History, theory, and practice of the electric telegraph (1866)
Prescott, George B.(George Bartlett),1830-1894 · Boston, Ticknor and Fields · leaf 110
er development of this faculty.We have in our recollection now, one who, after many monthsapplication, was obliged to translate his despatch into the arbi-trary characters of the telegraphic alphabet, upon a slate or apiece of paper, and then count for the dashes and dots as he THE MORSE SYSTEM. 91… … many years ; but since the adoption of the method of reading bysound, another apparatus has taken the place of the register, orrecording apparatus, called the sounder (Fig. 42). 92 ELECTRIC TELEGRAPH APPARATUS. This is simply an electro-magnet attached to a rosewood ormahogany base, with an…
Telegraph
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