ASTRONOMICAL OBSERVATIONS, 
5 
APPENDIX A—Continued. 
CAMP 17—AUGUST 
1, 
1855—Continued. 
Observer —Lieut. R. S. Williamson, U. S. Top. Engineers. 
Object observed. 
Time of 
observ’n 
Observed double 
by chronometer. 
altitudes. 
h. 
ra. 
s. 
d. 
ra. So 
Polaris...... 
8 
52 
02.0 
80 
25 20 
8 
53 
16.0 
80 
27 10 
8 
54 
45.0 
80 
28 00 
8 
56 
15.5 
80 
29 10 
8 
57 
36.0 
80 
29 40 
8 
58 
41.0 
80 
31 30 
Index error —1' 50". 
Barometer 26.1 in. Thermometer 
560. 
CAMP 18- 
-AUGUST 2, 1855. 
Observer —Lieut. R. S. Williamson, U. S 
Top. Engineers. 
h. 
ra. 
s. 
d. 
ra. s. 
a Cygni... 
8 
17 
52.5 
104 
05 40 
8 
19 
36.5 
104 
42 40 
8 
21 
06.5 
105 
14 10 
8 
22 
14.0 
105 
36 50 
8 
23 
27.0 
106 
01 50 
8 
24 
53.0 
106 
31 30 
Arcturus... 
8 
06 
06.0 
98 
11 00 
♦ 8 
07 
51.5 
97 
33 40 
8 
09 
41.0 
96 
54 40 
8 
11 
03.0 
96 
24 10 
8 
12 
44.5 
95 
48 10 
8 
15 
03.0 
94 
57 40 
Polaris.... 
8 
50 
56.5 
80 
45 20 
8 
52 
33.5 
80 
46 40 ? 
8 
53 
38.5 
80 
46 40? 
8 
55 
04.5 
80 
48 10 
8 
56 
31.5 
80 
49 40 
8 
57 
59.5 
80 
51 10 
a Serpentarii.. 
8 
31 
24.5 
123 
28 30 
8 
36 
03.5 
123 
33 10 
8 
37 
30.0 
123 
34 00 
8 
39 
06.5 
123 
34 30 
8 
40 
31.0 
123 
34 30 
8 
41 
45.5 
123 
35 00 
8 
42 
49.0 
123 
34 00 
8 
43 
55.0 
123 
33 10 
8 
45 
04.5 
123 
31 00 
8 
46 
22.0 
123 
29 50 
8 
47 
37.5 
123 
27 10 
Index error —1' 50". 
Barometer 26.8 in. Thermome- 
ter 640. 
CAMP 18—AUGUST 3, 1855. 
Observer —Lieut. H. L. Abbot, 
7. S. Top. Engineers. 
h. 
ra. 
s . 
d. 
ra. s . 
Sun’s lower limb....... 
9 
19 
56.0 
96 
00 00 
9 
20 
25.5 
96 
10 00 
9 
20 
53.5 
96 
20 00 
9 
2! 
23.0 
96 
30 00 
9 
21 
51.0 
96 
40 00 
CAMP 18—AUGUST 3, 1855—Continued. 
Observer —Lieut. H. L. Abbot, U. S. Top. Engineers. 
Object observed. 
Time of observ’n 
by chronometer. 
Observed double 
altitudes. 
h. 
m. 
So 
d. 
ra. 
So 
Sun’s lower limb. 
9 
22 
19.0 
96 
50 
00 
9 
22 
49.5 
97 
00 
00 
9 
23 
16.5 
97 
10 
00 
9 
23 
47.0 
97 
20 
00 
9 
24 
15.5 
97 
30 
00 
9 
24 
44.5 
97 
40 
00 
9 
25 
12.5 
97 
50 
00 
9 
25 
39.5 
98 
00 
00 
Sun’s lower limb... 
2 
37 
39.0 
98 
00 
00 
2 
38 
07.5 
97 
50 
00 
2 
38 
38.5 
97 
40 
00 
2 
39 
05.5 
97 
30 
00 
2 
39 
35.0 
97 
20 
00 
2 
40 
03.5 
97 
10 
00 
2 
40 
3(1.0 
97 
00 
00 
2 
41 
00.0 
96 
50 
00 
2 
41 
28.5 
96 
40 
00 
2 
41 
58.0 
96 
30 
00 
2 
42 
25.0 
96 
20 
00 
2 
42 
56.0 
96 
10 
00 
2 
43 
23.0 
96 
00 
00 
Sun’s lower limb....... 
11 
53 
55.0 
132 
40 
00 
11 
54 
54.0 
132 
40 
45 
11 
56 
31.0 
132 
43 
55 
11 
58 
05.0 
132 
44 
30 
11 
59 
00.0 
132 
44 
55 
12 
04 
37.0 
132 
44 
55 
12 
05 
57.0 
132 
44 
15 
12 
07 
34.5 
132 
42 
30 
12 
09 
22.5 
132 
40 
00 
a Cygni.. 
9 
17 
56.0 
126 
39 
00 
9 
20 
18.5 
127 
30 
00 
9 
22 
13.0 
128 
10 
20 
9 
24 
17.5 
128 
55 
40 
9 
26 
21 .5 
129 
39 
40 
9 
29 
02.5 
130 
35 
20 
Arcturus... 
8 
58 
09.0 
77 
37 
30 
9 
03 
27.0 
75 
35 
00 
9 
06 
45.5 
74 
22 
20 
9 
09 
31.5 
73 
29 
10 
9 
10 
54.5 
72 
47 
50 
9 
12 
29.0 
72 
12 
20 
a Serpentarii... 
8 
29 
45.0 
123 
40 
00 
8 
32 
58.5 
123 
40 
20 
8 
34 
54.0 
123 
42 
30 
8 
38 
16.0 
123 
41 
20 
8 
40 
43.0 
123 
38 
35 
8 
43 
39.5 
123 
37 
30 
Polaris. ............... 
9 
38 
29.0 
81 
28 
50 
9 
41 
38.5 
81 
31 
00 
9 
44 
00.5 
81 
33 
00 
9 
46 
23.0 
81 
34 
45 
9 
48 
45.5 
81 
37 
40 
9 
51 
52.5 
81 
39 
55 
Index error — 7' 10’'. Barometer,’ 26.8 in. Thermo¬ 
meter, 600. 
