2007-01-032022-02-032007-01-032022-02-03https://hdl.handle.net/11124/6141Date scanned: 2002-05-14.USBM #51432; Figure 22. Electric blasting, miners removing their checks from section board as they leave area.Held in the Russell L. and Lyn Wood Mining History Archive, Arthur Lakes Library, Colorado School of Mines.Donor: United States Bureau of Mines.Two miners remove their checks from a section board to show that they have left the area before blasting, underground at an unidentified mine.Rights management statement available at: http://library.mines.edu/digital/rights.htmlBlastingMine safetyMinersScenes, undergroundUnderground miningStillImage