CONTROL AND ERADICATION OF HOG CHOLERA 243 



sectional spread of hog cholera virus still exist 

 and that they must be closed as the first step to- 

 ward substantial progress in eradicating the dis- 

 ease. Only when this is accomplished can we 

 correctly appraise the lesser task that will yet 

 remain. At present the country's attitude toward 

 hog cholera eradication may be likened to that of 

 a farmer who each year sows weed seeds with his 

 grain, and then labors diligently to eradicate the 

 weeds that spring up. Let us stop sowing the seed. 



REFERENCES 



The following references have been selected from the 

 numerous publications on hog cholera because most of 

 them are available to the American veterinarian, and 

 because, as a group, they cover the subject in a fairly 

 complete and satisfactory manner. No attempt has been 

 made to include a complete bibliography. 



BIRCH, R. R., "Hog Cholera and Its Prevention," Cor- 

 nell Veterinarian, Hog Cholera Number, May, 1916. 



BIRCH, R. R., "Garbage Feeding and the Care of Gar- 

 bage-fed Swine," Cornell Veterinarian, January, 

 1918, p. 26. 



BIRCH, R. R., "Hog Cholera Transmission Through In- 

 fected Pork," Journal of the Am. Vet. Med. Assn., 

 June, 1917, p. 303. 



BIRCH, R. R., "Researches in Regard to Immunizing 

 Young Pigs, ' ' Report of the New York State Veter- 

 inary College at Cornell University, 1918-1919, 

 p. 73. 



CAHILL, E. A., "Hog Cholera Control in the East," 

 Journal of the Am. Vet. Med. Assn., January, 1919, 

 p. 314. 



