Excerpt from 1993 Proceedings of the American Railway Engineering Association, Vol. 94 The Manual revisions to Chapter 15 involve the deletion of the entire Part 2 and combining its provisions in Part 1 and revising the affected pages of other parts. These extensive changes are not intended to affect substantively any of the specifications presently contained in Parts 1 and 2. The following narrative is included to clarify and illustrate the needed revisions. Area Committee 15, Combining Parts 1 and 2 of Chapter 15, area Manual. Revisions as approved by 1991 Letter Ballot No. 3. 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.