Sorites, what was afterwards so called, [156].
[Soul], according to Plato, [446], [449], [451], [461]; Alkmæon, [449]; Herakleitus, [449]; Diogenes of Apollonia, [449]; Anaxagoras, [449]; Empedokles, [449]; Pythagoreans, [450]; Xenokrates, criticized by Aristotle, [450]; theory of Empedokles criticized, [451]; theory of, as pervading the whole Kosmos, [451]; all the foregoing theories of, rejected by Aristotle, [452]; requisites of a good theory of, [452]; Aristotle’s point of view with regard to, [453]; the problem of, stated to cover all forms of Life, [453]; resolved by metaphysical distinction of Form and Matter, [454]-7; defined accordingly, [458]; not a separate entity in itself, [458]; not really, but only logically, separable from body, [458]; thoroughgoing implication of, with Matter, [459], [478]; is Form, Movent, and Final Cause, of the body as Matter, [460], [480]; makes with body the Living or Animated Body, [460], [480]; varieties of, in an ascending scale, [460], [481]; the lowest or Nutritive, [461]; the Sentient (also nutritive), [462]-74, see [Sentient]; higher functions of, conditioned by lower, [474]; Phantastic department of, [474]; the Noëtic or Cogitant, [478], see [Noûs], Noëtic; all varieties of, proceed from the region of Form or the Celestial Body, [480]; Noûs of the, [487]; not immortal, even the Noëtic, in the individual, [489]; is, in a certain way, all existent things, [493]; two parts of, the rational and the irrational, [521].
Sound, cause of, [467].
Species, is Second Essence, [63], [68]; one of the Predicables in Porphyry’s, not in Aristotle’s, list, [276]; logically posterior to Genus and to Differentiæ, [607].
Speech, significant by convention only, [109], [111]; Enunciative, and other modes of, [111].
Speusippus, succeeded Plato in the Academy, [7], [21]; books of, at his death, bought by Aristotle, [35]; held it impossible to define anything without knowing everything, [249]; his enumeration of Essences, [595], [629]; ascribed beauty and perfection to results, not to their originating principles, [625].
Spinoza, his definition of Substance contrasted with Aristotle’s, [93].
Spontaneity, source of irregularity in the Kosmos, [115], [205]; affects the rule of Antiphasis, [115]; objective correlate to the Problematical Proposition, [133], [205]; Generations and Constructions from, [598], [620].
Stageira, birthplace of Aristotle, [2]; destroyed by Philip, restored by Aristotle, [6].
[Stars], in their nature eternal Essences, [626]; whence the heat and light of, [644]; themselves at rest, are carried round in their circles, [644]; spherical in figure, [645], [646]; (not planets) twinkle, why, [645]; rates of motion of (planets), as determined by their position, [646]; irregular sequence of (planets), in respect of complexity of motions, [646]; partakers of life and action, [647]; why so many, in the one single First Current, [648].