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The Descent of Man

The Descent of Man

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As no one, as far as I can discover, has paid<br />

attention to the relative numbers <strong>of</strong> the two<br />

sexes throughout the animal kingdom, I will<br />

here give such materials as I have been able to<br />

collect, although they are extremely imperfect.<br />

<strong>The</strong>y consist in only a few instances <strong>of</strong> actual<br />

enumeration, and the numbers are not very<br />

large. As the proportions are known with certainty<br />

only in mankind, I will first give them as<br />

a standard <strong>of</strong> comparison.<br />

MAN.<br />

In England during ten years (from 1857 to 1866)<br />

the average number <strong>of</strong> children born alive yearly<br />

was 707,120, in the proportion <strong>of</strong> 104.5 males<br />

to 100 females. But in 1857 the male births<br />

throughout England were as 105.2, and in 1865<br />

as 104.0 to 100. Looking to separate districts, in<br />

Buckinghamshire (where about 5000 children<br />

are annually born) the MEAN proportion <strong>of</strong><br />

male to female births, during the whole period

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