NITRATE REDUCTASE ACTIVITY 



405 



JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEPT, OCT. NOV. DEC. 



1973 



JAN. 

 1974 



Fig. 4 Temperatxire at power-plant intake and at the cut on various 

 sampling dates from January 1973 to January 1974. When the 

 curves are the same, the plant was not operating. 



