STORAGE 349 



The fresh air from the outside is first taken through water to 

 wash and rid it of germs and impurities of various kinds. The 

 water bath also lowers the temperature of the air to some extent 

 if moderately cool water is used. From the washer the air goes to 

 the tank, where it is cooled to about the temperature of the room 

 to be ventilated, and a greater part of the moisture, which contains 

 the impurities, is frozen to the surface of the cooler. From the 

 cooling tank the air is passed through the drying tank, to rid it of 

 any surplus moisture, and then goes to the coil room or storage 

 room, as the case may be. A dry and pure air may be assured for 

 the storage rooms by passing it last over chloride of calcium. 



When the temperature of the outside air is about the same as 

 that of the storage room, and the atmosphere is clear and dry, it is 

 safe to force large quantities of fresh air into the rooms directly 

 from the outside without previously treating it. When the outside 

 air is too cold to use in this way, it should be warmed by passing 

 over a steam coil, or in some other way, to make it of about the 

 same temperature as the room to be ventilated. If it is desired to 

 heat the storage room to prevent freezing, the air may be heated 

 to a somewhat higher temperature. In a fairly large house separate 

 systems are used for warm and cold weather ventilation, but in a 

 small house one may answer for both purposes by a proper arrange- 

 ment of air ducts. 



Cold storage in transit. Sometimes the apples are stored for a 

 short time when part way to their destination. This is called storage 

 in transit. Apples shipped from the West are often placed in cold- 

 storage plants at Duluth, St. Paul, or Minneapolis, pending ship- 

 ment to a more distant market. The cost of this transfer is 10 cents 

 a hundred above the rate to the final destination. This method 

 may help the growers to wait for a better market, but it is not the 

 best practice, owing to the expense involved. The growers would 

 do much better to have several community storage plants in the 

 various Western fruit regions, in which they could store at reduced 

 cost and with more certainty of proper handling than in the other 

 storage plants mentioned. 



Precooling. The Western apple-growers have found it to be a 

 decided advantage to precool the fruit. Three methods for accom- 

 plishing this are in use: (I) the apples may be precooled in an 



