Excerpt from Darwin Memorial Celebration A demonstration of the results of the normal rapid rate of multi plication under the supposition that no elimination takes place results which could not be produced in nature. The Water Hyacinth, a plant which has been introduced into Florida, a new habitat, where it has multiplied at such a rate as to choke the streams. A map showing the area of distribution of the English Sparrow in the year 1886, twenty-two years after its introduction into North America. A map showing the spread of the potato-bug, during successive decades. A demonstration of the struggle for existence of young plants grown from seeds planted in areas that overlap. Photographs of the conditions in forests, where low-shrubbery is prevented from growing because of the lack of light in the shade of the large trees. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.