Oct. 15, 1920 Germicidal Value of Some Chlorin Disinfectants 



97 



Experiments 20 and 2 1 . — In these experiments comparison was made 

 between chloramin T, Dakin's solution, eusol, and mercuric chlorid. 

 The results are given below in Table XI. The results with mercuric 

 chlorid are included for comparison. 



Table XI. — Comparative germicidal efficiency of chloramin T, Dakin's solution, eusol, 

 and mercuric chlorid against anthrax spores, with and without blood serum a 



EXPERIMENT 20 



EXPERIMENT 21 



Chloramin T: 



5 per cent 



5 per cent 



5 per cent 



Dakin's solution: 



NaOCl 1 per cent. 



NaOCl 1 per cent. 



NaOCl 1 per cent. 

 Eusol: 



HOCl 0.75 per cent. 



HOCl 0.75 per cent . 



HOCl o. 75 per cent. 



25 per cent 

 50 per cent 

 None 



25 per cent 

 50 per cent 

 None 



2 5 per cent 

 50 per cent 

 None 



+ 



+ 

 + 

 + 



+ 



+ 



+ 



+ 



+ 



+ 

 + 



+ 



+° signifies growth; — , no growth. 



It should be noted here that in the experiments upon anthrax spores 

 the strength of NaOCl and HOCl required was in most instances greater 

 than that obtained by preparing Dakin's solution and eusol by the 

 methods described at the beginning of this paper. So in these instances 

 the solutions were made with less water in proportion to the other 

 ingredients. Aside from this change the methods of preparation were 

 the same. 



The experiments upon anthrax spores indicate that if comparison is 

 made on the basis of weight of chloramin T against weight of chlorin 



