226 



Journal of Agricultural Research 



Vol. XVIII. No. 4 



and the final notes taken April 7 ; and the York Imperial stored October 

 29, and the final notes taken February 20. All the apples were in direct 

 expansion cold storage from the time of storing till October 31 and were 

 therefore well cooled before being placed in the air-cooled storage. The 

 direct expansion storage house was located at Winchester, Va., and the 

 air-cooled plant at Gerrardstown, W. Va. Hygrothermograph records 

 were kept for both plants throughout the storage season. In the direct 

 expansion rooms, the temperature was held at 0° C. (32° F.) or slightly 

 above; and the relative humidity ranged from 65 to 90 per cent, stand- 

 ing between 75 and 80 per cent during most of the storage season. In 

 the air-cooled plant, the temperature ranged from 5° to 15° C. (41° to 

 59° F.) during the period from October 31 to November 20 and through- 

 out the remainder of the storage period was fairly constant at 5° C. 

 (41° F.), seldom varying from this temperature more than 1° in either 

 direction. The relative humidity in the air-cooled plant ranged from 

 40 to 90 per cent, the daily variations often covering a large part of 

 this range. The average relative humidity was approximately 65 per 

 cent. 



TablB IX. — Apple-scald in air-cooled storage: Experiment at Winchester, Va. 



The experiments recorded in Table X were made in Wenatchee, Wash. 

 The Grimes apples were picked September 18, and the Yellow Bellflower 

 September 21. The notes on both were taken February 15. The Rome 

 Beauty apples were picked October 2, and the Stayman Winesap October 

 4. Both were removed from storage March 17 and notes taken March 25. 

 One box of each variety was used under each storage condition. The 

 average temperature of the cold-storage plant was 5° C. (41° F.) during 

 September and October, 1.8° C. (35.2° F.) during November, and 0° C. 

 (32° F.) during the remainder of the storage period. The relative hu- 

 midity ranged between 80 and 90 per cent, averaging approximately 85 

 per cent for the entire storage period. In the air-cooled plant the aver- 

 age temperature during September and October was 12.2° C. (54° F.), 



