Origin of Species Variorum

→ correlated in some necessary manner. 1859 1860 1861 1866 1869

in some necessary manner correlated. 1872

↑ 1 blocks not present in 1859 1860 1861 1866; present in 1869 1872

Some correlations are apparently due to the manner in which natural selection acts.

→ some 1861 1866

I do not doubt that some apparent 1859 1860

→ fact that seeds could not gradually become 1859 1860 1861 1866

impossibility of seeds gradually becoming 1869 1872

→ except in fruits which opened; so that the individual plants producing 1859 1860 1861 1866

unless the capsules first opened themselves; for in this case alone could the 1869

unless the capsules were open: for in this case alone could the 1872

→ further, might get 1859 1860 1861 1866

by the wind, gain 1869 1872

→ those producing seed less 1859 1860 1861 1866

those less well 1869

others less well 1872

→ dispersal; and this process could not possibly go on in fruit which did not open. 1859 1860 1861 1866

wide dispersal. 1869 1872

structures which are common to whole groups of species, and which in truth are simply due to inheritance; for an ancient progenitor may have acquired through natural selection some one modification in structure, and, after thousands of generations, some other and independent modification; and these two modifications, having been transmitted to a whole group of descendants with diverse habits, would naturally be thought to be →correlated in some necessary manner. ↑ So, again, →some correlations, occurring throughout whole orders, are

entirely

apparently

due to the manner alone in which natural selection can act. For instance, Alph.

Candolle has remarked that winged seeds are never found in fruits which do not

open;

open:

I should explain

this

the

rule by the →fact that seeds could not gradually become winged through natural selection, →except in fruits which opened; so that the individual plants producing

seeds,

seeds

which were a little better

adapted

fitted

to be wafted →further, might get an advantage over →those producing seed less fitted for →dispersal; and this process could not possibly go on in fruit which did not open.

Compensation and Economy of

Growth .

The elder Geoffroy and Goethe propounded, at about the same

time

period,

their law of compensation or balancement of growth; or, as Goethe expressed it, "in order to spend on one side, nature is forced to economise on the other side." I think this holds true to a certain extent with our domestic productions: if nourishment flows to one part or organ in excess, it rarely flows, at least in excess, to another part; thus it is difficult to get a cow to give much milk and to fatten readily. The same varieties of the cabbage do not yield abundant and nutritious foliage and a copious supply of oil-bearing seeds. When the seeds in our fruits become atrophied, the fruit itself