PARTIAL RESULTS OF EXPLORATION, 
461 
Meteorological Observations at stations on the route. 
I.—From register kept by Mr. James Doty, at Fort Benton, Upper Missouri river, latitude 47° 49' 34" N. Approximate 
longitude 110° 35' W.; approximate elevation 2, 329 feet. 
Mean temperatures. 
Extreme temperatures. 
Date. 
7 a. m, 
2 p. m. 
9 p. m. 
Monthly 
mean. 
Upper. 
Day and hour. 
Lower. 
Day and hour. 
Remarks. 
1853. 
o 
o 
O 
o 
O 
o 
October. 
47 
61 
51 
53 
80 
17th, 2 p. m. 
10 
23d, 7 a. m. 
But a slight quantity of rain 
fell. Of snow there were 3£ 
inches—2£ inches on the 
24th, and § inch on the 31st. 
The general direction of the 
wind was west-soutliwest. 
November... 
12.7 
27.5 
18 
19.4 
58 
20 th, 2 p. m. 
—2 
5th and 25th, 
7 a. m. 
Of snow 2f inches fell. The 
general direction of the wind 
was north. 
December... 
27.77 
40. 94 
30.4 
33.03 
60 
8 th, 2 p. m. 
0 
22d, 7 a. m. 
Clear weather prevailed. The 
general direction of the wind 
was southwest. 
II.—From register kept under the direction of Lieutenant Jolm Mullan, United States army, at Cantonment Stevens, Bitter 
Root valley, Washington Territory. Approximate latitude 46° 19' 15" N.; approximate longitude 113° 55' W. 
Barometer. 
Extremes of the barometer before and after re¬ 
ductions to freezing point. 
Mean temperatures 
• 
Date. 
Mean height of 
column. 
Mean of reduc¬ 
tions to freez- 
i l g|Join 
Upper. 
Day and hour. 
Lower. 
Day and hour. 
7 a. m. 
2 p. m. 
9 p. m. 
Monthly mean. 
o 
o 
o 
o 
Jan., 1854.... 
26. 354 
26. 360 
26. 870 
reduced 
26. 956 
5th, 7 a. m. 
26. 020 
25.985 
25.965 
reduced 
26. 005 
26. 035 
26.015 
3d, 7 a. m. 
24th, 2 p. m. 
24th, 9 p. m. 
12.10 
16.87 
12.82 
13.93 
Feb., 1854.... 
26.215 
26.207 
26. 570 
reduced 
26. 590 
1st, 9 p. m. 
25. 630 
reduced 
25.617 
11th, 7 a. m. 
28 
37.15 
28. 87 
31. 34 
March, 1854... 
26.144 
26.117 
26. 480 
reduced 
26.476 
31st, 7 a. m. 
25. 785 
reduced 
25. 751 
10th, 7 a. m. 
37.8 
46.5 
34.2 
39.5 
April, 1854.... 
25. 982 
25. 933 
26. 500 
reduced 
26. 495 
1st, 7 a. m. 
25.195 
reduced 
25. 089 
18th, 2 p. m. 
46 
58.5 
46.9 
50.5 
May, 1854 .... 
25.976 
25.891 
26. 340 
reduced 
26. 319 
9th, 7 a. m. 
25. 295 
reduced 
25. 212 
21st, 7 am. 
53.2 
62.7 
49.8 
54.8 
