448 
DEMETRIUS ION ANDRONESCU 
Germination Media 
Concentration 
Length of 
Observations 
Simple 
Mixture 
Stem 
Radicle 
0.5% 
1% 
1.5% 
2% 
3% 
5% 
i%> 
0.02% 
1% 
^ /o 
0.25% 
0.25% 
1% 
0.25% 
mm. 
6 
mm. 
7 
2 
2 
12 
13 
5 
I 
4 
0 
4 
Sucrose 
Vigorous stem. 
Vigorous stem. 
Sucrose 
I 
1.02% 
3 
10 
Diastase 
1.50% 
0 
0 
No germination 
Sucrose 
Agar 
1-25% 
3 
* 4 
Sucrose 
1% 
0.25% 
Gelatin . 
1-25% 
A 
f 
I 
Sucrose 
T 0/ 
Trace 
Nutrient solution 
10 
13 
1% 
0.007% 
Nutrient solution 
1.007% 
5 
5 
Water 
Nutrient solution 
Trace 
12 
II 
Nutrient solution 
0.007% 
2 
2 
Nutrient solution 
0.014% 
9 
5 
Also developed secondary roots 
1918. The embryos with scutella were planted directly in the soil in a 
plot prepared for this purpose. One row of 16 embryos was planted on May 
15, 191 8, for each of the following strains of maize: Yellow Dent, White 
Dent, and V^^hite Flint; and rows of 16 kernels each were also planted for 
each of the same strains. All kernels germinated and the first leaves 
appeared at the surface of the soil in seven days, the embryos requiring 
eight days for the appearance of leaves. The difference became more 
marked during the following week, at the end of which time the plants pro- 
duced from the kernels were almost twice the size of those produced from 
the embryos. 
On June 2, two plants from each row were carefully removed from the 
soil and observations and measurements were made. The results in 
average are given in the following table: 
These figures also confirm the statement made above, that plants 
developed from embryos show the same characteristics as those developed 
from kernels, although being inferior in size. 
After June 3, however, the individual vigor and vitality of the plants 
grown from the embryos began to be asserted, and by the beginning of 
