PHILOSOPHICAL 
TRANSACTIONS 
OF THE 
ROYAL SOCIETY 
OP 
LONDON. 
(A.) 
FOR THE YEAR MDCCCXCIII. 
VOL. 184. 
LONDON: 
FEINTED BY HAEEISON AND SONS, ST. MAETIN's LANE, W.C., 
^rint-ers in ©rbinarg to fitr Paicstji. 
MDCCCXCIV. 
