A New Theory of the Origin of SpeciesFowler & Wells, 1883 - Всего страниц: 272 |
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Стр. 18
... adaptation to changed conditions ; and such changes have never yet been known as effecting an undoubted change of species . So obvious was the inadequacy of this theory to produce such momentous results , that the French philosopher ...
... adaptation to changed conditions ; and such changes have never yet been known as effecting an undoubted change of species . So obvious was the inadequacy of this theory to produce such momentous results , that the French philosopher ...
Стр. 20
... the forms of life , advancing them in definite times by generation . " 2nd , of another ment , answering to the " adaptation of the natural modifying impulse growing out of the environ- 20 A New Theory of the Origin of Species .
... the forms of life , advancing them in definite times by generation . " 2nd , of another ment , answering to the " adaptation of the natural modifying impulse growing out of the environ- 20 A New Theory of the Origin of Species .
Стр. 21
Benjamin G. Ferris. ment , answering to the " adaptation of the natural theologian . " ( 13-138 ) . Under these and similar considerations , he re- states as not " a very immoderate hypothesis that a chemico - electrie operation by which ...
Benjamin G. Ferris. ment , answering to the " adaptation of the natural theologian . " ( 13-138 ) . Under these and similar considerations , he re- states as not " a very immoderate hypothesis that a chemico - electrie operation by which ...
Стр. 27
... adapted to the condition of life of its own region , and has supplanted and exterminated its original parent and all the transitional varieties between its past and present states . " ( 2-156 ) . As one of his numerous illustrations of ...
... adapted to the condition of life of its own region , and has supplanted and exterminated its original parent and all the transitional varieties between its past and present states . " ( 2-156 ) . As one of his numerous illustrations of ...
Стр. 33
... adaptation ; and in both cases varieties are produced . But no instance has ever yet been known where anything like a radical change of species has occured either by domes- tication or natural selection : Nor can such change ever occur ...
... adaptation ; and in both cases varieties are produced . But no instance has ever yet been known where anything like a radical change of species has occured either by domes- tication or natural selection : Nor can such change ever occur ...
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According adaptation advance animals appear Archegosaurus Averroes birds birth body brain capacity Carboniferous Caucasian race causes cells cents changes Chimpanzee civilized color conclusion connection created creation creative Creator Darwin definite Deity descent developed distinct earth embryo ence Eocene evidence evolution existence fact feet female fishes force forms germ Gorilla gradually Haeckel hair higher horse human Huxley hypothesis idea Illustrated improvement inference instance instinct intelligence kind language large numbers living lower lowest male mammals manifested marsupial matter ment mental Mesozoic mind Miocene modern Molluscs moner monkey natural selection offspring organic origin of species ovum peculiar period phenomena Phrenology physical plants Plesiosaurus Plio Pliocene polygamy primitive principle produced Prof progenitor Protozoa question races reason regarded relation remains reptile resemble result savage says sexes sexual selection Silurian skull Spencer stone age structure supposed teleology theory tion tribes true universe vertebrate
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Стр. 27 - ... and which I formerly entertained, namely, that each species has been independently created, is erroneous. I am fully convinced that species are not immutable; but that those belonging to what are called the same genera are lineal descendants of some other and generally extinct species, in the same manner as the acknowledged varieties of any one species are the descendants of that species. Furthermore, I am convinced that Natural Selection has been the main, but not exclusive, means of modification.
Стр. 215 - The Principles of Physiology, applied to the Preservation of Health, and to the Improvement of Physical and Mental Education.
Стр. 206 - There can be no doubt that the difference between the mind of the lowest man and that of the highest animal is immense. An anthropomorphous ape, if he could take a dispassionate view of his own case, would admit that though he could form an artful plan to plunder a garden — though he could use stones for fighting or for breaking open nuts, yet that the thought of fashioning a stone into a tool was quite beyond his scope. Still less, as he would admit, could he follow out a train of metaphysical...
Стр. 209 - It is generally acknowledged that all organic beings have been formed on two great laws — Unity of Type, and the Conditions of Existence. By unity of type is meant that fundamental agreement in structure which we see in organic beings of the same class, and which is quite independent of their habits of life.
Стр. 10 - From these remarks it will be seen that I look at the term species, as one arbitrarily given for the sake of convenience to a set of individuals closely resembling each other, and that it does not essentially differ from the term variety, which is given to less distinct and more fluctuating forms.
Стр. 26 - Although much remains obscure, and will long remain obscure, I can entertain no doubt, after the most deliberate study and dispassionate judgment of which I am capable, that the view which most naturalists until recently entertained, and which I formerly entertained, namely, that each species has been independently created, is erroneous. I am fully convinced that species are not immutable...
Стр. 215 - TREATISE ON FOOD AND DIET: With Observations on the Dietetical Regimen suited for Disordered States of the Digestive Organs ; and an Account of the Dietaries of some of the principal Metropolitan and other Establishments for Paupers, Lunatics, Criminals, Children, the Sick, &c. By JON. PEREIRA, MDFRS & LS Author of
Стр. 195 - The reply is not doubtful for a moment, and has not been doubtful any time these thirty years. Without question, the mode of origin and the early stages of the development of man are identical with those of the animals immediately below him in the scale : — without a doubt, in these respects, he is far nearer the Apes, than the Apes are to the Dog.
Стр. 47 - I had not formerly sufficiently considered the existence of many structures which appear to be, as far as we can judge, neither beneficial nor injurious ; and this I believe to be one of the greatest oversights as yet detected in my work.
Стр. 68 - If such do occur, can we doubt (remembering that many more individuals are born than can possibly survive) that individuals having any advantage, however slight, over others, would have the best chance of surviving and of procreating their kind? On the other hand, we may feel sure that any variation in the least degree injurious would be rigidly destroyed. This preservation of favourable individual differences and variations, and the destruction of those which are injurious, I have called Natural...