What is MENISCUS? The departure from a flat surface where a liquid meets a solid, due to surface tension. The effect can be seen clearly through the wall of a glass tube. The surface of water in air rises up the wall of the tube, while that of mercury is depressed, SIGHT-FEED LUBRICATOR.
An abandoned mud-covered scooter is found during the draining of the Canal Saint-Martin in Paris, France Charles Platiau/Reuters
1 French Drain problems begin as they slowly become clogged by sediment. 2  A basement leak can cause water to seep inside the hollow voids of the masonry creating damp walls that will dissolve water soluble elements such as calcium, lime, and other minerals out of your cement.