CONTENTS 



CHAPTER I 

 STIMULUS AND RESPONSE 



PAGE 



1. Fundamental Relations 1 



2. The Nature of Stimuli 1 



3. The Kinds of Stimuli 3 



4. The Nature of Response 3 



5. Adjustment and Adaptation 4 



6. Kinds of Adjustment 5 



7. Normal and Abnormal Adjustment 5 



CHAPTER II 

 THE WATER OF THE HABITAT 



8. Relation of the Plant to Water 7 



9. The Nature of Water Stimuli 7 



10. Water Content 8 



11. Influence of other Factors upon Water Content 9 



12. Available and Non-available Water Content 9 



13. Soil Samples 10 



14. Computation of Water Content 11 



15. Time of Water Content Readings 12 



16. Location of Readings 12 



17. Depth of Samples 12 



Experiment 1. Measurement of Water Content 13 



18. The Determination of Available Water 13 



19. Chresard of Habitats 14 



Experiment 2. Determination of Available Water 14 



Modifying Factors 



20. Influence of Soil upon Water Content lo 



21. Origin and Structure Ifi 



22. Water Capacity 17 



V 



