ound near a joint involving two or more bones it is liable to result
in their union (anchylosis).

_Treatment._--Applications of cold water to check the inflammatory
processes is indicated for the first few days in aseptic periostitis,
followed by hot fomentations to hurry resorption of fluids. Massage should
then be given with camphor ointment, mercurial ointment, soap liniment, or
Lugol's solution. In the chronic form point firing or a biniodid-of-mercury
blister will be found beneficial.

PURULENT PERIOSTITIS follows wounds which reach the periosteum and become
infected, as observed in compound fractures, or it may result from
advancing purulent conditions in neighboring structures, as in foul foot.
It may also occur in the course of an infectious disease, when small
abscesses are formed under the periosteum (subperiosteal abscess). It may
lead to necrosis of the bone or a fistulous tract from the bone to the
surface. There is usually much pain and fever, and the odor from the wound
is offensive.

_Treatment._--In this form of periostitis the periosteum should be freely
incised, followed either by continuous irrigation or frequent injection of
the wound with antiseptic solutions.

FIBROUS PERIOSTITIS.--This form of the disease consists in the thickening
of the outer layer of the periosteum from the inflammation reaching it from
neighboring structures. This newly formed fibrous tissue may become
ossified or may transmit the inflammation to the deeper bony structures. It
is frequently seen in cases in which there has been an intense inflammation
of the skin close to an underlying bone.

_Treatment._--The treatment should be the same as that recommended for
aseptic periostitis.

OSTEOMYELITIS.

This term refers to an inflammation of the bone marrow, which is most
commonly seen following the bacterial infection of a compound fracture and
usually results in pus formation. The bone is melted away and pus escapes
from the bone under the periosteum, involving the soft tissues. It is
principally confined to the long bones and seldom affects more than one.

_Treatment._--The bone should be opened for the purpose of curetting out
the diseased portion of the marrow cavity and removing all the necrotic
pieces of bone. This should be undertaken only by a competent veterinarian.
The after-treatment consists in tamponing the wound with pledgets of
iodoform gauze or a mixture of iodoform 1 part and glycerin 4 parts. The
wo