IV CONTENTS OF VOL. II. SIXTH SERIES. 



NUMBER VIII.— AUGUST. 



Page 



Lord Kelvin on Ether and Gravitational Matter through 

 Infinite Space 161 



Mr. R. Appleyard on a Direct-reading Conductivity-Bridge. . 178 



Mr. H. Pender on the Magnetic Effect of Electrical Convec- 

 tion 179 



Mr. J. Rose-Innes and Dr. 8. Young on the Thermal Pro- 

 perties of Isopentane compared with those of Normal 

 Pentane. (Plate IV.) 208 



Prof. E. Rutherford on Dependence of the Current through 

 Conducting Gases on the Direction of the Electric Field . . 210 



Dr. J. A. Fleming aud Mr. A. W. Ashton on a Model which 

 Imitates the Behaviour of Dielectrics. (Plate V.) 228 



Mr. A. W. Ashton on the Electrification of Dielectrics by 

 Mechanical Means 233 



Dr. V. Cremieu's Reply to Mr. H. A. Wilson's Article 

 entitled " On the Magnetic Effect of Electric Convection, 

 and on Rowland's and Cremieu's Experiments " 235 



Mr. T. J. PA. Bromwich on the Potential of a Symmetrical 

 System 237 



Dr. Oliver Lodge on Gas Theory, &c 241 



Notices respecting New Books : — 



Prof. Osborne Reynolds's Papers on Mechanical and 



Physical Subjects 241 



Prof. H. Poincare's Electricite et Optique 243 



Dr. 11. Bdrnstein's Leitfaden der AVetterkunde , 244 



NUMBER IX.— SEPTEMBER. 



Mr. \V. Sutherland on the Cause of the Structure of Spectra. 245 



Mr. N . "A. Kent on the Zeeman Effect 275 



Lord Rayleigh's Acoustical Notes. — VI 280 



Mr. E. P. Adams on the Electromagnetic Effects of Moving 



Charged Spheres 285 



Mr. G. C. Simpson on the Electrical Resistance of Bismuth 



to Alternating Currents in a Strong Magnetic Eield 300 



Dr. S. Guggenheimer on the Spark-discharge 311 



Dr. A. Pfl tiger on the Anomalous Dispersion of Cyanin .... 317 

 Dr. H. A. Wilson on the Magnetic Effect of Electric Con- 

 vection 319 



Notices respecting New Books : — 



MM. Ch.-fid. Guillaume et L. Poincare : Rapports pre- 

 sented au Congres International de Physique, 1900 . . 320 



