472 



INDEX. 



Siamese Twins, united, 450. 



Silver :— precipitate of, resembling the 

 purple powder of Cassius, 58 ; RF. 

 Weslar on some properties of, 58. 



Silvertop (Col. C.) on the lacustrine 

 basins of Baza and Alhama, 453. 



Skeletons of small fish, method of ob- 

 taining, 151. 



Smelting of iron, improvement in, 232. 



Societies, learned: — Royal Society, 33, 

 139, 206, 287, 353, 449; Royal Aca- 

 demy of Sciences of Paris, 50, 376 ; 

 Linnaean Society, 46, 206, 357, 459; 

 Geological Society, 48, 207, 289, 

 358, 452 ; Astronomical Society, 

 223, 361, 459; Roj'al Institution of 

 Great Britain, 21 1, 315; Royal Geo- 

 logical Society of Cornwall, 147; 

 Yorkshire Philosophical Society, 219. 



Soda and lime, carbonates of, native 

 compounds of, 389. 



Space and time, tables for the conver- 

 sion into each other, 31. 



Spring water, on the presence of iodine 

 &c. in, 9, 10. 



Steam-boats, new paddle-wheel for, 96, 

 408. 



Steam, elastic power of, 235. 



Steam-Engines of Cornwall, on, 152, 

 323, 421 424, 449. 



St.-Hilaire and Cuvier on the unity 

 of organization in animals, 379. 



Succulent plants, new, 106. 



Sulphuret of carbon :-decomposition of, 

 by electricity, 6 ; crystallized, elec- 

 trical formation of, 226. 



Swan, wild, new species of, 146 ; spe- 

 cific characters of Cygnus Bewickii, 

 and C. Ferus, 194. 



Tannin and gallic acid, distinctive cha- 

 racters of, 58. 



Taylor (J.) on the duty of steam-en- 

 gines in Cornwall, 423. 



Telescopes,on Guinand's glassfor,351. 



Thames water, on the purification of, 

 268. 



Thomson (Dr.), experiments on gold, 

 460. 



Thorina and thorinum, 388. 



Tides in the port of London, Mr. Lub- 

 bock on, 124 ; spring tides, on, 464. 



Time and space, tables for their conver- 

 io each other, 31. 



Tulley's achromatic microscope, 353,_ 



Turner (Dr.) on a specimen of varvi- 

 cite, 284. 



Ultramarine, artificial, on, 244. 



Ulva marina, manufacture of paper 

 from, 236. 



Unity of plan and of composition in 

 animals, 382. 



Utzschneider (M.) on Guinand's glass 

 for telescopes, 351. 



Ure's New System of Geology, Prof. 

 Sedgwick on the errors of, 310. 



Valleys, on the excavation of, 210,293. 



Varvicite, Dr. Turner on, 284. 



Vegeto-alkalies, new, 233, 461. 



Vernon (Rev. W. V.), further exa- 

 minationof the fossils bones at North 

 Cliff, 1 ; examination of a crystalline 

 substance from the zinc-foundry at 

 Filisur, and experiments on some 

 ancient glass beads, 401. 



Wartmann (Mr.) observations on the 

 Comet in Pegasus, 446. 



Water : — spring, on the presence of 

 iodine &c. in, 9, 10 ; Thames, on 

 the purification of, 268 ; and carbo- 

 nic acid, action of metals on, 317. 



Weymouth, on the geology of, 454. 



Williams (K.) on a new paddle-wheel, 

 96 ; Mr. E. Galloway on, 408. 



Witham (H.) on the vegetation of the 

 first period of the world, 23 ; some 

 further remarks by Mr. Pattinson, 1 85. 



Wolf's steam engines, 421, 424. 



WoUaston (Dr. W. H.), a short ac- 

 count of his discoveries, 34, 22S. 



Yarrell, (W. ) on a new species of wild 

 swan, 146 ; specific characters of 

 Cygnus Bewickii, andC. Ferus, 194. 



Young (Dr. T.), short account of the 

 scientific labours of, 35. 



Yorkshire Philosophical Society, and 

 New Museum, 213. 



Z., on Mr. De la Beche's classification 

 of European rocks, 189. 



Zinc, chromate of, as a pigment, 60. 



Zoology : — new species of wild swan, 

 146; specific characters of Cygnus 

 Bewickii, and C. ferus, 194 ; on the 

 unity of organization in animals, 

 379 ; Fleming's dichotomous sys- 

 tem, 430. 



tr>">:' 





K 



END OF THE SEVENTH VOLUME. 



LONDON : 



PTiNTED »y RiCHARn TAri-OR, hed lion court, fleet street. 



1830. 



