420 Effective Farming 



membered in this connection. Use good serum, and give plenty of it. 

 Enough serum should be given to prevent any signs of illness in the 

 treated hogs. To get a lasting immunity it is not necessary to render 

 the hogs visibly sick from the injection. Apparently just as firm 

 immunity is secured when hogs show no symptoms of illness as when 

 they are made sick by the injection. This treatment should be 

 handled carefully, and those who have studied this question agree 

 that the simultaneous inoculation should be administered only by 

 competent veterinarians or by skilled laymen who have had adequate 

 training in its use. 



The United States Department of Agriculture does not prepare 

 anti-hog-cholera serum for sale or distribution. For information 

 as to where serum may be obtained and the help that may be had in 

 combating hog cholera, write the Bureau of Animal Industry, United 

 States Department of Agriculture, Washington, D. C., or the State 

 Veterinarian, Live Stock Sanitary Board, or State Agricultural 

 College of your state. 



211. Mineral matter and tonic for hogs. It is good 

 practice to have before the hogs at all times a mixture of min- 

 eral substances. One made of four parts wood-ashes, one part 

 salt, and one part sulfur is recommended. Another is made 

 of four parts wood-ashes, one part salt, one part iron sulfate, 

 and two parts air-slaked lime. 



A tonic recommended by the United States Department of 

 Agriculture as a powder condition, consists of the following in- 

 gredients thoroughly mixed : 



POTTND8 



Wood charcoal 1 



Sulfur 1 



Sodium chloride . 2 



Sodium bicarbonate 2 



Sodium hyposulfite : 2 



Sodium sulfate 1 



Antimony sulfide (black antimony) 1 



The powder is given with the feed in the proportion of a 

 tablespoonful to each two hundred pounds of weight not 

 oftener than once a day. 



