its armature, wouldprevent attraction while thus interposed. The editorial sanc-tum of the Scientific American has often been compelled,in answer to correspondence, to confess its ignorance of anysubstance of which such a septum could be constructed. Hu-miliating as is the confession, we never have… … some sanguine inventor, who thinks he has discovered theperpetual motion, all but that one single thing will expectus to point him the way to success by supplying to him(privately, of course), the knowledge of the septum sought. This idea of a magnetic perpetual motion is jnst now themost prevalent…
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