Automobiles revolutionized dating 20th century

Although this telegraph was a technical success, it fulfilled no public need, and the market for on-board train telegraphy never took off.

There is no evidence that any commercial railway telegraph based on Granville Woods's patents was ever built. French engineer Henri Giffard successfully flew a powered navigable airship in 1852.

Garrett Morgan's cross-shaped, crank-operated semaphore was not among the first half-hundred patented traffic signals, nor was it "automatic" as is sometimes claimed, nor did it play any part in the evolution of the modern traffic light. The invention of the gas mask predates Morgan's breathing device by several decades. No product born in his laboratory was widely adopted.

For details see Inventing History: Garrett Morgan and the Traffic Signal. Early versions were constructed by the Scottish chemist John Stenhouse in 1854 and the physicist John Tyndall in the 1870s, among many other inventors prior to World War I. George Washington Carver (who began his peanut research in 1903)? Peanuts, which are native to the New World tropics, were mashed into paste by Aztecs hundreds of years ago. Kellogg, of cereal fame, secured US patent #580787 in 1897 for his "Process of Preparing Nutmeal," which produced a "pasty adhesive substance" that Kellogg called "nut-butter." George Washington Carver "Discovered" hundreds of new and important uses for the peanut? The boom years for Southern peanut production came prior to, and not as a result of, Carver's promotion of the crop.

21, 1885 issue of Scientific American as "perhaps the first ever sent to and from a moving train." Phelps remained at the forefront in developing the technology and by the end of 1887 already held 14 US patents on his system.

He joined a team led by Thomas Edison, who had been working on his "grasshopper telegraph" for trains, and together they constructed on the Lehigh Valley Railroad one of the only induction telegraph systems ever put to commercial use.

Lewis Latimer invented the carbon filament in 1881 or 1882? English chemist/physicist Joseph Swan experimented with a carbon-filament incandescent light all the way back in 1860, and by 1878 had developed a better design which he patented in Britain.

Lucius Phelps was the first inventor in the field to attract widespread notice, and the telegrams he exchanged on the New York, New Haven & Hartford railroad in January 1885 were hailed in the Feb.

Detailed evidence: The not-so-real Mc Coy Also see The Fake Mc Coy and Did Somebody Say Mc Trash? (See historical notes on plasma use.) Charles Drew was not responsible for any breakthrough scientific or medical discovery; his main career achievement lay in supervising or co-supervising major programs for the collection and shipment of blood and plasma. Banneker assisted Andrew Ellicott in the survey of the federal territory, but played no direct role in the actual planning of the city.

The story of Banneker reconstructing the city design from memory after L'Enfant ran away with the plans (with the implication that the project would have failed if not for Banneker) has been debunked by historians.

Unfortunately, some of the errors and exaggerations have acquired an illusion of credibility by repetition in mainstream outlets, especially during Black History Month (see examples for the traffic light and ironing board). The first known traffic signal appeared in London in 1868 near the Houses of Parliament.

When myths go unchallenged for too long, they begin to eclipse the truth. Although this page does not cover every dubious invention claim floating around out there, it should at least serve as a warning never to take any such claim for granted. Designed by JP Knight, it featured two semaphore arms and two gas lamps.

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