Excerpt from General Regulations for Working the Absolute Block Telegraph on Double Lines of Railway Prior to the despatch of a train from A, the Signalman there, provided he has received the Train out of section signal for the previous train and the block indicator is in its normal position, must call the attention of B, and, having obtained it, must give the proper Is line clear signal if the line be clear at B, the Signalman there must acknowledge the signal and peg the block indicator to the Line clear position. The signalman at A may then, if the line be clear, take off his signals for the train to leave A. 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.