TABLE 26.-Men employed in bituminous-coal mines working specified number of days in 1905, 1913, 1914, 1916, 1917, 1918, and 1921, by States [From reports by operators to the U. S. Geological Survey. Because of the omission of a few mines and for other reasons, these figures of numbers employed differ slightly from those published elsewhere by the Survey. Note that classification is by mine time and that tonnage men average somewhat less and day men as a group commonly average somewhat more than the mine time] Total number Per cent of State total employed in mines working number of days specified • These figures differ very slightly from those published elsewhere by the Geological Survey. TABLE 26.-Men employed in bituminous-coal mines working specified number of days in 1905, 1913, 1914, 1916, 1917, 1918, and 1921, by States Continued Per cent of State total employed in mines working number of days specified Total number |