METHODS OF USING ANTI-HOG-CHOLERA SEBUM 129 



fer the armpit because the skin covering it is 

 usually clean, the serum enters the tissues freely, 

 and with each step the animal takes, massage is 

 automatically applied. Very young pigs are most 



PLATE 20. Injecting serum behind the ear. The needle is thrust deeply 

 into the loose areolar tissues, and very little force is required to 

 expel its contents 



conveniently confined for injecting in the ham. 

 Heavy hogs, especially pregnant sows, are almost 

 always injected behind the ear, because it is safer 

 and more convenient to confine them standing. 

 Hogs nearly ready for market should not be in- 



