504 CONTRIBUTIONS TO COMPARATIVE PATHOLOGY. 
summer, and more so in dry summers, when the beast does not 
obtain sufficient nourishment to supply the wants of nature. 
This disease is nearly or wholly confined to milch cows. 
Symptoms . — The first appearance of it is a kind of grunting, to 
which succeeds a stiffness of the limbs and body, and mostly of 
the fore extremities and thorax. Sometimes the cow will be one 
whole mass of stiffness, and her joints will rattle when she walks 
like the breaking of rotten sticks. The pulse is seldom much 
affected, the appetite not at all, and the milk is little, if at all, 
diminished in quantity or quality. There is no swelling of any 
part ; and thus the beast will remain month after month, and 
sometimes year after year, if a cure is not effected. 
As to the cure, bleeding and purging have always been found 
injurious. A seton of hellebore in the dewlap, and one purge 
mingled with some diuretic medicine, should lay the foun- 
dation for that tonic or cordial plan which will always have 
the desired effect, providing the beast is removed to a better 
situation. A cow that has once had this complaint will be liable 
to a relapse if returned to her old situation and exposed to the 
same exciting causes. 
Will not some of our country correspondents accept the chal- 
lenge, and prove whether Mr. Cox is right or wrong in the 
distinction which he draws? It is an important subject, and, if 
we mistake not, one that is much misunderstood. — Edit. 
CONTRIBUTIONS TO COMPARATIVE PATHOLOGY. 
By Mr. Youatt. 
No. IX. 
Tetanus, Worms in the Trachea, and Dilatation of 
the Heart in a Zebra. 
July6th,1836 . — A Zebra, sixteen years old, and that had been 
broken- winded five or six years, had a considerable tumour on the 
belly, immediately before the prepuce, and another smaller one 
on it. He was cast with considerable difficulty and danger. 
The principal tumour was of a hard scirrhous character, weighing 
more than a pound, with a pedicle about as large as two thumbs. 
A double ligature was passed through the centre of it, and 
firmly tied on either side. A ligature was also passed round the 
base of the smaller tumour. 
