Franz, Sensations foUoiving Nerve Division. 113 



applied to the skin was circular, 3 mm. in diameter. This instrument 

 was used instead of the usual algometer of Cattell, because it was 

 necessary to make determinations on skin areas so close together 

 that the large stimulating surface of the Cattell instrument would 

 have been impracticable; and since the object of the work was to 

 determine relative amounts of pressure causing pain, the smaller 

 instrument 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 the 

 results 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 cases 

 in which subjects have not been accustomed to note and to analyze 

 mental symptoms. On June 20th, an inmate of the Hospital during 

 a period of confusion attacked H. with a large pen knife and cut 

 him in the left arm above the elbow, the wound extending 12 cm. 

 from the dorsal side across the triceps muscle to the inner bend of 

 the elbow. The lower part of the wound is to be seen in Fig. 3. 



Immediately following the accident the patient was taken to the 

 operating room. The triceps was found to be almost completely 

 severed, and this was stitched toirether after the wound was thor- 



