3274 3.3276 3.3278 3.3280 3.3282 35 30 3.3284 3.3286 3.3288 3.3290 3.3292 3 3294 3.3296 3.3298 3.3300 3.3302 35 40 3.3304 3.3306 3.3308 3.3310 3.3312 3.3314 3.3316 3.3318 3.3320 3.3322 35 50 3.3324 3.3326 3.3328 3.3330 3.3332 3.3334 3.3336 3.3339 3.3341 3.3343 36 3.3345 3.3347 3.3349 3.3351 3.3353 3.3355 3.3357 3.3359 3.3361 3.3363 36 10 3.3365 3.3367 3.3369 3.3371 3.3373 3.3375 3.3377 3.3379 3.3381 3.3383 36 20 3.3385 3.3387 3.3389 3.3391 3.3393 3.3395 3.3397 3.3398 3.3400 3.3402 36 30 3.3404 3.3406 3.3408 3.3410 3.3412 3.3414 3.3416 3.3418 3.3420 3.3422 36 40 3.3424 3.3426 3*3428 3.3430 3.3432 3.3434 3.3436 3.3438 3.3440 3.3442 36 50 3.3444 3.3446 3.3448 3.3450 3.3452 3.3454 3.3456 3.3458 3.3460 3.3462 37 3.3464 3.3465 3.3467 3.3469 3.3471 3.3473 3.3475 3.3477 3.3479 3.3481 37 10 3.3483 3.3485 3.3487 3.3489 3.3491 3.3493 3.3495 3.3497 3.3499 3.3501 37 20 3.3502 3.3504 3.3506 3.3508 3.3510 3.3512 3.3514 3.3516 3.3518 3.3520 37 30 3.3522 33524 3.3526 3.3528 3.3530 3.3531 3.3533 3.3535 3.3537 3.3539 37 40 3.3541 3.3543 3.3545 3.3547 3.3549 3.3551 3.3553 3.3555 3.3556 3.3558 37 50 3.3560 33562 3.3564 3.3566 3.3568 3.3570 3.3572 3.3574 3.3576 3.3577 38 3.3579 3.3581 3.3583 3.3585 3.3587 3.3589 3.3591 3.3593 3.3595 3.3596 38 10 3.3598 3.3600 3.3602 3.3604 3.3606 3.3608 3.3610 3.3612 3.3614 3.3615 38 20 3.3617 3.3619 3.3621 3.3623 3.3625 3.3627 3.3629 3.3630 3.3632 3.3634 38 30 3.3636 3.3638 3.3640 3.3642 3.3644 3.3646 3.3647 3.3649 3.3651 3.3653 38 40 3.3655 3.3657 3.3659 3.3660 3.3662 3.3664 3.3666 3.3668 3.3670 3.3672 38 50 3.3674 3.3675 3.3677 3.3679 3.3681 3.3683 3.3685 3.3687 3.3688 3.3690 39 3.3692 3.3694 3.3696 3.3698 3.3700 3.3701 3.3703 3.3705 3.3707 3.3709 39 10 3.3711 3.3713 3.3714 3.3716 3.3718 3.3720 3.3722 3.3724 3.3725 3.3727 39 20 3.3729 3.3731 3.3733 3.3735 3.3736 3.3738 3.3740 3.3742 3.3744 3.3746 39 30 3.3747 3.3749 3.3751 3.3753 3.3755 3.3757 3.3758 3.3760 3.3762 3.3764 39 40 3.3766 3.3768 3.3769 3.3771 3.3773 3.3775 3.3777 3.3779 3.3780 3.3782 39 50 3.3784 3.3786 3.3788 3.3789 3.3791 3.3793 3.3795 3.3797 3.3798 3.3800 TABLE LOGARITHMS OF SMALL ARCS IN SPACE OR TIME. Arc. d n 2 n 3 1 a 5 6 n 7 n 8 9 O h -40 m - o',. 3.3802 3.3804 3.3806 3.3808 3.3809 3.3811 3.3813 3.3815 3.3817 3.3818 40 10 3.3820 3.3822 3.3824 3.3826 3.3827 3.3829 3.3831 3.3833 3.3835 3.3836 40 20 3.3838 3.3840 3.3842 3.3844 3.3845 3.3847 3.3849 3.3851 3.3852 3.3854 40 30 3.3856 3.3858 3.3860 3.3861 3.3863 3.3865 3.3867 3.3869 3.3870 3.3872 40 40 3.3874 3.3876 3.3877 3.3879 3.3881 3.3883 3.3885 3.3886 3.3888 3.3890 40 50 3.3892 3.3893 3.3895 3.3897 3.3899 3.3901 3.3902 3.3904 3.3906 3.3908 - 41 3.3909 3.3911 3.3913 3.3915 3.3916 3.3918 3.3920 3.3922 3.3923 3.3925 41 10 3.3927 3.3929 3.3930 3.3932 3.3934 3.3936 3.3938 3.3939 3.3941 3.3943 41 20 3.3945 3.3946 3.3948 3.3950 3.3952 3.3953 3.3955 3.3957 3.3959 3.3960 41 30 3.3962 3.3964 3.3965 3.3967 3.3969 3.3971 3.3972 3.3974 3.3976 3.3978 41 40 3.3979 3.3981 3.3983 3.3985 3.3986 3.3988 3.3990 3.3992 3.3993 3.3995 41 50 3.3997 3.3998 3.4000 3.4002 3.4004 3.4005 3.4007 3.4009 3.4011 3.4012 42 3.4014 3.4016 3.4017 3.4019 3.4021 3.4023 3.4024 3.4026 3.4028 3.4029 42 10 3.4031 3.4033 3.4035 3.4036 3.4038 3.4040 3.4041 3.4043 3.4045 3.4047 42 20 3.4048 3.4050 3.4052 3.4053 3.4055 3.4057 3.4059 3.4060 3.4062 3.4064 42 30 3.4065 3.4067 3.4069 3.4071 3.4072 3.4074 3.4076 3.4077 3.4079 3.4081 42 40 3.4082 3.4084 3.4086 3.4087 3.4089 3.4091 3.4093 3.4094 3.4096 3.4098 42 50 3.4099 3.4101 3.4103 3.4104 3.4106 3.4108 3.4109 3.4111 3.4113 3.4115 43 3.4116 3.4118 3.4120 3.4121 3.4123 3.4125 3.4126 3.4128 3.4130 3.4131 43 10 3.4133 3.4135 3.4136 3.4138 3.4140 3.4141 3.4143 3.4145 3.4146 3.4148 43 20 3.4150 3.4151 3.4153 3.4155 3.4156 3.4158 3.4160 3.4161 3.4163 3.4165 43 30 3.4166 3.4168 3.4170 3.4171 3.4173 3.4175 3.4176 3.4178 3.4180 3.4181 43 40 34183 3.4185 3.4186 3.4188 3.4190 3.4191 3.4193 3.4195 3.4196 3.4198 43 50 3.4200 3.4201 3.4203 3.4205 3.4206 3.4208 3.4209 3.4211 3.4213 3.4214 44 3.4216 3.4218 3.4219 3.4221 3.4223 3.4224 3.4226 3.4228 3.4229 3.4231 44 10 3.4232 3.4234 3.4236 3.4237 3.4239 3.4241 3.4242 3.4244 3.4246 3.4247 44 20 3.4249 3.4250 3.4252 3.4254 3.4255 3.4257 3.4259 3.4260 3.4262 3.4263 44 30 3.4265 3.4267 3.4268 3.4270 3.4272 3.4273 3.4275 3.4276 J.4278 3.4280 44 40 3.4281 3.4283 3.4285 3.4286 3.4288 3.4289 3.4291 3.4293 3.4294 3.4296 44 50' 3.4298 3.4299 3.4301 3.4302 3.4304 3.4306 3.4307 3.4309 3.4310 3.4312 45 3.4314 3.4315 3.4317 3.4318 3.4320 3.4322 3.4323 3.4325 3.4326 3.4328 45 10 3.4330 3.4331 3.4333 3.4334 3.4336 3.4338 3.4339 3.4341 3.4342 3.4344 45 20 3.4346 3.4347 3.4349 3.4350 3.4352 3.4354 3.4355 3.4357 3.4358 3.4360 45 30 3.4362 3.4363 3.4365 3.4366 3.4368 3.4370 3.4371 3.4373 3.4374 3.4376 45 40 3.4378 3.4379 3.4381 3.4382 3.4384 3.4385 3.4387 3.4389 3.4390 3.4392 45 50 3.4393 3.4395 3.4396 3.4398 3.4400 3.4401 3.4403 3.4404 3.4406 3.4408 46 3.4409 3.4411 3.4412 3.4414 3.4415 3.4417 3.4419 3.4420 3.4422 3.4423 46 10 3.4425! 3.4426 3.4428 3.4429 3.4431 3.4433 3.4434 3.4436 3.4437 3.4439 46 20 3.4440 3.4442 3.4444 3.4445 3.4447 3.4448 3.4450 3.4451 3.4453 3.4454 46 30 3.4456 3.4458 3.4459 3.4461 3.4482 3.4464 3.4465 3.4467 3.4468 3.4470 46 40 3.4472 3.4473 3.4475 3.4476 3.4478 3.4479 3.4481 3.4482 3.4484 3.4486 46 50 3.4487 3.4489 3.4490 3.4492 3.4493 3.4495 3.4496 3.4498 3.4499 3.4501 47 3.4502 3.4504 3.4506 3.4507 3.4509 3.4510 3.4512 3.4513 3.4515 3.4516 47 10 3.4518 3.4519 3.4521 3.4522 3.4524 3.4526 3.4527 3.4529 3.4530 3.4532 47 20 3.45331 3.4535 3.4536 3.4538 3.45-39 3.4541 3.4542 3.4544 3.4545 3.4547 47 30 3.45481 3.4550 3.4551 3.4553 3.4555 3.4556 3.4558 3.4559 ! 3.4561 3.4562 47 40 3.4564 3.4565 3.4567 3.4568 3.4570 3. 4 5 VI 3.4573 3.4574 3.4576 3.4577 v47 50 3.4579 3.4580 3.4582 3.4583 3.4585 3.4586 3.4588 3.4589 3.4591 3.4592 48 3.4594 3.4595 3.4597 3.4598; 3.4600 3.4601 3.4603 3.4604 3.4606 3.4607 48 10 3.4609 3.4610 3.4612 3.4613 3.4615 3.4616 3.4618 3.4619 3.4621 3.4622 48 20 3.4624J 3.4625 3.4627 3.4628 3.4630 3.4631 3.4633 3.4634 3.4636 3.4637 48 30 3.46391 3.4640 3.4642 3.4643 3.4645 3.4646 3.4648 3.4649! 3.4651 3.4652 48 40 3.4654 i 3.4655 3.4657 3.4658 3.4660 3.4661 3.4663 3.4664' 3.4666 3.4667 48 50 3.4669 3.4670 3.4672 3.4673 3.4675 3.4676 3.4678 3.4679, 3.4681 3.4682 49 3.4683 3.4685 3.4686 .3.4688 3.4689 3.4691 3.4692 3.4694 3.4695 3.4697 49 10 3.4698 3.4700 3.4701 3.4703 3.4704 3.4706 3.4707 3.4709 3.4710 3.4711 49 20 3.4713! 3.4714 3.4716 3.4717 3.4719 3.4720! 3.4722 3.4723 3.4725 3.4726 49 30 3.4728, 3.4729 3.4730 3.4732 34733 3.4735! 3.4736 3.4738 3.4739 1 3.4741 49 40 3.4742 3.4744 3.4745 3.4747 3.4748 3.47491 3.4751 3.4752 3.4754| 3.4755 49 50 3.47571 3.4758 3.4760 3.4781 3.4763 34764 3.4765 3.4767 3.4768! 3.4770 44: TABLE IX. LOGARITHMS OF SMALL ARCS IN SPACE OR TIME. Arc. d it it 2 it 3 4 ii 5 6 u 7 u 8 9 O h '50 m - s - 3.4771 3.4773 3.4774 3.4776 3.4777 3.4778 3.4780 3.4781 3.4783 3.4784 50 10 3.4786 3.4787 3.4789 3.4790 3.4791 3.4793 3.4794 3.4796 3.4797 3.4799 50 20 3.4800 3.4802 3.4803 3.4804 3.4806 3.4807 3.4809 3.4810 3.4812 3.4813 50 30 3.4814 3.4816 3.4817 3.4819 3.4820 3.4822 3.4823 3.4824 3.4826 3.4827 50 40 3.4829 3.4830 3.4832 3.4833 3.4834 3.4836 3.4837 3.4839 3.4840 3.4842 50 50 3.4843 3.4844 3.4846 3.4847 3.4849 3.4850 3.4852 3.4853 3.4854 3.4856 51 3.4857 3.4859 3.4860 3.4861 3.4863 3.4864 3.4866 3.4867 3.4869 3.4870 51 10 3.4871 3.4873 3.4874 3.4876 3.4877 3.4878 3.4880 3.4881 3.4883 3.4884 51 20 3.4886 3.4887 3.4888 3.4890 3.4891 3.4893 3.4894 3.4895 3.4897 3.4898 51 30 .3.4900 3.4901 3.4902 3.4904 3.4905 3.4907 3.4908 3.4909 3.4911 3.4912 51 40 3.4914 3.4915 3.4916 3.4918 3.4919 3.4921 3.4922 3.4923 3.4925 3.4926 51 50 3.4928 3.4929 3.4930 3.4932 3.4933 3.4935 3.4936 3.4937 3.4939 3.4940 52 34942 3.4943 3.4944 3.4946 3.4947 3.4949 3.4950 3.4951 3.4953 3.4954 52 10 3.4955 3.4957 3.4958 3.4960 3.49 01 3.4962 3.4964 3.4965 3.4967 3.4968 52 20 3.4969 3.4971 3.4972 3.4973 3.4975 3.4976 3.4978 3.4979 3.4980 3.4982 52 30 3.4983 3.4984 3.4986 3.4987 3.4989 3.4990 3.4991 3.4993 3.4994 3.4995 52 40 3.4997 3.4998 3.5000 3.5001 3.5002 3.5004 3.5005 3.5006 3.5008 3.5009 52 50 3.5011 35012 3.5013 3.5015 3.5016 3.5017 3.5019 3.5020 3.5022 3.5023 53 3.5024 3.5026 3.5027 3.5028 3.5030 3.5031 3.5032 3.5034 3.5035 3.5037 53 10 3.5038 3.5039 3.5041 3.5042 3.5043 3.5045 3.5046 3.5047 3.5049 3.5050 53 20 3.5051 3.5053 3.5054 3.5056 3.5057 3.5058 3.5060 3.5061 3.5062 3.5064 53 30 3.5065 3.5066 3.5068 3.5069 3.5070 3.5072 3.5073 3.5075 3.5076 3.5077 53 40 3.5079 3.5080 3.5081 3.5083 3.5084 3.5085 3.5087 3.5088 3.5089 3.5091 53 50 3.5092 3.5093 3.5095 3.5096 3.5097 3.5099 3.5100 3.5101 3.5103 35104 54 3.5105 3.5107 3.5108 3.5109 3.5111 3.5112 3.5113 3.5115 3.5116 3.5117 54 10 3.5119 3.5120 3.5122 3.5123 3.5124 3.5126 3.5127 3.5128 3.5130 3.5131 54 20 3.5132 3.5134 3.5135 3.5136 3.5138 3.5139 3.5140 3.5141 3.51431 3.5144 54 30 3.5145 3.5147 3.5148 3.5149 3.5151 3.5152 3.5153 3.5155 3.5156 3.5157 54 40 3.5159 3.5160 3.5161 3.5163 3.5164 3.5165 3.5167 3.5168 3.5169 3.5171 54 50 3.5172 3.5173 3.5175 3.5176 3.5177 3.5179 3.5180 3.5181 3.5183 3.5184 55 3.5185 3.5186 3.5188 3.5189 3.5190 3.5192 3.5193 3.5194 3.5196 3.5197 55 10 3.5198 3.5200 3.5201 3.5202 3.5204 3.5205 3.5206 3.5207 3.5209 3.5210 55 20 3.5211 3.5213 3.5214 3.5215 3.5217 3.5218 3.5219 3.5221 3.5222 3.5223 55 30 3.5224 3.5226 3.5227 3.5228 3.5230 8.5231 3.5232 3.5234 3.5235 3.5236 55 40 3.5237 3.5239 3.5240 3.5241 3.5243 3.5244 3.5245 3.5247 3.5248 3.5249 55 50 3.5250 3.5252 3.5253 3.5254 3.5256 3.5257 3.5258 3.5260 3.5261 3.5262 56 3.5263 3.5265 3.5266 3.5267 3.5269 3.5270 3.5271 3.5272 3.5274 3.5275 56 10 3.5276 3.5278 3.5279 3.5280 3.5281 3.5283 3.5284 3.5285 3.5287 3.5288 56 20 3.5289 3.5290 3.5292 3.5293 3.5294 3.5296 3.5297 3.5298 3.5299 3.5301 56 30 3.5302 3.5303 3.5305 3.5306 3.5307 3.5308 3.5310 3.5311 3.5312 3.5314 56 40 3.5315 3.5316 3.5317 3.5319 3.5320 3.5321 3.5322 3.5324 3.5325 3.5326 56 50 3.5328 3.5329 3.5330 3.5331 3.5333 3.5334 3.5335 3.5336 3.5338 3.5339 57 3.5340 3.5342 3.5343 3.5344 3.5345 3.5347 3.5348 3.5349 3.5350 3.5352 57 10 3.5353 3.5354 3.5355 3.5357 3.5358 3.5359 3.5361 3.5362 3.5363 3.5364 57 20 3.5366 3.5367 3.5368 3.5369 3.5371 3.5372 3.5373 3.5374 3.5376 3.5377 57 30 3.5378 3.5379 3.5381 3.5382 3.5383 3.5384 3.5386 3.5387 3.5388 3.5390 57 40 3.5391 3.5392 3.5393 3.5395 3.5396 3.5397 3.5398 3.5400 3.5401 3.5402 57 50 3.5403 3.5405 3.5406 3.5407 3.5408 3.5410 3.5411 3.5412 3.5413 3.5415 58 3.5416 3.5417 3.5418 3.5420 3.5421 3.5422 3.5423 3.5425 3.5426 3.5427 58 10 3.5428 3.5429 1 3.5431 3.5432 3.5433 3.5434 35436 3.5437 3.5438! 3.5439 58 20 3.5441 3.5442! 3.5443 3.5444 3.5446 3.5447 3.5448 3.5449 3.5451 3.5452 58 30 3.5453 3.5454 3.5456 3.5457 3.5458 3.5459 3.5460 3.5462 3.5463; 3.5464 58 40 3.5465 3.5467 3.5468 3.5469 3.5470 3.5472 3.5473 3.5474 3.5475 3.5477 58 50 3.5478 3.5479 3.5480 3.5481 3.5483 3.5484 3.5485 35486 3.5488 3.5489 59 3.5490 3.5491 3.5492 3.5494 3.5495 3.5496 3.5497 3.5499 3.5500 3.5501 59 10 3.5502 3.5504 3.5505 3.5506 3.5507 3.5508 3.5510 3.5511 3.5512 3.5513 59 20 3.5514 3.5516 3.5517 3.5518 3.5519 3.5521 3.5522 3.5523 3.5524 3.5525 59 30 3.5527 3.5528 3.5529 3.5530 3.5532 3.5533 3.5534 3.5535 3.5536 3.5538 59 40 3.5539 3.5540 3.5541 3.5542 3.5544 3.5545 3.5546 3.5547 3.5549 3.5550 59 50 3.5551 3.5552 3.5553 3.5555 3.5556 3.5557 3.5558 3.5559 3.5561 3.5562 45 TABLE IX. LOGARITHMS OF SMALL ARCS IN SPACE OR TIME. E i 2 n 3 4 5 6 7 8 n 9 I , i n ij 1* O' n> O 3 - 3.5563 3.5564 3.5565 3.5567 3.5568 3.5569 3.5570 3.5571 3.5573 3.5574 10 3.5575 3.5576 3.5577 3.5579 3.5580 3.5581 3.5582 3.5583 3.5585 3.5586 20 3.5587 3.5588 3.5589 3.5591 3.5592 3.5593 3.5594 3.5595 3.5597 3.5598 30 3.5599 3.5600 3.5601 3.5603 3.5604 3.5605 3.5606 3.5607 3.5609 3.5610 40 3.5611 3.5612 3.5613 3.5615 3.5616 3.5617 3.5618 3.5619 3.5621 3.5622 50 3.5623 3.5624 3.5625 3.5626 3.5628 3.5629 3.5630 3.5631 3.5632 3.5634 1 3.5635 3.5636 3.5637 3.5638 3.5640 3.5641 3.5642 3.5643 3.5644 35645 10 3.5647 3.5648 3.5649 3.5650 3.5651 3.5653 3.5654 3.5655 3.5656 3.5657 20 3.5658 3.5660 3.5661 3.5662 3.5663 3.5664 3.5666 3.5667 3.5668 3.5669 30 3.5670 3.5671 3.5673 3.5674 3.5675 3.5676 3.5677 3.5678 3.5680 3.5681 40 3.5682 3.5683 3.5684 3.5686 3.5687 3.5688 3.5689 3.5690 3.5691 3.5693 50 3.5694 3.5695 3.5696 35697 3.5698 3.5700 3.5701 3.5702 3.5703 3.5704 1 2 3.5705 3.5707 3.5708 3.5709 3.5710 3.5711 3.5712 3.5714 3.5715 3.5716 2 10 3.5717 3.5718 3.5719 3.5721 3.5722 3.5723 3.5724 3.5725 3.5726 35728 2 20 3.5729 3.5730 3.5731 3.5732 3.5733 3.5735 3.5736 3.5737 3.5738 3.5739 2 30 3.5740 3.5741 3.5742 3.5744 3.5745 3.5746 3.5747 3.5748 3.5750 3.5751 2 40 3.5752 3.5753 3.5754 3.5755 3.5756 3.5758 3.5759 3.5760 3.5761 3.5762 2 50 3.5763 3.5765 3.5766 3.5767 3.5768 3.5769 3.5770 3.5771 3.5773 3.5774 1 3 3.5775 3.5776 3.5777 3.5778 3.5780 3.5781 3.5782 3 5783 3.5784 3.5785 3 10 3.5786 3.5788 3.5789 3.5790 3.5791 3.5792 3.5793 3.5794 3.5796 3.5797 3 20 3.5798 3.5799 3.5800 3.5801 3.5802 3.5804 3.5805 3.5806 3.5807 3.5808 3 30 3.5809 3.5810 3.5812 3.5813 3.5814 3.5815 3.5816 3.5817 3.5818 3.5819 3 40 3.5821 3.5822 3.5823 3.5824 3.5825 3.5826 3.5827 3.5829 3.5830 3.5831 3 50 3.5832 3.5833 3.5834 3.5835 3.5837 3.5838 3.5839 3.5840 3.5841 3.5842 1 4 3.5843 3.5844 3.5846 3.5847 3.5848 3.5849 3.5850 3.5851 3.5852 3.5853 4 10 3.5855 3.5856 3.5857 3.5858 3.5859 3.5860 3.5861 3.5862 3.5864 3.5865 4 20 3.5866 3.5867 3.5868 3.5869 3.5870 3.5871 3.5873 3.5874 3.5875 3.5876 4 30 3.5877 3.5878 3.5879 3.5880 3.5882 3.5883 3.5884 3.5885 3.5886 3.5887 4 40 3.5888 3.5889 3.5891 3.5892 3.5893 3.5894 