 ; and being well prepared to appreciate the struggle for existence which everywhere goes on from longcontinued observation of the habits of animals and plants, it at once struck me that under these circumstances favorable variations would tend to be...  The New International Encyclopaedia - Page 283edited by - 1906Full view - About this book
 | Charles Darwin - Naturalists - 1887 - 588 pages
...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 ; but I was so anxious to avoid... | |
 | Charles Darwin - 1887 - 570 pages
...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 ; but I was so anxious to avoid... | |
 | Charles Darwin - Autobiography - 1887 - 420 pages
...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 ; but I was so anxious to avoid... | |
 | William Parker Cutler - 1888 - 1034 pages
...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 ; . but I was so anxious to avoid... | |
 | 1888 - 386 pages
...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 ; but I was so anxious to avoid... | |
 | Thomas Robert Malthus, George Thomas Bettany - Population - 1890 - 714 pages
...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." (Now that it is very generally... | |
 | Charles Frederick Holder - 1891 - 374 pages
...for existence between various forms, " favourable variations tend to be preserved, and unfavourable ones to be destroyed. The result of this would be the formation of a new species." The idea must have come to him like a sudden flash of light that was, indeed, to illumine... | |
 | Charles Darwin - Autobiography - 1892 - 372 pages
...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 ; but I was so anxious to avoid... | |
 | W. T. B. Martin, T. E. S. T. - Instinct - 1894 - 536 pages
...me that under . . . 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. But at that time I overlooked one problem of great importance. . . . This is the tendency... | |
 | Ainsworth Rand Spofford - Biography - 1895 - 476 pages
...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...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 ; but I was so anxious to avoid... | |
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