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 179
electric current in the Atlantic cable iscomposed of seven strands of fine copperwire twisted together, the aggregate thick-ness of which is not greater than the singlecopper wire of other submarine cables. This finecopper cord is covered carefully with gutta percha;it is then coated with tarred…
Inventions
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