History, theory, and practice of the electric telegraph (1866)
Prescott, George B.(George Bartlett),1830-1894 · Boston, Ticknor and Fields · leaf 45
ll lines in this country, as weshall see further on. Daniell gave the cylindrical form to thepairs of his battery, on account of the greater facility of pro-curing diaphragms of this form. In his battery (Fig. 4) a hol-low copper cylinder is plunged into a glass vessel filled with asolution of… … used at present), which is filled with either acidulated or salinewater; finally, in this water is plunged a zinc cylinder, which is in metallic coin-muni cationwith the cop-per of the suc-ceeding pairsby means of awire attachedto a screw-cupupon the cop-per cylinder.The zinc cyl-inder may be solid…
Telegraph
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