Vill CONTENTS. 
PAGE 
velopment of the Theory of Selection—A Letter of Darwin’s.— 
The Contemporaneous Appearance of Darwin’s and Alfred Wallace’s 
Theory of Selection—Darwin’s Study of Domestic Animals and 
Cultivated Plants—Andreas Wagner’s Notions as to the Special 
Creation of Cultivated Organisms for the good of Man.—The Tree 
of Knowledge in Paradise-—Comparison between Wild and Culti- 
vated Organisms.—Darwin’s Study of Domestic Pigeons.—Import- 
ance of Pigeon Breeding—Common Descent of all Races of 
Pigeons... aad 339 nae ace ae ae ee “1. 125 
CHAPTER VII. 
THE THEORY OF SELECTION (DARWINISM). 
Darwinism (Theory of Selection) and Lamarckism (Theory of Descent). 
—The Process of Artificial Breeding.—Selection of the Different 
Individuals for After-breeding.—The Active Causes of Transmuta- 
tion.—Change connected with Food and Transmission by Inheritance 
connected with Propagation.— Mechanical Nature of these Two 
Physiological Functions. — The Process of Natural Breeding : 
Selection in the Struggle for Hxistence.— Malthus’ Theory of 
Population—The Proportion between the Numbers of Potential 
and Actual Individuals of every Species of Organisms.—General 
Struggle for Existence, or Competition to attain the Necessaries of 
Life——tTransforming Force of the Struggle for Hxistence——Com- 
parison of Natural and Artificial Breeding—Selection in the Life of 
Man.—Military and Medical Selection so ee dee rs 3) 
CHAPTER VIII. 
TRANSMISSION BY INHERITANCE AND PROPAGATION. 
Universality of Inheritance and Transmission by Inheritance.—Special 
Evidences of the same.—Human Beings with four, six, or seven 
Fingers and Toes.—Porcupine Men.—Transmission of Diseases, 
especially Diseases of the Mind. — Original Sin. — Hereditary 
Monarchies. — Hereditary Aristocracy.— Hereditary Talents and 
Mental Qualities.—Material Causes of Transmission by Inheritance. 
—Connection between Transmission by Inheritance and Propaga- 
tion. — Spontaneous Generation and Propagation. — Nonsexual or 
Monogonous Propagation.—Propagation by Self-Division—Monera 
and Amceba.—Propagation by the formation of Buds, by the for- 
mation of Germ-Buds, by the formation of Germ-Cells.—Sexnal or 
Amphigonous Propagation—Formation of Hermaphrodites.—Dis- 
tinction of Sexes, or Gonochorism.—Virginal Breeding, or Parthe- 
