France (1937 SG574) 300th
Anniversary of Publication of 'Discourse de la
mèthode' wrongly scripted as 'Discourse sur la
France (1937 SG575) Corrected
Monaco (1996 SG2282) Renè
Descartes and optical diagram.
Descartes (1596-1650) was
a French philosopher, mathematician as well as a scientist. He formulated
laws for refraction and showed
accommodation was caused by changes in the shape of the lens. He also
described unconscious reflex action.
In his treatise Des passions de l'âme (1649), he noted a feigned
the eyes caused a blink. His most
famous is 'Discourse de la mèthode' which is a philosophical
the famous statement 'I think,
therefore, I am'. The book also contains many analytical geometry.