EXPERIMENT 23. To test the effect of breaking a magnet.
Apparatus. A magnetized sewing-needle; iron filings; compass, O C (No. 18).
50. Directions. (A) Break the little bar magnet (needle), and test the two new ends produced for magnetism, with the iron filings. ([Fig. 10]).
(B) Touch the two new poles together to see whether they are like or unlike.
(C) Test the nature of the poles with O C ([Fig. 5])
(D) Break one of the halves and test its parts.
51. Discussion. The above results agree with the theory that each molecule is a magnet ([Exp. 18]). No matter into how many pieces a magnet is broken, each part becomes a magnet. ([Fig. 10]). This shows that those molecules near the equator of the magnet really have magnetism. Their energy, however, is all used upon the adjoining molecules; hence no external bodies are attracted at that point.