  The synthesis of apprehension is somewhat more shadowy than the other two. In the second edition, the idea does not even appear until §26, i.e., late in TD. At A120, Kant tells us that apprehending impressions is taking them up into the activity of imagination, i.e., into the faculty of the mind that becomes conscious of images. He tells us that we can achieve the kind of differentiation we need to take them up only “in so far as the mind distinguishes the time in the sequence of one impression upon another” (A99). Kant uses the term ‘impression’ (Eindrucke) rarely; it seems to be in the same camp as ‘appearance’ (Erscheinung) and ‘intuition’ (Anschauung).