Isaac Swainson promoting his 'Velnos syrup', facing an onslaught of rival practitioners advocating mercury. Coloured etching by T. Rowlandson, 1789.
- Rowlandson, Thomas, 1756-1827.
- Date:
- 29 November 1789
- Reference:
- 10779i
Licence: Public Domain Mark
Credit: Isaac Swainson promoting his 'Velnos syrup', facing an onslaught of rival practitioners advocating mercury. Coloured etching by T. Rowlandson, 1789. Wellcome Collection. Source: Wellcome Collection.
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