STORAGE, RESPIEATION, AND GROWTH. 31 - 



queatly with reference to immature fruit (see page 52). It is greatly 

 to be regretted that this study was not begun at an earlier date, when 

 the apples were less mature. Apparently they had reached, or per- 

 haps passed, the maximum starch content before the first sample was 

 secured, and a complete study of the life history of the fruit of course 

 could not be made with the material taken. Certain irregularities 

 in these results are due to the fact that the apples were grown at some 

 distance from Washington, and two or three days elapsed from the 

 time they were picked until they were used in analysis, these condi- 

 tions not having been sufficiently understood when the work was 

 begun. Further information on this subject is found on page 50. 

 The acid content of the apple (on the percentage basis) decreased per- 

 ceptibly throughout the experiment. 



The foregoing comments on Rhode Island Greening apples are 

 equally applicable to the results on the Northern Spy and the Wine- 

 sap apples, platted in figures 2 and 3. The similarity of the curves 

 representing the content of each ingredient is strikingly brought out 

 in figure 4, in which the three varieties are compared. 



For further comparison with these results those obtained by Dr. 

 C. A. Browne, jr., a on Baldwin apples have been calculated to total 

 solids and are presented in graphic form in figure 5. The results 

 obtained by Kulisch, 6 who worked with apples stored at cellar temper- 

 ature, have also been recalculated, using an assumed total solid basis 

 of IT per cent, and the results are presented graphically in figure 6. 



It will be noted that in all respects the results of Browne and of 

 Kulisch are analogous to those obtained in this Bureau. Doctor 

 Browne's experiment, however, was begun with apples in a more 

 immature state than was the case with the work done in the Bureau of 

 Chemistry, and for that reason more complete results were obtained, 

 although his first examination also was made after the point of maxi- 

 mum starch content was passed. The work of Kulisch was carried on 

 with two samples of apples of the same variety from the same orchard, 

 but picked from different trees. His results show what wide varia- 

 tions in chemical composition may occur in fruit of the same variety 

 grown under the same cultural conditions but on different trees. 



THE RIPENING OF APPLES IN COLD STORAGE. 



Late in August, 1902, an experimental export shipment was made 

 of early-picked Ben Davis and Winesap apples from southern Illinois 

 for the purpose of determining whether it would be profitable to place 

 these apples on the London market so early in the season. The fruit 

 had been picked about August 15. Some weeks later samples of both 



a Pa. State Dept. of Agr., Bui. No. 58. 

 &Landw. Jahrb., 1892, 21: 871. 



