cing horse manifested evidence of great
pain of a nervous character. There were muscular twitchings and the leg
was held off the floor and moved about convulsively. Breathing was very
much accelerated, pulse 85 per minute, the temperature was 103 deg. and
manipulation of the hips augmented the pain.

This was not a paralytic condition and recovery resulted, yet
undoubtedly this was a case which, if not properly cared for, might have
terminated unfavorably.

Treatment.--Prognosis is decidedly unfavorable in paralysis of the
great sciatic nerve. If treatment is attempted, it is to be conducted
along the same general lines as in femoral paralysis. Particular
attention should be given to conditions which will make for the
patient's comfort, and as soon as it is evident that the affection is
not progressing favorably, the subject should be humanely destroyed.

Iliac Thrombosis.

This condition is undoubtedly of more frequent occurrence than we are
wont to grant when one considers the comparatively small number of cases
that are actually recognized in practice. It does not follow, however,
that iliac thrombosis rarely exists. Probably in the majority of
instances there is insufficient obstruction of the lumina of vessels to
provoke noticeable inconvenience. Or, if circulation is hampered to the
extent that function is impaired and manifestations are observed by the
driver, the subject may be permitted to rest a few days and partial
resolution occurs, so that further trouble is not noticeable.

As judged by lesions of the aorta and iliac arteries in dissecting
subjects, the conclusion that arteritis and resultant disorders are of
rather frequent occurrence, is logical.

Etiology.--Inflammation of the vessel walls and resultant
prolifieration of tissue together with the accumulation of clotted blood
becoming organized, serve to obstruct the lumen of the affected artery.
The cause of arteritis is unknown in many instances, but parasitic
invasion and contiguous involvement of vessels in some inflammatory
injuries are etiological factors.

Symptomatology.--A characteristic type of lameness signalizes iliac
thrombosis and the following brief abstract from a contribution on this
subject by Drs. Merillat[45], clearly portrays the chief symptoms:

[Illustration: Fig. 48--Exposure of aorta and its branches, showing
location of thrombi in numerous places. In this case (same as Fig. 49)
Dr. L.A. and Dr. Edward Merillat found t