cent. In this period the increase of Georgia and South Carolina, the
two importing States, was only 96,000, while that, of the white
population was 129,073, carrying with them perhaps 25,000. If to this
be added the natural increase at the rate of 25 per cent., we obtain
about 75,000, leaving only 21,000 for importation. It is probable,
however, that it was somewhat larger, and that it might be safe to
estimate it at the same amount as in the previous period, making a
total of about 52,000 in the twenty years. Deducting 26,000 from the
350,000, we obtain 324,000 as the addition from domestic sources,
which would be about 32 per cent. on the population of 1800. This may
be too high; and yet the growth of the following decennial period--one
of war and great commercial and agricultural distress--was almost
thirty per cent. In 1810, the number had been 1,379,800.

In 1820 it was 1,779,885; increase 30 per cent.
" 1830 " 2,328,642; " 30.8 " "
" 1840 " 2,873,703; " 24 " "
" 1850 " 3,591,000; " 25 " " [11]

Having thus ascertained, as far as possible, the ratio of increase
subsequent to the first census, we may now proceed to an examination
of the course of affairs in the period which had preceded it.

In 1714, the number of blacks was 58,850, and they were dispersed
throughout the provinces from New Hampshire to Carolina, engaged, to a
large extent, in labours similar to those in which were engaged the
whites by whom they were owned. One-half of them may have been
imported. Starting from this point, and taking the natural increase of
each decennial period at 25 per cent., as shown to have since been the
case, we should obtain, for 1750, about 130,000. The actual quantity