Excerpt from Compressed Air Magazine, Vol. 13: January to December, 1908 The work of excavating for the New York terminal of the Pennsylvania Railroad is not at all tunnel work, but_ it is at the 'point where four of the tunnels are to meet. This work was, to think of, a Simple affair. It was only to dig a hole in the ground; but it was a hole measuring roughly, in the main portion of it. 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.