elass to which any one variety of apples be¬ 
longs varies in different localities. Not only 
do the environmental conditions represented 
by climate and soil determine the class to 
which any variety of apples belongs, but 
they even determinte the quantity of pollen 
produced. Hence it becomes of especial sci¬ 
entific interest to us when we consider that 
these environmental factors influence the 
characteristics and behavior of the germ-cell 
of the plant. By writing to your State ex¬ 
periment station you can usually obtain a 
list of the apples which pollinate well to¬ 
gether, and of those that blossom at the 
same time. Such a list becomes very val¬ 
uable for reference at the time of planting 
an orchard. 
Let us consider the changes in the fer¬ 
tilized flower after the petals have fallen 
and their relation to orchard spraying. By 
examining plates Nos. II and III it will be 
seen that the changes that are evident in 
