The name is Lewis-John L., czar of the U.M.W.A., servant of the big coal interests; an example of an A. F. of L. leader.

Mode of access: Internet.

A practical treatise on coal mining.

Mode of access: Internet.

A history of the coal miners of the United States, from the development of the mines to the close of the anthracite strike of 1902,

Mode of access: Internet.

A rudimentary treatise on coal and coal-mining,

Mode of access: Internet.

Carbonisation of coal in continuous vertical retorts:

Mode of access: Internet.

Design of a coal gas induction burner for a horizontal retort setting,

Mode of access: Internet.

Cost of production. Iron, steel, coal, etc.

Carroll D. Wright, commissioner.