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Blast furnaces, 1683
 
Refining copper using the Hungarian process, 1683
 
Assayer testing samples of gold and silver, 1683
 
Washing ore to extract gold, 1683
 
Smelting of copper, 1683
 
Washing ore to extract gold, 1683
 
Furnace for processes where protracted heat required, such as cementation, 1580
 
Athanor or Slow Harry a self-feeding furnace maintaining a constant temperature, 1683
 
Athanor or Slow Harry a self-feeding furnace maintaining a constant temperature, 1683
 
Distillation of Nitric Acid, 1683
 
Laboratory for refining gold and silver, showing typical laboratory equipment, 1683
 
Production of saltpetre (nitre, potassium nitrate, or KN03), 1683
 
Checking the quality of saltpetre (nitre, potassium nitrate, or KN03), 1683
 
Crystallization of saltpetre (nitre, potassium nitrate, or KN03), 1683