[C] Logical intension and extension.
[D] In this section the soul-powers are at first separated into Three
Chief Classes; afterwards, in the following sections, each one of these
is again sub-divided into several parts.
[E] Doctor S. Landauer, in the Notes to his German Translation, quotes
fully from the Greek text of Aristotle’s «De Anima,» and comes to the
conclusion that Ibn Sînâ has, in the first sub-section, given the
contents of de anima II, chap. 3, but has changed the order of the
ideas; and to the further conclusion that the second sub-section,
dealing with the definition of the soul, is nothing more than an
extract from de anima II, chap. 1.
[9] «differs, not through its matter, but through its form»: this
resolves matter back to One Element; but he has already named Four,
viz. Earth, Air, Fire, and Water; or rather he has declared the
elements to be Four.