CONTENTS OF VOL. XXIV. SIXTH SERIES. Vll 



Page 

 Dr. J. W. Nicholson on the Bending of Electric Waves round 



a Large Sphere. — V 755 



Mr. H. Pealing on the Distribution and Quality of the Secon- 

 dary Rontgen Radiation from Carbon 765 



Dr. Norman Campbell : Delta Rays produced by Beta Rays . 783 

 Mr. Allan Ferguson on the Construction and Constants of a 



Rectangular Galvanometer . , 788 



Prof. A. Righi on Magnetic Rays in Different Gases 804 



Dr. E. N. da C. Andrade : Behaviour of Metallic Vapours in 



Flames , 809 



Notices respecting New Books : — 



Ferguson's Percentage Unit of Angular Measurement, 



with Logarithms 81 



Proceedings of the Geological Society 810-81 1 



Intelligence and Miscellaneous Articles : — 



Some Applications of the Electron Theory of Matter : 

 Corrections, by Prof. O. W. Richardson 812 



NUMBER CXLIV.— DECEMBER. 



Mr. C. W. Heaps on the Effect of Magnetic Eields on 

 Resistance.— 11. (Plate XXIII.) 813 



Prof. J. W. Nicholson on Uniform Rotation, the Principle of 

 Relativity, and the Michelson-Morley Experiment 820 



Prof. C. Barus : The Indices of Double-refracting Crystals, 

 Determined by Displacement Inter] erometry 827 



Mr. Allan Ferguson on the Shape of the Capillary Surface 

 formed by the External Contact of a Liquid with a Cylinder 

 of Large Radius 837 



Mr. Herbert E. Ives : Studies in the Photometry of Lights of 

 Different Colours. — IV. The Addition of Luminosities of 

 Different Colour 845 



Mr. Herbert E, Ives : Studies in the Photometry of Lights 

 of Different Colours. — V. The Spectral Luminosity Curve 

 of the Average Eye 853 



Lord Ravleigh : Remarks concerning Fourier's Theorem as 

 applied to Physical Problems 864 



Mr. 8. D. Wicksell on the Gas-equation 869 



Dr. R. D. Kleeman on the Effect of the Transition Layer of a 

 Liquid on its Surface Tension 876 



Mr. I. Williams : A Determination of Poisson's Ratio 886 



Dr. R. S. Willows on the Photo-electric Effect of some Com- 

 pounds 891 



Mr. Frederick Soddy on Secondary y rays excited by the 

 /3 rays of Radium 892 



Prof. E. Rutherford on the Energy of the Groups of (3 rays 

 from Radium , 893 



