JOURNAL OF 



THE TRANSACTIONS 



Site fitturia JitHtititte, 



^j)il0sajjj)ical Sotiet)) of ireat fiiitaiit. 



EDITED BY THE HONOEARY SECEETAEY, 



CAPT. FRANCIS W. H. PETRIB, P.R.S.L., &c. 



VOL. XX. 



LONDON: 



(^ufalis})£li bg tfj£ Institute) 



INDIA : W. THACKER & Co. UNITED STATES : G. PUTNAM'S SONS, N.Y. 



AUSTRALIA and NEW ZEALAND : G. ROBERTSON & Co. Lim. 



CANADA : WILLARD Co., Lim., Toronto. 



S. AFRICA : JUTA & Co. Cape Town. 



PARIS : GALIGNANI. 



1887. 



ALL RIGHTS RESERVED. 



