INDEX. 



V. 

 Tallfit, 58 

 Vauquelin, M. his analysis of yenite, 



144— Of some varieties of steatite, 



or talc, 170 

 Vegetables, wild, improved by culture, 



168 

 Vince, Professor, on gravitation, 114, 



222, 276 



U. 



Urinary calculus, analysis of, 31 7j 



W. 



Walker, Mr. his account of the birds 

 that frequent the vicinity of Edin- 

 burgh, 157 

 Walker, P. Esq. 319 

 Warltire, on fire-balls, 82 

 Water heated by friction, 113 

 Watson's electrical experiments, 82 

 Werner, M. 105, 155 



Wernerian Society of natural historr, 

 78, 157, 238, 318 



Westrumb, Mr. 238 



Winn, Mr. on the aurora borealis, 87 



W. N. on the construction of a curb 

 affording a compensation for the ef- 

 fects of heat and cold in time-pieces, 

 by Mr. Wm. Hardy, lS8--0n the 

 cause of animal heat, 201 — On the 

 ignition of tinder by compressed air, 

 278 



Wood, decay of, inquiry into the causes 

 of, and the means of preventing it, 

 69, 102 



Woodward, Mr. 323 



Wright, Mr. description of his port- 

 able artificial horizon, for taking al- 

 titudes by sea or land, 279 



Wurzer, Professor, his analysis of an 

 urinary calculu.s, 317 



Tenite, description and analysis of, 13^ 



EKJ) O? THE TWEXTIETH VOLUMX, 



Stratford, Printer, Crown-Court, Temple-JBar,. 



