The Problem of Transition in Kant’s Opus Postumum

In this paper, I try to reveal the nature of the transition problem in Kant’s Opus Postumum. Scientific developments in eighteenth century, particularly the ones in chemistry, forces philosophers to re-evaluate the role of scientific findings in the philosophical debates. In addition to these crucial developments, we observe that the a prioricity for Kant primarily depends on the physical nature of the matter which implies moving forces, but the developments in chemistry add a new dimension to the problem. Once again, Kant, after the publication of the third Critique, starts to think about the possibility of a transition from The Metaphysical Foundation of Natural Science to physics. If we succeed to construct a proper transition, we not only save the sciences from being just aggregation of the empirical data, but we may fill the gap between the knowledge about the matter and the nature as a whole.