Science: to Be, or Not to Be Or, How I Discovered the Swindle of Special Relativity
|WILHELM WEBERS UNIPOLAR
INDUCTION MACHINE OF 1839
The cylindrical magnet, shown in cross section in center, is attached to a geared handcrank device at left. A metal ring around the center of the magnet makes contact with a dish of mercury placed below it. When the crank is turned, a current flows from a wire placed in the mercury dish around to the right-hand end of the magnet, and back through the magnet itself to the mercury dish.
Source: From Wilhelm Weber, Unipolare Induction, in Resultate aus den Beobachtungen des magnetischen Vereins im Jahre 1839 (Leipzig: Wedmannschen Buchhandlung, 1840)