Diagrams illustrate how items stay buoyant.
M/S as a balloon floats upwards, M/S of a row of barrage balloons. A woman checks her suspender belt. M/S of ladies in diaphanous dresses, looks like the same girl superimposed. M/S of Ivor the imp in a test tube, he floats to the top. Diagrams show how gravity affects ice and tin. Another diagram shows how Ivor is pushed to the top by water displacement. A lead weight shows balance. Another chart shows how far down a ship can safely go in the water. M/S of German ship. M/S of Adolf Hitler and Benito Mussolini together.