Lightning flashes and electric dashes, a volume of choice telegraphic literature, humor, fun, wit & wisdom (1877)
Johnston, W. J. (William John) · New York : W. J. Johnston · leaf 162
PrnPHlLA2.-w-. ta^ … The Quadruplex! Explanation : A, The armature lever, which the Operator grasps firmly.C, The Condenser.O, The Operator. R, R, Receivers, constructed of wicker-work, on either side of the instrument, and Intowhich messages are put, to be forwarded.X, X, An extra local, for emergencies. Directions.…
Telegraph
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