The only reason they have been in opposition is because some
of the workers did not clearly understand the nature of their work. With
the dissemination of a knowledge of biology, this ground of antagonism
will disappear.
APPENDIX A
OVARIAN TRANSPLANTATION
In 1890, W. Heape published an account of some experiments with rabbits.
Taking the fertilized egg of an angora rabbit (i. e., a long-haired,
white one) from the oviduct of its mother previous to its attachment to
the wall of the uterus, he transferred it to the uterus of a Belgian
hare, a rabbit which is short-haired and gray. The egg developed
normally in the new body and produced an animal with all the
characteristics, as far as could be seen, of the real mother, rather
than the foster-mother. Its coat was long and white, and there was not
the slightest trace of influence of the short, gray-haired doe in whose
body it had grown.
Here was a case in which environment certainly failed to show any
modifying influence. But it was objected that the transplanted egg was
already full-grown and fertilized when the transfer was made, and that
therefore no modification need be expected. If the egg were transferred
at an earlier stage, it was thought, the result might be different.
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