A concave meniscus, which is what you normally will see, occurs when the molecules of the liquid are attracted to those of the container. This occurs with water and a glass tube. A convex meniscus occurs when the molecules have a stronger attraction to each other than to the container, as with mercury and glass.
Free French Forces. The Free French Forces (French: Forces franÃ§aises libres) were individuals or military units who joined Free France (la France libre), the resistance organisation founded by Charles de Gaulle in 1940 in London to continue the struggle against the Axis powers.
Allies invade France. On this day in 1944, Supreme Allied Commander General Dwight D. Eisenhower gives the go-ahead for the largest amphibious military operation in history: Operation Overlord, code named D-Day, the Allied invasion of northern France. By daybreak, 18,000 British and American parachutists were already on the ground.