Flame, electricity and the camera; man's progress from the first kindling of fire to the wireless telegraph and the photography of color (1901)
Iles, George, 1852-1942 · New York, Doubleday & McClure co. · leaf 215
trike a bell suitably adjusted (Fig. 54). In 1833 Professor Weber built a Hne of telegraph which,instead of being confined within the walls of a room, wentforth into the open. It connected the Observatory of Got-tingen with the Cabinet of Physics, and was about six thou-sand feet in length. The use… … i82 TELEGRAPHY—LAND LINES so long a conductor. In 1837 Steinhell built a line fromthe Royal Academy, Munich, to the Observatory, Bogen-hausen, a distance of three miles. Felt was used as theinsulator, and proved very defective. The first lineconstructed in England, two years later, was a…
Fire · Electricity · Color photography
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