524 



INDEX. 



Rydberg (Dr. J. R.) on the structure 



of the line-spectra of the chemical 

 elements, 331. 



Santa Marta, on the geological age 

 of the mountains of, 163. 



Schuster (A.) on the disruptive dis- 

 charge of electricity through gases, 

 182. 



Selby (A. L.) on two pulsating 

 spheres in a liquid, 113. 



Sheldon (S.) on the magnetism of 

 nickel and tungsten alloys, 136. 



Smith (Rev. F. J.) on the applica- 

 tion of hydraulic power to mer- 

 curial pumps, 138 ; on a new form 

 of electric chronograph, 377 ; on a 

 mercury-still for the rapid distilla- 

 tion of mercury in a vacuum, 501. 



Solid, on the distribution of flow in 

 a strained elastic, 503. 



Solutions, on the nature of, 427, 490. 



Spark, on the heat developed in the, 

 214. 



Spectra, on the structure of the hue-, 

 of the chemical elements, 331 ; on 

 real and accidental coincidences 

 between the lines of different, 462. 



Spheres in a liquid, on two pulsating, 

 113. 



Stannic chloride, on the electrical and 

 chemical properties of, 383, 480. 



Steam-jet, on the electrification of a, 

 158. 



Steel under mechanical stress, on the 

 behaviour of, 200. 



Stefan (Prof. J.) on evaporation and 

 solution as processes of diffusion, 

 139 ; on electrical vibrations in 

 straight conductors, 373, 450. 



Stifle (Capt. A. W.) on the glacia- 

 tion of the valleys of the Jhelam 

 and Sind rivers, 135. 



Stoney (G. J.) on texture in media, 

 and on the non-existence of density 

 in the elemental aether, 467. 

 Strips, behaviour of twisted, 244. 

 Tait (Prof.) on the importance of 



quaternions in physics, 84. 

 Telethermometer, on a, 291. 

 Thomson (Prof. J. J.) on the passage 

 of electricity through hot gases, 

 358, 441. 



Thomson (Sir W.) on the direction 

 of the induced longitudinal current 

 in iron and nickel wires by twist 

 wheu under longitudinal magne- 

 tizing force, 132 ; on the time-in- 

 tegral of a transient electromag- 

 netically induced current, 276. 



Threlfall (Prof. R.) on sensitive gal- 

 vanometers, 508. 



Tomlinson (H.) on the effect of re- 

 peated heating and cooling on the 

 electrical resistance of iron, 77 ; on 

 the Villari critical points of nickel 

 and iron, 394. 



Torsion and detorsion of metal wires, 

 on the changes of temperature re- 

 sulting from the, 140. 



Trouton (F. T.) on the acceleration of 

 secondary electromagnetic waves, 

 268. 



Trowbridge (J.) on the magnetism of 

 nickel and tungsten alloys, 136. 



Tungsten and nickel alloys, on the 

 magnetism of, 136. 



Vibrations of an atmosphere, on the, 

 173. 



on electrical, in straight con- 

 ductors, 373 : in rarefied air with- 

 out electrodes, 375. 



Villari (E.) on the resistance of hy- 

 drogen and other gases to the 

 current and to electrical discharges, 

 and on the heat developed in the 

 spark, 214. 



Villari critical points of nickel and 

 iron, on the, 394. 



Viscosity, on the change of the order 

 of absolute, encountered on passing 

 from fluid to solid, 337. 



Wassmuth (Dr. A.) on the changes 

 of temperature resulting froin the 

 torsion and detorsion of metal 

 wires, 140. 

 Wires, on the changes of temperature 

 resulting from the torsion and de- 

 torsion of metal, 140; on the effect 

 of permanent elongation on the 

 cross section of hard-drawn, 355. 



Worth (R. N.) on the igneous con- 

 stituents of the Triassic breccias 

 and conglomerates of S. Devon, 134. 



END OF THE TWENTY-NINTH VOLUME. 



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



