Historical Notes on the Patio Process

THE text for this contribution to the history of the Patio process is a page taken from a Spanish manuscript of Bartholomé Arzaj Sanches y Uela, now in the possession of the library of Brown University (see Figure 1). I owe the photographic print to the courtesy of the librarian. The date, as will be seen, is 1577. The subject is the treatment of silver ores at Potosî, in old Peru, but in modern Bolivia.
Keywords: Mercury, Mercury, millstone, ore, Part of Peru, quicksilver, Mine, Mines, Ore, Ores, Silver, Water, Waters
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