530 



INDEX. 



Hatch (Dr. F. H.) on the petrogra- 

 phical characters of some rocks, 

 432. 



Heat and electrical-current mea- 

 suring-instrument, on a continuous, 

 28. 



Heaviside (0.) on the general solu- 

 tion of Maxwell's electromagnetic 

 equations, 29 ; on the motion of 

 electrification through a dielectric, 

 324. 



Helix, on the coefficient of mutual 

 induction ofa circle and a coaxal, 56. 



Herrouu (Prof. E. F.) on the di- 

 vergence of electromotive forces 

 from thermochemical data, 209. 



Hertz (Dr. H.) on rays of electric 

 force, 289. 



Hill ( W.) on colloid silica, 433. 



Hookham (G.) on permanent mag- 

 net circuits, 186. 



Hutchinson (C. A.) on the electro- 

 magnetic efiect of convection-cur- 

 rents, 445. 



Interference, on the limit to, when 

 light is radiated from moving 

 molecules, 298. 



bands, on the visibility of faint, 



484. 



Iron rails, on the rusting of, 442. 



Isohydrie solutions, on the theory of, 

 287. 



Isotherms of gases, on the, 527. 



Jolmstone (A.) on the action of 

 pure water and of water saturated 

 with carbonic-acid gas on the 

 micas, 362. 



Jones (Prof J. V.) on the coefficient 

 of mutual induction of a circle and 

 a coaxal helix, 56 ; on the use of 

 Lissajous' figures to determine a 

 rate of rotation, and of a Morse 

 receiver to measure the periodic 

 time of a reed or tuning-fork, 349. 



Judd (Prof. J. W.) on the gTowth 

 of crj^stals in igneous rocks, 278 ; 

 on the tertiary volcanoes of the 

 western isles of Scotland, 279. 



Jukes-Browne (A. J.) on colloid 

 silica, 433. 



Koller (H.) on the passage of elec- 

 tricity througli bad conductors, 

 526. 



Laminfe, on the physical properties 

 of thin solid, 79. 



Lamplugh (G. W.) on the subdivi- 

 sions of the Speeton Clay, 429. 



Langley (Prof S. P.) on energy and 

 vision, 1. 



Lead, on the thermo-voltaic con- 

 stant of, 224. 



Light, from coloured surfaces, on the 

 measurement of luminosity and 

 intensity of, 62 : on the polariza- 

 tion of sky, 81 ; comparison of the 

 electric theory of, and the theory 

 of a quasi-laiaile aether, 238 ; on 

 the limit to interference when 

 radiated from moving molecules, 

 298 ; on the rotation of the plane 

 of polarization of, by the discharge 

 of a Ley den jar, 329. 



Lightning, on some effects of, 208. 



Lissajous' figures, on the use of, to 

 determine a rate of rotation, 349. 



Lodge (Dr. 0.) on the rotation of the 

 plane of polarization of light by 

 the discharge of a Iieyden jar, 

 329 ; on an electrostatic field pro- 

 duced by varying magnetic induc- 

 tion, 469. 



Love (A. E. H.) on the oscillations 

 of a rotating liquid spheroid, and 

 the genesis of the moon, 254. 



McConnel (J. C.) on the polariza- 

 tion of sky light, 81. 



Magnet circuits, on permanent, 186. 



Magnetization, on the eflects of tor- 

 sion and longitudinal stress on the, 

 of nickel, 117 ; on the effect of 

 twist in, 206. 



Magnets, on steel, 270. 



Mascart (M.) on the achromatism 

 of interferences, 519. 



Measurement, on the systems of 

 scientific units of, 104, 178. 



Mebius (C. A.) on the alteration of 

 the constant of elasticity of metals 

 by the electrical current, 207. 



Mercury, on the thermo-voltaic con- 

 stant of, 218. 



Mercury- dropping electrodes, on, 365, 

 384. 



Merrill (G. P.) on the ophiolite of 

 Thurman,N.Y., and on the Eozoon 

 canadense, 363. 



Metals, on the alteration of the con- 

 stant of elasticity of, by the elec- 

 trical current, 207. 



Mica, on the action of water, pure 



