VI CONTENTS OF VOL. XXX. SIXTH SERIES. 



Page 



Prof. E. 0. C. Baly on Light Absorption and Fluorescence. — 

 Part III 510 



Mr. G-. H. Livens on the Electron Theory of the Hall Effect 

 and Allied Phenomena 526 



Mr. G. H. Livens on the Electron Theory of Metallic Con- 

 duction.— Y 549 



Dr. F. A. Lindemann on the Eelation between the Life of 

 Radioactive Substances and the Range of the Rays emitted. 560 



Mr. H. G-. Savidge and Prof. J. W. Nicholson on the Calcu- 

 lation of Series in Spectra 563 



Mr. C. E. Weatherburn : Problems in Electrostatics and the 

 Steady Flow of Electricity under the exponential potential 

 e-*r/r ' 568 



Dr. N. Bohr on the Decrease of Velocity of Swiftly Moving 

 Electrified Particles in passing through Matter 581 



Dr. A. C. Crehore on Construction of Compound Molecules 

 with Theoretical Atoms, especially the Systems of Growth 

 of the Organic Compounds of Carbon and Hydrogen. 

 (Plates VIII.-XII.) 613 



Prof. 0. Steels on a Simple Resonance Experiment . ... = .. 623 



Mr. W. F. Rawlinson on the Decrease in Velocity of 

 /3-particles in passing through Matter 627 



Dr. Allan Ferguson on the Drop- Weight Method for Deter- 

 mining Surface-Tensions 632 



Dr. A. M. Tvndall on the Critical Field at a Discharging 

 Point . . . /. 637 



Mr. G-. Shearer on the Ionization of Hydrogen by X-Rays . . 644 



Prof. J. W. Nicholson on Mutual Electromagnetic Mass .... 659 



Mr. J. Morau : A Comparison of Radium Standard Solutions. 660 



NUMBER CLXXIX.— NOVEMBER. 



Mr, N. P. McCleland on the Electron Theory in Organic 

 Chemistry ®6z 



Prof. J. C. McLennan and Mr. H. V. Mercer on the Ionization 

 Tracks of Alpha Rays in Hydrogen. (Plate XIII.) 676 



Prof. J. C. McLennan and Mr. R. C. Dearie on the Infra-red 

 Emission Spectrum of the Mercury Arc. (Plates XIV. 

 & XV.) 683 



Prof. J. C. McLennan and Mr. Evan Edwards on the Absorp- 

 tion Spectra of Mercury, Cadmium, and Zinc Vapours. 

 (Plate XVI.) • 695 



Prof. C. V. Raman on Intermittent Vision 701 



Mr. A. B. Wood on the Velocities of the a Particles from 

 Thorium Active Deposit. (Plate XVII.) 702 



Dr. J. R. Ashworth on the Application of Van der Waals' 

 Equation of State to Magnetism 711 



