Health Boards


Encyclopedia


My Profile

Health Boad


Health Jobs


Shopping


Health Tools

Secci disk

A black-and-white disk lowered into the water to measure water transparency; an average is taken of the depth at which the disk disappears when lowered and reappears when raised.


Selected Secci disk links:

© 1997-2006 Healthboard.com.   Healthboard.com is a purely informational website, and should not be used as a substitute for professional legal, medical or technical advice.