American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 381
ROBERTSON RECEIVER. ROBERTSON TRANSMITTER. simply reproduce in fac-simile the writings or sketches which have been previously pre-})ared on a conducting surface; as in the case of the Denison fac-simile telegraph, hereindescribed. The first to invent a telegraph system which would reproduce…
Telegraph
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
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