NOTED INVENTIONS | AdventAI

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NOTED INVENTIONS.

Quadruplex telegraphy, invented by Thomas A. Edison, in 1874.

The dynamo was constructed by Siemens & Halske, of Berlin, in 1874.

The "Ordinary" bicycle was invented in 1874. The roller process in milling was introduced in 1876. The Bell telephone was invented in 1876, and Edison's carbon transmitter was introduced in 1878. In 1893 there were more than 600,000 telephones in use in the United States.

The cantilever principle in bridge building was first employed in 1876. The phonograph was invented by Edison in 1877. In 1879 the first electric railway was operated in Berlin by Siemens. In 1879 Edison produced the incandescent electric light.

Electric Light.

In the decade from 1886 to 1896 we have the graphophone; Pull-man and Wagner cars, and vestibuled trains; Harveyized armor-plates; artificial silk from pyroxylin; horseless carriages; the Zalinski dynamite gun; the Mergenthaler linotype machine; the Welsbach gas burner; the Krag-Jorgensen rifle; Langley's aerodrome (a steam flying-machine); acetylene gas from calcium

carbide; discovery of argon (a hitherto unknown element in the atmosphere); the Roentgen rays, or "X" rays; Edison's fluoroscope for seeing with the cathode ray; Tesla's discoveries in electricity; liquid air produced in commercial quantities; the

kinetoscope; the web perfecting press; the modern bicycle; transmission of pictures by telegraph; the cash register; a fluorescent light bulb, produced by both Edison and Tesla, giving light without heat; welding of metals by electricity; development and improvement in typewriters; artificial diamonds produced from pure carbon compressed by the shrinking of heated metal; and the eophone, for detecting the direction of sounds during a fog or storm.

In 1898 Prof. Henry A. Rowland, of Johns Hopkins University, invented a device for sending eight messages over the same telegraph wire at the same time, four in each direction. In the same year Prof. S. W. Burnham, the astronomer, invented a calculating machine, by which multiplication and division and the extraction of square roots and roots up to the ninth power are accomplished by the mere movement of a hand upon a disk.