162 
TUMOURS IN THE BRAIN. 
the lungs, but other parts of the body, are alike preserved in 
healthy activity. In the absence of this, the textures of the 
lungs become flaccid and weak, and lose their healthy resi- 
liency and contractile power. Under these conditions, in 
fact, they become gradually atrophied , which is the essence of 
the disease known as “ broken wind.” 
The healthy vigour of all the functions of the body is best 
maintained by their equal and moderate exercise. The mus- 
cular function, and with it the circulation of the blood, is the 
first to suffer from the want of it ; hence, first sluggish move- 
ments, and ultimately weakness of the heart and other 
muscles — causing deficient and disordered secretions, general 
plethora, over-nourishment of adipose textures, and wasting 
of muscles ; and various evil consequences of these morbid 
conditions may result from these causes, when long in opera- 
tion — such as biliary derangement, indigestion, and flatu- 
lency. The emphysematous state of the lungs, usually 
observed in dissecting broken-winded horses, is undoubtedly 
induced from disordered secretion, and not by any mechanical 
rupture of the air-cells, as is commonly imagined. 
In the view we have taken of this disease, called “ broken 
wind,” the organs of respiration closely resemble the muscles 
and other organized parts of the body. They were made to 
be used, and if left in partial inactivity their natural elasticity 
and power, or tone, are unavoidably impaired. But the mis- 
chief does not stop here. It is a very common practice with 
farmers to breed from broken-winded mares, and the pro- 
geny, in a great many instances, inherit a tendency to the 
disease, because their lungs are never normally developed 
like those of sound active animals. 
[To he continued .) 
TUMOURS IN THE BRAIN. 
At a Meeting of the “ Imperial and Central Society 
of Veterinary Medicine, Paris,” held on the 26th of 
October last, 
M. Bouley, Senior, President, in the chair. 
M. Leblanc read the following communication, relating to 
the formation of tumours in the brain, and their effects on 
the organism. 
An omnibus horse, aged about ten years, and which had 
worked well for the last four years, during which time all the 
