Table of Contents 



V. Experiments 136 



e. The Fifth Step 136 



SOME SIMPLE EXPERIMENTS 136 



I. On Solutions 136 



II. On the Reaction of Starch 136 



III. On Diffusion 136 



IV. On Evaporation 137 



V. On the Effects of Heat 137 



VI. On Absorption 138 



VII. On the Effects of Surface Exposure 138 



VIII. On the Rise of Liquids 1 39 



IX. On Transpiration 140 



X. On How Transpiration is Regulated 140 



XI. On the Parts of Stems that Convey Sap 141 



XII. On Respiration 141 



XIII. On Germination 142 



XIV. On Tropisms, Direction of Growth 142 



XV. On the Influence of Environment 143 



/. VI. Recitation 143 



f. VII. Lecture 143 



. VIII. Drawing 145 



i. IX. Writing 148 



/. X. Reading 149 



CHAPTER V 



EXAMPLES OF PUPILS* WORK IN NATURE STUDY. 



Section XIV. THE APPLE-TREE 150 



Section XV. THE GRASSHOPPER 156 



Section XVI. THE SAGE-BRUSH GALLS AND THEIR INHABI- 

 TANTS 1 68 



Section XVII. BIOLOGY OF THE PARAMECIUM . . . . . 175 



PART II 



LIFE: ITS FORMS AND ITS MANIFESTA- 

 TIONS 



CHAPTER I 



LIFE OF PLANTS AND ANIMALS 



Section I. INTRODUCTORY 187 



Section II. MICROSCOPIC ORGANISMS 187 



1. Algi 187 



2. Fungi 188 



3. Lichens 189 



4. Bacteria 190 



