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active Agassiz albuminous animal and vegetable animals and plants anorgana appear artificial selection become birds body causes cells chorology colour comparative anatomy conception conditions of existence connected consequence Creator crust Cuvier Darwin Darwin's theory different species distinguished divergence division of labour earth egg-cell example exceedingly explained external fact female formation fundamental Gastraea Theory Gastrula genera Goethe history of creation human hybrids idea important influence Inheritance and Adaptation inorganic Lamarck Linnaeus living male mammals manner matter mechanical migration Monera monistic natural selection naturalists non-sexual nutrition ontogeny organic forms organic nature organic species origin Pangenesis peculiar perfect period petrifactions phenomena philosophical plasma plastids possess produced progress propagation Protista race remarkable rudimentary organs scientific sexual simple single so-called species of animals teleological Theory of Descent theory of development Theory of Selection tion transformation transmission by inheritance transmitted variations varieties vegetable species vertebrate vertebrate animals whole
Page 389 - A celebrated author and divine has written to me that he has "gradually learnt to see that it is just as noble a conception of the Deity to believe that He created a few original forms capable of self-development into other and needful forms, as to believe that He required a fresh act of creation to supply the voids caused by the action of His laws.
Page 135 - Reflecting on these facts, and collecting analogous ones, it seemed to me probable that allied species were descended from a common ancestor. But during several years I could not conceive how each form could have been modified so as to become admirably adapted to its place in nature. I began, therefore, to Study domesticated animals and cultivated plants, and after a time perceived that man's power of selecting and breeding from...
Page ii - An active Principle : — howe'er removed From sense and observation, it subsists In all things, in all natures; in the stars Of azure heaven, the unenduring clouds, In flower and tree, in every pebbly stone That paves the brooks, the stationary rocks, The moving waters, and the invisible air.
Page 49 - had been announced, and widely accepted ; but in the organic world, the dogma of the miraculous creation of each separate species still held sway, almost as completely as when Linnaeus declared : " There are as many different species as there were different forms created in the beginning by the Infinite Being.
Page 37 - Its extraordinary success is explained not only by its close connection with Jewish and Christian doctrines, but also by the simple and natural chain of ideas which runs through it, and which contrasts favourably with the confused mythology of creation current among most of the other ancient nations.
Page 172 - ... by art, seems to be done with equal efficacy, though more slowly, by nature, in the formation of varieties of mankind, fitted for the country which they inhabit.
Page 112 - To him will always belong the immortal glory of having for ..the first time worked out the Theory of Descent, as an independent scientific theory of the first order, and as the philosophical foundation of the whole science of Biology.
Page 373 - ... strongly marked in one place, sometimes in another. Even if they happen so slowly that in the course of centuries the seashore rises or sinks only a few inches, or even only a few lines, still they nevertheless effect great results in the course of long periods of time. And long — immeasurably long — periods of time have not been wanting in the earth's history. During the course of many millions of years, ever since organic life existed on the earth, land and water have perpetually struggled...
Page 112 - Zoologique. How far it was in advance of its time is perhaps best seen from the circumstance that it was not understood by most men, and for fifty years was not spoken of at all.
Page 136 - But for some years I could not conceive how each form became so excellently adapted to its habits of life. I then began systematically to study domestic productions, and after a time saw clearly that man's selective power was the most important agent. I was prepared, from having studied the habits of animals, to appreciate the struggle for existence, and my work in geology gave me some idea of the lapse of past time. Therefore, when I happened to read " Malthus on Population," the idea DARWIN S METHOD...