( 12 ) not becaufe it is the Dung of Sea-fowls, as many would have it underftood, but becaufe of it s admirable Virtue in making ploughed Ground fertile. It is light and fpungy } and that which is brought from the Ifland of- Iqueyque is of a dark grey Colour, like unto I obacco ground fmall. Although from other Iflands nearer Arica, they get a white Earth inclining to a fallow, ot the fame Virtue. It inltantly colours Water whereinto it is put, as if it were the belt Lye, and fmells very ftrong. T he Qualities and Virtues of this, and of many other Simples of the new World, are a large Field for ingenious Perfons to difcourfe philofophically upon, when they be " d the,r more to the fearching out of Truth than Riches. c H A P. v. Of Jukes ; and frjl of Alum. *p H E Compofitions within the Bowels of the Earth are iuch as either will melt, or will not melt. Thofe that will not melt are hard, and called Stones ; or being foft and caf.ly crumb ling into very fmall Parts, are called Earth 7 hofe that will melt, are either fuch as after they run, by the Force of the Fire be come folid and malleable j and thofe are’Me tals i or clfe fuch as do not obtain thofe Qua lities,