PHILOSOPHICAL 
i 
TRANSACTIONS, 
OF THE 
ROYAL SOCIETY 
t I 
O F 
LONDON. 
VOL. LXXIX. For the Year 17 89. 
* LONDON, 
SOLD BY LOCKYER DAVIS, AND PETER ELMSLY, 
PRINTERS TO THE ROYAL SOCIETY. 
MDCCLXXXIX. 
