210 THE DISCOVERY OF THE CHILD given by the teacher and the musical performances a long patient course of the exercises which serve to give flexibility to the finger- joints and to the tendons, to render automatic the co-ordination of special muscular movements, and to strengthen by repeated use of the organ the muscles of the hand. The pianist will therefore have to make himself by his own efforts, and will have succeeded in doing so in the pro- portion in which his natural genius would induce him to persist in his exercises. Nevertheless the pianist would never have created himself by practice alone, without the guidance of the master. One might say that the same thing happens in every branch of education; a man's value depends not on what masters he has had, but on what he has done. One of the difficulties met with in teaching our method to mistresses of the old style is that of hindering them from interfering when the child is worried for a long time about some mistake and is making repeated attempts to put it right. Then the old-time mistresses are seized with pity, and nothing can prevent them from coming to the child's assistance. When one prevents this inter- ference, they speak pityingly of the small pupil; but very soon the latter shows in his smiling countenance the joy of having overcome an obstacle. Normal children repeat these exercises many times more or less, according to the individual; some are tired of them after five Ľor six times, but others go on for more than twenty times displacing and rearranging the pieces without ever losing their keen expression of interest, On one occasion, after I had counted sixteen exercises done by a. little girl of four, I had a hymn sung to her in order to distract her attention; but she continued, unperturbed, to displace, mix up and replace the cylinders. An intelligent mistress might carry on interesting studies in individual psychology, and up to a certain point, measure the times of resistance of the attention to different stimuli.