ossessors of this visualising faculty. The former is said to have been
able to read a column of "The Times" and repeat it _verbatim_; the latter
could deliver his lectures _verbatim_ as he had written them. Both saw
mentally the print or MS. in front of them.

Nevertheless it is a question of degree how much motor images enter into
silent thought and into the primary revival of words in different
individuals. Mach in "Analysis of Sensations" says: "It is true that in my
own case words (of which I think) reverberate loudly in my ear. Moreover, I
have no doubt that thoughts may be directly excited by the ringing of a
house-bell, by the whistle of a locomotive, etc., that small children and
even dogs understand words which they cannot repeat. Nevertheless I have
been convinced by Stricker that the ordinary and most familiar, though not
the only possible way, by which speech is comprehended is really _motor_
and that we should be badly off if we were without it. I can cite
corroborations of this view from my own experience. I frequently see
strangers who are endeavouring to follow my remarks slightly moving their
lips."

THE PRIMARY SITE OF REVIVAL OF WORDS IN SILENT THOUGHT

Since destructive lesions of the speech zone of the left hemisphere in
right-handed persons leads to inability to revive the memory pictures of
the sounds of words as heard in ordinary speech, the revival of visual
impressions as seen in printed or written characters, and of the
kinaesthetic (sense of movement) impressions concerned with the alterations
of the minute tensions of the muscle structures employed in the
articulation of words, it must be presumed that the left hemisphere in
right-handed persons is dominant in speech and silent thought; it may even
dominate the use of the left hand for many movements. But does not the
right hemisphere take a part? Yes; and I will give my reasons later for
supposing that the whole brain is in action. During the voluntary recall of
words in speech and thought by virtue of the intimate association tracts
connecting the grey matter of the whole speech zone, it is not a single
part of this zone which is in action, but the whole of it; and when we
assign to definite parts of the speech zone different functions in
connection with language, we really refer to areas in which the process is
most active or is primarily initiated, for the whole brain is in action
just as it is in the recognition of an object wh