GEOGKAPHIC TABLES AND FOKMULAS. 
[BULL, 234. 
tabi.es. 
Table 1. — Local mean (astronomical) time of the culminations and elongations of 
Polaris in the year 1902. 
[From Magnetic Declination Tables, U. S. Coast and Geodetic Survey. Computed for latitude 40° 
north and longitude 90° or 6i» west of Greenwich.] 
Date. 
East elonga- 
tion. 
Upper culmi- 
nation. 
West elonga- 
tion. 
Lower culmi- 
nation. 
h 
m 
18 
38.7 
17 
43.4 
16 
36.3 
15 
41.0 
14 
45. 8 
13 
50.7 
12 
43.7 
11 
48.6 
10 
45.7 
9 
50.8 
8 
44.2 
7 
49.3 
6 
46.7 
5 
51.8 
4 
45.3 
3 
50.4 
2 
43.8 
1 
48.9 

46.0 
23 
47.2 
22 
40.4 
21 
45.2 
20 
42.2 
19 
46.9 
1902 
January 1 
January 15. . 
February 1 . 
February 15 
March 1 
March 15 
April 1 
April 15 
May 1 
May 15 
June 1 
June 15 
Julyl 
July 15 
August 1 
August 15 
September 1 . 
September 15 
October 1 
October 15 . . . 
November 1 . 
November 15 
December 1. . 
December 15. 
45. 
23 
22 
21 
20 
19 
18 
17 
16 
15 
14 
13 
12 
11 
10 
9 
8 
46.6 
39.5 
44.2 
49.0 
54.0 
47.0 
52.0 
49.1 
54.2 
47.5 
52.6 
50.0 
55.1 
48.6 
53.7 
47.1 
52.2 
49.3 
54.3 
47.5 
52.3 
49. 3 
54.0 
23 
22 
21 
20 
19 
18 
17 
16 
15 
14 
13 
12 
11 
10 
9 
8 
7 
40.6 
45.3 
38.2 
42.9 
47.7 
52.7 
45.6 
46.7 
43.8 
48.9 
42.3 
47.4 
44.8 
49.9 
43.4 
48.5 
41.9 
47.0 
44.1 
49.1 
42.3 
47.1 
44.1 
48.8 
23 
22 
21 
20 
19 
18 
17 
16 
15 
14 
13 
35.3 
40.0 
32.9 
37.7 
42.4 
47.3 
40.3 
45.3 
42.5 
47.6 
40.9 
46.0 
43.4 
44.6 
38.0 
43.1 
36.5 
41.6 
38.7 
43.7 
36.9 
41.8 
38.8 
43.6 
A. To refer the above tabular quantities to years subsequent to 1902: 
1. 4 minutes. 
For year 1903 add 
{add 2. 8 
^^^subtract 1. 1 
1905 add 0. 2 
1906 " 1.5 
1907 '^ 2.9 
(4.2 
[0.3 
1909 " 1.7 
1910 " 3.0 
1908 
up to March 1 
on and after March 1 
up to March 1 
on and after March 1 
