Project Gutenberg 2015-01-02 Public domain in the USA. 79 Weismann, August 1834 1914 Weismann, A. (August) Weismann, Friedrich Leopold August Darwin, Charles 1809 1882 Darwin, Charles Robert Meldola, Raphael 1849 1915 Studien zur Descendenz-Theorie. English Studies in the Theory of Descent (Volumes 1 and 2) Produced by Marilynda Fraser-Cunliffe, Charlie Howard, and the Online Distributed Proofreading Team at http://www.pgdp.net (This file was produced from images generously made available by The Internet Archive) "Studies in the Theory of Descent" by August Weismann is a scientific publication written in the late 19th century. This work delves into the principles of evolution, focusing significantly on the mechanisms of inheritance and variability in species, particularly in insects. It aims to investigate the interactions between environmental factors and biological development, thereby exploring the complexities and implications of evolutionary theory. At the start of this work, Weismann introduces the concept of seasonal dimorphism in butterflies, where different forms of a species appear at different times of the year, as exemplified by the species "Araschnia Levana". He describes experiments that reveal how environmental influences, such as temperature, can affect the development and characteristics of butterflies, offering insights into the origin of their markings. Weismann challenges existing views on adaptation and establishes a basis for further investigation into how species may evolve and adapt over time, highlighting the significance of both inherited traits and external conditions in shaping biological forms. (This is an automatically generated summary.) en Insects Heredity Zoology Butterflies Lepidoptera Insects -- Evolution Mechanism (Philosophy) QH QL Text Browsing: Nature/Gardening/Animals Browsing: Science - General Browsing: Science - Genetics/Biology/Evolution 1425385 1425383 2024-09-20T05:44:31.068980 2023-09-20T15:38:37.764444 text/html text/html 1423459 2015-01-01T20:59:24 text/html; charset=utf-8 1013093 2015-01-01T20:59:26 text/html; charset=utf-8 application/zip 1149883 2024-09-20T05:44:53.997902 application/epub+zip 1155418 2024-09-20T05:44:35.033977 application/epub+zip 573226 2024-09-20T05:44:32.983007 application/epub+zip 1551542 2024-09-20T05:45:05.969839 application/x-mobipocket-ebook 1406948 2024-09-20T05:44:51.219873 application/x-mobipocket-ebook 826827 2022-09-21T17:30:41.604571 application/x-mobipocket-ebook 1177062 2024-09-20T05:44:27.063012 text/plain; charset=us-ascii 1177292 2015-01-01T20:59:20 text/plain; charset=utf-8 390866 2015-01-01T20:59:24 text/plain; charset=utf-8 application/zip 21199 2024-09-20T05:45:06.144861 application/rdf+xml 11360 2024-09-20T05:44:33.228983 image/jpeg 2173 2024-09-20T05:44:33.105974 image/jpeg 1012913 2024-09-20T05:44:31.193012 application/octet-stream application/zip Archives containing the RDF files for *all* our books can be downloaded at https://www.gutenberg.org/wiki/Gutenberg:Feeds#The_Complete_Project_Gutenberg_Catalog de.wikipedia en.wikipedia en.wikipedia