692 I N t> E X; 
VapcurSy rifing from Volcanoes, pernicious to animati 
p. 16. 33. 41. Correfponding with fixt air, ibid. - 
Ventaroli^ cold fubterraneous winds, p. 35. 
VeJuviuSy a great channel, through which nature dis- 
charges fome foul humours of the earth, p. 11. its cone 
raifed by eruptions, p. 12. Heat of the ground on the 
mountain, p. 53. 
Virgin foil, none near Vefuvius, p. 13. 
Volcanoes owe their exiftence to fubterraneous fires, p. 2* 
Frequently throw up water mixed with the afhes, p. 9. 
the matter of their eruptions lies very deep, p. 29, 30, 
their fmoke contains a portion of electrical matter, p. 40. 
W. 
1 
Waring^ Richard Hill Efqj on indigenous plants of 
England, p. 359. 
Water thrown out by Mount Etna, and other volcanoes, 
,in the beginning of eruptions, p. 9. Boiling, rufhes 
out of the rock of Pifciarelli near the Solfaterra, p. 1 8. 
Water^ rarefied and turned into an elaftic fluid by eicClri- 
city, 675. 
Watfon, Profeffor Robert, on the effeCls of a remarkable 
cold, 213. 
Wilfon, Frofeflbr, account of a remarkable cold at 
Glalgow, p. 326. 
Winthrop^ Profeiior, his obfervation of the tranfit of 
Mercury in new England, p- 51. 
Wollajion^ Rev. Account of the going of his clock, p. 559. 
Some of his Aflronomical obfervations, p. 565. 
Woulfe^ Mr. Peter, experiments on the Aurutn Mofaicum, 
p. 114. Method of dying wool and filk of a yellow 
colour with indigo, p< 129. 
WeightSf Etrufean, deferibed by Mr. Swinton, p. 82. 87. 
Williams y 
