242 The Philippine Journal of Science ists 



November 26, 1915, bull 3979 was exposed four days in stall 

 No. 2 to pig 240, which was on its third day of temperature. 



History of pig 240 (see experiment 7) : 



November 26: N. E. Temperature, p. m. 40.8° C. 



November 27-28 : D., N. E. 



November 29 : E. L. 



This animal gradually recovered, but later contracted hog cholera. 



Bull 3979 presented no reaction to this exposure. 



December 9, 1915, bull 3979 was inoculated with 150 cubic 

 centimeters of virulent blood from bull 3963. 



December 12, first rise in temperature. 



December 13-14, N. E. 



December 14, bled to death for virulent blood to be used in 

 immunization work. 



EXPERIMENT 28 



Cow 3995. — Known history prior to the experiment: Native 

 Batanes cow, 13 years old, received at the laboratory and placed 

 in quarantine January 19, 1916. This animal was kept under 

 observation twenty-three days before it was used, and at no 

 time during this period did it have a high temperature or show 

 any symptoms of sickness. 



February 11, 1916, cow 3995 was exposed for four days in 

 stall No. 2 to pig 241, which at the time of the exposure was 

 on its second day of temperature. 



History of pig 241 (see experiment 18) : 



February 11: Temperature, a. m., 40° C; p. m., 41.8° C. 

 February 12: Temperature, a. m., 39.2° C; p. m., 42° C. 

 February 13: N. E. 



Pig 241 died during the night of February 13 and presented 

 typical lesions of rinderpest upon autopsy. 



February 17, cow 3995 presented a rise in temperature, reg- 

 istering, in the afternoon, 40.2° C. 



February 18, temperature, morning, 39.2° C. ; afternoon, 

 40.7° C. 



February 20, D., E. L. 



February 21, D., N. E., bled to death for virulent blood to be 

 used in immunization work. 



In summing up the results obtained in experiments 23 to 28, 

 inclusive, it will be noted that cattle can contract rinderpest 

 from pigs by being exposed by contact in a corral or stall to 

 pigs sick with rinderpest, although the transmission of the 

 disease does not appear to be so constant as by other methods; 

 the reason for this has not been ascertained. 



