“I am at the head of a college where to declare against it [evolution] would perplex my best students. They would ask me which to give up, science or the Bible.... It is but the evolution of Genesis when each ‘brings forth after its kind.’ Science tells the same story. But what is the limit of the fixedness of the law? I believe that the evolution of new species is a question in science, and not of religion. It should be left to scientific men.”--President MCCOSH. CONTENTS. I. PAGE THE MOVEMENTS AND HABITS OF PLANTS. The Movement of Plants in Relation to their Wants 2 The Power of Movement in Animal and Plant compared 4 Advantages of Cross-Fertilization 6 Potency of the Sexual Elements in Plants 6 Experiments in Crossing 8 The Struggle for Existence among Seeds 9 Practical Application of these Views 9 Marriages of First Cousins 11 Development of the Two Sexes in Plants 12 Why the Sexes have been reseparated 14 Comparative Fertility of Male and Female Plants 15 Effect of Climate on Reproduction 16 Causes of Sterility among Plants 17 An “Ideal Type” or Inevitable Modification 18 Special Adaptations to a Changing Purpose 19 An Illustration 21 As interesting on the Theory of Development as on that of Direct Interposition 22 The Sleep of the Plants 24 Self-Protection during Sleep 25 Influence of Light upon Plants 28 Influence of Gravitation upon Plants 29 The Power of Digestion in Plants 31 Diverse Means by which Plants gain their Subsistence 34 How a Plant preys upon Animals 35 II. THE PART PLAYED BY WORMS IN THE HISTORY OF THIS PLANET. They preserve Valuable Ruins 42 They prepare the Ground for Seed 43 Intelligence of Worms 45 III. THE LAWS OF VARIABILITY WITH RESPECT TO ANIMALS AND PLANTS. Inherited Effect of Changed Habits 48 Effects of the Use and Disuse of Parts 50