Keywords: ncgs usgs cyanide montgomery nc monochrome photo border text outdoor North Carolina Geological Survey, "Economic Papers, No. 14, The Mining Industry in North Carolina in 1906," 1907, by Joseph Hyde Pratt, Plate VII, facing p. 32. digital.ncdcr.gov/cdm/compoundobject/collection/p16062col... economicpapers1215unse_0193_b North Carolina Geological Survey, "Economic Papers, No. 14, The Mining Industry in North Carolina in 1906," 1907, by Joseph Hyde Pratt, Plate VII, facing p. 32. digital.ncdcr.gov/cdm/compoundobject/collection/p16062col... economicpapers1215unse_0193_b |