Benjamin Banniker

Benjamin Banneker was a self-educated scientist, astronomer, inventor, writer, and antislavery publicist. Banneker was one of the first African Americans to turn a profit distinction in science. In 1753, he built the first view made in America, a wooden pocket watch. twenty dollar billhook years later, Banneker began making galactic calculations that enabled him to successfully forecast a 1789 solar eclipse. His estimate contradicted the predictions of better-known mathematicians and astronomers of the time. Banneker first achieved national acclaim for his scientific work in the 1791 survey of the Federal crud (now Washington, D.C.). He is best known for his six annual Farmers Almanacs piss between 1792 and 1797. These almanacs included information on mechines and medical treatment, and listed tides, astronomical information, and eclipses, all calculated by Banneker himself. Bannekers mechanical and mathematical abilities let on many, including Thomas Jefferson who enc ountered Banneker working with the surveying team that laid go forth Washington D.C. Elijah McCoy (1843-1929) The son of former slaves who escaped via the impedance Railroad, at 15 years of age Elijah McCoy traveled to Scotland where he practised in mechanical design. McCoy returned to the United States, where he was denied engineering involvement because he was of African descent. He instead took a transaction as a railroad fireman (the someone who repose wood into the furnace). At that time, locomotives needed to be bar down periodically to be lubricated to avoid overheating. McCoy substantial the lubricating cup for steam engines. This invention kept the locomotives constantly lubricated, preventing usual 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 cheek the real McCoy to pass his specific p roduct. The Lubricating Cup represents the ! most juicy of his more than... If you want to get a full essay, ordinance it on our website: BestEssayCheap.com

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