[ 524 ] 



INDEX to VOL. XXV. 



AbERCROMBY (Hon. R.) on the 

 height, length, and velocity of 

 ocean waves, 263. 



Affinity, remarks on residual, 297. 



Agate pebhles from the Soudan, on 

 some, 442. 



Air, on the determination of the 

 amount of moisture and carbonic 

 acid in the, 77. 



Appalachians, on the formation of 

 the, 450, 521. 



Apparatus, new, for measuring radia- 

 tion, 76; for illustrating the fall 

 of bodies in a vacuum, 77. 



Armstrong (H. E.) on valency, 21. 



Arrhenius (S.) on the action of light 

 upon the electrical conductivity of 

 the haloid salts of silver, 451. 



Aubel (E. v.) on the influence of 

 magnetism and temperature on the 

 electrical resistance of bismuth and 

 its alloys with lead and tin, 191. 



Avogadro's law, on, 81. 



Ayrton (Prof. W. E.) on the effi- 

 ciency of incandescent lamps with 

 direct and alternating currents, 

 476; on the magnetic circuit of 

 dynamo machines, 496. 



Ball (Prof. V.) on eroded agate 

 pebbles from the Soudan, 442 ; on 

 the mode of transport of fragments 

 of granite and other rocks im- 

 bedded in the Carboniferous Lime- 

 stone near Dublin, 443. 



Barlow (W.) on the horizontal move- 

 ments of rocks, 517. 



Bell (L.) on the absolute wave- 

 length of light, 245, 350. 



Bellati (M.) on the influence of light 

 on the thermal conductivity of 

 crystallized selenium, 324. 



Bismuth, on the influence of magne- 

 tism and temperature on the elec- 

 trical resistance of, and its alloys 



with lead and tin, 191 ; on the 

 effect of magnetization on the 

 thermoelectrical properties of, 285. 



Blake (Prof. J. F.) on the Cambrian of 

 North-west Caernarvonshire, 239 ; 

 on the Monian system, 439. 



Blakesley (T. H.) on the conditions 

 of maximum efficiency in the 

 transmission of power by alterna- 

 ting electric currents, 30; on a 

 method of determining the differ- 

 ence in phase of two harmonic 

 currents of electricity having the 

 same period, 295. 



Boltzmann (Prof. L.) on some ques- 

 tions in the kinetic theory of gases, 



Bonney (Prof. T. G.) on stratified 

 palaeozoic rocks near Morlaix, Brit- 

 tany, 71 ; on the Obermittweida 

 conglomerate, 72; on the Huronian 

 series of Sudbury (Canada), ib. 



Books, new : — Unwin's Testing of 

 Materials of Construction, 436; 

 Transactions of the Edinburgh 

 Geological Society, 514. 



Bosanquet (R. H. M.) on the use of 

 the term " resistance," 419. 



Boys (C. V.) on experiments with 

 soap-bubbles, 409. 



Braun (F.) on the emission of light 

 by ignited bodies, 242. 



Buchanan (J.) on a law of distribu- 

 tion of molecular velocities amongst 

 the molecules of a fluid, 165. 



Burbury (S. H.) on the diffusion of 

 gases, 129. 



Capillary analysis, on, 244. 



Carbon, mathematical spectral ana- 

 lysis of, 343. 



Carnot's theorem, on an extension 

 of, 512. 



Cauchv's theory of double refraction, 

 on, 116. 



