Licence: Public Domain Mark
Credit: Mathematics: a graph-plotting machine. Engraving by Benard. Wellcome Collection. Source: Wellcome Collection.
![no text alternative](https://iiif.wellcomecollection.org/image/V0025488/full/800%2C/0/default.jpg)
Licence: Public Domain Mark
Credit: Mathematics: a graph-plotting machine. Engraving by Benard. Wellcome Collection. Source: Wellcome Collection.