3.5895 3.5896 3.5897 3.5898 4 50 3.5899 3.5901 3.5902 3.5903 3.5904 3.5905 3.5906 3.5907 3.5908 3.5910 1 5 3.5911 3.5912 3.5913 3.5914 3.5915 3.5916 3.5917 3.5918 3.5920 3.5921 5 10 3.5922 3.5923 3.5924 3.5925 3.5926 3.5927 3.5928 3.5930 3.5931 3.5932 5 20 3.5933 3.5934 3.5935 3.5936 3.5937 3.5938 3.5940 3.5941 3.5942 3.5943 5 30 3.5944 3.5945 3.5946 3.5947 3.5948 3.5949 3.5951 3.5952 3.5953 3.5954 5 40 3.5955 3.5956 3.5957 3.5958 3.5959 3.5960 3.5962 3.5963 3.5964 3.5965 5 50 3.5966 3.5967 3.5968 3.5969 3.5970 3.5971 3.5973 3.5974 3.5975 3.5976 1 6 3.5977 3.5978 3.5979 3.5980 3.5981 3.5982 3.5984 3.5985 3.5986 3.5987 6 10 3.5988 3.5989 3.5990 3.5991 3.5992 3.5993 3.5994 3.5996 3.5997 3.5998 6 20 3.5999 3.6000 3.6001 3.6002 3.6003 3.6004 3.6005 3.6006 3.6008 3.6009 6 30 3.6010 3.6011 3.6012 3.6013 3.6014 3.6015 3.6016 3.6017 3.60i8 3.6020 6 40 3.6021 3.6022 3.6023 3.6024 3.6025 3.6026 3.6027 3.6028 3.6029 3.6030 6 50 3.6031 3.6033 3.6034 3.6035 3.6036 3.6037 3.6038 3.6039 3.6040 3.6041 1 7 3.6042 3.6043 3.6044 3.6046 3.6047 3.6048 3.6049 3.6050 3.6051 3.6052 7 10 3.6053 3.6054 3.6055 3.6056 3.6057 3.6058 3.6060 3.6061 3.6062 3.6063 7 20 3.6064 3.6065 3.6066 3.6067 3.6068 3.6069 3.6070 3.6071 3.6072 3.6073 7 30 3.6075 3.6076 3.6077 3.6078 3.6079 3.6080 3.6081 3.6082 3.6083 3.6084 7 40 3.6085 3.6086 3.6087 3.6088 3.6090 3.6091 3.6092 3.6093 3.6094 3.6095 7 50 3.6096 3.6097 3.6098 3.6099 3.6100 3.6101 3.6102 3.6103 3.6104 3.6106 1 8 3.6107 3.6108 3.6109 3.6110 3.6111 3.6112 3.6113 3.6114 3.6115 3.6116 8 10 3.6117 3.6118 3.6119 3.6120 3.6121 3.6123 3.6124 3.6125 3.6126 3.6127 8 20 3.6128 3.6129 3.6130 3.6131 3.6132 3.6133 3.6134 3.6135 3.6136 3.6137 8 30 3.6138 3.6139 3.6141 3.6142 3.6143 3.6144 3.6145 3.6146 3.6147 3.6148 8 40 3.6149 3.6150 3.6151 3.6152 3.6153 3.6154 3.6155 3.6156 3.6157 3.6158 8 50 3.6160 3.6161 3.6162 3.6163 3.6164 3.6165 3.6166 3.6167 3.6168 3.6169 1 9 3.6170 3.6171 3.6172 3.6173 3.6174 3.6175 3.6176 3.6177 3.6178 3.6179 9 10 3.6180 3.6182 3.6183 3.6184 3.6185 3.6186 3.6187 3.6188 3.6189 3.6190 9 20 3.6191 3.6192 3.6193 3.61941 3.6195 3.6196 3.6197 3.6198 3.6199 3.6200 9 30 3.6201 3.6202 3.6203 3.6204' 3.6206 3.6207 3.6208 3.6209 3.6210 3.6211 9 40 3.6212 3.6213 3.6214 3.6215 3.6216 3.6217 3.6218 3.6219 3.6220 3.6221 9 50 3.6222 3.6223 3.6224 3.6225 ' 3.6226 3.6227 3.6228 3.6229 3.6230 3.6231 TABLE IX. (LOGARITHMS OF SMALL ARCS IN SPACE OR TIME. i & 3 // 4 5 /( 6 7 // 8 9 l_ 1 II i h -io m - o s - 3.6232 3.6234 3.6235 3.6236 3.6237 3.6238 3.6239 3.6240 3.6241 3.6242 10 10 3.6243 3.6244 3.6245 3.6246 3.6247 3.6248 3.6249 3.6250 3.6251 3.6252 10 20 3.6253 3.6254 3.6255 3.6256 3.6257 3.6258 3.6259 3.6260 3.6261 3.6262 10 30 3.6263 3.6264 3.6265 3.6266 3.6268 3.6269 3.6270 3.6271 3.6272 3.6273 10 40 3.6274 3.6275 3.6276 3.6277 3.6278 3.6279 3.6280 3.628] 3.6282 3.6283 10 50 3.6284 3.6285 3.6286 3.6287 3.6288 3.6289 3.6290 3.6291 3.6292 3.6293 1 11 3.6294 3.6295 3.6296 3.6297 3.6298 3.6299 3.6300 3.6301 3.6302 3.6303 11 10 3.6304 3.6305 3.6306 3.6307 3.6308 3.6309 3.6310 3.6311 36312 3.6313 11 20 3.6314 3.6315 3.6316 3.6317 3.6318 3.6320 3.6321 3.6322 3.6323 3.6324 11 30 3.6325 3.6326 3.6327 3.6328 3.6329 3.6330 3.6331 3.6332 3.6333 3.6334 11 40 3.6335 3.6336 3.6337 3.6338 3.6339 3.6340 3.6341 3.6342 3.6343 3.6344 11 50 3.6345 3.6346 3.6347 3.6348 3.6349 3.6350 3.6351 3.6352 3.6353 3.6354 1 12 3.6355 3.6356 3.6357 3.6358 3.6359 3.6360 3.6361 3.6362 3.6363 3.6364 12 10 3.6365 3.6366 3.6367 3.6368 3.6369 3.6370 3.6371 3.6372 3.6373 3.6374 12 20 3.6375 3.6376 3.6377 3.6378 3.6379 3.6380 3.6381 3.6382 3.6383 3.6384 12 30 3.6385 3.6386 3.6387 3.6388 3.6389 3.6390 3.6391 3.6392 3.6393 3.6394 12 40 3.6395 3.6396 3.6397 3.6398 3.6399 3.6400 3.6401 3.6402 3.6403 3.6404 12 50 3.6405 3.6406 3.6407 3.6408 3.6409 3.6410 3.6411 3.6412 3.6413 3.6414 1 1,3 3.6415 3.6416 3.6417 3.6418 3.6419 3.6420 3.6421 3.6422 3.6423 3.6424 13 10 3.6425 3.6426 3.6427 3.6428 3.6429 3.6430 3.6431 3.6432 3.6433 3.6434 13 20 3.6435 3.6436 3.6437 3.6437 3.6438 3.6439 3.6440 3.6441 3.6442 3.6443 13 30 3.6444 3.6445 3.6446 3.6447 3.6448 3.6449 3.6450 3.6451 3.6452 3.6453 13 40 3.6454 3.6455 3.6456 3.6457 3.6458 3.6459 3.6460 3.6461 3.6462 3.6463 13 50 3.6464 3.6465 3.6466 3.6467 3.6468 3.6469 3.6470 3.6471 3.6472 3.6473 1 14 3.6474 3.6475 3.6476 3.6477 3.6478 3.6479 3.6480 3.6481 3.6482 3.6483 14 10 3.6484 3.6485 3.6486 3.6487 3.6488 3.6488 3.6489 3.6490 3.6491 3.6492 14 20 3.6493 3.6494 3.6495 3.6496 3.6497 3.6498 3.6499 3.6500 3.6501 3.6502 14 30 3.6503 3.6504 3.6505 3.6506 3.6507 3.6508 3.6509 3.6510 3.6511 3.6512 14 40 3.6513 3.6514 3.6515 3.6516 3.6517 3.6518 3.6519 3.6520 3.6521 3.6521 14 50 3.6522 3.6523 3.6524 3.6525 3.6526 3.6527 3.6528 3.6529 3.6530 3.6531 1 15 3.6532 3.6533 3.6534 3.6535 3.6536 3.6537 3.6538 3.6539 3.6540 3.6541 15 10 3.6542 3.6543 3.6544 3.6545 3.6546 3.6547 3.6548 3.6549 3.6549 3.6550 15 20 3.6551 3.6552 3.6553 3.6554 3.6555 3.6556 3.6557 3.6558 3.6559 3.6560 15 30 3.6561 3.6562 3.6563 3.6564 3.6565 3.6566 3.6567 3.6568 3.6569 3.6570 15 40 3.6571 3.6572 3.6572 3.6573 3.6574 3.6575 3.6576 3.6577 3.6578 3.6579 15 50 3.6580 3.6581 3.6582 3.6583 3.6584 3.6585 3.6536 3.6587 3.6588 3.6589 1 16 3.6590 3.6591 3.6592 3.6593 3.6593 3.6594 3.6595 3.6596 3.6597 3.6598 16 10 3.6599 3.6600 3.6601 3.6602 3.6603 3.6604 3.6605 3.6606 3.6607 3.6608 16 20 3.6609 3.6610 3.6611 3.6611 3.6612 3.6613 3.6614 3.6615 3.6616 3.6617 16 30 3.6618 3.6619 3.6620 3.6621 3.6622 3.6623 3.6624 3.6625 3.6626 3.6627 16 40 3.6628 3.6629 3.6629 3.6630 3.6631 36632 3.6633 3.6634 3.6635 3.6636 16 50 3.6637 3.6638 3.6639 3.6640 3.6641 3.6642 3.6643 3.6644 3.6645 3.6645 1 17 3.6646 3.6647 3.6648 3.6649 3.6650 3.6651 3.6652 3.6653 3.6654 3.6655 17 10 3.6656 3.6657 3.6658 3.6659 3.6660 3.6660 3.6661 3.6662 3.6663 3.6664 17 20 3.6665 3.6666 3.6667 3.6668 3.6669 3.6670 3.6671 3.6672 3.6673 3.6674 17 30 3.6675 3.6675 3.6676 3.6677 3.6678 3.6679 3.6680 3.6681 3.6682 3.6683 17 40 : 3.6684 3.6685 3.6686 3.6687 3.6688 3.6689 3.6689 3.6690 3.6691 3.6692 17 50 3.6693 3.6694 3.6695 3.6696 3.6697 3.6698 3.6699 3.6700 3.6701 3.6702 1 18 3.6702 3.6703 3.6704 3.6705 3.6706 3.6707 3.6708 3.6709 3.6710 3.6711 18 10 3.6712 3.6713 3.6714 3.6715 3.6715 3.6716 3.6717 3.6718 3.6719 3.6720 18 20 3.6721 3.6722 3.6723 3.6724 3.6725 3.6726 3.6727 3.6727 3.6728 3.6729 18 30 3.6730 3.6731 3.6732 3.6733 3.6734 3.6735 3.6736 3.6737 3.6738 3.6738 18 40 3.6739 3.6740 3.6741 3.6742 36743 3.6744 3.6745 3.6746 3.6747 3.6748 18 50 3.6749 3.6750 3.6750 3.6751 3.o752 3.6753 3.6754 3.6755 3.6756 3.6757 1 19 3.6758 3.6759 3.6760 3.6761 3.6761 3.6762 3.6763 3.6764 3.6765 3.6766 19 10 3.6767 3.6768 3.6769 3.6770 3.6771 3.6772 3.6772 3.6773 3.6774 3.6775 19 20 3.6776 3.6777 3.6778 3.6779 3.6780 3.6781 3.6782 3.6782 3.6783 3.6784 19 30 3.6785 3.6786 3.6787 3.6788 3.6789 3.6790 3.6791 3.6792 3.6792 3.6793 19 40 3.6794 3.6795 36796 3.6797 3.6798 3.6799 3.6800 3.6801 3.6802 3.6802 19 50 3.6803 3.6804 3.6805 3.6806 3.6807 3.6808 3.6809 3.6810 3.6811 3.6812 4:7 TABLE IX. LOGARITHMS OF SMALL ARCS IN SPACE OR TIME. Arc. i \ 3 // 4 1 5 ii 6 7 8 9 O i ,, lh. 20 m. Q S . 3.6812 3.6813 3.6814 3.6815 3.6816 3.6817 3.6818 3.6819 3.6820 36821 20 10 3.6821 3.6822 3.6823 3.6824 3.6825 3.6826 3.6827 3.6828 3.6829 3.6830 20 20 3.6830 3.6831 3.6832 3.6833 3.6834 3.6835 3.6836 3.6837 3.6838 3.6839 20 30 3.6839 3.6840 3.6841 3.6842 3.6843 3.6844 3.6845 3.6846 3.6847 3.6848 20 40 3.6848 3.6849 3.6850 3.6851 3.6852 3.6853 3.6854 3.6855 3.6856 3.6857 20 50 3.6857 3.6858 3.6859 3.6860 3.6861 3.6862 3.6863 3.6864 3.6865 3.6865 1 21 3.6866 3.6867 3.6868 3.6869 3.6870 3.6871 3.6872 3.6873 3.6874 3.6874 21 10 3.6875 3.6876 3.6877 3.6878 3.6879 3.6880 3.6881 3.6882 3.6882 3.6883 21 20 3.6884 3.6885 P.6886 3.6887 3.6888 3.6889 3.6890 3.6890 3.6891 3.6892 21 30 3.6893 3.6894 3.6895 3.6896 3.6897 3.6898 3.6898 3.6899 3.6900 3.6901 21 40 3.6902 3.6903 3.6904 3.6905 3.6906 3.6906 3.6907 3.6908 3.6909 3.6910 21 50 3.6911 3.6912 3.6913 3.6913 3.6914 3.6915 3.6916 3.6917 3.6918 3.6919 1 22 3.6920 3.6921 3.6921 3.6922 3.6923 3.6924 3.6925 3.6926 3.6927 3.6928 22 10 3.6928 3.6929 3.6930 3.6931 3.6932 3.6933 3.6934 3.6935 3.6936 3.6936 22 20 3.6937 3.6938 3.6939 3.6940 3.6941 3.6942 3.6943 3.6943 3.6944 3.6945 22 30 3.6946 3.3947 3.6948 3.6949 3.6950 3.6950 3.6951 3.6952 3.6953 3.6954 22 40 3.6955 3.6956 3.6957 3.6957 3.6958 3.6959 .3.6960 3.6961 3.6962 3.6963 22 50 3.6964 3.6964 3.6965 3.6966 3.6967 3.6968 3.6969 3.6970 3.6971 3.6971 1 23 3.6972 3.6973 3.6974 3.6975 3.6976 3.6977 3.6978 3.6978 3.6979 3.6980 23 10 3.6981 3.6982 3.6983 3.6984 3.6984 3.6985 3.6986 3.6987 3.6988 3.6989 23 20 3.6990 3.6991 3.6991 3.6992 3.6993 3.6994 3.6995 3.6996 3.6997 3.6998 23 30 3.6998 3.6999 3.7000 3.7001 3.7002 3.7003 3.7004 3.7004 3.7005 3.7006 23 40 3.7007 3.7008 3.7009 3.7010 3.7010 3.7011 3.7012 3.7013 3.7014 3.7015 23 50 3.7016 3.7017 3.7017 3.7018 3.7019 3.7020 3.7021 3.7022 3.7023 3.7023 1 24 3.7024 3.7025 3.7026 3.7027 3.7028 3.7029 3.7029 3.7020 3.7031 3.7032 24 10 3.7033 3.7034 3.7035 3.7035 37036 3.7037 3.7038 3.7039 3.7040 3.7041 24 20 3.7042 3.7042 3.7043 3.7044 3.7045 3.7046 3.7047 3.7048 3.7048 ! 3.7049 24 30 3.7050 3.7051 3.7052 3.7053 3.7054 3.7054 3.7055 3.7056 3.7057 3.7058 24 40 3.7059 3.7060 3.7060 3.7061 3.7062 3.7063 3.7064 3.7065 3.7065 3.7066 24 50 3.7067 3.7068 3.7069 3.7070 3.7071 37071 3.7072 3.7073 3.7074 3.7075 1 25 3.7076 3.7077 3.7077 3.7078 3.7079 3.7080 3.7081 3.7082 3.7083 3.70S3 25 10 3.7084 3.7085 3.7086 3.7087 3.7088 3.7088 3.7089 3.7090 3.7091 3.7092 25 20 3.7093 3.7094 3.7094 3.7095 3.7096 3.7097 3.7098 3.7099 3.7099 3.7100 25 30 3.7101 3.7102 3.7103 3.7104 3.7105 3.7105 3.7106 3.7107 3.7108! 3.7109 25 40 3.7110 3.7110 3.7111 3.7112 3.7113 3.7114 3.7115 3.7116 3.7116! 3.7117 25 50 3.7118 3.7119 3.7120 3.7121 3.7121 3.7122 3.7123 3.7124 3.7125 3.7126 1 26 3.7126 3.7127 3.7128 3.7129 3.7130 3.7131 3.7132 3.7132 3.7133! 3.7134 26 10 3.7135 3.7136 3.7137 3.7137 3.7138 3.7139 3.7140 3.7141 3.7142 3.7142 26 20 3.7143 3.7144 3.7145 3.7146 3.7147 3.7147 3.7148 3.7149 3.7150 3.7151 26 30 3.7152 3.7153 3.7153 3.7154 3.7155 3.7156 3.7157 3.7158 3.7159! 3.7159 26 40 3.7160 3.7161 3.7162 3.7163 3.7163 3.7164 3.7165 3.7166 3.7167 3.7168 26 50 3.7168 3.7169 3.7170 3.7171 3.7172 3.7173 3.7173 3.7174 3.7175 3.7176 1 27 3.7177 3.7178 3.7178 3.7179 3.7180 3.7181 3.7182 3.7183 3.7183 3.7184 27 10 3.7185 3.7186 3.7187 3.7188 3.7188 3.7189 3.7190 3.7191 3.7192 3.7192 27 20 3.7193 3.7194 3.7195 3.7196 3.7197 3.7197 37198 3.7199 3.7200 3.7201 27 30 3.7202 3.7202 3.7203 3.7204 3.7205 3.7206 3.7207 3.7207 3.7208 3.7209 27 40 3.7210 3.7211 3.7212 3.7212 3.7213 3.7214 3.7215 3.7216 3.7216 3.7217 27 50 3.7218 3.7219 3.7220 3.7221 3.7221 3.7222 3.7223 3.7224 3.7225 3.7226 1 28 3.7226 3.7227 3.7228 3.7229 3.7230 3.7230 3.7231 3.7232 3.7233! 3.7234 28 10 3.7235 3.7235 3.7236 3.7237 3.7238 3.7239 37239 3.7240 3.7241 3.7242 28 20 3.7243 3.7244 3.7244 3.7245 3.7246 3.7247 3.7248 3.7248 3.7249! 3.7250 28 30 3.7251 3.7252 3.7253 3.7253 3.7254 3.7255 3.7256 3.7257 3.7257 3.7258 28 40 3.7259 3.7260 3.7261 3.7262 3.7262 3.7263 3.7264 3.7265 3.7266 3.7266 28 50 3.7267 3.7268 3.7269 3.7270 3.7271 3.7271 3.7272 37273 3.7274 3.7275 1 29 3.7275 3.7276 3.7277 3.7278 3.7279 3.7279 3.7280 3.7281 3.7282 3.7283 29 10 3.7284 3.7284 3.7285 3.7286 3.7287 3.7288 3.7288 3.7289 3.7290 3.7291 29 20 3.7292 3.7292 3.7293 3.7294 3.7295 3.7296 3.7297 3.7297 3.7298 3.7299 29 30 3.7300 3.7301 3.7301 3.7302 3.7303 3.7304 3.7305 3.7305 3.7306 3.7307 29 40 3.7308 3.7309 3.7309 3.7310 3.7311 3.7312 3.7313 3.7313 3.7314 3.7315 29 50 3.7316 3.7317 3.7317 3.7318 3.7319 3.7320 3.7321 3.7322 3.7322 ! 