Studies in the Theory of Descent (Volumes 1 and 2)
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Studies in the Theory of Descent (Volumes 1 and 2)

By August Weismann
Free
Book Description
Table of Contents
  • STUDIES IN THE THEORY OF DESCENT.
  • PREFATORY NOTICE.
  • TRANSLATOR’S PREFACE.
  • PREFACE TO THE ENGLISH EDITION.
  • CONTENTS.
  • STUDIES IN THE THEORY OF DESCENT.
  • Part I. ON THE SEASONAL DIMORPHISM OF BUTTERFLIES.
    • I. The Origin and Significance of Seasonal Dimorphism.
      • II. Seasonal Dimorphism and Climatic Variation.
      • III. Nature of the Causes producing Climatic Varieties.
      • IV. Why all Polygoneutic Species are not Seasonally Dimorphic.
      • V. On Alternation of Generations.
      • VI. General Conclusions.
      • APPENDIX I. EXPERIMENTS.
      • APPENDIX II.
      • EXPLANATION OF THE PLATES.
    • II. Seasonal Dimorphism and Climatic Variation.
    • III. Nature of the Causes producing Climatic Varieties.
    • IV. Why all Polygoneutic Species are not Seasonally Dimorphic.
    • V. On Alternation of Generations.
    • VI. General Conclusions.
    • APPENDIX I. EXPERIMENTS.
    • APPENDIX II.
    • EXPLANATION OF THE PLATES.
  • STUDIES IN THE THEORY OF DESCENT.
  • Part II. ON THE FINAL CAUSES OF TRANSFORMATION.
    • I. THE ORIGIN OF THE MARKINGS OF CATERPILLARS.
      • INTRODUCTION.
      • I. Ontogeny and Morphology of Sphinx-Markings.
      • II. Conclusions from Phylogeny.
      • III. Biological Value of Marking in General.
      • IV. Biological Value of Colour.
      • V. Biological Value of Special Markings.
      • VI. Objections to a Phyletic Vital Force.
      • VII. Phyletic Development of the Markings of the Sphingidæ: Summary and Conclusion.
    • INTRODUCTION.
    • I. Ontogeny and Morphology of Sphinx-Markings.
    • II. Conclusions from Phylogeny.
    • III. Biological Value of Marking in General.
    • IV. Biological Value of Colour.
    • V. Biological Value of Special Markings.
    • VI. Objections to a Phyletic Vital Force.
    • VII. Phyletic Development of the Markings of the Sphingidæ: Summary and Conclusion.
    • II. ON PHYLETIC PARALLELISM IN METAMORPHIC SPECIES.
      • INTRODUCTION.
    • INTRODUCTION.
  • STUDIES IN THE THEORY OF DESCENT
    • I. Larva and Imago vary in Structure independently of each other.
      • II. Does the Form-relationship of the Larva coincide with that of the Imago?
      • III. Incongruences in other Orders of Insects.
      • IV. Summary and Conclusion.
      • APPENDIX I.
      • APPENDIX II.
      • EXPLANATION OF THE PLATES.
    • II. Does the Form-relationship of the Larva coincide with that of the Imago?
    • III. Incongruences in other Orders of Insects.
    • IV. Summary and Conclusion.
    • APPENDIX I.
    • APPENDIX II.
    • EXPLANATION OF THE PLATES.
  • STUDIES IN THE THEORY OF DESCENT.
  • Part III. ON THE FINAL CAUSES OF TRANSFORMATION.
    • III. THE TRANSFORMATION OF THE MEXICAN AXOLOTL INTO AMBLYSTOMA.
      • INTRODUCTION.
      • EXPERIMENTS.
      • Postscript.
      • Addendum.
    • INTRODUCTION.
    • EXPERIMENTS.
    • Postscript.
    • Addendum.
    • IV. ON THE MECHANICAL CONCEPTION OF NATURE.
      • INTRODUCTION.
      • I. Are the Principles of the Selection Theory Mechanical?
      • II. Mechanism and Teleology.
    • INTRODUCTION.
    • I. Are the Principles of the Selection Theory Mechanical?
    • II. Mechanism and Teleology.
  • FOOTNOTES
  • INDEX.
  • ERRATA.
  • Transcriber’s Notes
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