PHILOSOPHICAL 



TRANSACTIONS 



I OP THE 



EOYAL SOCIETY 



OF 



* , 



LONDON. 



(A.) 



FOR THE YEAR MDCCCLXXXVIII. 



VOL. 179. 



LONDON: 



PRINTED BY HARRISON AND SONS, ST. MARTINS LANE, W.C., 



printers in Oruhurn to jptr 



MDCCCLXXMX. 



