C ^3S 1 
EXPERIMENTS ON THE DIPPING NEEDLE. 
In Hudfon’s Bay, Aiiguft 14, 1774, lat. 56° 53' North, 
long. 85° 22' Weft from London, variation per azi« 
ninth 24° Weft. 
82 o 
82 o 
82 15 
82 20 
82 50 
82 35 
82 30 
82 15 
I The mdex plaeed Eaft. 
I The index placed Weft. 
I The poles changed, and index Eaft 
I The index placed Eaft. 
Thefe experiments were made in conjnnflion with 
Captain Richards, in the cabbin of the Prince Rupert, 
whilft flie lay amongft ice. The fliip frequently varied 
the pofttion of her head a point of the compafs ; but by 
replacing the inftrument as often as we found occafton, 
I have the greateft reafon to think thefe obfervations 
(which took up above three hours) are pretty accurate. 
EX PE- 
