Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Ultra-violet treatment apparatus, devised by N. R. Finsen. Wellcome Collection. Source: Wellcome Collection.
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Ultra-violet treatment apparatus, devised by N. R. Finsen. Wellcome Collection. Source: Wellcome Collection.