Index. 



419 



Platinum, fluate of, 337. 



Potash, fluate of, 332. 



Potash, silicated fluate of, composition of, 

 455. 



Potassium and oxygen, on an anomaly 

 presented by the combination of, 205. 



Powell, Mr. remarks on solar light and 

 heat, 81, 287 — on light and heat from 

 terrestrial sources, 1 56, 181. 



Prismatic spectrum, unequal distribution 

 of heat in, 235. 



Prout, Dr. on the nature of the acid of sa- 

 line matters usually existing in the sto- 

 machs of animals, 117. 



Prussic acid, effect of, on vegetation, 304. 



Pyroacetic spirit, on the properties of, 

 09. 



Pyro-electricity of minerals, and artificial 

 crystals, 469. 



Pyroxylic spirit, on the properties of, 69. 



R. 



Rain gauge, description of an improved 



one, !09. 

 Rochdale, extent of baize and flannel 



trade at, 3 1 6. 

 Rousseau, M. report of his memoir on a 



new method of measuring the powers of 



bodies to conduct electricity, 39. 



Sahlite, singular form of crystals of, 310. 



Salts, double, of fluoric acid, 339. 



Sandstone, old red, remarks on, 1 1 . 



Scrops, Mr. notice of his paper on the geo- 

 logy of the Ponza island, 65. 



Selenium, on the extraction of, from the 

 sulphureous deposits left in the manu- 

 facture of sulphuric acid from pyrites, 

 104. 



discovery of, in the volcanic 



rocks of Lipari, 150. 



■ an attendant of sulphur, 230. 



Semcntini, M. on iodous acid. 386. 



Seybert, Mr. analyses of chrysoberyls, 

 315. 



Silica, fluate of, composition of, 425. 



on the decomposition of, 121. 



Sillimanitc, description of, 315. 

 Silver, fluate of, 337. 



1 ore, red, analysis of, 29. 



Society, Astronomical, proceedings of, 

 64, 145. 



Geological, proceedings of, 05, 



465. 



■ Linnean, proceedings of, 63, 464. 



Royal, proceedings of, 03, 464. 



Smithson, .Mr. observations on Mr. Perm's 



theory concerning the formation of the 



Kirkdale cave, 50. 

 Soda and alumina, fluate of, 341. 



fluate of, 332. 



silicated fluate of, composition of, 



455. 

 Solutions, changes which certain, undergo 



by contact with the air, ascertained by 



electromagnetism, 42. 

 South, Mr. corrections in right ascension 



of 37 principal stars of the Greenwich 



catalogue, V3, 248. 

 Mr.W. on Mr. Battley's method 



of preparing morphia, 343. 

 Spirit, pyroacetic, on the properties of, 69. 



pyroxylic, on the properties of, 69. 



Sprudelstones, analysis of, 140. 



Stars, right ascension of 37, corrections 



in, 23, 248. 

 Steam-engines, on the advantages of high,, 



mean, and low pressure, 351 . 

 Steel, damasked, process for making, 



267. 

 Stomachs of animals, on the nature of the 



acid and saline matters usually existing 



in, 117. 

 on the nature of the free acid 



ejected from, 68. 

 Strontian, fluate of, 334. 

 Strychnia, salts of, volatility of, 384. 

 Substances, mineral, on the characters of' 



some, before the blowpipe, 36. 

 Subphosphuretted hydrogen gas, on, 247. 

 Sulphates of uranium, native, description 



of, 390. 

 Sulphuric acid of Saxony, on the, 259. 

 Sulphurous acid, anhydrous liquid, on the" 



production of, 307. 

 Surfaces, incapable of reflecting light, on, 



236. 



Table, meteorological, 78, 150,2*39, 319, 

 399, 473. 



Tallow, mountain, properties of, 1 55. 



Taschium, a supposed new metal, exami- 

 nation of, 149. 



Tellurium, new locality of, 231. 



Thomson, Dr. reply to M. Vauquclin's 

 remark on a supposed contradiction in 

 his System of Chemistry, 203 — on sub . 

 phosphuretted hydrogen gas, 247. 



Tide, extraordinary one, 234. 



Tin, fluate of, 337. 



Topham, Rev. J. analysis of his Epitome 

 of Chemistry, 60. 



Torry, Dr. on the columbite of Haddam, 

 359. 



Tourmaline, composition of, 73. 



Traill, Dr. on the action of iodine and 

 phosphorus, 1 54. 



Trinkets, gold, method of cleaning, 76. 



