Nobili's Rings Definition
noun
Coloured rings formed upon a metal plate by the electrolytic disposition of copper , lead peroxide , etc. They may be produced by touching with a pointed zinc rod a silver plate on which is a solution of copper sulphate .
Wiktionary
Origin of Nobili's Rings
After Leopoldo Nobili, the Italian physicist who first described them in 1826.
From Wiktionary
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