IV CONTENTS OF VOL. VI. — SIXTH SERIES. 



Page 

 Notices respecting New Books : — 



iDterDatioDal Catalogue of Scientific Literature 192 



Subject List of Works on General Science, Physics, Sound, 

 Music, Light, «&;c. in the Library of the Patent Oflice. 192 



NUMBEE XXXIL— AUGUST. 



Dr. L. N. G. rilon on a New Mode of Expressing Solutions 

 of Laplace's Equation, in Terms of Operators involving 

 Bessel Functions I93 



Mr. W. B. Cartmel on the Anomalous Dispersion and Selective 

 Absorption of Fuchsin. (Plates IX. & X.) 213 



Prof. J. D. Everett on the Mathematics of Bees' Cells 228 



Prof. J. Patterson on the Ionization in Air at different Tem- 

 peratures and Pressures 231 



Mr G. W.Walker on the Theory of the Quadrant Electrometer. 238 



Hon. E;. J. Strutt on Fluorescence of Crystals under the 

 Eontgen Eays 250 



Mr. S. H. Burbury on the Variation of Entropy as treated in 

 Willard Gibbs' ' Statistical Mechanics ' 251 



Prof. E. W. Wood on the Electrical Eesonance of Metal 

 Particles for Light- Waves 259 



Dr. H. A. Wilson on the Ionization produced by Hot Platinum 

 in Air 267 



Mr. T. H. Blakesley on a Direct- Vision Spectroscope of one 

 kind of Glass 268 



Dr. \. H. Veley on Initial Acceleration in Chemical Change. 271 



Mr. J. H. Jeans on the Vibrations set up in Molecules by 

 Collisions 279 



Notices respecting New Books :— 



Prof. A. Kundt's Vorlesuugen uber Experimental physik . . 287 

 Mr. W. C. D. Whetham's Treatise on the Theory of 



Solution 287 



Hermann von Helmholtz, by Leo Xoenigsberger 288 



NUMBEE XXXIIL— SEPTEMBEE. 



Lord Eayleigh on the Production and Distribution of Sound. 289 

 Mr. G. Owen on the Condensation Nuclei produced in Air 



and Hydrogen by heating a Platinum Wire. (Plate XL) 306 

 Dr. S. E. Milner on an Automatic Mercury Vacuum-pump. 



(Plate XII.) 316 



Mr. P. E. B. Jourdain on a General Theorem on the Transfinite 



Cardinal Numbers of Aggregates of Functions 323 



Mr. E. F. Muirhead on the Axial Dioptric System 326 



Messrs. J. C. McLennan and E. F. Burton on the Eadioactivity 



of Metals generally '. 843 



