472 



INDEX. 



Titanium, ammoniacal deutochloride 

 of, 388. 



Torsion balances, 58. 



Turner (Dr.) chemical examination of 

 wad, 75 ; on chloride of barium, 181. 



Ulmin (ulmic acid) and azulmic acid, 

 226. 



Unio, observations on the genus, 376. 



Ure's (Dr.) analysis of gunpowder, 384. 



Urine, butyric acid in, 297. 



Valtz's elements of the comet in Pe- 

 gasus, 51. 



Vaporization, limits to, 383. 



Variations, on the calculus of, 321. 



Vegetable products, analysis of, 386. 



Vegetable fossils, 16; organic texture 

 of, 76. 



Volcanoes in the Island of Teneriffe, 

 198. 



Wad, chemical examination of, 75. 



'Water, quantity of afforded by springs, 

 58 ; decomposed by galvanized wires 

 separated from the galvanic pile, 229 ; 

 discharge of a jetof, underwater, 342. 



Waterspout, 26. 



Watts's steam-engine, 306. 



Weaver (T.) on the geology of the 

 south of Ireland, 147. 



Westwood (J. O.) upon the genus 

 Paussidae, 62. 



Witham (H.) on the vegetable fossils 

 found at Lennel Braes in Berwick- 

 shire, 16. 



Wood, alteration of the colour in, by 

 oxygen, 224; charring of, at low 

 temperatures, 383. 



Woolf 's steam-engine, 305. 



Yarrell's ( W.) reply on the discovery of 

 Cygnus Bewickii. 



Zinc, action of sulphuric acid on, 298, 



END OF THE EIGHTH VOLUME. 



At ERE ft FLAM MAM 



LONDON: 



PRINTED KY RICHARD TAYLOR, RED LION COURT, FLEET STREET. 



1830. 



7> 



4155 



fj^r7. so, is- - 



