October 9th, 2011
Descartes: A celestial body, defg is a spot covering this body
October 9th, 2011
René Descartes ( 1596-1650), Principia Philosophia ( Amsterdam: Ludovicus Elzevirius, 1650), Zentralbibliothek Zürich, Alte Drucke und Rara, FF 91, p. 137
Descartes: Like balls in a slingshot particles are spread out from the sun
October 7th, 2011
René Descartes (1596-1650), Principia Philosophia ( Amsterdam: Ludovicus Elzevirius, 1650), Zentralbibliothek Zürich, Alte Drucke und Rara, FF 91, p. 93
A vortex (AYBM) with the sun (S) in the center. Materia in different forms tends to move away from the centre. One form of materia is spherical.
October 5th, 2011
René Descartes ( 1596-1650), Principia Philosophia ( Amsterdam: Ludovicus Elzevirius, 1650), Zentralbibliothek Zürich, Alte Drucke und Rara, FF 91, p. 129
