The quickest and cheapest method of polishing tarnished copper is to buff up the article on a polishing machine; if this is impracticable, it may be polished by hand. To do this, mix some fine flour emery with sweet oil until a thin paste is formed, and, using a piece of house flannel as a pad, scour the tarnished surface with the paste until the surface is quite clean. Wipe off the oil from the copper, and with a dry piece of flannel dust the copper over with crocus powder, and polish with this until quite bright.