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v tage, by making them into Spelter or Zink;arid I know, by Experience, that theSpelter which might be made of theseFlowers, or out of the Lead Ore, andLapis Calaminaris , is equal in Goodnessto that which is brought from the East In -4ies, and much superior to that whichcomes from Germany ; because the Ger-mans do not suffer these Flowers to robthem of so much Silver as they do here,find the Lead Ore which they use with theLapis Calaminaris, is very poor in Silver;and Silver, being one of the best compo-nent Parts, or richest Ingredient of Spelter,in regard of the great use there is made ofjt in fodering the noble, as well as otherMetals, that must certainly be the best,which has most Silver in its Composition.Another Instance is making Vitriol; forwhich Purpose abundance of Fossils liescattered here and there, as I have men-tioned, in many Places of Wales , and arefrequently buried among the Rubbish of theMines, where they remain intirely neg-lected ; ygt, if in the Possession of inqui-sitive and industrious People, would bemanufactured into white Vitriol to no smallAdvantage. Cobalt again would furnish uswith Stone-blue, and is found almost inall Lead Mines; but Things of this Na-ture are so numerous in this Country,

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