96 



Journal of Agricultural Research 



Vol. XX. Xo. 2 



Table VIII. — Germicidal efficiency of chloramin T against anthrax spores, with and 

 without the addition of blood serum — Continued. 



EXPERIMENT 17 



Concentration of chloramin T. 



Per cent. 



0.5. 

 0.5. 



Control rod. 



Amount of serum. 



None 



50 per cent. 



None 



50 per cent. 



None 



50 per cent. 



Exposed 

 2 hours. 



+ 

 + 

 + 

 + 

 + 

 + 



Exposed 

 4 hours. 



Exposed 

 24 hours. 



+ 

 + 



+ 

 + 



+ 



+ 

 + 



Experiment 18. — This experiment was undertaken in order to compare 

 chloramin T and Dakin's solution. The results are given in Table IX. 



Table IX. — Comparative germicidal efficiency of chloramin T and Dakin's solution 

 against anthrax spores, with and without the addition of blood serum a 



EXPERIMENT 18 



Disinfectant and dilution. 



Chloramin T: 



2 per cent 



Do 



1 per cent 



Do 



0.5 per cent 



Do 



Dakin 's solution : 



NaOCl 2 per cent . . 



Do 



NaOCl 1 per cent. . . 



Do 



NaOCl 0.5 per cent 



Do 



Control rod. . . 



Amount of serum. 



None 



50 per cent. 



None 



50 per cent. 



None 



50 per cent. 



None 



50 per cent. 



None 



50 per cent. 



None 



50 per cent. 



Exposed 



2 hours. 



+ 

 + 

 + 

 + 

 + 

 + 



+ 



+ 

 + 



Exposed 

 4-hours. 



+ 



+ 

 + 

 + 

 4- 

 + 



+ 



+ 



+ 

 + 



Exposed 

 24 hours. 



+ 



+ 



a + signifies growth; — , no growth 



Experiment 19. — In this experiment eusol was used, the chlorin being 

 estimated as HOC1. In the dilutions there was approximately 0.128 gm. 

 HOC1 per ioo cc. The results are given in Table X. 



Table X. — Germicidal efficiency of eusol against anthrax spores ° 

 EXPERIMENT 19 



Time of exposure. 



30 minutes. 



1 hour 



2 hours .... 



3 hours .... 



4 hours .... 



5 hours .... 

 24 hours. . . 



0+ signifies growth; — , no growth. 



