356 VETERINARY SURGICAL THERAPEUTICS. 
bling, the /#7ii/ of English authors. “This peculiar trembling is observed 
and also heard as well as it is felt by the touch; it is composed of a sound 
and avibration. This sound and vibration are continued and are increased 
in connection with the cardiac systole ; they are perceived especially at the 
level of the tumor, where they are greatest, but they can be detected at 
some distance from it... . The sound of this thrill has been compared 
to the buzzing of a bee, the purring of a cat, the whizzing of a top, of a 
mill, to the noise of the red iron dipped info water. . . . The vibration 
is so characteristic that, felt once, its character and nature are never 
forgotten.” (Michaux.) 
Cagny has described an arterio-venous mesenteric aneurism. The 
cases of Chauveau, Collin, Nocard, Moreau, are interesting. In the 
first, it was a tumor, as big as an egg, situated along the course of right 
maxillo-muscular artery and vein, outside and a little back of the inferior 
jaw. This tumor, easily reductile, would return as soon as pressute 
ceased; the hand felt in it a very strong pulsation, isochronous to the 
systole of the heart; the vibrating thrill was readily perceived, At the 
post mortem, the tumor was found to exist on the tract of the vein and 
communicated with the artery; it measured eight centimeters in length 
and about four in width. Both vessels were dilated at the seat of the 
aneurism.’ 
The case of Collin relates to a young steer, castrated ten months be- 
fore by a gelder. Both cords had been twisted and then torn. The 
animal presented in the scrotal region, a tumor, egg-like, indolent, vety 
soft and elastic. ‘In pressing it gently, one could feel the beatings cor- 
responding to the cardiac systoles; to which succeeded without interrup- 
tion, well marked and characteristic vibrating thrills.” When the subject 
was killed, at three years old (thirty-two months after castration), the 
tumor measured from fifteen to twenty centimeters in height and about 
thirty in circumference. The dissection, made by Lesbre, showed that it 
‘was produced by the great testicular vein and artery enormously dilated, 
elongated and communicating together. 
In a fifteen year old gelding, Nocard found a soft, elastic tumor, as 
big as the fist, occupying the left side of the sheath, some centimeters 
back from its anterior opening. It was the seat of beats isochronous to 
the arterial pulsations, and each of these was followed by aseries of vibrat- 
1In the case of H. D. Hanson of a horse that had died during an attack of colics, 
he found at post mortem: ‘ta large growth of the size of a cabbage head, of hard 
consistency, situated in the lumbar regions towards the base of the czecum, which on 
being removed proved to contain a large abscess in its center communicating with 
the ileocecal artery and involving the right fasciculus of the great mesentery.” 
—Amer. Vet. Review, vol. xix., page 706. 
