10 
ASTRONOMICAL OBSERVATIONS. 
APPENDIX A—Continued. 
Observer— 
CAMP 34—AUGUST 23, 1855. 
-Lieut. R. S. Williamson, U. S. Top. Enginee 
rs. 
CAMP 37—AUGUST 27, 1855. 
Observer —Lieut. H. L. Abbot, U. S. Top Engineers. 
Object observed. 
Time of observ’n 
Observed double 
Object observed. 
Time of observ’n 
Observed double 
by chronometer. 
altitudes. 
by chronometer. 
altitudes. 
h. 
in. 
s. 
d. 
in. 
s. 
h. 
m. 
s. 
d. 
in. 
s. 
8 
15 
44.0 
126 
53 
00 
Sun’s lower limb.. • • • • • 
9 
u 
50.5 
73 
00 
00 
8 
17 
17.5 
127 
24 
50 
9 
12 
22.5 
73 
10 
00 
8 
18 
14.5 
127 
45 
00 
9 
12 
53.5 
73 
20 
00 
8 
19 
22.5 
128 
09 
10 
9 
13 
24.5 
73 
30 
00 
8 
20 
19.5 
128 
29 
50 
9 
13 
51.5 
73 
40 
00 
8 
21 
22.0 
128 
51 
00 
9 
14 
23.5 
73 
50 
00 
9 
14 
54.5 
74 
00 
00 
Arcturus. 
8 
25 
50.5 
67 
17 
40 
9 
15 
22.0 
74 
10 
00 
8 
27 
08.0 
66 
48 
30 
9 
15 
55.5 
74 
20 
00 
8 
28 
12.5 
66 
15 
30 
9 
16 
25.0 
74 
30 
00 
8 
29 
33.5 
65 
55 
40 
9 
16 
53.5 
74 
40 
00 
8 
30 
35.5 
65 
32 
50 
9 
17 
26.5 
74 
50 
00 
8 
31 
26.0 
65 
13 
30 
9 
17 
58.5 
75 
00 
00 
8 
36 
14.0 
85 
30 
40 
Sun’s lower limb... 
3 
29 
33.0 
75 
00 
00 
8 
37 
12.5 
85 
31 
50 
3 
30 
05.0 
74 
50 
00 
8 
38 
16.5 
85 
32 
30 
3 
30 
35.5 
74 
40 
00 
8 
39 
03.0 
85 
33 
30 
3 
31 
05.5 
74 
30 
00 
8 
39 
39.5 
85 
34 
00 
3 
31 
36.5 
74 
20 
00 
8 
40 
28.5 
85 
34 
30 
3 
32 
09.5 
74 
10 
00 
8 
41 
11.5 
85 
35 
00 
3 
32 
38.5 
74 
00 
00 
8 
42 
21.0 
85 
35 
30 
3 
33 
09.0 
73 
50 
00 
8 
43 
10.5 
85 
36 
00 
3 
33 
41.5 
73 
40 
00 
8 
44 
54.5 
85 
37 
00 
3 
34 
10.5 
73 
30 
00 
3 
34 
40.0 
73 
20 
00 
3 
35 
12.0 
73 
10 
00 
Index error — 6' 00”. 
Barometer, 25.6 in. Thermome- 
3 
35 
42.0 
73 
00 
00 
ier, 
Sun’s upper limb. 
12 
17 
15.0 
113 
26 
10 
12 
19 
05.5 
113 
27 
30 
12 
19 
52.0 
113 
28 
00 
12 
20 
38.0 
113 
28 
20 
12 
21 
40.0 
113 
28 
40 
12 
22 
44.0 
113 
28 
50 
12 
23 
17.0 
113 
29 
10 
CAMP 3G- 
-AUGUST 25, 1855. 
12 
24 
05.0 
113 
29 
40 
12 
25 
00.5 
113 
29 
50 
Observer— 
-Lieut. R. S. Williamson, U.S. Top. Engine 
ers. 
12 
25 
53.0 
113 
29 
30 
12 
26 
51.0 
113 
28 
40 
12 
27 
43.0 
113 
28 
10 
h. 
m. 
s. 
d. 
m. 
s. 
12 
28 
10.0 
113 
27 
50 
a Cygni. 
8 
19 
22.0 
128 
42 
40 
12 
28 
39.5 
113 
27 
10 
8 
20 
53.5 
129 
25 
20 
12 
29 
07.0 
113 
26 
40 
8 
22 
04.5 
129 
40 
50 
12 
29 
46.0 
113 
25 
50 
8 
23 
13.5 
130 
05 
30 
8 
25 
07.0 
130 
45 
20 
8 
26 
40.0 
131 
17 
00 
Index error — 6' 15". 
Barometer, 25.9 in. Thermo- 
meter, 55°. 
Arcturus. 
8 
06 
43.5 
73 
49 
10 
8 
08 
11.5 
73 
16 
50 
8 
09 
14.5 
72 
54 
10 
8 
10 
37.5 
72 
20 
20 
8 
11 
59.0 
71 
54 
20 
8 
12 
55.0 
71 
34 
30 
CAMP 37- 
-AUGUST 28, 1855. 
8 
35 
10.5 
86 
31 
50 
Observer —Lieut. H. L. Abb 
OT, 
XJ. S. Top. Engineers. 
8 
36 
06.5 
86 
32 
30 
8 
37 
18.5 
86 
33 
20 
8 
40 
16.0 
86 
35 
20 
h. 
m. 
s. 
d. 
111. 
S. 
8 
41 
16.5 
86 
36 
00 
Sun’s lower limb. 
12 
21 
46.5 
Ill 
43 
40 
8 
42 
06.0 
86 
37 
00 
12 
22 
45.5 
111 
45 
20 
8 
43 
04.0 
86 
38 
00 
12 
23 
24.5 
111 
44 
00 
8 
44 
03.0 
86 
38 
50 
12 
24 
06.0 
111 
43 
20 
8 
46 
17.5 
86 
40 
20 
12 
25 
03.0 
111 
43 
30 
8 
47 
25.5 
86 
41 
10 
12 
26 
08.8 
111 
42 
50 
Index error — 6' 00”. 
Barometer, 25.6 in. Thermome- 
Index error — 6' 40". 
Barometer, 25.9 in. Thermo- 
ter, 55°. 
meter, 75°. 
