486 



Journal of Agricultural Research 



Vol. XIX, No. lo 



impossible to secure even later pickings to see if this increase in reducing 

 sugar continues until the fruit is fully ripe on the tree. 



The amount of sucrose remains nearly constant at less than i per cent 

 throughout the early season. In the late season there was an increase 

 in the amount of sucrose to i}4 per cent in the late picks of California 



-^ ^ A^ /S £4^ ^3 



Fig. 3 . — Sugars in Bartlett pears from Medf ord , Oreg. : Curve i , reducing sugars in green fruit when picked 

 from the tree; curve i, total sugars in green fruit when picked from the tree; curve 3, reducing sugars in 

 collateral lots after ripening at 70° F. ; curve 4, total sugars in collateral lots after ripeningat 70°; curve s, 

 reducing sugars in collateral lots after ripening at 40°; curve 6, total sugars in collateral lots after ripening 

 at 40°; curve 7, reducing sugars in collateral lots after ripening at 30°; curve 8, total sugars in collateral 

 lots after ripening at 30°. 



fruit. The increase in sucrose in the late pickings is such that the 

 increase in total sugar shows no falling off in rate up to the date of the 

 last pickings secured. The less rapid increase in reducing sugar is 

 counteracted by the increase in sucrose. 



Curves 3 and 4 in each figure represent reducing and total sugar, 

 respectively, when the fruit reached prime eating condition in a storage 



