INDEX. 



557 



the quarters ending December 31, 



1849, and March 31, 1850, 110, 

 360; on the meteor of Feb. 11, 



1850, 221 ; 249, on the meteor of 

 Nov. 5, 1849, 381. 



Glaucolite, analysis of, 25. 



Glaukodote, analysis of, 23. 



Gold, experiments on the extraction 

 of, from its ores by the wet way, 1 ; 

 occurrence of, near Baltimore, 242 ; 

 of California, on the, 243. 



Graham (Prof.) on the diffusion of 

 liquids, 139. 



Gray (H.) on the development of the 

 retina and optic nerve, and of the 

 membranous labyrinth and audi- 

 tory nerve, 546. 



Gueymard (M.) on the discovery of 

 platina in the Alps, 323. 



Hail-storm of May 5, 1850, account 

 of the, 420. 



Hamilton (Sir W. R.) on quaternions, 

 or on a new system of imaginaries 

 in algebra, 305. 



Heat of combination, report on the, 

 511. 



Henry (T. H.) on francolite, 134. 



Hind (Mr. R. J.) on the past history 

 of the comet of Halley, 470. 



Hippuric acid, on the presence of, in 

 the blood, 158. 



Hofmann (IJr. A. W.) on the molecu- 

 lar constitution of the volatile or- 

 ganic bases, 540. 



Humboldt (M. Von) on the periodical 

 appearance of shooting stars from 

 the 13th to the 15th of November, 

 75. 



Humus, observations on, 481. 



Hunt (R.) on the application of elec- 

 tro-magnetism as a motive power, 

 550. 



Hydrodynamics, some observations 

 on a new equation in, 171, 295. 



Ice, on a remarkable exudation of, 

 from the stems of vegetables, 329. 



Ice-plant, on the watery secretion of 

 the leaves and stems of the, 377- 



Indian Archipelago, magnetic survey 

 of the, 542. 



Induction, researches on, 423. 



Iodine, existence of, in freshwater 

 plants, 486. 



Iron, cast, analysis of, 68. 



Jordan (L. A.) on smectite, 27. 



Kemp (A.) on an apparatus for regu- 



lating the heat produced by a gas- 

 burner, 483. 



Kestner (M.) on paratartaric acid, 78. 



Knoblauch (H.) on the deportment of 

 crystalline bodies between the poles 

 of a magnet, 178. 



Konichalcite, analysis of, 24. 



Lactic acid, on the action of nascent 

 chlorine on, 401. 



LeConte (Dr. J.) on a remarkable 

 exudation of ice from the stems of 

 vegetables, and on a singular pro- 

 trusion of icy columns from cer- 

 tain kinds of earth during frosty 

 weather, 329. 



Lefort (M.) on the equivalent of chro- 

 mium, 407. 



Lefroy (Capt.) on the observations of 

 the aurora borealis, 457. 



Lettsomite, chemical examination of, 

 100. 



Liebig (M. J.) on the separation of 

 certain acids of the series C°H°0'*, 

 402. 



Lies-Bodart (M.) on the dry distilla- 

 tion of camphorate of lime, Q7. 



Light under the action of magnetism, 

 observations on, 294 ; experiments 

 and observations upon the proper- 

 ties of, 466. 



Lightning, on the connexion of, with 

 the electricity of condensation, 103. 



Lime, observations on the estimation 

 of, 157. 



Liquids, on the diffusion of, 139. 



Lloyd (Rev. Dr.) on the recent storm 

 in Ireland, 395. 



Locke (Prof. J.) on the phantascope, 

 453. 



Lonchidite, analysis of, 24. 



Lyman (C. S.) on the gold of Cali- 

 fornia, 243. 



M'Ginn (T.) on a remarkable aurora 

 borealis, 545. 



Magnesia, fibrous hydrate of, analysis 

 of the, 552. 



Magnet, on the deportment of cry- 

 stalline bodies between the poles of 

 a, 178. 



Magnetic declination, on a method 

 for computing, 183. 



Magnetism, on the action of, upon 

 light, 294 ; terrestrial, on the pre- 

 sent state and prospects of the 

 science of, 311. 



Malaguti (M.) on the association of 



