IV CONTENTS OF VOL. XXXV. FOURTH SERIES. 



Page 



Prof. E. Edlund's Investigation of the Electric Light 103 



Mr. R. Moon on the Integration of the General Linear Partial 



Differential Equation of the Second Order 118 



M. Henri de Saussure's Observations on the Humming Sound 



produced on Mountains by Electricity 123 



Mr. J. Clerk Maxwell on the Dynamical Theory of Gases. ... 129 



M. Justus von Liebig on Silvering Glass 146 



Proceedings of the Royal Society : — 



Mr. R. Warington on some Alterations in the Composition 

 of Carbonate-of- Lime Waters, depending on the influ- 

 ence of Vegetation, Animal Life, and Season 147 



Proceedings of the Geological Society : — 



Mr. W. W. Stoddart on the Lower Lias of Bristol 153 



Mr. C. O. Groom-Napier on the Lower Lias Beds occurring 



at Cotham, Bedminster, and Keynsham, near Bristol .... 154 

 Mr. W. B. Dawkins on the Dentition of Rhinoceros 



Etruscus, Falc 154 



On Stellar Spectra, by Father Secchi 155 



On an Improved Method of dividing Alcohol and other Ther- 

 mometers, by William Ackland, Esq. 156 



On the Dialysis of Induced Currents, by M. E. Bouchotte .... 158 

 Method of Galvanically producing Hollows and Relief without 

 the aid of Varnish, by M. Balsamo 159 



NUMBER CCXXXVL— MARCH. 



M. V. Regnault on the Velocity of the Propagation of Waves 



in Gaseous Media 161 



Mr. D. Fojbes's Researches in British Mineralogy 171 



Mr. W. R. Grove's Experiment in Magneto-Electric Induc- 

 tion 1 84 



Mr. J. Clerk Maxwell on the Dynamical Theory of Gases .... 185 

 Prof. How's Addendum to Contributions to the Mineralogy of 



Nova Scotia 218 



Mr. R. Moon on the Integration of the General Linear Partial 



Differential Equation of the Second Order 219 



M. C. Sondhauss on the Sounds produced by a Jet of Water. . 234 

 Proceedings of the Royal Society : — 



Mr. W. Huggins on a Hand Spectrum-Telescope 239 



On Stellar Spectra, by Father Secchi 241 



On Oxychloride of Zinc as a Cement, by Dr. Tollens 242 



Experiments on the Permeability of Cast Iron by the Gases of 

 Combustion, by MM.H. Sainte-Claire Deville and Troost. . 243 



