BULLETIN 1063, U. S. DEPARTMENT OF AGRICULTURE. 



of doors and windows. During the curing period all ventilators 

 were kept open. During the day the windows and doors also re- 

 mained wholly or partially open unless the weather was cold or the 

 atmosphere was very moist. By means of heat and ventilation, 

 moisture was prevented from depositing on the interior of the stor- 





En 



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PERIODS 



1916-1917 



OF SEVEN DAYS EACH 











END 



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1916-1919 



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1920-1921 



50-55 ROOM 55-60 ROOM - 60-65° ROOM 



Fig. 1. — Diagrams showing the average temperature in the storage house at the Arling- 

 ton Experimental Farm, Va. 



age house. During rainy or cold weather the doors and windows of 

 the house were kept closed. 



Temperature and moisture variations- in the experimental storage 

 house were recorded by means of thermographs and hygrothermo- 

 graphs. These instruments were standardized by comparison be- 



