Generali Diseases. 345 
‘scrofula, rheumatism, or mercurialism. The cancellated 
‘structure of the bone is the seat of inflammatory action. 
Symptoms.— Heat, pain, swelling of the integument over 
the affected portion of bone; sometimes enlargement of 
the latter,extreme tenderness on manipulation (often mis- 
taken for rheumatism), and the patient exhibits more or 
less inflammatory fever. If ostitis is confined to a limb, 
there is attendant lameness, or the limb is not used. 
Treatment.—Perfect quietude, soft comfortable bed, hot 
fomentations, or linseed poultices; and, subsequently, if in- 
flammatory action is protracted or enlargement persists, 
the application of iodine paint, and administration of iodide 
of potassium is indicated. 
In 1884 I received a cross-bred mastiff dog into my 
infirmary, affected with cranial ostitis, caused by a violent 
blow with a poker, over the right parietal bone. Blisters 
and setons were employed, with general antiphlogistic 
treatment, and the patient made a good recovery. 
PERIOSTITIS. 
Periostitis, or inflammation of the periosteum, may be 
associated with ostitis, but is frequently met with in 
‘canine practice as a distinct affection. The inflamed con- 
‘dition of the membrane causes it to become highly 
vascular, thickened, and detached from the bone under- 
neath, and, as in the case of “splent” on the horse’s leg, 
osseous deposit is frequently deposited between the bone 
and periosteum, causing a permanent zode or exostosis. 
Periostitis in the limbs of a dog is very often caused by 
external violence, as a blow from a stick, stone, or kick. 
It occurs also in connection with the teeth and jaws, and 
under such circumstances is attended with acute suffering. 
At the present time I have a colley dog in the hospital, 
which has for a considerable time been a martyr to inflam- 
mation.of the alveolo-dental periosteum. The removal of 
a molar tooth with an exostosed: fang afforded immense 
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