18 
GEOGRAPHIC TABLES AND FORMULAS. 
[BULL. 214. 
E. To refer to any other than the tabular longitude: Add m .16 for 
each 15° east of the ninetieth meridian, and subtract m .16 for each 
15° west of the ninetieth meridian. 
Table 2. — Azimuth of Polaris when at elongation for any year between 1902 and 1910. 
Latitude. 
1902. 
1903. 
1904. 
1905. 
1906. 
1907. 
1908. 
1909. 
1910.0 
O ' 
o / 
o / 
o / 
o / 
O 1 
o / 
o / 
O ' 
25° 
1 20.5 
1 20. 1 
1 19.8 
1 19.4 
1 19.1 
1 18.7 
1 18.4 
1 18.1 
1 17.7 
26 
21.1 
20. S 
20.5 
20.1 
19.8 
19. 4 
19.1 
18.7 
18.4 
27 
21.9 
21.5 
21.2 
20.8 
20.5 
20.1 
19.8 
19.4 
19.1 
28 
22.6 
22. 2 
21.9 
21.6 
21.3 
20.9 
20.5 
20.1 
19.8 
29 
23.4 
23.0 
22. 7 
22.4 
22. 1 
21.7 
21.3 
20.9 
20. 5 
30 
24.2 
23.9 
23. 5 
23.1 
22.8 
22.4 
22. 1 
21.7 
21. 3 
31 
25.1 
24.7 
24.4 
24.0 
23.6 
23. 2 
22.9 
22. 5 
22. 2 
32 
26.0 
25.6 
25.3 
24.9 
24.5 
24.1 
23.8 
23. J 
23. 1 
33 
27.0 
26. 6 
26. 2 
25.9 
25.5 
25.1 
24.7 
24.3 
24.0 
34 
28.0 
27.6 • 
27.2 
26.9 
26.5 
26.1 
25.7 
25. 3 
25. 
35 
29.0 
28.7 
28.3 
27.9 
27.5 
27.1 
26.8 
26. 1 
26. 
36 
30.1 
29. 8 
29. 1 
29.0 
28.6 
28.2 
27.9 
27.5 
27. 1 
37 
31.3 
30.9 
30. 5 
30.1 
29.7 
29.3 
29.0 
28.6 
28. 2 
38 
32.6 
32.2 
31.8 
31.4 
31.0 
30. 6 
30. 2 
29.8 
29.4 
39 
33.9 
33.5 
33.1 
32.7 
32. 3 
31.8 
31.4 
31.0 
30.6 
40 
35.2 
34.8 
34.4 
34.0 
33.6 
33. 2 
32.8 
32.4 
32.0 
41 
36.7 
36.2 
35.8 
35.4 
35.0 
34. 6 
34. 2 
33.8 
33.4 
42 
38.2 
37.7 
37.3 
36.9 
36.5 
36.0 
35.6 
35.2 
34.8 
43 
39.8 
39. 3 
38.9 
38.5 
38.1 
37.6 
37. 2 
36. S 
36.3 
44 
41.4 
41.0 
40.5 
40.1 
39.7 
39.2 
38.8 
38. I 
37. 
45 
43.2 
12.7 
42.3 
11. N 
41.4 
40.9 
40.5 
40.1 
39.6 
46 
45.0 
44. 6 
44.2 
43.7 
43. 2 
42.7 
42.3 
41.9 
41.4 
47 
46.9 
46.5 
46.0 
15. 6 
45. 1 
44.6 
44. 2 
IH. 7 
43.3 
48 
49.0 
48.6 
48.1 
47.7 
47.2 
46.7 
in.:; 
45.8 
45.3 
49 
51.2 
50. 7 
50. 2 
49.8 
49.3 
48.8 
48.4 
47.9 
17.4 
50 
1 53.5 
1 53.0 
1 52.5 
1 52.0 
1 51.5 
1 51.0 
1 50.6 
1 50.1 
1 49.6 
The above table was computed with mean declination of Polaris fo 
each } r ear. A more accurate result will be had by applying to the 
tabular values the following correction, which depends on the difference 
of the mean and the apparent place of the star. The deduced azimuth 
will in general be correct within 0\3. 
For middle of— 
Correction. 
For middle of — 
Correction. 
J anuary 
/ 
-0. 4 
-0.3 
0. 2 
0.0 
+ 0.2 
+0.3 
July 
/ 
+0.3 
+0.1 
-0.1 
-0. 3 
0. 6 
-0.8 
February 
August . 
March 
September 
April 
May 
| June 
October 
November , 
December 
