Word: metallographs
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...metallograph, an instrument which scientists use to pry into the minute details of metal structure, is the most powerful microscope ever made. Mr. Lucas himself drew up the designs, took his specifications to the scientists of the famed German optical company, Carl Zeiss Works of Jena. The completed instrument will be set up in the Bell Telephone Laboratories, Manhattan. Like doctors and bacteriologists who study diseased tissue, metallurgists will be able to determine exactly what happens internally when a metal gives way under strain...
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