PHILOSOPHICAL 
T RANSACTI 0 N 
OF THE 
ROYAL SOCIETY 
OF 
LONDON. 
(A.) 
FOR THE YEAR MDCCCXCII. 
VOL. 183. 
PRINTED BY HARRISON AND SONS, ST. MARTIN^ LANE, W.C., 
printers in (Drbinarg to fj*r UTajestg. 
MDCOCXCIIl. 
