ASTRONOMICAL OBSERVATIONS. 
15 
APPENDIX A—Continued. 
CAMP S—SEPTEMBER 19, 1855 
Observer — Lieut. R. S. Williamson, U. S. Top. Engineers. 
Object observed. Time of observ’n 
by watch. 
Observed double 
altitudes. 
: ft. 
m. 
s . 
d. 
m. 
Polaris... 8 
ii 
59.2 
89 
23 
20 
8 
13 
54.4 
89 
24 
40 
8 
15 
01.2 
89 
25 
00 
8 
16 
00.4 
89 
26 
10 
8 
17 
23.2 
89 
27 
10 
8 
18 
52.4 
89 
27 
40 
8 
20 
40.0 
89 
28 
50 
8 
22 
07.2 
89 
30 
10 
8 
23 
27.6 
89 
31 
20 
8 
25 
02.8 
89 
31 
30 
Altair. 7 
42 
13.6 
108 
22 
40 
7 
43 
16.0 
108 
23 
50 
7 
44 
08.0 
108 
24 
40 
7 
45 
06.8 
108 
25 
40 
7 
46 
09.2 
108 
26 
20 
7 
47 
03.6 
108 
27 
10 
7 
48 
08.8 
108 
28 
10 
7 
49 
23.6 
108 
28 
20 
7 
50 
27.6 
108 
28 
40 
7 
51 
28.8 
108 
28 
40 
7 
52 
31.2 
108 
27 
40 
7 
53 
52.8 
108 
27 
50 
7 
55 
02.0 
108 
25 
50 
7 
56 
03.2 
108 
26 
20 
7 
56 
50.0 
108 
25 
10 
7 
57 
45.2 
108 
24 
50 
7 
58 
46.0 
108 
23 
50 
7 
59 
28.8 
108 
22 
40 
Index error—5'20". Barometer, 26.9 in. Thermometer, 
540. 
CAMP S—SEPTEMBER 20, 1855. 
Observer — Lieut. R. S. Williamson, U. S. Top. Engineers. 
h. 
m . 
s. 
d. 
m. 
s. 
Sun’s lower limb....... 
ii 
50 
20.0 
93 
07 
40 
ii 
51 
10.4 
93 
08 
20 
ii 
51 
42.4 
93 
08 
30 
ii 
52 
28.4 
93 
09 
00 
ii 
53 
22.0 
93 
09 
00 
ii 
54 
04.4 
93 
09 
00 
ii 
54 
28.0 
93 
09 
00 
u 
55 
03.2 
93 
09 
00 
ii 
55 
31.6 
93 
09 
00 
ii 
56 
07.2 
93 
09 
00 
ii 
56 
40.4 
93 
08 
40 
n 
57 
25.2 
93 
08 
30 
ii 
58 
14.0 
93 
08 
20 
ii 
58 
43.2 
93 
07 
40 
Polaris................ 
7 
19 
56.0 
88 
47 
00 
7 
21 
44.8 
88 
48 
10 
7 
23 
08.8 
88 
49 
00 
7 
24 
27.2 
88 
50 
20 
7 
25 
32.4 
88 
51 
20 
7 
26 
39.6 
88 
52 
00 
7 
27 
50.8 
88 
53 
10 
7 
28 
44.8 
88 
54 
00 
7 
29 
34.8 
88 
54 
40 
7 
30 
23.6 
88 
55 
00 
7 
31 
14.0 
88 
55 
40 
7 
32 
41.6 
88 
56 
30 
CAMP S—SEPTEMBER 20 
1855- 
-Continued. 
Observer —Lieut. R. S. Williamson, U. S. Top. Engine 
ers. 
Object observed. 
Time of observ’n 
Observed double 
by watch. 
altitudes. 
h. 
in. 
s. 
d 
in. 
s. 
Altair ....... 
7 
39 
44.8 
108 
24 
30 
7 
40 
42.0 
108 
25 
50 
7 
41 
32.8 
108 
26 
00 
7 
42 
43.6 
108 
26 
30 
7 
43 
31.2 
108 
27 
00 
7 
44 
48.0 
108 
27 
30 
7 
45 
27.6 
108 
28 
00 
7 
46 
23.2 
108 
28 
10 
7 
47 
25.6 
108 
28 
00 
7 
48 
36.0 
108 
28 
00 
7 
49 
42.0 
108 
27 
10 
7 
50 
27.2 
108 
27 
00 
7 
51 
24.4 
108 
26 
40 
7 
52 
23.6 
108 
26 
20 
7 
53 
10.4 
108 
25 
20 
7 
54 
11.2 
108 
24 
20 
Index error — 5' 40". 
Barometer, 26.9 in. Thermome- 
ter, 54°. 
CAMP S—SEPTEMBER 21, 1855. 
Observer —Lieut. R. S. Williamson, U. S. Top. Engineers. 
ft. 
m. 
s. 
d. 
m. 
S . 
Sun’s lower limb....... 
11 
49 
38.8 
92 
21 
30 
11 
50 
12.4 
92 
21 
50 
11 
50 
42.8 
92 
22 
00 
11 
51 
30.0 
92 
22 
20 
11 
52 
15.2 
92 
22 
40 
11 
52 
53.2 
92 
22 
40 
11 
53 
24.8 
92 
22 
40 
11 
54 
30.8 
92 
22 
40 
11 
55 
17.2 
92 
22 
30 
11 
56 
08.0 
92 
22 
10 
11 
56 
52.8 
92 
22 
10 
11 
57 
24.8 
92 
21 
40 
11 
58 
08.8 
92 
21 
40 
11 
58 
49.6 
92 
21 
30 
Polaris..... 
7 
19 
18.8 
88 
50 
10 
7 
20 
22.0 
88 
50 
30 
7 
21 
24.0 
88 
51 
20 
7 
22 
07.2 
88 
51 
40 
7 
23 
09.6 
88 
52 
20 
7 
24 
12.0 
88 
53 
10 
7 
25 
02.8 
88 
53 
30 
7 
26 
09.6 
88 
54 
30 
7 
27 
05.2 
88 
55 
10 
7 
28 
03.2 
88 
56 
00 
7 
29 
30.0 
88 
57 
10 
7 
30 
26.8 
88 
58 
00 
7 
31 
19.2 
88 
59 
30 
7 
32 
25.6 
88 
59 
50 
7 
33 
38.8 
89 
00 
40 
7 
34 
40.0 
89 
01 
10 
7 
35 
40.0 
89 
02 
00 
7 
36 
27.6 
89 
03 
20 
7 
37 
11.2 
89 
03 
30 
7 
38 
02.8 
89 
04 
00 
Altair.. 
7 
39 
21.6 
108 
27 
10 
7 
40 
13.2 
108 
27 
20 
7 
41 
07.2 
108 
27 
30 
7 
41 
49.2 
108 
28 
00 
7 
42 
35.2 
108 
27 
20 
