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There is a great deal more that might be said on this 
subject. What a plant lives on, what it eats and drinks 
and breathes, is very interesting to learn about. And 
of course the food taken in by the roots must be carried 
upward through the stem. But to write simply about 
this is difficult. As much as I think most of you can 
understand, I will tell you when we take up leaves. 
