De sphaeraSacro Bosco, Joannes de, fl. 1230[ca. 1400?]gmhManuscript on paper of Konrad von Megenberg (1309-1374), Die deutsche Sphaera, an adaptation in German of Iohannes de Sacrobosco, De sphaera. With 23 verses dealing with the numerical value of the letters of the alphabet, excerpted from Hugutio of Pisa (d. 1212), Liber derivationumIn German.Script: Copied by one hand in Gothica Cursiva Libraria/Currens.The initials are not executed. Coarsely drawn diagrams; the principal ones are on ff. 2r (Earth in the middle of the circles of the elements, the planets and the heavens), 9v (a quadripartite circular map of the world, three quarters covered with sea and inhabited by fish), 10v (a circular diagram and another with "cauda Draconis" and "caput Draconis"), 11r (two diagrams showing eclipses), 11v (related diagrams).Binding: Yellow limp vellum too large for the present manuscript.