Book/Printed Material American telegraph system, semaphoric as well as magnetic. American semaphore or marine signals, connected with the electro-magnetic telegraph. Rogers & Black, patentees of the semaphore-Henry O'Rielly, Agent for the U. S. [n. p. n. d.].
-
Image 1 of American telegraph system, semaphoric as well as magnetic. American semaphore or marine signals, ... AMERICAN TELEGRAPH SYSTEM, SEMAPHORIC AS WELL AS MAGNETIC. American Semaphore or Marine Signals, connected with the Electro-Magnetic Telegraph. Rogers & Black, Patentees of the Semaphore—Henry O'Rielly, Agent for the U.S. The extension... -
Image 2 of American telegraph system, semaphoric as well as magnetic. American semaphore or marine signals, ... 2 testimonial of Professor Morse may be selected from among many other evidences—(and evidences enough may be found in the accompanying expressions from New York, Philadelphia, Baltimore, and Washington newspapers—from Chambers of... -
Image 3 of American telegraph system, semaphoric as well as magnetic. American semaphore or marine signals, ... 3 Opinion of Baltimore Insurance Companies on the American Semaphore System. Baltimore, 27th February, 1846. Having examined Rogers & Black's Telegraph Dictionary and Seaman's Signal Book, we are of opinion that, when... -
Image 4 of American telegraph system, semaphoric as well as magnetic. American semaphore or marine signals, ... 4 OPINIONS OF THE PRESS. [ From the New York Express. ] Improvement in the Telegraph System. —We had supposed, from what we had seen of the different systems of Telegraphs in...