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New material added to the American edition of Origin

Summary

A ‘revised and augmented’ American edition of Origin came on the market in July 1860, and was the only authorised edition available in the US until 1873. It incorporated many of the changes Darwin made to the second English edition, but still contained…

Matches: 27 hits

  • … that species undergo modification, and that the existing forms of life have descended by true …
  • … and varieties,—by the almost perfect gradation of the forms in certain groups, and by the analogy of …
  • … conditions, something to the crossing of already existing forms, and much to use and disuse or the …
  • … believed in a law of progressive development; and as all the forms of life thus tended to progress, …
  • … productions at the present day, he maintained that such forms were now spontaneously generated. …
  • … until 1828 that he published his conviction that the same forms have not been perpetuated since the …
  • … first , of an impulse which has been imparted to the forms of life, advancing them, in definite …
  • … of a particular nature, and thus have given rise to new forms. The ‘‘Philosophy of Creation’’ …
  • … will tend to make an indefinite number of specific forms. As far as mere inorganic conditions are …
  • … even the most prolific area is fully stocked with specific forms; at the Cape of Good Hope, which …
  • … the amount of life (I do not mean the number of specific forms) supported on any area must have a …
  • … the process of modification and of giving birth to new forms will be retarded. Fifthly, and this I …
  • … areas, and thus check the inordinate increase of specific forms throughout the world. Hooker has …
  • … are many invaders from different quarters of the world, the endemic Australian species have …
  • … the tendency to an indefinite augmentation of specific forms. Natural Selection acts, as we …
  • … is it that throughout the world a multitude of the lowest forms still exist, and how is it that in …
  • … so strongly, that he was led to suppose that new and simple forms were continually being produced by …
  • … to be highly organized? If it were no advantage, these forms would be left by natural selection …
  • … condition. And geology tells us that some of the lowest forms, as the infusoria and rhizopods, have …
  • … state. But to suppose that most of the many now-existing low forms have not in the least advanced …
  • … In some cases, as we shall hereafter see, lowly-organized forms seem to have been preserved to the …
  • … arising. Finally, I believe that lowly-organised forms now exist in numbers throughout the …
  • … an optic nerve, simply coated with pigment, which sometimes forms a sort of pupil, but is destitute …
  • … the state of Development of ancient compared with living Forms .— We have seen in the Fourth …
  • … that, on the theory of natural selection, the more recent forms will tend to be higher than their …
  • … advantage in the struggle for life over other and preceding forms. If, under a nearly similar …
  • … as by the standard of the specialisation of organs, modern forms ought, on the theory of natural …

Darwin in letters, 1878: Movement and sleep

Summary

In 1878, Darwin devoted most of his attention to the movements of plants. He investigated the growth pattern of roots and shoots, studying the function of specific organs in this process. Working closely with his son Francis, Darwin devised a series of…

Matches: 2 hits

  • … geographical conditions on the fertility of different flower forms in a species of Linum : ‘Mr …
  • … the plant from Colorado, I imagine that it was there endemic … Now if Mr Meehan has mistaken the …
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