156 THE VETERINARY DOCTOR. 
apply a similar lotion of rhus in like manner. In long-standing cases 
pressure is the best treatment by far. This is best applied by a truss made 
specially for the purpose; but in the absence of one, a wet chamois-skin 
bandage may be bound firmly to the swelling, and a piece of lint put un- 
der it, the latter being wet with glycerine twice a day. Blisters are of no 
avail, but lameness has been removed by firing the affected parts. 
BONE SPAVIN., 
This is a bony deposit on the inner and lower parts of the hock-joint. 
At may be hereditary, a malformation of the joint existing at birth, though 
in this case the natural defect often does not cause lameness. The more 
common causes are galloping in heavy ground; slipping on smooth sur- 
faces; long draughts; sudden throwing of the horse on the haunches; calks 
‘on the outside of the heel, without corresponding ones inside. 
Symptoms.—tin the early stages the enlargement may not be detected, 
but the horse does not bend the hock, and shows pain if the joint be 
pressed; hops on the toe of the affected limb when turned around or put 
in motion; snatches the toe up, as in stringhalt; drags the 
limb; after a while, if not at first, a small bony tumor may 
be felt on the inner and lower front part of the joint by 
rubbing the hand over the joint and comparing it with the 
joint of the sound leg examined in a similar way. Lame- 
ness may disappear with rest, though subsequent trotting 
will renew it; but this gradually leaves upon work. The 
Bonz S eo : 
onmeravl® inside of the hock is unnaturally heated. In later stages 
inflammation of the ligaments, depositions of cartilage or bone, and per- 
haps disease of the interior part of the joint, are added, when the lameness 
increases, and is worse when first brought from the stable, diminishing 
with motion. If the tarsal bones become stiff, the horse loses condition and 
seldom lies down. 
TREATMENT.—Turn the horse loose in a stall for about a month. 
Give rhus internally three times a day, and rub into the affected part a 
lotion of one part of strong tincture of rhus to eight of water. If a dep- 
osition of bone has formed, use the following: 
Iodine, 1 drachm. 
Todide potasse, 2 drachms. 
Sulphuric acid. 2 drachms, 
Palm oil, 4 drachms. 
Mix. 
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