552 



INDEX. 



Spectra in highly rarefieil gases of 

 different kinds during the passage 

 of the electric discharge, on the, 

 7. 



Sphere, on the employment of the 

 guonionic projection of the, in 

 crystallograph)', 37- 



Spitzbergen, notes on, 153. 



Stadeler (G.) on the formula; of kap- 

 nicite and wavellite, 400. 



Stanethyle, researches on, 222, 383. 



Stannic, silicic, and zirconic acids, on 

 the isomorphism of, 262. 



Statistics, on the uniformity exhibited 

 iu tables of, 359. 



Steam, on the density of, 316. 



Steam-engines, on the thermody- 

 namic theory of, with dry saturated 

 steam, 71- 



Stokes (Prof. G. G.) on the bearing 

 of the phaenomena of diiFraction on 

 the direction of the vibrations of 

 polarized light, 428. 



Strecker (M.) on sarcine, 134; on 

 the artiiieial formation of xanthine, 

 135. 



Sullivan (W. K.) on the nature of 

 lactic fermentation, and on an ap- 

 parent conversion of caseine into 

 albumen, 203. 



Sulphoparabenzolic acid, 522. 



Tartaric acid, on the formation of, 

 from milk-sugar, 453. 



Tate (T.) on certain remarkable laws 

 relating to the cohesion of fluids, 

 335 ; on the resistance of glass 

 globes and cylinders to collapse 

 from external pressvire, 585. 



Telegraph wires, method of obviating 

 the elrcct produced by currents in, 

 induced by terrestrial currents, 

 339. 



Thermography, or the action of heat 

 considered as a means of produ- 

 cing images on sensitive paper, on, 

 78. 



Thomson (Prof. W.) on a simple ap- 

 paratus for observing atmospheric 

 electricity, 642. 



Trees, on the analytical forms called, 

 374. 



Vanadium, on the presence of, in the 

 clay of Gentilly, 480. 



Vertebrate animals, on the limbs of, 

 231. 



Vivianite, on, 182. 



Volpicelli (Prof.) on frictional elec- 

 tricity, 26. 



Walker (C. V.) on platinized gra- 

 phite batteries, 73. 



Wallace (Dr. W.) on the equivalent 

 of bromine, 279. 



Wanklyn (J. A.) on the action of 

 carbonic oxide on sodium-alcohol, 

 391 ; on the synthesis of acetic 

 acid, 584. 



Water, on the expansion of, at high 

 temperatures, 81 ; on the freezing- 

 point of, in capillary tubes, 105; 

 statement of facts relating to the 

 discovery of the composition of, by 

 the Hon. H. Cavendish, 141, 151. 



Wavellite, on the formula of, 400. 



Webb (Rev. T. W.) on traces of 

 eruptive action in the moon, 80 ; 

 on the structure of the tails of 

 comets, 479. 



Weekes (H.) on the coal-formatiou 



at Auckland, New Zealand, 475. 

 Willich (C. M.) on the angle of dock- 

 gates and the bee's cell, 427- 

 Wohler (Prof.) on the organic sub- 

 stance in the meteoric stone of 

 Kaba, 160 ; on the composition of 

 the Cape meteorite, 213 ; on the 

 preparation of metallic chromium, 

 455; on the magnetic oxide of 

 chromium, 457 ; on the preparation 

 of the bromide of chromium, ib. ; 

 observations on silicon, 458. 

 Wright (C. C.) on the sinking for 

 coal at the Shireoaks Colliery, near 

 Worksop, 77- 

 Wurtz (M.) on the constitution of 



lactic acid, 286. 

 Xanthine, on the artificial formation 



of, 135. 

 Zincethyle, researches on, 226. 



END OF THE EIGHTEENTH VOLUME. 



PRINTED BY TAYLOR AND FRANCIS, 

 RED LION COURT, FLEET STREET. 



