| Forests and forestry - 1883 - 756 pages
...had during many years tried to " raise its head above the sterns of the heath, and had failed. No " wonder that as soon as the land was enclosed, it became thickly " clothed with rigorously growing young firs." I cannot believe that this does not take place in deodar forests also,... | |
| Richard Anthony Proctor - Astronomy - 1883 - 438 pages
...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... | |
| Theodore Wood - Insects - 1884 - 248 pages
...has been touched upon by the late Charles Darwin in his "Origin of Species," page 56. He says: — "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... | |
| Alfred Russel Wallace - Evolution - 1889 - 526 pages
...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... | |
| Forests and forestry - 1890 - 604 pages
...of the heath, and had failed. No wonder that, as soon as the land was enclosed, it became tliickly clothed with vigorously growing young firs. Yet the...absolutely determine the existence of the Scotch fir." Again, in a paper on the Island of Cyprus, published in the Revue des Eaux et Far&ts for February 1874,... | |
| 1890 - 1466 pages
...heath when planted with Scotch fir, 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 attacksof... | |
| Thomas Spencer Baynes - Encyclopedias and dictionaries - 1890 - 924 pages
...heath when planted with Scotch fir, 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... | |
| University of Toronto - Electronic journals - 1895 - 704 pages
...remarkable complexity in the relations existing between all animal and plant forms. An example is, that in several parts of the world insects determine the existence of cattle. A peculiar example is described by Darwin, namely, that on a large, widely extended heath in a certain... | |
| Charles Darwin - Evolution - 1896 - 406 pages
...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... | |
| Charles Darwin - Science - 1896 - 408 pages
...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...food. Here we see that cattle absolutely determine th« existence of the Scotch, fir ; but in several parts of the world insects determine the existence... | |
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