First Edition, Volume II., Page 339.
Second Edition Volume II., Page 333.
On Geoffroy St.-Hilaire's law of "soi pour soi."

First Edition, Volume II., Page 357 to 404.
Second Edition Volume II., Page 349 to 399.
The chapter on Pangenesis has been largely altered and re-modelled; but the
essential principles remain the same.



THE VARIATION OF ANIMALS AND PLANTS UNDER DOMESTICATION.


INTRODUCTION.

The object of this work is not to describe all the many races of animals
which have been domesticated by man, and of the plants which have been
cultivated by him; even if I possessed the requisite knowledge, so gigantic
an undertaking would be here superfluous. It is my intention to give under
the head of each species only such facts as I have been able to collect or
observe, showing the amount and nature of the changes which animals and
plants have undergone whilst under man's dominion, or which bear on the
general principles of variation. In one case alone, namely in that of the
domestic pigeon, I will describe fully all the chief races, their history,
the amount and nature of their differences, and the probable steps by which
they have been formed. I have selected this case, because, as we shall
hereafter see, the materials are better than in any other; and one case
fully described will in fact illustrate all others. But I shall also
describe domesticated rabbits, fowls, and ducks, with considerable fulness.