The Naturalist as Interpreter and Seer ...Doubleday, Page, 1902 - Всего страниц: 173 |
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Стр. 31
... probably serves as a fair measure of the relative , though not actual lapse of time . A number of species , however , keeping in a body might remain for a long period unchanged , while within the same period , several of these species ...
... probably serves as a fair measure of the relative , though not actual lapse of time . A number of species , however , keeping in a body might remain for a long period unchanged , while within the same period , several of these species ...
Стр. 49
... probably deserve to rank as man . It must not be supposed that the divergence of each race from the other races , and of all from a common stock , can be traced back to any one pair of progenitors . On the contrary , at every stage in ...
... probably deserve to rank as man . It must not be supposed that the divergence of each race from the other races , and of all from a common stock , can be traced back to any one pair of progenitors . On the contrary , at every stage in ...
Стр. 50
... probably arboreal in its habits [ living on or among trees ] and an inhabitant of the Old World . This creature , if its whole structure had been examined by a naturalist , would have been classed among the Quadrumana , as surely as the ...
... probably arboreal in its habits [ living on or among trees ] and an inhabitant of the Old World . This creature , if its whole structure had been examined by a naturalist , would have been classed among the Quadrumana , as surely as the ...
Стр. 63
... probably follow from the females - especially the more vigorous ones , which would be the first to breed - preferring not only the more attractive but at the same time the more vigorous and victorious males . Although we have some ...
... probably follow from the females - especially the more vigorous ones , which would be the first to breed - preferring not only the more attractive but at the same time the more vigorous and victorious males . Although we have some ...
Стр. 87
... probably been brought about . Returning to the higher animals , let us consider the remarkable fact of the rarity of white colouring in the mammalia or birds of the temperate or tropical zones in a state of nature . There is not a ...
... probably been brought about . Returning to the higher animals , let us consider the remarkable fact of the rarity of white colouring in the mammalia or birds of the temperate or tropical zones in a state of nature . There is not a ...
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act of creation adapted admit algæ allied species Anchitherium Asa Gray bark beauty become beetles believe birds blossoms bone butterflies Charles Darwin closely allied colour common conceal creature descended developed digits distinct disuse diverged in character doubt early progenitor earth enemies Eocene equine Europe evidence evolution exactly existence extinct facts female fibula flowers forms fossils fungus genera genus germinal vesicle grinders groups habits Hence Hipparion horse important independently created inhabitants inherited injurious insects larvæ laws leaf living look lower animals males mammals manner marvel means Miocene modification moth natural selection naturalists organic Origin of Species Orohippus parasitic peculiar period Pliocene pollen present prey principle produced Professor Protohippus resemble rudimentary scale scale insects sexual selection slight structure successive teeth tend theory of creation theory of descent tints tion trees tropical ulna varieties whole widely different wild wings wonderful
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Стр. 37 - I happened to read for amusement 'Malthus on Population,' and being well prepared to appreciate the struggle for existence which everywhere goes on from long-continued 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 at last got a theory by which to work...
Стр. 34 - 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.
Стр. 68 - Important as the struggle for existence ha^s been and even still is, yet as far as the highest part of man's nature is concerned there are other agencies more important. For the moral qualities are advanced, either directly or indirectly, much more through the effects of habit, the reasoning powers, instruction, religion, etc., than through natural selection ; though to this latter agency the social instincts, which afforded the basis for the development of the moral sense, may be safely attributed.
Стр. 33 - These laws, taken in the largest sense, being Growth with Reproduction; Inheritance which is almost implied by reproduction, Variability from the indirect and direct action of the external conditions of life, and from use and disuse...
Стр. 29 - ... the summing up of the labour, the experience, the reason, and even the blunders of numerous workmen; when we thus view each organic being, how far more interesting — I speak from experience — does the study of natural history become!
Стр. 46 - ... man is descended from some less highly organized form. The grounds upon which this conclusion rests will never be shaken, for the close similarity between man and the lower animals in embryonic development, as well as in innumerable points of structure and constitution, both of high and of the most trifling importance — the rudiments which he retains, and the abnormal reversions to which he is occasionally liable — are facts which cannot be disputed.
Стр. 29 - We possess no pedigree or armorial bearings; and we have to discover and trace the many diverging lines of descent in our natural genealogies, by characters of any kind which have long been inherited. Rudimentary organs will speak infallibly with respect to the nature of long-lost structures. Species and groups of species which are called aberrant, and which may fancifully be called living fossils, will aid us in forming a picture of the ancient forms of life. Embryology will often reveal to us the...
Стр. 41 - I had, also, during many years followed a golden rule, namely, that whenever a published fact, a new observation or thought came across me, which was opposed to my general results, to make a memorandum of it without fail and at once; for I had found by experience that such facts and thoughts were far more apt to escape from the memory than favorable ones. Owing to this habit, very few objections were raised against my views which I had not at least noticed and attempted to answer.
Стр. 32 - In the distant future I see open fields for far more important researches. Psychology will be based on a new foundation, that of the necessary acquirement of each mental power and capacity by gradation. Light will be thrown on the origin of man and his history.
Стр. 38 - The solution, as I believe, is that the modified offspring of all dominant and increasing forms tend to become adapted to many and highly diversified places in the economy of nature.