FREEZING INJURY TO POTATOES WHEN 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 -bush el 
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 c 
for 24 hours and then rolled 30 feet in a bag while undercooled. 
F. 
Variety. 
Rolled. 
Check. 
Per cent 
injured. 
10 

20 
50 
Per cent 
injured. 

Spaulding No. 4 



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 24 hours and then rolled 50 feet in a bag while undercooled. 
Rolled. 
Check. 
Variety. 
Number 
injured. 
Number 
uninjured. 
Number 
injured. 
Number 
uoinjured. 
Triumph 
5 
12 

2 
12 
8 
7 
7 

12 
10 

4 
5 







12 
Irish Cobbler 
12 
Spaulding No. 4. . . 
12 
American Giant 
12 
Rural New Yorker 
12 
Russet Rural 
12 
Green Mountain 
12 
Total 
46 
38 

84 
A distinct varietal difference is shown here. In neither experiment 
did the Spaulding Xo. 4 variety show injury. The American Giant 
was also less susceptible than the rest of the varieties. The Irish 
Cobbler, Rural New Yorker, and Russet Rural showed the greatest 
percentage of injury. In these experiments the potatoes did not 
receive the amount of jolting or rough handling that they might be 
