﻿60 The Philippine Journal of Science 1914 



Bull 3395, which remained in the corral for twenty-four hours 

 after the corral had stood empty an equal period of time, did not 

 contract the disease. It was later proved to be susceptible. 



As in previous experiments, no evidence was produced to show 

 that rinderpest infection will persist in a corral for twenty-four 

 hours. 



Experiment 10. — In view of the fact that failure had attended 

 all attempts in the previous experiments to infect animals after 

 an infected corral had been vacated for twenty-four hours, this 

 experiment was performed to make tests at shorter intervals. 

 The same corral was used as in the previous experiment. It 

 was infected by the presence of carabao 3173, at a stage of the 

 disease corresponding to the third day of febrile temperature; 

 3172, fifth day; 3171, fifth day; 3160, fourth day; 3074, twenty- 

 third day; 3100, fifth day; 3089, fourth day of febrile tem- 

 perature. All had occupied the corral for periods varying from 

 one to eight days. The movements of animals into and out 

 of the corral are shown in the notes below : 



May 25, 1911. All infected animals were removed from the corral at 

 4 p. m. The weather was dry and hot. At 4.30 p. m. bull 3073 was 

 turned loose in this corral. 



May 26. Bull 3069 was put in the corral at 9 a. m. At 4. p. m. 2 

 carabaos, 3174 and 3175, were turned loose in the corral. The weather 

 was dry and hot. 



May 27. Animals still in corral. The weather was hot in the morning; 

 there were showers in the afternoon. 



May 28. Animals still in corral. The weather was hot and dry. 



May 29. Animals still in corral. The weather was hot and dry with 

 showers during the night. 



May 30. Animals still in corral. The weather was hot with a short 

 shower just at noon. 



May 31. An.imals still in corral. The weather was hot with showers 

 during afternoon and evening. 



June 1. Animals were removed from the corral and placed in screened 

 stalls, separated one from the other. No attendants entered the corral 

 after the original infected animals were removed on May 25, and tem- 

 peratures were not taken during this time. 



Bull 3073, exposed for a half-hour interval, and bull 3069, 

 exposed for seventeen and one-half hours, developed rinderpest 

 on the same date, showing that the corral was infective at least 

 seventeen and one-half hours after the removal of the sick- 

 animals. The two carabaos, 3174 and 3175, which were put in 

 the corral after an interval of twenty-four hours, failed to 

 develop rinderpest. Both of these carabaos contracted rinder- 

 pest in subsequent experiments. 



Details of the experiment appear in Table IX. 



