549 



INDEX TO VOL. XLIV. 



ABNEY (Lieut.) on electrical pyro- 

 metry, 80. 



Acid- manufacture, on some points in 

 the chemistry of, 370. 



Acoustical experiments, note on some, 

 320. 



Actino-chemistry, researches in, 104, 

 422. 



Airy (G. B.) on a supposed periodi- 

 city in the elements of terrestrial 

 magnetism, 141. 



Alcohol, on the instantaneous oxida- 

 tion of, 237. 



Ammonia, on some properties of an- 

 hydrous liquefied, 315. 



Anthracene, on the spectrum of, 346. 



Arsenic, on the presence of, in alkali- 

 manufacture, 370. 



Atkinson (R. W.) on the atomic 

 theory, 118. 



Atmospheric waves, on, 125. 



Atomic theor}^ on the, 118, 121. 



Attractive and repulsive forces, on the 

 hydrodynamical theory of, 189. 



Aurora, on the spectrum of the, 478. 



Becquerel (M.) on the influence of 

 pressure in the phenomena of en- 

 dosmose and exosmose, 233 ; on 

 some effects of slow actions, 238 ; 

 on the duration of the electric 

 spark, 316. 



Bessel's functions, notes on, 328. 



Bicyclic chuck, on a, 65. 



Birt (W. R.) on atmospheric waves, 

 125. 



Books, new : — Colenso and Hunter's 

 Introductory Algehra, 67 ; Pratt's 

 Treatise on Attractions, Laplace's 

 Functions, and the Figure of the 

 Earth, 68 ; Symons's British Rain- 

 fall, 1871, 138 ; Proctor's The Orbs 

 around us, 388 ; Taylor's Geometry 

 of Conies, 390 ; Ley's Laws of the 



Winds, 391 ; Ranken's Strains in 

 Trusses, 467. 



Bosanquet (R. H. M.) on the deter- 

 mination of the relation between 

 the energy and apparent intensity 

 of sounds of different jjitch, 381. 



Branly (E.) on the measurement of 

 the intensity of currents by the 

 electrometer, 396. 



Brodie (Sir B. C.) on the action of 

 electricity on gases, 470. 



Buff (Prof. H.) on the heat of expan- 

 sion of solid bodies, 644. 



Cailletet (L.) on the influence of 

 pressure on the lines of the spec- 

 trum, 76. 



Caoutchouc, on the action of ozone 

 upon vulcanized, 235. 



Carbon, on the specific heat of, 251, 

 461, 



Cams (L.) on the absorption of ozone 

 by water, 544. 



Cayley (Prof. A.) on a bicyclic chuck, 

 65. 



Cazin (A.) on the duration of the elec- 

 tric spark, 316. 



Challis (Prof.) on the hydrodynamical 

 theory of attractive and repulsive 

 forces, 189. 



Chrysogen, on the absorption-spec- 

 trum of, 347. 



Clausius (Prof. R.) on the mechanical 

 theory of heat, 117; on the con- 

 nexion of the second proposition of 

 the mechanical theory of heat with 

 Hamilton's principle, 365. 



Cooling, on the laws of, 241, 457. 



CroU (J.) on the determining causes 

 of molecular motion, 1. 



Crystals, on optical phenomena pro- 

 duced by, submitted to circularly 

 polarized light, 69. 



Currents, on the measurement of the 



