vin CONTENTS. 



PAGE 



XXV. On the Possibility of combining two or more Probabilities of the same 

 Event, so as to form one Definite Probability. By the Right Rev. 

 Bishop Terrot, V.P.R.S.E., . . . . . .369 



XXVI. Researches on Chinoline and its Homologues. By C. Greville Wil- 

 liams, Assistant to Dr Anderson, University of Glasgow, . 377 



XXVII. On Formats Theorem. By H. F. Talbot, Esq., F.R.S., &c. Com- 

 municated by Professor Kelland, .... 403 



XXVIII. On a Proposition in the Theory of Numbers. By Balfour Stewart, 

 Esq., of the Kew Observatory. Communicated by Professor 

 Kelland, ....... 407 



XXIX. On the Prismatic Spectra of the Flames of Compounds of Carbon and 



Hydrogen. By William Swan, F.R.S.E., . . .411 



XXX. On the Laws of Structure of the more Disturbed Zones of the Earth's 



Crust. By Professor H. D. Rogers, Hon. F.R.S.E., . . 431 



PART IV. (1856-7.) 



XXXI. On New Forms of Marine Diatomacea, found in the Firth of Clyde 

 and in Loch Fine. By William Gregory, M.D., F.R.S.E., 

 Professor of Chemistry. Illustrated by numerous Figures, drawn 

 by R. K. Greville, LL.D., F.R.S.E., . . . .473 



XXXII. On the Urinary Secretion of Fishes, with some Remarks on this Se- 

 cretion in other Classes of Animals. By John Davy, M.D., 

 F.R.SS.Lond.&Edin., . . . . .543 



XXXIII. On the Minute Structure of Involuntary Muscular Fibre. By Jo- 



seph Lister, Esq., F.R.C.S. Eng. &Edin., Assistant- Surgeon to 

 the Royal Infirmary, Edinburgh. Communicated by Dr Chris- 

 tison, ........ 549 



XXXIV. On a Dynamical Top, for exhibiting the Phenomena of the Motion 



of a System of Invariable Form about a Fixed Point, with some 



