Definitionn. the slow passage of a liquid through a filtering medium
Last update: August 5, 2015
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An additional difficulty arises in the case of observations made with long mercury thermometers buried in vertical holes, that the correction for the expansion of the liquid in the long stems is uncertain, and that the holes may serve as channels for percolation, and thus lead to exceptionally high values. [Please select]
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In summer, these streams may become intermittent, but springs and subsurface percolation maintain pool-levels (Minckley and Cross, _loc.) [Please select]
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In this the elephants contrive to sink wells for their own use by scooping out the sand to the depth of four or five feet, and leaving a hollow for the percolation of the spring. [Please select]
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The old grate used for coal is loosely covered with bricks and cinder, so that a slight percolation of air may take place through them. [Please select]
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