MANUFACTURE OF HOG-CHOLERA SERUM 



345 



In injection of the virus it is necessary, first of all, to restrain the 

 animal in some sort of suitable apparatus. For this purpose a 

 large number of appliances and crates have been devised. Prac- 

 tically every serum manufacturer has some sort of apparatus of his 

 own for the purpose. At some plants the hog is simply strapped 

 down firmly on a flat operating table. In others it is fastened 

 in a stanchion. In the majority of cases it is secured in some 

 form of crate. The main object is to secure the animal with the 

 least amount of inconvenience and handling, and at the same time 



-Hyperimmunizing by intravenous method. 

 R. White.) 



(Photo by Dr. Geo. 



have the head accessible to the operator. The apparatus shown in 

 Fig. 63 is a very suitable one. 



Either before being placed in the crate or immediately after- 

 ward the animal should be weighed. In most plants the crates are 

 arranged on rollers, so that they can be rolled on the platform 

 scales as soon as the animal has been secured in position and the 

 weight taken. The weight of the crate is already determined 

 by previous weighing, and this, subtracted from the total weight, 

 gives the weight of the animal. These figures should then be care- 

 fully recorded on the record card of this animal. The weight is of 



