The telegraph dictionary, and seamen's signal book, adapted to signals by flags or other semaphores; and arranged for secret correspondence, through Morse's electro-magnetic telegraph: for the use of commanders of vessels, merchants, &c. By Henry J. Rogers ...
|Main Author:||Rogers, Henry J., 1811-1879.|
Baltimore, F. Lucas, Jr. [c1845]
Cipher and telegraph codes
> Merchant marine.
Merchant marine > Signaling.
Later published under title: Rogers and Black's American semaphoric signal book ...
x p., 1 ℓ., xi-xii, , 11-334 p., 1 ℓ.
col. front., 4 pl. (3 col.)
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