Ḥaṭṭ al-niqāb ʻan wujūh aʻmāl al-ḥisāb. [حط النقاب عن وجوه اعمال الحساب]

Kislak Center for Special Collections, Rare Books and Manuscripts, Oversize LJS 481. Morocco?, 1400. Commentary on the summary of arithmetical operations by the late 13th- and early 14th-century scholar Ibn al-Bannāʼ. Demonstrates with examples the calculation of sums involving fractional numbers and square roots. Extensive marginal notes on a few leaves (p. 20-35). The first leaf is missing and the text ends abruptly. Several leaves have restored outer margins. Pages 189-194 missing text because of conservation after water damage. Penn Libraries Catalog: go to Find