DE. D. FEBEIEE ON THE BBAIN OE MONKEYS. 
435 
found to have been removed by a line corresponding to that described and indicated in 
fig. 1. 
The cut surface had fungated and was protruding through the openings in the skull. 
The rest of the brain had a normal appearance. 
Experiment II. 
January 13 th, 1875. — A mischievous, good-tempered, and intelligent monkey was 
placed under the influence of chloroform, and the frontal lobes exposed on both sides. 
By means of the wire cautery the lobes were severed by a transverse line cutting across 
the anterior extremity of the supero-frontal sulcus. The division was carried down to 
the orbital surface, and the severed portion of brain removed. 
The operation was finished at 4 p.m. 
4.15 p.m. The animal drank some tea held to its lips, but lay quiet and had not yet 
attempted to get up. 
5 p.m. Now moves about, which it does rather unsteadily, but evidently sees where it 
is going, as it avoids obstacles in its path. 
5.45 p.m. Sits quietly with its head down when undisturbed, and makes scraping 
movements with both hands. Expresses great annoyance when its face is blown on. 
Tobacco-smoke held to its nostrils caused it to start back and run away. 
7 p.m. Sits with its head down, engaged in picking at imaginary objects in front of it. 
Can find its way in and out of its cage when roused to action. Turns its head round 
and looks when called to, giving full evidence of its sense of hearing. 
8.10 p.m. Run out of its cage when the door was opened. Runs about and jumps on 
furniture when roused. Otherwise, when left to itself, it sits down and picks at imaginary 
objects on the floor. Took a piece of apple offered to it and ate it. 
11.15 p.m. Ran about the room when let out of its cage, occasionally stopping to pick 
up things lying on the floor, and turning round to look when called to. Climbed up a 
chair and then relapsed into its usual position with its head down, and began to pick 
away with both hands at nothing. 
January 14 th . — 10 a.m. When taken out of its cage wandered restlessly around the 
room. Took a little food offered to it, and then capsized the dish. When placed in 
its cage picked up some pieces of bread, and sat and ate them contentedly ; then rose 
and marched round and round. After this subsided into a dreamy-like doze, and then 
after a few minutes began its picking and scraping movements. 
11 a.m. Is busily engaged picking up pieces of bread lying in its cage, carefully 
scraping and eating them. Runs about the cage occasionally in a restless manner, and 
then subsides into its quiet attitude, picking and scraping among the straw &c. in its 
cage. 
5.30 p.m. When let out it ran about the room for some time, jumping on chairs &c., 
and then after sitting still for a few minutes, picking as usual, started up and ran about 
again in the same aimless manner. 
3 m 2 
