INDEX. 



Vauquelin, M, his experiments on 



the various species of cinchona, 106, 



203 

 Veins of minerals divided into two 



orders, 318 

 Vesta, observations on the planet so 



called, 259, 264 

 Vince, Mr. remarks on his pamphlet 



respecting the cause of gravitation, 



304— Answered by the author, 344 

 Vogel, 17 

 Volcano, extinct, in Britain, account 



of one, 237 

 Voha's pile, experimental observations 



on, 54 



Urine, analysis of, 67 

 Ursa Major described, 1 

 ■ ■ ■■■ Minor described, 2 



W. 



Walker, P. Esq. 318 



Ware, Mr. on the cataract of the eye, 



100, 105 

 Wasps, economy of, 256 

 Water, camphorated, 26 

 Water-proof leather, receipt for making, 



335 

 Werner, Professor, 518-— Observations 



on his silex schistosus politorius poli- 



erschiefer, 380 

 Wernerian Natural History Society at 



Edinburgh, 317 

 Whale, stomach of the, on the structure 



of the different cavities of which it 

 is constituted, 348 



Wheat, blight in, 338 



Wilka, 17 



Wilke, M. 48 



Willow bark compared with that of 

 Peru, 120 



Wines made for family use, improve- 

 ments in, 353 



Winter, Mr. R. on a method of finding 

 the specific gravity of light, and his 

 defence of the undulatory system, 

 143 



Withering, Dr. on fairy rings, 368 



W. N. on albinoes, 84— On Dr. Craw- 

 ford's theory of heat, 202 — On find- 

 ing a substitute for tobacco for the 

 purpose of destroying insects, 301 



Wollaston, Dr. his improvements hi 

 electricity, 43, 44-*On fairy rings, 

 367 



Wood, decay of, inquiry into the causes 

 ' of, and the means of preventing it, 

 328 



Wright, Dr. 318 



Y. 



Young, Dr. his experiments favourable 

 to the undulatory system of light, 

 143 



Z, 



Zinc, malleable, uses to which it may 

 be applied, 1 1 



END OF THE NINETEENTH VOLUME. 



Stratford, Printer, Crown Court, Temple-Bar. 



