[Skip to Content]
[Skip to Content Landing]
June 21, 1941

List of Respiratory Protective Devices Approved by the Bureau of Mines

JAMA. 1941;116(25):2824. doi:10.1001/jama.1941.02820250090034

This article is only available in the PDF format. Download the PDF to view the article, as well as its associated figures and tables.


This is the most recent revision of the list of approved respiratory protective apparatus issued by the Health and Safety Branch of the Bureau of Mines. Certificates of approval are issued only if the devices fulfil established requirements. These are discussed briefly in the circular.

First Page Preview View Large
First page PDF preview
First page PDF preview