ETIOLOGY OF SCIRRHOUS CORD, ETC. 255 
meat, and prove, if possible, whether I had found the right cause 
or not. The result was as follows: 
Experiment No. 1.—May 10th, 1886, I castrated a native- 
bred colt, one year old ; removed the left testicle properly ; on 
the right side I left the posterior part of the tunica vaginalis re- 
flexa uncut, broke down the cellular tissue between aforesaid 
tunic and infundibuliform fascia; inversion was complete; the 
wound on the left side healed up readily ; right side did not heal; 
scrotum and sheath remained swollen ; colt walked with a stiff 
gait; fell off in condition ; there was a fistulous discharge from 
the wound until July 12th, 1886, when I removed the diseased 
cord, after which the wound healed up and the colt improved in 
condition at once. 
Experiment No. 2.—May 10th, 1886,1 castrated a native-bred 
colt, one year old ; operation similar to that on No. 1, but result 
was different; both sides healed about the same time; scrotum 
on right side remained swollen ; sheath would swell while colt 
was kept in stable; colt throve well. July 8th, 1886, 1 removed 
cord, enlarged and scirrhus, about the size of a goose egg; wound 
healed nicely ; no enlargement left. 
Experiment No. 3.—May 12th, 1886, I castrated a trotting- 
bred colt, one 3 T ear old ; made incision so as to produce the diffi¬ 
culty on left side; the result was a scirrhus cord the size of a 
hen’s egg, which I removed June 19th, 1886, at the urgent re¬ 
quest of the owner, who was anxious to have his colt right ; scro¬ 
tum and sheath were somewhat swollen until after the wound 
healed from the second operation. 
Experiment No. 4.—May 15th, 1886, I castrated a grade 
percheron colt, one year old ; operation similar to the preceding 
one; both wounds healed up; scrotum swelled considerably, and 
remained so ; walk was somewhat stiff in hinder extremities; re¬ 
moved cord July 25th, 1886; it was scirrhus and enlarged, about 
the size of a goose egg; tumefaction of cord extended up into 
inguinal canal; could not remove all; colt has done nicely ; no 
perceptible enlargement left. 
Experiment No. 5.—May 16th, 1886, I castrated a native 
bred colt, two years old ; a flanker or inguinal cryptorchid; made 
