BGGS IN COLD STORAGE. 41 



bottom of cooling- coils in case of room piping-, is 

 required to pass over more eggs in its flow to the 

 return air duct or false ceiling-. The eg-g-s, then, 

 are not all exposed to the same drying- and puri- 

 fying- influence, because the air as it comes from the 

 cooling- coils is at its maximum dryness and purity, 

 and becomes impregnated with moisture and impuri- 

 ties more and more as it flows through the goods. If 

 the length of piles of goods is great from side to cen- 

 ter of room, the eggs in top and center of room will be 

 exposed to air which is much more impure and moist 

 than the eggs first exposed to the flow of air directly 

 from cooling coils. This applies more especially to 

 the gravity systems of air circulation. With forced 

 circulation, the air moves probably three or four 

 times as fast as when a gravity system is used, con- 

 sequently the air in top and center of room does not 

 carry the amount of impurities that it does if depend- 

 ing only on gravity for its motion. This fact in itself 

 is a very good reason why forced circulation is supe- 

 rior to any gravity system. 



It has been claimed that eggs will lose weight by 

 shrinkage more rapidly when stored in a room iH 

 which the air is circulated by mechanical means than 

 in a room operated on the gravity air circulation prin- 

 ciple. This assertion is based on the assumption 

 that the air is circulated at a much higher velocity 

 when forced circulation is employed, and is only 

 partly true because no account is taken of humidity. 

 If the humidity was the same in both cases, the claim 

 would be strictly true. Every intelligent housewife 

 knows that linen hung in the open air to dry, will be 

 freed of moisture quicker when a strong breeze is 

 blowing, than when the air is nearly still. The same 

 principle applies moderately to eggs in a refrigerator 

 room. With the same per cent of moisture, the more 

 rapid the circulation the greater the evaporation from 

 the eggs; but if the facts were known, it would be 



