AND ITS BRANCHES. 
273 
that degree that the animal fell down unable to rise, at a time 
when the circulation had become tardy; the post-mortem ex¬ 
amination of the case shewing that the principal veins of the 
affected limbs had become obliterated. And M. Goubeaux, in 
his paper on Obliterations of the Aorta, (Recueil, vol. xxiii, 
p. 578), has published analagous cases. Moreover, we may 
mention, that MM. Renault, Bouley, jun., and Goubeaux, to 
whose examination the horse in question was at the time sub¬ 
mitted, all agreed, without any communication between them¬ 
selves, in the same opinion. 
PROGNOSTIC. —This is, of course, an incurable disease. In¬ 
stead, therefore, of any treatment being attempted, the owner 
was recommended to have him put to death. This was not 
done, however, until the 25th of July, during which interval 
several fresh observations were made of the case, not materially 
differing from those that have been recorded, only in so far as— 
Istly, That it was remarked that less and less exertion be¬ 
came necessary to induce the paroxysm ; indeed, a minute’s 
action sufficed at last to bring on the lameness. 
2dly, That the paroxysm became of much longer continuance, 
and was followed by greater prostration. 
3dly, That the abatement in temperature at every successive 
attack became more manifest in the superior regions of the 
limb, so that at last the arm and shoulder became cooled down, 
after exercise, to as low a degree as the inferior parts. 
4thly, That this abatement continued for a long while, even 
after the muscles had recovered their contractile power suffi¬ 
ciently for the requirements of standing. 
On the 25th of July the horse was bled to death. 
AUTOPSY. —The subcutaneous vessels of the near limb were 
found greatly more developed and injected than in the off. A 
comparative examination between the muscles of one limb and 
those of the other disclosed no difference in form or colour, with 
the exception of the scalenus muscle, which exhibited partial 
discolouration of its fleshy fibres. The cellular tissue, also, about 
where the humeral artery divides, was firmer and more resisting. 
The left brachial artery, without the thorax, at the 
point where it turns round, presented an ovoid dilatation, in 
caliber double its natural dimensions. The parietes were red¬ 
dened ; and within it was a hard resisting clot, adherent to the 
coats of the artery, which had become augmented in thickness. 
This clot reached as far as the origin of the humeral artery. 
The vessel was not completely plugged by it: blood still circu¬ 
lated through it. 
The DORSO-SCAPULAR artery had a clot in it only at the 
