ANEURISM. 421 



this pulsation, there is another symptom equally of importance, which 

 is the slow pulse; or, as sometimes happens, an intermittent pulse. 

 All we can add to this is, that, in our opinion, it little augments our 

 knowledge of the mysterious existence of aneurism of the aorta or 

 mesenteric arteries. 



"The following cases occur in the foreign journals: 

 " 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 communicated 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 con- 

 tinued for two days paralytic in her hind parts, then died. The pos- 

 terior aorta, at the root of the emulgent artery, was dilated to double 

 its ordinary caliber, and a tumour, osseous above and cartilaginous 

 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 internal coat was ulcerated where the 

 ossific process had taken pkce, and a clot completely blocked the dila- 



