'
"There is no doubt, however, that these experiments demand careful
consideration, but before they can claim scientific recognition,
they must be subjected to rigid criticism as to the precautions
taken, the nature and number of the control experiments, etc.
"Up to the present time such necessary conditions have not been
sufficiently observed. The recent experiments themselves are only
described in short preliminary notices, which, as regards their
accuracy, the possibility of mistake, the precautions taken, and the
exact succession of individuals affected, afford no data on which a
scientific opinion can be founded" (pp. 81, 82).
The line Professor Weismann takes, therefore, is to discredit the
facts; yet on a later page we find that the experiments have since
been repeated by Obersteiner, "who has described them in a very
exact and unprejudiced manner," and that "the fact"--(I imagine that
Professor Weismann intends "the facts")--"cannot be doubted."
On a still later page, however, we read:--
"If, for instance, it could be shown that artificial mutilation
spontaneously reappears in the offspring with sufficient frequency
to exclude all possibilities of chance, then such proof [i.
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