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Long Reed

The long reed is an old English unit of length used primarily in measuring land, especially in agriculture and surveying. It is traditionally equal to 16.5 feet or 5.03 meters.

The long reed was used alongside other units like the rod, pole, and perch, often interchangeably, to measure distances and plot boundaries.

Key points:

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  1 long reed = 16.5 feet ≈ 5.03 meters

  
  
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  Used historically in land measurement and agriculture

  
  
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  Equivalent or similar to the rod, pole, or perch

  
  
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  Important in English customary measurement systems

  
  

Though obsolete now, the long reed is part of the rich history of traditional English measurement units.

Microinch

A microinch is a very small unit of length used primarily in precision engineering and manufacturing. It equals one-millionth of an inch (0.000001 inch), which is approximately 0.0254 micrometers (µm).

Microinches are used to measure extremely fine tolerances, surface finishes, and thicknesses in high-precision machining, electronics, and materials science.

Key facts:

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  1 microinch = 0.000001 inch

  
  
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  1 microinch ≈ 0.0254 micrometers (µm)

  
  
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  Used in precision engineering for very small measurements

  
  
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  Allows for accurate description of surface roughness and thickness

  
  

The microinch is essential in fields requiring ultra-fine measurements where standard units like the inch or millimeter are too large.