 | Charles Dudley Warner - 1897 - 494 páginas
...head above the stems of the heath, and had failed. No wonder that as soon as the land was inclosed it became thickly clothed with vigorously growing...insects determine the existence of cattle. Perhaps Paraguay offers the most curious instance of this; for here neither cattle nor horses nor dogs have... | |
 | Charles Dudley Warner - 1897 - 492 páginas
...wonder that as soon as the land was inclosed it became thickly clothed with vigorously growing )'oung firs. Yet the heath was so extremely barren and so...insects determine the existence of cattle. Perhaps Paraguay offers the most curious instance of this; for here neither cattle nor horses nor dogs have... | |
 | Alfred Russel Wallace - 1901 - 542 páginas
...heather and had failed. Yet this heath was very extensive and very barren, and, as Mr. Darwin remarks, no one would ever have imagined that cattle would have so closely and so effectually searched it for food. In the case of animals, the competition and struggle are more... | |
 | Charles Darwin - 1902 - 238 páginas
...growth, had during many years tried to raise its head above the stems of the heath, and had failed. No wonder that, as soon as the land was enclosed, it...insects determine the existence of cattle. Perhaps Paraguay offers the most curious instance of this ; for here neither cattle nor horses nor dogs have... | |
 | Dennis Hird - 1903 - 260 páginas
...growth, had, during many years, tried to raise its head above the stems of the heath, and had failed. No wonder that, as soon as the land was enclosed, it...the world insects determine the existence of cattle. " I find from experiments that humble-bees are almost indispensable to the fertilisation of the heartsease... | |
 | 1906 - 426 páginas
...drive the animals out. Thus Wallace1 observes: "The next case I will give in Mr. Darwin's own words: 'In several parts of the world insects determine the existence of cattle. Perhaps Paraguay offers the most curious instance of this; for here neither cattle nor horses nor dogs have... | |
 | 1883 - 900 páginas
...which is acted upon. Consider, for instance, the following passage in the " Origin of Species " : — " In several parts of the world insects determine the existence of cattle : perhaps Paraguay offers the most curious instance of this ; for here neither cattle nor horses nor dogs have... | |
 | 1903 - 326 páginas
...growth, had during many years tried to raise its head above the stems of the heath, and failed. No wonder that as soon as the land was enclosed it became...absolutely determine the existence of the Scotch fir. . . ." (" Origin of Species," sixth edition, 1885, p. 56). I need only add that " Past and Present"... | |
 | Charles Darwin - 1909 - 584 páginas
...growth, had, during many years, tried to raise its head above the stems of the heath, and had failed. No wonder that, as soon as the land was enclosed, it...insects determine the existence of cattle. Perhaps Paraguay offers the most curious instance of this; for here neither cattle nor horses nor dogs have... | |
 | Harry Marshall Ward - 1909 - 334 páginas
...growth, had, during many years tried to raise its head above the stems of the heath, and had failed. No wonder that, as soon as the land was enclosed, it...absolutely determine the existence of the Scotch fir." I have myself gathered a Larch on the ice-locked moraine of the Aletsch Glacier, which, although only... | |
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I counted thirtytwo little trees ; and one of them, with twenty-six rings of growth, had during many years tried to raise its head above the stems of the heath, and had failed. No wonder that, as soon as the land was enclosed, it became thickly clothed... 
