ON OBTAINING THE MERIDIAN 
57 
The table on the preceding page was computed with 
mean declination of Polaris for each year. A more ac¬ 
curate 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 
January 
/ 
— 0.5 
July 
/ 
+ 0.2 
February 
— 0.4 
August 
+ 0.1 
March 
— 0.3 
September 
— 0.1 
April 
— 0.1 
October 
— 0.3 
May 
+ 0.1 
November 
— 0.6 
June 
+ 0.2 
December 
— 0.8 
LOCAL CIVIL (NOT STANDARD) TIME OF THE ELONGATIONS 
OF POLARIS IN THE YEAR 1915. (COMPUTED FOR LATI¬ 
TUDE 40o NORTH AND LONGITUDE 90° OR 6h WEST 
OF GREENWICH) 
(From United States Coast and Geodetic Survey) 
Date 
Eastern Elongation 
Western Elongation 
1915 
h. 
m. 
h. 
m. 
January 1 
0 
51.7 
P. M. 
0 
46.0 
A. M. 
January 15 
11 
56.4 
A. M. 
11 
46.8 
P. M. 
February 1 
10 
49.2 
A. M. 
10 
39.7 
P. M. 
February 15 
9 
54.0 
A. M. 
9 
44.4 
P. M. 
March 1 
8 
58.7 
A. M. 
8 
49.2 
P. M. 
March 15 
8 
3.5 
A. M. 
7 
54.0 
P. M. 
April 1 
6 
56.6 
A. M. 
6 
47.1 
P. M. 
April 15 
6 
1.6 
A. M. 
5 
52.0 
P. M. 
May 1 
4 
58.7 
A. M. 
4 
49.2 
P. M. 
May 15 
4 
3.8- 
A. M. 
3 
54.2 
P. M. 
June 1 
2 
57.2 
A. M. 
2 
47.6 
P. M. 
June 15 
2 
2.4 
A. M. 
1 
52.8 
P. M. 
July 1 
0 
59.8 
A. M. 
0 
50.2 
P. M. 
July 15 
0 
5.0 
A. M. 
11 
55.4 
A. M. 
August 1 
10 
54.5 
P. M. 
10 
48.8 
A. M. 
August 15 
9 
59.8 
P. M. 
9 
54.1 
A. M. 
September 1 
8 
53.2 
P. M. 
8 
47.5 
A. M. 
September 15 
7 
58.3 
P. M. 
7 
52.6 
A. M. 
October 1 
6 
55.5 
P. M. 
6 
49.8 
A. M. 
October 15 
6 
00.6 
P. M. 
5 
54.9 
A. M. 
November 1 
4 
53.7 
P. M. 
4 
48.0 
A. M. 
November 15 
3 
58.6 
P. M. 
3 
52.9 
A. M. 
December 1 
2 
55.6 
P. M. 
2 
49.9 
A. M. 
December 15 
2 
00.4 
P. M. 
1 
54.7 
A. M. 
