474 
Melde (F.) on a new kind of sound- 
figures, 324. 
Mercury, on the behaviour of, as an 
electrode, 129. 
Metals, on the relative conducting 
power of, 15. 
Meteor, on the heat engendered by the 
possible fall of a, 338. 
Meteors, on luminosity of, from solar 
reflexion, 287. 
Miller (Prof. W. H.), crystallographic 
notices by, 325. 
Minerals, on several new, 13, 78. 
Moller (M.) on vulpie acid, 211. 
Molecular forces, theory of, 88. 
Moore (C.) on the reptiliferous sand- 
stones of Elgin, 468. 
Nicklés (J.) on the fixation of the 
magnetic image, 164. 
Niemann (M.) on the action of ethy- 
lene on chloride of sulphur, 388. 
Niépce de St. Victor (M.) on the 
action of light upon amylaceous 
substances, 281. 
Niobium, on a new mineral contain- 
ing, 78. 
Optical lecture-experiments, on some, 
162. 
Osmium, on the physical relations of, 
293. 
Owen (Prof.) on some remains of 
Polyptychodon, 158. 
Oxacetie acid and derivatives, 386. 
Oxalan, on the formation and con- 
stitution of, 285. 
Ozone, on the production of, 403. 
Parker (W. K.) on recent and fossil 
Foraminifera from the Mediter- 
ranean area, 161. 
Pavy (Dr. F. W.) on lesions of the ner- 
vous system producing diabetes, 52. 
Percussion of bodies, on the, 430. 
Permanganate of potash, on the pre- 
paration of, 383. 
Petrol, on the preparation and pro- 
perties of, 389. 
Phenylamine, on new derivatives of, 
232. 
Phillips (Dr. J.) on some sections of 
the strata near Oxford, 235. 
Phloroglucine, on the constitution of, 
50. 
Phosphammonium compounds, re- 
searches on the, 306. 
Phosphates, on the artificial produc- 
tion of some native, 380. 
INDEX. 
Phosphoric acid, on new methods of 
estimating, 181, 381. 
Photochemical researches, 61. 
Photographic image, on the com- 
position of the, 186. 
Pinakone, on the preparation and 
properties of, 119. 
Planté (G.) on a new secondary pile 
of great power, 468. 
Poinsot (M.) on the percussion of 
bodies, 430. 
Polyptychodon, on some remains of, 
158 
Ponton (M.) on certain laws of chro- 
matic dispersion, 165, 263, 364; on 
the law of the wave-lengths cor- 
responding to certain points in the 
solar spectrum, 437. 
Potyka (Dr. J.) on a new mineral 
containing niobium, 78. 
Powell (Rev. B.) on some recently 
determined refractive indices, 463. 
Pratt (Archdeacon) on the solidity and 
fluidity of the mass of the earth, 
274, 343. 
Propionic acid, on the formation of, 
384. 
Pseudo-diascope, description of the, 
Pyrocatechine, on the formula of, 51. 
Quercitrine, on new derivatives of, 
48. 
Quincke (G.) on a new kind of electric 
current, 455. 
Quintics, on the theory of, 197, 272, 
331 
Rankine (W. J. M.) on the thermo- 
dynamic theory of steam-engines, 
460. 
Rays of same refrangibility, on the 
simultaneous emission and absorp- 
tion of, 193. 
Rochleder (Dr.) on fraxetine, 49. 
Roscoe (Prof.) on the chemical action 
of light, 61. 
Rose (Prof. H.) on the different states 
of silicic acid and the origin of 
granites, 32; on a new method of 
decomposing silicates, 382. 
Royal Institution, proceedings of the, 
238, 320. 
Royal Society, proceedings of the, 52, 
148, 224, 306, 391, 468. 
Rutile, on the cleavages of, 329. 
Salicylic acid, on the synthesis of, 
212. 
