20 
ASTRONOMICAL OBSERVATIONS. 
APPENDIX A—Continued. 
CAMP 46 A, (same as 42 A)—SEPTEMBER 20, 1855. 
Observer —Lieut. PI. L. Abbot, U. S. Top Engineers. 
Object observed. 
Time of observ’n 
by watch. 
Observed double 
altitudes. 
h. 
m. 
s. 
cl 
m. 
s. 
Jupiter.. 
7 
33 
18.5 
49 
44 
50 
7 
34 
54.0 
50 
02 
30 
7 
36 
34.0 
50 
21 
10 
7 
37 
43.0 
50 
32 
30 
7 
38 
59.0 
50 
45 
30 
7 
40 
08.0 
50 
57 
00 
Arcturus. 
7 
01 
56.5 
45 
06 
30 
7 
03 
18.5 
44 
16 
30 
7 
04 
24.0 
43 
53 
10 
7 
05 
21.0 
43 
32 
50 
7 
06 
26.0 
43 
10 
40 
7 
07 
21.5 
42 
51 
00 
Polaris. 
7 
13 
42.0 
90 
18 
50 
7 
15 
23.5 
90 
20 
10 
7 
16 
51.0 
90 
21 
00 
7 
18 
25.0 
90 
22 
00 
7 
19 s 
33.5 
90 
24 
00 
7 
20 
55.0 
90 
24 
40 
7 
21 
41.0 
90 
25 
50 
7 
24 
31.5 
90 
28 
10 
7 
25 
58.0 
90 
28 
50 
7 
27 
10.0 
90 
29 
40 
Index error, —J— 2' 30”. Barometer, 27.1 in. Thermome¬ 
ter, 43°.5. 
CAMP 47 A—SEPTEMBER 21, 1855. 
Observer —Lieut. IT. L. Abbot, U. S. Top. Engineers. 
h. 
111. 
s. 
d. 
m. 
s. 
Jupiter. 
7 
37 
22.5 
51 
42 
40 
7 
38 
50.5 
51 
57 
50 
7 
40 
03.5 
52 
10 
10 
7 
41 
03.0 
52 
20 
20 
7 
42 
05.5 
52 
30 
30 
7 
43 
18.0 
52 
41 
50 
Polaris .. 
7 
11 
45.5 
89 
51 
30 
7 
13 
21.5 
89 
53 
20 
7 
14 
23.5 
89 
55 
20 
7 
16 
54.0 
89 
56 
30 
7 
19 
38.0 
89 
58 
20 
7 
21 
13.5 
89 
59 
30 
7 
22 
56.0 
90 
01 
30 
7 
24 
22.5 
90 
02 
30 
7 
25 
51.0 
90 
03 
00 
7 
27 
21.5 
90 
04 
40 
Index error, -|- 1' 00". Barometer, 28.5 in. Thermo¬ 
meter, 49°. 0. 
CAMP 48 A, (same as 40 A)—SEPTEMBER 22, 1855. 
Observer —Lieut. IT. L. Abbot, U. S. Top. Engineers. 
| h. 
m. 
s. 
d. 
m. 
s. 
Jupiter. 7 
48 
54.0 
54 
28 
10 
7 
50 
20.0 
54 
45 
10 
7 
52 
21.0 
54 
49 
20 
1 7 
53 
45.0 
55 
11 
46 
CAMP 48 A, (same as 40 A)—SEPT. 22,1855—Continued. 
Observer —Lieut. H. L. Abbot, 17. S. Top. Engineers. 
Object observed. 
Time of observ’n 
by watch. 
Observed double 
altitudes. 
ft. 
m. 
s. 
cl. 
m. 
s. 
Polaris... 
7 
25 
23.0 
89 
43 
50 
7 
27 
12.5 
89 
46 
20 
7 
28 
10.5 
89 
48 
20 
7 
31 
17.0 
89 
50 
30 
7 
33 
34.0 
89 
51 
30 
7 
35 
11.0 
89 
53 
50 
7 
36 
31.0 
89 
54 
2!) 
7 
37 
28.0 
89 
55 
10 
7 
38 
37.0 
89 
56 
10 
7 
40 
09.0 
89 
57 
00 
Index error,-j-P 20”. Barometer, 28.0 in. Thermo¬ 
meter, 40°. 
CAMP 51 A—SEPTEMBER 26, 1855. 
Observer —Lieut. H. L. Abbot, U. S. Top. Engineers. 
Object observed. 
Time of observ’n 
by chronometer. 
Observed doutdb 
altitudes. 
h. 
m. 
s. 
d. 
m. 
s. 
r; Pegasi.. 
8 
20 
37.5 
112 
18 
20 
8 
23 
UO.O 
113 
07 
40 
8 
24 
32.0 
113 
40 
30 
8 
26 
12.0 
114 
15 
20 
8 
28 
11.0 
114 
56 
40 
8 
29 
50.5 
115 
30 
40 
y Bootis. 
8 
05 
56.0 
64 
33 
50 
8 
07 
26.0 
64 
01 
10 
8 
08 
13.0 
63 
45 
20 
8 
09 
17.5 
63 
23 
30 
Polaris. 
8 
37 
21.0 
90 
00 
20 
8 
38 
43.0 
90 
01 
30 
8 
39 
56.0 
90 
02 
10 
8 
41 
30.5 
90 
04 
30 
8 
43 
05.0 
90 
06 
20 
8 
44 
40.5 
90 
06 
40 
8 
45 
54.0 
9il 
06 
50 
8 
47 
08.0 
90 
07 
40 
8 
48 
43.0 
90 
09 
10 
8 
50 
39.0 
90 
10 
50 
8 
51 
45.0 
90 
11 
10 
8 
53 
02.0 
90 
11 
50 
8 
54 
18.0 
90 
12 
40 
Index error, -f- 1' 20", Barometer, 25.5 in. Thermo¬ 
meter, 51°.5. 
CAMP 52 A—SEPTEMBER 27, 1855. 
Observer —Lieut. H. L. Abbot, U. S. Top. Engineers. 
h. 
m. 
s. 
cl. 
m. 
s. 
r] Pegasi... 
8 
33 
16.5 
118 
oo 
40 
8 
35 
04.5 
118 
38 
10 
8 
3G 
13.0 
119 
00 
40 
8 
37 
39.5 
119 
29 
20 
8 
39 
14.5 
120 
02 
30 
8 
41 
0.00 
120 
38 
20 
