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 for any number. Meanwhile, wherever they penetrate they will bring security and employment to the black races of the interior. These are now roughly estimated for Central Africa alone at 100,000,000. If they increase only at the rate of one per cent a year during the twenty years that have been assumed, the increase will be more than double the influx of whites. If they multiply as the blacks in the United States were once multiplying, they will have grown at the rate of 50,000,000, while the whites by an impossible rate of progression will only number 12,000,000. Under these circumstances, can we conceive any large part of the continent where the whites will be able to settle down, and develop an industrial civilisation, such as is found in any part of America and in Australia?

In all this discussion it has been assumed, for purposes of argument, that our imaginary European immigrants will be able to spread and establish themselves everywhere. No one can seriously expect this. There must be large tracts more or less like Senegambia and the parts about Sierra Leone, where only white men of exceptional constitutions, and submitting to a very strict regime, can live and do work. In the struggle for existence the African race, which can flourish everywhere in its native habitat, is bound to have an advantage over the race that can only thrive in the best parts of the continent.

It has seemed important to argue out the case of Central Africa at some length, because no other part of the world is supposed to furnish so magnificent an