Roentgen (unit) this derivative quantity the roentgen equivalent physical (rep) to distinguish it from the ICR roentgen. The introduction of the roentgen measurement unit, which relied upon measuring the ionisation of air, replaced earlier less accurate practices that relied on timed exposure, film exposure, or fluorescence. This led the way to setting exposure limits,and the National Council on Radiation Protection and Measurements of the United States established the first formal dose limit in 1931 as 0.1 roentgen per day. The International X-ray and Radium Protection Committee, now known as the International Commission on Radiological Protection (ICRP) soon followed with a limit of
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