Unpublished paper, 'Upon real, and apparent metallic oxides produced by electrical discharges' by John Cuthbertson Cuthbertson describes a series of experiments focused on rendering metals into oxides through electric discharges, a phenomenon that Cuthbertson and Dr [Martin] van Marum discovered by chance. Cuthbertson's experiments used tin wire, iron wire, copper wire, silver wire, and gold wire. Subject: Chemistry / Physics [early 19th century]