1032 



INDEX. 



Thorium C, on the alpha particles 

 from, 538 ; on the relation between 

 the alpha- and gamma-ray activi- 

 ties of, 903. 



Thornton (D. L.) on the Einstein 

 spectral line effect, 264. 



Tilley (C. E.) on the granite-gneisses 

 cf Southern Eyre peninsula, 199. 



Tin, on the mass spectra of, 141. 



Tomkins (J. A.) on the direct deter- 

 mination of the powers of lenses, 

 144. 



Townsend (Prof. J. S.) on electric 

 oscillations in straight wires and 

 solenoids, 265 ; on the motion of 

 electrons in gases, 873. 



Triode vibrations, on the form of 

 free, 201. 



Triple pendulums with mutual inter- 

 action, on, 17. 



Trouton's rule, on the critical energy 

 increment and, 156. 



Twyman (F.) on an interferometer 

 for testing lenses, 777. 



Tyndall (Prof. A. M.) on manometric 

 measurements at the poles of the 

 electric arc, 956: on the forces 

 acting upon the poles of the electric 

 arc, 972. 



Turpentine and glycerine, on the 

 diffraction of light by mixtures of, 

 669. 



Units and the theory of relativity, 

 on, 431. 



Vacuum tubes, on hydrogen spectra 

 from long, 729. 



Vegard (Prof. L.)on recent results 

 of northlight investigations and 

 the nature of the cosmic electric 

 rayp, 47. 



Vibrations of a crystalline medium, 

 on the, 148 ; on a type of, of an 

 elastic spherical shell, 1 85. 



Viscosity, on the coefficient of, of 

 metals, 115, 397 : of ammonia, 

 phosphine, and arsine, on the, 602 ; 



of methane, sulphuretted hydro- 

 gen, and cyanogen, on the, 615; 

 on the measurement of, of gases, 

 1022. 

 Viscous fluid, on the decay of oscil- 

 lation of a solid body in a, 628. 



motion, on the solution of 



an integral eauation in. 620. 

 Walker (Dr. W. J.) on fluid dis- 

 charges as affected bv resistance to 

 flow, 138. 

 Waran (H. P.) on an apparatus for 

 preparing pure nitrogen or carbon 

 monoxide, 246. 

 Water, on the rate of solution of 



nitrogen and oxygen by, 87. 

 Waves, on sound, in the atmosphere, 



96. 

 Whirling speeds of a loaded shaft, 



on the, 635. 

 Wills (Dr. L. J.) on the lower palaeo- 

 zoic rocks of Llangollen, 197. 

 Wilsey (R. B.) on the crystal struc- 

 ture of the silver halides, 262. 

 Wireless waves, on the reception of, 



on a shielded frame aerial, 502. 

 Wires, on the sound emitted by, ex- 

 posed to au air-current, 173 ; on 

 electric oscillations in, 265. 

 Wood (Prof. R. W.) on hydrogen 

 spectra from long vacuum tubes, 

 729. 

 Wrinch (Dr. D.) on fundamental 

 principles of scientific inquirv, 

 369, 

 X-ray bulb with a liquid mercury 



anticathode, on an ; 419. 

 X-rays, on the intensity of reflexion 

 of, by rock-salt, 1 ; on the scatter- 

 ing of rays in diffraction of, 302 ; 

 on the excitation of soft charac- 

 teristic, 1015. 

 Xenon, on the mass spectra of, 142. 

 Zinc, on the viscosity of, 115 ; on 

 the variation of the rigidity of, 

 with temperature, 409. 



END OF THE FORTY-SECOND VOLUME. 



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