PLEURO-PNEUMONIA. 297 



adhesions so often seen connectinsc the lun'G'S with the sides 

 of the chest, does not go to prove the incurability of the 

 disease at all, as has been so often asserted, but on the 

 contrary, it goes to chow the curability of the disease, and 

 the ignorance of those who have been guilty of so bold and 

 unwarranted an assertion, thereby deceiving the honest 

 cow keeper and breeder to their great loss, and in some 

 cases to their ruin. Pleuro-pneumonia then I take to be a 

 disease simdar to typhoid influenza in the horse, affecting 

 the white membranes of the nose, mouth, windpipe and 

 chest, speedily followed by outpouring of fluid into the 

 cavity of the thorax or chest, gradually increasing in 

 volume, till the lungs are nearly submerged, solidifving 

 them, thus arresting aeration, or proper oxygenation of the 

 blood, together with shreds of plastic lymph connecting 

 and interfering still further with the action of whatever 

 healthy lung there may be left: and thus by a gradual, 

 but progressive process, the vital power gives way, and the 

 poor beast dies from suffocation, or asphyxia, in from one 

 week to two months or more — depending if the cow be in 

 calf, and what condition otherwise the animal may be in. 

 The better the condition, the longer will they live, and the 

 more likely are they to live, even Avithout medicine, thus 

 giving the lie to its incurability. (See Bronchitis.) 



Cause. Some subtle poison in the atmosphere sometimes, 

 which is not always present ; sudden and severe changes in 

 the temperature, cold, heat, dryness and moisture, easterly 

 winds, and possibly some other conditions which may be 

 present, but not recognized, and which give rise to what 

 is called the predisposing cause, for since we have those 

 various changes in the condition of the weather, without 

 producing the disease, something is wanted in the animal 

 economy to act as a predisposing cause, two causes being 



