Helio throat treatment, Cresson Sanatorium, Pennsylvania: a nurse is shown watching two tuberculosis patients holding out their tongues, while sunlight is reflected into their mouths by means of small mirrors (?). Photograph, 1920/1940?.
- Date:
- [1920/1940?]
- Reference:
- 582336i
Licence: In copyright
Credit: Helio throat treatment, Cresson Sanatorium, Pennsylvania: a nurse is shown watching two tuberculosis patients holding out their tongues, while sunlight is reflected into their mouths by means of small mirrors (?). Photograph, 1920/1940?. Wellcome Collection. Source: Wellcome Collection.
