We might expect the throne for some generations to be occupied by a more or less yellow king; but can any one believe that the whole island will gradually acquire a white, or even a yellow, population ?" "Darwin says that in the struggle for life a grain may turn the balance in favour of a given structure, which will then be preserved.

But one of the weights in the scale of nature is due to the number of a given tribe.

Let there be 7000 A's and 7000 B's, representing two varieties of a given animal, and let all the B's, in virtue of a slight difference of structure, have the better chance of life by 1/7000 part.

We must allow that there is a slight probability that the descendants of B will supplant the descendants of A; but let there be only 7001 A's against 7000 B's at first, and the chances are once more equal, while if there be 7002 A's to start, the odds would be laid on the A's.

True, they stand a greater chance of being killed; but then they can better afford to be killed.