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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: reasoning to experiment is far higher than in any of Faraday's
previous works. Amid much that is entangled and dark we have
flashes of wondrous insight and utterances which seem less the
product of reasoning than of revelation. I will confine myself here
to one example of this divining power. By his most ingenious device
of a rapidly rotating mirror, Wheatstone had proved that electricity
required time to pass through a wire, the current reaching the
middle of the wire later than its two ends. 'If,' says Faraday,
'the two ends of the wire in Professor Wheatstone's experiments were
immediately connected with two large insulated metallic surfaces
exposed to the air, so that the primary act of induction, after
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