IV CONTENTS OF VOL. L. FIFTH SERIES. 



NUMBER CCCIIL— AUGUST. 



Page 

 Lord Kelvin on the Motion produced in an Infinite Elastic 

 Solid by the Motion through the Space occupied by it of a 



Body acting on it only by Attraction or Repulsion 181 



Prof. Louis T. More on the Supposed Elongation of a Di- 

 electric in an Electrostatic Field 198 



Lord Rayleigh on a Theorem analogous to the Virial Theorem. 210 

 Mr. R. E. Gwyther on the Classes of Progressive Long Waves. 213 



Prof. A. "W. Bickerton on Cosmic Evolution 216 



K. Tsuruta on some Effects of Twist on the Thermo- 

 electric Qualities of Iron 223 



Dr. J. H. Gladstone on the Want of Uniformity in the 



Action of Copper-Zinc Alloys on Nitric Acid 231 



Mr. Harold A. Wilson on the Velocity of Solidification and 



Viscosity of Supercooled Liquids . . 233 



Mr. J. Rose-Innes on the Theory of the Constant-volume 



Gas-thermometer 251 



Mr. John Buchanan on Torsion-Structure in the Alps 261 



Proceedings 'of the Geological Society : — 



Miss Ethel Wood on the Lower Ludlow Formation and 



its Graptolite-Fauna 265 



Mr. Prank Rutley on some Eruptive Rocks from New 



Zealand 267 



Baron A. E. Nordenskiold on the Discovery and Occur- 

 rence of Minerals containing Rare Elements 268 



NUMBER CCC1V.— SEPTEMBER. 



Prof. AV. McP. Orr : Considerations regarding the Theory 

 of Electrons '.269 



Prof. .T. J. Thomson on the Genesis of the Ions in the Discharge 

 of Electricity through Gases . 278 



Mr. Philip E. Shaw on some Lecture Experiments illustrating 

 Syntony 283 



Prof. Svdney Toting ou the Law of Cailletet and Mathias and 

 the Critical Densitv 291 



Lord Kelvin on the Duties of Ether for Electricity and Mag- 

 netism 305 



Mr. R. E. Gwyther's Appendix to the Paper on the Classes 

 of Progressive Lone: Waves 308 



