FREEZING INJURY OF FRUITS AND VEGETABLES 



27 



20 hours. Outside leaves on the uppermost' heads of cabbage 

 snowed freezing in about 7 hours, but even in these heads freezing 

 was only about one-half inch deep after 48 hours. None of the 

 heads that lay deep in the basket showed any freezing during the 

 48-hour period. 



(7) New cabbage in a bushel basket, having a starting tempera- 

 ture of about 36° F., was placed in a 25° room. Freezing of the 

 outside of the uppermost heads began in 1 hour but did not occur 

 to the extent of one-quarter inch inward from the surface until 

 after 7 hours. 



(8) Rutabagas in a bushel bag, having a starting temperature 

 of about 36° F., were placed in a 25° room. Freezing of the out- 



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9 

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Figure 3. — Rate of cooling of rutabagas in a burlap bag and of new cabbage 

 in a crate at different starting temperatures in an 18° F. room. Packages 

 were not protected by paper. 



