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CIRCULAR 5 7 9, IT. S. DEPARTMENT OF AGRICULTURE 



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 FEB. 



15 31 

 MAR. 



15 30 

 APR. 



Figure 9. — Firmness (pressure test) of Rome Beauty apples in relation to stage 

 of ripeness during ripening at various temperatures. The letters on the 

 chart indicate the degree of ripeness, as explained on page 5. The range 

 of firmness or zone representative of each degree of ripeness is given at the 

 right. The letters are omitted from those points at which designations fall 

 within the corresponding zone at the right, as explained on pages 5 and 6. 



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SEPT. 



OCT. 





NOV. 





DEC 



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15 31 

 JAN. 



15 28 

 FEB. 



15 

 MAR. 



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15 30 



APR. 



Figure 10. — Firmness (pressure test) of Stayman Winesap apples in relation 

 to stage of ripeness during ripening at various temperatures. The letters 

 on the chart indicate the degree of ripeness, as explained on page 5. The 

 range of firmness or zone representative of each degree of ripeness is given 

 at the right. The letters are omitted from those points at which the designa- 

 tions fall within the corresponding zone at the right, as explained on pages 5 

 and 6. 



