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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: A deep reflectiveness is the characteristic of this memoir.
In his experiments, which are perfectly beautiful and profoundly
suggestive, he takes but a secondary delight. His object is to
illustrate the utility of his conception of lines of force.
'The study of these lines,' he says, 'has at different times been
greatly influential in leading me to various results which I think
prove their utility as well as fertility.'
Faraday for a long period used the lines of force merely as
'a representative idea.' He seemed for a time averse to going further
in expression than the lines themselves, however much further he may
have gone in idea. That he believed them to exist at all times
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