Early Egyptian Measurements: Difference between revisions
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[[File:Rope stretching.jpg|right| | [[File:Rope stretching.jpg|right|800px|A rope being used to measure fields. Taken from the Tomb of Menna]] | ||
=====Introduction===== | =====Introduction===== | ||
Measurement and Surveying was important in '''[[:Category:Ancient Egypt|Ancient Egypt]]''' because the annual floods buried or destroyed boundary markers, which then had to be re-established to check ownership of the fields. | Measurement and Surveying was important in '''[[:Category:Ancient Egypt|Ancient Egypt]]''' because the annual floods buried or destroyed boundary markers, which then had to be re-established to check ownership of the fields. | ||
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[https://en.wikipedia.org/wiki/Measuring_rod#Ancient_Egypt|'''Cubit Rods'''] were made from wood, slate or stone, some with markings to show sub-divisions. The [https://en.wikipedia.org/wiki/Cubit#Ancient_Egyptian_royal_cubit|’’’Ancient Egyptian Royal Cubit’’’] was divided into 7 [https://en.wikipedia.org/wiki/Palm_(unit)#Ancient_Egypt|’’’Palms’’’]. A '''Palm''' was based on the width of the palm of the hand. | [https://en.wikipedia.org/wiki/Measuring_rod#Ancient_Egypt|'''Cubit Rods'''] were made from wood, slate or stone, some with markings to show sub-divisions. The [https://en.wikipedia.org/wiki/Cubit#Ancient_Egyptian_royal_cubit|’’’Ancient Egyptian Royal Cubit’’’] was divided into 7 [https://en.wikipedia.org/wiki/Palm_(unit)#Ancient_Egypt|’’’Palms’’’]. A '''Palm''' was based on the width of the palm of the hand. | ||
[[File:Cubit rod Turin Museum.PNG|center|600px|]] | [[File:Cubit rod Turin Museum.PNG|center|600px|Cubit rod from the Turin Museum]] | ||
[[File:PalmDigit.png|right|250px|]] | [[File:PalmDigit.png|right|250px|]] | ||
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=====Cord===== | =====Cord===== | ||
It is probable that for convenience, there were also Rods made which were several Cubits long and for surveying purposes, Egyptians used a knotted rope or '''Cord''' of 100 Cubits length. Ancient Egyptian surveyors were known as '''Harpedonapata''' or '''rope-stretchers''' and a length of rope longer than 100 Cubits may have been too difficult to pull tight when measuring. | It is probable that for convenience, there were also Rods made which were several Cubits long and for surveying purposes, Egyptians used a knotted rope or '''Cord''' of 100 Cubits length. Ancient Egyptian surveyors were known as '''Harpedonapata''' or '''rope-stretchers''' and a length of rope longer than 100 Cubits may have been too difficult to pull tight when measuring. | ||
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<span style="color: blue">'''Activity:'''</span> | |||
* <span style="color: blue">Make your own '''Cubit Rod''' from a length of '''[[Stripwood Technology Materials|Stripwood]]''' and mark on it '''Palms''' and '''Digits'''. Use measurements from your own arm, or take an average from everyone in your class. Use your '''Cubit Rod''' to measure items of furniture around you in '''Cubits''', '''Palms''', and '''Digits'''.</span> | |||
* <span style="color: blue">Take a ball of thick string and tie a knot in it every 10 Cubits to make a '''Cord''' 100 Cubits long. Use this '''Cord''' to measure your garden or school playground in '''Cubits'''</span> | |||
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[[Category:Primary]] | [[Category:Primary]] | ||
Latest revision as of 19:13, 10 March 2021
Introduction
Measurement and Surveying was important in Ancient Egypt because the annual floods buried or destroyed boundary markers, which then had to be re-established to check ownership of the fields.
The Egyptians are thought to have developed the Cubit. This measurement was used by many ancient peoples and in the Middle Ages. It is taken to be the length from the bent elbow to the tips of the fingers – a distance of approximately 18 inches or 450mm. The actual measurement would vary from person to person and so standard Cubit length rods were made and placed in Temples where they could be accessed for reference.
Cubit Rod
Cubit Rods were made from wood, slate or stone, some with markings to show sub-divisions. The Egyptian Royal Cubit’’’ was divided into 7 [1]. A Palm was based on the width of the palm of the hand.
Palm
Palms were further divided into 4 [2] based on the width of the human fingers which was a common unit of measurement in ancient times. So four Digits equal one Palm and seven Palms equal one Cubit - the wooden Cubit Rod, one Cubit long, was marked in Palm and Digit divisions and used by Architects and Surveyors as we now use our modern Rules.
Cord
It is probable that for convenience, there were also Rods made which were several Cubits long and for surveying purposes, Egyptians used a knotted rope or Cord of 100 Cubits length. Ancient Egyptian surveyors were known as Harpedonapata or rope-stretchers and a length of rope longer than 100 Cubits may have been too difficult to pull tight when measuring.
Activity:
- Make your own Cubit Rod from a length of Stripwood and mark on it Palms and Digits. Use measurements from your own arm, or take an average from everyone in your class. Use your Cubit Rod to measure items of furniture around you in Cubits, Palms, and Digits.
- Take a ball of thick string and tie a knot in it every 10 Cubits to make a Cord 100 Cubits long. Use this Cord to measure your garden or school playground in Cubits