ASTRONOMICAL OBSERVATIONS. 
ia 
APPENDIX A—Continued. 
III. Observations on the routes of detached parties, in charge of Lieut. H. L. Abbot, U. S. 
Topographical Engineers. 
CAMP 40 A—SEPTEMBER 7, 1855. 
Observer —Lieut. H. L. Abbot, U. S. Top. Engineers. 
CAMP 42 A—SEPTEMBER 9, 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 watch. 
altitudes. 
by watch. 
altitudes. 
ft. 
m. 
s. 
d. 
m. 
s. 
ft. 
m. 
s . 
d. 
111. 
S . 
a Cygni 
7 
29 
33.5 
138 
33 
to 
7 
19 
16.0 
138 
46 
10 
7 
3! 
55.0 
139 
22 
10 
7 
21 
47.5 
139 
38 
30 
7 
33 
20.0 
139 
50 
00 
7 
23 
26.5 
140 
13 
20 
7 
34 
20.0 
140 
11 
30 
7 
24 
37.5 
140 
38 
30 
7 
35 
21.0 
140 
33 
30 
7 
25 
56.5 
141 
06 
30 
7 
36 
13.5 
140 
50 
50 
7 
26 
53.5 
141 
25 
20 
Arcturus 
7 
39 
24.0 
51 
43 
30 
7 
31 
11.0 
55 
11 
20 
7 
41 
19.5 
51 
02 
50 
7 
32 
18.0 
54 
47 
20 
7 
42 
42.0 
50 
31 
30 
7 
33 
37.0 
54 
19 
50 
7 
43 
49.5 
50 
10 
00 
7 
34 
48.0 
53 
55 
40 
7 
44 
59.5 
49 
43 
50 
7 
35 
47.5 
53 
32 
50 
•7 
46 
33.0 
49 
12 
10 
7 
36 
50.0 
53 
12 
20 
7 
57 
47.5 
89 
37 
10 
41 
53.5 
90 
25 
10 
7 
59 
26.0 
89 
38 
50 
7 
43 
02.5 
90 
26 
40 
8 
01 
08.0 
89 
40 
40 
7 
44 
32.5 
90 
28 
40 
8 
02 
41.0 
89 
44 
20 
7 
47 
30.5 
90 
29 
50 
8 
03 
57.0 
89 
46 
10 
7 
48 
27.0 
90 
30 
40 
8 
05 
26.0 
89 
49 
20 
7 
50 
31.5 
90 
32 
10 
8 
06 
40.0 
89 
50 
00 
7 
52 
14.0 
90 
33 
50 
8 
08 
31.0 
89 
52 
10 
7 
54 
05.5 
90 
35 
10 
8 
09 
33.0 
89 
54 
00 
7 
55 
23.0 
‘90 
35 
50 
8 
10 
44.0 
89 
55 
50 
7 
56 
45.0 
90 
36 
50 
Index 
error, 
0. 
Barometer 
, 28.0 in. 
Thermometer, 
Index error, 4- 1' 50". 
Barometer,28.8in. Thermome- 
700.0. 
ter, 50°.5. 
CAMP 
41 A— 
SEPTEMBER 8, 
1855. 
CAMP 44 A—SEPTEMBER 15 
1855. 
Observer —Lieut. 
II L. Abbot, 
U. S. Top. Engineers. 
Observer — 
Lieut. H. L. Abbot, 
U. S. Top. Engineers 
h. 
m. 
s. 
d. 
m. 
s. 
ft. 
m. 
s. 
d. 
m. 
s. 
8 
35 
29.5 
49 
21 
40 
8 
33 
16.0 
53 
02 
40 
8 
37 
25.0 
49 
44 
20 
8 
34 
27.0 
53 
13 
40 
8 
39 
01.0 
50 
03 
10 
8 
35 
05.0 
53 
26 
40 
8 
40 
37.5 
50 
18 
50 
8 
37 
16.5 
53 
37 
20 
8 
41 
56.0 
50 
33 
40 
8 
38 
38.0 
53 
48 
00 
8 
42 
08.0 
50 
46 
30 
8 
39 
47.5 
53 
58 
10 
7 
59 
33 0 
46 
50 
10 
7 
35 
34.0 
00 
00 
8 
01 
30.5 
46 
06 
50 
7 
37 
35.5 
54 
18 
50 
8 
04 
24.0 
45 
07 
30 
7 
38 
58.0 
53 
49 
50 
8 
05 
53.5 
44 
35 
20 
7 
40 
05.0 
53 
27 
00 
8 
08 
19.0 
43 
44 
20 
7 
41 
27.0 
52 
56 
40 
7 
43 
04.5 
52 
23 
30 
Polaris . 
8 
14 
51.0 
90 
52 
10 
8 
16 
19.0 
90 
53 
50 
Polaris. 
8 
08 
05.5 
91 
45 
00 
8 
17 
37.5 
90 
55 
20 
8 
09 
32.5 
91 
46 
40 
8 
21 
37.5 
91 
01 
10 
8 
10 
49.5 
91 
47 
40 
8 
24 
11.5 
91 
06 
20 
8 
12 
25.5 
91 
49 
30 
8 
25 
26.0 
91 
09 
30 
8 
16 
10.0 
91 
50 
40 
8 
27 
02.5 
91 
10 
20 
8 
17 
24.0 
91 
53 
30 
8 
28 
37.0 
91 
12 
50 
8 
19 
33.5 
91 
55 
10 
8 
30 
50.0 
91 
15 
40 
8 
23 
35.0 
91 
58 
00 
8 
32 
57.0 
91 
18 
30 
8 
23 
41.0 
92 
00 
40 
8 
29 
56.5 
92 
01 
30 
Index 
error, 
0. 
Barometer, 27.1 in. 
Thermometer, 
550.0. 
Index error, 0. Barometer, 29.6 in. Thermometer, 520.0. 