3.7323 TABLE X. LOGARITHMS OF SMALL ARCS IN SPACE OR TIME. ,- Arc. d it 2 3 21 m July 5 +0.95 .95 .96 .96 .96 .95 .95 .95 Oct. 3 0.40 .44 .48 .52 .55 .58 .61 .63 6 0.95 .95 .94 .94 .94 .93 .93 .92 4 0.66 .68 .70 .72 .74 .76 .77 .79 7 0.91 .91 .90 .89 .88 .87 .86 .85 5 0.80 .82 .83 .84 .86 .87 .88 .89 8 0.84 .83 .81 .80 .78 .76 .75 .73 6 0.90 .91 .92 0.93 0.94 0.95 0.96 0.96 9 0.70 .68 .66 .63 .60 0.57 0.53 0.49 7 0.97 .98 .98 0.99 1.00 1.00 1.01 1.02 10 +0.44 .39 .38 .25 .16 0.04 9.86 9.54 13 +0.84 .83 .82 0.81 0.80 0.78 0.77 0.76 16 0.47 .52 .56 .60 .63 0.66 0.68 0.70 14 0.74 .72 .71 .69 .67 .64 .62 .59 17 0.72 .74 .76 .77 .79 .80 .81 .82 15 +0.56 .53 .50 .46 .42 .37 .31 .25 18 0.83 .84 .85 .86 .86 .87 .88 .88 17 9.98 .10 .20 .28 .34 .40 .45 .50 19 0.89 .89 .90 .90 .90 .91 .91 .91 18 0.54 .58 .61 .64 .67 .70 .73 .75 20 +0.91 .91 .91 .91 .91 .91 .91 .91 19 0.77 .79 .81 .83 .85 .86 .88 .89 21 0.91 .91 .90 .90 .90 .89 .89 .88 20 0.91 .92 .93 .94 .96 .97 .98 .99 22 0.88 .87 .86 .85 .85 .84 .83 .82 30 9.99 .10 .18 .25 .31 .36 .41 .45 23 0.80 .79 .78 .76 .75 .73 .71 .69 31 0.49 .52 .55 .58 .61 .63 .65 .68 24 0.67 .64 .62 .59 .55 .52 .47 .42 Nor. 1 0.70 .72 .73 .75 .77 .78 .79 .81 Aug. 1 +0.91 .92 .92 .93 .93 .93 .94 .94 2 0.82 .83 .84 .85 .86 .87 .88 .89 2 0.94 .94 .94 .94 .93 .93 .93 .92 3 0.90 .91 .91 .92 .93 .93 .94 .94 3 0.92 .91 .91 .90 .90 .89 .88 .87 4 0.95 .95 .96 .96 .96 .97 .97 .97 4 0.86 .85 .86 .83 .82 .80 .79 .77 5 0.98 .98 .98 .98 .98 .98 .98 .98 5 0.76 .74 .72 .70 .68 .66 .63 .61 6 0.98 .98 .98 .98 .98 .97 .97 .97 6 +0.58 .55 .51 .47 .43 .38 .83 .27 12 +0.53 .48 .43 .37 .31 .23 .14 .02 8 9.93 .07 .17 .26 .33 .39 .45 .50 14 0.28 .35 .41 .46 .50 .54 .58 .61 9 0.54 .58 .62 .66 .69 .72 .75 .78 15 0.64 .67 .76 .72 .74 .77 .79 .80 15 +0.79 .81 .82 .83 .84 .85 .86 .86 16 0.82 .84 .85 .87 .88 .89 .90 .91 16 0.87 .87 .88 .88 .88 .89 .89 .89 17 0.92 .93 .94 .95 .96 0.96 0.97 0.97 17 +0.89 .89 .89 .89 .89 .88 .88 .88 18 0.98 0.98 0.99 0.99 0.99 1.00 1.00 1.00 18 0.88 .87 .87 .86 .86 .85 .84 .84 19 1.00 1.00 1.00 1.00 1.00 1.00 0.99 0.99 19 0.83 .82 .81 .80 .79 .78 .76 .75 27 0.06 0.16 0.24 0.31 0.36 0.41 .45 .49 20 0.73 .72 .70 .68 .66 .64 .61 .58 28 0.53 .56 .59 .62 .64 .66 .68 .70 21 +0.55 .52 .48 .44 .40 .34 .28 .20 29 0.72 .73 .75 .76 .78 .79 .80 .82 23 0.17 .27 .35 .42 .48 .53 .58 .63 30 0.83 .84 .85 .86 .86 .87 .88 .89 30 +0.92 .92 .92 .91 .91 .91 .90 .90 Dec. 1 0.89 .90 .91 .91 .92 .92 .93 .93 31 0.89 .88 .87 .87 .86 .85 .84 .82 2 0.93 .94 .94 .94 .94 .95 .95 .95 Sept. 1 0.81 .70 .78 .77 .75 .74 .72 .70 3 0.95 .95 .95 .95 .95 .95 .94 .94 2 0.67 .65 .63 .60 .57 .54 .51 .47 4 0.94 .94 .93 .93 .93 .92 .92 .91 3 +0.43 .38 .33 .27 .20 .12 .02 .88 5 0.90 .90 .89 ,88 .87 .86 .85 .84 5 0.24 .31 .36 .41 .46 .50 .53 .57 6 0.82 .81 .79 .77 .75 .73 .70 .67 6 0.60 .63 .65 .68 .70 .73 .75 .77 12 0.38 .44 .49 .54 .58 .62 .65 .68 7 0.79 .81 .83 .84 .86 .88 .89 .71 13 0.71 .73 .75 .77 .79 .81 .83 .84 13 +0.83 .84 .85 .85 .86 .86 .86 .87 14 0.86 .87 .88 .89 .90 .91 .92 .93 14 +0.87 .87 .87 .86 .86 .86 .86 .85 15 0.93 .94 .95 .95 .96 .96 .96 .97 15 0.85 .84 .83 .83 .82 .81 .80 .79 16 0.97 .97 .97 .97 .97 .97 .97 .97 16 0.78 .77 .75 .74 .72 .71 .69 .67 17 0.97 .96 .96 .96 .95 .95 .94 .94 17 0.65 .63 .60 .58 .55 0.52 0.48 0.44 18 0.93 .92 .91 .90 .89 .88 .87 .86 18 +0.40 .35 .29 .22 .14 0.03 9.89 9.67 27 0.72 .73 .75 .76 .78 .79 .80 .81 20 0.39 .44 .49 .54 .58 0.62 0.65 0.69 28 0.83 .84 .84 .85 .86 .87 .88 .88 21 -0.71 .74 .77 .79 .82 .84 .86 .88 29 0.89 .89 .90 .90 .91 .91 .91 .92 29 +0.77 .75 .74 .72 .70 .68 .65 .63 30 0.92 .92 .92 .92 .93 .93 .93 .93 30 +0.60 0.57 0.54 0.50 .46 .42 .37 .32 31 0.93 .92 .92 .92 .92 .92 .91 .91 Oct. 2 9.58 9.81 9.97 0.08 .16 .24 .30 .35 60 TABLE XII. For finding the valtre of N for correcting lunar distances for the compression of the earth. TABLE XII. A. giving 1st Part of N. TABLE XII. B. giving 2d Part of N. ADD J)'s Declination. App. j|C's Declination. A^JJ. Dist. 3 o 1 12 15 ft il 24 27 30 Dist. o I 6 o 9 12 o 15 18 21 & c 27 30 20 o 20 4-0 i II 1 a 10 // 14 i? 26' // 24 27 // 30 II 33 Si 6 10 13 16 19 22 25 28 31 22 3 6 9 12 14 17 20 23 25 28 22 3 6 9 13 16 19 22 29 27 30 24 3 5 8 11 13 16 18 21 23 25 24 a 6 9 12 14 17 20 23 25 28 26 2 5 7 10 12 14 17 19 21 23 26 3 5 8 11 13 16 18 21 23 26 28 2 4 7 9 11 13 15 17 19 21 28 3 5 8 1C) 12 15 17 20 22 24 30 2 4 6 8 10 12 14 16 18 20 30 4-0 2 5 7 9 12 14 16 18 21 23 32 2 4 6 8 9 11 13 15 16 18 32 2 4 7 9 11 13 15 17 19 21 34 2 4 5 7 y 10 12 14 15 17 34 2 4 6 8 11 13 15 10 18 20 36 2 3 5 7 8 10 11 13 14 16 36 2 4 6 8 10 12 14 10 17 19 38 2 3 6 8 9 10 12 13 14 38 2 4 6 8 10 11 13 15 17 18 ; 40 1 3 4 6 7 8 10 11 12 13 40 4-0 2 4 6 7 9 11 13 14 16 18 42 1 3 4 5 7 8 9 10 11 13 42 2 4 5 7 9 10 12 14 is 17 , 44 1 2 4 5 6 7 8 10 11 12 44 2 3 5 7 8 10 12 13 15 16 46 1 2 3 5 6 7 8 9 10 11 46 2 3 5 6 8 10 11 ia 14 16 48 1 2 3 4 5 6 7 8 9 10 48 2 3 5 6 8 9 11 12 14 15 50 2 a 4 5 6 7 8 9 10 50 4-0 2 3 5 6 8 9 11 12 ia 15 52 2 3 4 5 5 6 7 8 9 52 2 3 4 6 7 9 10 12 13 14 i 54 2 3 3 4 5 6 7 7 8 54 1 3 4 6 7 9 10 11 13 14 | 56 2 2 3 4 5 5 6 7 8 56 1 3 4 6 7 8 10 11 i a 14 | 58 1 2 3 4 4 5 6 6 7 58 1 3 6 7 8 10 11 H 13 , 60 1 2 3 3 4 5 5 6 7 60 4-0 3 5 7 8 9 11 12 13 !' 62 1 2 3 3 4 4 5 5 6 62 3 5 7 8 9 10 \-> 13 ; 64 1 2 2 3 3 4 4 5 6 64 3 5 7 8 9 10 11 13 66 1 2 2 3 3 4 4 5 5 66 3 5 6 8 9 10 11 12 : 68 1 2 2 3 3 4 4 5 68 3 5 6 8 9 10 11 12 ; 70 1 2 2 3 3 3 4 4 70 4-0 3 4 B 6 7 9 10 11 12 ! 72 ] 2 2 2 3 3 3 4 72 2 4 5 6 7 9 10 11 12 i 74 1 1 2 2 2 3 3 3 74 2 4 5 6 7 8 10 11 12 76 1 1 1 2 2 2 3 3 76 2 4 5 6 7 8 9 11 12 78 1 1 1 1 2 2 2 2 78 2 4 5 6 7 8 9 11 12 80 1 1 1 1 1 2 2 2 80 4-0 2 4 5 6 7 8 9 10 11 i 82 1 1 1 1 1 ] 2 82 2 4 5 6 7 8 9 10 11 84 1 1 1 1 1 1 84 2 4 5 6 7 8 9 10 11 86 1 1 1 1 86 2 4 5 6 7 8 9 10 11 88 88 2 4 5 6 7 8 9 10 11 90 90 4-0 2 4 5 6 7 8 9 10 11 92 +0 92 2 4 5 6 7 8 9 10 ll ; 94 1 1 1 1 94 2 4 5 6 7 8 9 10 11 i 96 1 1 1 1 1 1 96 2 4 5 6 7 8 9 10 11 1 98 1 1 1 1 1 1 2 98 2 4 5 6 7 8 9 10 11 100 +0 1 1 1 1 2 2 2 100 4-0 2 4 5 6 7 8 9 10 11 102 1 1 1 2 2 2 2 102 2 4 5 6 7 8 9 11 12 104 1 I 2 2 2 3 3 104 2 4 5 6 7 8 9 11 12 106 1 2 2 2 3 3 3 106 2 4 5 6 7 8 ]() !1 12 ' 108 2 2 2 3 3 3 4 108 2 4 5 6 7 9 10 11 12 110 +0 1 2 2 3 3 3 4 4 110 4-0 3 4 5 6 7 9 10 11 12 112 1 2 2 3 3 4 4 5 112 3 4 5 6 8 9 10 11 12 114 1 2 2 3 3 4 4 5 5 114 3 4 5 6 8 9 10 11 12 116 1 2 2 3 3 4 4 5 6 116 3 4 5 7 8 9 10 11 13 118 1 2 3 3 4 4 5 5 6 118 3 4 5 7 8 9 10 12 13 120 +0 1 1 2 3 3 4 5 5 6 7 120 4-0 1 3 4 5 7 8 9 11 12 13 122 1 1 2 3 4 4 5 6 6 7 122 1 3 4 6 7 8 10 11 12 13 124 1 2 2 3 4 5 5 6 7 8 124 1 3 4 6 7 8 10 11 12 14 126 1 2 a 3 4 5 6 7 7 8 126 1 3 4 6 7 9 10 11 i a 14 128 1 2 3 4 5 5 6 7 8 9 128 2 3 4 6 7 9 10 12 13 14 130 +0 1 2 3 4 5 6 7 8 9 10 130 4-0 2 3 5 6 8 9 11 12 13 15 The signs in the column apply to all the numbers in the same line, and are to be used when the declination is North. When the declination is South,, change the sign + to and to +. 61 IMPROVED METHOD OF FINDING THE 3RROR AND HATE OF A CHRONOMETER BY EQUAL ALTITUDES. FROM THE APPENDIX TO THE AMERICAN EPHEMERIS AND NAUTICAL ALMANAC FOR 1866. METHOD OF FINDING THE ERROR AND RATE OF A CHRONOMETER BY EQUAL ALTITUDES. To regulate a chronometer to Greenwich time, we must determine its error and rate at a place whose longitude is well known. The most accurate method of doing this is by observing the transit of the sun or a star over the meridian. For the nav- igator, the most simple and accurate substitute for the meridian observation is that cf equal altitudes of the same object on each side of the meridian. In the case of a star, the mean of the two chronometer times corresponding to the equal altitudes is the chronometer time of transit ; but in the case of the sun, the mean of these times differs somewhat from the time of transit, since, in consequence of the change of the sun's declination between the observations, the equal altitudes do not occur at equal intervals before and after the transit. The small correction necessary, when the sun is observed, to reduce the mean of the times to the time of transit, is called the Equation of Equal Altitudes. The method of computing this equation given below is based upon that first given by GAUSS (Monatliche Correspondenz, Vol. XXIII. ). We do not, however, follow him in using the doable daily change of declination, or difference between the sun's declination on the noon preceding and the noon following that of the observation ; but prefer to use the hourly difference, because this may be obtained directly from the American Ephemeris, and is at the same time even more accurate. We also extend our table so as to meet the case where one altitude is taken in the afternoon and the corresponding equal altitude on the following morning ; in which case, the equation is computed for apparent midnight.* * It should be observed, as a caution to navigators, that the rule for computing the equation for mid- night is sometimes inaccurately, or incompletely, stated in works on navigation or astronomy. The rule in Lieut. RAPER'S Practice of Navigation is wholly erroneous. GALBRAITH'S rule (Mathematical and Astronomical. Tables) is incomplete, in not noticing the case where the elapsed time is less than 12^. His rule for computing the equation for noon is similarly defective, in not noticing the case where the elapsed time is greater than 12 h *. In Professor INMAN'S rule there is a slight inaccuracy introduced, by taking the equation of time for mean, instead of apparent noon or midnight ; and in all the books, 9 65 EQUAL ALTITUDES. L EQUAL ALTITUDES OF THE SUN, MORNING AND EVENING. THE OBSERVATION. On shore, at a place whose longitude is accurately known, and whose latitude is approximately known, observe with an artificial horizon the same altitude both in the morning and in the afternoon, as near the prime vertical as convenient after the alti- tude is more than 10, noting the times by the chronometer. In low latitudes, how- ever, the method of equal altitudes will often give very accurate results, even when the observations are quite near to the meridian. In general, a sufficiently accurate result may be obtained if the observations are taken when the sun's change of altitude is not less than 10" in 0"-.5, or when the change in the double altitude taken with the artificial horizon is not less than 20" in s .5. It is most convenient, as well as conducive to accuracy, to take the observation in the following manner. In the morning, bring the lower limb of the sun, reflected from the sextant-mirrors, and the upper limb of that reflected from the mercury, into approximate contact ; move the of the vernier forward (say from 10' to 20'), and set it on a division of the limb ; the images will be overlapped and will be separating ; wait for the instant of contact ; note it by chronometer, and immediately set the ver- nier on the next division of the limb, that is, 10' in advance ; note the instant of con- tact again, and proceed in the same manner for as many observations as are thought necessary. If the sun rises too rapidly, let the intervals on the limb be 20'. Find (roughly) the time when the sun will be at the same altitude in the afternoon, and just before that time set the vernier on the last altitude noted in the morning (of course using the same sextant) ; the images of the sun will be separated, but will be approaching ; wait for the instant of contact ; note it by chronometer ; set the vernier back to the next division of the limb (10' or 20', as the case may be) ; note the con- tact again, and so proceed till all the A. M. altitudes have been again noted as P, M. altitudes. THE COMPUTATION. Take the mean of the A. M. times and call it the A. M. Chronometer Time. The mean of the P. M. times call the P. M. Chronometer Time. If, instead of noting the times by the chronometer, a watch is used (compared with the chronometer both before and after each observation), it will generally be found necessary to make an allowance for its gain or loss on the chronometer, so as to obtain the exact difference between the watch and chronometer at the instant of observation. This difference being applied to the mean of the watch times, we have the mean chronometer time the same as would have been found by employing the chronometer directly. the methods given of taking out the sun's change of declination, whether for 48 ht or for 24 h> , are not as accurate as they should be. A perfectly accurate rule, with a special table, for the midnight correction, is given in SCHUMACHER'S Hvlfstafeln (Ed. by WAKNSTORFF). It requires, however, one logarithm more than our method in the text, and is otherwise not so simple. 66 EQUAL ALTITUDES. The half sum of the A. M. and P. M. Chronometer Times is the Middle Chronom- eter Time, their difference is the Elapsed Time; observing that when the A. M. time is before 12 h by chronometer, while the P. M. time is after 12 h -, the latter must be supposed to be increased by 12 h in finding this half sum and difference. Take from the Nautical Almanac the sun's declination, the hourly difference of decimation, and the equation of time, reducing each to the instant of local apparent noon by applying the changes for the longitude. Mark north latitude and north declination +- " south latitude and south declination " hourly diff. of decl. when towards north + " hourly diff. of decl. when towards south . Enter Table I. with the elapsed time, and take out log. A and log. B, prefixing to each its proper sign given in the table at the head of the page. To log. A add the log. of the hourly diff, Table II., and the log. tangent of the latitude (Bowditch, Table XXVII.). Prefix to each log. the sign of the quantity it represents and to their sum the sign which results from the algebraic combination of the three signs.* This sum is the log. (Table II.) of the number of seconds of time in the first part of equation of equal attitudes, to be marked -f- or like its log. To log. B. add the log. of the hourly diff. and the log. tangent of the declination, marking the signs as before. The sum is the log. of the second part of the equation of equal altitudes, to be marked H- or like its log. Apply the two parts of the equation, according to their signs, to the Middle Chro- nometer Time ; the result is the Chronometer Time of Apparent Noon. To this apply the equation of time (adding, when the equation of time is additive to mean time, otherwise subtracting) ; the result is the Chronometer Time of Mean Noon, which, if the chronometer is regulated to local time, will be 12 h O m> s - when the chronometer is- right ; more than 12 ht when fast, less than 12 h< when slow. If the chronometer is regulated to Greenwich time, apply the longitude (in time) to the chronometer time of mean noon (subtracting in west, adding in east) ; the result will be more or less than 12 h , according as the chronometer is fast or slow. Repeat this process on a subsequent day. The difference between the chronome- ter errors on the two days, divided by the number of days in the interval, is the daily rate of the chronometer, gaining or losing according as the chronometer goes too fast or too slow. EXAMPLE 1. May 3d, 1856. At the United States Naval Academy, Lat. 38 59' N., Long. 5 h * 5 m - 55* .1 W., suppose the following observations of equal altitudes to be taken with an artificial horizon. Required the error of the chronometer on Greenwich time at noon of that day ? * The algebraic rule being, that, when there is an odd number of factors with the sign minus, the result must have the sign minus, otherwise the sign plus. In the present application of this rule, when there is either one or three of the logs, marked , their sum must be marked j otherwise 4-. 