Nov. 15, 1919 



Nature and Control of Apple-Scald 



227 



during November 3.3° C. (38° F.), during December 2.2° C. (56° F.), 

 and for the remainder of the storage period 0.8° C. (33.4° F.). In the 

 air-cooled cellar the temperatures were those given in paragraph 4, 

 page 220. All the apples were moved to a temperature of 20° C. (68° F.) 

 one week before the final notes were taken. 



Table X. — Apple-scald in air-cooled storage: Experiments at Wenaichee, Wash. 



Lot 

 No. 



Treatment. 



Cold storage 



Air-cooled storage 



Cold storage i month, then air-cooled 



storage 



Air-cooled storage i month, then cold 



storage 



Cold storage 2 months, then air-cooled 



storage 



Air-cooled storage 2 months, then cold 



storage , 



Air-cooled cellar storage 



Percentage of scald in boxes. 



Grimes. 



-)0 



42 



7 

 40 

 60 



Rome 

 Beauty, 



Stay- 

 man 

 Wine- 

 sap. 



I14 

 60 



Yellow 



Bell- 

 flower. 



Heavily 



irri- 

 gated 



69 



59 



83 



Lightly 



irri- 

 gated. 



23 

 17 



Air- cooled storage 4 months. 



o Cold storage 4 months. 



In the West Virginia experiment, the apples in air-cooled storage 

 scalded worse than those in cold storage, while in the experiment at 

 Wena tehee, Wash., the apples in cellar storage were scalded most, the 

 ones in cold storage next, and those in air-cooled storage least. The 

 results appear to be contradictory, but are really in harmony with the 

 fundamental facts. It was pointed out earlier in the paper that scald 

 development is decreased by low temperatures and also by aeration. 

 The temperatures in the cellar storage at Wenatchee and in the air-cooled 

 plant at Gerrardstown, W. Va., were higher than those in the air-cooled 

 plant at Wenatchee; and the air circulation in the first two places was 

 also poorer than that in the last. So while the results reported in the 

 table.appear contradictory so far as air-cooled storage is concerned, they 

 are in harmony with the laws of scald occurrence. Air-cooled storage 

 conditions vary greatly with the weather and with the construction and 

 management of the storage house, and the results on scald will necessarily 

 vary accordingly. The infrequency of cool nights in the fall of 191 8 

 made the management of air-cooled houses unusually difficult. 



COLD-STORAGE SYSTEMS AND METHODS 



Experiments were made at Wenatchee, Wash., and Winchester, Va., 

 to detennine the effect of ventilation and aeration in commercial cold- 

 storage plants. The apples were held at 0° C. (32° F.) or slightly above 



