IT CONTENTS OF VOL. IX. SIXTH SERIES. 



NUMBER L.— FEBRUARY. 



Page 

 Prof. J. A. Cunningham on the Cathode Eall from Hot 



Carbon 193 



Prof. E. Buckingham on Certain Difficulties which are Encoun- 

 tered in the Study of Thermodynamics 208 



Prof. L. Kahlenberg on Recent Investigations bearing on the 



Theory of Electrolytic Dissociation ..... 214 



Prof. J. A. McClelland on Secondary Radiation 230 



Mr. S. H. Burbury on the Theory of Electric Inertia 243 



Dr. J. Buchanan and Mr. H. \V. Malcolm on Experiments 



with Rotating Viscous Liquids. (Plate IV.) 251 



Dr. C. H. Lees and Mr. R. E. Grime on a Compact Apparatus 



for Determining Young's Modulus for Thin Wires 258 



Mr. J. W. Nicholson on the Application of Legendre's 



Functions to the Theory of the Jacobiau Elliptic Integrals. 261 

 Notices respecting New Books : — 



Dr. H. "W. B. Roozeboom's Die Heterogeuen Gleich- 



gewichte vom Staudpunkte der Phasenlehre 285 



Proceedings of the Geological Society : — 



Rev. E. C. Spicer on Sarsen-Stones in a Clay Pit 286 



Dr. D. Woolacott on the Superficial Deposits and pre- 

 Glacial Valleys of the Northumberland and Durham 



Coalfield. . 286 



Prof. E. W. Skeats on the Chemical and Mineralogical 



Evidence as to the Origin of the Dolomites of 

 Southern Tvrol 28 



NUMBER LI.— MARCH. 



Prof. J. S. Townsend on a Theory of the Variation of the 

 Potential required to maintain a Current in a Gas 289 



Mr. W. Duddell on a High-Frequency Alternator. (Plates 

 V. & VI.) 299 



Capt. E. Henderson on Alternators in Parallel 309 



Mr. R. Hargreaves on Radiation and ElectromagneticTbeory. 313 



Prof. J. Sebelien on the Distribution of the Actinic Sunlight 

 on the Northern Hemisphere at Summer Solstice 351 



Dr. W. E. Adeney on Unrecognized Factors in the Trans- 

 mission of Gases through Water 360 



Dr. R. S. Willows on the Action of a Magnetic Field on 

 the Discharge through a Gas 370 



Dr. R. S. Willows and Mr. J. Peck on the Action of Radium 

 on the Electric Spark 378 



Notices respecting New Books : — 



Prof. A. Schuster's Introduction to the Theory of Optics 385 

 Prof. H. Moissan's The Electric Furnace 385 



