Government Technical Reports
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On Global Resources
Fall 2010 | Volume 30, Number 1 | Download PDF
Government Technical Reports

"Equipment for testing safety devices of electric miner’s lamp in explosive mixture of gas and air." From U.S. Department of
Commerce Bureau of Mines Bulletin 131: Approved Electrical Lamps for Miners by H. H. Clark and L. C. Isley (Washington, D.C.:
U.S. Government Printing Office, 1917). From TRAIL collections.