Reports of explorations and surveys, to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean: Vol. 1, Pt. 2

PARTIAL RESULTS. OF EXPLORATION. 46
AIeteorological 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.
Date.
2p. m.
61
Monthly
mean.
53
1853.
October.....
Extreme temperatures.
Jpper. Day and hour. Lower. Day and hour.
0
80
17th, 2 p.m.
0
10
23d, 7 a. m.
5th and 25th,
7a. m.
22d, 7 a. m.
20th, 2 p. m.
8th, 2 p. m.
Remarks.
But a slight quantity of rain
fell. Of snow there were 3.
inches-2n inches on the
24th, and a inch on the 31st.
The general direction of the
wind was west-southwest.
Of snow 2} inches fell. The
general direction of the wind
was north.
Clear weather prevailed. The
general direction of the wind
was southwest.
II.-From register kept under the direction of Lieutenant John 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- Mean temperatures.
ductions to freezing point.
Date.
Dae, 0 Upper. Dayandhour. Lower. Dayandhour. 7a.m. 2p.m. 9p.m. i
0 0 0 0
Jan., 1854.... 26. 354 26. 360 26. 870 5th, 7 a. m. 26.020 3d, 7 a. m. 12.10 16.87 12.82 13.93
reduced 25.985 24th,2 p.m.
26.956 25.965 24th, 9 p.m.
reduced
26.005
26.035
26.015
Feb., 1854.... 26.215 26.207 26.570 1st, 9 p.m. 25.630 11lth, 7 a.m. 28 37.15 28.87 31.34
reduced reduced
26.590 25.617
March, 1854... 26.144 26.117 26.480 31st, 7 a. m. 25.785 10th, 7 a. m. 37.8 46.5 34.2 39.5
reduced reduced
26.476 25.751
April, 1854.... 25.982 25.933 26.500 1st, 7 a.m. 25.195 18th, 2 p.m. 46 58.5 46.9 50.5
reduced reduced
26. 495 25. 089
May, 1854.... 25.976 25.891 26.340 9th, 7 a. m. 25.295 21st, 7 a m. 53.2 62.7 49.8 54.8
reduced reduced
26.319 25.212
9 P. M.
510
7 a. m,
470
November..
Decetuber..
12.7
27.77
27. 5
40. 94
18
30. 4
19.4
33.03
58
60
-2
0