Page:On the various forces of nature and their relations to each other.djvu/39

is a difficult matter—I cannot make it stand steadily. But if I embarrass this poor old lady with a world of trouble, and hang this wire with bullets at each end about her neck, it is Fig. 7.very evident that, owing to there being those balls of lead hanging down on either side, in addition to the lead inside, I have lowered the centre of gravity, and now she will stand upon this point (fig. 7) ; and what is more, she proves the truth of our philosophy by standing sideways.

I remember an experiment which puzzled