42 
NORTHWESTERN BOUNDARY OF UNITED STATES. [bull. 174. 
Declination, dip, and force for the mean epoch 1860. 
[Abstract of results obtained by Capt. R. W. Haig, R. A., with standard instruments, between 
August, 1858, and August, 1861, in connection with the survey of the northwest boundary. From 
Philosophical Transactions of the Royal Society, 1864, vol. 154, pp. 161-166.] 
Station. 
Akamina station 
Wigwam station 
Tobacco Plains (Kootenay) . 
On Kootenai River 
South Crossing (Kootenay) . . 
Chelemta 
Pack River 
Sinyakwateen 
Chemikane River 
Colville B. B. C. Barracks 
Inshwointum 
Osoyoos station 
Ashtnolou station 
On Ashtnolou River 
Do 
Dalles, 8-mile camp 
Dalles, 3-mile camp 
Chiluweyuk 
Schweltza Lake 
Sumass Prairie 
Nisqually 
Fort Vancouver 
Esquimalt 
Latitude. 
49 01 
49 00 
48 57 
48 40 
48 22 
48 41 
48 22 
48 09 
48 00 
48 40 
49 00 
49 00 
49 00 
49 07 
49 10 
45 40 
45 35 
49 02 
49 02 
49 01 
47 07 
45 38 
48 26 
Longi- 
tude. 
114 04 
114 45 
115 08 
115 17 
115 21 
116 19 
116 28 
116 44 
117 45 
118 05 
118 28 
119 24 
120 00 
120 00 
120 00 
120 49 
120 49 
121 23 
122 00 
122 12 
122 25 
122 28 
East dec- 
lination. 
22 56 
22 50 
22 36 
22 28 
22 27 
22 19 
22 10 
21 57 
22 11 
22 15 
22 04 
22 06 
20 27 
21 44 
21 42 
20 51 
20 13 
21 20 
Dip. 
73 38 
73 30 
73 24 
73 09 
72 55 
72 59 
72 43 
72 30 
72 12 
72 39 
72 50 
72 34 
72 42 
69 49 
69 45 
72 
11 
70 39 
69 28 
71 30 
Total force. 
Br. units. 
13.522 
.496 
.481 
.460 
.443 
.423 
.401 
.238 
.334 
.357 
.361 
306 
.315 
.091 
.087 
.257 
.234 
.226 
.111 
.026 
.148 
C.G.S. 
units. 
0. 6235 
0. 6223 
0. 6216 
0. 6206 
0. 6198 
0. 6189 
0. 6179 
0. 6104 
0. 6148 
0. 6159 
0. 6161 
0. 6135 
0. 6139 
0. 6036 
0. 6034 
0. 6113 
0. 6102 
0. 6098 
0. 6045 
0.6006 
0. 6062 
ELEVATIONS. 
Elevations were determined along and near the boundary by both 
the American and British parties throughout the progress of the sur- 
vey. Most of them were measured barometrically; a few were deter- 
mined by triangulation. 
Among the State Department papers is a short summary or table of 
heights determined by the British, and a longer and incomplete list 
of elevations determined by the United States parties. 
The British list, contained on two leaves of blue foolscap paper, is enti- 
tled: "Abstract of the principal heights determined by barometrical 
measurements on the line of the North American boundary in the 
years 1859, 60-61." 
The table contains eight columns. The first gives the year; the 
second, name of station; third, latitude; fourth, longitude; fifth, 
barometer (always marked A or M, meaning probably aneroid or 
mercurial); sixth, number; seventh, elevation above sea level; eighth, 
how determined. The paper is not dated or signed. Columns 2, 3, 
4, and 7 of that table are here printed on pages 43 and 44. 
