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adapted alluded animals and plants appear argued argument Asa Gray Autobiography Beagle believe biological causes of evolution cells changes CHAPTER characters Charles Darwin colour conclusions convinced Darwin wrote Darwin's letter Darwin's views Darwiniana descent difficulty doctrine domestic doubt elective affinity essay evidence existence explained expressed extinction facts faithfully favour feel fertilisation Francis Darwin friends gemmules geological germ-cells give Hence Hooker Huxley hybrid hypothesis important individual inherited insects interest Josiah Wedgwood Lamarck Linnean Society Lyell Meldola mind modification natural selection naturalists offspring opinion organic Origin of Species Pangenesis paper parent passenger pigeon pollen present probable produced Professor published quoted says scientific second edition seeds seems sexual selection single variations Sir Charles Lyell speculation struggle success supposed teleology theory of natural thought tion truth variability varieties volume voyage Wallace Wallace's Weismann's whole words writing written
Page 46 - observation of the habits of animals and plants, it at once struck me that under these circumstances favourable variations would tend to be preserved, and unfavourable ones to be destroyed. The result of this would be the formation of new species. Here then I had a theory by which to work.
Page 153 - It is often said that all the conditions for the first production of a living organism are now present, which could ever have been present. But if (and oh ! what a big if !) we could conceive in some warm little pond, with all sorts of
Page 171 - No other attempt, as far as I am aware, has been made, imperfect as this confessedly is, to connect under one point of view these several grand classes of facts. An organic being is a microcosm—a little universe, formed of a host of self-propagating organisms, inconceivably minute and numerous as the stars in heaven.
Page 14 - Autobiography": "I have steadily endeavoured to keep my mind free so as to give up any hypothesis, however much beloved (and I cannot resist forming one on every subject), as soon as facts are shown to be opposed to it.
Page 154 - ammonia and phosphoric salts, light, heat, electricity, etc., present, that a proteine compound was chemically formed ready to undergo still more complex changes, at the present day such matter would be instantly devoured or absorbed, which would not have been the case before living creatures were formed.
Page 22 - by far the most important event in my life, and has determined my whole career. ... I have always felt that I owe to the voyage the first real training or education of my mind
Page 27 - This wonderful relationship in the same continent between the dead and the living will, I do not doubt, hereafter throw more light on the appearance of organic beings on our earth, and their disappearance from it, than any other class of facts
Page 11 - Our minds and tastes were, however, so different, that I do not think I owe much to him intellectually. I am inclined to agree with Francis Galton in believing that education and environment produce only a small effect on the mind of anyone, and that most of our qualities are innate" (" Life and Letters,