1026 



INDEX. 



Bjornstahl (Y.) on magnetic double 



refraction of gold colloids, 352. 

 Books, new: — Von Kohr's the For- 

 mation of Images by Optical 



Instruments, 600. 

 Bosanquet (0. H.) on the reflexion 



of X-rays by rock-salt, 1 ; on the 



angle of contact, 456. 

 Bragg (Prof. W. L.) on the reflexion 



of X-rays by rock-salt, 1. 

 Brass, on the viscosity of, 115. 

 Briggs (Dr. S. H. 0.) on the elements 



as compounds of the first order, 



448. 

 Bromwich (Dr. T. J. Fa.) on units 



and the theory of relativity, 431 ; 



on the problem of raadom flights, 



432. 

 Browning (Miss H. M.) on triple 



pendulums with mutual inter- 

 action, 17. 

 Buckingham (E.) on the method of 



dimensions, 696. 

 Caesium, on the mass spectra of, 



436. 

 Calcium, on the isotopes of, 862. 

 Carbon, on the soft X-rays from, 



1017. 

 monoxide, on an apparatus for 



preparing small quantities of pure, 



246. 

 Celluloid, on the electrical conduc- 

 tivity of, 500. 

 Chad wick (Dr. J.) on the artificial 



disintegration of light elements, 



809 ; on the collisions of alpha 



particles with hydrogen nuclei, 



923. 

 Ohatley (Dr. H.) on latent heat and 



surface energy, 183. 

 Chemical elements, on the mass 



spectra of, 140 ; on the, regarded 



as compounds of the first order, 



448. 



force, on the nature of, 134. 



Chlorine, on the mass spectra of, 142. 

 Chromogenetic properties of sulphur 



and other elements, on the, 259. 

 Coal-gas and air, on the explosion 



of, 868. 

 Cohesion, on, 183. 

 Colloids, on the magnetic double 



refraction of gold, 352. 

 Colours of mixed plates, on the, 679, 

 Combustion, on intra-molecular 



energy during, 868. 

 Contact, on the angle of, 456. 



Convection coefficient in a dispersive 

 medium, on the, 509. 



■ currents from heated platinum 



wires, on the mutual action of 

 the, 940. 



Copper, on the variation of the rigi- 

 dity of ; with temperature, 407. 



Corbino effect in iron, on the, 677. 



Cornu's method of determining the 

 elastic constants of glass, on, 551. 



Cosmic rays, 1019. 



Crehore (Dr. A. C.) on an atomic 

 model based upon electromagnetic 

 theory, 569. 



Crowther (Dr. J. A.) on J radiation, 

 719. 



Crystal structure of the silver halides, 

 on the, 262. 



Crystalline medium, on the vibra- 

 tions of a, 148. 



Cuthbertson (C.) on the mental 

 multiplication of large numbers, 

 872. 



Cyanogen, on the viscosity and mole- 

 cular dimensions of, 615. 



Cylinders, on the diffraction of light 

 by, 669. 



Dadourian (Dr. H. M.) on the tem- 

 perature coefficient of the modulus 

 of rigidity of steel, 442. 



Datta (G. L.) on Quetelet's rings, 

 826. 



Datta (S.) on the variation of the 

 resistance of selenium with tem- 

 perature, 463. 



David (Prof. W. T.) on intra-mole- 

 cular energy during combustion. 

 868. 



Davies (Miss A. C.) on radiation and 

 ionization by electron bombard- 

 ment in helium, 746. 



Davis (Dr. O. C. M.) on the chromo- 

 genetic properties of sulphur, 259. 



Dielectrics, on the electrical conduc- 

 tivity of some, 488. 



Diffraction, on the scattering of rays 

 in X-ray, 302. 



of light by cylinders and spheres, 



on the, 669. 



phenomena, on some, 826. 



Dimensions, on the method of, 696. 



Discharge tube, on the presence of 

 neutrons in a, 596. 



Dispersion of light bv potassium 

 vapour, on the, 289. 



Dispersive medium, on the convec- 

 tion coefficient in a. 509. 



