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Updated: June 20, 2025
By the end of his second year he had had his finger in many pies and had worked on about every sort of electrical contrivance then known: call bells, annunciators, galvanometers; telegraph keys, sounders, relays, registers, and printing telegraph instruments. Think what a rich experience his two years of apprenticeship had given him!" "You bet!" ejaculated Ted appreciatively.
Accordingly, the forger was put to Death; the utterer of a bad note was put to Death; the unlawful opener of a letter was put to Death; the purloiner of forty shillings and sixpence was put to Death; the holder of a horse at Tellson's door, who made off with it, was put to Death; the coiner of a bad shilling was put to Death; the sounders of three-fourths of the notes in the whole gamut of Crime, were put to Death.
He found M'Tosh sitting at Donohue's elbow, and the sounders on the glass-topped table were crackling like overladen wires in an electric storm. "Strike talk," said the train-master. "Every man on both divisions wants to know what's doing. Got your newspaper string tied up all right?" Kent made a sign of assent. "We are waiting for Mr. Patrick Callahan. Any news from him?" "Plenty of it.
The Hughes, or the Stock Exchange instruments, for instance, print the message in Roman characters; the sounders strike it out on stops or bells of different tone; the needle instruments indicate it by oscillations of their needles; the Morse daubs it in ink on paper, or embosses it by a hard style; while Bain's electro-chemical receiver stains it on chemically prepared paper.
[Footnote 71: Plutarch seems to mean something like drums furnished with bells or rattles; but his description is not very clear, and the passage may be rendered somewhat differently from what I have rendered it: "but they have instruments to beat upon ([Greek: rhoptra] ῥόπτρα), made of skin, and hollow, which they stretch round brass sounders" ([Greek: êcheiois]
He put into his cabinet each time certain sounders, markers, and lamps, which could be moved, ticked, or lighted only by hands in the cabinet, and he kept the same rigid control of his medium outside the cabinet. For the most part she was in the light.
As a matter of fact, the code is used in both ways, according to the nature of the line and receiving instrument. On submarine cables and with needle and "mirror" instruments, the signals are made by reversing currents of equal duration, but on land lines worked by "Morse" instruments and "sounders," they are produced by short and long currents.
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