FREEZING INJURY TO POTATOES WHEN UNDERCOOLED. 9 
EXPERIMENT NO. 4. 
Duplicate lots of two potatoes of each variety were held at 28° F. 
for 24 hours, after which all of one lot were dropped 1 foot, After 
another 24 hours all were removed. Examination showed no bruis- 
ing; however, most of the potatoes were frozen. The results are 
shown in Table IY. 
Table IV. — Frce.zine injury to potatoes of seven cliff event varieties undercoolecl 
at 28° F. and dropped 1 foot. 
Variety. 
Dropped. 
Check. 
Injured. 
Uninjured. 
Injured. 
Uninjured. 
Triumph 
2 
2 

2 
2 
2 



2 



2 




1 


2 
2 
Spaulding No. 4 
American Giant 
2 
2 
1 
2 
Green Mountain 
2 
Total 
10 4 
1 
13 
EXPERIMENT NO. 5. 
A total of 2-4 potatoes of the Rural New Yorker variety were placed 
at 28° F. After 24 hours 12 were dropped 12 inches. In no case was 
a potato bruised or even the skin broken. In 4 hours both lots were 
removed. Examination showed all of the lot that was dropped to 
be injured by freezing. None of the check lot was injured. 
EXPERIMENT NO. 6. 
This experiment was conducted to ascertain, if possible, the mini- 
mum distance from which an undercooled potato may fall and still 
succumb to freezing injury. Five lots of 12 potatoes of the Rural 
New Yorker variety were held at 28° F. for 18 hours. Then lots 
were dropped 2, 4, and 6 inches, and in one lot each individual was 
struck with a pencil. After seven hours all were removed. Examina- 
tion showed that only the potatoes that were struck with the pencil 
were injured. 
EXPERIMENT NO. 7. 
Lots of three potatoes of each variety were dropped, as in experi- 
ment No. 6, with the exception that each potato was dropped six times 
instead of once. The results are shown in Table Y. Practically the 
same amount of freezing injury was produced in all dropped pota- 
toes without relation to the length of the fall. The injury produced 
was of the blotch type. It may be stated here that the potatoes used 
in this experiment were purposely selected and weighed, so as to have 
both large and small specimens in each lot, thus varying the force of 
