Centre of Gravity

That point about which all the parts of a body do, in any situation, exactly balance each other. Hence, I. If a body be suspended by this point as the centre of motion it will remain at rest in any position indifferently. 2. If a body be suspended in any other point, it can rest only in two positions, viz.: when the centre of gravity is exactly above or below the point of suspension. 3. When the centre of gravity is supported the whole body is kept from falling. 4. Because this point has a constant tendency to descend to the centre of the earth, therefore--5. When the point is at liberty to descend, the whole body must also descend, either by sliding, rolling or tumbling over.