EXPERIMENT STATION REPORTS. 



133 



Pigs weighing less than 100 lbs. can be easily held in this way. 

 Larger hogs may be thrown on the back with the hind legs spread 

 apart and held securely. Hogs weighing over 200 or 300 lbs. can be 

 treated while standing by inserting the hypodermic needle into the 

 muscles on the inside and back portion of the ham approaching the 

 hog from the rear. An assistant holds the hog firmly by the tail. A 

 ''hogholder" or rope with slip-noose may be placed over the hog's upper 

 jaw, the rope being then snubbed to a fence post. The treatment is 

 not painful to the pigs which usually cease resistance while the in- 

 jection is taking place. 



TABLE OF DOSES FOR SERUM AND VIRUS. 



Note. — The serum from a number of hogs is mixed and tested thoroughly be- 

 fore sending out. Such a mixture of blood is designated thus: Mixed serum 

 No 



The virus is secured from the pigs sick of hog cholera and is numbered accord- 

 ing to the pig from which it is drawn, thus: Virus No , or Virus Experiment 



No. . . . The doses of different batches of serum and virus will vary only slightly. 

 A maximum and minimum dose is given and when each serum and virus is 

 sent out, directions will accompany whether to use the maximum or minimum 

 dose. 



Do not underestimate the weight of pigs for the sake of saving the 

 priee of a few cc. of serum. There is much danger in using too little 

 serum, little danger in using too much. 



Place the apparatus during the treatment where it will be readily 

 accessible, free from dirt, and free from danger of destruction by farm 

 animals running wild. 



Do not use scrum for virus or virus for serum. 



Use separate syringes for virus and serum. 



Measure serum and virus in the syringe accurately for each hog. The 

 syringes used should be previously tested witji water to determine 

 whether they are discharging the proper amounts. 



When injecting material, plunge needle deeply into the muscles on 

 inside of thigh (See + in Fig. II) perpendicular to the skin and avoid 

 striking a bone. Inject the large volume of serum slowly and steadily, 

 and, when removing the needle, place the finger over the point where 

 the needle enters the skin, thus temporarily preventing return of serum 



