The telegraph dictionary, and seamen's signal book
Subtitle: 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: By Henry J. Rogers ...
Publisher: F. Lucas, Jr.
Published: 1845
Place of publication: Baltimore
Language: eng
Number of pages: 334
Subjects: Merchant marine; Signaling; Cipher and telegraph codes
Notes: Later published under title: Rogers and Black's American semaphoric signal book ...

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