Excerpt from Report of the Department of Mines, 1910 Dominion N o. 1 mine cubic feet of air a minute in circulation. Dominion N O. 2 mine - explosive used last

Excerpt from Monthly Statement of Coal-Mine Accidents in the United States: January to August, 1912, and Statistics for 1910 and 1911 The following Bureau of Mi

Excerpt from Twenty-Ninth Annual Coal Report of the Illinois Bureau of Labor Statistics, 1910 Percentage of mines, miners, tons, kegs of powder, 4 years Blastin

Excerpt from Mining Laws of Ohio, 1910 Where there is more than one section rela ing to the same subject matter, the additional section references have been pla