INDEX. 



455 



Iodides, on the laws governing the 

 decomposition of equivalent solu- 

 tions of, 89. 



Iodine, on the vapour-density of, 140, 

 141. 



Iron, on the thermoelectric power of, 

 in vacuo, 450. 



Johnstone ("W. P.) on a method of 

 identifying a submerged telegraph- 

 cable without cutting it, 69. 



Joubert (J.) on the law of magneto- 

 electric machines, 298, 384. 



Joule's equivalent, on the cosmical 

 determination of, 70. 



Kendall (J. D.) on interglacial depo- 

 sits of West Cumberland and North 

 Lancashire, 448. 



Koyl (C. H.) on the colours of thin 

 blowpipe deposits, 295. 



Kundt (A.) on anomalous dispersion 

 in incandescent sodium vapour, 53. 



Lea (M, C.) on substances possessing 

 the power of developing the latent 

 photographic image, 70. 



Lecher (M.) on the absorption of ra- 

 diant heat by gases and vapours, 

 210. 



Leeds (Dr. R.) on the decomposition of 

 equivalent solutions of iodides, 89. 



Light, on the effects produced by 

 mixing white with coloured, 209. 



Lightning-conductor, on the space 

 protected by a, 427. 



Liquids, on the behaviour of, near 

 their critical temperatures, 145; 

 on the conductivity of, 328. 



Liveing (E. H.) on a new instrument 

 for the detection and measurement 

 of inflammable gas in urines, 126. 



M'Coll (H.) on the diagrammatic 

 and mechanical representation of 

 propositions and reasonings, 168. 



Macfarlane (Dr. A.) on the disrup- 

 tive discharge of electricity, 389. 



Magnetism, on the new action of, on 

 a permanent electric current, 301, 

 430. 



Magneto-electric induction, on, 328. 



machines, on the law of, 



298, 384. 



Magnets, on the action of hollow, in 

 comparison with that of solid steel, 

 213. 



Mars, on the figure of the planet, 119. 



Mayer (Dr. A. M.) on Edison'.s paper- 

 carbon electric lamp, 21. 



Minerals, on the determination of the 

 specific gravity of small fragments 

 of, 297. 



Mines, on a new instrument for the 

 detection and measurement of in- 

 flammable gas in, 126. 



Moore (C.) on abnormal geological 

 deposits in the Bristol district, 447. 



Morton (Dr. H.) on Edison's paper- 

 carbon electric lamp, 21. 



Nicol's prism, notes on, 247. 



Orion, photographs of the nebula in, 

 388. 



Peirce (C. S.) on some pendulum 

 experiments, 387. 



Peltier's phenomenon, on the abso- 

 lute measure of, 386. 



Pendulum experiments, results of, 

 387. 



Pernter (M.) on the absorption of ra- 

 diant heat by gases and vapours, 

 210. 



Perry (J.) on the determination of 

 the acceleration of gravity for 

 Tokio, 43. 



Phoneidoscope, on the vibrations of 

 a film in reference to the, 79. 



Phosphorescent action of the electric 

 discharge, on a new, 234. 



Photographic image, on substances 

 possessing the power of developing 

 the latent, 70 ; on the reversal of 

 the developed, 200. 



Plateau (J.) on an application of ac- 

 cidental images, 134. 



Platinum, on the thermo-electric 

 power of, in vacuo, 450. 



Poynting (Prof. J. H.) on a simple 

 form of saccharimeter, 18. 



Preece (W. H.) on the space pro- 

 tected by a lightning-conductor, 

 427. 



Preston (S. T.) on one of the phy- 

 sical premises upon which the 

 finality of universal change is 

 based," 338. 



Propositions and reasonings, on the 

 diagrammatic and mechanical re- 

 presentation of, 1, 168. 

 Quincke (Prof. G.) on electrical ex- 

 pansion, 30. 



Rayleigh (Lord) on the resultant of 

 a large number of vibrations of tho 

 same pitch and of arbitrary pha.se, 

 73 ; on the resolving-power of 

 telescopes, 116. 



