Hydraulic mechanical toy, 1657.
Licence: Public Domain Mark
Credit: Hydraulic mechanical toy, 1657. Wellcome Collection. Source: Wellcome Collection.
![no text alternative](https://iiif.wellcomecollection.org/image/L0006093/full/800%2C/0/default.jpg)
Licence: Public Domain Mark
Credit: Hydraulic mechanical toy, 1657. Wellcome Collection. Source: Wellcome Collection.