transactions 
O F 
THE 
R O Y A 
T j 
s o 
CIET Y 
O F 
*• 
L O 
N 
D 
O N. 
. VOL. LXXIX. 
For the 
Year 1789, 
P 
A 
R T 
II, 
LONDON, 
SOLD BY LOCKYER DAVIS, AND PETER ELMSLY, 
PRINTERS TO THE ROYAL SOCIETY, 
MDCCLXXXIX, 
