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)
glide it around on the two arms several times; and having brought itto a state of rest at the neutral point, L, remove it. Then turn thebar over and repeat the operation on the other side, always observing 332 MAGNETISM. to keep the unlike poles of the two magnets in contact with each other;that…
Physics · Astronomy
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