Modern practice of the electric telegraph. A handbook for electricians and operators (1872)
Pope, Frank L. (Franklin Leonard), 1840-1895 · New York : D. Van Nostrand · leaf 22
ct with its fullforce, it is necessary to keep the clamps and connec-tions of the battery clean and bright, and free from rustor dirt. As chemical action is promoted by heat, thebattery will act more vigorously if kept in a warmplace. 19. APPLICATION OP THE DANIELL BATTERY TO MAINCIRCUITS.—This… … zinc and P the porous cell. The copper, C, is providedwith a perforated shelf, D, upon which the vitriol isplaced. Other forms have been devised which dispense en-tirely with the porous cup, the two solutions being sepa-rated by the difference in their respective specific grav-ities. Some of these…
Telegraph
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