 | United States. Congress. House - 586 páginas
...At one period of the year they are oviparous; at another, viviparous; and what is most remarkable, the sexual intercourse of one original pair serves...all the generations which proceed from the female for a whole succeeding year, before the spermatic virtue of the ancestral coitus is exhausted. It has... | |
 | William Kirby, William Spence - 1818 - 568 páginas
...multiplication of these little creatures is infinite and almost incredible. Providence has endued them with privileges promoting fecundity, which no other insects...all the generations which proceed from the female for a whole succeeding year. Reaumur has proved that in five generations one Aphis may be the progenitor... | |
 | William Kirby, William Spence - 1822 - 618 páginas
...Providence has endued them with privileges promoting fecundity, which no other insects possess : at one tune of the year they are viviparous, at another oviparous;...all the generations which proceed from the female for a whole succeeding year. Reaumur has proved that in five generations one Aphis may be the progenitor... | |
 | 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 generations which proceed from the female for a whole succeeding year ! Reamur has proved that, in five generations, an aphis may be the progenitor... | |
 | Henry Stephens - 1844 - 748 páginas
...little creatures is infinite and almost incredible. Providence has endued them with privileges for promoting fecundity, which no other insects possess...all the generations which proceed from the female for a whole succeeding year. Beaumur has proved, that in 5 generations 1 aphis may be the progenitor... | |
 | 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
...multiplication of these little creatures is infinite, and almost incredible. Providence has endued them with privileges promoting fecundity, which no other insects...all the generations which proceed from the female for a whole succeeding year. Reaumur has proved that in five generations one Aphis may be the progenitor... | |
 | 1848 - 910 páginas
...multiplication of these little creatures is infinite and almost incredible. Providence has endued them with privileges promoting fecundity, which no other insects...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... | |
 | sir Richard Owen - 1849 - 100 páginas
...multiplication of these little creatures is infinite and almost incredible. Providence has endued them with privileges promoting fecundity, which no other insects...all the generations which proceed from the female for a whole succeeding year. Reaumur has proved that in five generations one Aphis may be the progenitor... | |
 | 1855 - 766 páginas
...hundred thousand descendants ; and it is supposed that in one year there may be twenty generations ; and what is most remarkable and without parallel,...all the generations which proceed from the female for a whole succeeding year."* Here is a problem, which, ably and correctly worked out, will outvie... | |
| |
... 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. Reaumur has proved that in five generations one Aphis may be the... 
