An 18th-century article describing John Antis's improvement to the common spinning wheel, which moves the bobbin backward and forward so the thread need not be shifted between staples on the flyer. It reproduces his introductory letters and a mechanical description of the gearing: a pinion on the great wheel axle, a 97-tooth wheel, an oblique wire ring, a lever, a sliding bar and a weight. An engraved plate with lettered parts accompanies it. The invention won a premium of twenty guineas from the Society for the Encouragement of Arts, Manufactures, and Commerce.