Two Definitions of Moment
The preferred definition of a magnetic moment has changed over time. Before the 1930s, textbooks defined the moment using magnetic poles. Since then, most have defined it in terms of Ampèrian currents.
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—G.C. (Georg Christoph)
“Man is a stream whose source is hidden. Our being is descending into us from we know not whence. The most exact calculator has no prescience that somewhat incalculable may not balk the very next moment. I am constrained every moment to acknowledge a higher origin for events than the will I call mine.”
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