DE. D. FERRIER ON THE BRAIN OF MONKEYS. 
483 
2 p.m. Drank water, but refused food. 
7 p.m. Again eagerly drank cold water. Does not exhibit any desire to eat the food, 
of which there is a plentiful supply in the cage. Goes occasionally and takes a draught 
of water. It was once at this time observed to nibble a crust of bread, but further did 
not manifest any sign of hunger. 
March 22nd . — 10 a.m. Looks very dejected, sitting quietly in a corner of the cage. 
Took a little water held up to its mouth, but would not eat. 
7 p.m. For the first time since the operation has exhibited a distinct desire to eat by 
accepting and eating a piece of bread and then drinking largely of water. This was at 
the end of the fifth day. Otherwise the animal is as before. 
8 p.m. Refused its former beverage tea, of which it used to be fond. Sits dejectedly 
in a corner of the cage, feeling its head and licking its hand occasionally. The wound 
looks well, only oozing slightly. 
11 p.m. Again offered food, but refused all the food the other monkeys seemed to 
enjoy. At last, on bqing offered a cold potato, it took it in its hands, smelt it carefully, 
and then, as if suddenly struck by a new idea, began to eat with great gusto. 
March 23 rd . — The animal looks well and less dejected than before. Walked out of 
the cage when the door was opened. Retains its muscular power and senses as before. 
Ate and drank several times during the day. Seems to have recovered its appetite for 
its former food. 
March 24 th . — The animal continues well and took its breakfast as usual. 
Today it was placed in a hamper and taken to the country, to be under my obser- 
vation during a short absence from London. 
April 10 th . — Since last observation the animal has continued well. The wound 
gradually healed up completely. The animal retained its appetite, eating and drinking 
heartily. With the exception of the defect of vision, seen particularly in the want of 
appreciation of distance, the animal had recovered perfectly to all appearance. It would 
be difficult to say what alteration in its disposition had occurred, yet it looked duller 
and less active than it used to be. 
It had, however, entirely recovered from the effect of the operation, and was used for 
another experiment to be recorded next (see Exp. XXV.). 
This experiment is remarkable as being the only successful case I have observed of 
recovery taking place after removal of a large portion of the skull and a considerable 
quantity of the brain-substance. 
The history of the animal offers some interesting features, and is a further illustration 
of the entirely negative effect as regards motion and sensation of destruction of the 
occipital lobes. The only exception was with reference to vision, which continued 
impaired throughout. In the other cases when vision was lost or impaired, it was 
found on post mortem examination that the angular gyrus was more or less affected. 
In this case also, as will be seen from the post mortem examination (p. 486), the angular 
gyrus was again the seat of lesion. 
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