| Comparison with 1869 |
|
Whatever the cause may be of each slight difference
between | between 1869 1872 | | in 1859 1860 1861 1866 |
the offspring
and | and 1869 1872 | | from 1859 1860 1861 1866 |
their
parents — | parents — 1866 1869 | | parents— 1859 1860 1861 1872 |
and a cause for each must
exist — | exist — 1866 1869 | | exist— 1859 1860 1861 1872 |
it
is the steady accumulation,
through natural selection, of beneficial differences that has | through natural selection, of beneficial differences that has 1869 |
| through natural selection, of such differences, when beneficial to the individual, that 1859 1860 1861 1866 |
| of beneficial differences which has 1872 |
given | given 1869 1872 | | gives 1859 1860 1861 1866 |
rise to all
those | those 1869 |
| the more important 1859 1860 1861 1866 1872 |
modifications of
structure | structure 1869 1872 | | structure, 1859 1860 1861 1866 |
which are the most important for the welfare of each species. | which are the most important for the welfare of each species. 1869 |
| by which the innumerable beings on the face of this earth are enabled to struggle with each other, and the best adapted to survive. 1859 1860 1861 1866 |
| in relation to the habits of each species. 1872 |
|
Whatever the cause may be of each slight difference
in | in 1859 1860 1861 1866 | | between 1869 1872 |
the offspring
from | from 1859 1860 1861 1866 | | and 1869 1872 |
their
parents— | parents— 1859 1860 1861 1872 | | parents — 1866 1869 |
and a cause for each must
exist— | exist— 1859 1860 1861 1872 | | exist — 1866 1869 |
it | it 1859 1860 1861 1866 1869 |
| we have reason to believe that it 1872 |
is the steady
accumulation, | accumulation, 1859 1860 1861 1866 1869 | | accumulation 1872 |
through natural selection, of such differences, when beneficial to the individual, that | through natural selection, of such differences, when beneficial to the individual, that 1859 1860 1861 1866 |
| through natural selection, of beneficial differences that has 1869 |
| of beneficial differences which has 1872 |
gives | gives 1859 1860 1861 1866 | | given 1869 1872 |
rise to all
the more important | the more important 1859 1860 1861 1866 1872 |
| those 1869 |
modifications of
structure, | structure, 1859 1860 1861 1866 | | structure 1869 1872 |
by which the innumerable beings on the face of this earth are enabled to struggle with each other, and the best adapted to survive. | by which the innumerable beings on the face of this earth are enabled to struggle with each other, and the best adapted to survive. 1859 1860 1861 1866 |
| which are the most important for the welfare of each species. 1869 |
| in relation to the habits of each species. 1872 |
|