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| | The Dutch Windmill : |
 | | In the case of the sails of a windmill, when revolving, the part near the shaft has a relatively low speed, but the speed with which the stock cleaves the air becomes greater for each point that is further away from the shaft. |
 | | In front the underside of the body of a wip mill is often delicately curved; in the middle of the breast there is a borstnaald (prick post), which in turn ends in a finial in the form of a drop-shaped knob, ball, acorn, or the like at the bottom. |
 | | By the side of the drainage mills we see, in the immediate neighbourhood, the simple 'summer house' of the miller; near the mill there are the scoop wheel or the Archimedean screw with the automatic sluice door, the head race which feeds the water to be pumped, and the tail race which discharges it. |
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