CONTENTS OF VOL. XXXIX. SIXTH SERIES. 



Page 

 Mr. J. S. G. Thomas on the Hot-wire Anemometer : its Appli-* 

 cation to the Investigation of the Velocity of (rases in Pipes. 



(Plates X.-XIII.) 505 



Prof. C. V. Raman on a Mechanical Violin-Player for Acous- 

 tical Experiments. (Plate XIV.) 535 



Mr. C. Gr. Darwin on the Dynamical Motions of Charged 



Particles 537 



Major "W". T. David on the Specific Heat of Carbon Dioxide 



and Steam 551 



Mr. lolo Jones on the Period and Decrement of an Oscillatory 



Electrical Circuit provided with a Short-circuited Secondary. 553 

 Prof. E. C. C. Baly on Light Absorption and Fluorescence. — V. 

 The so-called Molecular Rotational Frequencies of Water. 565 



Dr. Harold Jeffreys on Turbulence in the Ocean 578 



Prof. A. O. Rankine and Dr. L. Silberstein on Propagation 



of Light in a Gravitational Field 586 



Prof. F. Horton and Miss A. C. Davies on Critical Velocities 



for Electrons in Helium . . . 592 



Prof. H. S. Carslaw on Bromwich's Method of solving Pro- 

 blems in the Conduction of Heat 603 



Dr. F. "W. Aston on the Mass-Spectra of Chemical Elements. 



(Plate XV.) 611 



Prof. A. Anderson on the Advance of the Perihelion of a 

 Planet, and the Path of a Ray of Light in the Gravitation 



Field of the Sun 626 



Notices respecting New Books : — 



Dr. A. N. Whitehead's An Enquiry concerning the Prin- 

 ciples of Natural Knowledge 629 



Sir Napier Shaw's Manual of Meteorology. Part IV. 

 The Relation of the Wind to the Distribution of 



Barometric Pressure 631 



Prof. A. W. Stewart's Stereochemistry 632 



NUMBER CCXXXIV.— JUNE. 



Sir J. A. Ewing on the Specific Heat of Saturated Vapour and 



the Entropy-Temperature Diagrams of certain Fluids .... 633 

 Prof. W. L. Bragg on the Crystalline Structure of Zinc Oxide. 647 



Dr. Gr. Green on a Fluid Analogue for the iEther 651 



Dr. A. H. Compton on Radioactivity and the Gravitational 



Field ;.-•• 659 



Mr. R. Hargreaves on the Difference between Magnetic aDd 



Electric Energies as a Pressure 662 



Mr. W. G. Bickley on the Diffraction of Waves by a Semi- 

 infinite Screen with a Straight Edge 668 



