58 THE NATURE-STUDY OF PLANTS 
and Beans, Apples and Cherries, Acorns and Hazel- 
nuts, Poppyheads and Nasturtium fruits; but we shall 
not be able to understand very much about how it 
all comes about without resort to the laboratory and 
the microscope. 
Curiosity, no doubt, will stimulate investigation, 
and the student will soon discover first-hand a very 
great deal more than he could glean second-hand if 
I devoted a chapter or two to the subject. 
I propose, therefore, saying nothing more about 
this factor of life except that, as we shall see in the 
next chapter, the seventh and last is like unto it in 
so far as this, that the debt which the animal world 
owes to the vegetable is, in its satisfaction, reduced to 
the vanishing point. 
