Carl F. W. Ludwig's kymograph
Licence: In copyright
Credit: Carl F. W. Ludwig's kymograph. Wellcome Collection. Source: Wellcome Collection.
![no text alternative](https://iiif.wellcomecollection.org/image/L0012233/full/800%2C/0/default.jpg)
Licence: In copyright
Credit: Carl F. W. Ludwig's kymograph. Wellcome Collection. Source: Wellcome Collection.