Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 411
y the fingers of a man two thousandmiles away, on the coast of Ireland ; and yet thisis the astounding fact. The operator in Irelandis manipulating a Magic Key, and now you arcalmost prepared to believe that it is his voice whichsounds in the darkened room, announcing the mes-sages from the other… … FIG. I. FRONT VIEW OF BOCBIN. William Thomson, of Glasgow University, and isthe most delicate apparatus of the kind ever de-vised. Because it is so sensitive as to be workedby a very feeble current of electricity,it is preferred to every other methodfor ocean telegraphy, as a current ofgreat…
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