Freezing Injury of Seed Corn 
19 
Table 12 (Continued) — Effect of exposure to ranges of freez- 
ing temperature for different periods of time on the ger- 
mination of corn differing in moisture content. All ears 
were protected naturally by the husks (1915) 
Moisture 
range 
Duration 
of 
exposure 
Minimum 
tempera- 
ture 
Mois- 
ture in 
grain 
Germ- 
ination 
Ice observed 
in grain 
Embryos dark 
or light 
Per 
Per 
Per cent 
Hours 
Degrees F. 
cent 
1 cent 
f 2 
27 
43.5 
100 
* 
Light and dark 
2 
20 
44.4 
100 
* 
Light 
6 
23 
42.1 
100 
* 
Light and dark 
6 
7 
42.2 
42 
Ice 
Light and dark 
8 
23 
45.0 
100 
Ice in some kernels 
Light 
40 to 45 
8 
18 
43.0 
100 
Ice in some kernels 
Light and dark 
8 
3 
44.2 
0 
Ice 
Dark 
10 
14 
43.8 
67 
Ice 
Light and dark 
12 
21 
42.1 
100 
Ice in some kernels 
Light 
12 
14 
44.6 
63 
Ice in some kernels 
Light and dark 
15 
25 
44.3 
96 
Ice in some kernels 
Light 
' 2 
23 
37.9 
100 
* 
Light 
4 
5 
35.4 
45 
Ice 
Light and dark 
6 
23 
36.2 
100 
* 
Light 
35 to 40 
6 
16 
38.1 
50 
Ice in some kernels 
Light and dark 
6 
7 
39.9 
50 
Ice 
Light and dark 
10 
23 
36.2 
100 
None 
Light and dark 
12 
21 
39.2 
83 
None 
Light and dark 
12 
1 
37.3 j 
0 
Ice 
Light and dark 
2 
10 
33.0 
92 
* 
Light 
4 
23 
34.1 
100 
* 
Light 
8 
3 
34.7 
47 
Ice 
Light and dark 
30 to 35 
10 
23 
34.5 
100 
None 
Light 
10 
3 
34.6 
8 
Ice 
Light and dark 
12 
1 
32.4 
25 
Ice 
Light and dark 
32 
25 
33.6 
100 
None 
Light 
' 2 
20 
29.4 
100 
* 
Light 
2 
10 
26.6 
100 
* 
Light and dark 
25 to 30 
4 
5 
28.0 
92 
Ice 
Light 
12 
21 
26.4 
100 
None 
Light 
12 
1 
27.8 
42 
Ice 
Light and dark 
2 
20 
24.4 
100 
* 
Light 
20 to 25 
4 
14 
24.3 
100 
None 
Light 
\ 
6 
16 
22.2 
100 
None 
Light 
f 8 
18 
16.4 
100 
None 
Light 
15 to 20 
10 
3 
19.4 
92 
None 
Light and dark 
10 to 15 
4 
5 
13.6 
100 
None 
Light 
*No observations made. 
