Description: In Phys. 8.10 and Cael. 1.7, 3.2 Aristotle establishes theses central to his physical theory by relying on proportions he sets out in Phys. 7.5 without, though, giving any clue as to their character or even their role in the argument he develops in Phys. 7. The author seeks to determine the nature of the problematic Phys. 7.
