Introductory course of natural philosophy for the use of schools and academies. Ed. from Ganot's popular physics. By William G. Peck (1869)
Ganot, Adolphe, 1804-1887, Peck, William Guy, 1820-1892 · New York A.S. Barnes · leaf 465
is the signal telegraph. How many kind* are in common use ? Explain their general principle. Whatis the dial telegraph ? The signal telegraph ? 462 POPULAR PHYSICS. The dial telegraph is used in France on the lines of rail-ways. The signal telegraph was used in France for ordinary-purposes until it… … Fig. 301. Fig. 301 represents the method of dispatching a telegram,and Fig. 302 represents the method of receiving it. At Where were these used? (436.) Describe Morses registering telegraph. ELECTRO-MAGNETIC TELEGRAPH. 463 each station the apparatus is identical, but it is double ; thatis, composed…
Physics
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