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Excerpt from Report on Current-Meter Observations in the Mississippi River, Near Burlington, Iowa, During the Month of October, 1879: Illustrated by One Sketch and Forty-One Plates
Six meters were used for these current observations, and were usually set on the wire cable equidistant from each other, and at the same distance from the bottom and surface of the river; for instance, in 21 feet depth of water the upper meter would be 3 feet below the surface, and with 3 feet between the meters, the lower one would be 3 feet above the bottom.
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