IV. -- Physics.

49. Object of Physics. -- In the wide sense in which the word is used by Aristotle, Physics embraces the study of all corporeal beings in so far as they are subject to change. After referring to the general principles bearing on corporeal being (general physics) we shall examine in detail the various classes of corporeal beings (special physics): the heavenly bodies; terrestrial bodies; and among these latter, man. Psychology is, according to Aristotle's classification, a section of physics.