Ellipsograph patented 6 July 1875 in Washington

Made:: 1875-1885 in Baltimore

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Ellipsograph patented 6 July 1875 in Washington, D.C
Science Museum Group
© The Board of Trustees of the Science Museum

Ellipsograph patented 6 July 1875 in Washington, D.C. by Morton Toulmin and made by Watts & Co., Baltimore, Maryland, in walnut case with key

Details

Category:: Mathematics

Object Number:: 1988-734

type:: curve drawing instruments and ellipsographs

credit:: Tesseract

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