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On the other hand, this observation plainly proves two things: first, that the above mentioned doctrine of Koelliker, now held by Korschinsky is a move in the right direction for the discovery of the causes of descent; and secondly, that the principal cause of the evolution is not to be sought in environment and blind forces but in the systematically working, internal vital principle in plants and animals.
As far as the question of the right to interpret nature teleologically is concerned, it would be entirely indifferent whether what Korschinsky calls “the tendency to progress,” and the system of laws in obedience to which evolution brings forth its forms, can be interpreted “mechanically” or not; that is to say, whether or not evolution depends on conditions and potentialities of living matter, which can be demonstrated and made mechanically commensurable or not.
The new views that have thus arisen have been definitely summarised and clearly contrasted with Darwinism by the botanist Korschinsky. He died before completing his general work, “Heterogenesis und Evolution,” but he has elsewhere given an excellent summary of his results, which we append in abstract. DARWIN. Everything organic is capable of variation.
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.
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.
The principles of the new school are very widespread to-day, but we cannot here follow their development in the works of individual investigators, such as Reinke, R. Hertwig, O. Hertwig, Wiesner, Hamann, Dreyer, Wolff, Goette, Kassowitz, v. Wettstein, Korschinsky, and others. The Spontaneous Activity of the Organism.
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