His chief works are:*"Astronomical History of Observations of Heavenly Motions and Appearances" (1634)*"Ecliptica prognostica" (1634)*"An Idea of Mathematicks" (1638)*"Controversy with Longomontanus concerning the Quadrature of the Circle" (1646?
* "Astronomical History of Observations of Heavenly Motions and Appearances" (1634)* "Ecliptica prognostica" (1634)* "An Idea of Mathematicks" (1638)* "Controversy with Longomontanus concerning the Quadrature of the Circle" (1646?