On an improved optometer for estimating the degree of abnormal regular astigmatism / by John Tweedy.

  • Tweedy, John, 1849-1924.
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[1876]
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On an improved optometer for estimating the degree of abnormal regular astigmatism / by John Tweedy. Public Domain Mark. Source: Wellcome Collection.

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This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)

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[London] : [publisher not identified], [1876]

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4 pages : illustrations ; 23 cm

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Reprinted, with additions and corrections, from The Lancet, Oct. 28, 1876

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This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)

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