This capacity of the system for retaining dormant within it a something to be developed, by unknown causes, in time, is exemplified in the atom of virus, which, after an indefinite period, may, by mysterious agency, become a reality in the form of Hydrophobia. Well might the philosopher, when reflecting upon these incidents, exclaim, "Qui m'éclaircera de ce progrès, je le croirai d'autant d'autres miracles qu'il voudra."
Note 8, p. 86. So that the process by which an indi-
vidual, &c.] This very obscure passage seems to intimate
that, as instruction is only the development of faculties
pre-existing and in potentiality, it is not to be regarded as
an impression; for such an opinion would imply, instead
of nature's ordinary process (development), a change
from a privative state (ignorance), as well as change in
habits of thought. This cannot, however, be insisted
upon with much confidence; the French version is, "Done,
ce qui fait passer l'être qui est en puissance à la realité
parfaite, à l'entelechie, en fait d'intelligence et de pensée,
doit s'appeller, non du nom d'apprentissage, mais d'un
tout autre nom."
Note 9, p. 87. There is an analogy between, &c.] Sensation, that is, is to the body what reflection is to the mind, save that the one is produced by impression from without, and, therefore, not subject to the will, while the latter is the operation of will upon internal faculties. Thus, sensation admits a series of individual impressions which are to be analyzed and compared by the mental
