

Ill 



Pc-r ||ier. 









Fig. 38. 



Graph ahowin- the tirc© require! to regenerate 



30> of the a&ount remoroi In 4«oreaelh& aonoen* 



t rat tone of oxygen, 



Orilnate • oo» oxygen x>«r liter* 



Abeoieea ■ tine in lays. 



From data of Table 33, 



