250 HOG CHOLEKA 



thereof. This term shall import both the plural and 

 the singular, as the case may be. 



Paragraph 12. Hog-cholera virus: The clear serum, 

 plasma, or denbrinated blood, derived from hogs sick of 

 hog cholera and free from other communicable disease 

 or diseases. 



Paragraph 13. Hyperimmunizing virus : Hog-cholera 

 virus prepared for hyperimmunizing hogs which are im- 

 mune to the disease hog cholera. 



Paragraph 14. Simultaneous virus : Hog-cholera virus 

 prepared for inoculating hogs which are to be injected 

 simultaneously with anti-hog-cholera serum for the im- 

 munization of those animals against the disease hog 

 cholera. 



Paragraph 15. Anti-hog-cholera serum: The clear 

 serum, plasma, or defibrirrated blood, or derivatives there- 

 of, containing the protective principles derived from im- 

 mune hogs which have been hyper-immunized by an in- 

 travenous injection of at least 5 cubic centimeters, per 

 pound body weight, of the virus of hog cholera. 



Paragraph 16. Immediate or true container: The 

 unit, bottle, vial, ampule, tube, or other receptacle or con- 

 tainer in which any virus, serum, toxin, or analogous 

 product is customarily sold or distributed. 



Paragraph 17. Serial number : The number given each 

 batch of virus, serum, toxin, or analogous product to 

 identify the said virus, serum, toxin, or analogous prod- 

 uct with the records of preparation thereof. 



Paragraph 18. Return date: The date placed upon 

 trade labels affixed to or used in connection with imme- 

 diate or true containers of viruses, serums, toxins, and 

 analogous products by producers to indicate the limit 

 of time during which the said products may be expected 

 to retain their full strength or potency. 



Paragraph 19. U. S. Released: That veterinary bi- 

 ologies so marked have been prepared and tested in ac- 



