Pascal's scientific work encompasses a vast range of issues from projective geometry (Essay pour les Coniques, 1640), to mechanical computation (Lettre dédicatoire […] sur le sujet de la machine […] pour faire toutes sortes d 'opérations d'arithmétique, 1645), from fluid statics and the problem of the vacuum (Expériences nouvelles touchant le vide, 1647; Récit de la grande expérience de l'équilibre des liqueurs, 1648) to the problems of stakes, calculus of probabilities and combinatory analysis (Correspondence with Fermat, 1654), to the calculus of indivisibles and the study of infinitesimal problems (Lettres de A. Dettonville, 1659). Despite several of his texts were left unfinished (Generatio conisectionum; De l'esprit géométrique; Introduction à la géométrie), had circulated in very limited editions (Traité du triangle arithmétique, printed in 1654 but not distributed, 1st. ed. 1665; items pertaining to the cycloid competition (1658-1659)), or were printed only posthumously (Traités de l'équilibre des liqueurs et de la pesanteur de la masse de l'air, 1654, 1st ed. 1663) Pascal was a leading figure of the early-modern scientific debate. More importantly, besides his outstanding contributions to different scientific fields, Pascal provided a lucid and cutting edge analysis of the aims and methods of modern science, explored the possibilities of new scientific practices, and proposed a theoretical reappraisal of the limits of scientific enterprises.