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Washing ore to extract gold, 1683. Artist: Unknown
HRM19B65_439

Washing ore to extract gold, 1683. Artist: Unknown

Athanor or 'Slow Harry', a self-feeding furnace maintaining a constant temperature, 1683. Artist: Unknown
HRM19B65_440

Athanor or 'Slow Harry', a self-feeding furnace ma...

Furnace for processes where protracted heat required, such as cementation, 1580. Artist: Unknown
HRM19B65_435

Furnace for processes where protracted heat requir...

Assayer testing samples of gold or silver using a balance, 1683. Artist: Lazarus Ercker
HRM19B65_043

Assayer testing samples of gold or silver using a ...

Distillation of Nitric Acid, 1683. Artist: Unknown
HRM19B65_442

Distillation of Nitric Acid, 1683. Artist: Unknown

Athanor or 'Slow Harry', a self-feeding furnace maintaining a constant temperature, 1683. Artist: Unknown
HRM19B65_441

Athanor or 'Slow Harry', a self-feeding furnace ma...

Preparation of copper and silver to be alloyed for production of coins, 1683. Artist: Unknown
HRM19B65_147

Preparation of copper and silver to be alloyed for...

Checking the quality of saltpetre (nitre, potassium nitrate, or KN03), 1683. Artist: Unknown
HRM19B65_446

Checking the quality of saltpetre (nitre, potassiu...

Crystallization of saltpetre (nitre, potassium nitrate, or KN03), 1683. Artist: Unknown
HRM19B65_447

Crystallization of saltpetre (nitre, potassium nit...

Laboratory for refining gold and silver, showing typical laboratory equipment, 1683. Artist: Unknown
HRM19B65_444

Laboratory for refining gold and silver, showing t...

Production of saltpetre (nitre, potassium nitrate, or KN03), 1683. Artist: Unknown
HRM19B65_445

Production of saltpetre (nitre, potassium nitrate,...