CONTENTS OF VOL. XXXIV. SIXTH SERIES. 



Prof. E. H. Barton and Miss H. M. Browning on Vibrations 

 under Variable Couplings Quantitatively Elucidated by 

 Simple Experiments. (Plates IV.-VI.) - 246 



Prof. C. G. Barkla and Miss M. P. White on the Absorption 

 and Scattering of X-Rays, and the Characteristic Radiations 

 of J Series 270 



Prof. O. W. Richardson and Lieut. C. B. Bazzoni on the 

 Limiting Frequency in the Spectra of Helium, Hydrogen, 

 and Mercury in the Extreme Ultra- Violet 285 



Miss N. Thomas and Dr. Allan Ferguson on the Evaporation 

 from a Circular Water Surface 308 



Prof. A. Eddington on Astronomical Consequences of the 

 Electrical Theory of Matter. Note on Sir Oliver Lodge's 

 Suggestions, II 321 



Prof. Prank Horton on High Potential Batteries for supplying 

 small currents 327 



Mr. J. Prescott on the Motion of a Spinning Projectile .... 332 



Dr. Eva Bruins on the Application of van der Waals' Equation 

 of State. Remarks on Miss Bruins' Communication by 

 Dr. J. R. Ashworth 380, 381 



Proceedings of the Geological Society : — 



Mr. F. Dixey and Dr. T. F. Sibly on the Carboniferous 

 Limestone Series on the South-Eastern Margin of the 

 South Wales Coalfield 382 



NUMBER CCIIL— NOVEMBER. 



Mr. Gr. H. Livens on the Flux of Energy in the Electro- 

 dynamic Field , 385 



Dr. II. Bateman on some Fundamental Concepts of Electrical 

 Theory 405 



Lord Rayleigh on the Colours diffusely reflected from some 

 Collodion Films spread on Metal Surfaces 423 



Mr. S. Ratner on the Distribution of the Active Deposit 

 of Radium in an Electric Field 429 



Dr. Harold Jeffreys on Periodic Convection Currents in the 

 Atmosphere. (Second Paper.) 449 



The Earl of Berkeley on the Theory of Osmotic Equilibrium. 459 



Proceedings of the Geological Society : — 



Mr. T. Harris Burton on the Microscopic Material of the 

 Bunter Pebble-Beds of Nottinghamshire and its Pro- 

 bable Source of Origin 460 



