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The Royal Society: Science in the Making

Paper, an account of the way of making English green copperas by Daniel Colwall

Reference number: CLP/9i/2

Date: 1661

Description

Concerns copperas stones or 'gold stones' [pyrite] found on the coast of Essex, Hampshire and further west, from which can be produced copperas [or 'green vitriol', a green, crystalline iron sulphate]. This process is described with reference to the innovative methods used at the copperas works of Sir Nicholas Crisp at Deptford where beds are constructed to produce the 'liquor' or 'vitriol' and siphon it into cisterns to be heated with iron, then cooled, to produce copperas.

Read to the Royal Society on 8 May 1661

Subject: Geology / Mineralogy / Industry

Reference number
CLP/9i/2
Earliest possible date
1661
Physical description
Ink on paper
Page extent
6 pages
Format
Manuscript

Creator name

Daniel Colwall

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Citation

Daniel Colwall, Paper, an account of the way of making English green copperas by Daniel Colwall, 1661, CLP/9i/2, The Royal Society Archives, London, https://makingscience.royalsociety.org/items/clp_9i_2/paper-an-account-of-the-way-of-making-english-green-copperas-by-daniel-colwall, accessed on 14 October 2024

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https://makingscience.royalsociety.org/items/clp_9i_2/paper-an-account-of-the-way-of-making-english-green-copperas-by-daniel-colwall

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  • Classified Papers

    Dates: 1592-1741

    The 'Classified Papers' of the Royal Society are papers from British and international natural philosophers and scholars categorised according to subject areas.

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