ges to destroy those that do not come up to his
pattern,--has no [knowledge] power of selecting according to internal
variations,--can hardly keep his conditions uniform,--[cannot] does not
select those best adapted to the conditions under which form > lives,
but those most useful to him. This might all be otherwise.
{44} There is an article on the _vis medicatrix_ in Brougham's
_Dissertations_, 1839, a copy of which is in the author's library.
{45} This is the classification of selection into methodical and
unconscious given in the _Origin_, Ed. i. p. 33, vi. p. 38.
{46} This passage, and a similar discussion on the power of the
Creator (p. 6), correspond to the comparison between the selective
capacities of man and nature, in the _Origin_, Ed. i. p. 83, vi. p.
102.
Sec. II.
Let us see how far above principles of variation apply to wild animals.
Wild animals vary exceedingly little--yet they are known as
individuals{47}. British Plants, in many genera number quite uncertain
of varieties and species: in shells chiefly external conditions{48}.
Primrose and cowslip. Wild animals from different [countries can be
recognized]. Specific character gives some organs as varying. Variations
analogous in kind, but less in degree with domesticated animals--chiefly
external and less important parts.
{47} i.e. they are individually distinguishable.
{48} See _Origin_, Ed. i. p. 133, vi. p. 165.
Our experience would lead us to expect that any and every one of these
organisms would vary if taken away > and placed
under new conditions. Geology proclaims a constant round of change,
bringing into play, by every possible > change of climate and the death
of pre-existing inhabitants, endless variations of new conditions. These
> generally very slow, doubtful though how far the
slowness > would produce tendency to vary. But Geolog show
change in configuration which, together with the accidents of air and
water and the means of transportal which every being possesses, must
occasionally bring, rather suddenly, organism to new conditions and >
expose it for several generations. Hence > we should expect every now
and then a wild form to vary{49}; possibly this may be cause of some
species varying more than others.
{49} When the author wrote
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