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Ultraviolet radiation is generally considered to have been discovered by Johann Wilhelm Ritter in 1801. In this article, we study the reception of Ritter’s experiment during the first decade after the event—Ritter’s remaining lifetime. Drawing on the attributional model of discovery, we are interested in whether the German physicists and chemists granted Ritter’s observation the status of a discovery and, if so, of what. Two things are remarkable concerning the early reception, and both have (...) to do more with neglect than with reception. Firstly, Ritter’s observation was sometimes accepted as a fact but, with the exception of C. J. B. Karsten’s theory of invisible light, it played almost no role in the lively debate about the nature of heat and light. We argue that it was the prevalent discourse based on the metaphysics of Stoffe that prevented a broader reception of Ritter’s invisible rays, not the fact that Ritter himself made his findings a part of his Naturphilosophie. Secondly, with the exception of C. E. Wünsch’s experiments on the visual spectrum, there was no experimental examination of the experiment. We argue that theorizing about ontological systems was more common than experimenting, because, given its social and institutional situation, this was the appropriate way of contributing to physics. Consequently, it was less clear in 1810 than in 1801 what, if anything, had been discovered by Ritter.Keywords: Johann Wilhelm Ritter; Carl Johann Bernhard Karsten; Christian Ernst Wünsch; Ultraviolet radiation; Conceptions of heat and light. (shrink)

The theories of reproduction that emerged at the end of the eighteenth century exhibited a range in experimental thinking about concepts of gender and sexuality. This essay focuses on the work of a writer who proposed an unusual alternative to polarity-based ideas of reproduction. Johann Wilhelm Ritter was a physicist and friend to the German Romantics and someone whose writing also shares many interests with German Naturphilosophie. The essay discusses how, inspired by ideas from the alchemical tradition, (...) Ritter challenged conventional thinking about reproduction in two significant ways: by linking it to the idea of rotation, and by using the figure of the androgyne to understand reproductive models in terms of triads, rather than oppositional pairings. A further objective of this essay is to consider which aspects of the alchemical tradition proved the most useful for Ritter’s experimental thinking and to show how he integrated them with reflections on contemporary scientific developments around 1800. (shrink)

This edition of previously unpublished correspondence from the archive of the New York Union Theological Seminary between young Charles Augustus Briggs and his teacher Isaak August Dorner dates from the second half of the 19th century. It offers insight into the transnational idea flow and interconfessional exchange on the understanding of theology. It is supplemented by letters from August Dorner jun. to Charles Briggs and two letters of recommendation that illustrate the density of the enticing web of intellectual relationships.

Dieses von Hegel als Leitfaden für die Hörer seiner Vorlesungen konzipierte Werk bietet einen programmatischen Aufriß seines gesamten philosophischen Systems. Es umfaßt die drei Teile: Wissenschaft der Logik, Philosophie der Natur und Philosophie des Geistes. Die 8., um ein Literaturverzeichnis erweiterte Auflage bietet den durchgesehenen Text der 6., nach der Originalausgabe neu herausgegebenen Text mit Anmerkungen von F. Nicolin und O. Pöggeler. Beigegeben sind eine Einleitung, Literaturverzeichnis und Personen- und Sachregister.

Bd. 1. 1785-1812 -- Bd. 2. 1813-1822 -- Bd. 3. 1823-1831 -- Bd. 4, T. 1. Dokumente und Matialien zur Biographie -- Bd. 4, T. 2. Nachträge zum Briefwechsel, Register mit biographischem Kommentar, Zeittafel.

Vorwort.--Die texte: A. Aus der Stuttgarter gymnasialzeit. B. Aus der Tübingen studienzeit. C. Aus der Berner hauslehrerzeit. E. Aus der Jenenser dozentenzeit. F. Gedichte von 1790-1801.--Anmerkungen.