Abd al-Rahman al-Shafi'i wrote a handbook for the use of Police Officers in charge of markets enabling them for instance to verify weights and measures and to test the genuineness of wares.
Haly Abenragel or the Arabic name Abû l-Hasan 'Alî ibn Abî l-Rijâl, was an Arab astrologer of the late 10th and early 11th century, best known for his Kitāb al-bāri' fi akhām an-nujūm.
Born on 988 Died on 1061
Abul Hasan Al-Misrî, was a physician and author of many medical writings of which the most popular was his commentary on Galen's Ars Parva which was translated by Gherardo Cremonese. For more detail click here.