 | 1854 - 492 páginas
...deserve more attention. The first of these is that advanced by Kirby and Spence.f According to them "One conjunction of the sexes suffices for the impregnation...succession of generations spring from that union." In support of the reasonableness of this hypothesis, they quote several instances which they regard... | |
 | William Kirby, William Spence - 1826 - 676 páginas
...the summer in the usual manner'. The most likely supposition therefore is, that one conjunction o£ the sexes suffices for the impregnation of all the...succession of generations spring from that union. It is true that at the first view -this supposition appears incredible, contradicting the ganeral laws... | |
 | 1854 - 408 páginas
...deserve more attention. The first of these is that advanced by Kirby and Spence. According to them, " One conjunction of the sexes suffices for the impregnation...succession of generations spring from that union." In support of the reasonableness of this hypothesis, they quote several instances which they regard... | |
 | 1854 - 404 páginas
...deserve more attention. The first of these is that advanced by Kirby and Spence. According to them, " One conjunction of the sexes suffices for the impregnation...succession of generations spring from that union." In support of the reasonableness of this hypothesis, they quote several instances which they regard... | |
 | Richard Owen - 1855 - 1196 páginas
...ingenious authors of the deservedly popular "Introduction to Entomology" admit it to be "an incontestible fact that female Aphides have the faculty of giving...hive-bee, " in which a single intercourse with the male fertilises all the eggs that are laid for the space of two years ; " and the case of a common spider,... | |
 | American Association for the Advancement of Science - 1856 - 354 páginas
...deserve more attention. The first of these is that advanced by Kirby and Spence.§ According to them, " One conjunction of the sexes suffices for the impregnation...succession of generations spring from that union." In support of the reasonableness of this hypothesis, they quote several instances which they regard... | |
 | American Association for the Advancement of Science - 1856 - 344 páginas
...deserve more attention. The first of these is that advanced by Kirby and Spence.§ According to them, " One conjunction of the sexes suffices for the impregnation...succession of generations spring from that union." In support of the reasonableness of this hypothesis, they quote several instances which they regard... | |
 | William Kirby, William Spence - 1828 - 752 páginas
...united towards the close of the summer in the usual manner a. The most likely supposition therefore is, that one conjunction of the sexes suffices for the...succession of generations spring from that union. It is true that at the first view this supposition appears incredible, contradicting the general laws... | |
 | 1854 - 516 páginas
...deserve more attention. The first of these is that advanced by Kirby and Spence*. According to them, "One conjunction of the sexes suffices for the impregnation...succession of generations spring from that union." In support of the reasonableness of this hypothesis, they quote several instances which they regard... | |
 | 1854 - 956 páginas
...deserve more attention. The first of these is that advanced by Kirby and Spence.f According to them " One conjunction of the sexes suffices for the impregnation...succession of generations spring from that union." In support of the reasonableness of this hypothesis, they quote several instances which they regard... | |
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One conjunction of the sexes suffices for the impregnation of all the females that in a succession of generations spring from that union." In support of the reasonableness of this hypothesis, they quote several instances which they regard as of analogous... 