Excerpt from An Investigation of the Coals of Canada, With Reference to Their Economic Qualities, Vol. 1 of 6: As Conducted at McGill University, Montreal, Under the Authority of the Dominion Government Continuous ascending current washers or classifiers Intermittent current ascending wa'shers or jigs. Bumping tables Washing plants in general.. Description of washing, r plants. Discussion of the plants above descrilx'd. Preparation of anthracite coal. Special features of anthracite preparation Description of the anthracite breaker at Bankhead \lta. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.