In this way he became acquainted with Isaac Beeckman, principal of Dordrecht school.

A treatise on music theory and the aesthetics of music written for Descartes's early collaborator, Isaac Beeckman.

* Isaac Beeckman ( 1588 – 1637 ), Dutch intellectual and friend of René Decartes, has his own candle factory in Zierikzee, Netherlands, until 1616, when he returns to Middelburg to study medicine.

** Isaac Beeckman, Dutch philosopher and scientist ( d. 1637 )

* May 19 – Isaac Beeckman, Dutch scientist and philosopher ( b. 1588 )

After 1628 Gassendi travelled in Flanders and in Holland where he encountered Isaac Beeckman, with François Luillier.

Johan and his older brother, Cornelis de Witt, grew up in a privileged social environment in terms of education, his father having as good acquaintances important scholars and scientists, such as Isaac Beeckman, Jacob Cats, Gerhard Vossius and Andreas Colvius.

Isaac Beeckman ( 10 December 1588, Middelburg – 19 May 1637, Dordrecht ) was a Dutch philosopher and scientist, who, through his studies and contact with leading natural philosophers, may have " virtually given birth to modern atomism ".

* K. van Berkel, Isaac Beeckman ( 1588-1637 ) and the mechanization of the world picture.

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* Isaac Beeckman, Rudolf Snellius, Willebrord Snellius ;