AZIMUTH AN!) TRIANGULATION. 
[D. L. Reaburn, computer. 
29 
Computa- 
tion of 
first ob- 
servation. 
Computa- 
tion of 
second ob- 
servation. 
Computa 
tion o! 
third ob- 
servation. 
Computa 
tion of 
fourth ol' 
servation. 
Computa 
tion of 
fifth ob- 
servation 
Computa- 
tion of 
sixth ob- 
servation. 
me of observation 
atch correction 
}l. III. 
9 03.7 
-42. 6 
8 21.1 
+24 
h, ni. 
9 L5.3 
-42.6 
8 32.7 
+24 
h. m. 
9 30.0 
—12.6 
8 47.4 
+24 
/). m. 
9 33.5 
—42.6 
8 50.9 
+24 
Ii. in. 
9 39.7 
—42.6 
8 57.1 
+24 
9 41.7 
—42.6 
cal mean time 
8 59. 1 
+24 
btract up. culminal ion 
32 21.1 
-17 31.7 
32 32.7 
17 31.7 
32 47.4 
17 31.7 
32 50.9 
17 31.7 
32 57.1 
17 31.7 
32 59.1 
17' 31.7 
14 49.4 
23 56.1 
15 01.0 
23 56.1 
15 15.7 
23 56.1 
15 19.2 
23 56.1 
15 25.4 
23 56.1 
15 27.4 
btract from 
23 .v.. 1 
9 06.7 
O / II 
181 13 45 
1 15 15 
179 58 30 
8 55.1 
o / // 
181 18 30 
1 20 15 
179 58 15 
8 40.4 
181 23 12 
1 24 30 
179 58 42 
8 36.9 
o / // 
181 24 16 
1 26 00 
179 58 16 
8 30,7 
181 26 00 
1 27 00 
179 59 00 
8 28.7 
;imuth Polaris- 
o ' II 
181 27 00 
1 29 00 
179 58 00 
Mean L79 c 58' 33" showing this portion of the random line to 
?viate from the true meridian by 1' 27". 
TRIANGULATION. 
The triangulation connecting the Spokane base with the boundary 
tie was done with an 8-inch micrometer theodolite, reading by two 
icrometers to two seconds and by estimation to one second. Direc- 
ons were read in sets, each set consisting of pointings with telescope 
irect and reversed from left to right and from right to left. Four 
• more of such sets were usually taken. A few secondary locations 
i or near the boundary line were made with the transit. All of the 
bservations were reduced in the office by least squares. 
The following list gives descriptions, latitude, longitude, azimuths, 
ad distances of the triangulation stations determined which have a 
earing on the boundary line. 
A diagram of the triangulation is also presented. (See PL V.) 
SPOKANE, EAST BASE. 
Station mark: A dressed slone, 7 by 7 by 36 inches, set 30 inches in 
round, 25 feet north of north rail, and 94 feet eastward from sign 
"U. s. 
larked "Trent 1 mile." The slone is marked on top + 
E. Base." 
