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APPENDIX A. 
ASTRONOMICAL OBSERVATIONS WITH SEXTANT. 
SEXTANT NO. 1 AND ARTIFICIAL HORIZON OF MERCURY. 
FORT SMITH, 
(Rogei- 
s’ Hotel)— July 5, 1853. 
CAMP WILSON—July 6, 1853— 
Continued. 
Object observed. 
Time of observ’n 
Observed double 
Object observed. 
Time of observ’n 
Observed double 
by chronometer. 
altitude. 
by chronometer. 
altitude. 
li. 
7)1. 
s. 
o 
- 
h. 
m. 
s. 
o 
/< 
5 
08 
11. 6 
107 
47 
50 
Polaris_ 
5 
59 
34. 4 
68 
51 
30 
5 
11 
53. 8 
109 
14 
00 
6 
01 
33. 9 
68 
53 
00 
5 
14 
28. 1 
110 
14 
40 
6 
02 
28. 2 
68 
54 
10 
5 
16 
08. 0 
110 
50 
50 
5 
5 
16 
18 
58. 9 
40. 0 
111 
111 
11 
49 
00 
20 
Thermometer 78°. Barometer 29. 7 in. Index error — 
50". 
5 
20 
09. 9 
112 
24 
50 
SEXTANT 
No. 2. 
Arcturus.. 
5 
23 
06. 0 
127 
50 
50 
CAMP WILSON 
—July 12. 1853. 
5 
25 
25. 8 
126 
58 
40 
5 
26 
46. 2 
126 
32 
00 
5 
59 
58. 8 
114 
08 
50 
Polaris.- 
6 
24 
04. 2 
69 
13 
20 
6 
01 
28. 6 
113 
33 
20 
6 
25 
06. 6 
69 
14 
50 
6 
26 
13. 9 
69 
15 
00 
Polaris... 
5 
31 
55. 9 
68 
41 
20 
6 
27 
02. 0 
69 
15 
30 
5 
34 
50. 1 
68 
42 
10 
6 
28 
07. 9 
69 
16 
00 
5 
36 
13. 9 
68 
44 
00 
6 
29 
02. 2 
69 
16 
20 
5 
38 
20. 2 
68 
44 
20 
6 
30 
01. 4 
69 
16 
50 
5 
47 
09. 9 
68 
48 
40 
6 
31 
30. 1 
69 
18 
20 
5 
52 
38. 2 
68 
51 
00 
6 
32 
48. 9 
69 
19 
00 
5 
53 
47. 5 
68 
51 
50 
6 
34 
15. 1 
69 
20 
10 
6 
35 
25. 6 
69 
20 
50 
6 
36 
29. 9 
69 
21 
30 
Thermometer 80°. Barometer 29. 7 in. Index error — 
50". 
a Cygni. 
6 
40 
32. 5 
97 
31 
30 
6 
41 
39. 9 
97 
55 
00 
CAMP WILSON—July G, 1853. 
6 
43 
01. 9 
98 
24 
10 
0 
11 
10 0 
98 
48 
30 
6 
45 
19. 2 
99 
13 
10 
o Lyra;. 
5 
25 
32. 6 
114 
29 
00 
6 
46 
27. 3 
99 
36 
40 
5 
27 
56. 5 
115 
24 
10 
6 
47 
51. 2 
100 
06 
10 
5 
29 
23. 3 
115 
59 
10 
5 
30 
38. 2 
116 
27 
10 
Arcturus. ... 
6 
51 
13. 8 
94 
06 
20 
5 
31 
56. 7 
116 
57 
30 ? 
6 
52 
58. 2 
93 
24 
25 
6 
53 
52. 6 
93 
02 
00 
Arcturus.. 
5 
45 
28. 2 
119 
39 
45 
6 
55 
03. 6 
92 
32 
10 
5 
47 
47. 9 
118 
47 
45 
6 
55 
42. 9 
92 
17 
10 
5 
49 
18. 2 
118 
13 
50 
6 
57 
24. 0 
91 
36 
25 
5 
50 
18. 1 
117 
51 
45 
6 
58 
54. 9 
91 
00 
00 
5 
53 
14. 6 
116 
44 
10 
Polaris .. 
5 
56 
22. 2 
68 
50 
10 
Index error — 8' 55". 
Thermometer attached 78°. Ther- 
5 
57 
48. 6 
68 
50 
20 
mometer detached 26°. 
Barometer 29.7 
in. 
Note.—I t has been deemed proper to give the original unreduced records of the astronomical, magnetic, and meteorological 
observations, in order that those who have a special interest in these subjects may recompute any portion of the data upon 
which the results are founded. This is regarded as the more important, in consequence of the hasty manner in which the 
tables were prepared to be submitted to the department. The latitudes and longitudes were required at so early a period 
for the construction of the maps, that little time rvas allowed for the verification of the primary computations. 
