The preparation of nitre (saltpetre) unknown
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The preparation of nitre (saltpetre)
This plate forms part of Johann Rudolf Glauber's treatise on 'The Prosperity of Germany', and illustrates various stages in 'the Preparation of Salt-petre' (nitre). The two images at the top show 'the manner of Boiling Salt-petre, and ... by what means a Lixivium is to be made out of a Nitrous Earth', according to the methods of another German chemist, Lazarus Ercker. The lower image shows the preparation of the 'Lixivium' of saltpetre from horse dung or the leaves of trees. Plate facing p.339 in the book The works of the highly experienced and famous chymist, John Rudolph Glauber, containing great variety of choice secrets in medicine and alchymy ... (English translation by Christopher Packe, London, 1689).
Original: engraving. 1689
- Image reference: RS-10420
- The Royal Society
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