Roentgen (unit) Roentgen (unit) The roentgen or röntgen () (symbol R) is a legacy unit of measurement for the exposure of X-rays and gamma rays. It is defined as the electric charge freed by such radiation in a specified volume of air divided by the mass of that air. In 1928 it was the first international measurement quantity for ionising radiation to be defined for radiation protection, and was an easily replicated method of measuring air ionization directly by using an ion chamber. It is named after the German physicist Wilhelm Röntgen, who discovered X-rays. Although relatively easy to measure, it had
The Amazing Dr. Clitterhouse The Amazing Dr. Clitterhouse The Amazing Dr. Clitterhouse is a 1938 American crime film starring Edward G. Robinson, Claire Trevor and Humphrey Bogart. It was directed by Anatole Litvak for Warner Bros. and written by John Wexley and John Huston, based on the first play written by short-story writer Barré Lyndon, which ran for three months on Broadway with Cedric Hardwicke after playing in London. Dr. Clitterhouse (Edward G. Robinson) is a wealthy society doctor in New York City who decides to research the medical aspects of the behavior of criminals directly by becoming one. He begins a series of