. Bulletin of the Department of Agriculture. Agriculture; Agriculture. FREEZING INJURY TO POTATOES WHEJf UNDERCOOLED. 13 The injury to these potatoes was not serious. All affected ones showed only a faint blotching. In the next experiment a mixed lot of 12 potatoes was held at 28° F. for 72 hours while supporting a 100-pound bag of sand. No evidence of injury was apparent. An attempt was made to show that potatoes when undercooled are liable to be injured by ordinary handling. Duplicate half-bushel lots of potatoes representing four varieties, viz, Triumph, Russet. Rural, Spaulding No. 4,
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. FREEZING INJURY TO POTATOES WHEJf UNDERCOOLED. 13 The injury to these potatoes was not serious. All affected ones showed only a faint blotching. In the next experiment a mixed lot of 12 potatoes was held at 28° F. for 72 hours while supporting a 100-pound bag of sand. No evidence of injury was apparent. An attempt was made to show that potatoes when undercooled are liable to be injured by ordinary handling. Duplicate half-bushel lots of potatoes representing four varieties, viz, Triumph, Russet. Rural, Spaulding No. 4, and American Giant, were put together in four bags and held at 28° F. for 24 hours. Then one lot of two bags was rolled across the floor for a distance of about 30 feet. After 24 hours all were removed. Examination showed the results pre- sented in Table VII. Table VII.—Freezing injury to potatoes of four different varieties held at 28° F. for 24 hours and then rolled 30 feet in a bag while undercooled. Variety. Rolled. Cheek. Triumph Spaulding No. 4. American Giant Russet Per cent injured. A similar experiment was carried out in which two lots of 12 of each of the seven varieties were placed in two bags and held at 28° F. for 24 hours. One was then rolled about 50 feet. After another period of 24 hours all were removed and held for examination. The results obtained are shown in Table VIII. Table VIII.—Freezing injury to potatoes of seven different varieties held at 28° F. for 21t hours and then rolled 50 feet in a bag ivhile undercooled. Rolled. Check. Variety. Number injured. Number uninjured. Number injured. Number uninjured. Triumph 5 12 0 2 12 8 7 7 0 12 10 0 4 5 0 0 0 0 0 0 0 12 Irish Cobbler 12 Spaulding No. 4 12 12 Rural New Yorker 12 Russet Rural 12 12 Total 46 38 0 84 A distinct varietal difference is shown here. In neither experiment did the Spaulding No. 4 variety show injury. The American Giant was also less susceptible than the rest of the var
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