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- COPY MANUFACTURE OF RADIUM CLASSED AS DANGEROUS The Academy of Medicine, upon the advice of Professor Regaud, recently requested that the manufacture of radium be classed as a dangerous and unhealthy industry and that it be subjected to the same control as other notoriously toxic industries, such as those making mercurials, lead, and arsenic. This decision was provoked by recent deaths, particularly that of the chemical engineer, M. Demenitroux, who formerly collaborated with Curie and recently directed a factory for the manufacture of radioactive products, notably those of mesothorium. His death was due to an anemia resulting from contact with radium products. Apr. 10, 1925 Ind. & Eng. Chem. News Edition.