ArticleTheory in biosciences = Theorie in den Biowissenschaften2021
Scientific traditions in conflict: the Rusconi-von Baer controversy on the embryology of frogs and the development of the cell theory.
Article in Theory in biosciences = Theorie in den Biowissenschaften, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
In 1835, the meaning of the cleavage furrows in the division of frog eggs was the cause of a heated argument between the Italian naturalist Mauro Rusconi and Karl Ernst von Baer. These furrows were first described by Prévost and Dumas (Ann Sci Nat 2:100-121, 129-149, 1824b) who did not realize they cut the egg into separate masses. Rusconi (Développement de la grenouille comune depuis le moment de sa naissance jusque a son état parfait, Giusti, Milano, 1826) hypothesized a connection between the furrows and a peculiar crystallization of the content of the egg which eventually produced elementary molecules as the building blocks of the embryo. von Baer (Arch Anat Phys Wiss Med 6:481-509, 1834) was the first to establish a link between the furrows and an active process of dichotomous division he considered to be the basis for all further development and differentiation. The present paper analyses the theoretical reasons behind these divergent interpretations and focuses attention on their implications for the development of the cell theory and the conceptions of life. Prévost, Dumas and Rusconi interpreted cleavage and the whole embryonic development in the light of eighteenth-century scientific theories and the French materialism of the early nineteenth century, which explained life in terms of ordered molecular movement. Starting from other premises partly rooted in German philosophy von Baer (1834) gave a totally different picture which anticipated the cell theory and modern embryology.
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