Keywords: Treatises On Natural Science, Philosophy, And Mathematics - Mensuration.jpg en Diagrams In A Volume Of Treatises On Natural Science Philosophy And Mathematics This manuscript is typical of the sort of book owned by medieval university students its contents are academic it is small and easily portable the text is written in small cursive script and with minimal decoration On a flyleaf is a partially erased inscription recording that it was given by a university graduate to an Oxford school; a later medieval inscription records its ownership by Holy Trinity collegiate church at Tattershall in Lincolnshire These diagrams illustrate the text in a treatise on Mensuration a branch of geometry that deals with the measurement of lengths areas and volumes and elementary trigonometry all involving squares whose sides are 12 units long http //www bl uk/onlinegallery/onlineex/illmanus/roymanucoll/d/011roy000012e25u00153v00 html The text on mensuration and elementary trigonometry De rerum mensuratione is found on folios 152r-155v http //jordanus org/cgi-bin/iccmsm-search pl sprache en datenbank iccmsm ausgabe dhs ausdateiformat listpos 0 listlen 35 listen keine listlet keiner fn t00b04 f03 fi London fn t00b04 f04 fi British+Museum fn t05b07 f fi Royal+12+E+XXV Royal MS 12 E xxv<br> http //www bl uk/onlinegallery/onlineex/illmanus/roymanucoll/d/011roy000012e25u00153v00 html unknown medieval authors 1300 From the British Library Online Gallery Medium Ink and pigments on vellum Date 1300 Shelfmark Royal MS 12 E xxv Item number f 153v Length 17 5 Width 12 5 Scale Centimetres Genre Illuminated manuscript PD-old-100 Medieval university Illuminated manuscripts in the British Library British Library Royal Manuscripts |