67 EQUAL ALTITUDES. A.M. Comparisons. h. m. 8. Ohronom. 12 52 0.0 Watch 7 45 8.0 Diff. 5 6 52.0 A. M., watch gains l':5 in 28 m * Interval to obs. 17 m %5 28 m. . 17 m. <5 __ p. 5 . os%9 P. M., watch gains 2'-.2 in 34 m - Interval to obs. 21 m< 34 m. . 21 m. _ 2 s. >2 : is.,4 2 O Art. Hor. o t 65 50 66 66 10 (Eq. T.) "'iS-ll 0.258 1.32 5.1 P.M. Comparisons, h. m. a. Chronom. 8 37 0.0 Watch 3 30 31.3 Diff. 5 6 28.7 Chronom. 9 11 0.0 Watch 4 4 33.5 Chronom. 1 20 0.0 Watch 8 13 9.5 Diff. 5 6 50.5 Diff. 5 6 26.5 Watch A. M. h. m. 8. 829. 8 2 35.5 8 3 0.5 Watch P. M. h. m. s. 3 52 10.7 3 51 44.0 3 51 18.5 Mean 8 2 35.0 Comparison 5 6 51.1 Mean 3 51 44.4 Comparison 5 6 27.3 P. M. Chro. Time 8 58 11.7 A. M. Chro. Time 1 9 26.1 Elapsed Time 7 48 45.6 * V A. M. Chro. Time 1 9 26.1 P. M. Chro. Time 8 58 11.7 2)10 7 37.8 Eq. T. 3 19.43 1.32 (D.) +15 48 50.5 (H. D.) +43.82 3 42.8 0.14 Middle Chro. T. 53 48.9 Equat. of Eq. Alts. 8.8 Chro. T. App. N. 5 3 40.1 Equat. of Time H-3 19.4 Decrease in 5.1 = 0.14 log. B. Tab. I. +9.201! +1 6403 D. +155233.3 H. D. +43.68 5.1 Chro. T. Mean N. 5 6 59.5 Longitude 5 5 55.1 W. 222.8 log.A.Tab.I. 9.4846 H.D.+43".68 log. Tab. II. +1.6403 Lat. + 38 59' log. tan. +9.9081 Chro./orf 1 4.4 D. + 15 53' log. tan. +9.4542 1st Pt. Eq. 10*-.79 log. 1.0330 2d Pt. Eq. + l f -.98 log. +0.2956 By similar observations on May 15th, suppose the chronometer is found to be fast I2 \5; we have May 3d, fast May 15th, fast Loses in 12 days Daily rate 4.4 12.5 _51.9 ~4.33~ losing. H. EQUAL ALTITUDES OF THE SUN, EVENING AND MORNING. THE OBSERVATION. Take a set of altitudes, in the manner already explained, in the afternoon of one day, and the same altitudes in reverse order on the morning of the next, noting the times by the chronometer, or by a watch compared with it. THE COMPUTATION. The half sum of the P. M. and A. M. Chronometer Times is the Middle Chronom- eter Time ; their difference is the Elapsed Time ; observing that when the P. M. time is before 12 h by chronometer, while the A. M. time is after 12 h , the latter must be supposed to be increased by 12 h - in finding this half sum and this difference. Take from the Nautical Almanac the sun's declination, the hourly difference of declination, and the equation of time, reducing them each to the instant of local flp- parent midnight. 68 EQUAL ALTITUDES. Mark the sign of each quantity as before, and compute the two parts of the equa- tion of equal altitudes precisely as in the preceding case, observing to mark the signs of log. A and log. B as given in the table for midnight. Apply the two parts of the equation to the middle chronometer time, according to their signs ; the result is the Chronometer Time of Apparent Midnight. To this apply the equation of time (adding, when the equation of time is additive to mean time, otherwise subtracting) ; the result is the Chronometer Time of Mean Midnight, which, if the chronometer is regulated to local time, will be 12 hi O ra O" 1 when the chronometer is right ; more than 12 hl when fast ; less than 12 h> when slow. If the chronometer is regulated to Greenwich time, apply the longitude, in time, to the chronometer time of mean midnight (subtracting in west, adding in east) ; the re- sult will be more or less than 12 h> (or 24 h- ) according as the chronometer is fast or slow. A repetition of this process at a subsequent day will give another error, whence the rate will be found as before. Or the rate may be found by comparing the results of an A. M. P. M., and a P. M. A. M. observation, remembering that the interval elapsed between two such observations is equal to the difference between the two dates plus or minus half a day. EXAMPLE 2. May 3d, 1856, Lat. 43 21' S., Long. 9 h - 50 m - 8 s - E., suppose the altitude of the sun to be observed in the afternoon and the same altitude again on the morning of the 4th, as below. Required the error of the chronometer on Greenwich time at mid- night of the 3d ? Chronom., P. M. 2 Art. Hor. Chronom., A. M. 6 h. 54 m. 10 s. 3 ~3 8 o Q, gh. 9 m. 17 s. 5 The A. M. time must be called 21 h - 9 m 17 8> .5. The Greenwich time of midnight for which the declination, &c. must be found, is May 3 d - 2 h - 9 m> 52 s - (= 3 d - 2 h .16.). P. M. Chro. T. 6' 54 H).3 A.M. Chro. T. 21 9 17.5 m s. s. (Eq. T.) 3 18.11 0.258 0.56 2.15 h. m. s. A. M. Chro. T. 21 9 17.5 P. M. Chro. T. 6 54 10.3 2)28 3 27.8 Eq.T. 3 18.67 0.56 (D.) +15 48 50.5 (H. D.) +43.82 1 34.1 0.06 Elapsed T. 14 15 7.2 h. Decrease in 24.0 = 0.66 Decrease in 2.16 = 0.06 log. B. Tab. I. 9.1586 . . . . . +1 6411 Middle Chro. T. 14 1 43.9 Eq. of Eq. Alts. 22.3 Chro.T.App.Midn. 14 1 21.6 Eq. of Time -1-3 18.7 D. +15 50 24.6 H. D +43.76 2.15 Chro.T.M'n Midn. 14 440.3 Longitude 9 50 8.0 E. 23 54^48.3 24 0.0 94.1 log.A.Tab.L +9.6958 H.D.+43".76 log. Tab. II. +1.6411 Lat, 43 21' log. tan. 9.9750 1st Pt. Eq. 20*-.51 log. T.s!l9 Chronom. slow 5 1 1 .7 D + 15 50' log. tan. +9.4527 2dPt.Eq. P-.79 log. (X2524 By an A. M. P. M. observation on May 20th, suppose this chronometer is found to be slow 8 m - 14 8> ,6 ; we have d. h. m. s. May 3 12 slow 5 11.7 May 20 slow 8 14.6 Loses in 16 d -.5 ~3~2.9~ Daily rate 69 11.09 losing. EQUAL ALTITUDES. III. EQUAL ALTITUDES OF A FIXED STAR. THE OBSERVATION. In selecting stars for this observation, it is to be observed that the nearer the zenitri the star passes, the less may the elapsed time be ; and when the star passes exactly through the zenith, the two altitudes may be taken within a few minutes of each other. But with the ordinary sextants, altitudes near 90 cannot be taken with the artificial horizon, as the double altitude is then nearly 180. The prismatic sextants, or still better, the prismatic circles of Pistor and Martin, are adapted for measuring angles of all magnitudes up to 180, and are therefore especially suitable for this ob- servation. Set the sextant and wait for the coincidences of the two images of the star, as in the case of the sun's limb, noting the times by chronometer or watch. THE COMPUTATION. Take the mean of the times before the meridian passage as the A. M. Chronome- ter Time, and the mean of those after the meridian passage as the P. M. Chronome* ter Time. The mean of the A. M. and P. M. Chronometer Times is the Chronometer Time of Star's Transit. This time, if the chronometer is right, will agree with the true mean time of star's transit, which is to be computed as follows. To the right ascension of the star apply the longitude of the place of observation (adding in west, subtracting in east) ; the result is the Greenwich Sidereal Time of Star's Transit, from which subtract the sidereal time at the preceding mean noon Greenwich (Nautical Almanac, page II. of the month) ; the remainder is the Sidereal Interval since mean noon. From Table IV. with the argument Sidereal Interval, take out the correction, which subtract from the sidereal interval ; the remainder is the Greenwich Mean Time of the Star's Transit. The chronometer time will be more or less than this according as the chronometer is fast or slow. If the chronometer is regulated to local time, apply the longitude to the Greenwich mean time of star's transit (subtracting in west, adding in east) ; the result is the Local Mean Time of Star's Transit, and the chronometer is fast or slow according as it shows more or less than this time. EXAMPLE 3. July 15th, 1856, at the Cape of Good Hope, Lat. 33 56' S., Long. l h - 13 re - 56 s - E., observed equal altitudes of Antares as follows : 70 EQUAL ALTITUDES. Chronom. A. M. 2 Alt. Antares. Chronom. P. M h- m. 8. o i h. m. s 5 32 10.5 125 30 9 34 20.3 5 32 35.0 40 9 33 56.0 5 32 59.3 50 9 33 32.0 A. M. Chr.. T. 5 32 34.9 . P. M. wnro. T. 9 33 56.f P. M. Chro. T. 9 33 56.1 2 ) 15 6 31.0 Antares R. A, 16 20 37.58 Chro. T. # Transit 7 33 15.5 Longitude 1 13 56.00 E Gr. T. * Transit 7 31 22.1 Gr. Sid. T. 15 641.58 Chro. fast 1 53.4 July 15, Gr. Sid. T. Mean Noon 7 34 5.25 Sid. Interval 7 32 36.33 Correction, Table IV. 1 14.15 Gr. M. T. >fc Transit 7 31 22.18 IV. TO CORRECT FOR SMALL INEQUALITIES IN THE ALTITUDES Although the sextant readings are the same at the A. M. and P. M. observations, it may happen that neither the true nor even the apparent altitudes are the same. 1st. Supposing the sextant to remain unchanged, the atmospheric refraction may be different at the two observations in consequence of changes in the density and tem- perature of the air as shown by the barometer and thermometer. In this case, the apparent altitudes are equal, but the true altitudes are not so. 2d. The sextant may be affected by changes of temperature, particularly in day observations in the sun, so as to make the sextant readings the same for apparent altitudes slightly different. I do not think these changes in the sextant are to be eliminated by determining the index error at each observation, as has been supposed by some, since it is quite pos- sible that the expansion and contraction of the various parts might leave the index correction unchanged while it affected the readings of the altitudes, or the reverse. The only course appears to be to guard the instrument as much as possible from changes of temperature, exposing it to the sun's rays only during the few minutes re- quired for fiach observation. But the correction for changes of refraction may be satisfactorily made as follows. Note the barometer and thermometer both A. M. and P. M. ; take out the correspond- ing refractions for each observation from Tables III., III. A., and III. B., and find the difference of these refractions. Also take the difference between any two sextant readings and the difference between the two corresponding chronometer times. Then the correction of either noon or midnight will be found by the following proportion. The difference of the sextant readings is to the difference of the refractions as the dif- ference of the chronometer times is to the renuired correction. Apply this correction to the Chronometer Time of Noon or Midnight (obtained by the preceding rules) as follows : add it when the A. M. refraction is the greater ; subtract it when the P. M. refraction is the greater. The result is the true Chronom- eter Time of Noon or Midnight. EXAMPLE. Suppose, in Example 1, we have in the morning, Barometer 30 inches, Thermometer 55 ; in the afternoon, Barometer 29.5 inches, Thermometer 85. The apparent altitude of sun's lower limb 33 0' ; the apparent altitude of sun's centre 33 16'. We have 71 EQUAL ALTITUDES. A M. P. M. Mean refraction 1 29 Mean refraction 1 29 Barom. 30 in. Barorn. 29.5 in. 1 Therm. 55 1 Therm. 85 6 True refraction 1 28 True refraction 1 22 Then the difference of the sextant readings is 10' (=600") and the corresponding diff. of chronometer times is about 26* ; whence II U 8. B 600 : 6 = 26 : 0.26 h. m. B. The (approximate) Chronometer Time of Mean Noon was found to be 5 6 59.5 Correction for change of refraction -1-0.3 True Chronometer Time of Mean Noon 5 6 59.8 NOTE. This correction may be found by the following rule, which we should have to resort to when but one altitude was taken at each observation. Add together the log. of the diff. of refractions (Tab. II.), log. cosine of the altitude, log. secant of the latitude, log. secant of the declination, log. cosecant of half elapsed time (or if the elapsed time is greater than 12 h> , half its supplement to 24 h '), and the constant log. 8.523 ; the sum is the log. (Table II.) of the required correction. Thus in the preceding example we have Diff.refr. 6" log. 0.778 Alt. 33 16' log. cos. 9.922 Lat. 38 59' log. sec. 0.109 Dec. 15 53' log. sec. 0.017 El. T. 7 h - 49 m> log. cosec.* 0.069 const, log. 8.523 Correction 8 \26 log. 9.418 DEGREE OF DEPENDENCE. An error of 5' in the latitude would not affect the corresponding part of the equa- tion of equal altitudes by more than one hundredth of its amount in the most unfavor- able case, and in general would have no sensible effect. It is one of the advantages of the equal altitude method, therefore, that it does not require an accurate knowledge of the latitude. It is also plain that errors in the longitude affecting the declination and its hourly difference produce but small proportionate effects upon the computed equation. The absolute error of the chronometer on Greenwich will be affected by the whole error in the longitude, but the rate will still be correct. Hence we con- clude that by this method the chronometer may be accurately rated at a place whose latitude and longitude are both imperfectly known. The chief source of error is in the observation itself. The most practised observers with the sextant cannot depend on the noted time of a single contact within 0" .5, and hence the intervals between the successive chronometer times (which, if observations could be perfectly taken would be sensibly equal) may differ 2" . But the greatest probable error of the chronometer time of sun's or star's transit, from the mean of six such observations on each side of the meridian, is found to be not more than s -. 2, provided the rate of the chronometer between the observations is uniform. Errors resulting from changes in the refraction may be almost wholly removed by computation as above. * Enter BOWDITCH'S Table XXVII., column P. M., with the whole elapsed time and take out the corresponding cosecant. 