12 
ASTRONOMICAL OBSERVATIONS. 
APPENDIX A—Continued. 
CAMP 38 A—SEPTEMBER I, 1855—Continued. 
Observer —Lieut. H. L. Abbot, U. S. Top. Engineers. 
Object observed. 
Time of observ’n 
by chronometer. 
Observed double 
altitudes. 
h. 
m. 
s. 
d. 
m. 
s. 
Sun’s lower limb. 
9 
16 
28.5 
as 
40 
00 
9 
16 
58.5 
65 
50 
00 
9 
17 
27.5 
66 
00 
00 
Sun’s lower limb. 
4 
06 
48.5 
66 
00 
00 
4 
07 
15.0 
65 
50 
00 
4 
08 
16.5 
65 
30 
00 
4 
08 
45.0 
65 
20 
00 
4 
09 
15.0 
65 
10 
00 
4 
09 
42.5 
65 
00 
00 
4 
10 
14.5 
64 
50 
00 
4 
10 
44.5 
64 
40 
00 
4 
11 
14.5 
64 
30 
0J 
4 
11 
44.5 
64 
20 
00 
4 
12 
14.5 
64 
10 
00 
4 
12 
44.5 
64 
00 
00 ! 
Sun’s lower limb. 
12 
33 
22.5 
108 
36 
30 
12 
34 
16.0 
108 
38 
00 
12 
35 
04.0 
108 
38 
30 
12 
36 
46.5 
108 
39 
50 
12 
37 
22.0 
108 
41 
30 
12 
39 
57.5 
108 
42 
00 
12 
41 
47.0 
108 
42 
20 
12 
42 
29.0 
108 
42 
30 
12 
43 
04.5 
108 
42 
00 
12 
43 
36.5 
108 
42 
00 
12 
46 
46.0 
108 
41 
00 
12 
48 
35.5 
108 
39 
30 
12 
49 
38.0 
108 
38 
40 
12 
50 
14.5 
108 
37 
30 
12 
51 
16.5 
108 
36 
20 
Index error 0. Barometer 25.9 in. Thermometer 780. 
CAMP 39 A—SEPTEMBER 2, 1855. 
Observer —Lieut. H. L. Abbot, U. S. Top. Engineers. 
a Cygni. 
h. 
m. 
s. 
d. 
m. 
s. 
8 
07 
57.5 
129 
ii 
30 
8 
09 
49.5 
129 
48 
40 
8 
10 
46.5 
130 
07 
30 
8 
11 
42.0 
130 
28 
40 
8 
12 
55.5 
130 
53 
30 
8 
13 
39.0 
131 
10 
00 
CAMP 39 A—STPTEMBER 2, 1855—Continued. 
Observer —Lieut. H. L. Abbot, U. S. Top. Engineers. 
Object observed. 
Time 
of observ’n 
Observed double 
by chronometer. 
altitudes. 
h. 
m 
5. 
d. 
s. 
Arcturus. 
8 
16 
47.5 
65 
34 
10 
8 
17 
56.5 
65 
09 
00 
8 
18 
46.0 
64 
50 
30 
8 
19 
33.0 
64 
33 
30 
8 
20 
34.5 
64 
12 
10 
8 
21 
15.5 
63 
57 
10 
Polaris. 
8 
26 
28.0 
87 
17 
20 
8 
28 
26.0 
87 
19 
50 
8 
29 
25.0 
87 
21 
10 
8 
30 
22.0 
87 
21 
40 
8 
31 
33.5 
87 
22 
50 
8 
32 
28.5 
87 
23 
10 
8 
33 
59.5 
87 
24 
40 
8 
38 
41.0 
87 
26 
50 
8 
39 
42.5 
87 
27 
20 
8 
40 
42.0 
87 
28 
20 
8 
43 
06.5 
87 
30 
00 
Index error 0. Barometer 25.9 in. 
Thermometer 
440. 
CAMP 40—SEPTEMBER 5, 1855. 
Observer —Lieut. H. L. Abbot, U S. Top. Engineers. 
Object observed. 
Time 
of 0 
bserv’n 
Observed double 
by watch. 
altitudes. 
h. 
m. 
s. 
d. 
m. 
S. 
Sun’s lower limb. 
11 
54 
44.4 
104 
36 
40 
11 
55 
08.4 
104 
36 
50 
11 
55 
34.0 
104 
37 
00 
11 
56 
12.4 
104 
37 
10 
11 
56 
46.0 
104 
37 
30 
11 
57 
14.8 
104 
37 
30 
11 
57 
41.2 
104 
37 
50 
11 
58 
16.8 
104 
37 
30 
11 
59 
20.8 
104 
37 
10 
12 
00 
09.2 
104 
37 
10 
12 
00 
52.4 
104 
37 
20 
12 
01 
45.6 
104 
37 
30 
12 
02 
29.2 
104 
37 
00 
Index error 0. Barometer, 25.8 in. Thermometer, 59°. 
