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 18
, 8. Glass, 12. Dry Wood, GALVANIC BATTERIES. 11 13. Dry Ice, 18. Mercury, 23. Zinc, 14. Water, 19. Lead, 24. Gold, 15. Saline Solutions, 20. Tin, 25. Copper, 16. Acids, 21. Iron, 26. Silver. 17. Charcoal or Coke, 22. Platinum, 8. ELECTRICAL TENSION.—If two or more simple bat-teries, or elements as… … electrical tension, or power of overcoming resistance, isincreased in direct proportion to the number of ele-ments. Four elements will therefore possess four timesthe tension of one element, and the current generatedby their combined action will be capable of overcomingfour times the resistance of…
Telegraph
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