DAIRY MEETING. 9I 



Ans. Yes, if that is a normal one. It may be along the line 

 of safety to take more, but it is not along the line of the practical 

 working of this test. I may take the temperature of one thou- 

 sand animals at 8 o'clock at night and may inject the. mature 

 animals that have a temperature below 102^ degrees, and I will 

 not make a mistake in testing them, one time in a thousand. If 

 tKe temperature has gone up gradually, the day after the injec- 

 tion, and remained stationary for a time and gradually declined, 

 it is a normal reaction ; and the chance that an animal suffering 

 from fever of an incidental nature will exhibit that normal tuber- 

 culin reaction just the day after the tuberculin is injected, can 

 almost be disregarded. If we were to take the temperature of 

 these cattle at intervals of three or four hours, for 24 hours 

 before the injection, we should pretty nearly double the cost of 

 the test, and in that way render it somewhat impracticable. In 

 giving the method I do, I do not claim that it is the most approv- 

 ed way that the test could possibly be made, but I believe it is 

 the most practical way, and the errors will be very rare. We 

 must have the work done as cheaply as we can without sacrific- 

 ing safety in order that the test may be a practical one. 



Ones. Do you say that after the 4th time of taking the tem- 

 perature, if it is found continually rising, it means that the bacilli 

 are present? 



Ans. Sometimes we have a delayed reaction, but usually we 

 get the highest temperature certainly within 18 hours ; some- 

 times it comes as late as 22 hours. If at 18 hours after injecting 

 the tuberculin we find the temperature somewhat elevated, going 

 up a little, and we are not quite satisfied, it is not high enough to 

 consider it a reaction, we will continue to take the temperature 

 of that animal once> or twice more. \\'e occasionally get a reac- 

 tion with the maximum temperature, that we would not have 

 considered a reaction at the fourth taking of the temperature. 



Ques. The reaction indicates the presence of the bacillus? 



Ans. Yes, of growing germs. 



Ques. Is it not a fact that the majority of animals reach the 

 maximum temperature at 14 or 16 hours? 



Ans. They usually reach the maximum at about the 15th or 

 i6th hour. The younger the animal, as a rule, the earlier the 

 rise to maximum temperature. 



