Page:Theophrastus - History of Stones - Hill (1774).djvu/59

 XVIII. Some few of thee Stones there are, which are ubject to the Force of Fire, and may be burnt. Thee hall be firt treated of, in Conideration of what their Differences are.

XIX. In regard to the Action of Fire on them, ome are fuible, and melt by it; as the metalline Kinds. For the Stones, which partake of the Nature of Metals, as Silver, Copper, or Iron, melt in the Furnaces with them; either