Origin of Species Variorum

→ I can see no reason to doubt that 1859 1860 1861 1866

OMIT 1869 1872

→ their native countries. 1859 1860 1861 1866

any country which they inhabited. 1869 1872

→ by 1859 1860 1861

in England by 1866 1869 1872

→ advanced— 1859 1860 1861

advanced — 1866 1869

advanced, as proving that acclimatisation cannot be effected, 1872

→ was— as proving that acclimatisation cannot be effected! 1859 1860 1861

was — as proving that acclimatisation cannot be effected! 1866 1869

was! 1872

→ appeared to be 1859 1860 1861

were 1866 1869

are 1872

→ others. 1859 1860 1861

others; and of this fact I have myself observed a striking instance. 1866

others; and of this fact I have myself observed striking instances. 1869 1872

transporting

transposing

animals from one district to

another.

another;

And as

for

as it

is not likely that man should have succeeded in selecting so many breeds and sub-breeds with constitutions specially fitted for their own

districts,

districts:

the result must, I think, be due to habit. On the other

hand

hand,

→I can see no reason to doubt that natural

selec- tion

selection

would inevitably

will continually

tend to preserve those individuals which

were

are

born with constitutions best adapted to →their native countries. In treatises on many kinds of cultivated plants, certain varieties are said to withstand certain climates better than

others;

others:

this is

~~very~~

very

strikingly shown in works on

fruit-trees

fruit trees

published in the United States, in which certain varieties are habitually recommended for the

northern

northern,

and others for the southern

states;

States;

and as most of these varieties are of recent origin, they cannot owe their constitutional differences to habit. The case of the Jerusalem artichoke, which is never propagated →by seed, and of which consequently new varieties have not been produced, has even been →advanced— for it is now as tender as ever it →was— as proving that acclimatisation cannot be effected! The

case

case,

also, of the kidney-bean has been often cited for a similar purpose, and with much greater weight; but until some one will sow, during a score of generations, his kidney-beans so early that a very large proportion

I are

are

destroyed by frost, and then collect seed from the few survivors, with care to prevent accidental crosses, and then again get seed from these seedlings, with the same precautions, the experiment cannot be said to have been

~~even~~

even

tried. Nor let it be supposed that

differences in the constitution of seedling kidney-beans

never

ever

appear, for an account has been published how much more hardy some seedlings →appeared to be than →others.

On the whole,

~~I think~~

I think

we may conclude that habit,