638 Proceedings of Royal Society of Edinburgh. [sess. 
Restoration of localised sensation conld not be ascertained, but 
undoubted evidence of sensation was obtained on the 10th day. 
On the 14th day the supporting plaster of Paris splint was 
removed, and the wound was found healed. The animal then 
used the leg perfectly, almost always placing the plantar surface 
of the paw on the ground correctly. 
By the 19th day the dog had practically completely recovered 
from the effects of the operation. 
On the 54th day the nerve was again exposed, and was found 
united in the position in which it had heen sutured. Stimulation 
above, below, and on the seat of reunion gave the normal contrac- 
tions in the muscles of the leg. 
Exp. II. — Division of sciatic nerve at level of trochanter : rotation 
of peripheral segment to extent of semicircle and suture. 
In a few days the animal was walking about on its splinted leg, 
but dragging the paw along the ground dorsal surface down. 
On the 7th day it was first noticed that the plantar surface of 
the paw was correctly placed, and, although occasionally turning 
over on the dorsal surface, was on these occasions voluntarily 
replaced in position after two or three steps. 
By the 21st day distinct evidence of sensation was exhibited, 
and the recovery of the normal use of the limb was practically 
complete. 
The physiological examination of the nerve on the 30th day 
showed it to be united in the position in which it was sutured, and 
to have regained its normal irritability and conductivity. 
Exp. III. — Division of sciatic nerve at level of trochanter: accurate 
coaptation by suture in normal position. 
On the 7th day the animal first showed signs of recovery of 
function, as, for the first time, it was then noticed that it walked 
placing the plantar surface of the paw on the ground. It was not, 
however, able to voluntarily readjust the paw when it happened 
to turn over with the dorsal surface down. This power was, 
however, exhibited on the following day, 
