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PROFESSORS D. FERRIER AND G. F. YEO ON THE EFFECTS OF 
Experiment 14*. 
In this animal the middle temporo-sphenoidal convolution was exposed in its upper 
half on both sides, and both were similarly operated on. With the aid of a director 
slipped between the dura mater and the cortex, a wire cautery was passed along the 
course of each convolution with the view of destroying it and its medullary con¬ 
nexions. This could only be done approximately, and as a matter of fact, as will 
be seen from the post-mortem account, the curve of the cortex was not exactly 
followed. 
After the dressing of the wound the animal was awake, the eyes were open, the 
pupils equal and contractile, and the conjunctival reflex distinct in both eyes. 
Half an hour after the operation the animal when called to opened its eyes and 
looked up. When it was sitting quietly afterwards with its head between its knees, 
a splashing of water was made, whereupon it looked up and came to the bars of the 
cage looking for some. 
As regards hearing therefore there was already satisfactory proof. Tactile sensi¬ 
bility was also apparently unimpaired, as it withdrew its hands or feet, when these 
were touched in such a way as to be entirely out of the animal’s range of vision. 
Two hours subsequent to the operation the animal was running about. Hearing 
was acute, the animal frequently stood listening to the Monkeys in the neighbouring 
cage. Sight was perfect, and tactile sensibility unimpaired. 
Next day the animal seemed in every respect normal. Some experiments were 
made in reference to taste. This was evidently not abolished, as gooseberries on 
which some aloes had been sprinkled did not seem to be relished. 
Four days later further experiments on this point were made, and comparison 
was instituted between this animal and that of Experiment 13, which was for the 
time its companion. No. 13* would not eat pieces of orange sprinkled with colocynth, 
but No. 14*, though evidently disliking the bitter taste, eat several pieces. 
The explosion of a percussion cap while the two were engaged with their food 
caused No. 14* to start while No. 13* paid no attention. 
That the animal continued to see, hear, feel, and taste was verified by repeated 
tests during a fortnight’s daily observation subsequent to the operation. 
Owing to some oedema of the cheeks, as if from too great tightness of the dressings, 
the bandages were cut. Next day the dressings were found entirely pulled off, and a 
small slough of the scalp was found to exist, but the edges of the incisions were 
healthy. No further observations were made of the animal, it being to all appearance 
quite well, but it died three weeks after the operation, the slough of the scalp not 
having healed. 
Post-mortem examination .—The openings in the skull situated on each side below 
the parietal eminence were covered over by recent membrane, and there was no hernia 
cerebri, and there was no effusion. But on removal of the brain it was found that 
