INDEX. 



551 



Saturn, on an important error in Bou- 

 vard's tables of, 143. 



Schcenbein (Prof.) on the discovery of 

 gun-cotton, 7 ; on a new test for ozone, 

 176. 



Schunck (Dr.) on the colouring matters of 

 madder, 46. 



Silica, observations on, 315. 



Silicium, on the chlorosulphuret of, 78. 



Silver, on the extraction of, 31 7 ; solu- 

 bility of the chloride of, in muriatic 

 acid, 398. 



Slatter (Rev. J.) on the meteor of Sep- 

 tember 25, 1846, 368. 



Smith (Mr. A.) on the hydrates of nitric 

 acid, 454. 



Smyth (Prof. C. P.) on the properties of 

 rock as a foundation of the piers of 

 meridian instruments, and on the de- 

 tection of a cause of error in the Edin- 

 burgh transit, 531. 



Sobrero (M.) on nitric mannite, 316. 



Soils and waters of the flax districts of 

 Belgium, on the composition and cha- 

 racters of, 36, 105, 



Solar system, on the proper motion of the, 

 74. 



Sound, on the theoretical velocity of, 114. 



Spinelle, on the artificial production of, 

 312. 



Star-reductions, on ehminating the signs 

 in, 251. 



Stas (M.) on the action of chlorine on 

 alcohol — formation of acetal, 77. 



Stokes (G. G.) on some cases of fluid mo- 

 tion, 136; on the theory of oscillatory 

 waves, 138. 



Storms, observations relating to the laws 

 of, 338. 



Struve (H.) on the preparation and pro- 

 perties of osmiamic acid and some os- 

 miamates, 534. 



Sugar, analyses of the ashes of rough 

 brown, 336. 



Sulphocyanide of ammonium, simple me- 

 thod of preparing, 146. 



Sulphuric acid, on the dehydration of, 

 314. 



Sulphates, on the measurement of some 

 double, 540. 



Syllogism, on the structure of the, 130. 



Sylvester (J. J.) on a discovery in the 

 theory of numbers relativatj^o the equa- 

 tion kx^+By^ + Cz^^Bayz, 189, 

 293 ; on the general solution (in certain 

 cases) of tbe equation or^+J/'+A^^ 

 = M xyz, &c., 467. 



Taylor (R.) on the invention and first in- 

 troduction of Mr. Koenig's printing- 

 machine, 297. 



Taylor (T.) on some improved forms of 



chemical apparatus, 393. 



Therault (M.) on the formation of valeri- 

 anic acid, 538. 



Thompson (L.) on chloric acid and the 

 chlorates, 510. 



Thomson (Dr. R. D.) on a test for arse- 

 niates, 258. 



Tin, on the preparation of the protoxide 

 of, 392. 



Titanium, on the equivalent of, 155. 



Tolene, composition of, 153. 



Topaz, on the modification of the doubly 

 refracting and physical stmcture of, 

 101 ; on the crystals in the cavities of 

 the, 504. 



Triton, on the number of British species 

 and mode of development of, 74. 



Tyrosine, on the properties and composi- 

 tion of, 496. 



Ulrich, Mr,, on the formation and appli- 

 cation of fine metallic wires to optical 

 instruments, 531. 



Urine of the calf and the sheep, compa- 

 rative analysis of the, 49. 



Valerianic acid, on the decomposition of, 

 by the voltaic current, 348 ; on the for- 

 mation of, 538. 



Vapours, on the heat of, 90. 



Veall (S.) on a means for promoting the 

 science of meteorology, 238. 



Vegetables, on the gelatinous substances 

 of, 389. 



Voltaic arc, researches on the, 321. 



battery, description of a new, 81. 



current, on the decomposition of 



valerianic acid by the, 348. 



ignition, on certain phaenomena of, 



20, 91. 



Voltameter, on the reabsorption of mixed 

 gases in a, 72. 



Wagner (M.) on the solubility of common 

 salt in alcohol, 393. 



Walter (Mr. John), false statements in 

 the Times newspaper and Mechanics* 

 Magazine concerning him as regards 

 Koenig's printing-machine, 297. 



Warburton (H.) on the partitions of num- 

 bers, on combinations, and on permu- 

 tations, 301. 



Warington (R.) on the means of testing 

 the comparative value of astringent 

 substances for the purposes of tanning, 

 150. 



Wartmann (Prof.. E.) on induction, 241. 



Water, decomposition of, by heat, 20, 91 ; 

 on the decomposition of, by platinum, 

 177. 



Waves, oscillatory, on the theory of, 138. 



Weddle (T.) on asymptotic straight Unes, 



