Into each of our cellars the hard coal must go and each of us must insist upon using nothing else.
I am writing by a hard coal fire in a round oak stove, and it makes a splendid heat.
But it was hard for people to be patient with the slow starting of this hard coal.
hard coal costs much more in some places than soft coal, but it burns more slowly and evenly and gives off very little smoke.
During the great coal strike in Pennsylvania in 1903, soft coal rates and hard coal rates were sadly disturbed.
Associated with these beds of hard coal are beds of black lead, or graphite, the substance used in making "lead" pencils.
For some time men had known that there was plenty of hard coal or anthracite in Pennsylvania.
I think a small lot of hard coal might always be sold here from the vessel at a profit.
Grates of cast-iron, plain or rocking, for wood and soft coal; and of water tubes, for hard coal.
And just then such a thing was an object in New York, with hard coal soaring out of reach.