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See page in:
1859
1860
1861
1866
1869
1872

Compare with:
1859
1860
1861
1869
1872

→ by some breeders, 1859 1860 1861 1866 1869
in the one case, 1872
→ As 1859 1860 1861 1866 1869
Ultimately, after the lapse of centuries, these sub-breeds would become converted into two well-established and distinct breeds. As 1872
→ neglected, 1859 1860 1861 1866 1869
used for breeding, 1872
→ (though it was a long time before I saw how), from 1861 1866 1869 1872
from 1859 1860
selection of swifter horses →by some breeders, and of stronger ones
in the
by
other,
others,
the differences would become greater, and would be noted as forming two
sub-breeds.
sub-breeds;
finally,
finally,
after
after
the
the
lapse
lapse
of
of
centuries
centuries,
centuries,
the
the
sub-breeds
sub-breeds
would
would
become
become
converted
converted
into
into
two
two
well-established
well-established
and
and
distinct
distinct
breeds.
breeds.
→As the differences
slowly
slowly
became
become
greater, the inferior animals with intermediate characters, being neither very swift nor very strong,
would
would not
will
have been →neglected, and will
thus have
have
tended to
tended to
disappeared.
disappear.
Here, then, we see in
mans
man's
productions the action of what may be called the principle of divergence, causing differences, at first barely appreciable, steadily to increase, and the breeds to diverge in
character,
character
both from each other and from their common parent.
But how, it may be asked, can any analogous principle apply in nature? I believe it can and does apply most
efficiently,
efficiently
→(though it was a long time before I saw how), from the simple circumstance that the more diversified the descendants from any one species become in structure, constitution, and habits, by so much will they be better enabled to seize on many and widely diversified places in the polity of nature, and so be enabled to increase in numbers.
We can clearly
see
discern
this in the case of animals with simple habits. Take the case of a carnivorous quadruped, of which the number that can be supported in any country has long ago arrived at its full average. If its natural
power
powers
of increase be allowed to act, it can succeed in increasing (the country not undergoing any change in
its
its
conditions) only by its varying descendants seizing on places at present occupied by other
animals;
animals:
some of them, for instance, being enabled to feed on new kinds of prey, either dead or alive; some inhabiting new stations, climbing trees, frequenting water, and some perhaps becoming less carnivorous. The