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AGRICULTURAL BACTERIOLOGY 



considerably in different animals, and even in the same 

 animal at different times of the day. The temperature of 

 healthy milch-cows may range from 100 F. to over 102 F. 

 The temperature of calves and fat stock is usually higher, 

 while that of aged or weak animals is lower. The vari- 

 ations that may be noted in a well kept, healthy animal are 

 illustrated in the following table, in which are also given 

 the pulse and number of respirations a minute. Exercise, 

 excitement, and hot weather tend to increase the tempera- 

 ture. The drinking of large quantities of cold water lowers 

 the temperature for some hours. 



Temperature, Rate of Pulse, and Respirations per Minute 



The temperature should be taken four times at two-hour 

 intervals before the injection of the tuberculin. The in- 

 jection is made by means of a hypodermic syringe, usually 

 just back or in front of the shoulder. It may be injected 

 wherever the skin is thin and loose. The needle is inserted 

 through a fold in the skin. Care should be taken in in- 

 serting the needle to see that it penetrates through the skin 



