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Balls presents 'a description of the final form of apparatus and method by which the moisture content of a cotton sample can be determined with much less accuracy than by the oven-test, but in five minutes only. Its accuracy is shown to be good enough for transactions on country cotton.' He notes that trials on the apparatus have been 'interrupted by the war'.

Annotations in pencil and ink throughout. Includes seven diagrams of experimental apparatus and results. Includes a table of contents.

Subject: Chemistry

Reference number
Earliest possible date
Physical description
Ink and graphite pencil on paper
Page extent
30 pages

Creator name

William Lawrence Balls

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William Lawrence Balls, Unpublished paper, 'Cotton - air - moisture testing (the CAM-test)' by W [William] Lawrence Balls, 1939-1944, AP/81/1, The Royal Society Archives, London,, accessed on 20 July 2024

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  • Archived Papers

    Dates: 1768-1989

    The 'Archived Papers' collection is comprised of original manuscript scientific papers and letters submitted to the Royal Society which remained unpublished or were abstracted in the journal 'Proceedings of the Royal Society' published from 1830 onwards.

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