Preparation des liquides utilises pour extraire le minerai d'argent de celui de l'or - Gravure...

Preparation des liquides utilises pour extraire le minerai d'argent de celui de l'or - Gravure extraite de Description des minerais et des principales methodes d'exploitation miniere, de Lazarus Ecker, 1580 - Raw Materials Processing, Metallurgy Preparation of the liquid used to extract silver from gold, 1580. Woodcut illustration from 'Beschreibung aller furnemisten mineralischen Ertzt vnnd Bergtwercks arten' ('Description of the Principle Mineral Ores and Methods of Mining') by Lazarus Ercker (d 1594) published in Frankfurt-am-Main in 1580. In 1554 Ercker was appointed assayer at Dresden and later became a control tester of coins. This book is a mine of information concerning sixteenth century metallurgy and assaying. It can be regarded as the first manual of analytical and metallurgical chemistry. ©SSPL/Science Museum