Ancient Mesopotamian units of measurement explained

Ancient Mesopotamian units of measurement originated in the loosely organized city-states of Early Dynastic Sumer. Each city, kingdom and trade guild had its own standards until the formation of the Akkadian Empire when Sargon of Akkad issued a common standard. This standard was improved by Naram-Sin, but fell into disuse after the Akkadian Empire dissolved. The standard of Naram-Sin was readopted in the Ur III period by the Nanše Hymn which reduced a plethora of multiple standards to a few agreed upon common groupings. Successors to Sumerian civilization including the Babylonians, Assyrians, and Persians continued to use these groupings. Akkado-Sumerian metrology has been reconstructed by applying statistical methods to compare Sumerian architecture, architectural plans, and issued official standards such as Statue B of Gudea and the bronze cubit of Nippur.

Archaic system

The systems that would later become the classical standard for Mesopotamia were developed in parallel with writing in Sumer during Late Uruk Period (c. 3500–3000). Studies of protocuneiform indicate twelve separate counting systems used in Uruk IV-III. Seven of these were also used in the contemporary Proto-Elamite writing system.[1] The bisexagesimal systems went out of use after the Early Dynastic I/II period.[2]

In Early Dynastic Sumer (–2300 BCE) metrology and mathematics were indistinguishable and treated as a single scribal discipline. The idea of an abstract number did not yet exist, thus all quantities were written as metrological symbols and never as numerals followed by a unit symbol. For example there was a symbol for one-sheep and another for one-day but no symbol for one. About 600 of these metrological symbols exist, for this reason archaic Sumerian metrology is complex and not fully understood.[3] In general however, length, volume, and mass are derived from a theoretical standard cube, called 'gur (also spelled kor in some literature)', filled with barley, wheat, water, or oil. However, because of the different specific gravities of these substances combined with dual numerical bases (sexagesimal or decimal), multiple sizes of the gur-cube were used without consensus. The different gur-cubes are related by proportion, based on the water gur-cube, according to four basic coefficients and their cubic roots. These coefficients are given as:

One official government standard of measurement of the archaic system was the Cubit of Nippur (2650 BCE). It is a Euboic Mana + 1 Diesis (432 grams). This standard is the main reference used by archaeologists to reconstruct the system.

Classical system

A major improvement came in 2150 BCE during the Akkadian Empire under the reign of Naram-Sin when the competing systems were unified by a single official standard, the royal gur-cube.[4] His reform is considered the first standardized system of measure in Mesopotamia. The royal gur-cube (Cuneiform: LU2.GAL.GUR, ; Akkadian: šarru kurru) was a theoretical cuboid of water approximately 6 m × 6 m × 0.5 m from which all other units could be derived. The Neo-Sumerians continued use of the royal gur-cube as indicated by the Letter of Nanse issued in 2000 BCE by Gudea. Use of the same standard continued through the Neo-Babylonian Empire, Neo-Assyrian Empire, and Achaemenid Empire.

Length

Units of length are prefixed by the logogram DU a convention of the archaic period counting system from which it was evolved. Basic length was used in architecture and field division.

Basic Length
Unit Ratio Sumerian Akkadian Cuneiform
grain še uţţatu
finger šu-si ubānu
foot šu-du3-a šīzu
1 kuš3 ammatu
step 2 ĝiri3 šēpu
reed 6 gi qanû
rod 12 nindan nindanu
cord 120 eše2 aslu

Distance units were geodectic as distinguished from non-geodectic basic length units. Sumerian geodesy divided latitude into seven zones between equator and pole.

Distance
Unit Ratio Sumerian Akkadian Cuneiform
rod nidan nindanu
cord eše2 aslu
cable 1
league 30 da-na bêru

Area

The GAN2 system G counting system evolved into area measurements. A special unit measuring brick quantity by area was called the brick-garden (Cuneiform: SIG.SAR ; Sumerian: šeg12-sar; Akkadian: libittu-mūšaru) which held 720 bricks.

