526 
MR. A. W. RUCKER AXD DR. T. E. THORPE OA A MAGNETIC 
Table XL 
No. of district. 
H in 1886 
at Central station 
used in 1886. 
H in 1886 
at Central station 
used in 1891. 
H in 1891 
at Central station 
used in 1891. 
1 
Secular change 
1886-0 to 1891-0. 
I. 
1'5580 
1-5883 
1-6011 
+ -0128 
[I. 
1-6363 
1-6402 
1-6519 
117 
III. 
1 
1-7164 
1-7198 
1-7313 
115 
IV. 
1-7970 
1-7942 
1-8070 
i 
128 
i 
1-6650 
1-66.50 
1-6761 
111 
VI. 
1-6979 
T6977 
1-7083 
106 
VIT. 
1-8212 
1-8091 
1-8206 
115 
VIII. 
1-7053 
1-7090 
1-7197 
107 
i 
IX. 
1-7694 
1-7761 
T7863 
102 
