Johnson's natural philosophy and key to philosophical charts : illustrated with 500 cuts; being reduced photographic copies of all the diagrams contained in the author's philosophical series of indestructible school charts ; for the use of schools and families (1878)
338 MAGNETISM. 601. Figure 34.—The armature.—The effective power of thelodestone is improved by rneaus of what is termed an armatiire ; which Fig. 34 … consists of pieces of soft iron, AE and TH, applied to the opposite polarsurfaces, S and N, of the lodestone, M. The attractive force is thustransmitted to the artificial poles of iron, E and H. 602. Figure 36.—A fully-mounted lodestone magnet. —This consists of the armatures secured to the…
Physics · Astronomy
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