L 



XI. B, 5 Boynton: Rinderpest in Swine 235 



and the temperature returned to normal. During this period the 

 animal presented a clinical picture of suffering from a mild 

 attack of hog cholera. November 26 pig 239 was returned 

 to the quarantine shed, where it remained until it was used, 

 and did not develop a rise in temperature or show any symptoms 

 of sickness during this period. 



February 14, 1916, pig 239 was inoculated with 20 cubic cen- 

 timeters of blood from bull 3993, which had been bled to death 

 February 13 for virulent blood to be used in immunization work. 

 The blood that was inoculated into the pig had been kept twenty- 

 four hours in the ice box. 



History of bull 3993 from which the blood was taken : 



February 5, 1916: Drenched with 100 cubic centimeters of urine 



from pig 242 (experiment 35). 

 February 9 : First rise of temperature, regristering, p. m., 40.5° C. 

 February 12-13: E. L. 



February 13: Bled to death for virulent blood to be used in im- 

 munization work. 



Pig 239 did not develop a rise in temperature or show any 

 sjonptoms of sickness from this injection and afterward was 

 exposed in shed No. 3, where the animals sick with rinderpest 

 were kept, and continued to give the same negative results. 



EXPERIMENT 20 



Pig 154. — Known history prior to the experiment: This 

 animal was a Berkshire, about 1 year old; it was brought to 

 the laboratory from the Bureau of Agriculture experiment station 

 at Alabang on October 13, 1915, and was kept in quarantine at 

 the laboratory one hundred thirty-two days before it was 

 used. During this period the animal did not show a rise in 

 temperature. January 10-11, 1916, it had diarrhoea, which 

 was undoubtedly due to dietetic conditions. 



February 23, 1916, pig 154 was inoculated with 8 cubic cen- 

 timeters of blood from cow 3995, which had been bled to death 

 on February 21 for virulent blood to be used in immunization 

 work. The blood that was inoculated into pig 154 had been 

 kept forty-eight hours in the ice box. 



History of cow 3995 from which the blood was taken: 



February 11, 1916: This animal was exposed to pig 241 (experi- 

 ment 28). 



February 17 : First rise in temperature, registering, p. m., 40.2' C. 



February 20: D., E. L. 



February 21: D., N. E. On this date it was bled to death for 

 virulent blood to be used in immunization work. 



