. Practical physics. Fig. 268. The relay. :. r. C. Ko. (1791-1872) The inventor of the electromagnetic recording telegraph and of thedot-and-dash alphabet known by his name, was born at Charles-town, Massachusetts, graduated at Yale College in 1810, inventedthe commercial telegraph in 1832, and struggled for twelve yearsin great poverty to perfect it and secure its proper presentationto the public. The first public exhibition of the completed instru-ment was made in 1837 at New York University, signals beingsent through 1700 feet of copper wire. It was with the aid of a$30,000 grant fr
. Practical physics. Fig. 268. The relay. :. r. C. Ko. (1791-1872) The inventor of the electromagnetic recording telegraph and of thedot-and-dash alphabet known by his name, was born at Charles-town, Massachusetts, graduated at Yale College in 1810, inventedthe commercial telegraph in 1832, and struggled for twelve yearsin great poverty to perfect it and secure its proper presentationto the public. The first public exhibition of the completed instru-ment was made in 1837 at New York University, signals beingsent through 1700 feet of copper wire. It was with the aid of a$30,000 grant from Congress that the lirst commercial line wasconstructed in 18M between Washington and Baltimore 3^ bji: K^ (.O in s^s
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectphysics, bookyear1922
