freezing temperatures 9 



Potatoes 



Freezing-point determinations were made on 14 different commer- 

 cial varieties of potatoes, and these averaged 28.9° F. 



SWEETPOTATOES 



The results of freezing 17 more or less common varieties of sweet- 

 potatoes are presented in table 3. The variety with the lowest 

 freezing point was Mullihan. one of the less known varieties, which 

 froze at 27.6° F. The highest freezing points were found with Pump- 

 kin and Yellow Jersey varieties, both of which froze at 29.0°. 



Tomatoes 



The freezing-point temperatures of 17 commercially grown varieties 

 of tomatoes are presented in table 3. These tomatoes were all grown 

 under the same conditions at Arlington Farm. Determinations were 

 made on both field-ripened and mature-green tomatoes such as are 

 usually shipped to distant markets. The lowest freezing point 

 (29.8° F.) of ripe tomatoes was found in the Xew Glory variety. The 

 Marglobe and Livingston Acme varieties both froze at 30.7°, the 

 highest freezing point in any of the varieties studied. There was no 

 difference in the average freezing points of ripe and mature-green 

 tomatoes. 



Sweet Corx 



Four varieties of sweet corn were studied, all in the milk stage. 

 The freezing point varied considerably with the age of the product, 

 and there was also considerable variation among varieties (table 3). 



Miscellaneous Vegetables 



The freezing points of three varieties of onions, four of lettuce, two 

 of carrots, two of cantaloups, two of watermelons, and three of peas 

 are also given in table 3. The freezing points of several other kinds of 

 vegetables where only one variety of each was studied are given in 

 table 4, together with the average freezing point of all of the vegetables 

 listed bv varieties in table 3. 



