I was all the more attracted to
it, from not being at all satisfied with the explanation which
Henslow gave us in his lectures, about twining plants, namely,
that they had a natural tendency to grow up in a spire. This
explanation proved quite erroneous. Some of the adaptations
displayed by Climbing Plants are as beautiful as those of Orchids
for ensuring cross-fertilisation.
My 'Variation of Animals and Plants under Domestication' was
begun, as already stated, in the beginning of 1860, but was not
published until the beginning of 1868. It was a big book, and
cost me four years and two months' hard labour. It gives all my
observations and an immense number of facts collected from
various sources, about our domestic productions. In the second
volume the causes and laws of variation, inheritance, etc., are
discussed as far as our present state of knowledge permits.
Towards the end of the work I give my well-abused hypothesis of
Pangenesis. An unverified hypothesis is of little or no value;
but if anyone should hereafter be led to make observations by
which some such hypothesis could be established, I shall have
done good service, as an astonishing number of isolated facts can
be thus connected together and rendered intelligible. In 1875 a
second and largely corrected edition, which cost me a good deal
of labour, was brought out.
My 'Descent of Man' was published in February, 1871.
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