. Thinking, feeling, doing . musclesoften show symp-toms in early life. Itis well to test thesteadiness of thehand in children. A very convenient method of study-ing the trembling of the hand is shown in Fig. 36. Thecapsule is connected with the recording capsule as a tongue-capsule, as in Fig. 37, we are able totell how still the tongue can be held. If it should beproven possible by the trembling of the tongue in child-hood to foretell which persons would become talkative inlater life, precautionary measures might be taken. The most interesting fact about these experiments in \ Jjjj
. Thinking, feeling, doing . musclesoften show symp-toms in early life. Itis well to test thesteadiness of thehand in children. A very convenient method of study-ing the trembling of the hand is shown in Fig. 36. Thecapsule is connected with the recording capsule as a tongue-capsule, as in Fig. 37, we are able totell how still the tongue can be held. If it should beproven possible by the trembling of the tongue in child-hood to foretell which persons would become talkative inlater life, precautionary measures might be taken. The most interesting fact about these experiments in \ JjjjL 1 \w£\ fEU lfc|in5Sf2?f-r- —^^ % 11| Fig. 3; Steadiness in Standing. Steadiness and Control. 71 steadiness is that the will is to have a steady position but „,.„ J r Will as opposed the execution is defective. As the will is exerted the to execution,steadiness of position is increased. This is sometimes somarked as to be visible to the eye directly. I have seenthe scalpel tremble in a surgeons hand so that a serious. Steadiness of Fig. 36. Studying the Trembling of Fig. 37. Studying the Stead- the Hand. iness of the Tongue. accident appeared inevitable ; yet when the supreme mo-ment came the hand guided the knife with admirablesteadiness. Proceeding from steadiness for position we come tothe question of steadiness of movements. Owing to the movements,difficulties of apparatus, this subject has not received somuch study as the other. There are, however, severalvery practical and simple experiments that can be made. In free-hand drawing it is frequently desirable to make . Drawing a a straight line. The line as actually made is always straight line,more or less irregular. I once proposed the followingproblem : Suppose we desire to draw a line ioomm long,what is the most accurate method of making it straight?As it was most important to know the facts for schoolchildren, the experiments were performed on ten boys all sat at their desks in just the same po-sitions.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectpsychop, bookyear1895
