A portable device used to counteract poisonous gases, being carried on a man's back. Halftone.
- Reference:
- 24075i
Licence: Public Domain Mark
Credit: A portable device used to counteract poisonous gases, being carried on a man's back. Halftone. Wellcome Collection. Source: Wellcome Collection.
![no text alternative](https://iiif.wellcomecollection.org/image/V0015690/full/800%2C/0/default.jpg)