 In 1932, a well-known industrialist, Eben Byers died of radiation poisoning from the use of Radithor, a radium water guaranteed by the manufacturer to contain 2 μCi of radium.Cases sprung up of the development of carcinoma in patients who had used conventional radium therapy up to 40 years after the original treatments.Robley D. Evans made the first measurements of exhaled radon and radium excretion from a former dial painter in 1933.