BY THE SAME AUTHOR. ON THE ORIGIN OF SPECIES BY MEANS OF NATURAL SELECTION; or, THE PRESERVATION OF FAVORED RACES in the Struggle FOR LIFE. New and revised edition. 12mo. Cloth. 480 pages. Price, $2.co. THE DESCENT OF MAN, AND SELECTION IN RELATION TO SEX. With Illustrations. New edition, revised and augmented. 12mo. Cloth. 704 pages. Price, $3.00. A NATURALIST'S VOYAGE ROUND THE WORLD; or, A JOURNAL OF Researches intO THE NATURAL HISTORY AND Geology of THE COUNTRIES visited during the Voyage of H. M. S. Beagle, under the command of Captain FitzRoy, R. N. 12mo. Cloth. 530 pages. Price, $2.00. THE EXPRESSION OF THE EMOTIONS IN MAN AND ANIMALS. With Photographic and other Illustrations. 12mo. Cloth. Price, $3.00. INSECTIVOROUS PLANTS. With Illustrations. I vol., 12mo. Cloth. Price, $2.00 THE MOVEMENTS AND HABITS OF CLIMBING PLANTS. With Illustrations. I vol., 12mo. Cloth. Price, $1.25. THE VARIATION OF ANIMALS AND PLANTS UNDER DOMESTICATION. Second edition, revised. With Illustrations. 2 vols., 12mo. Cloth. Price, $5.00. THE EFFECTS OF CROSS AND SELF FERTILISATION IN THE VEGETABLE KINGDOM. 1 vol., 12mo. Cloth. Price, $2.00. ON THE FERTILISATION OF ORCHIDS BY etc., etc. I vol., 12mo. Cloth. Price, $1.75 INSECTS, THE THEORY OF DESCENT AND DARWINISM. By Prof. OSCAR SCHMIDT, University of Strasburg. 12mo. Cloth. Price, $1.50. DARWINIANA: ESSAYS AND REVIEWS PERTAINING TO DARWINISM. By Prof. ASA GRAY. I vol., 12mo. Cloth. Price, $2.00. PRESERVATION OF FAVORED RACES IN THE STRUGGLE BY CHARLES DARWIN, M. A., F. R. S., AUTHOR OF "JOURNAL OF RESEARCHES DURING H. M. S. BEAGLE'S VOyage round NEW EDITION, FROM THE SIXTH ENGLISH EDITION, WITH ADDITIONS NEW YORK: D. APPLETON AND COMPANY, 1878. COLLEGE "But with regard to the material world, we can at least go so far as this-we can perceive that events are brought about not by insulated interpositions of Divine power, exerted in each particular case, but by the establishment of general laws." WHEWELL: Bridgewater Treatise. "The only distinct meaning of the word 'natural' is stated, fixed, or settled; since what is natural as much requires and presupposes an intelligent agent to render it so, i. e., to effect it continually or at stated times, as what is supernatural or miraculous does to effect it for once." BUTLER: Analogy of Revealed Religior. "To conclude, therefore, let no man out of a weak conceit of sobriety, or an ill-applied moderation, think or maintain, that a man can search too far or be too well studied in the book of God's word, or in the book of God's works; divinity or philosophy; but rather let men endeavour an endless progress or proficience in both." BACON: Advancement of Learning. Down, Beckenham, Kent, First Edition, November 24th, 1859. Sixth Edition, Jan. 1872. VARIATION UNDER DOMESTICATION. Causes of Variability-Effects of Habit and the use or disuse of Parts - Correlated Variation - Inheritance-Character of Domestic Varieties — Difficulty of distinguishing between Varieties and Species — Origin of Domestic Varieties from one or more Species- Domestic Pigeons, their Differences and Origin-Principles of Selection, anciently fol- lowed, their Effects - Methodical and Unconscious Selection - Un- known Origin of our Domestic Productions Circumstances favour- genera in each country vary more frequently than the species of the smaller genera-Many of the species of the larger genera resemble varieties in being very closely, but unequally, related to each other, is bearing on natural selection-The term used in a wide sense-Geome- trical ratio of increase- Rapid increase of naturalised animals and plants Nature of the checks to increase - Competition universal— Effects of climate - Protection from the number of individuals - Complex relations of all animals and plants throughout nature- Struggle for life most severe between individuals and varieties of the same species: often severe between species of the same genus-Tho relation of organism to organism the most important of all rela |