ELEMENTS 



143 



tion of the anaerobes. In the nascent state especially, as 

 liberated from ozone (O3), hydrogen peroxide (H2O2) and 

 hypochlorites (Ca(C10)2), it is strongly bactericidal. 



Fig. 102. — Apparatus for sterilizing water with liquid chlorine. 



Chlorine.— Chlorine is actively disinfectant and is coming 

 into use for sterilizing water on a large scale in municipal 

 plants (Fig. 102). 



Iodine finds extended use in aseptic surgical operations 

 and antiseptic dressings. Bromine, mercury, silver, gold, 

 nickel, zinc and copper are markedly germicidal in the 

 elemental state, but are not practical. 



