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Triumphs and wonders of the 19th century, the true mirror of a phenomenal era, a volume of original, entertaining and instructive historic and descriptive writings, showing the many and marvellous achievements which distinguish an hundred years of material, intellectual, social and moral progress .. (1899)

Boyd, James Penny, 1836-1910 · Philadelphia, Pa., A. J. Holman & Co · leaf 41

An illustration from Triumphs and wonders of the 19th century, the true mirror of a phenomenal era, a volume of original, entertaining and instructive historic and descriptive writings, showing the many and marvellous achievements which distinguish an hundred years of material, intellectual, social and moral progress .., 1899, leaf 41
A STRING TELEPHONE. quently. One of the earliest steps to-ward the evolution of the electric tele-phone was taken by Mr. Page, of Salem,Mass., in 1837, who discovered that amagnetic bar could emit sounds whenrapidly magnetized and demagnetized;and that those sounds corresponded withthe number of…

Progress · Inventions

Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.

More pictures from Triumphs and wonders of the 19th century, the true mirror of a phenomenal era, a volume of original, entertaining and instructive historic and descriptive writings, showing the many and marvellous achievements which distinguish an hundred years of material, intellectual, social and moral progress ..

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