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Mo (Chinese: 磨; pinyin: mò; lit. 'mill') [1] [2] were stone implements used for grinding wheat in ancient China. [1] [2] It was a rotary quern millstone powered by a hand-operated crank fixed at the top to grind and pulverize grains, wheat, and rice into flour.
A mill is a device, often a structure, machine or kitchen appliance, that breaks solid materials into smaller pieces by grinding, crushing, or cutting. Such comminution is an important unit operation in many processes .
The handstone of a rotary quern is much heavier than that of saddle quern and provides the necessary weight for the grinding of unmalted grain into flour. In some cases the grinding surfaces of the stones fit into each other, the upper stone being slightly concave and the lower one convex. Rotary hand quern at the Estonian Open Air Museum
The diagram depicts a runner stone. Grinding mechanism in an old Swedish flour mill, 2005 The old water mill at Decew Falls in St. Catharines in Southern Ontario, 2009. The Greek geographer Strabo reported in his Geography that a water-powered grain-mill existed near the palace of king Mithradates VI Eupator at Cabira, Asia Minor, before 71 BC. [1]
According to de Barry, the oldest circular stone millstone was unearthed in the ruins of the town of Olynthus: it was the millstone of an oil mill, not a flour mill. Historians Marie-Claire Amouretti and Georges Comet [17] point out that these millstones pre-date the earliest known examples of circular grain mills. So it was probably through ...
Pedal-powered grinding machine, Russia, 1902. A grinding machine, often shortened to grinder, is any of various power tools or machine tools used for grinding. It is a type of material removal using an abrasive wheel as the cutting tool. [1] Each grain of abrasive on the wheel's surface cuts a small chip from the workpiece via shear deformation.
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