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Gärtner schreibt diese Verschiedenheit dem Umstande zu, dass “die typische Kraft, womit eine Art bei der Zeugung zur Veränderung und Umbildung des mütterlichen Typus wirkt, bei den verschiedenen Gewächsen sehr verschieden ist, und dass folglich die Perioden, innerhalb welcher und die Anzahl von Generationen, durch welche die eine Art in die andere umgewandelt wird, auch verschieden sein müssen, und die Umwandlung bei manchen Arten durch mehr, bei anderen aber durch weniger Generationen vollbracht wird”.
Gärtner ascribes this difference to the circumstance that “the typical force with which a species acts in generation towards the alteration and transformation of the maternal type, is very different in different plants, and that consequently the periods during which, and the number of generations by which, one species is transformed into another, also have to be different, so that transformation is accomplished in some species by more, in others by fewer generations”.

Gärtner The quotation is very exact, Mendel only misses a comma after innerhalb welcher. In the library copy Mendel perused, he placed an underlined w against this paragraph, probably standing for wichtig (“important”); see Carl Friedrich Gärtner, Versuche und Beobachtungen über die Bastarderzeugung im Pflanzenreich (Stuttgart: Hering, 1849), Mendel Museum, Collection of the Augustinian Abbey, p. 463. On Gärtner, see p. 3, s. 4.

circumstance = Umstand See p. 10, s. 13.

generation = Zeugung Bateson and Sherwood have “reproduction”; see p. 3, s. 8. Gärtner is using generation in the sense of the event by which offspring is produced, and not, like Mendel, in the sense of a generational cohort; cf. fn. 11.

typical force = typische Kraft Bateson has “specific [typische] force”, Sherwood “characteristic force”. We stick with Druery’s literal translation. Gärtner’s enigmatic term is probably related to the idea of “formative drive” (Bildungstrieb or -kraft), a concept Gärtner employs as well (see, e.g., op. cit., p. 257).

different plants = den verschiedenen Gewächsen The definite article den indicates that Gärtner is speaking of plants here that do not just differ, but belong to different kinds or species.

type = Typus See p. 38, s. 6.

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