CONTENTS OF VOL. XXXVII. SIXTH SERIES. V 



NUMBER CCX1X.— MAECH. 



Page 

 Prof. L. Vegard on the X-Ray Spectra and the Constitution 



of the Atom. — II 237 



Prof. W. B. Morton on the Motion of a simple Pendulum 



after the String has become slack 280 



Dr. Norman Campbell : Experiments on the High-Tension 



Magneto. — 1 284 



Mr. Clifford C. Paterson and Dr. Norman Campbell on the 



Measurement of the Peak Potential of an Alternating 



Source 301 



Prof. H. H. Jeffcott on the Lateral Vibration of Loaded 



Shafts in the Neighbourhood of a Whirling Speed. — The 



Effect of Want of Balance 304 



Sir Oliver Lodge on iEther and Motion 315 



Notices respecting New Books : — 



Prof. E. C. Tolm an's The Theory of the Relativity of 



Motion 316 



George Carey Poster 317 



NUMBEE CCXX.— APRIL. 



Lord Eayleigh on the Problem of Eandom Vibrations, and of 



Random. Fights in one, two, or three Dimensions 321 



Mr. Megh Nad Saha on the Fundamental Law of Electrical 



Action 347 



Dr. Norman Campbell: Experiments on the High-Tension 



Magneto. — If 372 



Dr. L. Silberstein on the Dispersion of Diamond 396 



Dr. T. J. l'a. Bromwich : Examples of Operational Methods 



in Mathematical Physics 407 



Sir J. J. Thomson on the Origin of Spectra and Planck's Law 419 

 Prof. S. D. Wicksell : A General Formula for the Moments of 



the Normal Correlation Function of any Number of Variates 446 

 Prof. E. H. Barton and Miss H. M. Browning : Mechanical 



" Resonators " under Double Forcing. (Plates V, & VI.). . -153 



