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 July 3, 1827 the first canal boat on the Ohio and Erie Canal left Akron, traveled through 41 locks and over 3 aqueducts along 37 miles (60 km) of canal, to arrive at Cleveland on July 4.