"Electrical wiring" for a lamp in a 110V network. The lamp is lighting a former stamp-mill now preserved as a workshop. The originally blank wires were insulated by sleeves of tar-soaked cotton and later on plastic-coated. They are kept apart from the wooden framework by doughnut insulators. The devices belong to ‘Tobias trip-hammer’ at Ohrdruf Industrial Hamlet, Thuringia.