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from The Century Dictionary and Cyclopedia

  • n. A vessel, usually rectangular, forming an enlargement in an open channel or flume, within which the current-flow may be reduced in velocity and the eddy action checked: designed to enable the water to approach a weir, at the down-stream end of the box, with the steady solid flow which is necessary if accuracy is to be secured in any measurements of flow depending on weir formulæ.


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