My Secchi Disk:

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Lending one's bicycle is a form of safe sex, possibly the safest there is. - Tom Stoppard, Arcadia

Posted by uhtceara on December 2, 2006 11:24 PM | Permalink

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My Secchi Disk

n. A disk, divided into black and white quarters, used to gauge water clarity by measuring the depth at which it is no longer visible from the surface.

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The views and opinions expressed in this page are strictly those of the page author. The contents of this page have not been reviewed or approved by the University of Minnesota.