vi COXTENTS OF VOL. XV. FOURTH SERIES. 



Page 

 Dr. C. Forbes on a quantity of Crabs thrown up on the 



beach in Pa3'ta Bay 3'21 



Sir R. I. Murchison on the Succession of Rocks in the 



Northern Highlands 322 



Signor Gemmellaro on the Gradual Elevation of a part of 



the Coast of Sicily ' 325 



Mr. T. F. Jamieson on the occurrence of transported Peb- 

 bles and Boulders at high levels in Aberdeenshire .... 325 

 On Fluorescence produced by the Aurora, by Dr. Robinson . . 326 

 Note on the Tangent-galvanometer, by G. Johnstone Stoney. . 327 

 On the daily Fall of the Barometer at Toronto, by Thomas Hoj)- 



kins. Esq • • • • • 3-.>7 



On the Action of the Electric Current on Aqueous Solutions of 

 Chlorine, Bromine, and Iodine, by M. A. Riche 328 



NUMBER CI.— MAY. 



Mr. J. J. Waterston on the Integral of Gravitation, and its 

 consequents with reference to the Measure and Transfer, or 



communication of Force 329 



Prof. Espy on the Law of Storms 345 



M. Poinsot on the Percussion of Bodies (continued) 349 



Mr. D. Vaughan on the Solar Spots and the Variable Stars . . 359 

 .Mr. A. Cayley on Cubic Transformation of an Elliptic Function. 363 

 Professors Tyndall and Huxley on the Structure and Motion of 



Glaciers 365 



Mr. J. Cockle on certain Researches of Euler 389 



Notices respecting New Books : — The Rev. G. F. Childc's 

 Investigations in the Theory of Reflected Ray-surfaces, and 



their relation to Plane Reflected Caustics 390 



Proceedings of the Royal Society : — 



Dr. Hofraann andM. A. Caliours on the Phosphorus-bases. 393 

 Prof. Smyth's Report of Proceedings of the Astronomical 



Expedition to Teneriflfe, in 1857 39G 



Mr. A. Claudet on the Phseuoiiienon of Relief of the Image 

 formed on the Ground Glass of the Camera Obscura , . 397 

 Proceedings of the Geological Society : — 



Mr. A. R. C. Selwyn on the Geology of the Gold-fields of 



A'ictoria 400 



Mr. J. Phillips on the Gold-field of Ballaarat, Victoria . . 401 

 Mr. W. Redaway on the Gold-diggings at Creswick Creek 



and Ballaarat 402 



Prof. Owen on some Outline-drawings and Plintographs of 

 tlie Skull of Zijgomaturus trilobus from Australia .... 403 



On Sonorous Flames, by W. B. Rogers, Esq 404 



Note on the Mode in which the Phosj)hates pass into Plants, bv 



M . P. Thenard '. 405 



On the Mechanical Equivalent of Heat, l)y P. i\. Favrc 406 



