524 



INDEX, 



Solids, on the chemical equilibrium 

 of, 9. 



Solution, on the reduction of results 

 of experiments with special re- 

 ference to the hydrate-theory of, 

 418. 



Spectra, on relations between the 

 lines of various, 359. 



of the elements of MendelejefTs 



second group, on the line-, 368. 



Spectroscopic measurements, on the 

 application of interference- 

 methods to, 338. 



Spectrum, on the smallest percep- 

 tible visual angle in the various 

 parts of the, 76. 



of liquid oxygen, on the ab- 

 sorption-, 447. 



Spring, on the flexure of a flat elastic, 

 182. 



Steel, on the points of recalescence 

 in, 433. 



Stefan (Prof. J.) on the velocity of 

 electricity, 519. 



Streams, on the law that limits the 

 action of flowing, 68. 



Sulphur, on the reflexion of rays 

 of electrical force from plates of, 

 366, 



Surface-tension, on the varation of, 

 with temperature, 430. 



Swinburne (J.) on alternate current- 

 condensers, 102 ; on the electro- 

 meter as a wattmeter, 504. 



Tait gauge, on the, 400. 



Taylor (J. F.) on the proof of the 

 generality of certain formulas in 

 dynamometry, 354. 



Teeple (G. L.) on the alternating 

 electric arc between a ball and 

 point, 172. 



Telescope, on the visibility of inter- 

 fere nce-fringes in the locus of a, 

 256. 



Temperature, on the variation of 

 surface-tension with, 430. 



Thermal expansion of some amal- 

 gams in the liquid state, on the, 

 292. 



Thompson (Prof. S. P.) on the use of 

 fluor-spar in optical instruments, 

 120. 

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

 conductivity of hot gases, 135, 515 ; 

 on the illustration of the properties 

 of the electric field by means of tubes 

 of electrostatic induction, 1-19. 

 Tomlinson (C.) on some efl'ects of 

 small quantities of foreign matter 

 on crystallization, 393. 

 Transformer, on a method of testing 

 the power given to the primary 

 coil of a, 354. 

 Triethylsulphine, on the refraction 



of the iodide of, 448. 

 Uhthoff (W.) on the smallest per- 

 ceptible visual .ingle in the various 

 parts of the spectrum, 76. 

 Vapour, on the condensation of 



aqueous, in capillary spaces, 74. 

 Vernon (H. M.) on the so-called 

 meta-elements, 108 ; on the maxi- 

 mum density of water, 387 ; on 

 manganese tetrachloride, 469. 

 Viscosity of a liquid, on the calcu- 

 lation of the coefficient of, 407. 

 Voltaic combinations, on the role of 



the cation in, 449. 

 Walter (B.) on the optical properties 

 of a-monobromonaphthaline, 367. 

 Water, on the mutual solubility of 

 salts in, 369 ; on the maximum 

 density of, 387. 

 Watson (W.) on the measurement 



of electromagnetic radiation, 44. 

 Wattmeter, on the electrometer as 



a, 604. 

 AVave-motion on water, on Thom- 

 son's law of, 71. 

 Wiedemann (E.) on the motions of 

 atoms in the electrical discharge, 

 288. 

 Wilberforce (L. R.) on the calcula- 

 tion of the coefficient of viscosity 

 of a liquid, 407. 

 Wimshurst (J.) on an alternating 

 and experimental influence-ma- 

 chine, 507. 



END OF THE THIRTY-FIRST VOLUME. 



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



