INDEX. 



v. 



Vapour, aqueous in the atmofphere, 162 



Varenius, 5157 



Vauquelin, 280 



Vegetable, wax, plants which yield, 187. 

 —Qualities of, 188. —Method of col- 

 lecting in America, 189. — Soap and 

 candles made of it, 190, 192. — Ana- 

 lyfis of, 191. — Great utility of, 193 



Vegetation, how produced on new earth, 

 254 



Vehicles for philofophical papers, 74 



Ventenat, 188, 255 



Ventriloquifm, account of that exhihited 

 by M. Fitz-James 



Vinegar, aromatic, invented by Mr. 

 Henry, 215 



Voice, analyfis of the human, 158 



Volange, M. 203 



U. 



Undulations, utility of the doctrine of 

 combined, in explaining cotemporary 

 founds, 101. — And the tides, ib. 

 Unifons, imperfect, produce beats, 141 

 Uree, as examined by Vauquelin, not 

 pure, 280 



W. 

 Walker, Mr. E. on the light of candles, 



40. — His apparatus for conducting 



found, 69 

 Water, in finery cinder, 66. — Its power 



as a conductor of heat, 75.— Quantity 



carried off by rivers and evaporation, 



*59 



1- i n 1 1 cement, 60 



Watfon, Dr. 167 



"Wax, on the flexure of that of candles by 

 irregular cooling, 176 



■ 1 1 bees, comparifon between it and 

 myrtle wax, 133 



— — myrtle, nature and ufes of, 129.— 

 Analyfis of, 130.— Appears to be a 

 Tegctable fixed oil, 132.— Comparifon 

 of it with other matters, 133 



XND OF THE 



Wax, tree, memoir on, 18; 



— — vegetable, plants which produce, 

 187.— Qualities of, 188.— Method of 

 collecting in America, 189.— Analy 

 fis of, 191.— Soap and candles made 

 from, 190, 192.— Great utility of, 193 



Webfter, Mr. 107 



Weight, obfervations on the ftandard of, 



35 



Wheat, advantages of fteeping it previous 

 to fowing, 282. — Liming recommended, 

 ib. 



Wiegleb, 53 



Wilfon, Mr. W. on the electricity of 

 fhavings of wood, 49 



Winter fleep of animals, queftion on, 278 



W. N. his defcription of a joint applica- 

 ble to tubes ufed for conveying fleam, 

 107 



Wollafton, Dr. his method of examining 

 refractive and difperfive powers by prif- 

 matic reflection, 89.— On the oblique 

 refraction of Iceland cryftal, 148 



Wood, on the electricity of ihavings of, 

 49.— Danger of leaving it in the vici- 

 nity of phofphoric preparations, 217 



Woulfe's apparatus ^invented by Glauber, 6 



Y. 



Young, Adrian, 69 



Dr. his reply to Mr. Gough on 



grave harmonics, 72.— Account of his 

 harmonic Aiders, 101. Mr. Gough's 

 reply to him on the nature of mufical 

 founds, 153, — On fome cafes of the 

 production of colours not hitherto de- 

 fcribed, 180.— On the difperfion of co- 

 lours by refraction, 185 — On the dif- 



" perfive powers of the eye, 187 



Z. 



Zero, on the fuppofed determination of 



the real, 221 

 Zinc readily takes fire in fmall mafles, 



Zodiac, fociety formed for examining it, 

 146 



FOURTH VOLWM1V 



Printed by W.- Stratford, Crown-Court, TcmplciBar. 



