The tonnage of ships was reckoned by the gur.
Measures of Length.
| 1 uban or finger-breadth (divided into 180 parts) | 16.6 millimetres |
| 30 finger-breadths | 1 ammat or cubit (498 mm.) |
| 2 cubits | 1 great cubit (996 mm.) |
| 6 great cubits | 1 qanu or reed |
| 2 reeds | 1 gar |
| 60 gars | 1 soss or stade |
| 30 sosses | 1 kasbu or parasang (21 kilometres) |
| 2 kasbus | 1 great kasbu |
Superficial Measures.
In the Abrahamic age 180 se were probably equivalent to 1 gin, 60 gin to one sar or “garden,” 1,800 sar to 1 feddân (padânu) or “acre.” The latter was called bur-gan in Sumerian, or “10 acres,” to distinguish it from a smaller acre, which contained only 180 sar.
Time was reckoned by the kasbu or “double hour,” and in early times the weight was divided into three watches of 2 kasbus or 4 hours each. The months were originally lunar, and consisted of 30 days, an intercalary month being inserted in the calendar every six years. The zodiac was divided into 360 degrees.
Mathematics were based upon a sexagesimal system, sixty, called the soss, being the unit. The ner was equivalent to 10 sosses and the sar to 6 ners.