Of the theory of human superfecundity: Its principle, as founded upon the population of the United States of America and China, stated and disproved

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J. Murray, 1830

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Страница 644 - Yea, the stork in the heaven knoweth her appointed times ; and the turtle, and the crane, and the swallow, observe the time of their coming; but my people know not the judgment of the LORD.
Страница 47 - But, to be perfectly sure that we are far within the truth, we will take the slowest of these rates of increase, a rate in which all concurring testimonies agree, and which has been repeatedly ascertained to be from procreation only. It may safely be pronounced, therefore, that population, when unchecked, goes on doubling itself every twenty-five years, or increases in a geometrical ratio.
Страница 28 - Hence marriages in America are more general, and more generally early than in Europe. And if it is reckoned there, that there is but one marriage per annum among one hundred persons, perhaps we may here reckon two ; and if in Europe they have but four births to a marriage (many of their marriages being late), we may here reckon eight, of which, if...
Страница 621 - Through the animal and vegetable kingdoms Nature has scattered the seeds of life abroad with the most profuse and liberal hand; but has been comparatively sparing in the room and the nourishment necessary to rear them.
Страница 224 - ... and by a decrease in the number of burials ; consequently by an increase in the excess of the births above the deaths. Also, that any material rise in the price is generally attended by a corresponding decrease in the marriages and...
Страница 659 - ... so abundant in the Greenland sea; while these latter constitute the food of several of the whale tribe inhabiting the same region : thus producing a dependent chain of animal life — one particular link being destroyed, the whole must necessarily perish.
Страница 357 - ... consequences of the more benevolent system ; and I challenge any one to say that they are overcharged if they are true ; or to deny their truth if he can believe that the Creator has, in virtue of that prescience, and conformably to that benevolence he has manifested in all other of his visible works, himself regulated the prolificness of his creatures in reference to the circumstances in which his providence shall place them, instead of leaving that regulation, minute as it will be seen it is...
Страница 490 - Population regulates itself by the funds which are to employ it, and therefore always increases or diminishes with the increase or diminution of capital.
Страница 30 - Married females do not become fruitful, on the average, during the first year of their nuptials, but nearly so. A great number of cases which I have collected, with a view of determining this point, give three-fourths of them as producing their first child at the average of one year after marriage.
Страница 333 - ... law: can it furnish an explanation? The first attempt to explain this phenomenon by statistical investigation was made by Hofacker, a German, in 1828. Two years later, but quite independently, Sadler, an Englishman, investigated the same subject. Both arrived at the same conclusion ; namely, that " the proportion in which the sexes are born is governed and regulated by the difference in the ages of their parents, in such manner that on the average, among the total of the births, the sex of that...

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