2007-01-032022-02-032007-01-032022-02-03https://hdl.handle.net/11124/6642Date scanned: 2002-06-27.Held in the Russell L. and Lyn Wood Mining History Archive, Arthur Lakes Library, Colorado School of Mines.Donor: United States Bureau of Mines.2 copies. B-134/494; Figure 5 general arrangement of device for testing safety catches - Mine B.Rights management statement available at: http://library.mines.edu/digital/rights.htmlMine safetyMiningStillImage