Excerpt from Electric Railway Journal, 1921 Type CR Frogs can be installed nearer to a point directly over the track switch point than any other frog. This increases the life of the trolley wire on the straight line approaching the frog by reducing the grind of the trolley wheel riding angularly at this point. Westinghouse Electric Manufacturing Co. East Pittsburgh, Pa. 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.