xvi + 507 pp. Index. Illus. 421 figures. We believe this is the rare 1st edition, no printing indication on title or copyright. "In this work the aim has been to give a detailed exposition of the various systems of telegraphy in use in America, together with a complete description of modern methods of operation...The fact that today 80 telegrams per hour are handled over a single Morse outlet where ten years ago half that number was considered good performance..." Black cloth cover with gilt spine has grease pencil "13" on spine, some light spotting on fc. Front hinge splitting. Pages are lightly toned with some storage rippling, pages 159-239 are dog-eared from storage, but all pages clean. Very hard to find.; 8vo - over 7¾" - 9¾" tall