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The excerpt represents the core issue or deciding factor on which you must meditate, and is drawn from Faraday as a Discoverer by John Tyndall: polarity were satisfied. The establishment of this point was
absolutely necessary to the explanation of magne-crystallic action.
With that admirable instinct which always guided him, Faraday had
seen that it was possible, if not probable, that the diamagnetic
force acts with different degrees of intensity in different
directions, through the mass of a crystal. In his studies on
electricity, he had sought an experimental reply to the question
whether crystalline bodies had not different specific inductive
capacities in different directions, but he failed to establish any
difference of the kind. His first attempt to establish differences
of diamagnetic action in different directions through bismuth, was
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