Category: Science - Biology
As regards Heredity, I have restricted the discussion almost exclusively to Professor Weismann's views, partly because he is at present by far the most important writer upon this subject, and partly because his views with regard to it raise with most distinctness the issue whi...
As regards Heredity, I have restricted the discussion almost exclusively to Professor Weismann's views, partly because he is at present by far the most important writer upon thi...
2. Chapter IV was type-written; in it, too, no alterations of any moment3. Chapter V on the basis of these notes, extending it in such ways asseemed to be desirable. In that case it would have been revised and amended by the author and received his final sanction. Death annulled this friendly compact; and since, had I...
4. CHAPTER I.5. CHAPTER III.6. CHAPTER IV.7. CHAPTER V.8. CHAPTER VIII.9. CHAPTER X.10. CHAPTER I.It is desirable to open this volume of the treatise on _Darwin and after Darwin_ by taking a brief survey of the general theory of descent, first, as this was held by Darwin him...
11. CHAPTER II.We will proceed to consider, throughout Section I of the present work, the most important among those sundry questions which have come to the front since the death of Darwin. Fo...
12. CHAPTER III.Starting with the evidence in favour of the so-called Lamarckian factors, we have to begin with the Indirect--and this without any special reference to the theories, either of W...
13. CHAPTER IV.Notwithstanding the fact already noticed, that no experiments have hitherto been published with reference to the question of the transmission of acquired characters[63], there a...
14. CHAPTER V.The strongest argument in favour of "continuity" is that based upon the immense difference between congenital and acquired characters in respect of heritability. For that there...
15. CHAPTER VI.In the foregoing chapters I have endeavoured to be, before all things, impartial; and if it seems that I have been arguing chiefly in favour of the Lamarckian principles, this h...
16. CHAPTER VII.One of the great changes which has been wrought in biological science by the Darwinian theory of natural selection, consists in its having furnished an intelligible explanation...
17. CHAPTER VIII.Let us now proceed to indicate some of the causes, other than natural selection, which may be regarded as adequate to induce such changes in organic types as are taken by system...
18. CHAPTER IX.It must have appeared strange that hitherto I should have failed to distinguish between "true species" and merely "climatic varieties." But it will conduce to clearness of discu...
19. CHAPTER X.Our subject is not yet exhausted. For it remains to observe the consequences which arise from the dogma of utility as the only _raison d'etre_ of species, or of specific charact...
20. Chapter X, this paper proceeds, with the exception of a few verbal"There is, however, one respect in which Professor Weismann's statement of the principle of panmixia differs from that which was considered by Mr. Darwin; and it is this differe...
21. Part III. Post-Darwinian Questions. Isolation and PhysiologicalAnts and Some Other Insects. An Inquiry into the Psychic Powers of these Animals, with an Appendix on the peculiarities of their Olfactory Sense. By August Forel. Translated by...