What are you figuring now? / Ferris, Jeri

A biography of the Afro- American farmer and selftaught mathematician, astronomer, and surveyor for the new capital city of the United States in 1791, who also calculated a successful almanac notable for its preciseness.

A biography of the African-American farmer and self-taught mathematician, astronomer, and surveyor for the new capital city of the United States in 1791, who also calculated a successful almanac notable for its preciseness.

A biography of the African-American farmer and self-taught mathematician, astronomer, and surveyor for the new capital city of the United States in 1791, who also calculated a successful almanac notable for its preciseness.

A biography of the African-American farmer and self-taught mathematician, astronomer, and surveyor for the new capital city of the United States in 1791, who also calculated a successful almanac notable for its preciseness.