22 
SURVEY OF IDAHO-MONTANA BOUNDARY LINE. [bull. 170. 
of stars were selected from Safford's Catalogue of 2018 Stars. The 
apparent day places, however, were obtained from the Berliner Jahr- 
buch whenever possible ; otherwise, they were computed by the usual 
methods, as explained in the American Ephemeris. 
Fifty-nine observations upon twenty-seven pairs of stars gave a 
weighted mean value for the latitude of the pier of 47° 39' 51 ".46 
i 0".13. The results for different nights and for different pairs of 
stars are given in the following table : 
Results for latitude, Spokane {Washington) Station, 1896. 
[S. S. Gannett, observer and computer.] 
Stars (Safford), num- 
ber and class. 
Individual results. 
47° 39'. 
Aug. 6. Aug 
Aug. 
Aug. 9. 
Mean. 
Weight. 
748 A, 
766 A, 
IT! 
795 
809 
814 
814 A, 
809 C, 
809 C, 
814 A, 
882 AA, 
901 C, 
903 AA, 
931 B, 
957 A, 
987 A, 
989 B, 
1011 B, 
1016 B, 
1032 B, 
1032 B, 
1059 A, 
1188 AA, 
1129 A, 
1133 A A, 
1161 A, 
1202 AA, 
759 
A 
782 
C 
782 
C 
801 A A 
852 
A 
852 
A 
856 AA 
856 AA 
834 AA 
834 A A 
917 
C 
903 AA 
920 
c 
949 
A 
969 
A 
989 
B 
1000 AA 
1032 
B 
1032 
B 
1037 
B 
1047 
c\ 
1078 
A 
1129 
A 
1146 
B 
1158 
A 
1173 
C 
1207 
A 
Seconds. 
Seconds. 
53.81 
52.46 
52.10 
51.62 
52.82 
Seconds. 
51.54 
50. 05 
51.69 
50.04 
50.16 
50.90 
50. 78 
52.56 
52.15 
53.58 
52.90 
51.36 
51.58 
51.59 
52.21 
53.54 
53.06 
50. 70 
50.92 
49.68 
49.57 
50.80 
52.08 
53.12 
52.38 
51.57 
51.78 
52.02 
51.75 
51.37 
53.37 
50. 30 
53.00 
Seconds. 
50. 17 
53.27 
51.46 
50.66 
49.01 
49.80 
49.81 
50.58 
51.05 
50.65 
49.71 
51.30 
52.52 
51.74 
51.57 
52.66 
51.20 
50.15 
49.14 
51.07 
52.63 
Seconds. 
50.85 
51.66 
51.46 
51.02 
49.99 
49.88 
50.24 
50.79 
49.81 
50.58 
52.08 
51.05 
50. 65 
51.13 
51.67 
53.26 
52.37 
51.57 
52.11 
51.49 
51.25 
51.32 
51.16 
53.45 
52.63 
50. 30 
53.03 
1.72 
1.28 
0.79 
1.69 
1.62 
2.40 
1.80 
1.32 
0.80 
0.96 
0.80 
0.80 
0.80 
1.63 
1.72 
2.70 
2.90 
0.88 
2.05 
2.47 
1.53 
2.99 
2.55 
1.63 
0.96 
0.79 
1.80 
Weighted mean, 47° 39' 51". 46 ± 0".13. 
