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
Old radios, motorcycles and LOTS of bikes: Paris drains iconic canal for the first time in 15 years and uncover a host of discarded debris. 1  The Canal Saint-Martin is at the heart of one of the city's most exclusive neighbourhoods, the 10th arrondissement.