x, + 180pp., 162 b/w diagram illustrations intext. Advertisements on f.e.p.'s, section of electro-technical book advertisements at rear. Book square, illustrated cloth has a short pen scribble on rear cover, else cloth in very good condition. No dustjacket. Other than a few foxing spots to edges, finger marks on endpapers and former owner's name on fly, leaves are clean. First published September. 1912, contents include: Introduction, Main frame and apparatus room, Subscriber's switchboard arrangements, Junctions, Subscriber's apparatus, Testing arrangements, Miscellaneous circuits, Appendices X 4. A rare book on early telephone systems. Book weight approx. 330g. PLEASE NOTE: LISTED BOOKS ARE NOT STORED AT SHOP PREMISES. DIGITAL PHOTOS AVAILABLE ON REQUEST.

NOISBN, Early Telephone Construction, Telephone Schematics, Technology, Telephone Systems