Freezing Injury of Seed Corn 
15 
For this test, grain harvested at the first six different 
stages of maturity in 1917 and described in Table 2 was used. 
The grain was soaked for a short time in water in order to 
facilitate an accurate separation of the embryo from the rest 
of the kernel. The relative moisture-free weights of 100 repre- 
sentative kernels and their embryos were determined for eich 
stage of maturity. The moisture-free weights of 100 seeds for 
each stage were respectively 8.28, 13.45^ 17.54, 21.17, 25.10, and 
28.04 grams, while the moisture-free weights of the embryos 
were respectively 0.65, 1.41, 1.94, 2.18, 2.67, and 3.12 grams. 
The respective ratios of weight of embryos to total weight of 
Fig. 9 — Representative kernels of Hogue’s Yellow Dent corn harvested at 
various stages of maturity in 1917. Top row shows the condition 20 
days after fertilization of ovule; second row from top, 27 days; third 
row from top, 34 days; fourth row from top, 41 days; fifth row from 
top, 48 days; bottom row, 55 days. See Table 2 
