Berckwercksarten

Smelting of copper: making liquation cakes by

Assayer testing samples of gold or silver using

Assay laboratory for gold and silver

Assaying of silver in 1574. Copperplate engraving

Assaying copper in 1574. Copperplate engraving

Roasting gold ore in order to recover the precious

Assaying: Various muffles used in assay ovens

Smelting copper. From a 1683 Prague in 1574. Copperplate

Refining of silver, in Prague in 1574. Copperplate

Refining gold in Prague in 1574. Copperplate engraving

Purification of silver in a muffle furnace. 1574

Assay laboratory with various forms of furnace

Assaying copper and lead: prepared and weighed ore

Recovery of gold from amalgum 1574. Copperplate engraving