PART I.

THE LIFE OF THE PLANT

CHAP. PAGE I. Introductory 1 II. Signs of Life 4 III. Seeds and Seedlings 8 IV. Food Materials of the Older Plant--1. In the Soil 14 V. Food Materials of the Older Plant--2. In the Air 18 VI. The Food Manufactured by the Plant 23 VII. The Circulation of Water 28 VIII. Light and its Influences 35 IX. Growth in Seedlings 40 X. Movement 45 Summary of Part I. 49