Julius Robert von Mayer. Wood engraving by Hummel, 18--.

  • Hummel, wood-engraver.
Date:
[between 1800 and 1899]
Reference:
658046i

Licence: Public Domain Mark

Credit: Julius Robert von Mayer. Wood engraving by Hummel, 18--. Wellcome Collection. Source: Wellcome Collection.

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