...It is an universal law, observable throughout the whole creation, that if two animals of a different species propagate, their offspring is unable to continue its own species...
Thomas Clarkson 「An Essay on the Slavery and Commerce of the Human Species, Particularly the African」
..." "In, this manner,too," adds Theophrastus, "the buried fish propagate, leaving behind them their spawn, which becomes vivifiedon the return of the waters to their accustomed bed...
J. Emerson Tennent 「Sketches of the Natural History of Ceylon」
...That aspecies should totally lose so universal an instinct as the maternal one,and yet avail itself of that affection in other species to propagate itself,seems a great mystery...
P. L. Sclater 「Argentine Ornithology, Volume I (of 2)」
...To improve and fix such varieties, he finds it necessary to encourage the buds at the bases of the most distinctly marked leaves, and to propagate from them alone...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...The means and measures to be employed to meet and resist the firstlocal causes which may generate the typhus, then the secondary causeswhich serve to propagate it...
Honoré Bourguignon 「On the cattle plague: or, Contagious typhus in horned cattle. Its history, origin, description, and treatment」
...They hybernate in the winter and propagate in thespring; and in times of drought burrow into the earth andremain lethargic until rain falls...
Various 「Natural History in Anecdote」
...You say they are not so thievish in Virginia, propagate faster, and areless depraved: Why? Because they are less cruelly treated...
Various 「The Journal of Negro History, Vol. I. Jan. 1916」
...We had not yet travelled quite so far westward; and but few natives were to be found thereabouts; they were likely therefore to remain for years unmolested, and securely to propagate their species...
David Collins 「An Account of the English Colony in New South Wales, Vol. 1」
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