Coal and the coal mines

by Homer Greene

Sump. A basin in mines entered by a slope or shaft, in which the water of the mine is collected to be pumped out.

Swamp. A depression in the seam.

Synclinal. A fold of strata in which the inclination of the sides is from the axis upward.

Tipple. In the bituminous regions, a building in which coal is dumped, screened, and loaded into boats or cars.

Trapper. See [Door boy.]

Traveling way. A passageway for men and mules in or into the mines.

Trip. The number of cars less than enough to constitute a train drawn at one time by any motive power.

Tunnel. An opening into a mine driven horizontally across the measures.

Under-clay. See [Fire clay.]