The base of the human skull, seen from above (in section) and below, with outline diagrams included beneath. Etching by Martin after J. Gamelin, 1778/1779.

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The base of the human skull, seen from above (in section) and below, with outline diagrams included beneath. Etching by Martin after J. Gamelin, 1778/1779. Wellcome Collection. Public Domain Mark. Source: Wellcome Collection.