Tunneling

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. The preparation of this treatise on tunneling was undertaken as an endeavor to supply practicing engineers and contractors with such information as is needed most usually in tunnel work, and to present students with the underlying principles indispensable to the solution of the many problems met with in driving tunnels serving miscellaneous purposes. It is no small task to give, within the scope of this book, all such information as may be expected by tunnel men in general; such subjects as drilling machinery and equipment, compressor and ventilating plants, explosives and their use, etc., which alone would make a book, together with bulky descriptions bearing on the driving of individual tunnels, have necessarily been avoided or dwelt upon only briefly, and the text has been reduced to a minimum.