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Full text of "The Discovery Of The Child"

THE EXERCISES                              163

The above method of procedure reaches a pitch of exactitude
which in itself is very interesting.


To recognize the form of an object by feeling it all over, or
rather touching it with the finger-tips (as the blind do) means
something more than exercising the tactile sense.

The fact is that through touch one perceives only the super-
ficial qualities of smoothness and roughness. But, whilst the hand
(and the arm) is moving all round the object, there is added to the
tactile impression that of the movement carried out. Such an
impression is attributed to a special sense (a sixth sense) which is
called the muscular sense, and which permits many impressions to
be stored up in a * muscular memory/ or a memory of movements

It is possible for us to move without touching anything and
to be able to reproduce and remember the movement made, with
regard to its direction, the limits of extension, etc. (a pure con-
sequence of muscular sensations). But when we touch something
as we move, two sensations are mixed up together—tactile and
muscular—giving rise to that sense which the psychologists call the
" stereognostic sense ". In this case, there is acquired not only
an impression of movement accomplished, but knowledge of an
external object. This knowledge may be integrated with that
gained through vision, thus giving a more concrete exactness to
the perception of the object. This is very noticeable in little
children who seem to be possessed of greater certainty in recog-
nizing things, and above all greater facility in remembering them
when they handle them than when they only see them. This fact
is made evident by the very nature of the children in their early
years. They touch everything they see, obtaining the double image
(visual and muscular) of the innumerable different things with
which they come in contact in their environment.