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 . Fig. 42.—Laryngograph. which consists of a curved nickel plate covered with This plate rests againstthe larynx so that its movement up and down is communicated to the tambour B,which is transmitted by the rubber tube C to a recording tambour. Here is a tracingmade while repeating the alphabet: ALPHABET, (laryngograph) GLOSSO-DYNAMOMETEK, The glosso-dynamometer (fi
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 . Fig. 42.—Laryngograph. which consists of a curved nickel plate covered with This plate rests againstthe larynx so that its movement up and down is communicated to the tambour B,which is transmitted by the rubber tube C to a recording tambour. Here is a tracingmade while repeating the alphabet: ALPHABET, (laryngograph) GLOSSO-DYNAMOMETEK, The glosso-dynamometer (fig. 43), as its name indicates, measures the strength ofthe tongue to resist pressure. It consists of a small brass disk, A, screwed on a steel 1 Rev. internat. des Sourds-muets, 9 ® ann6e, f^vrier-mars 1894 p. 325. MAN AND ABNORMAL MAN. 191 rod attached to a scale, B. The tongue is stretched out and the subject is asked toresist the pressure of the disk A as much as possible. The scale. B indicates thelimit of this resistance. Maker, Yerdin, Fig. 43 Glosso-dynamometer. (I6r6.) PALATOGRAPH. This palatograph (fig. 44), designed by Dr. Weeks, is to record the movements ofthe palate in speech. It is composed of the following pieces: A band to fastenaround the head, with a rod, H, attached to antfther rod fixed to the band. At the
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherwashingtongovtprin
