new vessels are formed. Mules partake of
the forms of both parents. Hair and nails grow by elongation, not by
distention._ 3. _Organic particles of Buffon._ IV. 1. _Rudiment of the
embryon a simple living filament, becomes a living ring, and then a
living tube._ 2. _It acquires irritabilities, and sensibilities with
new organizations, as in wounded snails, polypi, moths, gnats,
tadpoles. Hence new parts are acquired by addition not by distention._
3. _All parts of the body grow if not confined._ 4. _Fetuses deficient
at their extremities, or have a duplicature of parts. Monstrous births.
Double parts of vegetables._ 5. _Mules cannot be formed by distention
of the seminal ens._ 6. _Families of animals from a mixture of their
orders. Mules imperfect._ 7. _Animal appetency like chemical affinity.
Vis fabricatrix and medicatrix of nature._ 8. _The changes of animals
before and after nativity. Similarity of their structure. Changes in
them from lust, hunger, and danger. All warm-blooded animals derived
from one living filament. Cold-blooded animals, insects, worms,
vegetables, derived also from one living filament. Male animals have
teats. Male pigeon gives milk. The world itself generated. The cause of
causes. A state of probation and responsibility._ V. 1. _Efficient
cause of the colours of birds eggs, and of hair and feathers, which
become white in snowy countries. Imagination of the female colours the
egg. Ideas or motions of the retina imitated by the extremities of the
nerves of touch, or rete mucosum._ 2. _Nutriment supplied by the female
of three kinds. Her imagination can only affect the first kind. Mules
how produced, and mulattoes. Organs of reproduction why deficient in
mules. Eggs with double yolks._ VI. 1. _Various secretions produced by
the extremities of the vessels, as in the glands. Contagious matter.
Many glands affected by pleasurable ideas, as those which secrete the
semen._ 2. _Snails and worms are hermaphrodite, yet cannot impregnate
themselves. Final cause of this._ 3. _The imagination of the male forms
the sex. Ideas, or motions of the nerves of vision or of touch, are
imitated by the ultimate extremities of the glands of the testes, which
mark the sex. This effect of the imagination belongs only to the male.
The sex of the embryon is not owing to accident._ 4. _Causes of th