IXDEX. 



655 



Vesuvius, phenomena observed in the 



last eruption of, in 1828, 296. 



and Pompeii, account of, 554 . 



Village, lighted up by natural gas, 203. 

 Vision, contributions to the physiology 



of, 101,534. 

 of birds of prey, remarks on the, 



192. 



Vocal organs, affections of the, 565. 

 Voltaic pile, origin of the action of the, 



612. 



U. 



ULMIN, or ulmic acid, and azulmic acid, 

 account of, by M. Boullay, 179. 



Ulm minster, remarks upon the mode 

 of vaulting used at, 233. 



Ure, Dr., on gunpowders and detonating 

 matches, 121 mode of purifying 

 uitre, ibid. process used in France, 

 123 modes of refining sulphur, 126 

 charcoal most suitable for gun- 

 powder, 131 chemical examination 

 of gunpowder, 136 detonating 

 matches, 140. 



Urea, mode of preparing, by Berzelius, 

 401. 



W. 

 WALLICH'S, Dr., descriptions and figures 



of a select number of unpublished 



East India plants, 360. 

 .. numerical list of dried 



specimens of plants in the East India 



Company's Museum, 360. 

 Water, remark upon the report of the 



Commissioners on the supply of, to the 



metropolis, 41.. 



practical and philosophical ob- 

 servations on natural, 38. 

 resistance to, when moving in 



pipes, 157. 

 mode of regulating the supply 



of, -between rivulets and canals, 307. 

 on the discharge of a jet of, 



underwater, 368. 

 Waterspout on the lake of Neufchatel, 



200. 

 Wave, remarks upon the formation of 



a, 540. 

 Weather, Mr. Lyall's observations on 



the, at Madagascar, 47. 

 West, Mr., on natural waters, 38 water 



from peat lands, ibid. on the depo- 

 sition of sulphate of lime from hard 

 waters, 42 on the solvent powers of 

 waters, 43 on the gaseous contents 

 of waters, 44. 



Wheel animalculae, nature of the appear- 

 ance they present, 220. 



Whewell, Rev. W., on the employment 

 of notation in chemistry, 437 ad- 

 vantage of using symbols in chemis- 

 try, 438,439 objections to the foreign 

 system, 441 proposed system, with 

 examples, 442 remarks upon the let* 

 ters representing the elements of bo- 

 dies, 446, 447 list of symbols re- 

 commended, 450. 



written nomenclature for che- 

 mical compounds, 394. 



White-bait, experiments to preserve, 

 426. 



Wires, remarks upon the conducting 

 power of metallic, 36. 



Wittich, Mr., on the horns of the Prus- 

 sian elk, and American moose-deer, 

 118. 



Wittstock, M., on the manufacture of 

 sulphuric ether, 629. 



on columbine, a new vege- 

 table principle, 630. 



Wollaston, Dr., remarks upon his im- 

 provement of the galvanic battery, 33, 



Wood, mode of charring, at low tempe- 

 ratures, 397. 



change of colour in, 398. 



remarks upon the formation of. 



477. 



sorrel, remarks upon the, as the 



original emblem of Ireland, 454. 



Wool, on the means of improving, 192. 



Y. 



YARD and metre, proportion between the 



English, 599. 

 Yarrell's, Mr., experiments to preserve 



white-bait alive, 426. 

 Year, remarks upon the Egyptian, 462. 

 Yelloly, Dr., on calculous diseases, 346. 



Z. 



ZINC, action of mercury upon, 3. 



and sulphuric acid, on the relative 



action between, 388. 

 Zoology, 569. 



END OF VOLUME THE FIRST. 



London : Printed by W. CLOWES, Stamford-street. 



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