A one-page dictionary entry defining the spinning mule, a machine that draws and twists roving into yarn and winds it onto spindles as cops. It describes the stationary and movable parts and the English mules by Dobson and Barlow shown at Philadelphia, with their spindle counts, gauges and yarn counts. It also explains an improved headstock mechanism that replaces the cam-shaft with a long lever making three changes. An engraving of a mule pulley stand (Fig. 1787) accompanies the text.