DISEASES OF SWINE AND OTHER ANIMALS. 



95 



EXI'KKIMENT No. 20. 



Exj)€rimcnt undcrlaken as a test of the irrojiafjatioa of the disease-jioison thromjh the air. 



October 5. — A pig vras placed iu n pen between two infected ones, and separated from 

 each only by an impervions double wall of matched boards, with building-paper be- 

 tween. The only means of commnnieation was llnojigji tlic open air by means of 

 ventilators at the front and back of each pen, and the openings of which in adjacent 

 pens wa-re less than a foot 'apart. On the ninth, tenth, and eleventh days the pig had 

 an elevated temperature and was lame in the- right slioulder, the illness being evi- 

 dently rheumatic. 



On October 29tli, the twenty-fonrth day, the temperature rose 2- and remained at 104° 

 F. and upward for six days (till November 3rd). It then showed a daily diminution, 

 and by November 8th, having attained the natural standard, the pig was destroyed. 



Experiments on 3hec2>, rahhit, anddog. Inoculation willt fresh virulent pifs blood, containing 



moving bacteria. 



Remarks. 



Temjjeraliire rose 2.25'^, liut wa-s nor- 

 mal on the second day. 



Purged actively for tkree days. "When 

 inoculated the pig was in advanced 

 non-febrile stage of tho fever, and 

 the temperatui'e did not rise above 

 the normal. 



Inoculation with fresh virulent blood in tvhieh no moving bacteria had been observed. 



