﻿XX, B, 6 



Ruediger: Germicidal Power' of Glycerin 



469 



Table X. — The action of glycerin in salt solution at room temperature on 



plague bacillus No. 3. 



Glycerin. 



Days. 



1 



2 



8 



4 



5 



e 



7 



8 



9 10 



11 



12 



18 



14 



1 



15 



Oper cent 



12.5 per cent 



25 per cent 



60 per cent 



-f 



+ 

 



-1- 

 + 







+ 

 

 

 



+ 

 + 

 

 



+ 

 

 

 





 

 



+ 

 

 

 



+ 

 

 

 



+ 

 

 

 



+ 





 







+ + 





 

 



+ 

 

 

 



+ 

 

 

 





 

 

 



Table XI. — The action of glycerin in salt solution at rootn temperature on 



plague bacillus No. i. 



1 

 Glycerin. 















Days 















1 

































1 



2 



3 



4 



5 



6 



7 



8 



9 



10 



11 



12 



13 



14 



16 



Oper cent 



+ 



-f 



+ 



+ 



+ 



-r 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



4- 



1 

 



12.5 per cent 



+ 



+ 



4- 



















































25 per cent 



+ 



























































50 per cent 































































Table XII. — The action of glycerin in salt solution at room temperature on 



plague bacillus No. 5. 



Glycerin. 



Days. 



1 



2 



3 



4 



5 



6 



7 



8 



9 



10 



11 



12 



IS 



14 



15 



Oper cent 



12.5 per cent 



25 per cent 



50 per cent 



+ 

 + ■ 

 + 

 



+ 

 -1- 

 

 



+ 

 + 

 

 



+ 

 

 

 



+ 

 

 

 



+ 

 

 

 



+ 

 

 

 



4- 





 

 



+ 

 

 

 



+ 





 

 



+ 





 

 



+ 





 

 



+ 





 

 





 

 

 





 

 

 



The results in Tables IX to XII show that the action of gly- 

 cerin on different strains of plague bacilli varies but slightly; 

 the differences are perhaps not greater than those obtained by 

 suspending the germs in plain distilled water or in plain physio- 

 logic salt solution. Of the controls (those kept in physiologic 

 salt solution), 2 strains were found dead on the fourteenth day 

 and the other 2 strains were dead on the fifteenth day. 



In 12.5 per cent glycerin 3 strains gave negative results on 

 and after the fourth day, while 1 strain gave a negative result 

 on the third day, and 3 colonies developed on the agar inoculated 

 on the fourth day. 



In 25 per cent glycerin 3 strains were killed in two days and 1 

 strain was killed in three days. 



