LUTHER BURBANK 
If the fruit grower could gain such information 
as this in advance, thus planting only the hardier 
individuals and subsequently making selection of 
the best among these, he might obviously hope to 
advance with greater rapidity. And as the task 
at best is a tedious one, the plant developer should 
welcome any aid that may be offered, from 
whatever source. 
As yet, however, we have no assurance that 
definite assistance can be given us by the micro- 
scopists. It may be that the physical conditions 
that determine hardiness or sensitiveness in the 
flower are dependent on molecular arrangements 
that lie far beyond the limits of microscopic 
vision. 
In that case, we shall be obliged to depend 
upon the old method of selection, picking out 
plants that have proved somewhat hardier than 
their fellows, and being on the alert at all stages 
to discover the correlations as to color or form of 
stem or leaf that are associated with hardiness of 
blossom, that these may aid us in making early 
selection among our seedlings. 
SEEKING Alp FROM THE PLUM 
I have said that the plant experimenter who 
attempts to give us a race of apricots with blos- 
soms resistant to cold can perhaps expect little aid 
from crossing the existing varieties of apricot. 
[25.4] 
