Excerpt from The Mutation Theory, Vol. 1: Experiments and Observations on the Origin of Species in the Vegetable Kingdom The promulgation of the principle of unit-characters is the main theme of this work, as is emphasized in the first sentence of the Introduction. At the time of the publication of the first part of the German edition (1900) this principle was new and was also in evident opposition to the current belief in the slow and gradual evolution of the organic world. During the years that have since elapsed, it has gained almost universal acceptance, though there are still some authors, especially among zoologists, who are opposed to it. The evidence which supported this view was derived from three main sources. First a clearer understanding of the processes of selection in agricultural plant-breeding. This conception has since been corroborated in the most convincing manner by the work of Nilsson and of Korschinsky and it points to the elementary species as the real material for artificial and natural selection. Secondly, the experimental evidence afforded by the evening primroses and some other groups of plants; especially the observed origin of Oenothera gigas, which appeared suddenly in my cultures in the year 1895 and possessed, at its first origin, all the attributes of a new species, including constancy and even a double number of chromosomes in its nuclei. 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
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Excerpt from The Mutation Theory, Vol. 1: Experiments and Observations on the Origin of Species in the Vegetable Kingdom
German edition. Some chapters, especially among those on hybridization, which seem to be of too technical a nature for the general student will be omitted from the second volume. It is proposed to publish their translation in a separate work. Amsterdam, June 1908. Hugo DE vries.
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.
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Paperback. Condition: New. Print on Demand. This book challenges the long-held belief that species evolve gradually over time. The author, a prominent botanist, argues that species arise not through slow, incremental changes, but through sudden, distinct leaps known as "mutations." This idea, the "Mutation theory," stands in direct contrast to Darwin's theory of natural selection, which holds that species evolve through the gradual accumulation of small variations. The author carefully examines the evidence supporting Darwin's theory, finding it lacking in experimental support. He questions the reliance on breeders' observations, arguing that their practices are not designed for scientific inquiry and often fail to record the true origins of new varieties. He then presents his own experimental evidence, focusing on the evening primrose, *Oenothera Lamarckiana,* which he meticulously studied for years. He details a series of mutations that occurred in his cultures, demonstrating how new species can arise abruptly and remain stable. The book explores the nature of variability in plants, drawing a clear distinction between individual variation, which is continuous and influenced by the environment, and mutability, which involves sudden and distinct changes in the hereditary makeup of an organism. The author argues that only mutability can lead to the origin of new species. By examining the origin of new species through mutation, the author proposes a revolutionary approach to understanding the development of life on Earth. His work offers a new lens through which to view the processes of evolution and provides valuable insights into the nature of variation and the mechanisms of speciation. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item. Seller Inventory # 9781330703816_0
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