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 Tesla, NikolaNikola Tesla (1856-1943) was a Serbian-American inventor who developed the radio, fluorescent lights, the Tesla coil (an air-core transformer that generates a huge voltage from high-frequency alternating current), remote control devices, and many other inventions; Tesla held 111 patents. Tesla developed and promoted the uses of alternating current (as opposed to direct current, which was promoted fiercely by Thomas Edison and General Electric). Tesla briefly worked with Thomas Edison. The unit of magnetic induction is named for Tesla; a tesla (abbreviated T) is equal to one weber per square meter. |
| Tombaugh, Clyde Clyde Tombaugh (1906-1997) was an American astronomer who discovered Pluto in 1930. He also correctly predicted (in 1950) that the surface of Mars was covered with craters. |
Truth, Sojourner Sojourner Truth (1797?-1883) was an American preacher who dedicated her life to fighting for for civil and human rights. She was born a slave in New York State, but was freed in 1827. After becoming a preacher, she campaigned for the abolition of slavery and for women's rights. During the US Civil War, she helped black Union soldiers obtain supplies and also worked as a counselor for the National Freedon Relief Association. |
Tubman, Harriet  Harriet Tubman (1820 - 1913) escaped slavery in Maryland in 1849 and traveled north. Mrs. Tubman devoted her life to fighting slavery and championing the rights of women. She then helped hundreds of other slaves flee to the north to freedom via the Underground Railroad. Mrs. Tubman helped John Brown recruit soldiers for his raid on Harpers Ferry (1859). She spied for the Union during the US Civil War (in South Carolina). After the war, she lived in Auburn, New York, and founded the Harriet Tubman Home for Aged Negroes.
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