But at the same time, in what concerns the fruitfulness of marriage, it is the farthest behind; and since 1780 prolificacy has continually decreased there.
But, indeed, the individual is little valued in Africa, on account of the great prolificacy of the African race.
Footnote 240-1: That rich food directly increased prolificacy is proved from the fact that, for instance, our domestic animals are much more prolific than wild ones of the same species.
The monogenists, who have based the demonstration of the unity of the human species upon the physiological character of the prolificacy of the cross-breeds, have not taken into account these elements.
Yet the Mulattoes of the French, Portuguese, and Spanish colonies seem gifted with a much greater prolificacy than the Dutch or Chinese Mulattoes of Malasia.
The succeeding records of sows of the same families afforded the best possible confirmation of the belief which was becoming general that prolificacy like many other qualities was most certainly hereditary.
That which takes place between closely proximate species; among mankind, for example, and among those domestic animals most essential to human wants and happiness; here the prolificacy is unlimited.
Whether the prolificacy is unlimited between all the races or species of men is still an unsettled point, and experiments have not yet been fully and fairly made to determine the question.
The argument in favor of unlimited prolificacy between species may be strongly corroborated by an appeal to the history of our domestic animals, whose history is involved in the same impenetrable mystery as that of man.
It seems probable that some Brown Chinese blood has been crossed into the Africans on various occasions probably for the purpose of increasing the prolificacy of the African as the Brown Chinese is an excellent layer.
In making the mating in breeding geese it must be kept in mind that it is of primary importance to select the breeders first of all for size, prolificacy and vitality.