72 EXPLANATION OF THE TABLES TABLE I. Logarithms of A and B, for computing the Equation of Equal Alfo tudes, are calculated by the formulas A -= E R - _E 1800 sin i E ' 1800 tan 4 E ' where E = elapsed time in minutes, and E in the denominator is the elapsed time expressed in arc. If we put $ = latitude of the place of observation, H- north, south, b = declination of the sun, H- north, south, A = hourly change of declination, +- north, south, X = correction to reduce the middle chronometer time to chronometer time of ap- parent noon, algebraically additive, tf = the same for midnight, we have X = A A tan 4- B A tan d X I = A A tan < -+ B A tan 8. TABLE II. Logarithms of Numbers to four decimal places. The first two fig-* ures of the number are found in the left-hand column, the third at the top, and the corresponding logarithm opposite and under these respectively. The proportional part for the fourth figure is found on the side in the same line with the logarithm taken out. The proper characteristic of the logarithm is to be supplied by the usual rule. TABLE III. Mean Refraction, reduced from BESSEL'S Tables, to barometer 30 inches, and thermometer 50. TABLES III. A. and III. B. Corrections of the Mean Refraction for the Height of the Barometer and Thermometer, also deduced from BESSEL'S Tables. These are the same as Tables IV. A. and IV. B., given in the Appendix to the Nautical Alma- nac for 1855, where they are used for finding the corrections of the Mean Reduced Refraction for Lunars. It is for the purpose of having the same table for correct- ing both these mean refraction tables, that the argument in Tables III. A. and III. B* is the mean refraction instead of the apparent altitude. TABLE IV. For converting Sidereal into Mean Solar Time. This table gives the correction required to reduce a sidereal interval to its equivalent solar interval. 10 73 TABLE I. LOG. A. AND LOG. B. For Computing the Equation of Equal Altitudes. KSS3&TA+} ARGUMENT = ELAPSED TIME. { ^Lfg h t?B+' |l Q h. l h ' r f- 4 h - h. Log. A. Log. B. Log. A. Log. B. Log. A. Log. B. Log. A. Log. B. Log. A. Log. B. Log. A. Log. B. 9.4059 9.4059 9.4072 9.4034 9.4109 9.3959 9.4172 9.3828 9.4260 9.3635 9.4374 9.3369 i .4059 .4059 .4072 .4034 .4110 .3957 .4173 .3825 .4261 .3631 .4376 .3364 2 .4059 .4059 .4073 .4033 .4111 .3955 .4174 .3822 .4263 .3627 .4378 .3358 3 .4059 .4059 .4073 .4032 .4112 .3953 .4175 .3820 .4265 .3624 .4380 .3353 4 .4059 .4059 .4074 .4031 .4113 .3952 .4177 .3817 .4266 .3620 .4383 .3348 5 9.4059 9.4059 9.4074 9.4030 9.4113 9.3950 9.4178 9.3814 9.4268 9.3616 9.4385 9.3S43 6 .4060 .4059 .4074 .4029 .4114 .3948 .4179 .3811 .4270 .3612 .4387 .3337 7 .4060 .4059 .4075 .4028 .4115 .3946 .4181 .3809 .4272 .3608 .4389 .3332 8 .4060 .4059 .4075 .4027 .4116 .3944 .4182 .3806 .4273 .3604 .4391 .3327 9 .4060 .4059 .4076 .4026 .4117 .3943 .4183 .3803 .4275 .3600 .4393 .3321 10 9.4060 9.4059 9.4076 9.4025 9.4118 9.3941 9.4184 9.3800 9.4277 9.3596 9.4396 9.3316 11 .4060 .4059 .4077 .4024 .4119 .3939 .4186 .3797 .4279 .3592 .4398 .3311 12 .4060 .4058 .4077 .4023 .4120 .3937 .4187 .3794 .4280 .3588 .4400 .3305 13 .4060 .4058 .4078 .4022 .4121 .3935 .4188 .3792 .4282 .3584 .4402 .3300 14 .4060 .4058 .4078 .4021 .4121 .3933 .4190 .3789 .4284 .3580 .4405 .3294 15 9.4060 9.4058 9.4079 9.4020 9.4122 9.3931 9.4191 9.3786 9.4286 9.3576 9.4407 9.3289 16 .4060 .4058 .4079 .4019 .4123 .3929 .4193 .3783 .4288 .3572 .4409 .3283 17 .4060 .4057 .4080 .4018 .4124 .3927 .4194 .3780 .4289 .3568 .4411 .3278 18 .4061 .4057 .4080 .4017 .4125 .3925 .4195 .3777 .4291 .3564 .4414 .3272 19 .4061 .4057 .4081 .4016 .4126 .3923 .4197 .3774 .4293 .3559 .4416 .3266 20 9.4061 9.4057 9.4081 9.4015 9.4127 9.3921 9.4198 9.3771 9.4295 9.3555 9.4418 9.3261 21 .4061 .4056 .4082 .4014 .4128 .3919 .4199 .3768 .4297 .3551 .4420 .3255 22 .4061 .4056 .4083 .4013 .4129 .3917 .4201 .3765 .4299 .3547 .4423 .3249 23 .4061 .4056 .4083 .4012 .4130 .3915 .4202 .3762 .4300 .3542 .4425 .3244 24 .4061 .4055 .4084 .4010 .4131 .3913 .4204 .3759 .4302 .3538 .4427 .3238 25 9.4062 9.4055 9.4084 9.4009 9.4132 9.3911 9.4205 9.3756 9.4304 9.3534 9.4430 9.3232 26 .4062 .4055 .4085 .4008 .4133 .3909 .4207 .3752 .4306 .3530 .4432 .3226 27 .4062 .4054 .4086 .4007 .4134 .3907 .4208 .3749 .4308 .3525 .4434 .3220 28 .4062 .4054 .4086 .4006 .4135 .3905 .4209 .3746 .4310 .3521 .4437 .3214 29 .4062 .4054 .4087 .4004 .4136 .3903 .4211 .3743 .4312 .3516 .4439 .3208 30 9.4062 9.4053 9.4087 9.4003 9.4137 9.3900 9.4212 9.3740 9.4314 9.3512 9.4441 9.3203 31 .4063 .4053 .4088 .4002 .4138 .3898 .4214 .3737 .4315 .3508 .4444 .3197 32 .4063 .4052 .4089 .4001 .4139 .3896 .4215 .3733 .4317 .3503 .4446 .3191 33 .4063 .4052 .4089 .3999 .4140 .3894 .4217 .3730 .4319 .3499 .4448 .3185 34 .4063 .4051 .4090 .3998 .4141 .3892 .4218 .3727 .4321 .3494 .4451 .3178 35 9.4064 9.4051 9.4091 9.3997 9.4142 9.3889 9.4220 9.3723 9.4323 9.3490 9.4453 9.3172 36 .4064 .4050 .4091 .3995 .4144 .3887 .4221 .3720 .4325 .3485 .4456 .3166 37 .4064 .4050 .4092 .3994 .4145 .3885 .4223 .3717 .4327 .3480 .4458 .3160 38 .4064 .4049 .4093 .3993 .4146 .3882 .4224 .3713 .4329 .3476 .4460 .3154 39 .4065 .4049 .4093 .3991 .4147 .3880 .4226 .3710 .4331 .3471 .4463 .3148 40 9.4065 9.4048 9.4094 9.3990 9.4148 9.3878 9.4227 9.3707 9.4333 9.3467 9.4465 9.3142 41 .4065 .4048 .4095 .3988 .4149 .3875 .4229 .3703 .4335 .3462 .4468 .3135 42 .4065 .4047 .4095 .3987 .4150 .3873 .4231 .3700 .4337 .3457 .4470 .3129 43 .4066 .4047 .4096 .3985 .4151 .3871 .4232 .3696 .4339 .3453 .4473 .3123 44 .4066 .4046 .4097 .3984 .4152 .3868 .4234 .3693 .4341 .3448 .4475 .3116 45 9.4066 9.4045 9.4097 9.3982 9.4154 9.3866 9.4235 9.3690 9.4343 9.3443 9.4477 9.3110 46 .4067 .4045 .4098 .3981 .4155 .3863 .4237 .3686 .4345 .3438 .4480 .3103 47 .4067 .4044 .4099 3979 .4156 .3861 .4238 .3683 .4347 .3433 .4482 .3097 48 .4067 .4043 .4100 .3978 .4157 .3859 .4240 .3679 .4349 .3429 .4485 .3091 49 .4068 .4043 .4100 .3976 .4158 .3856 .4242 .3675 .4351 .3424 .4487 .3084 50 9.4068 9.4042 9.4101 9.3975 9.4159 9.3854 9.4243 9.3672 9.4353 9.3419 9.4490 9.3078 51 .4068 .4041 .4102 .3973 .4161 .3851 .4245 .3668 .4355 .3414 .4492 .3071 52 .4069 .4041 .4103 .3972 .4162 .3849 .4246 .3665 .4357 .3409 .4494 .3064 53 .4069 .4040 .4103 .3970 .4163 .3846 .4248 .3661 .4359 .3404 .4497 .3058 54 .4069 .4039 .4104 .3969 .4164) .3843 .4250 .3657 .4361 .3399 .4500 .3051 55 9.4070 9.4038 9.4105 9.3967 9.4165 9.3841 9.4251 9.3654 9.4363 9.3394 9.4503 9.3044 56 .4070 .4038 .4106 .3965 .4167 .3838 .425a .3650 .4366 .3389 .4505 .3038 57 .4071 .4037 .4107 .3964 .4168 .3836 .4255 .3646 .4368 .3384 .4508 .3031 58 .4071 .4036 .4107 .3962 .4169' .3833 .4256 .3643 .4370 .3379 .4510 .3024 59 .4071 .4035 .4108 .3960 .4170 .3830 .4258 .3639 .4372 .3374 .4513 .3017 60 9.4072 94034 9.4109 9.3959 9.4172 9.3828 9.4260 9.3635 9.4374 9.3369 9.4515: 9.3010 74 TABLE I. LOG. A. AND LOG. B For Computing the Equation of Equal Altitudes. forSgtt7A + } ARGUMENT = ELAPSED TIME. {Mia m *?B+ 1 s o< a B e gh. 7 b. 8 h - gh. io b - U h. Log. A. Log. B. Log. A. Log. B. Log. A. Log. B. Log. A. Log. B. Log. A. Log. B. Log. A. Log.B. m 9.4515 9.3010 9.4685 9.2530 9.4884 9.1874 9.5115 9.0943 95379 8.9509 9.5680 8.6837 1 .4518 .3003 .4688 .2520 .4888 .1861 .5119 .0925 .5384 .9478 .5685 .6770 2 .4521 .2996 .4691 .2511 .4892 .1848 .5123 .0906 .5389 .9447 .5691 .6701 3 .4523 .2989 .4694 .2502 .4895 .1835 .5127 .0887 .5393 .9416 .5696 .6632 4 .4526 .2982 .4697 .2492 .4899 .1822 .5132 .0867 .5398 .9384 .5701 .6560 5 9.4528 9.2975 9.4701 9.2483 9.4902 9.1809 9.5136 9.0848 9.5403 8.9352 9.5707 8.6488 6 .4531 .2968 .4704 .2473 .4906 .1796 .5140 .0828 .5408 .9320 .5712 .6414 7 .4534 .2961 .4707 .2463 .4910 .1782 .5144 .0809 .5412 .9287 .5718 .6339 8 .4536 .2954 .4710 .2454 .4913 .1769 .5148 .0789 .5417 .9254 .5723 .6262 9 .4539 .2947 .4713 .2444 .4917 .1756 .5153 .0769 .5422 .9221 .5728 .6183 10 9.4542 9.2940 9.4716 9.2434 9.4921 9.1742 9.5157 9.0749 9.5427 8.9187 9.5734 8.6103 11 .4544 .2932 .4719 .2425 .4924 .1728 .5161 .0729 .5432 .9153 .5739 .6021 12 .4547 .2925 .4723 .2415 .4928 .1715 .5165 .0708 .5436 .9118 ,5745 .5937 13 .4550 .2918 .4726 .2405 .4932 .1701 .5169 .0688 .5441 .9083 .5750 .5852 14 .4552 .2911 .4729 .2395 .4935 .1687 .5174 .0667 .5446 .9048 .5756 .5764 15 9.4555 9.2903 9.4732 9.2385 9.4939 9.1673 9.5178 9.0646 9.5451 8.9013 9.5761 8.5674 16 .4558 .2896 .4735 .2375 .4943 .1659 .5182 .0625 .5456 .8977 .5767 .5583 17 .4561 .2888 .4738 .2365 .4946 .1645 .5186 .0604 .5461 .8940 .5772 .5488 18 .4563 .2881 .4742 .2355 .4950 .1630 .5191 .0583 .5466 .8903 .5778 .5392 19 .4566 .2873 .4745 .2344 .4954 .1616 .5195 .0561 .5470 .8866 .5783 .5293 20 9.4569 9.2866 9.4748 9.2334 9.4958 9.1602 9.5199 9.0540 9.5475 8.8829 9.5789 8.5192 21 .4572 .2858 .4751 .2324 .4961 .1587 .5204 .0518 .5480 .8791 .5794 .5088 22 .4574 .2850 .4755 .2313 .4965 .1573 .5208 .0496 .5485 .8752 .5800 .4981 23 .4577 .2843 .4758 .2303 .4969 .1558 .5212 .0474 .5490 .8713 .5806 .4871 24 .4580 .2835 .4761 .2292 .4973 .1543 .5217 .0452 .5495 .8674 .5811 .4758 25 9.4583 9,2827 9.4764 9.2282 9.4977 9.1528 9.5221 9.0429 9.5500 8.8634 9.5817 8.4641 26 .4585 .2819 .4768 .2271 .4980 .1513 .5225 .0406 .5505 .8594 .5822 .4521 27 .4588 .2812 .4771 .2261 .4984 .1498 .5230 .0383 .5510 .8553 .5828 .4397 28 .4591 .2804 .4774 .2250 .4988 .1483 .5234 .0360 .5515 .8512 .5834 .4270 29 .4594 .2796 .4778 .2239 .4992 .1468 .5238 .0337 .5520 .8470 .5839 .4138 30 9.4597 9.2788 9.4781 9.2228 9.4996 9.1453 9.5243 9.0314 9.5525 8.8427 9.5845 8.4001 31 .4600 .2780 .4784 .2217 .5000 .1437 .5217 .0290 .5530 .8384 .5851 .3860 32 .4602 .2772 .4788 .2206 .5003 .1422 .5252 .0266 .5535 .8341 .5856 .3713 33 .4605 .2764 .4791 .2195 .5007 .1406 .5256 .0242 .5540 .8297 .5862 .3561 34 .4608 .2756 .4794 .2184 .5011 .1390 .5261 .0218 .5545 .8253 .5868 .3403 35 9.4611 9.2747 9.4798 9.2173 9.5015 9.1375 9.5265 9.0194 9.5550 8.8208 9.5874 8.3239 36 .4614 .2739 .4801 .2162 .5019 .1359 .5269 .0169 .5555 .8162 .5879 .3067 37 .4617 .2731 .4804 .2151 .5023 .1343 .5274 .0144 .5560 .8115 .5885 .2888 38 .4620 .2723 .4808 .2140 .5027 .1327 .5278 .0119 .5565 .8068 .5891 .2701 39 .4622 .2714 .481 1 .2128 .5031 .1310 .5283 .0094 .5570 .8020 .5897 .2505 40 9.4625 9.2706 9.4815 9.2117 9.5035 9.1294 9.5287 9.0069 9.5576 8.7972 9.5902 8.2299 41 .4628 .2698 .4818 .2105 .5038 .1278 .5292 .0043 .5581 .7923 .5908 .2082 42 .4631 .2689 .4821 .2094 .5042 .1261 .5296 .0017 .5586 .7873 .5914 .1853 43 .4634 .2681 .4825 .2082 .5046 .1244 .5301 8.9991 .5591 .7823 .5920 .1611 44 .4637 .2672 .4828 .2070 .5050 .1228 .5305 .9965 .5596 .7772 .5926 .1354 45 9.4640 9.2664 9.4832 9.2059 9.5054 9.1211 9.5310 8.9938 9.5601 8.7720 9.5931 8.1080 46 .4643 .2655 .4835 .2047 .5058 .1194 .53 ! 5 .9911 .5606 .7668 .5937 .0786 47 .4646 .2646 .4839 .2035 .5062 .1177 .5319 .9884 .5612 .7614 .5943 .0470 48 .4649 .2638 .4842 .2023 .5066 .1159 .5324 .9857 .5617 .7560 .5949 .0128 49 .4652 .2629 .4846 .2011 .5070 .1142 .5328 .9830 .5622 .7505 .5955 7.9756 50 9.4655 9.2620 9.4849 9.1999 9.5074 9.1125 9.5333 89802 9.5827 8.7449 9.5961 7.9348 51 .4658 .2611 .4853 .1987 .5078 .1107 .5337 .9774 .5632 .7392 .5967 .8897 52 .4661 .2602 .4856 .1974 .5082 .1089 .53421 .9745 .5638 .7335 .5973 .8391 53 .4664 .2593 .4860 .1962 .50861 .1072 .5347 .9717 .5643 .7276 .5979 .7817 54 .4667 .2584 .4863 .1950 .5091 j .1054 .5351 .9688 .5648 .7217 .5985 .7154 55 9.4670 9.2575 9.4867 9.1937 9.5095 9.1036 9.5356 8.9659 9.5654 8.7156 9.5991 7.6368 56 .4673 .2566 .4870 .1925 .5099 .1017 .5361) .9630 .5659 .7094 .5997 .5405 57 .4676 .2557 .4874 .1912 .5103 .0999 .5365 .9600 .5664 .7032 .6003 .4162 58 .4679 .2548 .4877 .1900 .5107 .0981 .5370 .9570 .5669 .6968 .6009 .2407 59 .4682 .2539 .4881) .1887 .51111 .0962 .5375 - .9540 .5675 .6903 .6015 6.9591 60 9.4685 92530 9.4884 9.1874 9.5115 9.0943 9.5379 8.9509 9.5680 8.6837 9.6021 /n/. 