Abstract

The construction of geometrical concepts is familiar to readers of Kant’s _Critique of Pure Reason_ and _Prolegomena_ as the “shining example” [_glänzendes Beispiel_] of a priori cognition. So when Kant begins to offer constructions of concepts in physics in the _Metaphysical Foundations of Natural Science_, it seems unproblematic that mathematics is being applied to matter in motion. Much of Kant’s rhetoric suggests that nothing extraordinary is going on. And yet, constructions in Kant’s philosophy of physics display such peculiarities in comparison to mathematical ones that they begin to seem like unfamiliar operations, distinct from constructions in pure mathematics.