244 



TRANSLOCATION IN PLANTS 



3 5 



Days 



Fig. 13. — Change in sap concentration in the ovules of fertilized and unfertil- 

 ized cotton bolls. Grams of sugar and milligrams of nitrogen per 100 grm. 

 water in ovules of normal groups (continuous line) , and unfertilized group (broken 

 line). The average concentration in the bark of the fruiting branches is shown 

 by the short horizontal Unes on the left of the graphs. (From Maskdl and 

 Mason.) 



