PHILOSOPHICAL 
AN S ACTIONS 
OF THE 
ROYAL SOCIETY 
OF 
LONDON. 
FOR THE YEAR MDCCCLXXXVI. 
VOL. 177.—PART II. 
LONDON: 
PRINTED BY HARRISON AND SONS, ST. MARTINS LANE, W.C., 
printers in ©rbinarg to ptr Ulnjcstg. 
MDCCCLXXXVII. 
