544 



INDEX. 



and theory of gratings for optical 

 purposes, 469. 



Sarrau (E.) on the compressibility of 

 gases, 306. 



Schuller (A.) on the formation of 

 peroxide of hydrogen during com- 

 bustion, 222. 



Shunt, on a, for alternate currents of 

 high tension, 353. 



Silver, on the fluid density of, 363. 



Skutterudite, on the crystalline forms 

 of, 474. 



Slotte (K. F.) on Wheatstone's 

 bridge, 227. 



Smyth (P.) on the constitution of 

 the lines forming the low-tempe- 

 rature spectrum of oxygen, 330. 



Sound, on the estimation of the di- 

 rection of, with one ear, 343 ; on 

 the conversion of radiant heat into, 

 435, 480. 



Sound-shadows in water, on, 98. 



Space, on the function of the two 

 ears in the perception of, 406. 



Spectrum of oxygen, on the consti- 

 tution of the lines forming the low- 

 temperature, 330. 



Spottiswoode (W.) on a separator 

 and a shunt for alternate currents 

 of high tension, 353. 



Steam, on Regnault's determination 

 of the specific heat of, 337. 



Stereoscope, on an adjustable and re- 

 versible, 322. 



Stereoscopy, on a new mode of, 313. 



Stevens (W. Le Cohte) on physio- 

 logical perspective, 309; on an 

 adjustable and reversible stereo- 

 scope, 322. 



Sulphur and carbon, on the effect of 

 temperature on the electrical re- 



" sistance of mixtures of, 347. 



Sun, on oxygen in the, 333. 



Telephonic currents, on the action of, 

 upon the galvanometer, 468. 



Thompson (Prof. S. P.) on the beats 

 of mistuned consonances, 68 ; on 

 the electric resistance of carbon 

 under pressure, 262 ; on the func- 

 tion of the two ears in the percep- 

 tion of space, 406. 





Thomson (J. J.) on the dimensions 

 of a magnetic pole in the electro- 

 static system of units, 427. 



Tin, on the fluid density of, 362. 



Tommasi (D.) on the action of cold 

 upon the galvanic arc, 75 ; on the 

 electrolysis of distilled water, 377. 



Transformation, note on, 357. 



Tyndall (J.) on the action of free 

 molecules on radiant heat, and its 

 conversion thereby into sound, 435, 

 480. 



Vacua, an examination of, 229. 



Vacuum, on the electrical resistance 

 of, 1 ; on the effects produced in 

 a, by the current of the Gramme 

 machines, 536. 



Vapour, on a vibratory motion at the 

 origin of a jet of, 306. 



Vapour-pressure, on the theoretic de- 

 termination of, 132. 



Vapours, on the rhythmic absorption 

 of radiant heat by, 500. 



Vautier (Th.) on a vibratory motion 

 at the origin of a jet of vapour, 

 306. 



Violle (J.) on the luminous inten- 

 sities of the radiations emitted by 

 incandescent platinum, 147; on the 

 law of radiation, 225. 



Vision, on binocular, 309. 



Water, on sound-shadows in, 98 ; on 

 the combination of, with carbonic 

 acid, 228; on the electrolysis of 

 distilled, 377. 



Water-pipes that do not burst with 

 frost, on, 244. 



Wead (C. K.) on the dimensions of 

 a magnetic pole in the electrostatic 

 system of units, 530. 



Wheatstone's bridge, on, 227. 



Wright (Dr. C. R. A.) on the deter- 

 mination of chemical affinity in 

 terms of electromotive force, 265. 



Wright (L.) on some spiral figures 

 observable in crystals, 20. 



Wrightson (T.) on the fluid density 

 of certain metals, 360. 



Wroblewski (S.) on the combination 

 of carbonic acid and water, r 228. 



Zinc, on the fluid density of, 363. 



END OF THE THIRTEENTH VOLUME. 



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