75 TABLE 1. LOG. A. Ai\D LOG. For Computing the Equation of Equal Altitudes. foJ SSS g ttTA + } ARGUMENT = ELAPSED TIME. { Sdnfg^B- Elapsed Time. If" If" 14 h - is h - 16"' 1? h. Log. A. Log. B. Log. A. Log.B 1 Log. A. Log.B. Log. A. Log.B. Log. A. Log.B. Log. A. Log. B. m 9.6021 Inf. 9.6406 8.7563 9.6841 9.0971 9.7333 9.3162 9.7895 9.4884 9.8539 9.6383 1 .6027 6.9603 .6412 .7641 ,6848 .1014 .7342 .3194 .7905 .4911 .8550 .6407 2 .6033 7.2431 .6419 .7718 .6856 .1057 .7351 .3225 .7915 .4937 .8562 .6431 3 .6039 .4198 .6426 .7794 .6864 .1099 .7360 .3256 .7925 .4963 .8573 .6455 4 .6045 .5453 .6433 .7868 .6872 .1141 .7369 .3287 .7935 .4990 .8585 .6478 5 9.6051 7.6428 9.6440 8.7942 9.6879 9.1183 9.7378 9.3319 9.7945 9.5016 9.8597 9.6502 6 .6057 .7226 .6447 .8015 .6887 .1224 .7386 .3350 .7955 .5042 .8608 .6526 7 .6063 .7902 .6454 .8087 .6895 .1265 .7395 .3380 .7965 .5068 .8620 .6550 8 .6069 .8488 .6461 .8158 .6903 .1306 .7404 .3411 .7975 .5094 .8632 .6573 9 .6075 .9005 .6467 .8227 .6911 .1347 .7413 .3442 .7986 .5120 .8644 .6597 10 9.6082 7.9469 9.6474 8.8296 9.6919 9.1387 9.7422 Q.3472 9.7996 9.5146 9.8655 9.6621 11 .6088 .9889 .6481 .8364 .6926 .1428 .7431 .3503 .8006 .5171 .8667 .6644 12 .6094 8.0273 .6488 .8432 .6934 .1468 .7440 .3533 .8016 .5197 .8679 .6668 13 .6100 .0627 .6495 .8498 .6942 .1507 .7449 .3563 .8027 .5223 .8691 .6691 14 .6106 .0955 .6502 .8564 .6950 .1547 .7458 .3593 .8037 .5248 .8703 .6715 15 9.6112 8.1260 9.6509 8.8628 9.6958 9.1586 9.7467 9.3623 9.8047 9.5274 9.8715 9.6738 16 .6119 .1547 .6516 .8692 .6966 .1625 .7476 .3653 .8058 .5300 .8727 .6762 17 .6125 .1816 .6523 .8756 .6974 .1664 .7485 .3683 .8068 .5325 .8739 .6785 18 .6131 .2071 .6530 .8818 .6982 .1703 .7494 .3713 .8078 .5351 .8751 .6809 19 .6137 .2312 .6538 .8880 .6990 .1741 .7503 .3742 .8089 .5376 .8763 .6832 20 9.6144 8.2541 9.6545 8.8941 9.6998 9.1779 9.7512 9.3772 9.8099 9.5401 9.8775 9.6856 21 .6150 .2759 .6552 .9002 .7006 .1817 .7522 .3801 .8110 .5427 .8787 .6879 22 .6156 .2967 .6559 .9062 .7014 .1855 .7531 .3831 .8120 .5452 .8799 .6903 23 .6163 .3166 .6566 .9121 .7022 .1893 .7540 .3860 .8131 .5477 .8812 .6926 24 .6169 .3357 .6573 .9180 .7030 .1930 .7549 .3889 .8141 .5502 .8824 .6949 25 9.6175 8.3540 9.6580 8.9238 9.7038 9.1967 9.7558 9.3918 9.8152 9.5528 9.8836 9.6973 26 .6182 .3717 .6588 .9295 .7047 .2004 .7568 .3947 .8162 .5553 .8848 .6996 27 .6188 .3887 .6595 .9352 .7055 .2041 .7577 .3976 .8173 .5578 .8861 .7019 28 .6194 .4051 .6602 .9408 .7063 .2078 .7586 .4005 .8184 .5603 .8873 .7043 29 .6201 .4210 .6609 .9464 .7071 .2114 .7595 .4033 .8194 .5628 .8885 .7066 30 9.6207 8.4363 9.6616 8.9519 9.7079 9.2150 9.7605 9.4062 9.8205 9.5653 9.8898 9.7089 31 .6214 .4512 .6624 .9573 .7088 .2186 .7614 .4090 .8216 .5677 .8910 .7112 32 .6220 .4657 .6631 .9627 .7096 .2222 .7624 .4119 .8227 .5702 .8923 .7136 33 .6226 .4796 .6638 .9681 .7104 .2258 .7633 .4147 .8237 .5727 .8935 .7159 34 .6233 .4932 .6645 .9734 .7112 .2293 .7642 .4175 .8248 .5752 .8948 .7182 35 9.6239 8.5064 9.6653 8.9787 9.7121 9.2329 9.7652 9.4204 9.8259 9.5777 9.8961 9.7205 36 .6246 .5192 .6660 .9839 .7129 .2364 .7661 .4232 .8270 .5801 .8973 .7228 37 .9252 .5318 .6667 .9891 .7137 .2399 .7671 .4260 .8281 .5826 .8986 .7251 38 .6259 .5440 .6675 .9942 .7146 .2434 .7680 .4288 .8292 .5850 .8999 .7275 39 .6265 .5559 .6682 .9993 .7154 .2468 .7690 .4316 .8303 .5875 .9011 .7298 40 9.6272 8.5675 9.6690 9.0043 9.7162 9.2503 9.7699 9.4343 9.8314 9.5900 9.9024 9.7321 41 .6279 .5788 .6697 .0093 .7171 .2537 .7709 .4371 .8325 .5924 .9037 .7344 42 .6285 .5899 .6704 .0142 .7179 .2571 .7718 .4399 .8336 .5948 .9050 .7367 43 .6292 .6008 .6712 .0191 .7187 .2605 .7728 .4426 .8347 .5973 .9063 .7390 44 .6298 .6114 .6719 .0240 .7196 .2639 .7738 .4454 .8358 .5997 .9075 .7413 45 9.6305 8.6218 9.6727 9.0288 9.7204 9.2673 9.7747 9.4481 9.8369 9.6022 9.9088 9.7436 46 .6311 .6320 .6734 .0336 .7213 .2706 .7757 .4509 .8380 .6046 .9101 .7459 47 .6318 .6419 .6742 .0384 .7221 .2740 .7767 .4536 .8391 .6070 .9114 .7482 48 .6325 .6517 .6749 .0431 .7230 .2773 .7776 .4563 .8402 .6094 .9127 .7505 49 .6331 .6613 .6757 .0478 .7238 .2806 .7786 .4590 .8414 .6119 .9140 .7529 50 9.6338 8.6707 9.6764 9.0524 9.7247 9.2839 9.7796 9.4617 9.8425 9.6143 9.9154 9.7552 51 .6345 .6799 .6772 .0570 .7256 .2872 .7806 .4644 .8436 .6167 .9167 .7575 52 .6351 .6890 .6779 .0616 .7264 .2905 .7815 .4671 .8447 .6191 .9180 .7598 53 .6358 .6979 .6787 .0662 .7273 .2937 .7825 .4698 .8459 .6215 .9193 .7621 54 .6365 .7067 .6795 .0707 .7281 .2970 .7835 .4725 .8470 .6239 .9206 .7644 55 9.6372 8.7153 9.6802 9.0752 9.7290 9.3002 9.7845 9.4752 9.8481 9.6263 9.9220 9.7667 56 .6378 .7237 .6810 .0796 .7299 .3034 .7855 .4778 .8493 .6287 .9233 .7690 57 .6385 .7321 .6818 .0840 .7307 .3066 .7865 .4805 .8504 .6311 .9246 .7713 58 .6392 .7402 .6825 .0884 .7316 .3098 .7875 .4831 .8516 .6335 .9260 .7736 59 .6399 .7483 .6833 .0928 .7324 .3130 .7885 .4858 .8527 .6359 .9273 .7759 60 9.6406 8 7563 9.68411 9.0971 9.7333 9.3162 9.7895 9.4884 9.8539 9.6383 9.9287 9.7782 76 TABLE I. LOG. A. AND LOG. B, For Computing the Equation of Equal Altitudes. lorSSgttTA-f} ARGUMENT = ELAPSED TIME. {SSSi5?B- !| S H 18 h - 19 h - 20 h - 21 h - 2f- ir Log. A. Log. B. Log. A. Log.B. Log. A. Log. B. Log. A. Log. B. Log. A. Log. B. Log. A. Log. B. m 9.9287 9.7782 0.0172 9.9167 0.1249 0.0625 0.2623 0.2279 04523 0.4372 0.7689 0.7652 1 .9300 .7804 .0188 .9190 .1269 .0650 .2649 .2309 .4562 .4414 .7765 .7729 2 .9314 .7827 .0204 .9213 .1290 .0676 .2676 .2339 .4601 .4455 .7842 .7807 3 .9327 .7850 .0221 .9237 .1310 .0701 .2702 .2370 .4640 .4497 .7920 .7886 4 .9341 .7873 .0237 .9260 .1330 .0727 .2729 .2401 .4680 .4540 .8000 .7967 5 9.9355 9.7896 0.0253 9.9284 0.1351 0.0753 0.2756 0.2431 0.4720 0.4582 0.8081 0.8049 6 .9368 .7919 .0270 .9307 .1371 .0779 .2783 .2462 .4761 .4625 .8163 .8133 7 .9382 .7942 .0286 .9331 .1392 .0805 .2810 .2493 .4801 .4668 .8247 .8218 8 .9396 .7965 .0303 .9355 .1412 .0830 .2838 .2524 .4842 .4711 .8333 .8305 9 .9410 .7988 .0319 .9378 .1433 .0856 .2865 .2556 .4884 .4755 .8420 .8393 10 9.9424 9.8011 0.0336 9-9402 0.1454 0.0882 0.2893 0.2587 0.4926 0.4799 0.8508 0.8483 11 .9437 .8034 .0353 .9426 .1475 .0909 .2921 .2619 .4968 .4844 .8599 .8574 12 .9451 .8057 .0370 .9449 .1496 .0935 .2949 .2650 .5010 .4889 .8691 .8667 13 .9465 .8080 .0386 .9473 .1517 .0961 .2977 .2682 .5053 .4934 .8786 .8763 14 .9479 .8103 .0403 .9497 .1538 .0987 .3005 .2714 .5097 .4980 .8882 .8860 15 9.9493 9.8126 0.0420 9.9520 0.1559 0.1013 0.3034 0.2746 0.5140 0.5026 0.8980 0.8959 16 .9508 .8149 .0437 .9544 .1581 .1040 .3063 .2778 .5184 .5072 .9080 .9060 17 .9522 .8172 .0454 .9568 .1602 .1066 .3091 .2811 .5229 .5118 .9183 .9164 18 .9536 .8195 .0472 .9592 .1623 .1093 .3120 .2843 .5274 .5165 .9288 .9270 19 .9550 .8218 .0489 .9616 .1645 .1119 .3150 .2876 .5319 .5213 .9396 .9378 20 9.9564 9.8241 0.0506 9.9640 0.1667 0.1146 0.3179 0.2909 0.5365 0.5261 0.9506 0.9489 21 .9579 .8264 .0523 .9664 .1689 .1173 .3208 .2942 .5411 .5309 .9618 .9603 22 .9593 .8287 .0541 .9687 .1711 .1200 .3238 .2975 .5458 .5358 .9734 .9719 23 .9607 .8310 .0558 .9711 .1733 .1226 .3268 .3008 .5505 .5407 .9853 .9839 24 .9622 .8333 .0576 .9735 .1755 .1253 .3298 .3041 .5553 .5457 .9975 .9961 25 9.9636 9.8356 0.0593 9.9760 0.1777 0.1280 0.3328 0.3075 0.5601 0.5507 1.0100 1.0087 26 .9651 .8379 .0611 .9784 .1799 .1308 .3359 .3109 .5649 .5557 .0228 .0216 27 .9665 .8402 .0628 .9808 .1821 .1335 .3389 .3143 .5698 .5608 .0361 .0350 28 .9680 .8425 .0646 .9832 .1844 .1362 .3420 .3177 .5748 .5660 .0497 .0487 29 .9695 .8448 .0664 .9856 .1867 .1389 .3451 .3211 .5798 .5712 .0638 .0628 30 9.9709 9.8471 0.0682 9.9880 0.1889 0.1417 0.3482 0.3245 0.5848 0.5764 1.0783 1.0774 31 .9724 .8494 .0700 .9904 .1912 .1444 .3514 .3280 .5899 .5817 .0934 .0925 32 .9739 .8517 .0718 .9929 .1935 .1472 .3545 .3315 .5951 .5871 .1089 .1081 33 .9754 .8540 .0736 .9953 .1958 .1499 .3577 .3350 .6003 .5925 .1250 .1242 34 .9769 .8563 .0754 .9977 .1981 .1527 .3609 .3385 .605^ .5979 .1416 .1409 35 9.9784 9.8586 0.0772 0.0002 0.2004 0.1555 0.3641 0.3420 0.6110 0.6034 1.1590 1.1583 36 .9798 .8609 .0790 .0026 .2028 .1582 .3674 .3456 .6164 .6090 .1770 .1764 37 .9813 .8632 .0809 .0051 .2051 .1610 .3706 .3491 .6218 .6147 .1958 .1952 38 .9829 .8655 .0827 .0075 .2075 '.1638 .3739 .3527 .6273 .6204 .2154 .2149 39 .9844 .8678 .0845 .0100 .2098 .1667 .3772 .3563 .6329 .6261 .2359 .2354 40 9.9859 9.8701 0.0864 0.0124 0.2122 0.1695 0.3805 0.3599 0.6386 0.6319 1.2573 1.2569 41 .9874 .8724 .0883 .0149 .2146 .1723 .3839 .3636 .6443 .6378 .2799 .2795 42 .9889 .8748 .0901 .0173 .2170 .1751 .3873 .3673 .6501 .6438 .3037 .3033 43 .9904 .8771 .0920 .0198 .2194 .1780 .3907 .3710 .6560 .6498 .3288 .3285 44 .9920 .8794 .0939 .0223 .2218 .1808 .3941 .3747 .6619 .6559 .3554 .3552 45 9.9935 9.8817 0.0958 0.0248 0.2243 0.1837 0.3975 0.3784 0.6679 0.6621 1.3837 1.3835 46 .9951 .8840 .0976 .0272 .2267 .1866 .4010 .3822 .6740 .6684 .4140 .4138 47 .9966 .8863 .0995 .0297 .2292 .1895 .4045 .3859 .6802 .6747 .4465 .4463 48 .9982 .8887 .1015 .0322 .2316 .1924 .4080 .3897 .6865 .6811 4815 .4814 49 .9998 .8910 .1034 .0347 .2341 .1953 .4115 .3936 .6928 .6876 .5196 .5195 50 0.0013 9.8933 0.1053 0.0372 0.2366 0.1982 0.4151 0.3974 0.6993 0.6942 1.5613 1.5612 51 .0029 .8956 .1072 .0397 .2391 .2011 .4187 .4013 .7058 .7008 .6074 .6073 52 .0044 .8980 .1092 .0422 .2416 .2040 .4223 .4052 .7124 .7076 .6588 .6587 53 .0060 .9003 .1111 .0447 .2442 .2070 .4260 .4091 .7191 .7144 .7171 .7171 54 .0076 .9026 .1131 .0473 .2467 .2099 .4297 .4130 .7259 .7214 .7844 .7843 55 0.0092 9.9050 0.1150 0.0498 0.2493 0.2129 0.4334 0.4170 0.7328 0.7284 1.8638 1.8638 56 .0108 .9073 .1170 .0523 .2518 .2159 .4371 .4210 .7398 .7355 .9610 .9610 57 .0124 .9096 .1190 .0548 .2544 .2189 .4408 .4250 .7469 .7428 2.0863 2.0863 58 .0140 .9120 .1209 .0574 .2570 .2219 .4446 .4291 .7541 .7501 .2627 .2627 59 .0156 .9143 .1229 .0599 .2596 .2249 .4485 .4331 .7615 .7576 2.5640 2.5640 60 0.0172 99167 0.1249 0.0625 0.2623 0.2279 0.4523 ! 0.4372 0.7689 0.7652 Inf. 7n/_J 77 TAKLE II. LOGARITHMS OF NUMBERS. 1 Proportional Parts, la 1 2 3 4 5 6 7 8 9 i* 1 2 3 4 7 8 9 10 0000 0043 0086 0128 0170 0212 0253 0294 0334 0374 4 8 12 17 21 25 29 33 37 11 0414 0453 0492 0531 0569 0607 0645 0682 0719 0755 4 8 11 15 19 23 26 30 34 12 0792 0828 0864 0899 0934 0969 1004 1038 1072 1106 3 7 10 14 17 21 24 28 31 13 1139 1173 1206 1239 1271 1303 1335 1367 1399 1430 3 6 10 13 16 19 "21. & 29 14 1461 1492 1523 1553 1584 1614 1644 1673 1703 1732 3 6 9 12 15 18 21 SM 27 15 1761 1790 1818 1847 1875 1903 1931 1959 1987 2014 3 6 8 11 14 17 20 22 25 16 2041 2068 2095 2122 2148 2175 2201 2227 2253 2279 3 5 S 11 13 16 18 21 24 17 2304 2330 2355 2380 2405 2430 2455 2480 2504 2529 2 5 7 10 12 15 17 20 22 18 2553 2577 2601 2625 2648 2672 2695 2718 2742 2765 2 5 7 9 12 14 16 19 21 19 2788 2810 2833 2856 2878 2900 2923 2945 2967 2989 2 4 7 9 11 13 16 18 20 20 3010 3032 3054 3075 3096 3118 3139 3160 3181 3201 2 4 6 8 11 13 15 17 19 21 3222 3243 3263 3284 3304 3324 3345 3365 3385 3404 2 4 6 8 10 12 14 16 18 22 3424 3444 3464 3483 3502 3522 3541 3560 3579 3598 2 4 6 8 10 12 14 15 17 23 3617 3636 3655 3674 3692 3711 3729 3747 3766 3784 2 4 6 7 9 11 13 15 17 24 3802 3820 3838 3856 3874 3892 3909 3927 3945 3962 2 4 5 7 9 11 12 14 16 25 3979 3997 4014 4031 4048 4065 4082 4099 4116 4133 2 3 5 7 9 10 12 14 15 26 4150 4166 4183 4200 4216 4232 4249 4265 4281 4298 2 3 5 7 8 10 11 13 15 27 4314 4330 4346 4362 4378 4393 4409 4425 4440 4456 2 3 5 6 8 9 11 13 14 28 4472 4487 4502 4518 4533 4548 4564 4579 4594 4609 2 3 5 6 8 9 11 12 14 29 4624 4639 4654 4669 4683 4698 4713 4728 4742 4757 1 3 4 6 7 9 10 12 13 30 4771 4786 4800 4814 4829 4843 4857 4871 4886 4900 3 4 6 7 9 10 11 13 31 4914 4928 4942 4955 4969 4983 4997 5011 5024 5038 3 4 6 7 8 10 11 12 32 5051 5065 5079 5092 5105 5119 5132 5145 5159 5172 3 4 5 7 8 9 11 12 33 5185 5198 5211 5224 5237 5250 5263 5276 5289 5302 3 4 5 6 8 9 10 12 34 5315 5328 5340 5353 5366 5378 5391 5403 5416 5428 3 4 5 6 8 9 10 11 35 5441 5453 5465 5478 5490 5502 5514 5527 5539 5551 2 4 5 6 7 9 10 11 36 5563 5575 5587 5599 5611 5623 5635 5647 5658 5670 2 4 5 6 7 8 10 11 37 5682 5694 5705 5717 5729 5740 5752 5763 577 5786 2 3 5 6 7 8 9 10 38 5798 5809 5821 5832 5843 5855 5866 5877 5888 5899 2 3 5 6 7 8 9 10 39 5911 5922 5933 5944 5955 5966 5977 5988 5999 6010 2 3 4 5 7 8 9 10 40 6021 6031 6042 6053 6064 6075 6085 6096 6107 6117 2 3 4 5 6 8 9 10 41 6128 6138 6149 6160 6170 6180 6191 6201 6212 6222 2 3 4 5 6 7 8 9 42 6232 6243 6253 6263 6274 6284 6294 6304 6314 6325 2 3 4 5 G 7 8 9 43 6335 6345 6355 6365 6375 6385 6395 6405 6415 6425 2 3 4 5 6 7 8 9 44 6435 6444 6454 6464 6474 6484 6493 6503 6513 6522 2 3 4 5 6 7 8 9 45 6532 6542 6551 6561 6571 6580 6590 6599 6609 6618 2 3 4 5 6 7 8 9 46 6628 6637 6646 6656 6665 6675 6684 6693 6702 6712 2 3 4 5 6 '7 7 8 47 6721 6730 6739 6749 6758 6767 6776 6785 6794 6803 2 3 4 5 5 G 7 8 48 6812 6821 6830 6839 6848 6857 6866 6875 6884 6893 2 3 4 4 5 6 7 8 49 6902 6911 6920 6928 6937 6946 6955 6964 6972 6981 2 3 4 4 5 G 7 8 50 6990 6998 7007 7016 7024 7033 7042 7050 7059 7067 2 3 3 4 5 G 7 8 51 7076 7084 7093 7101 7110 7118 7126 7135 7143 7152 2 3 3 4 5 6 7 8 52 7160 7168 7177 7185 7193 7202 7210 7218 7226 7235 2j 2 3 4 5 6 7 7 53 7243 7251 7259 7267 7275 7284 7292 7300 7308 7316 2 2 3 4 5 6 6 7 54 7324 7332 7340 7348 7356 7364 7372 7380 j 7388 7396 1 2 2! 3 4 5 6 6j 7 78 TASLE SI. LOGARITHMS OF NUMBERS. Natural Numbers. 1 2 3 4 5 6 7 8 9 Proportional Parts, 1 2 3 4 i 6 7 8 9 .55 7404 7412 7419 7427 7435 7443 7451 7459 7466 7474 ! 2 3 .. 