of laminitis.

_Symptoms_.--In our cases we get very little beyond a magnification of such
symptoms as we have described under acute synovitis. The heat and the pain
is perhaps greater, and the lameness more marked. It is rather to the
constitutional disturbance we must look, however, for a confirmation of our
opinion that arthritis is in existence. This is always severe, and of
an acute febrile nature. The pulse is fast, thin, and thready, the
respirations enormously increased, and the temperature high. The appetite
is in abeyance, the animal quickly becomes what is termed 'tucked-up,' or
greyhound-like, in the body, and patchy perspirations break out about him.
The limb is held with the joints all semiflexed, and severe and intense
throbbing pains are indicated by the frequent pawing movements the animal
makes in the air. Manipulation of the foot is resented, and the agonizing
intensity of the pain so caused is shown by the drawn and haggard
appearance of the eyes.

In a favourable case the symptoms from now onwards may gradually subside.
The appetite returns, the breathing and other signs of disturbance show a
return to the normal, weight is placed on the limb, and resolution slowly
but surely takes place. In many of these, our favourable cases, however,
resolution is incomplete, and recovery only takes place at the expense of
anchylosis of the joint, a condition we shall refer to later.

In unfavourable cases, and these unfortunately are only too common, the
condition terminates in suppuration.

(c) PURULENT OR SUPPURATIVE ARTHRITIS.

_Definition_.--By this term we indicate an arthritis complicated by the
formation of pus within the joint.

_Causes_.--The organisms of pus may infect the joint by extension of a
suppurating process from without. For example, in the case of a suppurating
corn, in quittor, in tread, or in the case of a suppurating wound caused
by a prick, the pus formed may in many instances be very near the capsular
ligament of the articulation. Under such circumstances, unless there is a
free and unhindered flow of the pus from an outside opening, inroads will
be made by it upon the thin capsule. The latter is quickly penetrated, and
pus is admitted to the interior of the joint.

In other cases infection of the joint may proceed from within, from a
poisoned state of the blood-stream. The condition occurs, for instance,
in bad attacks of laminitis. We ourselves, too, have seen two cases where
s