Delaware and Hundson Company, 1922. Soft Cover. Item #46286
A short historical resume of the origin and development of railroad signaling in general and particularly on Delaware and Hudson property. 48 pages with 34 full-page photographic illustrations of various signals and equipment including Ball Pole Signal, Telegraph Block Tower, Electro-gas Semaphore, Bracket Type Signal, Tower J.X., Engine and Generator Room, Power Switchboard, Relay Rack and Terminal Board, Electric Interlocking Machine, Highway Visual Signals, and Warning Bell, Wig Wag signals, and others. Most pages printed rectos only. Bound in original string tied tan stiff paper covers with signal illustration on the front cover. The book measures 10 x 11 inches. Small chips from the cover corners. Light curl to along the spine and leading edge. A very good copy.