Petersen, Max S.2007-01-032022-02-032007-01-032022-02-03https://hdl.handle.net/11124/7191Date scanned: 2002-6-26.O-192; "Slag or spark shield" at rear of drill sharpener to prevent hot particles from hitting employees passing by. Blacksmith shop, Oliver Iron Mining Company, Ely, Minnesota (Vermilion District) - M. S. Petersen - July 1945.Held in the Russell L. and Lyn Wood Mining History Archive, Arthur Lakes Library, Colorado School of Mines.Donor: United States Bureau of Mines.The image shows two men in a blacksmith shop and illustrates a slag shield or spark shield for safety.Rights management statement available at: http://library.mines.edu/digital/rights.htmlMine safetyMinersStillImage