This book was originally published prior to 1923, and represents a reproduction of an important historical work, maintaining the same format as the original work. While some publishers have opted to apply OCR (optical character recognition) technology to the process, we believe this leads to sub-optimal results (frequent typographical errors, strange characters and confusing formatting) and does not adequately preserve the historical character of the original artifact. We believe this work is culturally important in its original archival form. While we strive to adequately clean and digitally enhance the original work, there are occasionally instances where imperfections such as blurred or missing pages, poor pictures or errant marks may have been introduced due to either the quality of the original work or the scanning process itself. Despite these occasional imperfections, we have brought it back into print as part of our ongoing global book preservation commitment, providing customers with access to the best possible historical reprints. We appreciate your understanding of these occasional imperfections, and sincerely hope you enjoy seeing the book in a format as close as possible to that intended by the original publisher.
A key figure in the field of evolutionary biology, William Bateson (1861–1926) revived Mendelian methods of analysis to develop Darwin's theory of evolution, thereby pioneering the study of genetics. In these lectures, published at Yale in 1913, Bateson systematically chronicles the era's conflicting and developing theories on taxonomy, speciation, variation and hybridisation, and includes his own thoughts on continuous and discontinuous variation and its causes. Drawing on the comparative physiology and anatomy of species that he knew from his wide experience, citing detailed examples from across the taxonomic kingdoms, Bateson brings to life this exciting time in biology. Because the theories central to the modern understanding of genetics, heredity and evolution were formed at this time, this work remains valuable and relevant to students of biology and the history of science.
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