"vowels and consonants, which constitute speech, to the larynx, tongue and lips," seems, by this variety of sounds, to consider voice as a kind of harmony; and Cuvier says, that all the modifications of sound which are expressible by the letters of the alphabet, "take place in the mouth, and depend on the relative mobility of the tongue, and still more the lips, whence the perfection of man's speech is derived."
Note 5, p. 138. But since we judge of white, sweet,
and each other, &c.] The only answer to this, as it was
to a former inquiry, is, that the brain is that general-
ising faculty, and that it fulfils all the conditions, however
enigmatically described, which are required in the text.
It is impossible to refuse to the brain the property of
receiving and comparing contrary impressions, simultane-
ously, and receiving them, therefore, in the words of the
text, as an indivisible principle, just as the mind can
compare opposite ideas; and all the speculations upon
impulses and the divisibility and indivisibility of that
which is to perceive and judge only shew the want of a
central organ for the reception and comparison of indi-
vidual sensations. And many of these passages are
necessarily obscure, owing to their partaking of the
character of inquiry or suggestion, rather than didactic
statement; but their obscurity may be, in part, seen
through by the introduction of that source of sensibility,
which is said, in the closing paragraph, to constitute
animal in contradistinction to mere vegetive life.
