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A Guide for the Perplexed on the Drawing of the Circle of Projection
The author of this work, Ibn al-Majdī (1366-1447 [767-850 A.H.]), was a renowned mathematician, geometrician, and astronomer. He was linked with the influential Marāgha School through his teacher, Jamāl al-Dīn al-Māridīnī, who in turn had studied with Ibn al-Shātir al-Dimashqī’. As a descendant of a powerful local family with Mamlūk ties, Ibn al-Majdī served as the official astronomer and timekeeper at Al-Azhar. The work is divided into three chapters and a conclusion. Chapter 1 covers the procedure for projecting the circle of projection (fadl al-dā’ir) onto planes that ...
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National Library and Archives of Egypt
World's Marvels and Substances Book
This text contains sections extracted from the second part of the well-known and highly popular work of cosmography known as ʻAjāʼib al-makhlūqāt, written in the 13th century (7th century AH) by Abū Yaḥyā Zakarīyā al-Qazwīnī. The work begins with a section on the sources and properties of gems and stones, followed by sections on herbs, seeds, nuts and fruits, spices, the body parts of animals, and so forth. It also contains geographical information, for example the names and locations of major bodies of water such as the Mediterranean Sea ...
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Library of Congress
The Abridged Commentary on "The Apple in the Science of Measurement"
This manuscript is a commentary on the treatise Al-Tuffāḥa fi ‘ilm al-Misāḥa (The apple in the science of measurement), which was written at the beginning of the 12th century by the mathematician Aḥmad ibn Muḥammad al-Ašh‘ari. The study of measures and measurement techniques (‘ilm al-misāha) was of great interest to Arabic mathematicians during the Middle Ages, both from theoretical and practical points of view. The ability to calculate the dimensions of landholdings was extremely important when it came to determining the correct amounts for inheritances and to calculating taxes ...
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Library of Congress