CONTENTS 



I. The Composition and Purposes of Plants 



1. The plant is composed of living matter .... 



2. The purposes of plants 



3. Great differences among plants 



4. The oaks, maples, elms, ferns, mosses, and pond-scums are 



not all of the same kind among themselves . 



5. A species 



6. Scope of w^ork described 



PAGE 



1 



II. The Material of which Plants are made up 



§ 7. 



§10. 

 §11. 

 §12. 

 §13. 

 §14. 

 §15. 

 § 16. 

 §17. 

 §18. 



The plant is an engine 



Water, charcoal, and ash 



Leaves shrink in drying 



Mineral coatings .... 



Uses of mineral coatings 



Aquatic plants with mineral coatings 



Water cultures, with and without mineral salts 



Ash or mineral salts in the water of streams 



Elements found in plants .... 



Substances serving as food .... 



Compounds in the plant .... 



Tests for the contents of plants . 



III. The Manner in which Different Kinds of Work 



ARE divided among THE MEMBERS OF THE BODY 



§ 19. Kinds of work, or functions of the plant .... 21 

 §20. Organs 22 



