ABU ABDALLAH MoHAMMED BEN Musa, of Khowarezm, who it appears, from his preface, wrote this Treatise at the command of the Caliph AL MA.MUN, was for a long time considered
as the original inventor of Algebra. “Hac ars olim a MAHOMETE, Mos1s Arahisjilio, initium sumsit: etenim hifjus rei locupes testis LEO NARDUS PISANUS.”