Petersen, Max S.2007-01-032022-02-032007-01-032022-02-03https://hdl.handle.net/11124/6019Date scanned: 2002-6-18.USBM #63793; Chemox breathing apparatus being demonstrated to John Moha of Montreal Mining Company by George Knoll of M. S. A. at the Lake Superior Safety Conference, Hotel Duluth, Duluth, Minnesota, June 20-21, 1946. - M. S. Petersen - June 1946.Held in the Russell L. and Lyn Wood Mining History Archive, Arthur Lakes Library, Colorado School of Mines.Donor: United States Bureau of Mines.Seven men examine a Chemox breathing apparatus. This is a self-contained breathing escape apparatus that uses chemicals to generate oxygen.Rights management statement available at: http://library.mines.edu/digital/rights.htmlMine safetyPeopleStillImage