, a geometrician of the seventeenth century, was born at Lyons in
, a geometrician of the seventeenth century, was born at Lyons in 1597, and died there
in 1661. He was the friend of Descartes; this friendship
was of service to them both Descartes instructed hisfriend, and Des Argues defended his master against
Fermat and Bourdin. He wrote, 1. “Un Traite de Perspective,
” fol. 2. “Traite des Sections Coniques, 8vo. 3.
” La
Pratique du Trait,“8vo. 4.
” Traite de la coupe des
Pierres,“8vo, an excellent work on stone-cutting. 5.
” Maniere de poser l'essieu aux cadrans solaires.“6.
” Maniere
de graver en taille douce, et a l'eau forte." All these
treatises are said to be written with precision, and in a
better style than might have been expected from his
time.