<!doctype html public «-//w3c//dtd html 4.0 transitional//en»> http-equiv=content-type> Until now, the literature on Kant’s Opus Postumum has lacked a commentary on the key draft, “Transition 1–14.” The study offers a systematic interpretation with reference to Kant’s other works – especially the Critique of Pure Reason. Kant’s presentation of natural science as a true science of nature is thereby placed in the context of his transcendental philosophy.