 | United States. Congress. House - 586 páginas
...this species of louse through its different stages of metamorphoses, we find that they are similar jn character to other aphides, and are nearly of the...descendants, and it is supposed that, in a single year, there may be twenty generations. The impregnated ova, we find, are deposited in the axils of the leaves,... | |
 | William Kirby, William Spence - 1818 - 568 páginas
...year they are viviparous, at another oviparous ; and, what is most remarkable and without parallel, the sexual intercourse of one original pair serves...proceed from the female for a whole succeeding year. Reaumur has proved that in five generations one Aphis may be the progenitor of 5,904,900,000 descendants... | |
 | William Kirby, William Spence - 1822 - 618 páginas
...year they are viviparous, at another oviparous; and, what is most remarkable and without parallel, the sexual intercourse of one original pair serves...proceed from the female for a whole succeeding year. Reaumur has proved that in five generations one Aphis may be the progenitor of 5,904,900,000 descendants;... | |
 | Gill's scientific, technological and microscopic repository - 1829 - 424 páginas
...they are viviparous, at another oviparous ; what is most remarkable and without parallel, the sexiufl intercourse of one original pair serves for all the...proceed from the female for a whole succeeding year ! Reamur has proved that, in five generations, an aphis may be the progenitor of 5,904,900,000 descendants;... | |
 | Henry Stephens - 1844 - 748 páginas
...year they are viviparous, at another oviparous ; and what is most remarkable and without parallel, the sexual intercourse of one original pair serves...proceed from the female for a whole succeeding year. Beaumur has proved, that in 5 generations 1 aphis may be the progenitor of 5,904,000,000 descendants... | |
 | Cuthbert William Johnson - 1844 - 1210 páginas
...insect causes is not wonderful when we reflect on the astonishing fecundity of all the aphides family. The sexual intercourse of one original pair serves...all the generations which proceed from the female in the succeeding year; and Reaumur informs us, that, in five generalions, one aphis may be the progenitor... | |
 | William Kirby, William Spence - 1846 - 642 páginas
...year they are viviparous, at another oviparous; and, what is most remarkable and without parallel, the sexual intercourse of one original pair serves...proceed from the female for a whole succeeding year. Reaumur has proved that in five generations one Aphis may be the progenitor of 5,904,900,000 descendants... | |
 | 1848 - 910 páginas
...year they are viviparous, at another oviparous ; and what is most remarkable, and without parallel, the sexual intercourse of one original pair serves for all the generations which proceed (mm the female for a whole succeeding year. Reaumur has proved that in five generations one Aphis may... | |
 | Richard Owen - 1849 - 84 páginas
...year they are viviparous, at another oviparous ; and what is most remarkable and without parallel, the sexual intercourse of one original pair serves...proceed from the female for a whole succeeding year. Reaumur has proved that in five generations one Aphis may be the progenitor of 5,904,900,000 descendants... | |
 | sir Richard Owen - 1849 - 100 páginas
...year they are viviparous, at another oviparous ; and what is most remarkable and without parallel, the sexual intercourse of one original pair serves...proceed from the female for a whole succeeding year. Reaumur has proved that in five generations one Aphis may be the progenitor of 5,904,900,000 descendants... | |
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... and, what is most remarkable and without parallel, the sexual intercourse of one original pair serves for all the generations which proceed from the female for a whole succeeding year. 
