40 RECONNAISSANCE FROM CARROLL, MONTANA, 
Observation for time. 
Station, Camp Lewis, Montana.. eats z uly 25, 1875.—Object observed, Altair.—Ref. Circle, Gambay and Son, 212.—Chronometer, Bond & Son, 
2.—Observer, Wood .—Computer, Wood.—Bar., 25i,95.—Ther., 58°. 
Double altitudes observed. Corresponding times. ees 
Latitude = L = 47 03 40 o fou 
OP Ue hom  & N. polar dist. =A = 81 27 35 Refraction = R = 63 
18 11 45. True altitude=A = 39 22 52 Parallax = P = 
12 30.5 —_-—_ Semi-diam.=Sd = 
13 32, 2Qm=—L4+A+A = 167 54 07 R, P, and Sd = 
14 28.5 Observed 2 alt. = 78 47 50 
15 20. m = 83 57 03 Index error = 
15 55.5 m—A = 44 34 11 ———_-. 
16 34.5 2 alt. corrected = 78 47 50 
17° 38.5 log cos m = = 9. 0227658 —_—_——__ 
720 00 00 18 31.5 log sin (m—A) = = 9. 8461989 Altitude = 39 23 55 
67 58 20 18 19 20.5 — R, P, and Sd — 1 03 
See. ——_— log cos m sin (m—A) = 18. 8689647 ————. 
187 58 20 18 15 33.6 log cos L sin A = 9. 8284436 True alt. = A = 39 2 52 
78 47 50 log sin? 4 p = 19. 0405211 log cos L = 9, 8332861 
log sin A = 9.9951575 
log sin 3 p = 9.5202605 —__—_- 
. MOE a log cos L sin A = 9, 8284436 
tp = 19 20 58 
p in are = 38 41 56 
hom 8. 
p in time = 2 34 47.7 
* AR = 19 44 43.8 
Equation of time = 
True time = 17 09 561 
Time by chron. = 18 15 33.6 
Chron. fast = 1 05 37.5 
Observation for time. 
Station, Camp Lewis, Montana.—Date, July 25, 1875.—Object observed, Arcturus.—Ref. Circle, Gambay & Son, 212.—Chronometer, Bond & 
Son, 202. ~ Observer, Wood. —Computer, Wood.—Bar., 25'.95.—Ther., 58°. 
° ‘ “ o Ff “ 
Double altitudes observed. Corresponding times. Latitude=—L = 47 03 40 Refraction =R = 50 
- N. polar dist =A = 7 10 00 Parallax =P = 
Oy ot hom 8. True altitude=—A = 46 36 46 Semi-diam.=Sd = 
17 56 00. ——— R, P, and Sa = 
59 00. Qm=L+A+L+A = 163 50 26 Observed 2 alt = 93 15 13 
59 54.5 —_—_ — Index error = - 
18 01 19.5 m = 81 5 13 a 
te z 5 m—A = 35 18 2&7 Qalt. corrected = 93 15 13 
720 00 00 04 13. 5 log cos m = = 9. 1473335 Altitude = 46 37 36 
212 32 10 05 OL. Jog sin (m—A) = 9. 7619011 R, P, and Sad = 50 
—_—_— 06 09. — — —_——. 
932 32 10 18 07 02. log cos m sin (m—A) = 18. 9097346 True alt. =A = 46 36 46 
—_——_— —_—_— log cos L sin A = = 9, 8067296 : 
93 15 13 18 02 25.5 —_——— log cos L = 9, 8332861 
log sin? 4 p = 19. 1030050 log sin A = 9.973435 
log sind p =  9,5515025 log cos LainO = _ 9,8067296 
° ty “ 
ip = 20 51 29 
p in are = 41 42 54 
hom. 8 
pin time = 2 46 51.6 
KR = 14 09 59.2 
Equation of time = 
True time = 16 56 50.8 
Time by chron. = 18 02 2.5 
Chron. fast = 1 0 347 
