452 



INDEX. 



Radiation, on thermal, at high tem- 

 peratures, 145. 



Rayleigh (Lord), acoustical observa- 

 tions by, 149. 



Reynolds (Prof. 0.) on the mecha- 

 nical theory of Crookes's force, 179. 



Rhonibohedral system, on the ana- 

 lysis of the, 176. 



Rontgen (W. C.) on the electromag- 

 netic rotation of the plane of pola- 

 rization of light in the vapour of 

 sulphide of carbon, 173. 



Rowland (Prof. H. A.) on the mag- 

 netic effects of electric convection, 

 442. 



Schuster (Dr. A.) on an easy method 

 for adjusting the collimator of a 

 spectroscope, 95 ; on spectra of 

 lightning, 316. 



Siemens (Dr. C. W.) on the trans- 

 mission and distribution of energy 

 by the electric current, 352. 



Solar physics, on the application of 

 the photographic method of regis- 

 tering absorption-spectra to, 313. 



Soret (J. L.) on thermal radiation at 

 high temperatures, 145. 



Sound, on the theory of, 181, 261 ; 

 on the velocity of, in small tubes, 

 339. 



Sounds, on the velocity of very loud, 

 219. 



Spectra, on the nature of, 77, 248. 



of lightning, on, 316. 



Spectroscope, on an easy method of 

 adjusting the collimator of a, 95. 



Spectrum of oxygen, on the, 297. 



Starch under the polariscope, on, 39 ; 

 on the optical properties of, 370. 



Stefan (J.) on the diffusion of liquids, 

 74, 295. 



Steinhauser (A.) on the theory of 

 binaural audition, 181, 261. 



Sun's distance, new estimate of the, 



377. 

 Tait (Prof. P. G.) on the dissipation 



of energy, 344. 

 Telegraphy, on electromagnets in, 



143. 

 Telephone, on the inductions that 



occur in the, 34 ; researches on 



Bell's, 222. 

 Temperatures, on the maintenance of 



constant, 411. 

 Thermal conductivity of metals, on 



the determination of the variation 



of the, 198, 251, 380. 

 Thermodynamic motivity, on, 348. 

 Thomson (Sir W.) on the dissipation 



of energy, 344 ; on thermodynamic 



motivity, 348. 

 Trowbridge (Prof. J.) on methods of 



measuring electric currents of great 



strength, 165. 

 Van Tieghem (M.) on the physical 



state of Central Europe during the 



Tertiary period, 72. 

 Vapours, on the magnetic rotatory 



power of, 371. 

 Voltaic action, on the theory of, 109. 

 Vulgar Fractions, on a property of, 



321. 

 Waltenhofen (Prof. A. von) on the 



electrical perforation of glass, 374. 

 Wanklyn (J. A.) on the moist-com- 

 bustion process, 138 ; on the pro- 

 ducts of oxidation of wool, 356. 

 Weber (Prof. H. F.) on the induc- 

 tions that occur in the telephone, 



34. 

 Wiedemann (E.) on the nature of 



spectra, 77 ; on the luminosity of 



gases through electrical discharges, 



248. 

 Wool, on the products of oxidation 



of, 356. 



END OF THE SEVENTH VOLUME. 



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



