. The Journal of comparative neurology and psychology. In neither case did tbe testing widi cottonshow the least difference between tbe two corresponding segments of tbe body. Franz, Sensations foUoiving Nerve Division. 113 applied to the skin was circular, 3 mm. in diameter. This instrumentwas used instead of the usual algometer of Cattell, because it wasnecessary to make determinations on skin areas so close togetherthat the large stimulating surface of the Cattell instrument wouldhave been impracticable; and since the object of the work was todetermine relative amounts of pressure causing p
. The Journal of comparative neurology and psychology. In neither case did tbe testing widi cottonshow the least difference between tbe two corresponding segments of tbe body. Franz, Sensations foUoiving Nerve Division. 113 applied to the skin was circular, 3 mm. in diameter. This instrumentwas used instead of the usual algometer of Cattell, because it wasnecessary to make determinations on skin areas so close togetherthat the large stimulating surface of the Cattell instrument wouldhave been impracticable; and since the object of the work was todetermine relative amounts of pressure causing pain, the smallerinstrument was the more advisable. The subject of the experiments is II., male nurse in the Govern-ment Hospital for the Insane, age 38, of good education, and in-terested not only in getting well, but also in the results of the ex]:»er-iments. For these reasons he was excellent in co-operation and theresults were to be depended upon more than those from most patients,who may fear that the knowledge of their condition will be a hin-. FiG. 3.—Arm and hand of subject copied from photograph. Area insensi-tive to light touch marl^ed with horizontal lines. drance to their obtaining employment. His training in the examina-tion of the insane was a benefit to him in noting his o\vn condition,and his answers showed that his use of terms to describe his sensa-tions was more accurate than that of similar untrained individuals,and the results are to be depended upon more than in those casesin which subjects have not been accustomed to note and to analyzemental symptoms. On June 20th, an inmate of the Hospital duringa period of confusion attacked H. with a large pen knife and cuthim in the left arm above the elbow, the wound extending 12 the dorsal side across the triceps muscle to the inner bend ofthe elbow. The lower part of the wound is to be seen in Fig. 3. Immediately following the accident the patient was taken to theoperating room. The triceps was found to
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