OF LONG AGO
Mohammed lived there, and they tell of Harun-al-Rashid (hä rōōn' är rå shēd'), a name which means Aaron the Just. Mohammed the son of Moses knew Harun’s son, and the two used to study and work together in the caliph’s observatory at Bagdad.
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ARABIC NUMERALS
Numerals from 1 to 9, with a dot for zero, as used by the Arabs. They are not like the numerals that we sometimes call Arabic
Mohammed the son of Moses found the Arabs of Bagdad using numerals that were quite different from those used by us to-day. From certain wise men who came to Bagdad from India about this time, however, Mohammed learned the numerals used in that country, and these were somewhat like ours. He believed that they were better than the
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HINDU NUMERALS
Numerals from 1 to 9, with zero, used by the Hindus and taken to Bagdad about 1150 years ago
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