Article ID: CBB219801916

Johannes Fontana als Verfasser der Speculi almukefi compositio und sein Exkurs über den Stahl (ca. 1430) (2016)


The anonymously transmitted Speculi almukefi compositio is one of the most original works that the Middle Ages brought out on conic sections and construction of parabolic mirrors. The author is suspected to have been an unknown monk of the 13th/14th century. Based on source documents that were previously left unconsidered, this article assigns the tract to the Venetian Johannes Fontana. The diversely interested doctor of arts and medicine practiced as a physician in Udine in the 1430s, a time during which he wrote about geometric subjects. The close relationship to practical application is typical for the scientist Fontana. It is expressed in an excursion on the conditions of a good steel. The rich text, still to be evaluated from a technical-historical point of view, is published here in a German translation for the first time.

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Authors & Contributors
Lohrmann, Dietrich
Yoav Meyrav
Käs, Fabian
Ghalandari, Hanif
Van Helden, Albert
Totelin, Laurence M. V.
Sudhoffs Archiv: Zeitschrift fuer Wissenschaftsgeschichte
Aleph: Historical Studies in Science and Judaism
Early Science and Medicine: A Journal for the Study of Science, Technology and Medicine in the Pre-modern Period
Social History of Medicine
Written Heritage Research Institute (Miras-e Maktoob)
Springer International Publishing
Walter de Gruyter
University of Chicago Press
Les Belles Lettres
Primary literature (historical sources)
Conic sections
Fontana, Giovanni
Apollonius, of Perga
Kharaqī, ʻAbd al-Jabbār ibn ʻAbd al-Jabbār
Ibn Ezra, Abraham Ben Meir
Abraham Ben Ezra
Time Periods
15th century
14th century
13th century
Venice (Italy)

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