CONTENTS OF VOL. XXXIX. SIXTH SERIES. V 



Page 

 Prof. J. Joly and Mr. J. H. J. Poole : An attempt to deter- 

 mine if Common Lead could be separated into Isotopes 



by Centrifuging in the Liquid State 372 



Prof. J. Joly and Mr. J. H. J. Poole on the Effect of Centri- 

 fuging certain Alloys while in the Liquid State 376 



Notices respecting New Books : — 



J. H. Jeans's Problems of Cosmogony and Stellar 



Dynamics 377 



Prof. R. ~W. Wood's Researches in Physical Optics. 



Part II. Resonance Eadiation and Resonance Spectra. 379 

 Profs. L. C. Karpinski, H. Y. Benedict, and J. W. 



Calhoun's Unified Mathematics 380 



Prof. H. Lamb's An Elementary Course of Infinitesimal 



Calculus 381 



Proceedings of the Geological Society :- — 



Mr. H. Hamshaw Thomas on some Features in the 

 Topography and Geological History of Palestine .... 383 



NUMBER CCXXXIL— APRIL. 



Prof. W. E. Adeney and Mr. H. G. Becker on the Determi- 

 nation of the Rate of Solution of Atmospheric Nitrogen 

 and Oxygen by Water.— Part II. 385 



Dr. A. D. Kokker on the Contributions to the Electric Current 

 from the Polarization and Magnetization Electrons 404 



Prof. J. Ivunz : An Elementary Theory of the Scattering of 

 Light by Small Dielectric Spheres 416 



Prof. R. W. Wood on Light Scattering by Air and the Blue 

 Colour of the Sky ' 423 



Prof. E. Slate : An Alternative View of Relativity 433 



Mr. H. T. Flint : Applications of Quaternions to the Theory 

 of Relativity 439 



Dr. F. W. Aston on the Constitution of Atmospheric Neon. 

 (Plates VIII. & IX.) '.. 449 



Intelligence and Miscellaneous Articles : — 



On the Equation of State, by Megh Nad Saha and 

 Satyendra Nath Basu 456 





NUMBER CCXXXIIL— MAY. 



Prof. W. M. Hicks on the Spectrum of Copper 457 



Prof. A. O. Rankine on the Relation between Illumination 



and Electrical Conductivity in Selenium 482 



Prof. Q. Majorana on Gravitation : Theoretical and Expe- 



imental Researches 488 



