New York: McGraw-Hill Book Co., Inc., 1920. Second edition, revised and enlarged, third impression. Cloth over Boards. Octavo, pp xii, 433, indexed, illustrated with b/w drawings. Very good. Item #19576
A knowledge of the properties and behavior of the gases found or generated in the mine, and the means for effecting their safe removal or rending them harmless, are of chief importance, requiring careful study combined with practical experience in the operation of coal mines. No effort has been spared to make this volume a standard of ventilating practice.