Brechner, Claude H., 1887- [from old catalog] · Boston, New York [etc.] Allyn and Bacon · leaf 159
r the north geographical pole is really a S magnetic pole. Likewise the N magnetic pole ofthe earth is in the south. 178. Field of a Magnet. — We have seen that a magnetwill attract iron filings even when they are not touching it.What is it that harnesses the iron filings to the magnet,since we… … Figure 131. — Field about a Bar Magnet. Just what these lines of force are no one is able to explain ;and for want of a better name they are said to be strains inthe ether. If a piece of paper is placed over a bar magnet and ironfilings are sifted on it, the filings will arrange themselves inlines…
Physics
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