PHILOSOPHICAL 
TRANSACTIONS 
OF THE 
EOYAL SOCIETY 
OP 
LONDON. 
(A.) 
FOR THE YEAR MDCCCXCIII. 
VOL. 184. 
LONDON: 
FEINTED BY HAERISON AND SONS, ST. MARTIN’s LANE, W.C., 
printers in ©rbinarg io ^jcr |i(a]estg. 
MDCCCXCIV. 
