24 BULLETIN 664, U. S. DEPARTMENT OF AGRICULTURE. 
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shows that in a mechanically refrigerated room about 72 hours were 
required to reduce the eggs in the center of the package from an 
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Fie. 11.—Rate of cooling of cggs in a refrigerator car. 
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entering temperature of 87° F. to 32° F., or the temperature of the 
room. Chilling in a good refrigerator car is, of necessity, a much 
slower process, as is illustrated in figure 11, which shows that 4.5 
