Page:Theophrastus - History of Stones - Hill (1774).djvu/83

 XXIX. There is alo found in the Mines of Scapteylæ a Stone, in its external Appearance omething reembling rotten Wood; on which, if Oil be poured, it burns; but when the Oil is burnt away, the burning of the Stone ceaes, as if it were in itelf not liable to uch Accidents.

XXX. Thee then are the Differences of the Stones which are ubject to the Force of Fire.

XXXI. But there is another Kind of Stone, formed, as it were, of contrary Principles, and entirely incombutible :