450 



INDEX. 



a new demonstration of Riemann's 

 theorem, 447. 



Crova (A.) on the photometric com- 

 parison of sources of light of differ- 

 ent tints, 445. 



Crystallographic notes, 26. 



Douglas (J. 0.) on the phenomenon 

 called the " cry of tin/' 77. 



Earthquake motions, on instruments 

 for measuring and recording, 199. 



observations and experiments, 



356. 



Ebouite, on the index of refraction 

 of, 196. 



Electric potential, on the absolute 

 scale of, 13. 



Electrical resistance, on the best ar- 

 rangement of the TVheatstone's 

 bridge for the measurement of a par- 

 ticular, 283. 



testing, on, 380, 



Electricity, on the principle of the 

 conservation of, 13, 151. 



Electromagnetic experiments with 

 open circuits, on some, 49. 



induction, on curves of, 330. 



theory of light; on the, 81. 



unit, on the number of electro- 

 static units in the, 76, 154, 224, 

 300, 301. 



Electrophorus, on the division of in- 

 duction in the, 130. 



Electrostatic investigations, 130. 



Energy, on the relations between 

 matter, electricity, and, 16. 



Eilms, experiments with liquid, 444. 



Fletcher (L.) crvstallographic notes 

 by, 26. 



Gaiffe (M.) on the magnetic metals, 

 307. 



Gases, on magnetic rotatory polari- 

 zation in, 309, 394. 



Geological Society, proceedings of 

 the, 69. 



Grant (W.) on curves of electromag- 

 netic induction, 330. 



Gray (A.) on the number of electro- 

 magnetic units in the electrostatic 

 unit, 301. 



Gray (T.) on instruments for mea- 

 suring and recording earthquake 

 motions, 199 ; on the best arrange- 

 ment of the Wheatstone's bridge 

 for the measurement of a particular 

 resistance, 283 ; on earthquake ex- 

 periments in Japan, 356. 



Hall (Dr. E. EL) on the rotational 

 coefficient in nickel and cobalt, 157. 



Hart (Dr. S. L.) on some capillo- 

 electric effects, and a theory of 

 contact-potential, 321. 



Heat-waves, on the effect of tempe- 

 rature, changes of specific heat, and 

 conductivity on the propagation of, 

 147. 



Huggins (Dr. W.) on the photogra- 

 phic spectrum of comet b 1881, 

 155. 



Hunt (Dr. T. S.) on the domain of 

 physiology, or nature in thought 

 and language, 233. 



Ice, on the temperature of melting, 



Kempe (H. R.) on electrical testing, 

 380. 



Laboratory at St. John's College, 

 Oxford, on the, 178. 



Light, on the electromagnetic theory 

 of, 81 ; on a wave-apparatus to 

 illustrate Fresnel's conception of 

 polarized, 145 ; on the transforma- 

 tion of the energy of, into that of 

 sound, 212; photometric compa- 

 rison of sources of, of different 

 tints, 445. 



Lippmann (G.) on the principle of 

 the conservation of electricity, 151. 



Liquefaction produced by the mutual 

 reaction of solid substances, on, 290. 



Liquid films, on the spontaneous 

 thinning of, 379 ; experiment with, 



. 4 ~ 4 

 Liquids, on the ascent of hollow 



glass bulbs in, 27. 



Logical diagrams for n terms, on, 



266. 



Luminiferous aether, on the existence 

 of the, 156. 



Magnetic metals, on the, 307. 



rotatory polarization in gases, 



on, 309, 394. 



Magnetism, on the new action of, on 

 a permanent electric current, 157 ; 

 on molecular, 223. 



Marquand (Dr. A.) on logical dia- 

 grams for n terms, 266. 



Melting-point, on the effect of pres- 

 sure on the, 38. 



Metals, on the magnetic, 307. 



Microphonic action of selenium cells, 



