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Scientific American

February 1, 1941

1 min read

Photometer, March of Technology

Eliminates Human Element In Spectrographs Analysis; Research Necessary to Plan For More Stable Economy

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This article was originally published with the title “Photometer, March of Technology” in Scientific American Magazine Vol. 164 No. 2 (February 1941), p. 81
doi:10.1038/scientificamerican0241-81

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