IV CONTENTS OF VOL. XL. SIXTH SERIES. 



Page 

 Notices respecting New Books : — 



L. Bairstow's Applied Aerodynamics 16J 



Sir T. Muir's The Theory of Determinants in the 



historical order of development 165 



F. W. Edridge-Green's The Physiology of Vision with 

 special reference to Colour-Blindness, and Card Test 



for Colour-Blindness 16fi 



W. Makower et H. Geiger's Mesures Pratiques en 



Radioactivite 168 



Dr. L. Silberstein's Elements of Vector Algebra 168 



NUMBEB CCXXXVL— AUGUST. 



Prof. W. Lawrence Bragg on the Arrangement of Atoms in 



Crystals. (Plate 11T.) .•••.•. 169 



Messrs. St. Landau and Ed. Steuz on the Dissociation of 



Iodine Vapour and its Fluorescence 189 



Messrs. M. P. Applebey and D. L. Chapman on the Equation 



of State ' 197 



Prof. W. B. Hardy on Static Friction.— II 201 



Prof. A. "W. Porter on the Specific Heat of Samrated 



Vapours and Entropy-Temperature Diagrams of Fluids . . 211 



Dr. Herbert Chatley on Cohesion 213 



Mr. B. Meldrum Stewart on the Adjustment of Observations. 217 

 Prof. A Anderson on a Method of finding the Scalar and 



Vector Potentials due to the Motion of Electric Charges . . 228 

 Messrs. B. W-. James and Norman Tunstall on the Crystalline 



Structure of Antimony 233 



Mr. G. P. Thomson on the Spectrum of Hydrogen Positive 



Bays. (Plate IV.) . .\ ,240 



Proceedings of the Geological Society : — 



Prof. S. James Shand on a Eift- Valley in Western 

 Persia 247 



NUMBEB CCXXXVIL— SEPTEMBER 



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

 to the Movement of Gas-Molecules 249 



Prof. J. C. McLennan and Mr. W. "W.. Shaver on the 

 Permeability of Thin Fabrics and Films to Hydrogen 

 and Helium . ._ 272 



Sub-Lieut. A. L. Williams on the Electrical Conductivity 

 of Copper fused with Mica. (With Introduction by 

 Prof. J. C. McLennan.) (Plates V.-VII.) 281 



