CONTENTS OF VOL. IT. — FOURTH SERIES. Vll 



Page 



On the Constitution of the Atmosphere, by M. Lewy 500 



On the Magnetism of Gases, by M. PlUcker 503 



On the Formation of Dolomite by the action of Magnesium 



Vapours, by M. Durocher 504 



New Photographic Process upon Glass, by M. J. R. Le Moyne 505 

 Reflexion of Light from the Surface of Liquids, by M. Jamin. . 507 



Meteorological Observations for October 1851 507 



Table 508 



NUMBER XIV.— SUPPLEMENT TO VOL. IL 



Mr. W. J. M. Rankine on the Centrifugal Theory of Elasticity, 

 as applied to Gases and Vapours 509 



M. W. Hankel's Account of some Experiments upon the Elec- 

 tricity of Flame, and the Electric Currents thereby originated 542 



M. R. Clausius on the Influence of Pressure upon the Freezing 

 of Fluids 548 



Prof. Thomson's Applications of the Principle of Mechanical 

 Eff'ect to the Measurement of Electro-motive Forces, and of 

 Galvanic Resistances, in absolute Units 551 



Proceedings of the Royal Society 562 



On the Hypotheses relating to the Luminous ^ther, and an 

 experiment which appears to demonstrate that the Motion of 

 Bodies alters the velocity with which Light propagates itself 

 in their interior, by M. H. Fizeau 568 



On the Formation of Anhydrous Crystallized Alum, by the 

 Prince of Salra-Horstmar 573 



On the Composition of the Gases evolved on the production of 

 Coke from Coal, by M. Ebelmen 573 



Magnecrystallic property of Calcareous Spar, by Prof. Thomson 574 



Observations upon the Radiation of Luminous Bodies, by M. 

 Baudrimont 575 



Index , 576 



