The brain seen from the underside, sectioned horizontally; with attention to the part associated by Hollander's system of phrenology with memory for numbers. Process print, 1901, after etching, 1809.

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The brain seen from the underside, sectioned horizontally; with attention to the part associated by Hollander's system of phrenology with memory for numbers. Process print, 1901, after etching, 1809. Attribution 4.0 International (CC BY 4.0). Source: Wellcome Collection.