350 MR. youatt’s veterinary lectures. 
although they pass the spring and summer on the mountains^ 
unsheltered, breathing the coolest and purest air; and in the au¬ 
tumn and winter are shut up in close and hot stables, where not 
a breath of pure air can reach them, except when they are driven 
daily and far through the snow to water. They, however, who 
have no upland pasture to which their cattle can be removed, 
and whose beasts rarely escape from the miserable huts in which 
they are confined and fed, lose many a cow from phthisis. Habit, 
and a constitution gradually formed by the influences of these 
changes on many a generation, had prepared the first for them, 
or had even rendered them in a manner necessary; but habit 
could not secure the others from the deleterious effect of 
empoisioned air, and unwholesome or insufficient food. 
Wanti)f Ventilation .—is one striking fact, shewing the 
injurious effect of heated and empoisoned air on the pulmonary 
system. There are some cow-houses in which the heat is intense, 
and the animals are in one constant state of perspiration. The 
door and the windows must, however, be sometimes opened, and 
then the air blows in cold enough upon those w^ho are close to 
them, and one w'ould think could not fail of being injurious. 
JSTo such thing; these are the animals that escape; but the 
others at the farther end, on whom no wind blows, and where 
no perspiration is checked, are the first to have hoose, inflam¬ 
mation of the lungs, and phthisis. 
Treatment .—On the treatment of phthisis in cattle I have little 
to say, or rather it is comprehended in what I have said of this 
disease in the horse, with some slight difference, principally 
confined to the quantity of medicine. Here even more than in 
the horse appears the necessity of early treatment, and we have 
here fairer and better scope. We have the slower progress of 
disorganization, and we have the peculiarity of cough, pointing- 
out the very commencement of it: but then, on the other hand, 
if we neglect our duty to our employers, or are not permitted to 
act in time, we have the increased difficulty, or absolute im¬ 
possibility, of removing a disorganization so slowly formed, and 
becoming, as it were, an integrant and inseparable part of the 
animal. The same medicines, but in smaller doses, afford the 
best chance of success ; but they must be long and perseveringly 
administered—much more so than in the horse, for the process 
of morbid growth was slower. Your attention, however, will be 
most of all directed to the removal of the cause of the disease, 
whatever it may have been. If that which has a tendency to 
prolong and to aggravate it is taken away, you may have a little 
iDetter chance; but, the original cause, or the deleterious adjuvants 
continuing to act, you have no chance at all. I cannot point 
