1731     &

1731       11月9日,本杰明·班纳克(Benjamin Banneker)出生于马里兰州,并长大了一个自由的黑人。 班纳克(Banneker)在巴尔的摩附近的农场里,花了很多时间研究星星。 尽管他没有接受过很多正规教育,但他还是通过借来的书自学成才,并成为著名的数学家,天文学家和发明家。 他用小刀雕刻齿轮,于1770年建造了一个木制钟表,据信这是美国第一座钟表。 班纳克(Banneker)在准确预测日食之后,于1791年开始发表科学年历。 乔治·华盛顿总统(George Washington)于1789年任命他为哥伦比亚特区委员会的委员,以帮助调查1806年去世的新首都华盛顿·班纳克(Banneker),他也与托马斯·杰斐逊(Thomas Jefferson)保持了联系,阐述了他反对奴隶制的观点。
原文:1731        Nov 9, Benjamin Banneker was born in Maryland and grew up a free black man. From his farm near Baltimore, Banneker spent much of his time studying the stars. Although he lacked much of a formal education, he taught himself with borrowed books and became a noted mathematician, astronomer and inventor. Carving its gears with a pocket knife, he built a wooden clock in 1770 that was believed to have been the first built in America. Banneker began publishing scientific almanacs in 1791 after accurately predicting a solar eclipse. President George Washington appointed him to the District of Columbia Commission in 1789 to help survey the new capital city of Washington, D.C. Banneker, who died in 1806, also corresponded with Thomas Jefferson about his views against slavery.