rsity, while the original still continues to
produce its like. By and by the variety, having a greater tendency to
vary, from its having already done so, undergoes a new differentiation,
the difference being, in all cases, slight, and the time between the
periods of maximum change being hundreds, thousands of years. One of the
new varieties may by peculiar circumstances take on a special amplitude
of growth, while the other, peculiarly circumstanced, may be contracted
and dwarfed. One of the original varieties may by this time have
disappeared. The original itself may have disappeared. Thus the
connecting link between the two forms is lost. The more individualized
form may go on accenting its own peculiar characters, and again be
broken into new varieties, some of which may retain the old characters
in circumscribed areas, while others may increase in greater abundance
and occupy a much wider area. The wider the field of life, the more
numerous the differing influences and the more diverse the conditions
the animal must undergo. Thence arise more differentiations. After the
lapse of some millions of ages, these constantly forking growths will
have taken on a diversity to which that of the pouters and fan-tails is
trifling.

Some forms may be less plastic than others, and give way less readily to
the incident forces. These may remain unchanged for a far longer period
than subsequent varieties, and be coexistent with them. Some varieties
may take on a cerebral growth as widely different and as strongly
individualized as frame structure. Man himself is a striking instance.
The Negro, the Malay, the Mongolian, are almost precisely what they were
five thousand years ago. The Bushman, the Hottentot, the Patagonian, and
the Digger Indian are to-day not much above the animals about them;
while the Caucasian has gone on in a wonderful advancement, leaving the
other races in the same state of development in which they were when the
Caucasian was no farther advanced than they. And here is perhaps the
place to allude to the derisive objection to Darwinism, that it makes
man an improved monkey. Darwin's theory certainly gives to both some
vastly remote common ancestor; but it does not maintain the
metamorphosis of one into the other. It does not suppose that man was
once a gorilla. It supposes that from out of some of the
differentiations of some animal form arose the first man-like creature,
and that, gradually changing, like other