CONTENTS OF VOL. XXXIV, 



(SIXTH SEEIES). 



NUMBEE CXCIX.— JULY 1917. 



Page 

 Prof. E. A. Millikan on a New Determination of e, N, and 



Related Constants 1 



Dr. S. A. Shorter on the Theory of Osmotic Equilibrium . . 31 



The Earl of Berkeley's Note on the above 33 



Mr. E. M. Wellisch on the Motion of Ions and Electrons 



through Gases 33 



Prof. W. M. Thornton on the Nature of Chemical Affinity 



in the Combustion of Organic Compounds 66 



Prof. W. M. Thornton on the Curves of the Periodic I aw . . 70 



Prof. A, Anderson on the Focometry of Lens-Combinations . . 76 



NUMBEE CC— AUGUST. 



Sir Oliver Lodge on Astronomical Consequences of the 

 Electrical Theory of Matter. . . , 81 



Lord Eayleigh on the Pressure developed in a Liquid during 

 the Collapse of a Spherical Cavity 94 



Dr. H. E. Ives on Hue Difference and Flicker Photometer 

 Speed 99 



Mr. Harold Jeffreys on Periodic Convection Currents in the 

 Atmosphere 112 



Prof. C. V. Eaman and Mr. Ashutosh Dey on the Main- 

 tenance of Vibrations by a Periodic Field of Force. 

 (Plate I.) 129 



Prof. G-anesh Prasad on the Failure of Poisson's Equation 

 for certain Volume Distributions . , 138 



