4 vols. pp. xlviii, 432; xii, 478; xx, 436; xii, 503 (1). Half morocco with gilt decorated spines and marbled paper boards slightly rubbed. Signed bindings by Clyde. One or two ink notations and an inscription on half title of vol. 1. Half title missing in volume 3 also a small portion of margin not affecting text on one page. Bookplate in each volume. Slight foxing other wise very good.  Text in French.

Malebrance was a scholar of Saint Augustine then dedicated himself to Carthesian philosophy becoming an important exponent of occasionalism. Malebranche definitively brings the imaginative faculty back to the side of science and its powers to the side of rational analysis.
The work was written in 1668. Interestingly the third volume is dedicated to the mathematical sciences (arithmetic, algebra, geometry) and the fourth volume to the science of light, colour and optics.