5 j 6 7 56 7482 7490 7497 7505 7513 7520 7528 7536 7543 7551 ] 2 4 5 5 6 7 57 7559 7566 7574 7582 7589 7597 7604 7612 7619 7627 ] f 3 4 5 5 6 7 58 7634 7642 7649 7657 7664 7672 7679 7686 7694 7701 1 1 3 4 .. | 6 7 59 7709 7716 7723 7731 7738 7745 7752 7760 7767 7774 ] 1 3 4 4 5 6 7 60 7782 7789 7796 7803 7810 7818 7825 7832 7839 7846 1 3 4 5 6 6 61 7853 7860 7868 7875 7882 7889 7896 7903 7910 7917 1 3 4 4 u G 6 62 7924 7931 7938 7945 7952 7959 7966 7973 7980 7987 1 3 4 5 6 6 63 7993 8000 8007 8014 8021 8028 8035 8041 8048 8055 1 3 3 4 5 5 6 64 8062 8069 8075 8082 8089 8096 8102 8109 8116 8122 1 2 3 3 4 5 5 6 65 "8129 8136 8142 8149 8156 8162 8169 8176 8182 8189 1 2 3 3 4 5 5 6 66 8195 8202 8209 8215 8222 8228 8235 8241 8248 8254 1 3 * 4 5 5 6 67 8261 8267 8274 8280 8287 8293 8299 8306 8312 8319 1 3 4 5 5 6 68 8325 8331 8338 8344 8351 8357 8363 8370 8376 8382 1 3 4 4 5 6 69 8388 8395 8401 8407 8414 8420 8426 8432 8439 8445 1 1 2 4 4 5 6 70 8451 8457 8463 8470 8476 8482 8488 8494 8500 8506 1 1 2 4 4 5 6 71 8513 8519 8525 8531 8537 8543 8549 8555 8561 8567 1 1 2 4 i 5 5 72 8573 8579 8585 8591 8597 8603 8609 8615 8621 8627 1 1 2 4 4 5 5 73 8633 8639 8645 8651 8657 8663 8669 8675 8681 8686 1 1 2 4 4 5 5 74 8692 8698 8704 8710 8716 8722 8727 8733 8739 8745 1 1 2 4 4 5 5 75 8751 8756 8762 8768 8774 8779 8785 8791 8797 8802 1 1 2 2 3 4 5 5 76 8808 8814 8820 8825 8831 8837 8842 8848 8854 8859 1 1 2 2 o 4 5 5 77 8865 8871 8876 8882 8887 8893 8899 8904 8910 8915 1 1 2 2 8 3 4 4 5 78 8921 8927 8932 8938 8943 8949 8954 8960 896^ 8971 1 1 2 2 3 8 4 4 5 79 8976 8982 8987 8993 8998 9004 9009 9015 9020 9025 1 1 2 2 2 3 4 4 5 80 9031 9036 9042 9047 9053 9058 9063 9069 9074 9079 1 2 2 3 3 4 4 5 81 9085 9090 9096 9101 9106 9112 9117 9122 9128 9133 1 2 2 3 3 4 4 5 82 9138 9143 9149 9154 9159 9165 9170 9175 9180 9186 1 2 2 3 3 4 4 5 S3 9191 9196 9201 9206 9212 9217 9222 9227 9232 9238 1 2 2 3 3 4 4 5 84 9243 9248 9253 9258 9263 9269 9274 9279 9284 9289 1 2 2 8 8 4 4 5 85 9294 9299 9304 9309 9315 9320 9325 9330 9335 9340 1 2 2 8 3 4 4 5 86 9345 9350 9355 9360 9365 9370 9375 9380 9385 9390 1 2 2 3 3 4 4 5 87 9395 9400 9405 9410 9415 9420 9425 9430 9435 9440 1 2 2 3 3 4 4 88 9445 9450 9455 9460 9465 9469 9474 9479 9484 9489 1 2 2 3 8 4 4 89 9494 9499 9504 9509 9513 9518 9523 9528 9533 9538 1 2 2 3 8 4 4 90 9542 9547 9552 9557 9562 9566 9571 9576 9581 9586 1 2 2 8 3 4 4 91 9590 9595 9600 9605 9609 9614 9619 9624 9628 9633 1 2 2 3 3 4 4 92 9638 9643 9647 9652 9657 9661 9666 9671 9675 9680 1 2 2 8 3 4 4 93 9685 9689 9694 9699 9703 9708 9713 9717 9722 9727 1 2 2 3 3 4 4 94 9731 9736 9741 9745 9750 9754 9759 9763 9768 9773 1 2 2 3 8 4 4 95 9777 9782 9786 9791 9795 9800 9805 9809 9814 9818 1 2 2 3 3 4 4 96 9823 9827 9832 9836 9841 9845 9850 9854 9859 9863 1 2 2 3 3 4 4 97 9868 9872 9877 9881 9886 9890 9894 9899 9903 9908 1 2 2 8 3 4 4 98 9912 9917 9921 9926 9930 9934 9939 9943 9948 9952 1 2 2 3 3 4 4 99 9956 9961 9965 9969 9974 9978 9983 9987 99911 9996 ' 1 2 2 3 3 3 4 79 TABLE III. MEAN REFRACTION. Barometer 30 inches. Fahrenheit's Thermometer 50. Apparent Altitude. Mean Refraction. .pparent Altitude. Mean Refraction. Apparent Altitude. Mean Refraction. Apparent Altitude. Mean .Refraction. Apparent Altitude. Mean Refraction. ( / ii 1 9 30 ; n 5 35.1 O 1 15 i // 3 34.1 o / 25 i ii 2 4.4 1 42 i ii 1 4.7 36 29.4 35 5 32.4 10 3 31.7 10 2 3.4 20 1 3.9 1 24 53.6 40 5 29.6 20 3 29.4 20 2 2.5 40 1 3.2 2 18 25.5 45 5 27.0 30 3 27.1 30 2 1.6 43 1 2.4 3 14 25.1 50 5 24.3 40 3 24.8 40 2 0.7 20 1 1.7 4 11 44.4 55 5 21.7 50 3 22.6 50 1 59.8 40 1 1.0 5 9 52.0 10 5 19.2 16 3 20.5 26 1 58.9 44 1 0.3 5 9 44.0 5 5 16.7 10 3 18.4 10 1 58.1 20 59.6 10 9 36.2 10 5 14.2 20 3 16.3 20 1 57.2 40 58.9 15 9 28.6 15 5 11.7 30 3 14.2 30 1 56.4 45 58.2 20 9 21.2 20 5 9.3 40 3 12.2 40 1 55.5 20 57.6 25 9 14.0 25 5 6.9 50 3 10.3 50 1 54.7 40 56.9 5 30 9 7.0 10 30 5 4.6 17 3 8.3 27 1 53.9 46 56.2 35 9 0.1 35 5 2.3 10 3 6.4 10 1 53.1 20 55.6 40 8 53.4 40 5 0.0 20 3 4.6 20 1 52.3 40 55.0 45 8 46.8 45 4 57.8 30 3 2.8 30 1 51.5 47 54.3 50 8 40.4 50 4 55.6 40 3 1.0 40 1 50.7 20 53.7 55 8 34.2 55 4 53.4 50 2 59.2 50 1 50.0 40 53.1 6 8 28.0' 11 4 51.2 18 2 57.5 28 1 49.2 48 52.5 5 8 22.1 5 4 49.1 10 2 55.8 20 1 47.7 49 50.6 10 8 16.2 10 4 47.0 20 2 54.1 40 1 46.2 50 48.9 15 8 10.5 15 4 44.9 30 2 52.4 29 1 44.8 51 47.2 20 8 4.8 20 4 42.9 40 2 50.8 20 1 43.4 52 45.5 25 7 59.3 25 4 40.9 50 2 49.2 40 1 42.0 53 43.9 6 30 7 53.9 11 30 4 38.9 19 2 47.7 30 1 40.6 54 42.3 35 7 48.7 35 4 36.9 10 2 46.1 20 1 39.3 55 40.8 40 7 43.5 40 4 35.0 20 2 44.6 40 1 38.0 56 39.3 45 7 38.4 45 4 33.1 30 2 43.1 31 1 36.7 57 37.8 50 7 33.5 50 4 31.2 40 2 41.6 20 1 35.5 58 36.4 55 7 28.6 55 4 29.4 50 2 40.2 40 1 34.2 59 35.0 7 7 23.8 12 4 27.5 20 2 38.8 32 1 33.0 60 33.6 5 7 19.2 5 4 25.7 10 2 37.4 20 1 31.8 61 32.3 10 7 14.6 10 4 23.9 20 2 36.0 40 1 30.7 62 31.0 15 7 10.1 15 4 22.2 30 2 34.6 33 1 29.5 63 29.7 20 7 5.7 20 4 20.4 40 2 33.3 20 1 28.4 64 28.4 25 7 1.4 25 4 18.7 50 2 32.0 40 1 27.3 65 27.2 7 30 6 57.1 12 30 4 17.0 21 2 30.7 34 1 26.2 66 25.9 35 6 53.0 35 4 15.3 10 2 29.4 20 1 25.1 67 24.7 40 6 48.9 40 4 13.6 20 2 28.1 40 1 24.1 68 23.6 45 6 44.9 45 4 12.0 30 2 26.9 35 1 23.1 69 22.4 50 6 41.0 50 4 10.4 40 2 25.7 20 1 22.0 70 21.2 55 6 37.1 55 4 8.8 50 2 24.5 40 1 21.0 71 20.1 8 6 33.3 13 4 7.2 22 2 23.3 36 1 20.1 72 18.9 5 6 29.6 5 4 5.6 10 2 22.1 20 1 19.1 73 17.8 10 6 25.9 10 4 4.1 20 2 20.9 40 1 18.2 74 16.7 15 6 22.3 15 4 2.6 30 2 19.8 37 1 17.2 75 15.6 20 6 18.8 20 4 1.0 40 2 18.7 20 1 16.3 76 14.5 25 6 15.3 25 3 59.6 50 2 17.5 40 1 15.4 77 '0 13.5 8 30 6 11.9 13 30 3 58.1 23 2 16.4 38 1 14.5 78 12.4 35 6 8.5 35 3 56.6 10 2 15.4 20 1 13.6 79 11.3 40 6 5.2 40 3 55.2 20 2 14.3 40 1 12.7 80 10.3 45 6 2.0 45 3 53.7 30 2 13.3 39 1 11.9 81 9.2 50 5 58.8 50 3 52.3 40 2 12.2 20 1 11.0 82 8.2 55 5 55.7 55 3 50.9 50 2 11.2 40 1 10.2 83 7.2 9 5 52.6 14 3 49.5 24 2 10.2 40 1 9.4 84 6.1 p 5 49.6 10 3 46.8 10 2 9.2 20 1 8.6 85 5.1 10 5 46.6 20 3 44.2 20 2 8.2 40 1 7.8 86 4.1 15 5 43.6 30 3 41.6 30 2 7.2 41 1 7.0 87 3.1 20 5 40.7 40 3 39.0 40 2 6.2 20 1 6.2 88 2.0 25 5 37.9 50 3 36.5 50 2 5.3 40 1 5.4 89 1.0 9 30 5 35.1 15 3 34.1 25 2 4.4 42 1 4.7 90 0.0 TABLE III. A. Correction of the Mean Refraction for the Height of the Barometer. Barometer. MEAN REFRACTION. Barometer. O' 1' 2' 3' 4' 5' 6' y, ' 9' 10' Subtract. "I ( I II Add. 30 31) 30 3 30 6' a'i :*o o so' 6' 30 6 3O 6 27.50 51 2 5 7 10 12 15 17 20 23 25 28 30 33 35 38 40 43 45 48 27.55 2 5 7 10 12 15 17 20 7! 25 27 30 32 35 37 40 42 45 47 50 27.60 2 5 7 10 12 14J17 19 24 27 29 31 34 36 39 41 44 40 49 27.65 2 5 7 9 12 14|l6 19 21 24! 26 28 31 33! 36 88 40 4,3 45 48 27.70 2 5 7 9 11 14 10 18 21 23 25 28 30 32 35 .37 39 42 44 47 27.75 2 4 7 9 11 13 16 18 20 23 25 27 29 32 ! 34 36 39 41 43 46 27.80 2 4 7 9 11 13 15 18 20 22 24 27 29 31i33 .35 38 4!) 42 45 27.85 2 4 G 9 11 13 15 17 19 22 24 26 28 3032 35 .37 39 41 44 27.90 2 . 4 6 8 10 13 15 17 19 21 23 25 27 30 32 34 .30 38 40 43 27.95 2 4 8 10 12 14 16 18 21 23 25 27 .29 31 33 35 37 39 42 28.00 2 4 6 8 10 12 14 16 18 20 22 24 26 28 .30 32 34 30 38 41 28.05 o 2 4 6 8 10 12 14 16 18 20 '2'2 24 25 27 29 31 33 ,35 37 39 28.10 2 4 6 8 9 11 13 15 17 14 21 23 25 27 29 31 .3.3 34 30 38 28.15 2 4 7 9 11 1.3 15 17 19 20 22 24 546 28 30 32 34 30 37 28.20 2 4 5 7 9 11 1,3 14 10 18 20 22 24 25 27 29 .31 3,3 35 36 28.25 2 a 5 7 9 10 12 14 16 18 19 21 2,3 25 20 28 30 32 34 35 28.30 2 3 5 7 8 10 12 14 15 17 19 21 22 24 20 27 29 31 33 34 28.35 2 .3 5 7 8 10 12 1.3 15 17 18 20 22 2 25 27 28 30 32 33 28.40 2 3 5 8 10 11 13 14 16 18 19 21 23J24 20 27 29 31 32 28.45 2 9 5 6 8 9 11 12 14 10 17 19 20 22 23 25 27 28 30 31 28.50 1 3 4 6 7 9 10 12 14 15 17 18 20 21 23 24 26 27 29 30 31.50 28.55 1 3 4 6 7 9 10 12 13 15 10 37 19 20 22 2.3 25 20 28 29 31.45 28.60 1 9 4 6 7 8 10 11 1.3 14 15 17 18 20 21 23 24 25 27 28 31.40 28.65 9 4 5 7 8 9 11 12 14 15 16 18 19 20 22 23 25 20 27 31.35 28.70 3 4 5 G 8 9 10 12 13 14 16 17 18 20 21 22 24 25 26 31.30 28.75 2 4 5 G 7 9 10 11 13 14 15 10 18 19 20 21 23 24 25 31.25 28.80 2 4 5 G 7 8 10 11 12 13 14 10 17 18 19 21 22 2.3 24 31.20 2885 2 8 5 7 8 9 10 12 1,3 14 15 10 17 19 20 21 22 23 31.15 28.90 2 3 4 9 7 8 9 10 11 12 1,3 14 16 17 18 19 20 21 22 31.10 28.95 2 8 4 5 6 7 8 9 11 12 13 14 15 10 17 18 19 20 21 31.05 29.00 2 ,3 4 5 6 7 8 9 10 11 Vt 1,3 14 15 10 17 18 19 20 31.00 29.05 2 8 4 5 6 7 8 9 10 11 11 12 13 14 15 10 17 18 19 30.95 29.10 2 a 4 4 5 G 7 8 9 10 11 12 1,3 14 15 15 16 17 18 30.90 29.15 2 3 3 4 5 6 7 8 9 9 10 11 12 1.3 14 15 15 10 17 30.85 29.20 2 2 3 4 5 G 6 7 8 9 10 10 11 12 1,3 14 15 15 16 30.80 29.25 2 a 4 4 5 6 7 8 8 9 10 11 11 12 13 14 14 15 30.75 29.30 2 3 3 4 5 6 G 7 8 8 9 10 11 11 12 13 13 14 30-70 29.35 2 3 a 4 5 5 G 7 7 8 9 9 10 10 11, 12 13 13 30.65 29.40 1 2 2 3 4 4 5 5 G 7 7 8 8 9 10 10 11 12 12 30.60 29.45 1 2 2 a 3 4 4 5 G 6 7 7 8 8 9 9 10 11 11 30.55 29.50 I 1 2 2 3 3 4 5 5 G G 7 7 8 8 9 9 10 10 30.50 29.55 1 1 2 2 3 3 4 4 5 5 5 6 G 7 7 8 8 9 9 30.45 29.60 1 1 2 2 2 3 3 4 4 4 5 5 G 6 G 7 7 8 8 30.40 29.65 1 1 1 2 2 2 3 a 4 4 4 5 5 5 G G 6 7 7 30.35 29.70 1 1 1 1 2 2 2 3 3 a 4 4 4 5 5 5 5 6 6 30.30 29.75 1 1 1 1 2 2 2 3 3 3 3 4 4 4 4 5 5 5 30.25 29.80 1 1 1 1 1 2 2 2 2 2 3 3 a 8 3 4 4 4 30.20 29.85 1 1 1 1 1 1 2 2 2 2 2 2 2 3 3 3 3 30.15 29.90 1 I 1 1 1 1 1 1 1 2 2 2 2 2 2 30.10 29.95 1 1 1 1 1 1 1 1 1 1 1 30.05 30.00 00 30.00 Subtract, 6' 30' 6' 30 6' 30 6' 36" H 30* o ai 6' 30 6' 30 6' 30 6' 3 6' Add. Barometer. 0' I' 2' 3' 4' 5' 6' 7' 8' 9' 10' MEAN REFRACTION. 11 81 TABLE III. B. Correction of the Mean Refraction for the Heisht of the Thermometer. Thermom. MEAN REFRACTION. Thermom. 0' 1' 2' 3' 4' 5' 6' ' 8' 9' 10 Add. 36 ;;ft o 36 Add. 10 i 4 6 II 12 ii 90 i 24 a 28 33 87 41 J -l8 46 5C 55 GO 05 70 75 80 85 -90 8 4 s 12 15 19 28 27 31 36 40 44 48 53 58 62 07 72 77 82 87 8 6 4 7 11 Ifi 19 22 26 30 34 38 42 47 51 55 60 04 09 74 79 84 6 - 4 4 7 11 14 18 22 25 29 33 37 41 45 49 53 57 62 00 71 70 80 4 2 o 3 7 10 14 17 21 24 28 31 35 39 43 47 51 55 59 04 OS 72 77 . . o Q 3 7 10 13 10 20 23 27 30 34 37 41 45 49 53 57 01 05 69 74 2 3 6 9 12 16 19 22 25 29 32 36 39 43 47 50 54 58 62 GO 70 2 4 3 G 9 12 15 18 21 24 28 31 34 37 41 44 48 52 55 59 03 67 4 6 3 6 B 11 H 17 20 23 20 29 32 30 39 42 40 49 53 50 00 64 6 8 3 5 S 11 14 10 19 22 25 28 31 34 37 40 43 47 50 54 57 61 8 10 3 5 8 10 13 15 18 21 24 20 29 32 35 38 41 44 48 51 54 58 10 11 2 5 7 10 13 15 18 20 23 20 28 31 34 37 40 43 40 49 53 56 11 . 12 2 5 7 10 12 15 17 20 22 25 28 30 33 36 39 42 45 48 51 54 12 13 2 5 7 9 12 14 17 19 22 24 27 30 32 35 38 41 44 47 50 53 13 14 2 5 7 9 11 14 10 19 21 24 26 29 31 34 37 40 42 15 48 51 14 15 2 4 7 9 11 13 16 18 20 |S 25 28 30 3 30 38 41 44 47 50 15 16 2 4 6 9 11 13 15 18 20 22 25 27 29 32 35 37 40 43 45 48 16 17 2 4 6 8 10 It 15 17 19 21 24 20 2; 31 33 36 '39 41 44 47 17 18 2 4 G 8 10 12 14 16 19 21 23 25 28 80 32 35 37 40 43 45 18 19 2 4 6 8 10 12 14 16 18 20 22 24 27 29 31 34 36 39 41 44 19 20 2 4 6 8 9 11 13 15 17 19 22 24 20 28 SO 33 35 37 40 42 20 21 2 4 5 7 9 11 13 15 17 19 21 23 25 27 29 31 34 30 38 41 21 22 2 3 5 7 9 11 12 14 16 18 20 22 24 26 28 30 32 35 37 39 22 23 2 3 5 7 8 10 12 14 15 17 19 21 23 25 27 29 31 33 30 38 23 24 2 3 5 G 8 10 11 13 15 17 18 20 22 24 20 28 30 32 34 36 24 25 2 3 5 G 8 g 11 13 14 1C 18 19 21 23 25 27 29 31 33 35 25 26 3 4 6 7 9 11 12 14 15 17 19 20 22 24 20 28 29 31 33 26 27 3 4 6 7 9 10 12 13 15 10 18 19 21 23 25 20 38 30 32 27 28 3 4 5 7 8 10 11 12 14 15 17 19 20 22 23 25 27 29 30 28 29 3 4 5 6 8 9 11 12 13 15 16 18 19 21 22 24 20 27 29 29 30 2 4 5 6 7 9 10 11 13 14 15 17 IS 20 21 23 24 20 28 30 31 Q 2 3 5 G 7 8 9 11 12 13 15 10 17 19 20 22 23 25 26 31 32 1 2 3 4 6 7 8 9 10 11 13 14 15 16 18 19 20 22 23 25 32 33 1 2 3 4 5 G 7 8 10 11 12 13 14 15 17 18 19 21 22 23 33 34 1 2 3 4 5 G 7 8 9 10 11 12 13 14 16 17 18 19 21 22 34 35 2 3 4 5 6 G 7 8 9 10 11 13 14 15 10 17 18 19 20 35 36 2 3 3 4 5 6 7 8 9 10 11 12 13 14 15 10 17 18 19 36 37 2 2 3 4 5 6 6 7 8 9 10 11 12 13 14 15 16 17 18 37 38 2 3 4 4 5 6 7 7 8 9 10 11 12 13 13 14 15 16 38 ' 39 2 3 a 4 5 5 6 7 8 8 9 10 11 11 12 13 14 15 39 40 2 2 a 4 4 5 G 6 7 8 S 9 10 10 11 12 13 13 40 41 2 2 3 3 4 4 5 6 G 7 7 8 9 9 10 11 11 12 41 42 1 2 2 3 3 4 4 5 5 6 7 7 8 8 9 9 10 11 42 43 1 2 2 3 3 3 4 4 5 5 6 6 7 7 8 8 9 9 43 44 1 1 2 2 a 3 3 4 4 4 5 5 6 6 7 7 8 8 44 45 1 1 1 1 2 2 2 a 3 3 4 4 4 5 5 G 6 7 45 46 1 1 1 1 2 2 2 2 2 3 3 4 4 4 4 5 5 5 46 47 1 1 1 1 1 1 2 2 2 2 2 3 3 3 3 4 4 4 47 48 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 3 48 49 1 1 1 1 1 1 1 1 1 1 1 1 49 50 50 Add. "WASHINGTON, D. C., Oct. 20, 1862. ) "This system of Heavy Artillery Tactics, prepared under direction of the War De- partment, having been approved by the President, is adopted for the instruction of troops when acting as heavy artillery. EDWIN M. STANTON, Secretary of War," w The First Part consists of sixteen lessons relating to the service of the single piece, in- cluding the gun, howitzer, mortar, and columbiad ; also, the formation of batteries, the art of aiming pieces and firing hot-shot. Part Second relates entirely to mechanical manoeu- vres, and appliances for handling, mounting, dismounting, and transporting heavy pieces. Part Third is of a miscellaneous cnaracter, containing directions for embarking and disem- barking artillery and ordnance stores; also, tables of dimensions and weights of guns, carriages, shot, shell, machines, and implements, with charges for, and ranges of heavy artillery. These instructions are not only copious in detail, but aptly illustrated with thirty-nine elegant steel-plate engravings." Bulletin. Roberta's Hand-Book of Artillery. For the Service of the United States Army and Militia. New revised and greatly enlarged edition. By Major JOSEPH ROBERTS, U. S. A. 1 vol. ISmo, cloth. $1.25. "A complete catechism of gun practice, covering the whole ground of this branch of military science, and adapted to militia and volunteer drill, as well as to the regular army. It has the merit of precise detail, even to the technical names of all parts of a gun, and how the smallest operations connected with its use can be best performed. It has evidently been prepared with great care, and with strict scientific accuracy." New York Century. Duauc's Manual for Engineer Troops. Consisting of Part I., Pontoon Drill ; II., Practical Operations of a Siege ; III , School of the Sap ; IV., Military Mining ; V., Construction of Batteries. By Major J. C. DUANE, Corps of Engineers, U. S. Army. 1 vol. 12mo, cloth. $2.50. "I have carefully examined Capt. J. C. Duane's 'Manual for Engineer Troops," 1 and do not hesitate to pronounce it the very best work on the subject of which it treats. "H. W. HALLECK, Major- General, U. S. A:" 1 Diifoiir's Principles of Strategy and Grand Tactics. Translated from the French of General G. H. Dufour. By WILLIAM P. CRAIGHILL, Capt. of Engineers, U. S. Army, and Assistant Professor of Engineering, U. S. Military Academy, West Point. From the last French Edition. Illustrated. In one volume 12mo. cloth. $3.00. " In all military matters General Dufour is recognized as one of the first authorities fa Europe, and consequently the translation of this very valuable work is a most acceptable addition to our military libraries." London Naval and Military Gazette. 11 D. Van Nostrandl s Publications. Iiitructions for Field Artillery. Prepared by a Board of Artillery Officers. 