ploumanach

Updated: May 2, 2025

Near Ploumanach, on the northern coast of France, where the tides have a daily range of 39 feet, a small fish pond separated from the sea by a dike is arranged with gates so that at high tide the water flows in and fills it, the gates closing automatically when the tide recedes.

Various - Scientific American Supplement, No. 1178, June 25, 1898