INDEX. 



823 



Ramsey (Prof. R. R.) on the varia- 

 tion of the emanation content of 

 certain springs, 815. 



Rawlinson (W. F.) on the decrease 

 in velocity of beta particles in 

 passing through matter, 627. 



Rayleigh (Lord) on the resistance 

 experienced by small plates ex- 

 posed to a stream of fluid, 179 ; 

 on the stability of the simple 

 shearing motion of a viscous in- 

 compressible fluid, 329. 



Reflexion from a moving mirror, on, 

 282. 



Relativity, on the rotation of elastic 

 bodies and the principle of, 754. 



Resonance experiment, on a simple, 

 623. 



Richardson (H.) on the maximum 

 frequency of the X rays from a 

 Coolidge" tube, 339. 



Richardson (Prof. 0. W.) on metallic 

 conduction, 295. 



Rbntgen rays, on a method of finding 

 the coefficients of absorption of 

 the different constituents of a 

 beam of, 780. 



Rotation of elastic bodies and the 

 principle of relativity, 754. 



Rutherford (Sir E.) ou the maximum 

 frequency of the X rays from a 

 Coolidg-e tube, 339 ; on the effi- 

 ciency of production of X rays 

 from a Coolidge tube, 361. 



Savidge (II. (i.) on the calculation 

 of series in spectra, 563. 



Shearer (G.) on the ionization of 

 hydrogen by X rays, 644 ; on the 

 velocity of electrons expelled by 

 X rays, 745. 



Shearing motion of a viscous incom- 

 pressible fluid, on the stability of 

 the simple, 329. 



Shelton (H. S.) on the radioactive 

 methods of determining: geological 

 time, 448. 



Silberstein (Dr. L.) on radiation 

 from an electric source, 163, 784; 

 on mutual electromagnetic mass, 

 370. 



Silicon, on the ultraviolet spectrum 

 of elementary, 482. 



Simpson (Dr. C. F.) on the electricity 

 of atmospheric precipitation, 1. 



Smart (E. II.) on the third-order 

 aberrations of a symmetrical op- 

 tical instrument, 270. 



Smith (H.) on a comparison of the 

 positive rays with the spectrum of 

 the positive column in a mixture 

 of helium aud hydrogen, 805. 



Soddy (Prof. F.) on the life-period 

 of ionium, 209. 



Solids, on the effect of electric and 

 magnetic fields on the emission 

 lines of, 316. 



Spectra, on the arc and spark, of 

 nickel, 385; on the calculation of 

 series in, 563, 734 ; on the absorp- 

 tion, of mercury, cadmium, and 

 zinc vapours, 695 ; on radiation 

 from an electric source and line-, 

 784. 



Spectrum, on the high-frequency, of 

 tungsten, 368 ; on the infra-red 

 emission, of the mercury arc, 683 ; 

 on the dispersion of carbon di- 

 oxide in the infra-red region of 

 the, 737. 



lines, on the influence of tem- 

 perature and density gradients 

 upon the displacements of, 385. 



Spinel group of crystals, on the 

 structure of the, 305. 



Springs, on the variation of the 

 emanation content of certain, 

 815. 



Statescu (Dr. C.) on the dispersion 

 of carbon dioxide in the infra-red 

 region of the spectrum, 737. 



Steels (Prof. O.) on a simple reso- 

 nance experiment, <;:?•"!. 



Surface-tensions, on the drop-weight 

 method for determining, 6?t2. 



Szmidt (Miss J.) on the excitation 

 of gamma rays by beta rays, 220. 



Temperatures, on the estimation of 

 high, bv the method of colour 

 identity," 34. 



Tesla coils, on the most effective 

 primary capacity for, 224. 



Thermodynamic state-equation, on 

 the theory of corresponding states 

 and the, 146. 



Thomson (Sir J. J.) on the con- 

 duction of electricity through 

 metals, 192 ; on the mobility of 

 negative ions at low pressures, 

 321 ; on a method of finding the 

 coefficients of absorption of the 

 different constituents of a beam 

 of Rbntgen rays, or the periods 

 and coefficients of damping of a 

 vibrating dynamical system, 780. 



