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"The disintegrator consists of a pair of circular metal disks, set face to face, studded with circles of projecting bars so arranged that circles of bars on one disk alternate with those of the other. The disks are mounted on the same centre, and so closely set to one another that projecting bars of one disk come quite close to plane surface of the other. They are inclosed within an external casing. The disks are caused to rotate in opposite directions with great rapidity, and the grain is almost instantaneously reduced to a powder."

After grinding comes bolting, by which process the different grades of flour are obtained.

The ground wheat is placed in octagonal cylinders (covered with silk or linen bolting-cloth of different degrees of fineness), which are allowed to rotate, thus forcing the wheat through. The flour from first siftings contains the largest percentage of gluten.

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