548 



INDEX. 



mixture of red prnssiate of potash and 

 caustic alkali upon, 126. 



Comet of 1264 and 1556, on the expected 

 reappearance of the, 50. 



Commutators, remarks on, 241. 



Connell (A.) on the precipitate produced 

 in spring and river waters by acetate 

 of lead, 122 ; on the sulphato-chloride 

 of copper, 537. 



Continuity, on the principle of, 137. 



Copernicus, on the opinion of, with re- 

 spect to the light of the planets, 528. 



Copper, on the sulphato-chloride of, 536. 



Cotton, detection of, in linen, 157. 



Couper (R. A.) on the chemical compo- 

 sition of the substances employed in 

 pottery, 435. 



Creatine, observations on, 236. 



Cuminate of ammonia, on the products 

 of the decomposition of, 459. 



Daubeny (Prof.) on active and extinct 

 volcanoes, 399. 



De la Rive (A.) on the voltaic arc, 321. 



De la Rue (W.) on a modification of the 

 apparatus of Varrentrapp and Will for 

 the estimation of nitrogen, 156 ; on 

 cochineal {Coccus cadi), 471. 



De Morgan (Prof.) on the structure of 

 the syllogism, and on the application 

 of the theory of probabilities to ques- 

 tions of argument and authority, 130; 

 on the opinion of Copernicus with re- 

 spect to the hght of the planets, 528. 



Domeyko (M.) on vanadiate of lead and 

 copper, 319. 



Doveri (M.) on some properties of silica, 

 315. 



Drach (S. M.) on eliminating the signs 

 in star-reductions, 251. 



Dumas (M.) on the action of anhydrous 

 phosphoric acid on ammoniacal salts, 

 544, 



Durocher (M.) on the extraction of silver, 

 317. 



Earth, on the amount of radiation of heat 

 from the surface of the, at night, 69 ; 

 on the determination of the mean den- 

 sity of the, 73. 



Ebelmen (M.) on the artificial production 

 of minerals, and especially of precious 

 stones, 311; analysis of kupfernickel, 

 314; analysis of gray copper from Al- 

 geria, 313. 



Elastic medium, on the symbolical equa- 

 tion of vibratory motion of an, 376. 

 Electric telegraph, on the determination 

 of differences of longitude by means of 

 the, 338. 

 Electro-magnetic influence on flame and 



gases, 401, 421, 

 Equations, on the solution of linear dif- 



ferential, 372; monogenous, observa- 

 tions on, 467. 

 Euler's theorem, notice in reference to 



the extension of, 123. 

 Faraday (Prof.) on the diamagnetic con- 



ditions of flame and gases, 401. 

 Field (F.) on the products of the decom- 

 position of cuminate of ammonia by 

 heat, 459. 



Figuier (M.) on the preparation and com- 

 position of lignine, 397. 



Flame, on the diamagnetic conditions of, 

 401, 421. 



Flax, on the chemical composition of the 

 ashes of, 36, 105. 



Fluid motion, on some cases of, 136. 



Fluxions, on the invention of, 35. 



Forster's (T. J, M.) memoir on meteors 

 of various sorts, notice of, 219. 



Frankland (E.) on the chemical constitu- 

 tion of metacetonic acid, and some 

 other bodies related to it, 266. 



Fremy (M.) on the gelatinous substances 

 of vegetables, 389. 



Fritzsche (J.) on the preparation and pro- 

 perties of osmiamic acid and some os- 

 miamates, 534. 



Galloway (R.) on the water of the ther- 

 mal spring of Bath (King's bath), 

 56. 



Galloway (T.) on the proper motion of 

 the solar system, 74. 



Galvanic couples, account of some experi- 

 ments with, 350. 



Gases, on the re-absorption of mixed, in 

 a voltameter, 72 ; on the diamagnetic 

 conditions of, 401, 421. 



Geometry, on a new notation for express- 

 ing various conditions and equations 

 in, 134; contributions towards a system 

 of symbolical, 139. 



Gladstone (J. H.) on the chemical history 

 of gun-cotton and xyloidine, 519. 



Glaisher (J.) on the amount of the radia- 

 tion of heat, at night, from the earth, 

 and from various bodies placed on or 

 near the surface of the earth, 69 ; on 

 the Aurora Borealis, as it was seen on 

 Sunday evening, Oct. 24, 1847, 369. 



Gregory (Dr. W.) on the preparation of 

 hippuric acid, 127. 



Griffith (Dr. J. W.) on the composition of 

 the bile of the sheep, 366. 



Grove (W. R.) on certain phsenomena of 

 voltaic ignition and the decomposition 

 of water into its constituent gases by 

 heat, 20, 91, 96 ; correlation of physical 

 forces, noticed, 67. 



Gruner (M.) on bisilicate of iron or fer- 

 ruginous pyroxene, 78. 



Gun-cotton, history of the discovery of, 



