objectCopper PanelObjectsA named craft tool / part lemma (Copper Panel) drawn from public-domain workshop speech (polish / earth / cement / pottery / copper / hat / turner / wood / painters / dye).Copper Panel is historically related to Iron.cassell-mechanics seats orphan copper-panel beside iron as a first craft peer — object speech, not a text-container or tradition dump.from Paul N. Hasluck (ed.) · Cassell's Cyclopaedia of Mechanics, 1903 (Internet Archive cu31924021892447)historically related to · sourced · documentedsourcesCassell's Cyclopaedia of Mechanics · Paul N. Hasluck (ed.)Paul N. Hasluck (ed.), Cassell's Cyclopaedia of Mechanics (1903).