Hermann Ludwig Ferdinand von Helmholtz. Stipple engraving by C. H. Jeens, 1871.
- Date:
- 1871
- Reference:
- 4125i
Licence: Public Domain Mark
Credit: Hermann Ludwig Ferdinand von Helmholtz. Stipple engraving by C. H. Jeens, 1871. Wellcome Collection. Source: Wellcome Collection.
![no text alternative](https://iiif.wellcomecollection.org/image/V0002675/full/800%2C/0/default.jpg)