Components of the electromechanical telegraph network. Process print.
- Reference:
- 473350i
Licence: Public Domain Mark
Credit: Components of the electromechanical telegraph network. Process print. Wellcome Collection. Source: Wellcome Collection.
![no text alternative](https://iiif.wellcomecollection.org/image/V0025510/full/800%2C/0/default.jpg)
Licence: Public Domain Mark
Credit: Components of the electromechanical telegraph network. Process print. Wellcome Collection. Source: Wellcome Collection.