50 
BAROMETRICAL AND THERMOMETRICAL OBSERVATIONS. 
APPENDIX D—Continued. 
III. Routes of detached parties in charge of Lieut. R. L. Abbot, U. S. Topographical Engineer's. 
Date. 
Station. 
Hour. 
dumber of barometer. 
Reading of barometer. 
Attached thermometer. 
Detached thermometer, j 
Corrected reading of 
barometer. 
Mean of corrected read¬ 
ings of barometer. 
Elevation above mean 
tide at Benicia. 
Distance from preceding 
station. 
Distance from Benicia. 
Remarks. 
1855. 
Inches. 
Inches. 
Inches. 
Feet. 
Milos. 
Miles. 
Sept. 6 
12 m. 
1089 
26.790 
76.0 
70.0 
26.698 
3,294 
10.0 
tance estimated from 
camp 40. 
6 
1089 
28.172 
56.0 
54.0 
28.096 
7 
1089 
28.216 
43.0 
42.0 
28.108 
28.102 
1,907 
18.0 
636.7 
7 
1089 
27.888 
89.5 
84.0 
27.329 
2,660 
2.6 
639.3 
7 
1089 
28.005 
80.0 
78.0 
28.013 
Sept. 6-7, and 22-23. 
7 
1089 
28.038 
73.0 
70.0 
28.016 
8 
1089 
27.990 
41.0 
40.0 
28.035 
28.021 
1,964 
7.7 
647.0 
8 
1089 
27.481 
70.0 
62.0 
27.475 
2,527 
1.0 
648,0 
8 
1089 
28.470 
74.0 
67.0 
28.452 
1,531 
4.2 
Not used on profile. 
8 
12m. 
1089 
28.500 
87.0 
80.0 
28.488 
1,504 
11.5 
663.7 
8 
Highest point of mountain 
1089 
, 26.823 
82.0 
76.0 
25.872 
3,095 
4.0 
667.7 
8 
1089 
26.931 
87.0 
80.0 
26.969 
3,054 
3.3 
671.0 
8 
Camp 42 A, Nee-nee springs.. 
1089 
27.089 
70.0 
67.0 
27.139 
8 
1089 
27.088 
55.5 
55.0 
27.129 
9 
1089 
27.072 
50.0 
48.0 
27.130 
27.133 
2,829 
4.9 
675.9 
Mean height deduced 
9 
1089 
26.940 
68.0 
58.0 
26.907 
3,087 
2.7 
from observations on 
Sept. 8-9, 20-21, and 
Oct. 3-5. 
y 
8.30 a. m.. 
10b9 
27.800 
70.0 
65.0 
27.769 
2,207 
1.5 
General level of prairie. 
9 
Divide between two branches 
12 m. 
1089 
28.787 
85.0 
78.0 
28.743 
1,246 
15.5 
9 
1089 
28.777 
63.0 
48.0 
28.746 
10 
1089 
28.855 
33.0 
31.5 
28.886 
28.816 
1,153 
0.5 
10 
1089 
27.320 
61.0 
57.0 
27.287 
2,706 
2.5 
10 
1089 
28.225 
75.0 
65.0 
28.173 
1.805 
6.0 
10 
1089 
28.760 
80.0 
69.0 
28.707 
1,286 
7.0 
10 
1089 
29.190 
83.0 
73.0 
29.145 
862 
5.0 
10 
1089 
28.805 
84.0 
77.0 
28.766 
1,228 
2.0 
15 
1089 
29.573 
55.0 
52.0 
29.544 
476 
6.7 
17 
Above Cascades, Columbia 
2.35 p. m.. 
1089 
29.855 
67.5 
65.0 
29.701 
333 
42.0 
Observations to deter- 
mine the descent of the 
Columbia river at the 
Cascades. 
17 
Foot of principal rapid. 
3.10 p. m.. 
1089 
29.879 
63.0 
62.0 
29.736 
300 
0.3 
Do. 
17 
Lower landing, Cascades of 
Columbia river... 
1089 
29.917 
61.0 
62.0 
29.765 
272 
4.2 
Do. 
20 
South fork Tysch creek. 
7.48 a. m.. 
1089 
28.902 
59.0 
57.0 
28.868 
1,117 
75.5 
Eight-tenths of a mile 
20 
Highest point of trail on Mut 
south of camp 43 A. 
1089 
26.980 
61.0 
56.0 
23.975 
2,995 
16.0 
20 
1089 
27 142 
65.0 
59.0 
27.134 
2,833 
1.0 
20 
1089 
27 136 
44.0 
42 0 
27.144 
20 
1089 
27.136 
43.5 
43.5 
27.146 
21 
1089 
27.108 
40.0 
38.0 
27.147 
27.146 
2,829 
2.4 
675.9 
Mean height deduced 
from observations on 
Sept. 8-9, 20-21, and 
Oct. 3-5. 
21 
Highest point of mountain 
1089 
26.978 
58.0 
50.0 
26.941 
3,036 
8.2 
667.7 
Mean height deduced 
21 
Warn Chuck river. 
1089 
28.494 
74.0 
69.0 
28.473 
1,503 
4.0 
663.7 
from observations on 
21 
On bluff above cafion. 
1089 
28.146 
65.0 
61.0 
23.159 
1,810 
1.0 
662.7 
Sept. 8 and 21. 
21 
1089 
56 0 
55 0 
28.479 
oil 
9 p. m. 
1089 
28.476 
50.0 
49.0 
28.490 
