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Triumphs and wonders of the 19th century, a volume of original, historic and descriptive writings showing the many and marvellous achievements which distinguish an hundred years of material, intellectual, social and moral progress (1901)

Boyd, James Penny, 1836-1910 · Philadelphia, A. J. Holman & co · leaf 38

An illustration from Triumphs and wonders of the 19th century, a volume of original, historic and descriptive writings showing the many and marvellous achievements which distinguish an hundred years of material, intellectual, social and moral progress, 1901, leaf 38
MAGNETIC F1KLDS OF FORCE. WONDERS OF ELECTRICITY 27 … DANIELL S CELLS. eating intelligence. In the eighteenth century, many attempts were made tocarry intelligent signals over electric wires. Some of these were quite ingen-ious, but in the end failures, because the old-fashioned frictional electricitywas the only kind then known and em-ployed. Even…

Progress · Inventions

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