PHILOSOPHICA L 
TRANSACTION S, 
t 
O F 
THE ROYAL SOCIETY 
O F 
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0 
LONDON. 
VOL. LXVI. For the Year 1776. 
PART II. 
LONDON, 
PRINTED BY W. BOWYER AND J. NICHOLS! 
FOR LOCKYER DAVIS, IN HOLBOURN, 
PRINTER TO THE ROYAL SOCIETY. 
MDCCLXXVII. 
