Discours de la methode

Descartes, René,
De l'imprimerie de Ian Maire, A Leyde, MDCXXXVII [1637]
81.  This work (also appearing in the Mathematics section as Herald 107b) was Descartes' first published treatise and discussed his ideas on the proper methods for doing science. As examples he appended separate works on optics, meteorology, and geometry. This is the book where he first stated, "je pense, donc je suis:" "I think, therefore, I am."
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81.  This work (also appearing in the Mathematics section as Herald 107b) was Descartes' first published treatise and discussed his ideas on the proper methods for doing science. As examples he appended separate works on optics, meteorology, and geometry. This is the book where he first stated, "je pense, donc je suis:" "I think, therefore, I am."

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