Oct. 15, 19*0 Germicidal Value of Some Chlorin Disinfectants 



105 



The experiments shown in Table XVII indicate that the addition of a 

 molecular equivalent of ammonia to chlorin water decreases rather than 

 increases the germicidal value of the chlorin in the absence of organic 

 matter, but it does tend to prevent depreciation of germicidal activity on 

 the addition of blood serum. 



The experiments shown in Table XVIII were designed to determine 

 the optimum amount of ammonia. 



Table XVIII. — Effect of varying amounts of ammonia upon the germicidal value of 

 chlorin in aqueous solution ° 



EXPERIMENT 31 



WITH MOLECULAR EQUIVALENT OF AMMONIA 



Concentration of chlorin. 



I to 5,000 



i to 10,000. . . . 

 i to 15,000. .. . 

 1 to 20,000. . . . 

 Phenol 1 to 80 



Ex- 

 posed 



min- 

 utes. 



+ 

 + 



WITH ONE-HALP MOLECULAR EQUIVALENT OF AMMONIA 



1 to 5,000 



I to IO.OOO. .. . 



1 to 15,000. .. . 

 I to 20,000. .. . 

 Phenol 1 to 80 



+ 



EXPERIMENT 32 



WITH MOLECULAR EQUIVALENT OF AMMONIA 



1 to 5,000 



I to IO.OOO. .. . 



1 to 15,000. .. . 



I tO 20,000. .. . 



Phenol 1 to 80 



+ 



WITH TWO MOLECULAR EQUIVALENTS OF AMMONIA 



1 to 5,000 



1 to 10,000. . . . 

 1 to 15,000. .. . 



I to 20,000. . . . 



Phenol 1 to 80 



a + signifies growth — , no growth. 



