On The Tendency Of Varieties To Depart Indefinitely From The Original Type
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On the Tendency of Varieties to Depart Indefinitely From the Original Type by Alfred Russel Wallace Pdf
This early work by Alfred Russel Wallace was originally published in 1858 and we are now republishing it with a brand new introductory biography. 'On the Tendency of Varieties to Depart Indefinitely From the Original Type' is a short article on variation and evolutionary theory. Alfred Russel Wallace was born on 8th January 1823 in the village of Llanbadoc, in Monmouthshire, Wales. Wallace was inspired by the travelling naturalists of the day and decided to begin his exploration career collecting specimens in the Amazon rainforest. He explored the Rio Negra for four years, making notes on the peoples and languages he encountered as well as the geography, flora, and fauna. While travelling, Wallace refined his thoughts about evolution and in 1858 he outlined his theory of natural selection in an article he sent to Charles Darwin. Wallace made a huge contribution to the natural sciences and he will continue to be remembered as one of the key figures in the development of evolutionary theory.
Bad Times and On the Tendency of Varieties to Depart Indefinitely from the Original Type by Alfred Russel Wallace Pdf
The present Depression of Trade is remarkable, not so much for its intensity or for its extent—in both of which respects it has been equalled or surpassed on previous occasions, but for its persistence during the long period of eleven years. The late Professor Fawcett, in his Free Trade and Protection (p. 151), says: “The industrial depression is generally thought to have commenced in the closing months of 1874;” and during every succeeding year it has continued to be felt with more or less severity, and its remarkable persistence has been commented on by politicians and public writers. Usually a period of depression is quickly followed by one of comparative prosperity. Such a reaction has been again and again predicted in this case; but up to the present time there are no satisfactory indications that the evil days are passing away. It is evident, therefore, that we are suffering in an altogether exceptional manner, that the disease of the social organism is due to causes or combinations of causes which have not been in action on former occasions, and that the remedial agencies which have been effective on former occasions of depression have now failed us. We thus find ourselves confronted with a problem of vital importance to our well-being as a nation. We are called upon to explain why it is that, notwithstanding the exceptional advantages we possess, in an ever-increasing command over the more recondite powers of nature, an ever-increasing use of labour-saving machinery, a body of labourers whose industry and skill are proverbial, and far more complete and perfect communication with the whole world than was possessed by any previous generation—notwithstanding all these favourable conditions, which would seem to render prosperity certain, we yet find trade crippled and labour paralysed, goods of all kinds selling at unremunerative prices, yet the masses too poor to buy, and universal complaints of diminished profits and restricted markets. So long as these questions are not fully and completely answered, so long as a remedy is not found for the widespread and persistent evil which afflicts the mass of our people, our whole system of social economy, even our civilisation itself, must be accounted to be failures. It will undoubtedly be admitted that a system of society under which willing hands cannot find profitable work, and countless shops and warehouses overflowing with every necessary, comfort, and luxury, mock the longing eyes of insufficiently-clad and half-starved millions, is neither a sound nor a safe one. We may therefore expect to find that the problem of trade-depression is fundamentally the same as that of the persistence of widespread poverty and pauperism notwithstanding our rapid and continuous growth in wealth; and if this be so, its solution will assuredly furnish us with some important principles to direct the course of future legislation. The main points of a sound political programme may be one of the important results of a successful investigation into the causes which have brought about the present depression of trade.
Wallace, Darwin, and the Origin of Species by James T. Costa Pdf
Darwin is credited with discovering evolution through natural selection, but Alfred Russel Wallace saw the same process at work in nature and elaborated the same theory. Dispelling misperceptions of Wallace as a secondary figure, James Costa reveals the two naturalists as equals in advancing one of the greatest scientific discoveries of all time.
Includes two essays by Wallace, "On the law which has regulated the introduction of new species" and "On the tendency of varieties to depart indefinitely from the original type."
On the Tendency of Species to Form Varieties; and on the Perpetuation of Varieties and Species by Natural Means of Selection by Charles Darwin - Delphi Classics (Illustrated) by Charles Darwin Pdf
This eBook features the unabridged text of ‘On the Tendency of Species to Form Varieties; and on the Perpetuation of Varieties and Species by Natural Means of Selection by Charles Darwin - Delphi Classics (Illustrated)’ from the bestselling edition of ‘The Complete Works of Charles Darwin’. Having established their name as the leading publisher of classic literature and art, Delphi Classics produce publications that are individually crafted with superior formatting, while introducing many rare texts for the first time in digital print. The Delphi Classics edition of Darwin includes original annotations and illustrations relating to the life and works of the author, as well as individual tables of contents, allowing you to navigate eBooks quickly and easily. eBook features: * The complete unabridged text of ‘On the Tendency of Species to Form Varieties; and on the Perpetuation of Varieties and Species by Natural Means of Selection by Charles Darwin - Delphi Classics (Illustrated)’ * Beautifully illustrated with images related to Darwin’s works * Individual contents table, allowing easy navigation around the eBook * Excellent formatting of the textPlease visit www.delphiclassics.com to learn more about our wide range of titles
Contributions to the Theory of Natural Selection by Alfred Russel Wallace Pdf
Alfred Russel Wallace is best known as the co-originator of the theory of evolution by natural selection, an honor he shares with his contemporary Charles Darwin. Among the ten essays in this volume is his seminal paper on natural selection, "On the Tendency of Varieties to Depart Indefinitely from the Original Type," which was presented with Darwin's "On the Origin of Species" at a meeting of the Linnean Society of London in July 1858. This edition of Wallace's "Contributions to the Theory of Natural Selection" is the first entry in the Foundations of Biological Thought series published by Briar Bird Press. The series presents the pivotal works of 19th century naturalists remastered for modern readers. Meticulously edited, these volumes preserve the author's intent in design and content, including the manuscript's original annotations and amendments. In addition, revised page references and editor's notes are included throughout to retain the utility of the works for both study and reference.
