[1.2] For example, when you study the shape of any stone or, as well, of any regularly or irregularly shaped clump, you will soon find that its center of gravity is not located equally in all parts of it. In particular, you may learn this most easily from a bulky wooden stake if you put it on the water and it will always dip its center of gravity deepest into the water. Thus this is the second point which everybody can easily find in every object.
[1.3] The third point with regard to a body is its true center. It should, however, never be confused with the body’s center of gravity. Thus every body has two center points, one of gravity and another one of its physical measurements. You may also examine all kinds of bodies in this way, and you will never find that the center of gravity will completely coincide with the center of physical measurements. This would not even happen in the instance of a perfect, mathematically properly founded metal ball, and this is because no body ever consists of so perfectly even parts that the point of gravity would coincide precisely with the actual center of its physical measurements.