Four cultivars of pear (Pyrus communis cv.): entire fruits. Coloured etching by W. Clark, c. 1835, after Mrs. Withers.

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Four cultivars of pear (Pyrus communis cv.): entire fruits. Coloured etching by W. Clark, c. 1835, after Mrs. Withers. Wellcome Collection. Public Domain Mark. Source: Wellcome Collection.