The areas of research represented here cover a wide spectrum of sciences, from mathematics and physics to the life sciences, as well as linguistics and economics. This selection is a showcase of French philosophy of science, illustrating the different methods employed: logico-linguistic analysis, rational reconstruction and historical inquiry. These participants have the ability to relate their research both to the French tradition and current discussions on the international scene. Also included is a substantial historical introduction, explaining the development of philosophy of science in France, the various schools of thought and methods as well as the major concepts and their significance.