﻿INDEX. 



615 



Radiothoriuin, on some properties of 

 the a rays of, 82. 



Radium, on the effect of, in facili- 

 tating the electric discharge in 

 vacuo, 70 ; on the retardation of 

 the a particle from, in passing 

 through matter, 134 ; on the 

 amount of, in the earth, 194; on 

 the mass and velocity of the a 

 particles expelled from, 348. 



A, B, and C, on the periods of 



transformation of, 73. 



Raman (C. V.) on unsymmetrical 

 diffraction-bands due to a rect- 

 angular aperture, 494. 



Ramsay (Sir W.) on chemical and 

 electrical changes induced by ultra- 

 violet light, 397. 



Rayleigh (Lord) on the experimental 

 determination of the ratio of the 

 electrical units, 97 ; on the inter- 

 ference-rings, described by Hai- 

 dinger, observable by means of 

 plates whose surfaces are abso- 

 lutely parallel, 489. 



Russell (A.) on the dead points of a 

 galvanometer-needle for transient 

 currents, 202. 



Rutherford (Prof. E.) on the retar- 

 dation of the a particle from 

 radium in passing through matter, 

 134 ; on the distribution of the 

 intensity of the radiation from 

 radioactive sources, 152 ; on the 

 mass and velocity of the a particles 

 expelled from radium and actinium, 

 348 ; on the mass of the a particles 

 from thorium, 371. 



Schott (Dr. G. A.) on the electron 

 theory of matter and the explan- 

 ation of line spectrum-lines and of 

 gravitation, 21 ; on a kinematical 

 explanation of groups of spectrum- 

 lines with constant frequency-dif- 

 ference. 579. 



Scoble (W. A.) on the strength and 

 behaviour of ductile materials 

 under combined stress, 533. 



Searle (C.) on leakage currents in 

 the moisture condensed on glass 

 surfaces, 336. 



Secohmmeter, on the use of the, for 

 the measurement of combined re- 

 sistances and capacities, 297. 



Shaw (Dr. P. E.) on the disrup- 

 tive voltage of thin liquid films, 

 317. 



Silicic acid, on [double refraction in, 

 produced by electric endosmose, 

 556. 



Skinner (Prof. C. A.) on the evolu- 

 tion of gas from the cathode in 

 helium and argon, 481. 



Smith (G. F. H.) on the determina- 

 tion of the optical constants of a 

 crystal by means of refraction 

 through a prism, 29. 



Smythe (Dr. J. A.) on a case of 

 unconformity and thrust in the 

 coal-measures of Northumberland, 

 170. 



Sodium vapour, on the fluorescence 

 and magnetic rotation spectra of, 

 499. 



Sollas (Prof. W. J.) on recumbent 

 folds produced as a result of flow, 

 175. 



Solutions, on tbe molecular consti- 

 tution of aqueous, 1 ; on the action 

 of electrolytes on colloidal, 472. 



Spectra, on the fluorescence, magnetic 

 rotation, and temperature emission, 

 of iodine vapour, 329: on the 

 fluorescence and magnetic rota- 

 tion, of sodium vapour, 499. 



Spectrum, on the Swan, 581. 



Spectrum-lines, on the explanation 

 of fine, 21 : on a kinematical ex- 

 planation of groups of, with con- 

 stant frequency- difference. 579. 



Spencer (Dr. J. F.) on chemical and 

 electrical changes induced bv ultra- 

 violet light, 397. 



Starkey (W. I. S. B.) on some re- 

 markable results of a discharge of 

 lightning upon an oak-tree, 62. 



Steel, on the effect of combined 

 stresses on the elastic properties 

 of, 418. 



Stresses, on the effect of combined, 

 on the elastic properties of iron 

 and steel, 418. 



Surface-forces, on the theory of, 557. 



Sutherland (W.) on the molecular 

 constitution of aqueous solutions, 

 ]. 



Swan spectrum, on the, 581. 



Swinton (A. A. C.) on the effect of 

 radium in facilitating the visible 

 electric discharge in vacuo, 70. 



Temperature emission spectrum of 

 iodine vapour, on the, 329. 



Thermodynamical theory of radia- 

 tion, on the, 57, 498. 



