Practical Tunnelling: Explaining in Detail the Setting Out of the Works; Shaft Sinking and Heading Driving; Ranging the Lines and Levelling Under Ground; Sub-Excavating Timbering and the Construction of the Brickwork of Tunnels; With the Amount of

Excerpt from Practical Tunnelling: Explaining in Detail the Setting Out of the Works; Shaft Sinking and Heading Driving; Ranging the Lines and Levelling Under Ground; Sub-Excavating Timbering and the Construction of the Brickwork of Tunnels; With the Amount of Labour Required for and The<br><br>I had the pleasure of assisting him; and is represented in the following section.<br><br>London Clay Yellow clay thickness not determined. Blue or slate-coloured clay thickness 10 to 15 feet.<br><br>About the Publisher<br><br>Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com<br><br>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.