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
On a rainy day in 1977 the canal's chemicals rose to the surface and spilled into the Niagara River. Corroded barrels even broke through the ground, appearing in backyards, swimming pools, and basements.