The three circuits: a study of the primary forces . filings having been repelled from the centre of it their weight has carried themaway. The second example showsboth attraction and repulsion ;but as the repel 1 ant force is notsufficient to overcome bothweight and friction, and pushthe filings out to their properplaces, the course of the secondcircuit is not perfectly assume, that if the magnet and filings could beFlG 5# freely suspended, the latter would be found arranged as inFig. 5. So far we have had only anequatorial view of a magnetand its forces in plane. , represent
The three circuits: a study of the primary forces . filings having been repelled from the centre of it their weight has carried themaway. The second example showsboth attraction and repulsion ;but as the repel 1 ant force is notsufficient to overcome bothweight and friction, and pushthe filings out to their properplaces, the course of the secondcircuit is not perfectly assume, that if the magnet and filings could beFlG 5# freely suspended, the latter would be found arranged as inFig. 5. So far we have had only anequatorial view of a magnetand its forces in plane. , represents a polar projectionof the same magnet. Here re-pulsion, or the third circuit, isall that appears. Pictures can go no we desire to see a magnet with all its forces inoperation at once, we must imagine it and the filings «\V\\«7,« ? —-^-»\< .v.*,.»; ft, :??: -,-::: - \\\\. WORLD FORMATION. 75 in perfect suspension : absolutely in equilibrio. Thenwe can see the extremities of the magnet gatheringin and incorporating the filings,and its central parts at the sametime pushing them off. Andwe can also see that thoughthe magnet is a bar, the ma-terial and the operation assumeat once a spherical shape. 0///Mifi^$$^ //iiijV,.^- Now leaving this example,and assuming that Fig. 4 is the earth, and studyingits forces in plane, we find that as the joint forces ofthe first and second circuits are examined northwardfrom the north magnetic parallel to the north pole,they represent more and more the influence of thesystem lying north; until at the pole itself, thefilings on the magnet and the magnetic needle onthe earth stand vertical; showing that the cun haslost its power, and that the system lying north hasassumed full control. We also find, that as the force of the second cir-cuit is examined southward from the north magneticpole to the equator, it gradually becomes
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Keywords: ., bookcentury1800, bookdecade1890, bookidthreecircuit, bookyear1892
