18 
ASTRONOMICAL OBSERVATIONS. 
APPENDIX A—Continued. 
CAMP 4S W—OCTOBER 3, 1855—Continued. 
Observer-— Lieut. R. S. Williamson, U. S. Top. Engineers. 
Object observed. 
Time of observ’n 
by watch. 
Observed double 
altitudes. 
h . 
m . 
S . 
d . 
on . 
s. | 
Allair. 
7 
00 
35.2 
109 
14 
40 
7 
01 
18.8 
109 
14 
30 
7 
01 
59.6 
109 
14 
30 
7 
02 
45.2 
109 
14 
30 
7 
03 
22.0 
109 
14 
40 
7 
04 
00.8 
109 
14 
00 
7 
04 
32.8 
109 
13 
30 
7 
05 
22.4 
109 
13 
10 
Index error, — 5' 00". Barometer, 29.1 in. Thermome¬ 
ter, 56°. 
CAMP 49 W—OCTOBER 4, 1855. 
Observer —Lieut. R. S. Williamson — U. S. Top. Engineers. 
Polaris. 
h . 
on . 
s. 
d . 
m . 
s . 
7 
05 
45.6 
89 
28 
10 
7 
06 
42.4 
89 
28 
30 
7 
07 
59.2 
89 
29 
10 
7 
09 
01.2 
89 
30 
10 
7 
10 
09.2 
89 
31 
20 
7 
11 
29.6 
89 
32 
00 
h . 
m . 
s . 
d . 
on . 
s . 
Polaris... 
7 
ii 
24.0 
88 
56 
20 
7 
12 
36.0 
88 
58 
00 
7 
13 
21.6 
88 
58 
10 
7 
14 
10.0 
88 
58 
20 
7 
15 
39.2 
89 
00 
20 
7 
17 
48.4 
89 
01 
20 
7 
19 
30.4 
89 
02 
30 
7 
20 
30.0 
89 
03 
30 
7 
21 
32.4 
89 
04 
30 
7 
22 
41.2 
89 
05 
10 
Altair... 
6 
52 
45.2 
108 
48 
20 
6 
53 
30.8 
108 
49 
00 
6 
54 
26.0 
108 
49 
20 
6 
55 
07.6 
108 
50 
10 
6 
56 
25.6 
108 
50 
40 
6 
57 
26.0 
108 
51 
10 
6 
58 
14.8 
108 
51 
20 
6 
59 
(10.0 
108 
51 
20 
6 
59 
48.8 
108 
51 
20 
7 
00 
46.8 
108 
51 
00 
7 
02 
38.4 
108 
49 
50 
7 
03 
23.2 
108 
48 
40 
Index error,—5'00". Barometer, 29.4 in. Thermometer, 
66 °. 5 . 
CAMP 50 W—OCTOBER 5, 1855. 
Observer —Lieut. R. S. Williamson, U. S. Top. Engineers. 
CAMP 50 W—OCTOBER 5, 
1855— 
Continued. 
Observer —Lieut R. S. Willia 
MS ON, U. S. 
Top. Engine 
ers. 
Object observed. Time 
of observ’n 
Observed double 
by watch. 
altitudes. 
1 h. 
in. 
s. 
d. 
m. 
s. 
Polaris. 7 
12 
18.4 
89 
32 
40 
7 
13 
28.0 
89 
33 
40 
7 
14 
26.0 
89 
34 
20 
7 
15 
34.8 
89 
35 
00 
Altair. 6 
49 
22.4 
108 
16 
20 
6 
-50 
Hi.8 
108 
17 
20 
6 
51 
01.6 
108 
17 
00 
6 
51 
52.8 
108 
17 
50 
6 
52 
42.8 
108 
18 
10 
6 
53 
26.0 
108 
17 
50 
6 
54 
02.0 
108 
18 
10 
6 
54 
38.0 
108 
17 
50 
6 
55 
32.4 
108 
18 
00 
6 
56 
58.0 
108 
18 
00 
6 
57 
48.0 
108 
17 
20 
6 
58 
31.2 
108 
16 
40 
6 
59 
10.4 
108 
16 
10 
Index error, —5'00”. Barometer, 29.6 in. Thermometer, 
57°. 
CAMP 51 W—OCTOBER 6, 1855. 
Observer —Lieut. R. S. Williamson, U. S. Top. Engineers. 
h . 
on 
s . 
d . 
on . 
s . 
Polaris. 
6 
59 
33.2 
90 
09 
40 
7 
00 
59.6 
90 
11 
00 
7 
01 
53.2 
90 
11 
30 
7 
02 
50.0 
90 
12 
30 
7 
03 
46.4 
90 
12 
50 
7 
04 
58.8 
90 
14 
10 
7 
06 
09.2 
90 
14 
50 
7 
06 
53.2 
90 
15 
20 
7 
07 
48.4 
90 
16 
00 
7 
08 
52.4 
90 
17 
00 
Altair. 
6 
43 
15.2 
107 
33 
00 
6 
44 
33.2 
107 
34 
10 
6 
45 
26.0 
107 
34 
30 
6 
46 
11.2 
107 
34 
30 
6 
46 
52.4 
107 
34 
40 
6 
47 
42.0 
107 
34 
50 
6 
48 
28.0 
107 
35 
00 
6 
49 
03.6 
107 
35 
10 
6 
50 
08.2 
107 
35 
10 
6 
50 
58.8 
107 
35 
20 
6 
51 
58.8 
107 
35 
00 
6 
53 
09.6 
107 
34 
50 
6 
54 
00.4 
107 
34 
30 
6 
55 
04.4 
107 
33 
00 
6 
55 
44.8 
107 
33 
00 
Index error, —5' 00". 
500.5. 
Barometer 
, 29.7 in. Thermometer, 
