Note 22 — Chapter XII

Darwin’s theory has of recent years been disproved by men of science, such as Professor Dr. von Wettstein, Warning, Henslow, and others. Only in certain instances can Darwin’s theory be accepted; but it has been discovered recently that the new formation of species among plants and animals is possible in different ways, and not only in the manner Darwin implies. His theory of descent, which was firmly believed in by men of science in the sixties and seventies of the last century, is now pronounced to be a theory altogether out of date, and has been superseded by those of Moriz Wagner, Karl von Nägeli, Henslow, A. von Kerner and Professor A. Weissmann. “The Origin of Plant Structures by Self-Adaptation to the Environment,” by Henslow, published in 1895, and Warning’s “Geography of Plants,” published in the following year, are well-known English books on this subject which may be recommended to those interested in it.