PRACTICE OF VETERINARY MEDICINE. 
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the irritation which the loss of such power occasioned upon the 
animal’s temper induced the struggling and other symptoms which 
I mistook for colic. 
Complications of Purpura. — The complications of purpura are 
both numerous and important. The disease seldom occurs but in 
association with other maladies, and generally with scarlet fever. 
In Case II we find the disease closely associated with disease of 
the lungs, with chronic cough, and with disease of the heart ; in 
Case IV with disease of the lungs, with chronic cough, with scarlet 
fever, and also with intestinal or peritoneal disease; while in 
Case V it was simply in association with chronic cough. In 
addition to the associations named as being present in Cases II, 
IV, and V, I may allude to the bad or unhealthy state of the sys- 
tem in every one of these animals for a long time prior to the 
manifestation of purpura, a state of the system which, with truth, 
maybe denominated CACHECTIC. Now purpura in connexion with 
this state of the system, according to Dr. Copland, “ is the most 
frequent” in the human being; “indeed,” he says, “ purpura is 
eminently a cachectic malady , proceeding from causes which affect 
the vital tone and condition of the tissues, and consisting of changes 
not only in the condition of the textures, but also in the state of 
the blood. This cachectic habit of body both precedes the purpura 
and attends it, and favours the occurrence of haemorrhage, which 
so frequently takes place, and is one of the most important com- 
plications of the malady. The evidence of cachexia is, however, 
not limited to the supervention of haemorrhage, but is supported by 
the appearance of the countenance ; of the cutaneous surface, even 
before the purpura appears ; by the states of several assimilating 
and excreting functions ; and by the condition of the whole frame.” 
The natural energies, in every animal numbered as above, were in 
a morbidly depressed state, and had been, as I have just stated, for 
a considerable period previously. The subject of Case II was 
liable to colic, to catarrhs, coughs, and to swellings of the hind 
limbs. The subject of Case IY was naturally of a tender con- 
stitution, suffered occasionally from colic, and had chronic cough of 
a most violent nature arising from long existent disease of the 
lungs. The subject of Case V was also subject to chronic cough, 
to frequent and violent attacks of colic, was of a weak constitution, 
a voracious feeder, and a bad thriver ; facts which, when viewed 
in relation to purpura with reference to its nature and mode of de- 
velopment, become highly significant both to veterinary pathology 
and veterinary jurisprudence. 
Diagnosis of Purpura. — Purpura, I think, is a disease which 
admits of ready detection, even by the inexperienced practitioner : 
the suddenness of its attack in the generality of cases, its general 
