INDEX. 



Warltirc's fire ball, 90 

 Water, compoJitJon ofj 223.— Temper- 

 ature of, furrounded by free ring mix- 

 tures, I'Sp.— Temperature at vrhich 

 it is of greateft denfity, 377 

 Water rifing behind a dam, prize queftion 



refpediing, 185 

 Water-fpout in the territory of Revel, 370 

 Wedgwood's table of fufibilities, 340 — , 



His manufadory, 381. 

 Weights of the particles of bodies, table 

 of, 300 

 '•White Sea, chart of, 188 

 Whitehurft, Mr. 290 

 Wilna, univcrfity of, prizes propofed by, 



184 

 Wilfon, Rev. Jonathan, on fairy rings, i 

 Winter, Mr. jjn the utility of fcientific 

 periodical publications, 72.— On the 

 heat produced by a hiaft of air from bel- 

 lows, 73 

 Wifniewflci, M. employed at the obfer- 



vatory of Peter{burgh, 275 

 W. N. on the modification of found by 

 means of folid bodies, 52.— On the di- 

 ujj^sl variations of barojijetcrs between 



the tropics, 58.— Coiijefture by coni 

 cerning the cattfc of two interfering 

 rainbows, defcribed by Profeflbr Play- 

 fair, 76.— On the claim of Lavoifier to 

 the invention of the modern fyftem of 

 chemiftry, 85.— On the luminous phe- 

 nomena of eleflricity, 87. — His newly 

 invented fecret lock with 6561 combi- 

 nations, 158.— On the temperature of 

 air blown from bellows, i7a.^To cor- 

 refpondcnts, 372 



Wollafton, Dr. on the difcovery of pal- 

 ladium, &c, 117 



Wreftlcrs, &c. training of, 309 



V. 



Young, Dr. T. his claim to the lamp de- 

 fcribed by A. F. 277 



Z. 



Zach, Baron de, extract from his journal, 



J87, 276 

 Zoega, M. iijs catalogue of Coptive MSS, 



in the Borghefe mufeum, 9Z 



THt END or THS THIKTEENTH VQLUMfc;. 



Printed by W. Stratford, Crown-Court, Temp'ifi-Bar,, 



