9 o 



Journal of Agricultural Research 



Vol. XX, No. a 



Table III. — Germicidal efficiency of Dakin's solution against Staphylococcus aureus, 

 with and without boric acid a 



Concentration of NaOCl. 



I to IOO 

 I tO 200 



i to 400 

 i to 800 



Without boric acid. 



Exposed 15 

 minutes. 



Exposed 1 Exposed 2 

 hour. hours. 



+ 



With boric acid. 



Exposed 15 

 minutes. 



Exposed 1 

 hour. 



4 

 + 



Exposed 2 

 hours. 



EXPERIMENT 5 



1 to IOO 

 1 to 200 

 1 to 400 

 1 to 600 

 1 to 800 



4 



-U 



+ 



+ 

 + 

 + 



4 



a + signifies growth; — , no growth. 



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

 against Staphylococcus aureus, Bacillus pyocyaneus, and B. typhosus, in the presence 

 of 50 per cent blood serum ° 



experiment 6 



EXPERIMENT 7 



Chloramin T: 

 1 to 200 . . 

 1 to 300 . . 

 1 to 400 . . 

 1 to 500. 

 1 to 600. . 

 1 to 800 . . 

 1 to 1,000. 



No test 



do... 



..do... 



+ 

 + 

 + 

 + 



No test , 



..do... 



..do... 



+ 



4- 



+ 

 No test . 

 ..do... 



4- 



4- 

 No test 

 ...do... 



4- 



4 



No test 



4 



4 



No test. 



0+ signifies growth; — , no growth. 



