448 
DE. D. EEKKIER ON THE BEAIN OE MONKEYS. 
attempt to enter or seek its companion, who calls for it anxiously. When urged to 
move, it ran against obstacles held in its path. 
It was adjudged to be blind. 
5 p.m. The bandage was now removed from the left eye. After a few moments of 
apparent stupor and unwillingness to move, it ran when touched, avoided obstacles 
which formerly it had run against, and made its way to its cage and jumped up beside 
its companion. 
The animal had evidently recovered its sight. 
On this being established it was again placed under chloroform, and the superior 
temporo-sphenoidal convolution was destroyed in both hemispheres. The results will 
be recorded subsequently (see Exp. XV. p. 461). 
Next day (April 8) at 12 noon it was taken out of its cage, and the left eye bandaged 
up as before, much against the animal’s will. When let loose it made a spring at me, 
and then galloped away into the other room and made for its cage. Followed its 
companion out of the cage a short time after, and found its way in again and jumped 
on the perch. Retired from the perch when I approached making mouths. 
Vision therefore had returned in the right eye. 
The subsequent history and post mortem examination of this animal will be found on 
p. 461 et seq. under the head of Exp. XV. 
This experiment completely confirms the former two as to the fact of blindness being 
caused in one eye on the destruction of the angular gyrus of the opposite hemisphere. 
The important fact noted in Exp. VII. is also confirmed, viz. that within a very 
short period visual perception becomes again possible with the same eye, notwith- 
standing the lesion. 
The next experiment relates to the effects of destruction of the angular gyrus on both 
sides. 
Experiment X. 
January 8 th, 1875. — The angular gyrus was exposed accurately and clearly in both 
hemispheres of a monkey, and the animal allowed to recover from its chloroform-stupor 
2.45 p.m. 
At 8 p.m the animal had almost recovered, but was somewhat unsteady. Looks around, 
and turns its head when called to, and makes mouths as before. 
3.30 p.m. When taken away from the fire before which it had been sitting, it ran back 
to its position, looking back at me, making grimaces and mouths. 
It drank with avidity some sweet tea, of which it was exceedingly fond on all 
occasions. When the dish was removed to the other side of the room away from the 
fire, it ran to it and drank it up. 
When a light was flashed before its eyes, it turned away its head and tried to conceal 
its face in its hands. 
4 p.m. The animal having completely recovered from the operation, and being in full 
