INDEX TO VOL. VI. 



Acids, new ones, 355. 

 Adie, Mr, his meteorological observa- 

 tions, 192, 379. 

 Air, on its discharge by different orifices, 

 162. 



Air pump, on a new one without valves 

 or stopcocks, 133. 



Alcohol derived from the fermentation of 

 bread, 351. 



America, north-west coast of described, 

 51. 



Apophyllite, on a new form of, 363. 



Arts, society of for Scotland, proceedings 

 of the, 344. 



Audubon, J. J. Esq. on the carrion 

 crow, 15G — on the wild pigeon of Ame- 

 rica, 257 — his ornithology of the Unit- 

 ed States, 189. 



Aurora boreahs has no effect on the 

 needle, 167 — remarkable one described, 

 168 — Noise of observed by Hearne, 

 348. 



Baking, on the theory of, 73, 351. 



Balard, M. on brome, 177, 353. 



Barlow, Professor, on the effect of the 

 rotation of solid and hollow balls on 

 the needle, 6 — on the developement of 

 magnetism by rotation, 265 — on the 

 position of the plane of no deviation in 

 China, &c. 318. 



Barometer, on its great variation in 1822, 

 177. 



Baumgartner, M. on magnetising steel 

 needles by the sun's white light, 202. 



Beaver, on a remarkable extinct species 

 of, 328. 



Black colour, how to produce a fine one, 

 338. 



Blindness cured by an artificial pupil, 

 20. 



Boott, Dr, on the sea-serpent, 126. 



Boracic acid, on the light it emits when 

 separated into fragments, 1 76. 



Bory de St- Vincent, M. on the cochineal 

 insect in Spain, 326. 



Botany of South Africa, 366. 



Bowie, Mr James, on the botany of South 

 Africa, 366. 



Bowlders in America, with scratches and 

 iurrows, 364. 



Bread, on the art of baking it, 73, 351. 



Brewster, Dr, on the new fluid in sap- 

 phire, 155 — on the separation of epistil- 

 bite from Heulandite, 236 — on an im- 

 provement of the nautical eye-tube, 



250 — on the peculiar lustre of pearls * 

 277 — on the different crystalline forms 

 of the same body, 290 — on the struc- 

 ture of haytorite, 301 — his treatise on 

 mineralogy announced, 361. 

 Brisbane, Sir Thomas, on the tempera- 

 ture of the earth at Sydney, 226 — his 

 meteorological observations at Tort 

 Macquarie, 246. 



Brome, a new substance described, 177, 

 354. 



Buchanan, Dr, on a new air-pump, 133 



Buckland, Professor, on the cavern of 

 Lunel, 242. 



Calcareous deposits in pipes, how to pre- 

 vent them, 1 63. 



Caldwell, Professor, on the mean tern > 

 perature of Chapelhill, 249. 



Cambridge Philosophical Society, pro- 

 ceedings of, 343. 



Carbonic oxide gas, mode of preparing it, 

 350. 



Carburetted hydrogen, on a remarkable 

 decomposition of, 325. 



Carrion crow, on the habits of the, 1 56. 



Cavern of Planina described, 220 — of 

 Lunel, 242. 



Celestial Phenomena, 1 88, 375. 



Cerium, silicate of, 357. 



Chemistry, elements of, by Dr Turner, 

 analyzed and recommended, 338. 



Chlorides, alkaline, on their disinfecting 

 properties, 349. 



Christie, S. H. Esq. on the history of the 

 developement of magnetism by rotation, 

 95, — on magnetic influence in the solar 

 rays, 104. 



Cobalto- bismuth ic ore, 355. 



Cochineal insect, on its naturalization in 

 Spain, 326. 



Cold produced by mixing metals, 284. 



Colquhoun, Dr, on the art of baking 

 bread, 73, 351. 



Coloured rings produced by electro-chemi- 

 cal action, 313. 



Colladon, M. on the action of an electrical 

 machine on the needle, 149. 



Comets of 1825 and 1826, 175, 346— on 

 the rotation of one about its axis, 85. 



Compressibility of different fluids, 201. 



Compression of water with high degrees 

 of force, 267. 



Crystalline forms, notation for, 1. 



Crystals, on their regular composition, 

 278. 



