Mathematical Treasure: Francisco Villela Barbosa's Breve Tratado de Geometria Spherica

Francisco Villela Barbosa (1769–1846) was a Portuguese mathematician. He graduated from the University of Coimbra in 1796, earning a degree in mathematics. His early career was spent as a professor of geometry at the Royal Navy Academy in Lisbon. Barbosa later became a noted poet and Brazilian civil servant. Author of several geometry texts, he intended his 1817 Breve Tratado de Geometria Spherica as a supplement to one of those books.

Some sample pages:

These images are presented courtesy of the John Carter Brown Library, Brown University. The full volume may be read here.

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