IN DOMESTIC ANIMALS. 
531 
of putriciity. In all these tumours two sorts of changes ma}' he 
observed, tlie one black, the other yellow; the first is formed by 
the colouring matter, and the second by the serous element. 
In combatting this disease the author recommends good food, 
light bleedings, repeated every three or four days, and particularly 
Veau de Rabel (diluted sulphuric acid) administered every two or 
three hours, in doses of two ounces, in a half pound of water. 
Under the influence of this mode of treatment, to which he adds 
the use of other evidently proper means, he has sometimes con¬ 
quered the mild form of the disease. 
The bloody effusions which are observed in almost all the tissues, 
the fluidity of the blood during life, and the facility with which 
its elements are separated, are, according to M. Delafond, unde¬ 
niable proofs of the primitive alterations of the blood, and, con¬ 
sequently, he considers the organic lesions as merely secondary. 
III.— Diseases of the Blood produced by Alteration 
OF THAT Fluid. 
There exists among our domestic animals certain maladies in 
which the blood drawn from the vessels remains liquid, but under 
the form of a thick and black syrup, the putrefaction of which 
speedily takes place. It is to this kind of alteration of the blood 
that M. Delafond has given the name of jpelohemie {'KtXog and 
cii[jLcc). He recognizes two species of it; the one he terms fou- 
droyante, and the other carhuncidaire. The maladies described 
by Tessier as those of the blood, the destructive intermittent fevers 
observed by M. Dupuy in sheep, and la jieme charbonneuse, are 
ranged under the first species. The charbon termed symptomatic 
composes the second. All these diseases have a great analogy 
with each other, and recognize as causes the alteration of food, 
septic emanations, and contagion. 
M. Delafond passes successively in review these different causes. 
He first examines the effect produced in animals by mouldy food, 
and which are indebted for their deleterious action to the presence 
of poisonous mushrooms, and to a principle of putrefaction. He 
then considers the pernicious action of putrid emanations on the 
animal frame, proceeding from the drying up of marshes, pieces of 
water, and pasturages inundated by rivers; and he establishes the 
analogy which exists between these putrid emanations and those 
which animals respire in stables that are ill-ventilated or filled 
with dung. Finally, he terminates these considerations by an 
inquiry into the nature of contagion as a cause of pclohemia. 
This malady is transmitted both by a volatile and a fixed virus, 
the first proceeding from certain emanations exhaled in cutaneous 
