6o 



from the number of animals attacked. I have known many 

 instances of horses who were exposed to cold winds crossing 

 ferries and other modes of conveyance contract bronchitis 

 soon after in a bad form ; also from standing in the street 

 after a sharp drive when perspiring freely. The mucous 

 membrane lining the air tubes which terminate in the lungs 

 is the seat of the disease. 



When bronchitis is associated with influenza it increases 

 the gravity of the case, and is at all times a complication to 

 be dreaded. 



Symptoms. — The premonitory symptoms are seldom 

 noticed or heeded until the disease is established. The 

 first thing complained of generally is a bad cough, as if 

 coming through a long tube. There is general constitutional 

 disturbance ; the respiration labored ; each inspiration fol- 

 lowed by several coughs; there is also tenderness about the 

 throat. As the disease progresses the appetite is lost, the 

 legs get cold, and the patient is averse to move. The mouth 

 is hot and dry, and the nasal membrane highly injected. 



During the dry stage of this disorder the feverish symp- 

 toms are well marked. The temperature of the animal may 

 rise from 98° to 105°, the pulse also increase from ;^6 or 40 

 to 65 or 70. beats per minute, and the breathing from 20 to 

 30. In the next stage of the disease, called the moist stage, 

 there is superabundance of secretion from the surfaces of the 

 tubes ; and in the case of very young or old animals this 

 cannot be expectorated, and there is danger of internal 

 drowning. Large quantities of thickened mucus accumu- 

 lates in the air passages, and hence the air, in passing 

 through, makes diff'erent sounds, according to the state of the 

 secretion, as to whether it is hard, dry, or thick ; in each 

 case a different sound is heard when the ear is applied to 

 the part. 



During the disease the respiratory murmur is weakened, 

 but there is no dullness on percussion, as in pneumonia, but 

 on the contrary, resonance. In this malady weakness is 



