12 
HEIGHTS AND DISTANCES 
APPENDIX A—Continued. 
Observations taken by Mr. James Doty , on a survey from Fort Benton , via Sun river and eastern 
base of the Rocky mountains , to Birch river , in May , 1854. A7o. o/* instrument , 776. 
Number of station. 
Locality. 
Date. 
Hour. 
Distance between stations. 
Corrected barometer read¬ 
ing. 
Attached thermometer. 
Temperature of the air. 
Mean corrected barometer 
and thermometer. 
Altitude. 
Remarks. 
Miles. 
Inches. 
0 
Q 
Feet . 
1 
11.50 
27.174 
39 
32 
27.097 
1 ] 
27.020 
61 
62 
40° 
2,863.0 
2 
Great Falls . .... 
12 
25.00 
26 816 
42 
42 
26.781 
12 
9 a. m. 
26.745 
60 
58 
51” 
2,979.0 
3 
12 
26.320 
59 
58 
26.320 
3,481.7 
4 
12 
16.00 
26.435 
53 
48 
13 
26.397 
40 
40 
26.438 
13 
26.481 
60 
63 
37°. 3 
3,474.0 
5 
13 
2 p.m. . 
26.402 
65 
62 
26.402 
3,484.0 
6 
13 
22.00 
26.276 
52 
52 
14 
Sunrise. 
26.442 
46 
45 
14 
2 p. in. .o.... 
26.426 
65 
62 
15 
26.593 
34 
33 
26.374 
15 
26.521 
61 
58 
44° 
3,592.0 
7 
15 
Sunset. 
20.00 
26.215 
48 
46 
16 
26.323 
39 
38 
26.112 
16 
9 a. m. 
26.304 
72.5 
68 
40” 
3,789.0 
8 
16 
25.966 
74 
70 
25.966 
4,365.2 
9 
16 
23.00 
25.996 
55 
56 
17 
Sunrise. 
26.027 
46 
46 
26.237 
17 
9 a. m... 
26.001 
67 
64 
52° 
3,765 7 
10 
17 
25.594 
80 
79 
91° 
4,482.9 
11 
17 
Sunset. 
18.50 
25.621 
58 
59 
of camp, 47” 32' 39". 
18 
25.252 
40 
40 
18 
25.632 
67 
65 
18 
25.628 
53 
52 
25.478 
19 
Sunrise , 
25.604 
45 
44 
55° 
19 
9 a. m....... 
25.733 
60 
60 
4,594.0 
12 
19 
2 p. in. . o.,.. 
25.138 
65 
62 
72° 
5,166.4 
13 
19 
Sunset . 
20.50 
25.349 
58 
58 
20 
Sunrise.. 
25.392 
39 
38 
25.085 
20 
25.308 
64 
60 
47° 
4 984 0 
14 
20 
2 p. m. 
25.285 
81 
76 
84£” 
4,896.7 
15 
20 
20.50 
25.124 
59 
61 
2 L 
25.141 
61 
60 
25 162 
21 
9 a. m.. 
. 
25.137 
77 
76 
68 ” 
5,008.0 
16 
21 
6.00 
25.267 
76 
74 
21 
9 p. m.. 
25.777 
53 
53 
25.523 
22 
Sunrise...... 
25.316 
54 
52 
67” 
4,602.6 
