Word: thallium
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Dates: during 1950-1959
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...product of the Perkin-Elmer Corp. of Norwalk, Conn., founded in 1939 by Richard S. Perkin, a bored Wall Street man whose hobby was amateur astronomy. Teaming up with another amateur astronomer, Charles W. Elmer, he was soon turning out such optical oddities as prisms of poisonous thallium iodide (for infrared work), as well as flame photometers and infra-red spectrometers...