-^@>^^ 



872 



INDEX. 



Simpson (Dr. G. C.) on the theory 



of thunderstorm electricity, 619. 



Smith (Dr. S. W. J.) on the action 



between metals and acids, 833. 



Snow (E. 0.) on Pirani's method of 

 measuring the self-inductance of 

 a coil, 849. 



Sodium - potassium alloy, on the 

 photo-electric properties of, 286. 



Solids, on the motion of electrons 

 in, 773. 



Solutions, on surface separation 

 from, 560 ; on the action of 

 electrolytes on copper colloidal, 

 583; on the osmotic theory of, 

 598; on the absorption of ultra- 

 violet light by dilute, 710. 



Spark discharge of a condenser, on 

 the effect of an air-blast on the, 677. 



Spectrum of radium emanation, on 

 the, 202, 656 ; on the secondary, 

 of hydrogen, 581. 



Sphere, on the impulsive motion of 

 an electrified, 43. 



Stability, on induced, 765. 



Starling (S. G.) on the treatment of 

 electrodynamics, 767. 



Stephenson (A.) on the frequency 

 ranges of non-generating force, 

 164 ; on induced stability, 765. 



Surface - concentration, on Gibbs's 

 theory of, 466. 



forces, on the theory of, 333. 



separation from solutions of 



saponin, peptone, and albumin, 

 on, 560. 



Sutherland (W.) on molecular dia- 

 meters, 320 ; on the electric origin 

 of molecular attraction, 657. 



Temperature-radiation and the parti- 

 tion of energy in continuous media, 

 on, 229. 



Terrestrial magnetism, on, 655. 



Thermionics, on, 813. 



Thompson (Prof. S. P.) on the self- 

 demagnetizing factor of bar mag- 

 nets, 729. 



Thorium, on the diffusion of the 

 emanation of, 412 ; on the distri- 

 bution of, in the earth's surface 

 materials, 760. 



Thunderstorm electricitv, on the 

 theory of, 619, 634. 



Tin, on the coefficient of viscous 

 traction of alloys of, 192. 



Tinfoil, on the absorption and re- 

 flexion of /3 rays by, 128. 



Trowbridge (Prof. J.) on theDoppler 

 effect in positive rays, 520. 



Twisting and bending moments, on 

 a machine for applying, simultane- 

 ously, 496. 



Ultra- microscopic method, on the 

 discovery of the, 495. 



Ultra-violet light, on the absorption 

 of, by dilute solutions, 710. 



Variables, on the law of probability 

 for a system of correlated, 1. 



Viscosity of water, on the, 502; of 

 lithium-chloride solutions, 519. 



Viscous traction of lead and tin 

 alloys, on the coefficient of, 192. 



Vogt (Prof. J. IT. L.) on labradorite- 

 norite with porphyritic labradorite, 

 769. 



Water, on the amount of, in a cloud 

 formed by expansion of moist air, 

 190; on the absorbing power of, 

 for y rays, 315 ; on the viscosity 

 of, 502. 



Water vapour, on the dissociation 

 of, 715. 



Waves, on the damping of long, in 

 a rectangular trough, 154; on 

 Huygens's secondary, 204. 



Wellisch (E. M.) on the relighting 

 of the carbon arc, 449. 



Wilson (C. T. R.) on the theory of 

 thunderstorm electricity, 634. 



Wilson ( W.) on the effect of pressure 

 on ionization, and on the ioni- 

 zation produced by the y rays, 

 216 ; on the radioactive products 

 present in the atmosphere, 321. 



Wires, on the inductance of two 

 parallel, 255 ; on the resistance 

 and inductance of thick, 524. 

 Wood (Prof. R. W.) on the theory 



of the greenhouse, 319. 

 Wright (C. S.) on variations in the 

 conductivity of air enclosed in 

 metallic receivers, 295. 

 Xenon, on the molecular constants 



of, 795. 

 X-rays, on a want of symmetry 

 shown by secondary, 855. 



END OF THE SEVENTEENTH VOLUME. 



Printed by Taylor and Francis, Ked Lion Court, Fleet Street. 



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