On the BRAIN. 21 



laxatives not operating. A clyfter was given, and the laxative 

 again repeated. Next morning, his left arm and leg were quite 

 paralytic, the pupil of the left eye was dilated, and did not 

 contradl when a lighted candle was brought near it, nor was he 

 fenfible of its being there ; but he could read diftindly with 

 the other eye, and the right leg and arm were very well. In 

 the afternoon, juft forty-eight hours from the time that he met 

 with the accident, the bone was laid bare, and in the middle of the 

 right parietal bone, a piece was found to be broken off more than 

 an inch fquare. The upper fide had pierced the dura mater, and 

 gone into the fubftance of the cerebrum. The broken piece 

 was eafily taken out, and the wound dreffed. Immediately af- 

 ter, the pupil of the left eye contracted, and he could diftin- 

 guifh large objedls with that eye, and the leg and arm were 

 lefs afFedled. He had a good night, and next morning could 

 read when the right eye was fliut. On the third day after the 

 operation, when the wound in the dura mater inflamed, and a 

 confiderable tumefadlion came on, his left eye, leg and arm be- 

 came again paralytic, with frequent convulfions in the left leg 

 and arm, but without the fmallefl complaint in the other fide. 

 In this ftate, he continued for fey^ral days ; a fuppuration came 

 on ; the fwelling went off; after which he continued well, and 

 the wound healed up in eight weekc. 



From thefe cafes, I fhould infer : 



1. That when one hemifphere of the brain is afFedled, it 

 generally produces its morbid fymptoms on the oppofite fide of 

 the body. 



2. That when both hemifpheres are aflfedted, the whole bo- 

 dy fufFers. 



3. Th at though one hemifphere only is affedled, when the 

 injury is great, the whole body will fufFer. 



4. That 



