Ring-shaped anode, first special type of tube for x-rays.
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Ring-shaped anode, first special type of tube for x-rays. Wellcome Collection. Source: Wellcome Collection.
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Ring-shaped anode, first special type of tube for x-rays. Wellcome Collection. Source: Wellcome Collection.