Mason — Note on Growth of Bitter Cassava. 



Ill 



Table 3. 

 Showing observed and computed values of rate at which stem elongated. 



Summary. 



1. The work reported in this paper was undertaken in order to ascertain 

 whether there was any evidence for the presence of a factor correlating the 

 activity of the cells of the apical meristem and the growth of the tuberous roots of 

 Bitter Cassava. 



2. Measurements of stem height were made weekly over a period of eighteen 

 weeks, and also at the end of the twenty-seventh week. Half the plants were 

 ringed fifteen weeks before the termination of the experiment. 



3. It was found that the rate of growth of the ringed plants was not affected 

 by the operation for a period of about three weeks ; it then commenced to lag 

 behind the unringed plants. 



