رسالة تمهید المستقر تحقیق معنی الممر / محمد ابن احمد البیرونی.

The Library of Congress donated copies of the digitized material (along with extensive bibliographic records) containing more than 163,000 pages of documents to ACKU, the collections that include thousands of historical, cultural, and scholarly materials dating from the early 1300s to the 1990s includes books, manuscripts, maps, photographs, newspapers and periodicals related to Afghanistan in Pushto, Dari, as well as in English, French, German, Russian and other European languages ACKU has a PDF copy of the item.

کليه حقوق دجیتالی اين کتاب برای پدیدآور و مرکز منبع معلومات افغانستان در پوهنتون کابل محفوظ است هر ﮔﻮﻧﻪ نشر و اضافه کردن آن در سایت های دیگر بیدون اجازه ممنوع است.

Only the PDF copy is available in ACKU library.

“Abu al-Rayhan al-Biruni (also known by the Latinized version of his name, Alberonius, 973–1048 AD; 362–440 AH) was an 11th-century Muslim polymath whose works and scholarly interests spanned the physical and natural sciences, mathematics, astronomy, geography, history, chronology, and linguistics. Al-Biruni was born in Kath, Khuwarazm, in present-day Uzbekistan, and died in Ghazni, in what is today east-central Afghanistan. He wrote more than 120 works and is considered the founder of Indology for his detailed description of 11th-century India. The crater Al-Biruni on the moon is named after him. Tamhīd al-mustaqarr li-taḥqīq maʻná al-mamarr (Smoothing the basis for the investigation of the meaning of transits) is a treatise dealing with the subject of light rays and shadow lengths. It was al-Biruni who discovered that light traveled more quickly than sound”—library of congress.

Dari