On the Law Which Has Regulated the Introduction of New Species by Alfred Russel Wallace Pdf
This early work by Alfred Russel Wallace was originally published in 1855 and we are now republishing it with a brand new introductory biography. 'On the Law Which Has Regulated the Introduction of New Species' is an article that details Wallace's ideas on the natural arrangement of species and their successive creation. Alfred Russel Wallace was born on 8th January 1823 in the village of Llanbadoc, in Monmouthshire, Wales. Wallace was inspired by the travelling naturalists of the day and decided to begin his exploration career collecting specimens in the Amazon rainforest. He explored the Rio Negra for four years, making notes on the peoples and languages he encountered as well as the geography, flora, and fauna. While travelling, Wallace refined his thoughts about evolution and in 1858 he outlined his theory of natural selection in an article he sent to Charles Darwin. Wallace made a huge contribution to the natural sciences and he will continue to be remembered as one of the key figures in the development of evolutionary theory.
Includes two essays by Wallace, "On the law which has regulated the introduction of new species" and "On the tendency of varieties to depart indefinitely from the original type."
Natural Selection and Tropical Nature Essays on Descriptive and Theoretical Biology by Alfred Russel Wallace Pdf
This early work by Alfred Russel Wallace was originally published in 1895 and we are now republishing it with a brand new introductory biography. 'Natural Selection and Tropical Nature Essays on Descriptive and Theoretical Biology' is a collection of essays that detail Wallace's observations of various bird species and outlines some of his ideas relating to evolutionary theory. Alfred Russel Wallace was born on 8th January 1823 in the village of Llanbadoc, in Monmouthshire, Wales. Wallace was inspired by the travelling naturalists of the day and decided to begin his exploration career collecting specimens in the Amazon rainforest. He explored the Rio Negra for four years, making notes on the peoples and languages he encountered as well as the geography, flora, and fauna. While travelling, Wallace refined his thoughts about evolution and in 1858 he outlined his theory of natural selection in an article he sent to Charles Darwin. Wallace made a huge contribution to the natural sciences and he will continue to be remembered as one of the key figures in the development of evolutionary theory.
In the Light of Evolution by National Academy of Sciences Pdf
In December 2006, the National Academy of Sciences sponsored a colloquium (featured as part of the Arthur M. Sackler Colloquia series) on "Adaptation and Complex Design" to synthesize recent empirical findings and conceptual approaches toward understanding the evolutionary origins and maintenance of complex adaptations. Darwin's elucidation of natural selection as a creative natural force was a monumental achievement in the history of science, but a century and a half later some religious believers still contend that biotic complexity registers conscious supernatural design. In this book, modern scientific perspectives are presented on the evolutionary origin and maintenance of complex phenotypes including various behaviors, anatomies, and physiologies. After an introduction by the editors and an opening historical and conceptual essay by Francisco Ayala, this book includes 14 papers presented by distinguished evolutionists at the colloquium. The papers are organized into sections covering epistemological approaches to the study of biocomplexity, a hierarchy of topics on biological complexity ranging from ontogeny to symbiosis, and case studies explaining how complex phenotypes are being dissected in terms of genetics and development.
Author : Keith A. Francis Publisher : Bloomsbury Publishing USA Page : 233 pages File Size : 53,6 Mb Release : 2006-12-30 Category : History ISBN : 9781573567947
Charles Darwin and The Origin of Species by Keith A. Francis Pdf
In 1859, an amateur British naturalist published a book of findings that shook the scientific community to its core and changed the structure of religion and science as we know them. The product of over 20 years of research, The Origin of Species challenged the popular belief that species could not evolve and argued that species can adapt to their environment and develop accordingly. Although other scientists had observed some of the phenomena that Charles Darwin addressed, he was the first to theorize that natural selection, and later, evolution, were viable explanations for the origins of life. The implications of Darwin's findings still reverberate today, in the classroom, in the courtroom, and at the highest legislative levels. Lively thematic chapters explore how Darwin came to the conclusions published in The Origin of Species—and in later works such as The Descent of Man—from his early years at Cambridge, to his observations of species on the HMS Beagle voyages, through the 20 years of research that culminated in Origin. Also included is an insightful discussion of Darwin's impact as it is felt today, from movies and popular culture to the current Intelligent Design controversy. Biographies of influential figures, primary source letters and selections from Origin, a glossary of terms, and an extensive annotated bibliography round out this accessible work.
