550 



INDEX. 



Diazoamido-conipounds, on the con- 

 stitution of the, 513. 



Differential equation of the most 

 general substitution of one vari- 

 able, on a, 542. 

 Diffusion, on liquid, 1 ; on gaseous, 

 305. 



Discordant observations, on, 364. 



Dissociation, on, 435. 



Duboscq lantern, on an arc-lamp for 

 use with the, 333. 



Dynamical theorem, on some curious 

 consequences of a well-known, 544. 



Dynamo, on the law of the, 338. 



Earth, on the contraction during cool- 

 ing of a solid, 145. 



Edge worth (F. Y.) on discordant 

 observations, 364. 



Elasticity, on the longitudinal and 

 torsional, of iron, 249. 



Electric current, on the passage of 

 the, through air, 384. 



Electrical resistance of vertically- 

 suspended wires, on the, 499. 



Electricity, notes on, 225; on the 

 action of the discharge of, of high 

 potential on solid particles sus- 

 pended in the air, 301 ; on an ap- 

 paratus for the condensation of 

 smoke by statical, 471. 



Electrification, on the heating of the 

 glass of condensers by intermittent, 

 472. 



Electromagnet, on the law of the, 

 338. 



Electromagnetic disturbances into 

 wires, on the propagation of, 10. 



Error, on the law of, 364. 



Extensometers, on various, 285. 



Evaporation, on, 435. 



Fae (Dr. G.) on the electrical resist- 

 ance of antimony and cobalt in a 

 magnetic field, 540. 



Fibres, on very fine glass and quartz, 

 489. 



Fisher (Rev. O.) on the amount of 

 the elevations attributable to com- 

 pression through the contraction 

 during cooling of a solid earth, 145. 



Fluid motion, on the stability of 

 steady and of periodic, 459. 



Foster (Prof. G. 0.) on a method of 

 determining coefficients of mutual 

 induction, 121. 



Galvanometer, ballistic, on the deter- 

 mination of coefficients of mutual 

 induction by means of the, 412. 



Galvanometers, on silk v. wire sus- 

 pensions in, 46, 149. 



Gas, on the equilibrium of a, under 

 its own gravitation only, 287. 



Gaseous state, on the transition from 

 the liquid to the, of matter, 435, 547. 



Gases, on the foundations of the ki- 

 netic theory of, 141 ; on the che- 

 mical combination of, 379, 472. 



Geological Society, proceedings of 

 the, 69, 221, 466. 



Gibson (E.) on the tenacity of spun 

 glass, 351. 



Glass, on the tenacity of spun, 351 ; 

 on the finest fibres of, 489. 



Gray (T.) on silk v. wire suspensions 

 in galvanometers and on the ri- 

 gidity of silk fibre, 46 ; on an im- 

 proved form of seismograph, 353. 



Gregory (R. A.) on the tenacity of 

 spun glass, 351. 



Heat, on the action of, on potassic 

 chlorate and perchlorate, 375. 



Heaviside (0.) on the self-induction 

 of wires, 10, 173. 



Hesehus (M.) on the conductivity of 

 sound, 548. 



Hughes (Prof. T. M'K.) on the drifts 

 of the Vale of Clwyd, 69. 



Induction, on a method of determi- 

 ning coefficients of mutual, 121, 

 412. 



Induction-balances, on, 184. 



Inductor, on the determination of 

 coefficients of mutual induction by 

 means of the ballistic galvanometer 

 and earth-, 412. 



Integrator, on a form of spherical, 

 381. 



Iron, on the behaviour of, under the 

 operation of feeble magnetic forces, 

 225 ; on some of the physical pro- 

 perties of, 245. 



Irving (Rev. A.) on the physical his- 

 tory of the Bagshot beds of the 

 London basin, 467. 



Kathode, on metallic layers which 

 result from the volatilization of a, 

 384. 



Lever, on the order of, to which the 

 oar belongs, 58, 222. 



Liebreich (0.) on the inert space in 

 chemical reactions, 468. 



Light, on Cauchy's theory of reflec- 

 tion and refraction of, 151 ; on the 

 relative wave-lengths of, 257 ; on 

 the absolute wave-length of ; 265. 



