 Consequently, if my theory be true, it is indisputable that before the lowest Silurian stratum was deposited, long periods elapsed, as long as, or probably far longer than, the whole interval from the Silurian age to the present day; and that during these...  The Darwinian Theory of the Transmutation of Species - Page 170by Robert Mackenzie Beverley - 1867 - 386 pagesFull view - About this book
 | Art - 1860 - 612 pages
...exclude it, what becomes of Mr. Darwin's theory ? " If my theory be true,' 1 writes Mr. Darwin—"it is indisputable that before the lowest Silurian stratum...interval from the Silurian age to the present day : aud that during these vast yet quite unknown periods of time, the world swarmed with living creatures."... | |
 | 1860 - 860 pages
...probably differed greatly from any known animal. And again (p. 307)— If my theory be true, it is indisputable that before the lowest silurian stratum...periods elapsed, as long as, or probably far longer thaii, the whole interval from the silurian age to the present day ; and that during these vast yet... | |
 | Crosthwaite and co - 1860 - 622 pages
...Silurian deposits, is a still graver difficulty ; for, " if my theory be true," says Mr. Darwin, " it is indisputable that before the lowest Silurian stratum...deposited long periods elapsed, as long as, or probably longer than, the whole interval from the Silurian age to the present day ; and that during these vast... | |
 | robert scott burn - 1861 - 738 pages
...frequently find Mr Darwin making such statements as the following : " If my tlreory he true, it is indisputable that before the lowest silurian stratum...of time, the world swarmed with living creatures. To the question why we do not find records of these vast primordial periods, I can give no satisfactory... | |
 | Charles Darwin - Evolution - 1861 - 470 pages
...and exterminted by their numerous and improved descendants. Consequently, if my theory be true, it is indisputable that before the lowest Silurian stratum...of time, the world swarmed with living creatures. To the question why we do not find records of these vast primordial periods, I can give no satisfactory... | |
 | Samuel Joseph Mackie - Geology - 1861 - 670 pages
...true, then before the deposition of the lowest Silurian strata there elapsed periods of time " probably longer than the whole interval from the Silurian age to the present day," during which " the world swarmed with living creatures ;" and I put to Lieutenant Hutton the question... | |
 | John Nash Griffin - Essays and reviews - 1862 - 354 pages
...link, shows that it is not taking place. Mr. Darwin admits that if his hypothesis be true, " *It is indisputable that, before the lowest Silurian stratum...age to the present day, and that during these vast and quite unknown periods of time, the world swarmed with living creatures ;" though while making this... | |
 | Bourchier Wrey Savile - Human beings - 1863 - 338 pages
...verbis. " If my theory be true," he observes, in his masterly work " On the Origin of Species," " it is indisputable that before the lowest Silurian stratum...elapsed, — as long as, or probably far longer than, the Silurian age to the present day; and that, during these vast, yet quite unknown periods of time, the... | |
 | Charles Darwin - Evolution - 1864 - 472 pages
...and exterminted by their numerous and improved descendants. Consequently, if my theory be true, it is indisputable that before the lowest Silurian stratum...of time, the world swarmed with living creatures. To the question why we do not find records of these vast primordial periods, I can give no satisfactory... | |
 | 1865 - 842 pages
...Silurian deposits, is a most serious difficulty. For, " if my theory be true," continues Darwin, " it is indisputable that before the lowest Silurian stratum...deposited long periods elapsed, as long as, or probably longer, than the whole interval from the Silurian age to the present day ; and that during these vast... | |
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