Estimation of Injurious Dust in Mine Air by the Kotze Konimeter

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This article was originally published with the title “Estimation of Injurious Dust in Mine Air by the Kotze Konimeter” in SA Supplements Vol. 87 No. 2244supp (January 1919), p. 6
doi:10.1038/scientificamerican01041919-6bsupp

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