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Long Cubit


The long cubit is an ancient unit of length that is a variation of the standard cubit, measuring from the elbow to the tip of the middle finger. The long cubit is longer than the common cubit, typically about 21 inches (approximately 53 centimeters).


It was used in ancient civilizations such as Egypt and Mesopotamia for construction, land measurement, and crafts, especially when more precision or a larger unit was needed.


Key points:



  • Long cubit ≈ 21 inches (53 cm)



  • Longer than the standard cubit (usually about 18 inches)



  • Used in ancient architecture and surveying



  • Provided a larger base unit for measurements in construction



The long cubit helped ancient builders and surveyors manage larger scales while still relying on the human body as a reference.


Barleycorn


A barleycorn is an old English unit of length, traditionally based on the length of a grain of barley. It is defined as exactly 1/3 of an inch or approximately 8.47 millimeters.


Historically, the barleycorn was used for measuring small lengths and was also the basis for the inch, which was originally considered to be three barleycorns long. It played a role in various traditional measurements, including shoe sizing in English-speaking countries, where shoe sizes were sometimes expressed in barleycorn units.


Although obsolete as a formal unit, the barleycorn remains culturally significant, especially in shoe sizing systems.


Summary:



  • 1 barleycorn = 1/3 inch ≈ 8.47 mm



  • Based on the length of a grain of barley



  • Used historically in small measurements and shoe sizing



  • Mostly of historical and cultural interest today





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