Description of the astronomical instruments, Beijing, China
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Description of the astronomical instruments, Beijing, China. Wellcome Collection. Source: Wellcome Collection.
![no text alternative](https://iiif.wellcomecollection.org/image/L0020842/full/800%2C/0/default.jpg)
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Description of the astronomical instruments, Beijing, China. Wellcome Collection. Source: Wellcome Collection.