Proportion. Mathematical term,
Bradwardine, Thomas, 1290?-1349. #*Q.405.58 Tractatus proportionii plusquam aureus. ——  [Leipzig. Martin Landsberg. 1495?] (18) ff. 33 lines. Black letter. Blank spaces for initial capitals. 20.5 cm., in 6s. Folio 18 is blank.
See Hain-Nachtrage, no. 351. For author see Smith, D. E., Rara arithmetica, vol. 1, p, 117.
This card was printed at the Boston & Public Library February 26, 1937. E1264 — Proportion. Mathematical term.