48 
Observation for time. 
RECONNAISSANCE FROM CARROLL, MONTANA, 
Station, Camp Baker, Montana.—Date, August 5, 1875.—Object observed, Altair.—Ref. circle, Gambay & Son, 212.—Chronometer, Bond & 
Sons, 202.—Observer, Wood.—Computer, Wood.—Bar., 25'2.30,—Ther., 53°. 
Double altitudes observed. 
fo} t “ 
86 53 30 
720 00 00 
806 53 30 
80 41 21 
40 19 44 
Corresponding times. 
nD 
an 
Cc 
aay 
am 
re) 
o 
Peo Colon ties Saco S 
ann na a 
18 27 47.6 
Latitude = L = 
N. polar dist. = A = 
True altitude=A = 
2m=L+A4A = 
m = 
m—A = 
log cos m = 
log sin (m—A) = 
log cos m sin (m—A) = 
log cos Lsin A = 
log sin? 4p = 
log sin 4p 
aD = 
p in are = 
p in time = 
KR = 
True time = 
Time by chron. 
Chron. fast = 
fe} t 
46 40 
gl 37 
40 19 
168 27 
"ed 13 
43. 54 
“ 
40 
33 
44 
ST 
58. 5 
14.5 
9. 0021000 
9. 8410167 
18, 8431167 
9. 8315447 
“19.0115720 
9. 5057860 
oo: 
18 41 
37 22 
h. m. 
2 29 
19 44 
“ 
29 
58 
8. 
31. 87 
43.9 
17:15 
18 27 
12, 
47.6 
1 12 
Observation for time. 
35. 6 
Refraction = R 
Parallax = P 
Semi-diam. = $d 
R, P, and Sd 
Observed 2 alt. 
Index error 
2 alt. corrected 
Altitude 
R, P, and Sd 
True alt. =A 
log cos L 
log sin A 
log cos L sin A 
WT a th 
tl 
56. 8 
9. 8363878 
9. 9951569 
9. 8315447 
Station, Camp Baker, Montana.—Date, August 5, 1875.—Object observed, Arcturus.—Ref. circle, Gambay & Son, 212,—Chronometer, Bond & 
Son, 202.—Observer, Wood.—Computer, Wood.—Bar., 25'2.30.—Ther., 53°. 
fo} t wn 
Double altitudes observed. 
° fe At 
68 49 30 
720 00 00 
10)788 49 30 
78 52 57 
39 25 30 
Corresponding times. 
hom. 8. 
18 51 44. 
18 54 39.95 
Latitude = L 
N. polar dist. = A 
True altitude = A 
HAL Al 
2m=L+A+4A 
Il 
™m 
m—A 
Ill 
log cos m 
log sin (m—A) 
log cos msin (m—A) = 
log cos L sin A = 
ll 
log sin? 4p 
Il 
log sin 4 p 
ap 
p in are 
pin time 
KR 
rll 
True time 
Time by chron. 
Chron. fast = 
46 40 
70 10 
39 25 
156 16 
78 08 
38 42 
40 
00 
30 
10 
05 
35 
9. 3130467 
9. 7961406 
19. 1091873 
9. 8098313 
19, 2993560 
~ 9, 6496780 
oo: 
26 30 
53 O01 
hom. 
3 32 
14 09 
“ 
36 
12 
8. 
04.8 
59.1 
17 42 
18 54 
03.9 
39, 95 
1 12 
36.0 
Refraction = R 
Parallax = P 
Semi-diam. = Sd 
R, P, and Sd 
Observed 2 alt. 
Index error 
2 alt. corrected 
Altitude 
R, P, and Sd 
True alt. =A 
log cos L 
log sin A 
log cos L sin A 
WW aT 
ll 
uy 
58 
C. 8363878 
9. 9734435 
9, 8098313 
