Description: From Introduction: "The drilling and blasting practices described in this bulletin are chiefly those in use at the time of these visits. Information, obtained by correspondence, on recent changes at certain mines is also included. The bulletin is confined to descriptions and comparisons of drilling and blasting methods at the six open-cut mines."
Creator: Gardner, E. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department