IV CONTENTS OE VOL. XXII. SIXTH SERIES. 



Page 

 Notices respecting New Books : — 



Publications of the U.S. Coast and Geodetic Survey . . 219 

 Proceedings of the Geological Society : — 



Mr. P. L. Sherlock on the .Relationship of the Permian 



_ to the Trias in Nottinghamshire 220 



Intelligence and Miscellaneous Articles: — 



On the Equation of Continuity of the Liquid and Gaseous 



States of Matter, by A. Batschinski 221 



The Principle of Relativity, by E. M. Lemeray 222 



The Mode of Ionization by X-Ray s, by Prof. W'. H. Bragg. 222 

 Correction to his Paper on the "Longitudinal and Trans- 

 verse Mass of an Electron," by W. F. G. Swarm 223 



Annual Tables of Constauts and Numerical Data 223 



NUMBER CXXVIIL— AUGUST. 



Lord Rayleigh on the Calculation of Chladni's Pigures for a 



Square Plate 225 



Prof. L. P. Wheeler : An Experimental Investigation on the 



Eeflexion of Light at certain Metal-Liquid Surfaces .... 229 

 Dr. J. W. Nicholson on the Number of Electrons concerned 



in Metallic Conduction . . . , 245 



Dr. J. W. Nicholson on the Optical Properties of Fused 



Metals 266* 



Dr. W. C. M C C. Lewis on the Latent Heat of Vaporization 



of Liquids ; 268 



Mr. Norman Campbell on Delta Pays 276 



Mr. Andrew Stephenson on Absorption and Dispersion .... 303 

 Mr.B.B. Sangster : Some Consequences of Fresnel's Reflexion 



of Light Theory, with Formulae for Determining the Angle 



of Incidence in order to reflect 1/nth the Incident Light. . 305 

 Prof. H. du Bois and Prof. H. Rubens on Polarization of 



Un diffracted Long- waved Heat Pays by Wire Gratings . . 322 

 Mr. G. F. Becker on some New Mechanical Quadratures . . 3-12 

 Mr. A. J. Lotka on the Patios which the Amounts of 



Substances in Radioactive Equilibrium bear to one another. 353 

 Notices respecting New Books : — 



Bulletin of the Bureau of Standards 351 



U.S. Coast and Geodetic Survey : Directions for Magnetic 



Measurements by D. L. Hazard 355 



Intelligence and Miscellaneous Articles : — 



On the Laws of Molecular Attraction, bv Dr. R.D.Kleeman 355 



