INDEX. 



551 



Iceland spar, on the law of extiaor- 



dinary refraction in, 316. 

 Iodine,onthe primary spectrum of,156. 

 Iron, on the heat-conducting power 



of, 481. 

 Jamin (M.) on the cooling of gases, 



241, 457. 

 Lantern-galvanometer, on a new, 25. 

 Life, on the theories of, 14. 

 Light, on optical phenomena pro- 

 duced by crystals submitted to cir- 

 cularly polarized, 69 ; heat, and 

 electricity, on wave-theories of, 

 210; on the definition of intensity 

 in the theory of, 304. 

 Liquid, on the steady flow of a, 30. 

 Logarithmic tables, on some new facts 



in the early history of, 291, 500. 

 Lucas (F.) on the duration of the 



electric spark; 316. 



Magnesium, on a singular appearance 



of, in the chromosphere of the sun, 



15.9, 4/9. 



Magnetism, terrestrial, on a supposed 



periodicity in the elements of, 141. 



Mallet (R.) on the origin and cosmical 



relations of volcanic energy, 468. 

 Marcet (Dr. W.) on the nutrition of 

 muscular and pulmonary tissues, 

 349, 443. 

 Mayer (Prof. A. M.) on a new lantern- 

 galvanometer, 25 ; on a method of 

 tracing the progress and of deter- 

 minmg the boundary of a wave of 

 - conducted heat, 2b'i ; on acoustical 

 experiments, 320 ; on a method of 

 detecting the phases of vibration in 

 the air surrounding a sounding 

 body, 321. 

 Mensbrugghe (G. van der) on super- 

 saturated saline solutions, 223. 

 Metals, experiments on collision with 



balls of different, 545. 

 Meteoric iron from Virginia, on the 



gases occluded in, 311, 

 Mills (Dr. £. J.j on elective attrac- 

 tion, 50(j. 

 Molecular motion, on the determin- 

 ing causes of , 1 . 

 Moon, on earthlight on the, 123. 

 Moon (R.) on gaseous ))ressure, 101; 

 on the definition of intensity in the 

 theories of light and sound, 304. 

 Morton (Prof. H.) on the fluorescent 

 relations of certain solid hydrocar- 

 bons, 345. 



Moseley (Canon) on the steady flow 



of a liquid, 30. 

 Muscular tissue, on the constitution 



and nutrition of, in phthisis, 448. 

 Natural selection, observations on the 



theory of, 19. 

 Nitrogen, on the spectrum of, 537. 



Oxygen, on the action of, on copper 

 nitrate in a state of tension, 139 ; 

 on the action of electricity on, 470. 



Ozone, on a simple apparatus for the 

 production of, 156 ; on the action 

 of, upon vulcanized caoutchouc, 

 235 ; on the unit of, 473 ; on the 

 absorption of, by water, 544. 



Phosphatic nodules of the Cretace- 

 ous rock of Cambridgeshire, on the, 

 543. 



Photography, on the reproduction of 

 diffraction-gratings bv means of, 

 392. 



Phthisis, on the nutrition of muscular 

 and pulmonary tissues when affected 

 with disease from, 448. 



Pitch, on variations of, in beats, 56. 



Plants, on the colloid condition of, 446. 



Pulmonary tissue, on the constitution 

 and nutrition of, 443. 



Pyrometry, on electrical, 80. 



Richard (M.) on the cooling of gases, 

 241, 457. 



Royal Institution, proceedings of the, 

 69. 



Roval Society, proceedings of the, 

 73, 139, 223, 311, 392, 468, 537. 



Salet (G.) on the primary spectrum 

 of iodme, 156. 



Saline solutions, on supersaturated, 

 223. 



Sarrasin (E.) on the electric jet in 

 rarefied gases, 149. 



Schneebeli (H.) on the collision of 

 elastic bodies, 4/6, 546. 



Schuster (A.) on the spectrum of ni- 

 trogen, 537. 



Schwendler (L.) on differential galva- 

 nometers, 161. 



Shaler (Prof. N. S.) on earthhght on 

 the moon, 123. 



Smith (H. A.) on some points in the 

 chem;sLiy ot acid-manufacture, 3/0. 

 Soiet(J. L.) on the anomalous dis- 

 persion exhibited by certain sub- 

 stances, 395. 



Sound, on the definition of intensity 

 in the theories of light and, 304. 



