CONTENTS OF VOL. XXXIII. SIXTH SERIES. 



NUMBER CXCVL— APEIL. 



Mr. J. Frenkel on the Surface Electric Double-Layer of 

 Solid and Liquid Bodies , 297 



Prof. E. Taylor Jones on the Secondary Potential of an 

 Induction-Coil at " make." (Plate VII.) 322 



Dr. J. R. Ash worth on Magnetic Hysteresis treated according 

 to Van der Waals's Equation nnd the Kinetic Theory .... 334 



Prof. C. V. Raman and Mr. Ashutosh Dey on Discontinuous 

 Wave-Motion.— Part III. (Plate VIII.) 352 



Mr. R. E. Baynes on Prof. Anderson's " Eocometry of Lens- 

 Combinations " 357 



Mr. L. Kolowrat on an Automatic Device for charging 

 Electroscopes 358 



Dr. H. E. Ives on a Polarization Flicker Photometer and some 

 Data of Theoretical Bearing obtained with it 360 



Notices respecting New Books : — 



Annuaire pour Tan 1917 publie par le Bureau des 

 Longitudes 380 



NUMBER CXCVIL— MAY. 



Lord Rayleigh on Periodic Irrotational Waves at the Surface 

 of Deep Water 381 



Dr. S. D. Wicksell on the Application of Solid Hypergeo- 

 metrical Series to Frequency Distributions in Space 389 



Dr. L. Vegard on Results of Crystal Analysis. — IV. 

 (Plate IX.) '. 395 



Dr. Frank Tinker on Osmotic Pressure : its Relation to the 

 Membrane, the Solvent, and the Solute 428 



Mr. H. W. L. Absalom : Studies of the Ultra-violet Trans- 

 parency of Certain Coloured Media 450 



Proceedings of the Geological Society : — 



Mr. Scoresby Routledge, Account of Easter Island .... 455 



NUMBER CXC VIII.— JUNE. 



Mr. F. J. W. Whipple on the Motion of a Particle on the 



Surface of a Smooth Rotating Globe 457 



Dr. Tycho E:son Auren on the Absorption of X-Rays 471 



Dr. H. Arctowski on Normal Anomalies of the Mean 

 Annual Temperature Variation 487 



