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GRAVITATION.
raising it from the earth. All this is effected by putting a piece of lead inside the lower part of the image, and making the base of large curvature, and there you have the whole secret. But what will happen if I try to make the figure stand upon a sharp point? You observe I must get that point exactly under the centre
Fig. 7.
of gravity or it will fall over thus [endeavouring unsuccessfully to balance it]; and this you see is a difficult matter, I cannot make it stand steadily; but if I embarrass this poor old lady
