SURVEY OF THE BRITISH ISLES FOR THE EPOCH JANUARY 1, 1886. 287 
Our attention was first called to it by the fact that the Declination found in 1888 
at Spalding is less than that observed at King’s Lynn in 1886. Allowing for the 
difference of longitude, the Declination at Spalding ought to be about 16'greater than 
at King’s Lynn. The two values found and reduced to epoch were 
King’s Lynn, 1886 . 17 57‘9, 
Spalding, 1888 . 17 51‘6. 
Thus, if the King’s Lynn value is normal, that at Spalding is 22' too small. 
Fig. 20. 
A special survey was therefore made of the district with the following results. 
A chain of stations was run along the edge of the Wash. The measurements at 
King’s Lynn were repeated near to, but not on the same site, and observations were 
made at Clenchwarton and Sutton Bridge between King’s Lynn and Spalding. The 
latitudes of these stations did not differ by more than 2'; the longitudes and Declina¬ 
tions were as follows :— 
Stations. 
Longitude. 
Declination. 
Jan. 1, 1886. 
King’s Lynn (Gaywood 1888) 
0 26-0 E. 
O / 
18 1-7 
King’s Lynn (1886) 
0 24-3 E. 
17 57-9 
Clenchwarton (1888) . . . 
0 21-3 E. 
18 10-3 
Sutton Bridge (1888) . 
0 11-8 E. 
17 54T 
Spalding (1888). 
0 8-6 W. 
17 51-6 
