PARTIAL RESULTS OF EXPLORATION, 
403 
Meteorological Observations at stations on the route —Continued. 
II.—From register kept under the direction of Lieutenant John Mullan, U. S. A. Determination of the height of Cantonment 
Stevens. 
Barometer. 
Mean tempe¬ 
rature of the 
air. 
Height. 
Remarks. 
Mean height of 
column, 431 
observations. 
Mean of reduc¬ 
tions to the 
freezing point. 
26.134 
26.102 
o 
38. 01 
Feet. 
3,754 
The calculation has been made by referring the station to the level 
of the sea in the same latitude, where it is assumed that the cor¬ 
rected height of the barometrical column is 30 inches, and the 
temperature of the air 55°. No corrections have been applied 
except those for the temperatures of the air for the latitude, and 
for the elevation of the upper barometer. In making the re¬ 
ductions to the freezing point the tables for barometers with 
brass scales have been used. The barometer employed in the 
observations was Green’s open cistern, which, it is thought, has 
its scale on glass. The observations were generally taken daily 
at 7 a. m., 2 p. m., and 9 p. m. The following are, however, 
wanting, viz: In January, at 7 a. in. on the 1st, 2d, 7th, and 11th; 
at 2 p. m. on the 1st, 10th, llth, and 30th: and at 9 p. m. on the 
1st, 6th, 10th, and 29th. In February, at 2 p. m. on the 8th, and 
at 9 p. m. on the 8th and 9th. In April, at 2 p. m. on the 15th 
and 28th. And in May, at 2 p. m. on the 1st and 20th. The 
observations, as recorded in the register, at 9 p. m. on the 28th 
of April and the 14th of May, and at 2 p. m. on the 15th of May, 
are, respectively, 26.690, 26.900, and 26.880. From the general 
range of the barometer.at the time, it is thought 25.690, 25.900, 
and 25.880, were intended. 
III.—Copied, by permission, from a register kept at Fort Steilacoom, W. T., by Dr. J. M. Haden and Dr. George Suckley, 
U. S. A., for the medical department. 
Mean temperatures. 
Extreme temperatures. 
Remarks 
Date. 
Sunrise. 
9 a. m. 
3p. m. 
9p. m. 
Monthly 
mean. 
Upper. 
Day and hour. 
Lower. 
Day and hour. 
1853. 
o 
o 
o 
o 
o 
o 
o 
October... 
45.25 
55. 58 
62. 32 
51.19 
53. 32 
78 
4th, 3 p. m. 
29 
23d, sunrise. 
There were 6. 93 inches of rain. 
There was hoar frost three 
times, and frost once, during the 
month. 
November. 
40.2 
46.7 
50. 43 
43.73 
44.63 
59 
30th, 3 p. m. 
27 
14th, sunrise. 
There were 18. 41 inches of rain. 
Hoar frost twice; one strong 
frost. 
December. 
1854. 
38.74 
44. 30 
51 
44. 45 
44.74 
60 
2d, 3d, & 5th, 
3 p. m. 
23 
20 th, sunrise. 
There were 4. 42 inches of rain. 
1 £ inch of snow at sunrise on 
the 23d. There were hoar frost 
three times, frost once, and hard 
frost four times, during the 
month. 
January... 
24. 64 
29. 96 
37. 80 
30. 03 
31.38 
58 
2d and 29tli, 
3 p. m. 
—1 
22 d, sunrise. 
There were 8. 69 inches of rain; 
2 £ inches of snow at sunrise, 
and ice 1^ inch thick on the 
4th. Snow latter part of the 
l()th; 2f inches of snow at sun¬ 
rise, and snow at intervals, on 
the llth. Light showers of 
snow at intervals on the 12th. 
Six days when there was frost. 
