STORAGE, RESPIRATION, AND GROWTH. 



47 



able for analysis could be obtained. The last stages of ripening, 

 therefore, could not be followed. This same observation is true of 

 the other varieties of summer apples. No sample could be obtained 

 which became fully ripe in the chemical sense that is, in which the 

 starch had completely disappeared. 



In the first sample of summer apples examined very little sucrose 



Refrigerated subsamples 



FIG. 13. Chart showing chemical changes in summer apples (Early Strawberry) during growth 



(total solids basis). 



was found, showing that the work was begun early in the life history 

 of the fruit. The content of sucrose increased steadily, however, until 

 the end of the experiment. It is specially noteworthy that the per- 

 centage of sucrose increased even while the starch was forming. At 

 the beginning of this work the sample contained a larger percentage 



