PHILOSOPHICAL 
TRANSACTIONS 
OF THE 
ROYAL SOCIETY 
# t / 
OF 
LONDON. 
FOR THE YEAR MDCCCLXXXII. 
0 
VOL. 173. 
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LONDON: 
PRINTED BY HARRISON AND SONS, ST. MARTIN’S LANE, W.O., 
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cr 
MDCCCLXXXIIT, 
