Comentarios de la gente - Escribir un comentario
No encontramos ningún comentario en los lugares habituales.
Otras ediciones - Ver todas
absolute accept adaptation Agassiz appears atheistical auroch believe Boston reviewers categories of thought common community of origin creation Darwin's hypothesis Darwin's particular Darwin's theory derivation of species derivative hypothesis descendants design in Nature difficulties direct distinct divergence diversification Divine doctrine doubt Edinburgh Review efficient cause epoch equally evidence existing explain extinct species facts favor final causes genealogical connection genera genus geological geological period gradations green woodpeckers ground higher brute hippopotamus human hypoth idea individuals infer insist instinct intelligence Journal of Science kindred less lines living mastodons material connection mode natural selection naturalists nebular hypothesis North American Review objections operation organic Nature origin of species parent perfect perhaps period philosophical physical Pictet plants and animals present primordial probably prove question races rhinoceros scientific secondary causes sort structure suggest supernatural suppose supposition things tion transmutation uniformitarian variation and natural varieties vary Wherefore whole
Página 28 - Let the earth bring forth the living creature after his kind, cattle, and creeping thing, and beast of the earth Sixth after his kind " : and it was so. And God made the Day beast of the earth after his kind...
Página 13 - 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...
Página 13 - ... been stated that I attribute the modification of species exclusively to natural selection, I may be permitted to remark that in the first edition of this work, and subsequently, I placed in a most conspicuous position — namely, at the close of the Introduction the following words : "I am convinced that natural selection has been the main but not the exclusive means of modification.
Página 21 - ... and failures utterly dishearten him. All these things, it may naturally be said, go to explain the order, not the mode, of the incoming of species. But they all do tend to bring out the generalization expressed by Mr. Wallace in the formula that " every species has come into existence coincident both in time and space with preexisting closely-allied species.
Página 13 - ... such low and intermediate form, both animals and plants may have been developed; and, if we admit this, we must likewise admit that all the organic beings which have ever lived on this earth may be descended from some one primordial form. But this inference is chiefly grounded on analogy, and it is immaterial whether or not it be accepted.
Página 37 - Let this process go on for millions of years; and during each year on millions of individuals of many kinds; and may we not believe that a living optical instrument might thus be formed as superior to one of glass, as the works of the Creator are to those of man?
Página 13 - I believe that animals have descended from at most only four or five progenitors, and plants from an equal or lesser number.
Página 13 - Therefore I should infer from analogy that probably all the organic beings which have ever lived on this earth, have descended from some one primordial form, into which life was first breathed.
Página 45 - But do they really believe that at innumerable periods in the earth's history certain elemental atoms have been commanded suddenly to flash into living tissues?
Página 26 - I by no means expect to convince experienced naturalists whose minds are stocked with a multitude of facts all viewed, during a long course of years, from a point of view directly opposite to mine. It is so easy to hide our ignorance under such expressions as the " plan of creation," " unity of design," &c., and to think that we give an explanation when we only restate a fact.