Book excerpt: Excerpt from Tests of Gas Masks and Respirators for Protection From Locomotive Smoke in Railroad Tunnels With Analyses of Tunnel Atmospheres Fox, Francis, The ventilation of tunnels and buildings: Proc. Inst. Civ. Eng., vol 1898, pp. 1 - 20, discussion, pp. 21-87. Fox, Francis, The ventilation of tunnels: Eng. News, vol. 42, 1899, pp. 131-135. 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.