Man and abnormal man, including a study of children, in connection with bills to establish laboratories under federal and state governments for the study of the criminal, pauper, and defective classes, with bibliographies . wide range ofmovement. The object to be touched is a white spot half an inch in diameterplaced at one of the points without the knowledge of the subject. There is a screenin front, which can be arranged to fall so as instantly to disclose the spot. There isa pendulum chronoscope (fig. 9) in connection with this, which measures the intervalof time between the falling of the
Man and abnormal man, including a study of children, in connection with bills to establish laboratories under federal and state governments for the study of the criminal, pauper, and defective classes, with bibliographies . wide range ofmovement. The object to be touched is a white spot half an inch in diameterplaced at one of the points without the knowledge of the subject. There is a screenin front, which can be arranged to fall so as instantly to disclose the spot. There isa pendulum chronoscope (fig. 9) in connection with this, which measures the intervalof time between the falling of the screen and the touching of the white spot. The For complete description, see Psychological Review, January, 1895. MAN AND ABNORMAL MAN- 169 error of the movement and its direction is determined by the apparatus for thatpurpose. The chronoscope (fig. 9) has a balanced pendulum, total length of which is 12inches, and so weighted that the time of swing is about a second and a half. Thependulum carries a small index that may be clamped instantly in any position onthe scale, which is graduated in hundredths of a second by a falling weight. Thependulum is held in preparatory position by means of a hook connected with the. Fig. 8.—Location apparatus. (Fitz.) armature of an electromagnet. When the screen falls the circuit is broken andthe pendulum carrying its index is released. The remaking of the circuit by thetouch of the subjects finger releases a clamp and catches the index, so that the timemay be read upon the scale. Professor Fitz measured some of the elements makingup the differences which exist between individuals in their power to do certain
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherwashingtongovtprin
