After what has been shown in the deduction of the categories, hope fully no one will be in doubt about how to decide the question, whether these pure concepts of the understanding are of merely empirical or also of transcendental use,.e., whether, as conditions of a possible experi ence, they relate a priori solely to appearances, or whether, as conditions of the possibility of things in general, they can be extended to objects in themselves (without any restriction to our sensibility).