177 



TABLE 5. 



Number of plants observed after 70 minutes 133, after 

 80 minutes 1 1 7. 



Extcnt of curvature 

 in m. m. 



Number of plants 



70 min. 80 min. 



Percentages 



70 min. I 80 min. 



3 



2V2 

 2 



IV2 

 1 







2.5 



•7.5 



25 



19 



25 



11 



10 



For the same reason, why in table 1 the observations 

 were made after 65 minutes, they were made in this case 

 after 75 minutes. The resuit is hère quite simular, as is 

 seen from table 6. 



TABLE 6. 

 Number of plants observed after 75 minutes 110. 



