CHAPTER XII. 



"DISEASES OF THE RESPIRATORY 

 SYSTEM." 



There is surely no class of diseases of cows 

 that require as much skill from the veterina- 

 rian if he would make a correct diagnosis as 

 those of the respiratory system. You know 

 that the regular physician has both the subjec- 

 tive symptoms by which his patient can as- 

 sist him in arriving at a disagnosis and beside 

 he has the objective symptoms or those that 

 he can detect from physical examination. The 

 veterinarian who would be successful in dif- 

 ferentiating the diagnosis of these different 

 conditions must have a very good knowledge 

 of the anatomy and physiology of the respir- 

 atory organs, when in the healthy state and 

 he must have a systematic and careful man- 

 ner of examining the patient. Many different 

 things must be taken into consideration, and 

 it truly is a fact that the veterinarian who is 

 able to intelligently and successfully treat dis- 

 eases of cows, is and must be a good diagnos- 

 tician. 



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