Johannes de Sacrobosco

Editions of the 
Tractatus de Sphaera
Sacrobosco Project
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Sphaera Ioannis de Sacrobvsto. Addita sunt quædam ad explanationem eorum, quæ in Sphæra dicuntur facientia.
Venetiis: per Petrum de Nicolinis de Sabio, expensis Melchioris Sensæ, 1550. 

32 leaves, illus. 16 cm. (8vo.)

"De Qvibvsdam Pricipiis Geometricis Svpponendis Qvæ Svnt Addita," leaf 2-7a
"Propositio. XXII. Ex Libro Tertio Epitomae Io. Regiomonte in Almagestum Ptolemæi," leaf 32.
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Locations: New York Public Library – Humanities-Rare Bks & Mss - *KB 1550 
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Johannes de Sacrobosco - Editions of the Tractatus de Sphaera - home
Roberto de Andrade Martins - roberto.andrade.martins@gmail.com
Group of History, Theory of Science and Science Teaching, University of São Paulo (USP), Brazil - GHTC