Do your electrodes last as long as they should? : now they can : Russell have the solution / Russell pH Limited.
- Russell pH Limited.
- Date:
- [1993?]
Licence: In copyright
Credit: Do your electrodes last as long as they should? : now they can : Russell have the solution / Russell pH Limited. Source: Wellcome Collection.
![no text alternative](https://iiif.wellcomecollection.org/image/b15685081_EPH_33_20_0001.jp2/full/800%2C/0/default.jpg)