GB 0103 MS LAT 15
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14th century
Fourteenth-century manuscript volume containing Johannes De Sacro Bosco's tract 'De Sphera' (ff 2-10) and other tracts, including mathematical and astrological subjects, among them 'Tractatus algorismi' (ff 11-16). The text is accompanied by diagrams in red or red and black. The volume bears on the back: 'Liber Astro/logic / M.S.' Entries on folio 1r are dated 1340 and (in an inscription of Iacobus Vannis) 1383.
Sacro Bosco , Johannes , De , d 1244 or 1256 , also known as John of Holywood or Halifax , mathematician and astronomer