|Chapter 1||The Earth|
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.
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