VI CONTENTS OF VOL. XXXVII. SIXTH SERIES. 



Page 

 Prof. R. W. Wood and Dr. F. L. Mohler on Resonance 

 Radiation of Sodium Vapour excited by One of the D 



Lines 456 



Notices respecting New Books : — 



Dr. C. E. Cullis's Matrices and Determinoids, Vol. II. 461 

 Proceedings of the Geological Society : — 



Sir Douglas Mawson on the Autarctic Ice-Cap and its 

 Borders 102 



NUMBER CCXXL— MAY. 



Sir Oliver Lodge on a possible means of determining the two 



characteristic Constants of the JEther of Space 465 



Prof. A. Gray on a reciprocal relation between the Electro- 

 static Eields of certain Distributions of Electricity and the 

 Magnetic Eields of corresponding Uniform Currents .... 472 

 Dr. Norman Campbell on the "Break''* of a Magneto or 



Induction-Coil 481 



Mr. Harbord George Way ling on Latent Heats of Eusion 



and their relation to Molecular Composition 495 



Lord Eayleigh on the Resultant of a Number of Unit Vi- 

 brations, whose Phases are at Random over a Range not 



limited to an Integral Number of Periods . . . . : 498 



Mr. S. Lees on the Whirling of an Excentrically-loaded 



Overhung Shaft 515 



Dr. F. A. Lindemann and Dr. E. W. Aston on the Possibility 



of separating Isotopes 523 



Notices respecting New Books : — 



C. V. Raman's Mechanical Theory of the Vibrations of 

 Bowed Strings and of Musical Instruments of the 

 Violin Family, with Experimental Verification of 



the Results : Part 1 535 



Intelligence and Miscellaneous Articles : — 



Dr. Lindemann's Construction for Rectifying any Arc 

 of a Circle, by F. J. W. Whipple 536 