1 voL 12mo, illustrated by 122 pages of Engravings. Cloth. $3.00. "WAR DEPARTMENT, WASHINGTON, March, 1, 1868. "This system of Instruction for Field Artillery, prepared under direction of the War Department, having been approved by the President, is adopted for the instruction of troops when acting as field artillery. " Accordingly, instruction in the same will be given after the method pointed out therein ; and all additions to or departures from the exercise and manoeuvres laid dowu in the system, are positively forbidden. "EDWIN M. STANTON, Secretary of War." Anderson's Evolutions of Field Batteries of Artil- lery. Translated from the French, and arranged for the Army and Militia of the United States. By Gen. ROBERT ANDERSON, U. S. A. Published by order of the War Department. 1 vol., cloth, 32 plates. $1. " WAR DEPARTMENT, Nov. 2d, 1859. "The system of 'Evolutions of Field Batteries,' translated from the French, and ar- ranged for the service of the United States, by Major Kobert Anderson, of the 1st Begi- ment of Artillery, having been approved by the President, is published for the informa- tion and government of the army. "All Evolutions of Field Batteries not embraced in this system are prohibited, and those herein prescribed will be strictly observed. J. B. FLOYD, "Secretary of War." Mendel 1's Treatise on Military Surveying. Theoretical and Practical, including a Description of Surveying Instruments. By G. H. MENDELL, Captain of Engineers. 1 vol. 8vo, with numerous illus- trations, cloth. $2.50. "The author is a Captain of Engineers, and has for his chief authorities Salneuve, Lalo- bre, and Simms. He has presented the subject in a simple form, and has liberally illus- trated it with diagrams, that it may be readily comprehended by every one who is liable to be called upon to furnish a military sketch of a portion of country." N&io York Evening Post. Viele's Hand-book. Hand-Book for Active Service, containing Practical Instructions in Campaign Duties. For the use of Volunteers. By Brigadier-General Egbert L. Viele, U. S. A. 12mo, cloth. $1. M It is a thorough treatise, copiously illustrated, and embraces a complete drill by com- pany, regiment, &c. It also embraces instructions in regard to the camp, fortifications, rations, and mode of cooking them, and has a manual for light and heavy artillery." New Haven Palladium. A Treatise on the Camp and March. "With which is connected the Construction of Field- Works and Military Bridges ; with an Appendix of Artillery Ranges, &c. For the use of Volunteers and Militia in the United States. By Captain Henry D. Grafton, U. S. A. 1 voL 12mo. cloth. 75 cents. 12 D. Van Nostrand? s Publications. It i The Automaton Regiment; or, Infantry Soldier's Practical Instructor. For all Regimental Movements in the Field, By G-. Douglas Brewerton, U. S. Army. Neatly put up in boxes, price $1 ; when sent by mail, $1.40. The "Automaton Regiment" is a simple combination of blocks and counters, so arranged and designated, by a carefully considered contrast of colors, that it supplies the student with a perfect miniature regiment, in which the position in the battalion of each company, and of every officer and man in each division, company, platoon, and section, is clearly indicated. It supplies the studious soldier with the means whereby he can consult his "tactics," and at the same time join practice to theory by manoeuvring a mimic regiment. I hereby certify that I have examined the " Automaton Regiment," invented by GL Douglas Brewerton, late of the United States Regular Army, and now serving as a Vol- unteer Aide upon my military staff, and believe that his invention will prove a useful and valuable assistant to every student of military tactics. I take pleasure in recom- mending it accordingly. B. SAXTON, Brigadier- General Volunteers. The Automaton Company; or, Infantry Soldier's Practical Instructor. For all Company Movements in the Field. By G-. Douglas Brewerton, U. S. A. Price in boxes, $1.25 ; when sent by mail, $1.95. The Automaton Battery; or, Artillerist's Practical Instructor. For all Mounted Artillery Manoeuvres in the Field. By G-. Douglas Brewerton, U. S. A. Price in boxes, $1 ; when sent by mail, $1.40. These productions are of a similar character, and cannot fail to be of great value to the military student. They are object lessons, that will teach more in an hour than mere rerbal instruction could in a month. They cannot be too highly commended to both officers and men. Commercial Advertiser. Monroe's Company and Skirmish Drill. The Company Drill of the Infantry of the Line, together with the Skirmish Drill' of the Company and Battalion, after the method of G-eneral Le Louterel. Bayonet Fencing ; with a Supplement on the Handling and Service of Light In- fantry. By J. Monroe, Colonel 22d Regiment, N. G-., N. Y. S. M., for- merly Captain U. S. Infantry. 1 vol. 32mo, cloth. 75 cents. This is a most valuable and timely little manial. It should be in the hands of every new recruit. Chicago Tribune. School of the Guides. Designed for the use of the Militia of the United States. By Colonel Eugene Le Gal, 55th Regiment, N. Y. S. M. cloth, 60 cents. " This excellent compilation condenses into a compass of less than sixty pages all the Instruction necessary for the guides, and the information being disconnected with other matters, is more readily referred to and more easily acquired." Louisville Journal. L- i? D. Van Nostrarid? s Publications. Craighill's Army Officer's Pocket Companion. Princi- pally designed for Staff Officers in the Field. Partly translated from the French of M. DE ROUVRE, Lieutenant- Colonel of the French Staff Corps, with Additions from standard American, French, and English Authorities. By T\ r M. P. CRAIGHILL, First Lieutenant U. S. Corps of Engineers, Assist. Prof, of Engineering at the U. S. Military Academy, West Point. 1 vol. 18mo, full roan. $2.00. " I have carefully examined Capt. Craighill's Pocket Companion. I find it one of the very best works of the kind I have ever seen. Any Army or Volunteer officer who will make himself acquainted with the contents of this little book, will seldom be ignorant of his duties in camp or field. II. W. HALLECK, Major- General U. S. A." Hunter's Manual for Quartermasters and Commis- saries. Containing Instructions in the Preparation of Touchers, Ab- stracts, Returns, etc., embracing all the recent changes in the Army Eegulations, together with instructions respecting Taxation of Salaries, etc. By Captain R. F. HUNTER, late of the U. S. Army. 12mo, cloth, $1.25. Flexible morocco, $1.50. "This is the only work of the kind extant. It is based on the latest regulations of the War Department, and will be regarded as authority by those officers for whose use it is designed." Saturday Evening Gazette. Ordronaux's manual of Instructions for Military Surgeons, in the Examination of Recruits and Discharge of Sol- diers. With an Appendix, containing the Official Regulations of the Provost-Marshal General's Bureau, and those for the formation of the In- valid Corps, etc., etc. Prepared at the request of the United States Sanitary Commission. By JOHN ORDRONAUX, M. D., Professor of Medical Jurisprudence in Columbia College, New York. 12mo. Half morocco. $1.50. " In a condensed form, it is an admirable treatise on the important subjects of which it treats. The author has aimed to be brief without being obscure, to omit nothing of real importance, and to draw his materials from the best sources. He treats of the physical disabilities which have relation to the military service, and of these alone. Medical Ex- aminers are instructed in their duties, and the method of discovering feigned, artificially produced, and concealed diseases is pointed out The book will prove valuable to all who are concerned in the manipulation of recruits or conscripts. An Appendix contains official regulations and instructions relative to the Provost-Marshal's office, the Invalid j Corps, etc." Commercial Advertiser. \ Ordronaux's Hints on the Preservation of Health in Armies. For the use of Volunteer Officers and Soldiers. By JOHN ORDRONAUX, M. D. New edition, 18mo, cloth. 75 cents. 14 D. Van No sir and? s Publications. Thomas's Rifled Ordnance. A Practical Treatise on the Ap- plication of the Principle of the Rifle to Guns and Mortars of every Calibre. To which is added, a new theory of the initial action and force of Fired Gunpowder. By LYNALL THOMAS, F. R. S. L. Fifth edition, revised. One volume, octavo, illustrated, cloth- $2.00. "At a time when the manufacture of guns engrosses the attention of thousands on thousands, any practical treatise which may suggest desirable alterations or innovations is of importance, and deserves that attention we doubt not will be extended to the pres- ent volume." Boston Evening Gazette. Wilcox's Rifles and Rifle Practice. An Elementary Trea- tise on the Theory of Rifle Firing ; explaining the causes of Inaccuracy of Fire and the manner of correcting it ; with descriptions of the Infan- try Rifles of Europe and the United States, their Balls and Cartridges. By Captain C. M. WILCOX, U. S. A. New edition, with engravings and cuts. Green cloth. $2.00. ! " The book will be found intensely interesting to all who are watching the changes in the art of war arising from the introduction of the new rifled arms. We recommend to our readers to buy the book." Military Gazette. Lcmly's Maxims and Instructions on the Art of War. Maxims, Advice, and Instructions on the Art of War ; or, A Practical Military Guide for the use of Soldiers of all Arms and of all Countries. Translated from the French by Captain LENDY, Director of the Practical Military College, late of the French Staff, etc., etc. 1 vol. 18mo, cloth. 75 cents. "This book treats generally of the art of war and the conduct of campaigns, and with- out going into all the details of a soldier's business, aims to explain the principles on which an army may be well established in camp, or successfully led and mano3uvred on the field." Providence Journal. Andrews's Hints to Company Officers oil their Mili- tary Duties. By Captain C. C. ANDREWS, Third Regiment Minne- sota Volunteers. 1 vol. 18rno, cloth. 60 cents. "This is a hand-book of good practical advice, which officers of all ranks may study with advantage.'' Philadelphia Press. Ileth's System of Target Practice. For the use of Troops when armed with the Musket, Rifle-Musket, Rifle, or Carbine. Prepared principally from the French, by Captain Henry Heth, 10th Infantry, TJ S. A. 18mo, cloth. 75 cents. 15 D. Van No sir and} s Publications. Miiiifie's Mechanical Drawing. A Text-Book of Geometrical Drawing, for the Use of Mechanics and Schools, in which the Definitions and Rules of Geometry are familiarly explained; the Practical Prob- lems are arranged from the most simple to the more complex, and in their description technicalities are avoided as much as possible. With Illus- trations for Drawing Plans, Sections, and Elevations of Buildings and Machinery; an introduction to Isometrical Drawing, and an Essay on Linear Perspective and Shadows. Illustrated with over 200 Diagrams engraved on Steel. By WILLIAM MINIFIE, Architect. Seventh edition. With an Appendix on the Theory and Application of Colors. 1 vol. 8vo, cloth. $4.00. " It is the best work on Drawing that we have ever seen, and is especially a text-book of Geometrical Drawing for the use of Mechanics and Schools. No young Mechanic, such as a Machinist, Engineer, Cabinet-Maker, Millwright, or Carpenter, should be without it. 1 ' Scientific American. "One of the most comprehensive works of the kind ever published, and cannot but possess great value to builders. The style is at once elegant and substantial." Penn- sylvania Inquirer. "We think this the best work on this subject, which is saying very much ; as much attention has been given to the science of Drawing. There is nothing in the range of drawing that cannot be found in this book, and which is not well explained." Ohio Teacfter. u Whatever is said is rendered perfectly intelligible by remarkably well executed dia- grams on steel, leaving nothing for mere vague supposition ; and the addition of an introduction to isometrical drawing, linear perspective, and the projection of shadows, winding up with a useful index to technical terms." Glasgow Mechanic's Journal. Minified Geometrical Drawing. Abridged from the Octavo edition, for the use of Schools. Illustrated with 48 Steel Plates. Fifth edition. 1 vol. 12mo, half roan. $1.50. Peirce' System of Analytic Mechanics. Physical and Ce- lesrial Mechanics, by BENJAMIN PEIRCE, Perkins Professor of Astronomy and Mathematics in Harvard University, and Consulting Astronomer of the American Ephemeris and Nautical Almanac. Developed in four sys- tems of Analytic Mechanics, Celestial Mechanics, Potential Physics, and Analytic Morphology. 1 vol 4to ( cloth. $10.00. Dictionary of Weights and Measures. Universal Dictionary of Weights and Measures, Ancient and Modern, reduced to tie standards of the United States of America. By J. H. ALEXANDER. New edition, enlarged. 1 vol. 8vo, cloth. $2 .50 16 14 DAY USE RETURN TO DESK FROM WHICH BORROWED ASTRONOMY, MATHE.VIATICS- STATISTiCS LIBRARY This book is due on the last date stamped oelow, or on the date to which renewed. Renewed books are subject to immediate recall. LD 21-50w-4,'63 (D6471slO)476 General Library University of California Berkeley CD375M471D 812165 UNIVERSITY OF CALIFORNIA LIBRARY