2 results in English
Map of the Great Tartary. Established upon the Accounts of Several Travelers from Various Nations and Several Observations Made in that Country
The French cartographer Guillaume de l'Isle (1675−1726) was admitted into the French Académie Royale des Sciences when he was 27 years old and subsequently became the first person to receive the title Premier Géographe du Roi (principal geographer to the king). At the time de l’Isle was engaged in cartographic research, the prestige of a cartographer and the authority of his maps were gauged by the veracity of the cartographer’s sources, i.e., the explorers and travelers who reported details of their travels to geographers and ...
Compendium on Using the Device Known as the Almucantar Quarter
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.).