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Scientific American

July 1, 1930

1 min read

Direct-Reading Light Intensity Meter, Fireproof Houses in France and more

By F. D. McHugh

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More by F. D. McHugh

This article was originally published with the title “Direct-Reading Light Intensity Meter, Fireproof Houses in France, and more” in Scientific American Magazine Vol. 143 No. 1 (July 1930), p. 54
doi:10.1038/scientificamerican0730-54

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