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EXPERIMENTS ON THE DIPPING NEEDLE. 
On the Holms in the entrance of Stromnefs Harbour, 
J une 23,1774. V ariatlon per azimuth 2 4^ Wef:erly . 
Long, from London 3° 30" Weft, lat. 58° 59' North. 
76 o' 
75 40 ' 
75 45 , 
76 55 1 
7610 I 
76 30 I 
The index placed Weft. 
The index placed Eaft. 
74 45 
75 30 
75 o 
The poles changed, and index Eaft. 
76 o 
74 45 
75 o 
The index placed Weft. 
The needle in all thefe obfervations was left to vibrate 
from an horizontal polition. The inftrument was fet 
on the top of the cafe (in which it was packed) and ftood 
in the open air, in a fine funny day. 
VoL. LX\. 
T 
EXPE- 
