IV CONTENTS OF VOL. I. SIXTH SERIES. 



NUMBER II.— FEBRUARY. 



Page 

 Lord Bayleigh on the Stresses in Solid Bodies due to Unequal 



Heating, and on the Double Refraction resulting therefrom 169 

 Dr. G. Pierce on Indices of Refraction for Electric Waves, 



Measured by a Modified Radio-Micrometer 179 



Prof. J. S. Townsend on the Conductivity produced in Gases 



by the Motion of Negatively charged Ions 198 



Prof. A. Schuster on Electric Inertia and the Inertia of 



Electric Convection 227 



Mr. R. J. Sowter on Astigmatic Lenses 239 



Mr. T. Mizuno on the Function of Self-induction in 



Wehnelt's Interruptor 246 



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



Discharge through a Gas 250 



Notices respecting New Books : — 



Sir R. S. Ball's Treatise on the Theory of Screws 260 



NUMBER III.— MARCH. 



Dr. P. E. Shaw : an Investigation of the Simple Coherer . . 265 

 Dr. S. W. Richardson and Mr. S. C. Laws on some Interest- 

 ing Changes in the Magnetic Condition of an Alloy of 

 nearly Pure Iron and Aluminium (2-42 %) cuie *° succes- 

 sive Heatings and Coolings 296 



Lord Rayleigh on a Problem relating to the Propagation of 



Sound between Parallel Walls 301 



Hon. R. J. Strutt on the Tendency of the Atomic Weights to 



approximate to Whole Numbers 311 



Prof. A. Schuster on Magnetic Precession 314 



Dr. H. C. Pocklington on the Fundamental Equations of 



Electrodynamics and Cremieu's Experiment 325 



Mr. J. Buchanan on the Theory of Magnetic Induction in 



Iron and other Metals 330 



Mr. J. B. B. Burke on the Phosphorescent Glow in Gases . . 342 

 Dr. P. Sacerdote's Note on the subject of a Paper by Prof. 

 L. T. More : " On the supposed Elongation of a Dielectric 



in an Electrostatic Field " 357 



On Hydrometers of Total Immersion, by A. W. Warrington. 360 

 Obituarv Notice : Prof. G. F. FitzGerald 360 



