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A three-page memo of May 4, 1955, from John M. Gadway, industrial hygienist at J-M's Lompoc, California, diatomaceous earth plant, to H. M. Jackson at headquarters, describing a battery-powered midget impinger (a dust sampling instrument) built at the plant. It was modeled on one the U.S. Public Health Service had used during its 1954 dust survey at Lompoc, and it did away with hand-cranking the standard instrument, so samples could be longer and taken in vehicles and hard-to-reach places. Gadway lists the parts and costs and writes that after two months' use it was "handier, easier and more rapid to employ."
- Author
- John M. Gadway
- Sent to
- H. M. Jackson
- Published by
- Johns-Manville
- Date
- May 4, 1955
- Library no.
- ACL Doc 11582 · asbestosclaims.law/library/11582
- Rights
- Republished under fair use for research and historical study.
Read or download
Read online Download the PDF Memo, May 4, 1955 · 3 pages · 121 KB
In Johns-Manville's chronology
Johns-Manville's own chronology of what the company knew describes this document as follows:
Memorandum from Gadway to Jackson, 5/4/55, re battery-operated midget impinger in use at Lompoc for dust sampling.
Cited on this site
Cite this document
“John M. Gadway to H. M. Jackson on a Battery-Operated Midget Impinger at Lompoc.” May 4, 1955. Johns-Manville. AsbestosClaims.Law Library, ACL Doc 11582. https://asbestosclaims.law/library/11582.
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