Is it Possible to Experiment with Thought? Ernst Mach’s Notion of Thought Experiment and its Pedagogical Context around 1900. The article tries to establish the crucial importance of the pedagogical dimension of Ernst Mach’s ideas on experimenting with thought. The focus on contemporary pedagogics demonstrates, first, that Mach’s didactic approach to physics is part of a much broader stream of pedagogical writings that transcends national and disciplinary borders and comprises a diversity of authors, e.g. Wilhelm Jerusalem, William James or Alfred (...) N. Whitehead; second, that the much‐heralded controversy between Mach and the French philosopher of science Pierre Duhem about thought experiments does not only revolve around epistemological issues but rather stems from their antagonist vision of teaching physics; and finally, third, that G. Stanley Hall’s psychogenetic theory of pedagogics bears a strong resemblance with the evolutionary naturalism of Machian epistemology and helps explaining key tenets of Mach’s conception of thought experiment. By establishing a broad convergence between the work of all these authors despite their different academic upbringing, background and nationality the article argues for a complex and historically fine‐grained vision of the relations between natural, social and human sciences going beyond dichotomies like ‘Erklären’ and ‘Verstehen’ or the ‘Two Cultures’. (shrink)

This article analyses three basic concepts of Ludwik Fleck’s Genesis and Development of a Scientific Fact. It shows first that Fleck’s notion of „directed perception“ is closely linked to Jakob von Uexküll’s writings on the „Umwelt“ of animals and humans. The article then proposes to regard the epistemological debates surrounding parapsychology as an important testing ground for the Fleckian concept of „mood“ and his concomitant hypotheses about „the tenacity of systems of opinion and the harmony of illusions“. It finally argues (...) that Fleck’s modification of Wilhelm Jerusalem’s idea of the „social consolidation“ of knowledge helps us to understand the indebtedness of Fleck towards early functionalist sociology as well as his strong belief in „specific historical laws governing the development of ideas“. The historical semantics of Fleck’s works hence proves that his insights are neither marginal nor revolutionary but rather deeply rooted within scientific traditions from the late 19th and early 20th centuries. (shrink)

This article proposes to analyze the idea of organism and other closely related ideas using a combination of semantic fields analysis from conceptual history and the notion of boundary objects from the sociology of scientific knowledge. By tackling a wide range of source material, the article charts the nomadic existence of organism and opens up new vistas for an integrated history of the natural and human sciences. First, the boundaries are less clear-cut between disciplines like biology and sociology than previously (...) believed. Second, a long and transdisciplinary tradition of talking about organismic and societal systems in highly functionalist terms comes into view. Third, the approach shows that conceptions of a world society in Niklas Luhmann's variant are not semantic innovations of the late twentieth century. Rather, their history can be traced back to organicist sociology and its forgotten pioneers, especially Albert Schäffle or Guillaume de Greef, during the last decades of the nineteenth century. (shrink)