Thus the Roman As being = 5049 grains, 1/100 of the Greek-Asiatic talent, 80 As, = 403,920 grains = 57·7 lb., came to coincide with the Attic monetary talent.
7. The Arabic Talent
To the talents and measures of capacity evolved from the feet of the three principal cubits of antiquity, must be added the talent and other measures evolved from the Black foot of Al-Mamūn’s cubit. They have had great influence on the weights and measures of Europe.
Al-Mamūn’s cubit was = 21·28 inches, the foot = 14·186 inches.
The foot cubed gave a measure of water, the weight of which was the Egyptian Cantar or Cental—
14·18683 = 2855 c.i. = 102·92 lb. water = 720,441 grs.
This talent was divided in two ways:
1. As the Romans had divided the Alexandrian talent into 125 pounds of 12 ounces, so the new talent was divided into 125 parts each = 5763 grains. This was the Arabic lesser Rotl, its ounce = 480·25 grains. The rotl was also divided in the Greek way into 100 drachms or dirhems = 57·63 grains.
2. Another mode of division was into 100 greater Rotl, thus becoming a Cental of 100 lb. each = 7204·4 grains.
This greater rotl was divided, commercially into 16 ounces (Ar. ukyé, Gr. oggia, L. uncia) of 450,275 grains, and uncially for coin-weight into 12 × 12 dirhems of 50·03 grains.