Great facts : a popular history and description of the most remarkable inventions during the present century (1860)
Bakewell, Frederick C. (Frederick Collier), 1800-1869 · New York, D. Appleton and company · leaf 185
ages ; but it must be borne in mind thatno electric current is formed until a communication bemade from one pole of a voltaic battery to the other,and as such communication can only be completedthrough the insulated wire, the earth-currents cannot I THE ELECTRIC TELEGRAPH. 169 mingle, but each one… … The letters A B represent the wires making com-munications between the batteries D and E^ and thetelegraph instruments I 0 at the receiving station.The electricity from the copper end of the battery Dwould be conducted along A. through the instrumentZ, and by the wire ^to the earth-plate H. It…
Inventions
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