VI CONTENTS OF VOL. XXVIII, FOURTH SERIES. 



Page 



Mr. A. C. Ramsay on the Erosion of Valleys and Lakes; a 

 Reply to Sir Roderick Murchison's Anniversary Address to 



the Geographical Society 293 



Prof. Bonn's Historic Notes on the Conservation of Energy .„ 311 

 Proceedings of the Royal Society : — 



Mr. T. Graham on the Properties of Silicic Acid and other 



analogous Colloidal Substances 314 



Proceedings of the Geological Society : — 



Mr. J. Powrie on the Fossiliferous Rocks of Forfarshire 



and their contents 321 



Prof. R. Harkness on the Reptiliferous Rocks and Foot- 

 print Strata of the North-east of Scotland 321 



Mr. J. Evans on some Bone- and Cave-deposits of the 



Reindeer-period in the South of France 321 



Prof. J. Helmersen on the Carboniferous Rocks of the 

 Donetz and the Granite- gravel of St. Petersburg. ..... 322 



Mr. G. Maw on a supposed Deposit of Boulder-clay in 



North Devon 322 



Dr. Young on the former existence of Glaciers in the High 



Grounds of the South of Scotland 323 



Mr. T. Belt on the Formation and Preservation of Lakes 



by Ice-action 323 



Mr. S. H. Wintle on the Geological Features of Hobart, 



Tasmania , 323 



On the Ebullition of Water, and on the Explosion of Steam- 

 boilers, by M. L. Dufour 324 



On the Application of Zeiodelite, by R. Bottger 326 



On the Determinations of Temperature in the depth of some Ba- 

 varian Mountain Lakes, by Prof. Jolly 326 



On the Meteorite of Albareto in the Modenese, by Dr. W. 

 Haidinger . « 327 



NUMBER CXC— NOVEMBER. 



Prof. Tyndall on Luminous and Obscure Radiation 329 



Mr. D. Forbes on Evansite, a new Mineral Species. 341 



M. E. Jochmann on Induction in a Rotating Conductor .... 347 

 Mr. J. Bishop on the Influence of the Pitch of the Tuning- 

 Fork on the Mechanism of the Human Voice 349 



Mr. C. Tornlinson on the Cohesion-Figures of Liquids. (With 



Two Plates.) 354 



Mr. E. J. Mills on a Defect in the Theory of Saturation .... 364 



Mr. J. Gill on the Dynamical Theory of Heat 367 



Father Secchi on Shooting- Stars 377 



Prof. Norton on Molecular Physics 382 



Notice.-; respecting New Books : — Prof. Church's Laboratory 



Guide for Students of Agricultural Chemistry 390 



