PHILOSOPHICAL 
T I 0 N 
OP THE 
ROYAL SOCIETY 
OP 
LONDON. 
(B.) 
FOR THE YEAR MDCCCLXXXYII. 
VOL. 178. 
LONDON: 
Printed by harrison and sons, st. martin’s lane, vv c., 
printers in (Drbimun to ^rr glajestjr. 
MDCCCLXXXVIIT. 
