Lot Essay
'Abu Ma'shar Jafar ibn Muhammad ibn 'Umar al-Balkhi was a famous early astrologer born in Balkh who worked in Baghdad and died in Wasit. He was the number of many astrological works and was known as Albumasar in medieval Europe. The most notable astrological work ascribed to him is the 'Prediction of Changes of Years and Births'. A manuscript in Cairo titled Kitab Akham al-Qiranat wa'l Kawakib wa'l Buruj al-Ithnay 'Ashra (Book of Indication of Conjunction and Corrections of Stars with some other Stars), is very probably the same work (B.A. Rosenfeld and E. Ihsanoglu, Mathematicians, Astronomers and other Scholars of Islamic Civilisation and their Works (7-19th Century), Istanbul, 2003, no. 88, p. 34).