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"Lenz's apparatus for measuring the heat given off by an electric current." -Hawkins, 1917

Lenz's Apparatus

"Lenz's apparatus for measuring the heat given off by an electric current." -Hawkins, 1917

"Experiment illustrating Lenz's Law. If a copper ring be held in front of an ordinary elecromagnet, and the current circulating through the coil of the magnet be in such a direction as to magnetize the core as indicated b the letters S N, then as the current increases in the coil more and more of the lines of force proceeeding from N pass through the ring OO from left to right." -Hawkins, 1917

Lenz's Law

"Experiment illustrating Lenz's Law. If a copper ring be held in front of an ordinary elecromagnet,…