ABSTRACT 



A large-scale experiment was conducted in a lagoon, off the Galveston 

 Ship Channel in the Gulf of Mexico, to determine the feasibility of using 

 copper ore as a control for destructive plankton blooms. A chemical 

 and biological study was made of the lagoon for a period of 9 months 

 previous to the addition of 60 tons of copper ore. Comparison with a 

 similar studj- made after the addition of the ore revealed that the ore did 

 not have the desired qualities of control; therefore its use for control was 

 not recommended. 



