Tuberculosis. 



the skin, and beginning ten hours later, a second series 

 of temperature readings is taken. From a comparison 

 of the temperatures before and after the injection of 

 tuberculin, the condition of the individual animal is 

 determined. 



Details of making the tuberculin test. The first 

 series of temperatures must be taken in order to deter- 



FIG. 14. A TUBERCULOUS ANIMAL. 

 An advanced case of generalized tuberculosis. Six 

 weeks before the photograph was taken the ani- 

 mal was in as fine condition as the one shown in 

 Fig. 13. 



mine the normal temperature of the animal, since the 

 temperature of the cow is not constant like that of man, 

 but varies from hour to hour in the same animal and in 

 different individuals. The average temperature of 

 healthy milch cows ranges from 101 to 102 F. The 

 temperature of fat stock and calves is higher ; of old and) 



