Chinese opium scales: the violin shaped cases are typical and the ivory beams are not uncommon;
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Chinese opium scales: the violin shaped cases are typical and the ivory beams are not uncommon;. Wellcome Collection. Source: Wellcome Collection.
![no text alternative](https://iiif.wellcomecollection.org/image/L0005100/full/800%2C/0/default.jpg)