Project Gutenberg 2010-10-15 Public domain in the USA. 174 Weismann, August 1834 1914 Weismann, A. (August) Weismann, Friedrich Leopold August McCormack, Thomas J. (Thomas Joseph) 1865 1932 McCormack, Thomas Joseph McCormack, Thomas On Germinal Selection as a Source of Definite Variation Produced by Bryan Ness, Keith Edkins and the Online Distributed Proofreading Team at https://www.pgdp.net (This file was produced from images generously made available by The Internet Archive/American Libraries.) "On Germinal Selection as a Source of Definite Variation" by August Weismann is a scientific publication written in the late 19th century. The work discusses the theory of germinal selection as a mechanism of evolution, aiming to clarify and expand upon the principles of natural selection originally proposed by Darwin and Wallace. Weismann seeks to argue that variation and adaptation arise not purely from random chance but through underlying processes connected to the germinal elements of organisms, which can direct the course of evolution. The opening of this work presents the author's preliminary arguments and the context for his theory. Weismann introduces the concept of germinal selection, which posits an internal mechanism that influences the direction of variation in response to external environmental pressures. He discusses the criticisms of conventional selection theories and emphasizes the importance of exploring deeper biological mechanisms, arguing that understanding the role of germs and determinants is essential for explaining how useful variations arise and how organisms adapt to their environments over generations. The preface sets the stage for a detailed analysis of heredity, variation, and selection, showcasing Weismann's ambition to enhance the discourse on evolutionary biology. (This is an automatically generated summary.) Reading ease score: 42.1 (College-level). Difficult to read. en Variation (Biology) QH Text Category: Science - Biology 225296 2025-08-14T04:48:14.861165 text/html 215613 2021-01-07T02:38:30 text/html 165648 2025-08-14T04:48:24.253107 application/epub+zip 165449 2025-08-14T04:48:19.851102 application/epub+zip 133240 2025-08-14T04:48:17.988110 application/epub+zip 388863 2025-08-14T04:48:26.982083 application/x-mobipocket-ebook 372564 2025-08-14T04:48:22.885096 application/x-mobipocket-ebook 315399 2022-09-15T13:28:17.094687 application/x-mobipocket-ebook 175554 2025-08-14T04:48:14.179163 text/plain; charset=us-ascii 175322 2021-01-07T02:38:30 text/plain; charset=us-ascii 175366 2021-01-07T02:38:30 text/plain; charset=us-ascii 20906 2025-08-14T04:48:27.129075 application/rdf+xml 21345 2025-08-14T04:48:18.534110 image/jpeg 4488 2025-08-14T04:48:18.263146 image/jpeg 63500 2021-01-07T02:38:30 application/octet-stream application/zip 70069 2021-01-07T02:38:30 application/octet-stream application/zip 63435 2021-01-07T02:38:30 application/octet-stream application/zip 161802 2025-08-14T04:48:14.879130 application/octet-stream application/zip Archives containing the RDF files for *all* our books can be downloaded at https://book.klll.cc/wiki/Gutenberg:Feeds#The_Complete_Project_Gutenberg_Catalog en.wikipedia de.wikipedia