Author Archive

Descartes: Striated particles (particulae striatae) pass veins inside the earth in two senses.

Tuesday, October 11th, 2011

René Descartes  (1596-1650), Principia Philosophia (Amsterdam: Ludovicus Elzevirius, 1650), Zentralbibliothek Zürich, Alte Drucke und Rara, FF 91, p. 266

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Monday, October 10th, 2011

Descartes: Several vortices (vortex C in the centre)

Monday, October 10th, 2011

René Descartes  (1596-1650), Principia Philosophia (Amsterdam: Ludovicus Elzevirius, 1650), Zentralbibliothek Zürich, Alte Drucke und Rara, FF 91, p. 148

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Descartes: A celestial body, defg is a spot covering this body

Sunday, October 9th, 2011

René Descartes  ( 1596-1650), Principia Philosophia ( Amsterdam: Ludovicus Elzevirius, 1650), Zentralbibliothek Zürich, Alte Drucke und Rara, FF 91, p. 137

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Saturday, October 8th, 2011

Judith Albert

Descartes: Like balls in a slingshot particles are spread out from the sun

Friday, October 7th, 2011

René Descartes  (1596-1650), Principia Philosophia ( Amsterdam: Ludovicus Elzevirius, 1650), Zentralbibliothek Zürich, Alte Drucke und Rara, FF 91, p. 93

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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.

Wednesday, October 5th, 2011

René Descartes  ( 1596-1650), Principia Philosophia ( Amsterdam: Ludovicus Elzevirius, 1650), Zentralbibliothek Zürich, Alte Drucke und Rara, FF 91, p. 129

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Wednesday, October 5th, 2011

Wednesday, October 5th, 2011

Judith Albert

There is no empty space in the universe. Between four spherical bodies small particles are situated and shaped. They are principal for understanding magnetism

Tuesday, October 4th, 2011

René Descartes  ( 1596-1650), Principia Philosophia ( Amsterdam: Ludovicus Elzevirius, 1650), Zentralbibliothek Zürich, Alte Drucke und Rara, FF 91, p. 129

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