39 “Die Darwinsehe Theorie. Gemeinverständliche Vorlesungen über die Naturphilosophie der Gegenwart gehalten vor Studierenden aller Fakultäten,” Leipzig, 1903. This book is the continuation of the author’s “Deszendenztheorie.” 40 Fleischmann’s book compares favourably with those of other naturalists, in that he does not contrast “Moses” and natural science, as is customary, but has a deeper knowledge of the modern view of Genesis I. than is usually found among naturalists, whether of the “positive” or “negative” standpoint. 41 See also Wolff. 42 See C.C. Coe, “Nature versus Natural Selection,” London, 1895. Perhaps the most comprehensive, many-sided, critical analysis of the theory of natural selection. See also Herbert Spencer, “The Inadequacy of Natural Selection,” 1893. 43 Leipzig, 1888, 1897, 1901. In part translated as “Organic Evolution.” We are here mainly concerned with Vols. I. and III. Later on we shall have to discuss Vol. II. 44 Wien, 1899. 45 See Wettstein, “Neolamarckism,” Jena, 1902. See also Demoor, Massart, Vandervelde, “L’Evolution régressive en Biologie et Sociologie,” Paris, 1897. Bibliothèque scientific internationale, vol. lxxxv. This work is on the Lamarckian basis. It is original in applying Lamarckian principles to a theory of society. 46 Two vols., Leipzig, 1901 and 1902. 47 It remains open to question whether Eimer’s explanation is sufficient in all cases, even those of the exaggeratedly deceptive copies of leaves or bark, or the colour of the environment. It is certainly not the sorry explanation in terms of “Variation and Selection,” but that of a spontaneous imitation of the surroundings, that forces itself irresistibly upon us in this connection. 48 Jena, 1892 and 1895. 49 See Reinke, “Einleitung in die theoretische Biologie,” 1901, especially pp. 463 onwards on “Phylogenetisches Bildungspotential.” von Wettstein (On direct adaptation), “Neolamarkismus,” Jena, 1902. _Cf._ “Wissensch-Beiträge zum 15 Jahresberichte (1902) der Philos. Gesellschaft an der Universität zu Wien: Vorträge und Besprechungen über die Krisis der Darwinismus.” M. Kassowitz, “Allgemeine Biologie,” I. and II., 1899. O. Hertwig, “Entwicklung der Biologie im 19. Jahrhundert.” Wiesner, “Elemente der wissenschaftlichen Botanik.” (_cf._ especially III. “Biologie der Pflanzen”), and on p. 288 the summary of propositions which are very similar to those formulated later by Korschinsky. (“Auf Grund des den Organismen innewohnenden Vervollkommnungstriebes.”) 50 See the particularly beautiful and suggestive experiments of Haberlandt: “Experimentelle Hervorrufung eines neuen Organs.” In “Festschrift für Schwendener,” Berlin Borntraeger, 1899. 51 See “Nature,” 1891, p. 441