THE present volume is a continuation of a volume on preliminaries of coal mining, etc., compiled and published in the same way as the present volume, which was reviewed in these columns in June last ...

At a mine of the Sunnyhill Coal Co. near New Lexington, Ohio one day last week, amazed mine experts watched a huge (26-ton) machine in action. With surprisingly little noise, it tore into a seam, ...

This appendix presents additional details on the individual processes that are involved in extraction of coal from surface and underground mines, and the subsequent beneficiation of the coal in coal ...