160 THE VETERINARY DOCTOR. 
cause an effusion of serum into the tissue. (2). The synovial sac may be 
enlarged from an injury to the tendons. In the first kind, the enlargement 
may be easily moved about and is limited to the point of the hock; in the 
second, the enlargement remains fixed and is more deeply seated, the en- 
larged sheath being felt either above or below the point of the hock, with 
more tenderness and inflammation than in the first kind. 
TREATMENT.—In new cases, foment the swelling three or four times. 
a day with warm water, dry thoroughly, and rub in about a tablespoonful 
of a lotion made of one-half ounce of tincture of arnica in 
six ounces of water. As soon as the inflammation subsides, 
use in place of this lotion one made of a half-ounce of rhus 
in five ounces of water. When the swelling is not deep and 
is very large, without involving the true joint, the wpper 
surface may be punctured by a surgeon with a small trocar, 
the fluid be pressed up and out, and diluted calendula be in- 
jected and pressed out in two minutes. Then apply a band- 
age as directed under Bog Spavin. If the pressure be omitted, the fluid 
will collect again and again. 
CaprEp Hock. 
SPRAIN OF THE HOCK. 
The tendons and ligaments of the hock are all subject to spraius rrom 
leaping, or galloping in heavy ground. The ligaments connecting the 
bones of the joints are specially subject to implication in sprains, and the 
disease will readily submit to proper treatment if taken in time; but the 
trouble is often not detected until inhammation has destroyed the elasticity 
of the ligaments, the latter becoming cartilaginous or bony. The symp- 
toms are heat and swelling in the joint, some stiffness and lameness. The 
treatment is local, such as is applicable to general Sprains. 
CAPPED KNEE. 
This is caused by striking the knee against some hard body; by heavy 
falls; by thorns or other foreign bodies in the knee. 
Symptoms.—The symptoms are a soft, elastic swelling 
on the front of the knee, with an absence of pain on 
pressure, except in case of a foreign substance being the 
cause. 
TREATMENT.—If a thorn be the cause, remove it. In 
Extarcement al recent cases, with inflammation, give frequent warm- 
iw Carrep KNEE. ater fomentations. Arnica-lotion, one part of the tince 
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