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CONTENTS, RIX 
° PAGE 
Formation of Wood 794 
c. The Medullary Rays 795 
d. The Bark ‘ 795 
B. Development of the Stem 795 
3. Of the Leaves or Phyllomes 796 
1. Exhalation of Watery Vapour by Leaves 796 
2. Absorption of Fluids by Leaves 799 
3. Absorption and Exhalation of Gases by Leaves 799 
4. Formation of Organic Compounds by Leaves 804 
5. Effects of Gases generally upon Leaves 805 
Wardian Cases . ‘ 806 
6. Colour of Leaves 807 
7. Defoliation, or the Fall of the Leaf 810 
8. Development of Leaves 811 
CHAPTER 2. 
GENERAL PuysroLoay, oR LIFE oF THE WHOLE PLANT 812 
Section 1. 
FOOD OF PLANTS AND ITS SOURCES 813 
. The Organic or Volatile Constituents, and their Sources . Sit 
. The Inorganic Constituents or Ash, and their Sources . 816 
Rotation of Crops 817 
SECTION 2. 
LIFE OF THE WHOLE PLANT, OR THE PLANT IN ACTION 818 
. Absorption 5 818 
. Distribution of Fluid Matters ‘through the Plant, ‘and their 
Alteration in the Leaves : 4 819 
A. Ascent of the Sap . 820 
B. Changes of the Crude Sap i in the Leaves 822 
C. Descent of the Sap . j 825 
CHAPTER 3. 
PHYSIOLOGY OF THE ORGANS OF REPRODUCTION . 826 
Functions of Bracts and Floral Envelopes 896 
Colour of Flowers ; 828 
Development of the Floral Env elopes : R28 
. Functions of the Essential Organs of Reproduction 829 
Sexuality of Plants. : ; 829 
1. Reproduction of the Cryptogamia 829 
A. Reproduction of Thallophytes 29 
1. Reproduction of Algz 830 
a. Conjugation . , 830 
b. Impregnation of Naked Spores or Gaze 
Corpuscles by Ciliated Antherozoids . 
2. Reproduction of Characex 
