MAJOR PROGRAM AREAS 25 



change in the slope of the curve after the Hopcalite was in place. This observation raises 

 doubts as to whether the Hopcalite was at all effective. Possibly, CO was generated through 

 some process which was stopped when CO was suspected of being a problem. After this, the 

 CO was removed gradually by some still unknown mechanism. 



The Sealab II environmental study included an attempt to grow barley and marigold plants 

 from seeds in the Sealab atmosphere (Fig. 19). The barley seedlings did well, and were 

 healthy, but the marigold seeds produced only one sprout. Control plants were grown at 

 Texas A & M College. 



