546 



INDEX. 



Iron, on the sudden loss of the mag- 

 netic properties of, at certain tem- 

 peratures, 18; on the magnetic 

 permeability of a bar of, 274 ; on 

 the mean intensity of magnetiza- 

 tion of soft bars of, in a uniform 

 magnetic field, 450. 



Ivory, on the influence of moisture 

 on, 319. 



Johnston-Lavis (Dr. H. J.) on the 

 ejected blocks of Monte Somma, 

 312. 



Joly (J.) on a diffusion photometer, 

 26; on a method of determining 

 the specific gravity of small quan- 

 tities of dense or porous bodies, 

 29 ; on a hydrostatic balance, 266. 



Kayser (H.) on the disintegration of 

 ignited platinum, 393. 



Kerr (Dr. J.) on the birefringent 

 action of strained glass, 321. 



Kilroe (J. R.) on the directions ol 

 ice-flow in the north of Ireland, 

 310. 



Kolbe (B.) on an electroscope for 

 purposes of demonstration, 467. 



Kundt (Prof. A.) on the indices of 

 refraction of the metals, 1. 



"Labile," definition of the term, 417. 



Langley (Prof. S. P.) on the invisible 

 solar and lunar spectrum, 505. 



Light, on the connexion between the 

 indices of refraction of the metals 

 and their power of conducting, 16 ; 

 on the electrification of metal 

 plates by irradiation with elec- 

 trical, 78 ; on the reflexion of, at 

 a twin plane of a crystal, 241 ; on 

 the influence of, upon electric dis- 

 charge, 272 ; on selective absorp- 

 tion of metals for ultra-violet, 316 ; 

 on a kind of electrical current pro- 

 duced by ultra-violet, 317 ; on the 

 reflexion and refraction of, 414, 

 500. 



Lightning, on some effects of, 114. 



Lightning-conductors, on the theory 

 of, 217. 



Liquids, on Verdet's constant of, 314 ; 

 on the changes in the specific heat 

 of, near the critical temperature, 

 467 ; on the velocity of sound in, 

 468. 



Liveing (Prof.) on the absorption- 

 spectrum of oxygen, 286. 



Lodge (Prof. O. J.) on the theory of 

 lightning-conductors, 217. 



Low (W.) on magnetic permeability 

 of an iron bar, 274. 



Magie (Dr. "W. F.) on the contact- 

 angle of liquids and solids, 162. 



Magnet, on the action of a, on chemi- 

 cal action, 105. 



Magnetic lag, on, 34. ? 



permeability of an iron 



bar, on the, 274; properties of 

 iron and nickel, on the sudden 

 loss of the, 18. 



Magnetization of soft iron bars in a 

 uniform magnetic field, on the 

 mean intensity of, 450. 



Magnetometer, on some additions to 

 the Kew, 122. 



Magnets, on formulae for the lifting- 

 power of, 70. 



Marsh (J. E.) on Van'tHoff's hypo- 

 thesis, and the constitution of ben- 

 zene, 426. 



Martini (T.) on the velocity of sound 

 in liquids, 468. 



Maxwell's theory of the viscosity of 

 solids, on, 183. 



Meldola (R.) on the quantivalence of 

 oxygen, 403. 



Metal plates, on the electrification of, 

 by irradiation with electrical light, 

 78. 



Metals, on the indices of refraction of 

 the, 1 ; on selective absorption of, 

 for ultra-violet light, 316. 



Michelson (W.) on the electroareo- 

 meter, 238. 



Mirage, on some phenomena of, 

 466. 



Moisture, on the influence of, on the 

 length of certain woods, and ivory, 

 319. 



Nickel, on the sudden loss of the 

 magnetic properties of, at certain 

 temperatures, 18. 



Nitrogen, on the compressibility of, 

 up to 3000 atmospheres, 541. 



Optical problems, on the application 

 of Sir W. Thomson's theory of a 

 contractile aether to various, 521. 



Osmotic pressure in the analogy be- 

 tween solutions and gases, on the 

 function of, 81. 



Oxygen, on the absorption-spectrum 

 of, 286 ; on the quantivalence of, 

 403 ; on the compressibility of, up 

 to 3000 atmospheres, 541. 



Parker (J.) on themoelectric pheno- 

 mena, 353. 



