 | Sir Patrick Geddes, John Arthur Thomson - 1911 - 266 páginas
...heath when planted with Scots pine, these again being wholly dependent upon the exclusion of cattle. But in several parts of the world insects determine the existence of cattle. Again, red clover depends for fertilization upon the humble-bees, these upon immunity from the attacks... | |
 | 1919 - 716 páginas
...thic-kly clothed with vigorously-growing youne firs. Yet the heath was BO extremely barren, and BO extensive, that no one would ever have imagined that cattle would have searched it so closely and effectually for food." Trie heaths of Europe are very fimilar to our " hnrrrns"... | |
 | Alfred Russel Wallace - 1889 - 523 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... | |
 | Alfred Louis Kroeber, Thomas Talbot Waterman - 1924 - 606 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 Scotch fir, but in several parts of the world inserts determine the existence of cattle. Perhaps Paraguay offers the most curious instance of this;... | |
 | Rudolph Wilson Chamberlain, Joseph Sheldon Gerry Bolton - 1923 - 396 páginas
...above the stems of the heath, and had failed. No wonder that, as soon as the land was inclosed, it had became thickly clothed with vigorously growing young...insects determine the existence of cattle. Perhaps Paraguay offers the most curious instance of this; for here neither cattle nor horses nor dogs have... | |
 | Rudolf Wilson Chamberlain, Joseph Sheldon Gerry Bolton - 1923 - 392 páginas
...above the stems of the heath, and had failed. No wonder that, as soon as the land was inclosed, it had became thickly clothed with vigorously growing young...have so closely and effectually searched it for food. horses nor dogs have ever run wild, though they swarm southward and northward in a feral state; and... | |
 | Samuel Jackson Holmes - 1926 - 476 páginas
...Darwin. After speaking of the influence of cattle in checking the growth of Scotch fir, he remarks: 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... | |
 | Samuel Jackson Holmes - 1926 - 470 páginas
...Darwin. After speaking of the influence of cattle in checking the growth of Scotch fir, he remarks: 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... | |
 | 1866 - 796 páginas
...had during twenty-six years tried to raise its head above the stems of the heath, and had failed. No cen barren and so extensive that no one would ever have imagined that cattle would have so closely and... | |
 | George Levine - 1991 - 334 páginas
...careful observation shows that where cattle graze the fir gets no chance to grow; and in the fact that "in several parts of the world insects determine the existence of cattle" (Origin, p. 124). Clearly, the enclosure acts were not designed to affect the growth of Scotch fir,... | |
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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... 
