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A four-page U.S. Bureau of Mines Information Circular of April 1949 by L. B. Berger, acting chief of its Health Branch, listing gas masks and respirators approved since Information Circular 7444 of March 1948. Under dust respirators it lists the Pulmosan S-600, approved "only for protection against the inhalation of pneumoconiosis- (silicosis- and asbestosis-) producing dusts, such as free silica and asbestos," and nuisance dusts, and the A.O. R-5000 all-dust respirator of American Optical. It ends with the names and addresses of the seven approved makers.
- Author
- L. B. Berger
- Published by
- U.S. Bureau of Mines
- Agency
- Bureau of Mines
- Date
- April 1949
- Library no.
- ACL Doc 25201 · asbestosclaims.law/library/25201
- Rights
- US government work, in the public domain.
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Read online Download the PDF Information Circular 7513, April 1949 · 152 KB
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“L. B. Berger, Supplemental List of Respiratory Protective Devices Approved by the Bureau of Mines, Information Circular 7513.” April 1949. U.S. Bureau of Mines. AsbestosClaims.Law Library, ACL Doc 25201. https://asbestosclaims.law/library/25201.
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