Makerstoua 
Lat. 55°35 North: 
Tong. O10" Wot Greenwicw)|-|1 |} 1th yy th 
Ye5# maine 
Trevandnun 
Lat. 8° 31' North: 
Long. 58" Kast 
7-8) 
Singapore 
Lat, 1” 19’ North 
Long 6" 58™ Bast 
Te ol 
Tobarton 
Tat. 2° 52 South 
Long. 9" 50™ Bast 
Wes 

Means of the horizontal intensity of the Earths Magnetism,at Makerstoun, Trevandrum, Singapore,and Hobay 
July 
a3 21 
August 
he) 
September 
Su 

October 
R 20 
Nov 
@ 
ae 
10 



mber 
1 
Dece 
8 15 



























































































































































































































































































































oe 























































































































































































































