Algorismus ; Tractatum de sphaera
1225
Kislak Center for Special Collections, Rare Books and Manuscripts, LJS 26. Italy, 1225. Treatise on the fundamentals of arithmetic (Algorismus), followed by a treatise on cosmography that describes and illustrates the Ptolemaic model of a spherical earth divided into climactic zones at the center of the concentric spheres of the universe. The second treatise has marginal notes in the same ink and possibly hand as the text, as well as notes in a later cursive hand in faint ink and a bifolium written in this later hand bound in (f. 23-24). Penn Libraries Catalog: go to Find
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Algorismus ; Tractatum de sphaera
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Sacro Bosco, Joannes de, active 1230. Algorismus ; Tractatum de sphaera. Lex, lex-books.com/book/algorismus-tractatum-de-sphaera-78ad48bd-595c-47ec-9fbd-e1d4d7235024.APA
Sacro Bosco, J. D. (1225). Algorismus ; Tractatum de sphaera. Lex. https://lex-books.com/book/algorismus-tractatum-de-sphaera-78ad48bd-595c-47ec-9fbd-e1d4d7235024Chicago
Sacro Bosco, Joannes de, active 1230. Algorismus ; Tractatum de sphaera. Lex. https://lex-books.com/book/algorismus-tractatum-de-sphaera-78ad48bd-595c-47ec-9fbd-e1d4d7235024.
