IV CONTENTS OF VOL. XLIJI. SIXTH SERIES. 



Page 



Notices respecting New Books : — 



Messrs. G. W. C. Kaye and T. H. Laby's Tables of Physical 



and Chemical Constants 237 



Prof. H. S. Carslaw's Introduction to the Theory of Fourier 



Series and Integrals 238 



Dr. S. Brodetsky's The Mechanical Principles of the Aeroplane . 240 

 Prof. D. N. Mallik's Optical Theories 240 



NUMBER CCLIV.— FEBRUARY. 



Prof. F. Y. Edgeworth on the Application of Probabilities to the 

 Movement of Gas-Molecules 241 



Mr. A. S. Percival : Method of Tracing Caustic Curves 258 



Dr. J. S. G. Thomas on the Forced Convection of Heat from a Pair 

 of hue heated Wires 277 



Mr. G. A. Hemsalech and the Comte de Gramont : Observations 

 and Experiments on the Occurrence of Spark Lines (Enhanced 

 Lines) in the Arc— Part I. Lead and Tin. (Plates III. V.) 287 



Mr. S. I. V r avilov on the Dependence of the Intensity of the Fluores- 

 cence of Dyes upon the Wave-length of the Exciting Light .... 307 



Prof. W. B. Morton and Mr. L. J. Close on Hertz's Theory of the 

 Contact of Elastic Bodies 320 



Mr. A. H. Davis on Natural Convective Cooling of Wires 329 



Mr. L. St. C. Broughall on the Frequency of the Electrons in the 

 Neon Atom 339 



Dr. J. H. J. Poole on an Attempt to determine whether a Minimum 

 Time is necessary to excite the Human Retina 345 



Mr. II. E. Roaf on the Analysis of Sound Waves by the Cochlea. . 349 



Mr. Frank M. Lidstone on the Measurement of Absolute Viscosity . 354 



Prof. C. V. Raman on the Phenomenon of the " Radiant Spectrum " 

 observed by Sir David Brewster -J- 357 



Prof. E. Taylor Jones, Mr. J. D. Morgan, and Prof. R. V. Wheeler 

 on the Form of the Temperature Wave spreading by Conduction 

 from Point and Spherical Sources ; with a suggested application 

 to the Problem of Spark Ignition 359 



Prof. J. R. Partington and Mr. II. J. Cant on the Specific Heats of 

 Ammonia, Sulphur dioxide, and Carbon dioxide 369 



Mr. P. W. Burbidge on the Absorption of the K X-rays of Silver 

 in Gases and Gaseous Mixtures . , 381 



Mr. P. W. Burbidge on the Absorption of Narrow X-ray Beams . . 389 



Dr. J. L. Glasson on Beta Rays and Atomic Number 393 



Prof. H. J. Priestley : Reply to Sir Oliver Lodge's paper on the 

 Einstein Spectral Shift „ 396 



Dr. Norman R. Campbell : The Fundamental Principles of Scien- 

 tific Inquiry , 397 



Drs. D. M. Wrinch and Harold Jeffreys's Reply to the above note. . 398 



Notices respecting New Books : — 



Dr. A. E. M. Geddes's Meteorology : an Introductory Treatise . 398 

 Mr. E. Cunningham's Relativity, the Electron Theory, and 



Gravitation 399 



M. E. M. Ltmieray's Lecons Elementaires sur la Gravitation 



d'apres la Theorie d'Einstein 399 



Dr. J. Johnstone's The Mechanism of Life . . 399 



Prof. 0. W. Richardson's The Emission of Electricity from 



Hot Bodies 400 



Bibliotheca Ohemico-Mathematica 400 



