EXPERIMENT STATION REPORTS. 



131 



of serum, although a number of them may be saved. Serum alone may 

 be used on pigs that it is desired to show at fairs or other public places 

 for a short time where they may be exposed to infection. However, 

 Ihe '"Serum-Simultaneous- Method'' is recommended for all healthy pigs. 

 The ''Serum-Alone Method" is in no way dangerous to the treated 

 animals or to those associated with the treated. It is folloAved by a 

 very short period of immunity lasting only one to three months. 



Neither method is, as a rule, followed by any unfavorable symptoms, 

 except a slight, transitory stiffness in the hind legs, and possibly a 

 slight fever and lack of appetite for a short time, provided the animals 

 were sound when treated. 



Fig. I. Showing apparatus and instruments for immunizing pigs against 

 liog cliolera. Materials for serum, on the left ; and for \irus, on the right of 

 large dish of disinfecting solution. 



DIRECTIONS FOR TREATING PIGS. 



The following instruments and apparatus are required for treating 

 pigs by the "Serum-Simultaneous Method:" (See Fig. 1). 



(A) Bottle of serum; covered dish for holding serum (a clean. 

 tin-coA'ered jelly tumbler will answer), a hypodermic syringe Avith cc. 

 graduations, capacity 50-GO cc. 



(B) Bottle of virus; covered dish for holding virus (smaller than 

 that used for serum) ; a hypodermic syringe with cc. graduations, capac 

 ity 5-10 cc. ; a dish of disinfecting solution and cloth. 



