217-248) included in the collection of scientific tracts published by Mersenne under the title Cogitata physico-mathematica in 1644, and a highly compressed statement of his psychological application of the doctrine of motion (L.W.
Among his other works are: Euclidis elementorum libri, &c. (Paris, 1626); Universae geometriae synopsis (1644); Les Mechaniques de Galilee (Paris, 1634); Questions inouies ou recreations des savants (1634); Questions theologiques, physiques, &c. (1634); Nouvelles decouvertes de Galilee (1639); Cogitata physico-mathematica (1644).
Towards the close of 1607 he sent to his friends a small tract, entitled Cogitata et Visa, probably the first draft of what we have under that title.
(5) Cogitata et Visa, perhaps the most important of the minor philosophical writings, dating from 1607 (though possibly the tract in its present form may have been to some extent altered), and containing in weighty and sonorous Latin the substance of the first book of the Organum.
At the request of his friends he devoted a fortnight to applying the same method to the first or metaphysical part of Descartes's philosophy, and the sketch was published in 1663, with an appendix entitled Cogitata metaphysica, still written from a Cartesian standpoint (defending, for example, the freedom of the will), but containing hints of his own doctrine.
Accesserunt ejusdem cogitata metaphysica.