An X-ray valve tube designed by Sir Oliver Lodge. Inscribed "Sir O. Lodge. Patent C 685". Made by Watson's 25.8.15. Made of Amber glass.

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: An X-ray valve tube designed by Sir Oliver Lodge. Inscribed "Sir O. Lodge. Patent C 685". Made by Watson's 25.8.15. Made of Amber glass. Wellcome Collection. Source: Wellcome Collection.