* * * * *
MAGNETISM IN ITS RELATION TO INDUCED ELECTROMOTIVE FORCE AND
CURRENT.[1]
[Footnote 1: A paper read before the American Institute of
Electrical Engineers, New York, May 22, 1889.]
By ELIHU THOMSON.
There is perhaps no subject which at the present time can have a
greater interest to the physicist, the electrician, and the electrical
engineer than the one which heads this paper. The advances which have
been made in the study from its purely theoretical or scientific side,
and the great technical progress in the utilization of the known facts
and principles concerning magnetic inductions, can but deepen and
strengthen that interest.
On the side of pure theory we find the eager collection of
experimental data to be submitted to the scrutiny of the ablest and
brightest minds, to be examined and reasoned upon with the hope of
finding some clew to satisfying explanations, and on the side of
practice we find the search for new facts and relations no less
diligent, though often stimulated by practical problems presented for
solution. Indeed, the urgency for results is often the greater on the
practical side, for theory can wait, practice cannot, at least in the
United States.
We must look for continued triumphs in both directions, and the most
welcome of all will be the framing of a theory or explanation which
will enable us to interpret magnetic and electric phenomena.
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