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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:

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  1 barleycorn = 1/3 inch ≈ 8.47 mm

  
  
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  Based on the length of a grain of barley

  
  
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  Used historically in small measurements and shoe sizing

  
  
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  Mostly of historical and cultural interest today

  
  

Roman Actus

The actus was an ancient Roman unit of length used primarily in land measurement. It is approximately 120 Roman feet, which equals about 35.5 meters (around 116.5 feet).

The actus was often used to define dimensions of fields and plots of land. It was also part of Roman surveying practices, helping organize land division and property boundaries.

Key facts:

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  1 actus = 120 Roman feet ≈ 35.5 meters

  
  
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  Used in Roman land surveying and agriculture

  
  
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  Essential for measuring fields and agricultural plots

  
  
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  Reflects the Roman emphasis on precise land division

  
  

The actus highlights the sophistication of Roman engineering and property management in their time.