A short Popular Mechanics item describing an English machine that opens and cleans raw cotton by subjecting it to rapid vibration in an air current. It explains the perforated drum, the small rotating brush that turns the drum and keeps its holes clear, and the rotor with spiraled blades that agitates the cotton. Air blown through the drum carries the opened cotton to a condenser, and an exhaust fan removes the dust. One illustration shows the machine opened up.