Darwinism Stated by Darwin Himself: Characteristic Passages from the Writings of Charles DarwinD. Appleton, 1884 - 351 من الصفحات |
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الصفحة iii
... have been obliged in some instances to sacrifice con- tinuity to perspicuity . But , as one object of this book is to correct misrepresentations by giving Darwin's views in his own language , some of his own repetitions.
... have been obliged in some instances to sacrifice con- tinuity to perspicuity . But , as one object of this book is to correct misrepresentations by giving Darwin's views in his own language , some of his own repetitions.
الصفحة 2
... instance , the tendril of Cobæa first rises vertically up , with its branches divergent and with the terminal hooks turned outward ; the young shoot at the extremity of the stem is at the same time bent to one side , so as to be out of ...
... instance , the tendril of Cobæa first rises vertically up , with its branches divergent and with the terminal hooks turned outward ; the young shoot at the extremity of the stem is at the same time bent to one side , so as to be out of ...
الصفحة 3
... instances tendrils bend toward the dark . 4. We have the spontaneous revolving movement which is independent of any outward stimulus , but is contingent on the youth of the part , and on vigorous health ; and this again , of course ...
... instances tendrils bend toward the dark . 4. We have the spontaneous revolving movement which is independent of any outward stimulus , but is contingent on the youth of the part , and on vigorous health ; and this again , of course ...
الصفحة 7
... instances of animals ren- dered sterile by confinement ; so that they will not unite , or , if they unite , do not produce offspring , though the confinement may be far from close ; and of plants ren- dered sterile by cultivation . But ...
... instances of animals ren- dered sterile by confinement ; so that they will not unite , or , if they unite , do not produce offspring , though the confinement may be far from close ; and of plants ren- dered sterile by cultivation . But ...
الصفحة 9
... instance of this fact is afforded by the Bignonia , which was fertilized by Fritz Müller with pollen from some adjoining plants and set hardly any seed , but , when fertilized with pollen from a distant plant , was highly fertile ...
... instance of this fact is afforded by the Bignonia , which was fertilized by Fritz Müller with pollen from some adjoining plants and set hardly any seed , but , when fertilized with pollen from a distant plant , was highly fertile ...
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عبارات ومصطلحات مألوفة
acquired action admit allied apes appear Asa Gray become believe birds blush body breeds Catarrhine cause characters closely Cloth DARWIN degree descended developed distinct species domestic doubt early effects eggs existence expression extinct eyes fact favorable feel females fertilization forms gemmules genera geotropism habit hair HERBERT SPENCER hermaphrodites highly horse increase individuals inhabitants inherited insects instance intermediate islands kind labellum lancelet language larvæ laws less living lower animals males mammals manner ment mental mind modified monkeys movements muscles natural selection naturalists observed offspring organic Origin of Species papillæ parent peculiar period plants pollen possess present principle probably produced Professor progenitors Quadrumana quadrupeds races remarkable resemble rudimentary savages seeds seems seen sexes sexual selection slight South America structure suppose T. H. HUXLEY tend tendency tion transmitted utricle variability variations varieties various vertebræ whole wild worms young
مقاطع مشهورة
الصفحة i - There is grandeur in this view of life, with its several powers, having been originally breathed by the Creator into a few forms or into one; and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being evolved.
الصفحة 347 - It is interesting to contemplate an entangled bank, clothed with many plants of many kinds, with birds singing on the bushes, with various insects flitting about, and with worms crawling through the damp earth, and to reflect that these elaborately constructed forms, so different from each other, and dependent upon each other in so complex a manner, have all been produced by laws acting around us.
الصفحة 110 - To suppose that the eye, with all its inimitable contrivances for adjusting the focus to different distances, for admitting different amounts of light, and for the correction of spherical and chromatic aberration, could have been formed by natural selection, seems, I freely confess, absurd in the highest possible degree.
الصفحة 72 - The key is man's power of accumulative selection: nature gives successive variations; man adds them up in certain directions useful to him. In this sense he may be said to have made for himself useful breeds.
الصفحة 254 - It is incredible that all these facts should speak falsely. He who is not content to look, like a savage, at the phenomena of nature as disconnected, cannot any longer believe that man is the work of a separate act of creation.
الصفحة 44 - It may be doubted whether there are many other animals which have played so important a part in the history of the world, as have these lowly organised creatures.
الصفحة 308 - But as my conclusions have lately been much misrepresented, and it has 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 thé exclusive means of modification.