See page in:
1859
1860
1861
1866
1869
1872

Compare with:
1859
1861
1866
1869
1872

1 blocks not present in 1859 1860 1861 1866 1869; present in 1872
Breeders of cattle wish the flesh and fat to be well marbled together: an animal thus characterised has been slaughtered, but the breeder has gone with confidence to the same stock and has succeeded.

a well-flavoured vegetable is cooked, and the individual is destroyed; 1859 1860 1861
breeders of cattle wish the flesh and fat to be well marbled together; the animal has been slaughtered, 1866 1869

horticulturist sows seeds of 1859 1860 1861
breeder has gone with confidence to 1866 1869

confidently expects to get nearly the same variety: breeders of cattle wish the flesh and fat to be well marbled together; the animal has been slaughtered, but the breeder goes with confidence to the same family. 1860
confidently expects to get nearly the same variety; breeders of cattle wish the flesh and fat to be well marbled together; the animal has been slaughtered, but the breeder goes with confidence to the same family. 1859
confidently expects to get nearly the same variety: breeders of cattle wish the flesh and fat to be well marbled together; the animal has been slaughtered, but the breeder goes with confidence to the same stock. 1861
has succeeded. 1866 1869

in 1859 1860 1861
may be placed in 1866 1869 1872

I do not doubt that 1859 1860 1861
probably 1866 1869
OMIT 1872

be slowly 1859 1860 1861 1866 1869
it is probable, be 1872

Thus I believe it has been with social insects: a 1859 1860 1861 1866 1869
Hence we may conclude that 1872

has been advantageous to the community: 1859 1860 1861 1866 1869
have proved advantageous: 1872

of the same community 1859 1860 1861 1866 1869
have 1872

And I believe that 1859 1860 1861 1866 1869
OMIT 1872

until 1859 1860 1861 1866 1869
many times, until 1872

desired end. Thus, a well-flavoured vegetable is cooked, and the individual is destroyed; but the horticulturist sows seeds of the same
family,
stock
stock,
and confidently expects to get nearly the same variety: breeders of cattle wish the flesh and fat to be well marbled together; the animal has been slaughtered, but the breeder goes with confidence to the same family.
I have
I have
Such
such
faith in the
power
powers
of selection, that I do not doubt that a breed of cattle, always yielding oxen with extraordinarily long horns,
could,
could
be slowly formed by carefully watching which individual bulls and cows, when matched, produced oxen with the longest horns; and yet no one ox
would
could
ever have propagated its kind. Thus I believe it has been with social insects: a slight
modifications
modification
of
structure
structure,
or
of instinct,
instinct,
correlated with the sterile condition of certain members of the community, has been advantageous to the community: consequently the fertile males and females of the same community flourished, and transmitted to their fertile offspring a tendency to produce sterile members
with
having
the same
modifications.
modification.
And I believe that
This
this
process
must have
has
been
repeated
repeated,
until that prodigious amount of difference between the fertile and sterile females of the same species has been produced, which we see in
so many
many
social insects.
But we have not as yet touched on the climax of the difficulty; namely, the fact that the neuters of several ants differ, not only from the fertile females and males, but from each other, sometimes to an almost incredible degree, and are thus divided into two or even three castes. The castes, moreover, do not
commonly
generally
graduate into each other, but are perfectly well defined; being as distinct from each
other
other,
as are any two species of the same genus, or rather as any two genera of the same family. Thus in Eciton, there are working and soldier neuters, with jaws and instincts extraordinarily