Oct. 15, 1920 Germicidal Value of Some Chlorin Disinfectants 103 



Table XVI. — Effect of addition of ammonia upon germicidal activity of Dakin's solution 



against Bacillus typhosus a 



EXPERIMENT 26 



without ammonia; no blood serum added 



Concentration of NaOCl. 



Ex- 

 posed 

 7% min- 

 utes. 



Ex- 

 posed 

 10 min- 

 utes. 



Ex- 

 posed 



min- 

 utes. 



Ex- 

 posed 

 IS min- 

 utes. 



I to 2,000 



i to 4,000 



1 to 6,000. . . . 

 1 to 8,000. . . . 

 Phenol 1 to 70 



+ 

 + 



+ 

 + 



+ 

 + 



+ 



+ 



Coefficient 57, 

 4,000 



with ammonia; no blood serum added 



1 to 6,000. . . . 

 1 to 8,000. . . . 

 1 to 10,000 . . . 

 i to 12,000. . . 

 Phenol 1 to 70 



Coefficient 86, 

 6 j^2= 86. 



EXPERIMENT 27 

 without ammonia; 5 PER cent blood serum added 



1 to 500 



1 to 1,000 



1 to 2,000 



1 to 4,000 



Phenol ito8o&. 



with ammonia; s per cent blood serum added 



1 to 500 



1 to 1,000 



1 to 2,000 



1 to 4,000 



Phenol 1 to 80 b . 



EXPERIMENT 28 

 with ammonia; 10 PER CENT BLOOD serum added 



1 to 500 



1 to 1,000 



1 to 2,000 



1 to 4,000 



Phenol 1 to 70 b . 



WITH AMMONIA; 50 PER CENT BLOOD SERUM ADDED 



1 to 500 



1 to 1,000 



1 to 1 , 500 



1 to 2,000 



Phenol 1 to 70 b . 



°+ signifies growth; — , no growth. 



b No blood serum added. 



