SURVEY OF THE BRITISH ISLES FOR THE EPOCH JANUARY I, 1891. 525 
Table X. 
No. of disti'icfc. 
Declination in 1886 
at Central station 
used in 1886. 
Declination m 1886 
at Central station 
used in 1891. 
Declination in 1891 
at Central station 
used in 1891. 
Secular change 
1886-0 to 1891-0. 
I. 
21 38-8 
21 37-6 
20 58-4 
- 39-2 
II. 
20 55-6 
20 44T 
20 7-9 
- 36-2 
III. 
19 39-0 
19 27'4 
18 51-8 
- 35-6 
IV. 
18 6-6 
18 20-8 
17 45 7 
- 35-1 
V. 
22 41-3 
22 42T 
22 3-9 
- 38-2 
VI. 
21 25-6 
21 21-9 
20 46-0 
- 35-9 
VII. 
19 6-2 
19 15-5 
18 38-4 
- 37-1 
VIII. 
22 35 0 
22 317 
21 53-9 
- 37-8 
IX. 
20 19-7 
20 9-5 
19 35-5 
- 34-0 
