Descartes: Reflexion or deviation
Monday, October 17th, 2011
René Descartes (1596-1650), Principia Philosophia (Amsterdam: Ludovicus Elzevirius, 1650), Zentralbibliothek Zürich, Alte Drucke und Rara, FF 91, p. 285
Archive for the 'Deviation' Category
Approaching Kircher
Tuesday, August 16th, 2011
[ZB Magnet 3] Athanasius Kircher (1601-1680), Magnes sive De arte magnetica tripartium ( Köln: Iodocus Kalcoven, 1643), Zentralbibliothek Zürich, Alte Drucke und Rara, Z 113, p. 96.
Nicolaus Cabeus: Analogue to a tree a magnetic stone has small channels.
Monday, July 11th, 2011
Nicolaus Cabeus (1585-1650), Philosophia magnetica (Coloniae, 1629), Zentralbibliothek Zürich, Alte Drucke und Rara, TZ 117: 1, p. 9.
Nicolaus Cabeus (1585-1650), Philosophia magnetica (Coloniae, 1629), Zentralbibliothek Zürich, Alte Drucke und Rara, TZ 117: 1, p. 11.
These channels follow the length of the stone. Magnetic force (like water) passes through this channels.
Nicolaus Cabeus (1585-1650), Philosophia magnetica (Coloniae, 1629), Zentralbibliothek Zürich, Alte Drucke und Rara, TZ 117: 1, p. 6-7.
After a split, these channels continue to function.
Nicolaus Cabeus (1585-1650), Philosophia magnetica (Coloniae, 1629), Zentralbibliothek Zürich, Alte Drucke und Rara, TZ 117: 1, p. 110.
Does the position of the stone change the movement of the vessel in which the stone is placed?
Nicolaus Cabeus (1585-1650), Philosophia magnetica (Coloniae, 1629), Zentralbibliothek Zürich, Alte Drucke und Rara, TZ 117: 1, p. 111-112.
Cabaeus’ instruments are similar to Gilbert’s. But Cabaeus follows (in his emphasis on channels) another line of investigation. It leads him towards an understanding of magnetic forces as flux through channels.
Nicolaus Cabeus (1585-1650), Philosophia magnetica (Coloniae, 1629), Zentralbibliothek Zürich, Alte Drucke und Rara, TZ 117: 1, p. 49.
Nicolaus Cabeus (1585-1650), Philosophia magnetica (Coloniae, 1629), Zentralbibliothek Zürich, Alte Drucke und Rara, TZ 117: 1, p. 79.
