CONTENTS OF VOL. XXXT. FIFTH SERIES. V 



NUMBER 0X0.— MAECH. 



Page 

 Prof. J. J. Thomson on the Illustration of the Properties of 

 the Electric Field by Means of Tabes of Electrostatic In- 

 duction 149 



Ernst Lecher on the Measurement of Dielectric Constants by 



means of Hertz Oscillations 172 



Mr. H. Lamb on the Flexure of a Flat Elastic Spring 182 



Mr. E. B. Eosa on the Specific Inductive Capacity of Electro- 

 lytes. (Plate VI.) 188 



Prof. G. M. Minchin's Experiments in Photoelectricity .... 207 

 Mr. M. Carey Lea on Gold-coloured Alio tropic Silver. (Plates 



I.-III.) 238 



Mr. Shelford Bid well's Experiments with Selenium Cells .... 250 

 Mr. A. A. Michelson on the Visibility of Interference-Fringes 



in the Focus of a Telescope 256 



Mr. J. McCowan on the Heating of Conductors by Electric 

 Currents, and on the Electric Distribution in Conductors so 



heated 259 



Mr. A. Schuster on the Influence of the Bending of Magnetic 



Needles on the apparent Magnetic Dip 275 



Mr. T. H. Blakesley on the Solution of a Geometrical Problem 



in Magnetism 281 



Proceedings of the Geological Society : — 



Prof. J. Prestwich on the Age, Formation, and Succes- 

 sive Drift-Stages of the Valley of the Darent 285 



Mr. A. J. Jukes-Brown and Prof. J. B. Harrison on the 



Geology of Barbados and the West Indies . , 287 



Messrs. A. Harker and J. E. Marr on the Shap Granite, 

 and the Associated Igneous and Metamorphic Eocks . . 288 

 Observations on the Paper by Prof. Trowbridge, " Motions of 

 Atoms in the Electrical Discharge," by E. Wiedemann and 



H. Ebert 288 



On Hertz's Electrical Vibrations in Air, by E. Sarasin and 



L. De la Eive * 289 



On the Conduction of Electricity by the Vapours of Heated 



Salts, by Svante Arrhenius 290 



Electrical Waves, by Ernst Lecher 290 



On the Heat of Evaporation of Liquefied Gases, by E. Mathias. 291 

 On the Thermal Expansion of some Amalgams in the Liquid 

 State, by C. Catteneo 292 



NUMBEE CXCL— APEIL. 



E. Sissingh on Kerr's Magneto-optic Phenomenon in the case 

 of Equatorial Magnetization of Iron 293 



