411 REFERENCE · Wiktionary
Nobili's rings
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
After Leopoldo Nobili, the Italian physicist who first described them in 1826.
Noun
p Nobili's rings
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.
en eponyms