3. 



September the addition of say 0.15 inch on a 2.50 inch apple represents a 19.1 

 per cent volume gain or a 17.2 per cent increase in volume on a 2.75 apple with- 

 in two weeks. In other words, the delay in harvest of two weeks this year added 

 materially to the volume of Mcintosh picked and to individual fruit size. If it 

 is assumed that Massachusetts had 1,400,000 boxes of Mcintosh on September 12 

 with an average size of 2.75 inches in diameter and no fruit losses occurred be- 

 tween then and September 26 that an additional 240,000 boxes would be added to 

 the crop. 



Table 1 - The relationship of diameter increase to volume increase of apples 

 (assumed to be perfect spheres) , 



Apple Increase in Cubic When Apples Grow From 



Diameter Volume Centimeters per Diameter "U Volume 



Inches Centimeters Cubic Centimeters Diameter Increase (inches) Increase 



0.5 i.27 1.07 



0.75 1.91 3.65 2.58 



1.00 2.54 8.58 4.93 



1.25 3.18 16.84 8.26 



1.50 3.81 28.97 12.13 



1.75 4.45 46.16 17.19* 



2.00 5.08 68.67 ** 22.61 



2.25 5.72 98.21 29.54 



2.50 6.35 134.12 35.91 2.50 



2.55 6.48 142.53 8.41 I \ 19.1 



1 



2.60 6.60 150.59 8.06 



2.65 6.73 159.67 ^•°^iiR<;i* 2. 65 



2.70 6.86 169.10 9.43 ] 



2.75 6.99 178.89 9.79 2.75 



2.80 7.11 188.27 9.38 I V 17.2 



i 



2.85 7.24 198.78 10.51 



2,90 7.37 209.69 10.91 2.90 



2.95 7.49 220.10 10.41 



3.00 7.62 231.76 11.66 



3.05 7.75 243.82 12.06*) 



3.10 7.87 255.32 ll.SOf 



3.15 8.00 268.19 12.87 f °-^-^-^ 



3.20 8.13 281.64 13.45 \ 



3.25 8.26 295.19 13.557 



Franklin W. Southwick 



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REMINDER 



The 24" X 36" wall charts of U. S. Apple Grades for New England are still 

 available through the secretary's office of the Massachusetts Fruit Growers' 

 Association, Inc., French Hall, University of Massachusetts, Amherst, Massachusetts, 



I I I I I I I I I I I I I I I I 



