Compendium on Using the Device Known as the Almucantar Quarter

Description

This work, by a timekeeper at the Al-Azhar Mosque in Cairo, is an important and comprehensive textbook on timekeeping. It introduces the useful device of dividing a quarter of a circle of projection into sections known as almucantars (muqanṭarāt). The work, comprising 100 folio pages, contains 30 chapters and a conclusion. The work was composed in 1440-1 (844 A.H.) and was copied in 1757 (1170 A.H.).

Date Created

Subject Date

Language

Title in Original Language

حاوى المختصرات فى العمل بربع المقنطرات

Type of Item

Physical Description

50 leaves; 15 x 21.5 centimeters

Last updated: September 22, 2014