ANATOMY AND PHYSIOLOGY OF THE HORSE^S FOOT. 95 
lower extremity of the limb to the part where the operation 
had been performed. The animal died in about three weeks 
The following were the results of the measurements : 
Parts of the Hoof. 
Before the Operation. 
20 Days after Operation. 
Healthy 
Foot. 
Neurotomised 
Foot. 
Healthy 
Foot. 
Neurotomised 
Foot. 
Anterior part .... 
External part .... 
Internal part .... 
Millimetres. 
68 
45 
44 
Millimetres. 
71 
46 
47 
Millimetres. 
70| 
48 
47 
Millimetres. 
74£ 
50! 
51 
The amount of growth after twenty days was therefore for 
the 
Healthy 
Foot. 
Neurotomised 
Foot. 
Anterior part .... 
External part .... 
Internal part .... 
Millimetres. 
2! 
3 
3 
Millimetres. 
31 
4! 
4 
Second Experiment. —Bay-brown gelding, twenty years 
old, neurotomised on the 3rd of March, 1852, in the left 
fore leg. The loss of sensibility in the lower part of the 
limb was complete until the animal died. This horse was 
kept in the stable from the 3rd of March until the 4th of 
June, that is ninety-two days, and during the whole of that 
period the measurements were regularly taken every eight 
days. After the 4th of June it was turned out to graze, and 
in fourteen days it was brought again into the stable. On 
its return the neurotomised limb was found to be colder from 
the knee downwards than the other, and oedematous. Soon 
after the animal chanced to slip, and this leg was so dis¬ 
placed that the hairs of the fetlock nearly touched the 
ground. On the hundred and thirty-second day after the 
operation gangrene of the foot was observed, and the horse 
died on the following day. The neurotomised < portion was 
composed mainly of cicatricial tissue, and did not contain 
any primitive tubes. 
The results of the measurements were as follows: 
