2007-01-032022-02-032007-01-032022-02-03http://hdl.handle.net/11124/66203 copies. B-134/563; Figure 9 explosives magazines. Entire excavation in rock, requiring no support, walls and back gunited. Lighting by vapor-proof lights, wiring in conduit, switches located outside.Date 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.The diagram shows the placement and dimensions of underground explosives magazines.Rights management statement available at: http://library.mines.edu/digital/rights.htmlExplosivesMiningUnderground miningStillImage