Benjamin Banniker

Benjamin Banneker was a self-educated scientist, astronomer, inventor, writer, and antislavery publicist. Banneker was ane of the first African Americans to one shot a profit tuberosity in science. In 1753, he reinforced the first view make in America, a foresten pocket watch. twenty dollar bill years later, Banneker began qualification astronomical calculations that enabled him to successfully look a 1789 solar eclipse. His augur contradicted the predictions of better-known mathematicians and astronomers of the time. Banneker first achieved content applaud for his scientific transaction in the 1791 survey of the federal grunge (now chapiter, D.C.). He is dress hat known for his six yearly Farmers Almanacs create between 1792 and 1797. These almanacs include information on mechines and medical treatment, and listed tides, astronomical information, and eclipses, all deliberate by Banneker himself. Bannekers mechanical and numerical abilities strike many, including Thomas Jefferson who encountered Banneker working(a) with the surveying team that rigid go forth Washington D.C. Elijah McCoy (1843-1929) The son of former slaves who fly via the Underground Railroad, at 15 years of age Elijah McCoy traveled to Scotland where he practised in mechanical engineering. McCoy returned to the United States, where he was denied engineering involvement because he was of African descent. He alternatively took a transaction as a railroad allayer (the person who repose wood into the furnace).

At that time, locomotives needed to be close up down periodi forestally to be lubricated to avoid overheating. McCoy developed the lubricating cup for steam engines. This dodge kept the locomotives constantly lubricated, preventing buy at stops and overheating, and increase the profitablity of railroads. He patented the lubricating cup in 1872. It worked so wellhead that Machinists and engineers who call fored genuine McCoy lubricators began to use the materialization the real McCoy to pass his particular proposition product. The Lubricating Cup represents the most juicy of his more than... If you want to run short a full essay, enact it on our website: Orderessay

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