INDEX. 



703 



Oxygen, on the magnetic suscepti- 

 bility of, 320 ; on the rate of 

 solution of, by water, 385 ; on the 

 mass-spectrum of, 519. 



Parabolic trajectory, on the con- 

 struction of a, 157. 



Pendulums, on coupled, 294. 



Perihelion of a planet, on the ad- 

 vance of the, 626. 



Photographic rendering of contrasts, 

 on the, 151. 



Physical phenomena, on the processes 

 occurring in, 679. 



Pipes, on the velocity of gases in. 

 505. 



Poole (J. H. J.) on the separation of 

 lead into isotopes by centrifuging, 

 372 ; on the effect of centrifuging 

 certain alloys while in the liquid 

 state, 376. 



Prescott (Dr. J.) on the buckling of 

 deep beams, 194. 



Quantum theory and chemical re- 

 actions, on the, 26 ; of spectrum 

 emission, on the, 46; of electric 

 discharge, on the, 223. 



Quaternions, applications of, to the 

 theory of relativity, 439. 



Radiation emitted in gaseous explo- 

 sions, on the, 66, 84; from a 

 cylindrical wall, on, 359 ; on mass, 

 energy, and, 679 ; on the beta- 

 recoil, 690. 



Radioactive elements, on a table of 

 the, 155. 



Radioactivity and the gravitational 

 field, on, 6 r 59. 



Raman (Prof. C. V.) on the sounds 

 of splashes, 145 ; on a mechanical 

 violin-player, 535. 



Rankine (Prof. A. O.) on the rela- 

 tion between illumination and 

 conductivity in selenium, 482 ; 

 on the propagation of light in a 

 gravitational field, 586. 



Ray (S.) on the equivalent shell of a 

 circular current, 134. 



Rayleigh (the late Lord) on resonant 

 reflexion of sound from a perforated 

 wall, 225. 



Refracted ray, on a simple property 

 of a, 223. " * J 



Relativity, on parametric solutions 

 for a fundamental equation in the 

 theory of, 285 ; on an alternative 

 view of, 433 ; applications of qua- 

 ternions to the theory of, 439. 



Renwick (F. F.) on the photographic 

 rendering of contrasts, 151. 



Resonant reflexion of sound, on the, 

 225. 



Rudorf (Dr. G.) on latent heat and 

 surface energy, 238. 



Saha (S. N.) on the equation of 

 state, 456. 



Sand (Dr. H. J. S.) on the cadmium 

 vapour arc lamp, 678. 



Selenium, on the relation between 

 illumination and electric conduc- 

 tivity in, 482. 



Silberst-ein (Dr. L.) on the quantum 

 theory of spectrum emission, 46 ; 

 on the recent eclipse results and 

 Stokes-Planck's tether, 161 ; on 

 the measurement of time, 366 ; 

 on the propagation of light in a 

 gravitational held, 586. 



Silver-lead alloys, on the effect of 

 centrifuging, 376. 



Sky, on the blue colour of the, 423. 



Slate (Prof. F.) on an alternative 

 view of relativity, 433. 



Sone (TV) on the magnetic suscepti- 

 bilities of hydrogen and other 

 gases, 305. 



Sound, on resonant reflexion of, 

 from a perforated wall, 225. 



Specific heat of gases, on the, 551 ; 

 of saturated vapour, on the, 633. 



Spectra, on the excitation of the, of 

 carbon, titanium, and vanadium 

 by thermelectronic currents, 241;; 

 on the mass-, of chemical elements, 

 611 ; on the X-ray, of the elements, 

 694. 



Spectrum emission, on the quantum 

 theory of, 46. 



of copper, on the, 457. 



Spheres, on the inertia of, moving 

 in a fluid, 350 ; on the scattering 

 of light by dielectric, 416. 



Splashes, on the sounds of, 145. 



Steam, on the specific heat of, 551. 



Sun, on the path of a ray of light in 

 the gravitation field of the, 626. 



Surface energy, on latent heat and, 

 32, 238. 



Thermelectronic currents, on the ex- 

 citation of the spectra of carbon, 

 titanium, and vanadium b} r , 241. 



Thomas (H. H.) on the geology of 

 Palestine, 383. 



Thomas (J. S. G.) on the hot-wire 

 anemometer, 505. 



