 | Daniel Kimball Whitaker, Milton Clapp, William Gilmore Simms, James Henley Thornwell - 1846 - 570 pàgines
...and wolf. Blumenbach, than whom there can be no higher authority on a point of this kind, tells us, that "No general rule can be laid down for determining...case we must be guided by analogy and probability." M. Desmoulins (Virey, and others,) tells us that. "it is the permanence of type under opposite influences... | |
 | James Richardson Logan - 1847 - 590 pàgines
...separalely, are no safe guides, and unfortunately they are not always found combined. Blumenbach wisely observes that " no general rule can be laid down for...class of characters which can serve as a criterion." *<rme kinds are very liable to it, particularly the genus Nassa, many species of which are common here.... | |
 | 1847 - 560 pàgines
...separately, arc no safe guides, and unfortunately they are not always found combined. Blumcnbach wisely observes that " no general rule can be laid down for...species, as there is no particular class of characters wliicli can serve as a criterion." This variable tendency does not prevail in all shells, though some... | |
 | Sir Charles Lyell - 1865 - 880 pàgines
...genealogy of his species, and looks forward, as if in compensation, to the future perfectibility of man iu his physical, intellectual, and moral attributes....which can serve as a criterion. In each case we must bo guided by analogy and probability" The multitude, in fact, and complexity of the proofs to be weighed... | |
 | Sir Charles Lyell - 1868 - 692 pàgines
...just so many species as there were different forms created in the beginning.' § Blumenbach declared that ' no general rule can be laid down for determining...case we must be guided by analogy and probability.' In former editions of this work from 1832 to 1853, I did not venture to differ from the opinion of... | |
 | Hudson Tuttle - 1870 - 320 pàgines
...laid down for the determining the distinction of species, as there are no peculiar characteristics which can serve as a criterion, In each case we must be guided by analogy and probability" We see on what trivial characteristics naturalists are obliged to rely for the determination of specific... | |
 | Hudson Tuttle - 1909 - 498 pàgines
...laid down for the determining the distinction of species, as there are no peculiar characteristics which can serve as a criterion. In each case we must be guided by analogy and probability." We see on what trivial characteristics naturalists are obliged to rely for the determination of specific... | |
 | Charles Lyell - 1990 - 352 pàgines
...as to the stability of the specific character, and he thinks he can discern an inseparable connexion between a series of changes in the inanimate world,...as a criterion. In each case we must be guided by analoyy and probability,'" The multitude, in fact, and complexity of the proofs to be weighed, is so... | |
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Blumenbach judiciously observes, "that no general rule can be laid down for determining the distinctness of species, as there is no particular class of characters which can serve as a criterion. 