Report describing the sampling of mine gases an the use of the Bureau of Mines Portable Orsat Apparatus in order to keep people safe during mine disasters.

Circular produced by the U.S. Bureau of Mines to promote safety through a series of reports on accident prevention in mines. According the the scope statement, "This first section of the revised series of circulars covers various phases of accident prevention at metal and nonmetallic mines. It presents compilations of statistical data on past accident experience, based on injuries resulting from accidents. This information shows how accident-injury records can be used in planning, executing, and measuring the effectiveness of accident-prevention programs" (p. 2).

Report including seven miners' circulars on accident prevention in metal and nonmetallic mines. The explain the cause of mine fires and methods used to prevent and control them, the occurrence of gases in mines, and the importance of standards in ventilation.