I: 



TABLE OF CONTENTS. 



INTRODUCTION 17 



DIVISION I. CHEMICAL COMPOSITION OF THE PLANT. 



CHAP. I. THE VOLATILE PAKT OP PLANTS . 38 



1. Distinctions* and Definitions 28 



2. Elements of the Volatile Part of Plants 31 



Carbon, Hydrogen, Oxygen, Nitrogen, Sulphur, Phosphor 

 us, Ultimate Composition of Organic Matter -1: 



3. Chemical Affinity 



4. Vegetable Organic Compounds or Proximate Elements 



1. Water 



2. Cellulose Group ;V. 



8. Pectose &quot; SI 



4. Vegetable Acids 85 



5. Fats Ml 



6. Albuminoids !H 



Appendix, Chlorophyll, etc 10!) 



CHAP, n. TUE ASH OF PLANTS Ill 



1. Ingredients of the Ash Ill 



Non-metallic Elements 112 



Carbon and its Compounds 113 



Sulphur 114 



Phosphorus&quot; &quot; &quot; 117 



Silicon &quot; &quot; &quot; 11!) 



Metallic Elements 123 



Potassium and its Compounds 19-1 



Sodium &quot; &quot; &quot; 124 



Calcium &quot; &quot; &quot; 125 



Magnesium and its Compounds 126 



Iron 127 



Manganese &quot; &quot; &quot; 128 



Salts 129 



Carbonates 130 



Sulphates 132 



Phosphates 133 



Chlorides 135 



Nitrates 136 



2. Quantity, Distribution, and Variations of the Ash 138 



Table of Proportions of Ash in Vegetable Matter 139 



\ 3. Special Composition of the Ash of Agricultural Plants 147 



1. Constant Ingredients \ 148 



2. Uniform composition of normal special s of given plant.148 

 Table of Ash-analyses 150 



3. Composition of Different parts of Plant 157 



4. Like composition of similar plants 159 



5. Variability of ash of same species ISO 



6. What is normal composition of the ash of a plant ? 103 



7. To what extent is each ash-ingredient essential&quot; or acci 



dental 166 



Water-culture 167 



ntial ash-ingredients 172 



Is Soda Essential to Agricultural Plants ? 172 



Oxide of Iron indispensable 178 



Oxide of Manganese unessential 179 



Is chlorine indispensable ? 180 



Silica is not essential 183 



Ash-ingredients taken up in excess .... 1^7 



Disposition of superfluous matters l!S9 



State of Ash-Ingredient! in plant lit.] 



4. Functions of the Ash-ingredients 1% 



CHAP. III. 1. Quantitative .Relations among the Ingredients of Plants 201 



2. Comno-ition of the plant in KIUT^S: ve stages of growth 203 



Composition and (Jrowth of tin- Oat Plant 2iM 



DIVISION II -TliK ST1U CTUIi: OK THK PLANT AND OFFICES OF 

 ITS OKI JANS. 



CHAP. I. GENERALITIES 22(1 



Organ itm, Organs 88? 



8 



