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 .. . 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
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 .. . 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 currents which producedthem. This led to the discovery, be-tween 1847 and 1852, of several kinds ofelectric vibrators adapted to the produc-tion of musical sounds and their trans-mission to a distance. All this waswonderful and momentous, but a little while had still to elapse before onearose bold enough to admit the possibility of transmitting human speech byelectricity. He came in 1854, in the person of Charles Bourseul, of Paris,who, though as if writing out a fanciful dream, said, We know that soundsare produced by vibrations, and are adapted to the ear by the same vibra-tions which are reproduced by the intervening medium. But the intensitj ofthe vibrations diminishes very rapidly with th
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Keywords: ., bookcentury1800, bookdecade1890, bookidtri, booksubjectinventions
