See page in:
1859
1860
1861
1866
1869
1872

Compare with:
1859
1860
1861
1869
1872

OMIT 1861 1866
from light, and 1859 1860

Effects of Habit; Correlation of Growth; Inheritance. 1866
Effects of Habit; Correlated Variation; Inheritance. 1869
Effects of Habit and of the Use or Disuse of Parts; Correlated Variation; Inheritance. 1872

Habit also has a decided influence, 1859 1860 1861 1866
Habits are inherited and have a decided influence; 1869
Changed habits produce an inherited effect, 1872

flowering with 1859 1860 1861 1866
the flowering of 1869 1872

it has 1859 1860 1861 1866
they have 1869
the increased use or disuse of parts has had 1872

effect; for instance, 1859 1860 1861 1866 1869
influence; thus 1872

I presume that 1859 1860 1861 1866
OMIT 1869 1872

the state of 1859 1860 1861 1866 1869
OMIT 1872

a single 1859 1860 1861 1866
one of our 1869 1872

which has been suggested 1866 1869 1872
suggested by some authors, 1859 1860 1861

seldom alarmed by danger, 1866 1869
much alarmed by danger, 1859 1860 1861
seldom much alarmed, 1872

produce similar changes of structure. Nevertheless some slight amount of change may, I think, be attributed to the direct action of the conditions of life — as, in some cases, increased size from amount of food, colour from particular kinds of
food
food,
or
and
OMIT perhaps the thickness of fur from climate.
Effects of Habit; Correlation of Growth; Inheritance.
Habit also has a decided influence, as in the period of flowering with plants when transported from one climate to another.
With
In
animals it has a more marked effect; for instance, I find in the domestic duck that the bones of the wing weigh less and the bones of the leg more, in proportion to the whole skeleton, than do the same bones in the wild-duck; and I presume that this change may be safely attributed to the domestic duck flying much less, and walking more, than its wild
parents.
parent.
The great and inherited development of the udders in cows and goats in countries where they are habitually milked, in comparison with the state of these organs in other countries, is
another
probably another
instance of the
effect
effects
of use. Not a single domestic
animals
animal
can be named which has not in some country drooping ears; and the view which has been suggested that the drooping is due to the disuse of the muscles of the ear, from the animals
not
....
being seldom alarmed by danger, seems probable.
There are
There are
Many
many
laws
regulate
regulating
variation, some few of which can be dimly seen, and will
hereafter be
be hereafter
briefly
discussed.
mentioned.
I will here only allude to what may be called
correlated
correlation
variation.
of growth.
Important
Any
changes
change
in the embryo or larva will
almost certainly
probably
entail changes in the mature animal. In monstrosities, the correlations between quite distinct parts are very curious; and many instances are given in Isidore Geoffroy St. Hilaire's great work