etermine the extent of the individual stages of Darwinism, this
would be my answer:

1. The incipient stage extends from 1859 (the year during which
Darwin's principal work, _The Origin of Species_, appeared) to the
end of the sixties.

2. The stage of growth: from that time, for about 20 years, to the end
of the eighties.

3. The stage of decay: from that time on to about the year 1900.

4. The final stage: the first decade of the new century.

I am not by choice a prophet, least of all regarding the weather. But I
think it may not be doubted that the fine weather, at least, has passed
for Darwinism. So having carefully scanned the firmament of science for
signs of the weather, I shall for once make a forecast for Darwinism,
namely: Increasing cloudiness with heavy precipitations, indications of
a violent storm, which threatens to cause the props of the structure to
totter, and to sweep it from the scene.

CHAPTER III.

As further witnesses to the passing of Darwinism, two botanists may be
cited; the first is Professor Korschinsky who in No. 24, 1899, of the
_Naturwissenschaftliche Wochenschrift_ published an article on
"Heterogenesis and Evolution," which was to be followed later by a
large work on this subject. With precision and emphasis he points to
the numerous instances in which there occurs on or in a plant, suddenly
and without intervention, a variation which may become hereditary under
certain circumstances; thus during the last century a number of
varieties of garden plants have been evolved. On the basis of such
experiments Korschinsky developed the theory which had been proposed by
Koelliker in Wuerzburg thirty years earlier, namely, the theory of
"heterogeneous production" or "heterogenesis," as Korschinsky calls it.
When one understands that a plant gives rise suddenly and without any
intervention to a grain of seed, which produces a different plant, it
becomes evident that all Darwinistic speculations about selection and
struggle for existence are forthwith absolutely excluded. The effect
can proceed only from the internal vital powers inherent in the
specified organism acting in connection, perhaps, with the internal
conditions of life, which suddenly exert an influence in a new
direction.

Korschinsky distinguishes clearly and definitely between the principles
of Heterogenesis and Transmutation (gradual transformation through
natural selection in the struggle for existence), and in so