I N D E X. 



OiO 



Knott (Prof. C. G.) on Swan's prism 

 photometer, 118. 



Lake (P.) on Bala lake, 501. 



Lamplugh (G. W.) on effects of 

 earth-movement on rocks in the 

 Isle of Man, 325. 



Lap worth (H.) on the Silurian 

 sequence of Rhayader, 155. 



Lees (Dr. C. PI.) on the conducti- 

 vities of heterogeneous media for 

 a steady flux having- a potential, 

 221 ; on the thermal conductivities 

 of mixtures and their constituents, 

 280. 



Lemoine (M.) on Kerr's phenome- 

 non, 158. 



Lenses, on obliquely crossed cylin- 

 drical, 316 ; on improved formulae 

 and methods connected with, 447. 



Light, photometry of the diffuse re- 

 flexion of, on matt surfaces, 199, 

 324; on the electromagnetic theory 

 of, 228 ; on the coincidence of re- 

 fracted rays of, in crystalline 

 media, 262. 



Lodge (Prof. O.) on the controversy 

 concerning Volta's contact force, 

 351, 454. 



Lummer (Prof. 0.) on the prism 

 photometer, 541. 



McAulay (Prof. A.) on the electro- 

 magnetic theory of light, 228. 



McMahon (Lieut-Gen. C. A.) on the 

 geology of Gilgit, 571. 



Mrgnetic properties of the alloys of 

 iron and aluminium, on the, 121. 



Magnetization, on the change of 

 volume and length in iron, SLteel, 

 and nickel ovoids by, 329. 



Marchant (Dr. E. W.) on the eche- 

 lon spectroscope, 384; on the 

 Zeenirin effect on the chief lines in 

 the mercury spectrum, 394, 503. 



Mass, on the influence of proximity 

 of, upon electric conduction- 

 resistance, 558. 



Mass-affinity, on Helmholtz's view 

 of electric, 472. 



Mather (T.) on the use of Pi ice's 

 guard-wire in insulation tests, 343. 



Matley (C. A.) on the geology of 

 Northern Anglesey, 414. 



Matt surfaces, photometry of the 

 diffuse reflexion of light on, 199, 

 324. 



Maxwell-Boltzmann law of equal 

 partition of energy, on the, 98, 

 226. 



Mercury spectrum, on the Zeeman 

 effect on the chief line3 in the, 394. 



Metals, on the heat of combination 

 of, in the formation of alloys, 405. 



Milner (Dr. S. R.) on the theory of 

 solution pressure, 417. 



Mixtures and their constituents, on 

 the thermal conductivities of, 286. 



Moore (T. S.) on the reversibility of 

 voltaic cells, 491. 



More (Prof. L. T.) on the coinci- 

 dence of refracted rays of light in 

 crystalline media, 262. 



Morris-Airey (H.) on electrolytic 

 convection in Geissler-tubes, 307. 



Nagaoka (H.) on the change of 

 volume and length in iron, steel, 

 and nickel ovoids by magnetiza- 

 tion, 329. 



Nickel ovoids, on the change of 

 volume and length in, by mag- 

 netization, 329. 



Nickel-iron alloy, on the thermo- 

 electric behaviour of an, 309. 



Osmotic-pressure hypothesis of a 

 voltaic cell, on the, 454. 



Oxygen, on the rate of effusion of, 

 423. 



Peirce (B. 0.) on the thermal con- 

 ductivity of vulcanite, 15. 



Petrovitch's apparatus for integra- 

 ting differential equations, on, 

 487. 



Photometer, on Swan's prism, 118, 

 541. 



Photometry of the diffuse reflexion 

 of light on matt surfaces, on the, 

 199. 



Planets, on an interference method 

 of measuring the diameters of dis- 

 tant, 503. 



Porcelain, on the expansion of, 90. 



Price (W. A.) on Petrovitch's ap- 

 paratus for integrating differential 

 equations, 487.' 



Price's guard-wire, on the use of, in 

 insulation tests, 343. 



Radiation, on the law of complete, 

 539; on thermal, in absolute 

 measure, 543. 



Radio-active substance emitted from 

 thorium compounds, on a, 1. 



Radio-activity produced in sub- 

 stances by thorium compounds, on 

 161. 



Rayleigh (Lord) on the law of par- 

 tition of kinetic energy, 98; on 

 the passage of argon through thin 



