A quern-stone is a stone tool used for hand grinding materials, especially grain, and was worked in pairs, with a stationary lower saddle quern and a mobile upper stone called a muller moved back and forth across it. Later rotary querns replaced this motion with rotation around a central hole called the eye, turned by a handle set into the upper stone, and the tool was first used in the Neolithic era to grind cereals into flour.
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Source Quern-stone (Wikipedia)
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1. Quern-stone (Wikipedia)
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A quern-stone is a stone tool for hand-grinding a wide variety of materials, especially for various types of grains.
Introduction
A quern-stone is a stone tool for hand-grinding a wide variety of materials, especially for various types of grains.
In Field: Mechanical Engineering, Lead paragraph
A quern-stone is a stone tool for hand-grinding a wide variety of materials, especially for various types of grains.
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