28 
SURVEY OF IDAHO-MONTANA BOUNDARY LINE. [bull.it. 
method and tables given in the Manual of Surveying Instruction 
issued by the General Land Office, 1894, pages 109-119. An exampi 
of record and computation follows. 
[July 19, 1898. Stadia B 77. D. L. Reaburn, observer.] 
Azimuth mark 
Polaris 
Polaris . 
Azimuth mark 
Azimuth mark 
Polaris 
Polaris.. 
Azimuth mark 
Azimuth mark 
Polaris 
TELESCOPE DIRECT. 
Time. 
03 40 
A. 
03 30 
1 19 00 
180 03 30 
1 18 30 
Mean. 
03 30 
1 18 45 
Angle. 
1 15 1 
TELESCOPE REVERSED. 
9 15 18 
180 23 00 
180 02 30 
22 30 
180 02 30 
180 22 45 
02 30 
1 20 1* 
TELESCOPE REVERSED. 
9 30 00 
35 14 00 
36 38 30 
215 14 00 
216 38 30 
35 14 00 
36 38 30 
1 24 30 
TELESCOPE DIRECT. 
9 33 30 
40 00 
14 00 
216 40 00 
215 14 00 
40 00 ._ 
14 00 " 1 26 00 
TELESCOPE DIRECT. 
45 
81 12 00 
82 39 00 
261 12 00 
262 39 00 
81 12 00 
82 39 00 
1 27 00 
TELESCOPE REVERSED. 
Polaris 
Azimuth mark 
9 41 45 
82 41 00 
81 12 00 
262 40 30 
261 11 30 
262 40 45 
81 11 45 
1 29 00 
[July 19, 1898. Stadia Q 77. Latitude 48° 03' ; longitude 116° 03'. Watch fast 42™ 36* on local time.] 
Upper culmination Polaris, July 15 17 
H. M. 
Reduction to July 18 
43.5 
-11, 
Upper culmination July 18, being culmination preceding time of ob- 
servation on July 19 ..... . 
