IV CONTENTS OF VOL. XVII. SIXTH SERIES. 



NUMBEB XCVIIL— FEBEUAEY. 



Page 

 Prof. J. H. Jeans on Temperature-Radiation and the Partition 



of Energy in Continuous Media 229 



Dr. J. W. Nicholson on the Inductance of Two Parallel 



Wires 255 



Dr. E. A. Lehfeldt on the Treatment of Electrodynamics . . 275 

 Prof. E. Eutherford and Mr. T. Eoyds on the Nature of the 



a Particle from Eadioactive Substances 281 



Prof. J. A. Eleming on the Photoelectric Properties of 



Potassium-Sodium Alloy 286 



Mr. C. S. Wright on Variations in the Conductivity of Air 



enclosed in Metallic Eeceivers. (Plates IV. & V.) 295 



Prof. E. W. Wood : Note on the Theory of the Greenhouse. 319 



Mr. W. Sutherland : Molecular Diameters 320 



Mr. W. Wilson on the Eadioactive Products present in the 



Atmosphere 321 



Dr. E. A. Houstoun on the Transverse Oscillations of a Canal 



of Circular Section 325 



Dr. C. Chree on the Coefficients in certain Series of Bessel's 



Punctions 329 



Notices respecting New Books : — 



Prof. A. M. Worthington's Study of Splashes 331 



Proceedings of the Geological Society : — 



Mr. E. Dixon Oldham on the Geological Interpretation 

 of the Earth-Movements associated with the Califor- 

 nian Earthquake of April 18th, 1906 332 



NUMBEE XCIX.— MAECH. 



Dr. G. Bakker on the Theory of Surface Eorces. — IV. On 

 very thin Liquid Films and very small Liquid Drops .... 333 



Mr. I'. C. Brown on the Kinetic Energy of the Positive Ions 

 emitted by Hot Platinum 355 



Prof. J. A. Pollock on the Electron Theory of the Carbon 

 Arc , " 361 



Prof. J. A. Pollock and Mr. A. B. B. Eanclaud on the Dis- 

 charge of Electricity from Glowing Carbon. (Plate VI.) . . 366 



Mr. E. W. Boyle on the Absorption of the Eadioactive 

 Emanations by Charcoal. (Plate VII.) 374 



Mr. A. H. Gibson : An Investigation of the Eesistance to the 

 Flow of Air through a Pipe, with the Deduction and 

 Verification of a Eational Formula 389 



Dr. C. V. Drysdale on the LTse of the Potentiometer on Alter- 

 nate Current Circuits 402 



