( i6 ) in thefe Provinces doth not correfpond there with. It is ordinarily found with Copper, and in great Abundance with the black Metal, which alfo participates much of it, and thence takes the ill Smell it hath in working. It is a very fine Sort of Copperas, which the Spaniards call Copaqitiras; and the beft and pureft of all, is that they call Piedra Lipas, from the Mine of it found in that Pro vince ; although a few Years ago a very plen tiful Mine of it hath been difcovered in the Province of Acaiama, which is of a greenifh Colour, and that of Lipa is blew. There is alfo whitifh and yellow Copperas, which the Painters ufe ; and different Colours of it have caufed feveral Names to be given it : Of this Mineral are thofe the Spaniards call Myft Sori Calohitis, and Melanteria. There is difpute enough about it’s Tempe rament and Qualities, as well as about that of Allum ; fome not allowing it to be hot in the third Degree, will yet allow it to be fo in the fourth : And others on the contrary, are of the Opinion of Juan de Rupee ijfa, (who I think follows Raymundus) that it is cold in the third Degree. It is admirable to fee it’s Effeft in Aqua finis, (in which all Metals, like Salt, diffolve and are turned into Water) and an ocular Demonftration of the Poilibility of the Tranfinutation of Metals one into another : For with Copperas diffolved in Aqua Fort is, without any other Artifice, Iron, Lead and Tin become fine Copper: And Silver will lofe of it’s Value, and be turned into Copper alfo