38 RUEDIGER. 



to 40°. 7 C. Symptoms of cattle plague declared themselves and on the eleventh 

 the bullock was bled to death. (Chart No. 1.) 



Bullock No. 2 was inoculated with 50 cubic centimeters of filtrate b. It 

 remained well. Fourteen days later it received an injection of 10 cubic centi- 

 meters of virulent blood from which it contracted cattle plague and was bled to 

 death. (Chart No. 2.) 



Bvillock No. 3 received 50 cubic centimeters of filtrate c on the sixth day 

 of January and remained well. On the twentieth he was inoculated with 10 

 cubic centimeters of virulent blood; cattle plague soon made its appearance and 

 he was bled to death on the twenty-sixth. (Chart No. 3.) 



Bullock No. 4 was inoculated with 50 cubic centimeters of part d and remained 

 well. Fourteen days later he received 10 cubic centimeters of virulent blood; 

 he contracted cattle plague and Avas bled to death on the sixth day after inoculation. 

 (Chart No. 4.) 



Animal No. 5 remained well after a subcutaneous injection of 50 cubic centi- 

 meters of filtrate e on the sixth day of January. Ten cubic centimeters of 

 virulent blood were injected on the twentieth. On the twenty-sixth day of January 

 he was bled to death suffering from typical cattle plague. (Chart No. 5.) 



CONCLUSION". 



From the experiments previously reported and those recorded here it 

 is evident that even on carefully selecting the most porous of the 

 Chamberland filters marked "F" none have been found which allowed 

 the vims of cattle plague to pass. 



