Samuel Barbour, (1860 – 3 June 1938), was an Australian chemist, photographer and X-ray pioneer, in the colony of South Australia.
Frederick Woodward Branson, FIC, FCS, (6 March 1851 – 30 November 1933), was a British chemist, glassblower, instrument maker, and X-ray pioneer.
Friedrich Hecht, (3 August 1903, Vienna – 8 March 1980, Vienna), was an Austrian chemist and writer. As a writer of science fiction, he went by the pseudonym ”Manfred Langrenus”.
Richard Reynolds, FCS, (12 May 1829 – 5 April 1900), was an English pharmaceutical chemist, optician, instrument maker, and X-ray pioneer.
Health Physics, Science Stamps, & Musings 