Basic Area
Unit Ratio Dimensions Sumerian Akkadian Cuneiform
shekel 1 kuš3 × 1 kuš3 gin2 šiqlu
garden 1 12 kuš3 × 12 kuš3 sar mūšaru
quarter-field 25 60 kuš3 × 60 kuš3 uzalak ?
half-field 50 120 kuš3 × 60 kuš3 upu ubû
field 100 120 kuš3 × 120 kuš3 iku ikû
estate 1800 bur būru

Capacity or volume

Capacity was measured by either the ŠE system Š for dry capacity or the ŠE system Š* for wet capacity.

Basic Volume
Unit Ratio Sumerian Akkadian Cuneiform
shekel gin2 šiqlu
bowl 1 sila3
vessel 10 ban2 sutū
bushel 60 ba-ri2-ga (barig) parsiktu
gur-cube 300 gur kurru

A sila was about 1 liter.[5]

Mass or weight

Mass was measured by the EN system E

Values below are an average of weight artifacts from Ur and Nippur. The ± value represents 1 standard deviation. All values have been rounded to second digit of the standard deviation.

Basic Mass
Unit Ratio Mean Value Sumerian Akkadian Cuneiform
grain 46.6±1.9 mg še uţţatu
shekel 1 8.40±0.34 g gin2 šiqlu
mina 60 504±20 g ma-na manû
talent 3,600 30.2±1.2 kg gun2 biltu or kakaru
[6] [7] [8]

Time

See main article: Babylonian calendar. In the Archaic System time notation was written in the U4 System U. Multiple lunisolar calendars existed; however the civil calendar from the holy city of Nippur (Ur III period) was adopted by Babylon as their civil calendar.[9] The calendar of Nippur dates to 3500 BCE and was itself based on older astronomical knowledge of an uncertain origin. The main astronomical cycles used to construct the calendar were the month, year, and day.

Basic Time [10]
Unit Ratio Sumerian Akkadian Cuneiform
gesh mu-eš geš
watch da-na bêru
day 1 ud immu
month 30 itud arhu
year 360 mu šattu

Relationship to other metrologies

The Classical Mesopotamian system formed the basis for Elamite, Hebrew, Urartian, Hurrian, Hittite, Ugaritic, Phoenician, Babylonian, Assyrian, Persian, Arabic, and Islamic metrologies.[11] The Classical Mesopotamian System also has a proportional relationship, by virtue of standardized commerce, to Bronze Age Harappan and Egyptian metrologies.

See also

References

Bibliography

Further reading

External links

Notes and References

  1. Dahl, Jacob L., "The Proto-Elamite writing system", in The Elamite World, pp. 383–396, 2018
  2. Bartash, Vitali, "From burden to talent", Establishing Value: Weight Measures in Early Mesopotamia, Berlin, Boston: De Gruyter, pp. 16-35, 2019
  3. Melville 2006.
  4. Book: Powell, Marvin A.. Metrology and Mathematics in Ancient Mesopotamia. 1995. Civilizations of the Ancient Near East. Sasson. Jack M.. III. 1955. New York, NY. Charles Scribner's Sons. 0-684-19279-9. registration.
  5. https://cdli.mpiwg-berlin.mpg.de/articles/cdlj/2012-2 Sumerian Beer: The Origins of Brewing Technology in Ancient Mesopotamia
  6. Mesopotamian Mensuration: Balance Pan Weights from Nippur. December 13, 2005. Journal of the Economic and Social History of the Orient. 48. 3. 345–387. 10.1163/156852005774342894. www.academia.edu.
  7. Weighing in Mesopotamia: The Balance Pan Weights from Ur. William B.. Hafford. August 1, 2012. Akkadica. www.academia.edu.
  8. Book: West Semitic Vocabulary in the Akkadian Texts from Emar. 9789004369870. Pentiuc. Eugen J. . Eugen J. Pentiuc. 14 August 2018. BRILL .
  9. Ronan, 2008
  10. Kasprik . L A . Barros . A C . April 2020 . Ancient Mesopotamian's system of measurement: possible applications in mathematics and physics teaching . Journal of Physics: Conference Series . 1512 . 1 . 012039 . 10.1088/1742-6596/1512/1/012039 . 1742-6588. free . 2020JPhCS1512a2039K .
  11. Conder 1908, p. 87.