186 THE DISCOVERY OF THE CHILD
To the tones are added the semi-tones, which, to prevent waste
of energy, are recognizable by the bell-stands, which are black
instead of white (recalling the keys of the pianoforte). The exer-
cise consists in placing the semi-tones in connection with the
One must not confuse the sense-education of the musical sense
in general technique, which delimits it, with musical education.
One may carry out the exercises in identifying tones without
entering at all into the field of music, just as, in another field, the
scientific, they make studies in physics, which are concerned with
the vibrations of matter including that special form which produces
The sense-exercise represents the essential base for musical
education. The child who has done such exercises is extremely
well prepared for listening to music, and therefore for making
more rapid progress.
It is not necessary' to say that, for this very reason, music
itself will continue and strengthen the sense education, just as the
study of painting will continue the study of colours, etc. The
exact base of a " classified perception " which is fixed within the
child like a foundation stone for comparison, possesses an inestim-
able initial value for continued progress.
1 It was in the course of these exercises with the bells that notice was
iafcen of the maximum number of repetitions of the same exercise in a single
round; there were counted as many as 200 repetitions by children between
six and seven years of age.