Vl CONTENTS OF VOL. XLII.— SIXTH SERIES. 



Page 



Mr. H. T. Jessop on Corim's Method of Determining the 

 Elastic Constants of Glass. (Plates XVIII. & XIX.) 551 



Dr. A. C. Crehore on an Atomic Model based upon Electro- 

 magnetic Theory. 1 569 



Sir J. Larmor on Escapements and Quanta 592 



Sir J. Larmor on Non-Radiating Atoms . . 595 



Mr. A. Gr. Shenstone on the Effect of an Electric Current on 

 the Photoelectric Effect 596 



Mr. J. L. Glasson on Attempts to Detect the Presence of 

 Neutrons in a Discharge Tube . 596 



Notices respecting New Books : — 



The Formation of Images by Optical Instruments .... 600 



NUMBER CCLI.— NOVEMBER. 



Prof. A. 0. Rankine and Mr. C. J. Smith on the Viscosity and 

 Molecular Dimensions of Gaseous Ammonia, Phosphine, 

 and Arsine 601 



Prof. A. O. Rankine and Mr. C. J. Smith on the Viscosities 

 and Molecular Dimensions of Methane, Sulphuretted Hy- 

 drogen, and Cyanogen 615 



Prof. T. H. Havelock on the Solution of an Integral Equation 

 occurring in certain Problems of Viscous Fluid Motion . . 620 



Prof. T. H. Havelock on the Decay of Oscillation of a Solid 

 Body in a Viscous Eluid 628 



Prof. H. H. Jeffcott on the Whirling Speeds of a Loaded 

 Shaft supported in Three Bearings 635 



Prof. Nihal Karan Sethi on the Diffraction of Light by Cylin- 

 ders and Spheres immersed in a Medium of nearly equal 

 Refractive Index. (Plate XX.) 669 



Prof. E. P. Adams on fhe Corbino Effect in Iron 677 



Prof. C. V. Raman and Mr. K. Seshagiri Rao on the Colours 

 of Mixed Plates.— Part III 679 



Mr. E. Buckingham on the Method of Dimensions 696 



Dr. J. A. Crowther on " J " Radiation 719 



Prof. R. W. Wood on Hydrogen Spectra from Long Vacuum 

 Tubes. (Plates XXI. & XXII.) 729 



Prof. F. Horton and Miss A. 0. Davies on the Production of 

 Radiation and Ionization by Electron Bombardment in Pure 

 and in Impure Helium 746 



Mr. A. L. Narayan on Sounds of Splashes. (Plate XXIII.) 773 



Mr. W. Hughes on the Derivation of Partington's Equation 

 from the General Equation of the Ionization Isotherm . . . 776 



Mr. E. Twyman on an Interferometer for Testing Camera 

 Lenses. (Plate XXIV.) 777 



Mr. H. T. Flint on the Transformation of the Equation of 

 Motion of the Dynamics of Continuous Media in the Re- 

 stricted Principle of Relativity * 794 



