In 1919, the U.S. Bureau of Mines initiated the first respirator certification program in the United States.
Sources
- 100 Years of Respiratory Protection History | NPPTL | NIOSH | CDC (archive.cdc.gov)
- https://pmc.ncbi.nlm.nih.gov/articles/PMC7261008 (pmc.ncbi.nlm.nih.gov)
- https://www.osti.gov/servlets/purl/6591473 (osti.gov)
More in History
- The Cosmonaut Training Centre changed its name to Zvyozdny Gorodok (Star City) in 1968.
- The CORONA satellite made its first successful flight in August 1960.
- Senator Richard Shelby, an Alabama Republican, blocked Peter Diamond's nomination to the Federal Reserve Board of Governors even though Diamond had recently won the Nobel Prize in economics, and Diamond was never confirmed.
- One of the declassified documents outlines the chemicals and techniques necessary for developing certain types of secret writing ink and a method for opening sealed letters without detection.
- In 1909, the Nebraska Supreme Court invoked Territory of New Mexico v. Yee Shun to determine whether Japanese witness Jack Naoi could be disqualified because 'Japan is a heathen country,' according to Arif Dirlik and Malcolm Yeung in Chinese on the American Frontier.
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