An electric egg demonstrates luminous effects produced by electrical discharges in rarified gases. The phenomenon was noticed by natural philosophers in the seventeenth century. The form became popular in the nineteenth century. This example came from the University of Alabama. The inscription on the base reads “Max Kohl, Chemnitz.”
Ref: E. S. Fischer, Elements of Natural Philosophy (Boston, 1827), p. 637.
Max Kohl, Physical Apparatus (Chemnitz, [1912]), p. 406.
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