Washing ore to extract gold. Water is fed into

Washing ore to extract gold. Water is fed into a sieve containing crushed ore. Solution containing ore in suspension is fed along collecting pans, often lined with dark woollen cloth. Gold, being the heaviest ingredient, separated out on the way. From 1683 English edition of Beschreibung allerfurnemisten mineralischen Ertzt, Lazarus Ercker, (Prague, 1574). Copperplate engraving

1574 1683 Allerfurnemisten Beschreibung Collecting Containing Crushed Ercker Ertzt Extract Extraction Heaviest Ingredient Lazarus Mineralischen Often Pans Separated Sieve Solution Suspension Woollen

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