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
The fillings used today are also safer than they used to be. Your dentist will probably use gutta-percha, a resin from the Isonandra Gutta tree found on the Malay Peninsula, to fill the cavity and permanently seal the root canal. Gutta-percha is a rubberlike, waterproof substance that was used to lay the first transatlantic telegraph cable before the invention of plastic.