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his products be, 1859 1860 1861 1866
be his results, 1869 1872

every variation, even 1859 1860 1861 1866
OMIT 1869 1872

rejecting that which is 1859 1860 1861 1866
variations; rejecting those that are 1869 1872

and a short beaked pigeon on the same food; he does not exercise a long-backed or long-legged quadruped in any peculiar manner; he exposes sheep with long and short wool to the same climate. He does not allow the most vigorous males to struggle for the females. He does not rigidly destroy all inferior animals, but protects during each varying season, as far as lies in his power, all his productions. He often begins his selection by some half-monstrous form; or at least by some modification prominent enough to catch
the
his
eye
eye,
or to be plainly useful to him. Under nature, the slightest
differences
difference
of structure or constitution may well turn the nicely-balanced scale in the struggle for life, and so be
pre- served.
preserved.
How fleeting are the wishes and efforts of man! how short his time! and consequently how poor will his products be, compared with those accumulated by
nature
Nature
during whole geological
periods.
periods!
Can we wonder, then, that
nature's
Natures
Nature's
productions should be far "truer" in character than
mans
man's
productions; that they should be infinitely better adapted to the most complex conditions of life, and should plainly bear the stamp of far higher workmanship?
It may
be
metaphorically be
said that natural selection is daily and hourly scrutinising, throughout the world, every variation, even the
slightest
slightest;
rejecting that which is bad, preserving and adding up all that
are
is
good; silently and insensibly working,
whenever
whenever
and
and
wherever
wherever
opportunity
opportunity
offers ,
offers,
at the improvement of each organic being in relation to its organic and
in organic
inorganic
conditions of life. We see nothing of these slow changes in progress, until the hand of time has marked the
long
long
lapse of ages, and then so imperfect is our view into
long-past
long past
geological ages, that we
see only
only see
that the forms of life are now different from what they formerly were.