Al-Adami

ʿAbū ʿAlī al-Ḥusayn ibn Muḥammad al-Ādamī (Arabic: أبو علي الحسين بن محمد الآدمي; flourished in Baghdad c. 925) was a maker of scientific instruments who wrote an extant work on vertical sundials, Techniques, Walls, and the Making of Sundials (Kitab takhlTt al-sa v at wa inhiraf al-hTtan wa’l-zilalat wa alTad al-sumut). The manuscript, which is held in the Bibliothèque nationale de France, contains tables that enabled the drawing of lines to show any desired angle of latitude. The surviving copy of al-Adami's 10th century manuscript (Arabe 2506,1 (fols. 1r-62r) dates from the 15th century, which King has suggested was written either by al-Adami or by a contemporary, Sa'id ibn Khafif al-Samarqandi. The tables on folios. 31v–33v were intended to be used in the construction of a vertical sundial.

According to the Iranian polymath al-Biruni, al-Adami was the first to demonstrate solar and lunar eclipses using a "disc of eclipses". Al-Adami was named in the Fihrist, written by the 10th century scholar Ibn al-Nadīm.

The astronomer Ibn al-Adami, who is thought by scholars to have been al-Adami's son, wrote Naẓm al-ʿiqd (now lost), a zīj that used information obtained from the Sindhind, an Indian source translated into Arabic by the 8th century mathematician and astronomer Ibrāhīm al-Fazārī. The Naẓm al-ʿiqd was first published in 949/950.