222 DISEASES OF THE HEART. 



In the 'Journal Pratique' for September, 1826, are two 

 reports of aneurism by M. Chenard. A mare was led to 

 him having fistula. She could hardly, he observed at the 

 time, drag her hind legs after her. She had no sooner got 

 into the stable, than she fell on her haunches, and never 

 rose again. She was bled and purged, but died on the sixth 

 day. Internal tunic of the aorta highly inflamed; and 

 immediately behind the emulgent artery was a true aneurism 

 as large as a hen's egg. Just below was an aperture in the 

 vessel which protruded in the form of a pedicle, and commu- 

 nicated with another tumour, of the size of a child's head, 

 full of fibrous matter, laminated. A similar clot filled the 

 artery posterior to dilatation. The membranes occupying 

 the spinal marrow in the lumbar region were also highly 

 injected, and the marrow itself was softened and surrounded 

 by a serous fluid. 



Another mare, usually full of animation and energy, 

 suddenly, and without assignable cause, became spiritless 

 and incapable of work. This continued for some months, 

 when attention was directed to her loins. She turned with 

 difficulty ; shrank from pressure on the loins ; was costive; 

 and voided her dung and urine with straining and pain. 

 She was treated for nephritis, and got better ; but after a 

 very little work every symptom relapsed. Two months 

 afterwards her hind legs commenced swelling, and this went 

 on to produce ulcerations, all which subsided again. One 

 day she was seized with cramp in the near hind leg for a 

 quarter of an hour. In two months again she got so well 

 as to be considered fit for work. She performed one 

 journey; but had hardly commenced a second when she on 

 a sudden lost the use of her limbs, then fell upon her off" 

 side, uttering dreadful cries. She continued for two days 

 paralytic in her hind parts, then died. The posterior aorta 

 at the root of the emulgent artery was dilated to double its 

 ordinary caliber, and a tumour, osseous above and carti- 

 laginous below, communicated with the aorta by an aperture 

 the size of a nut, having attenuated edges. The aneurism 

 ended abruptly near the origin of the crural artery. The 



