The Jenny was the first intermittent spinning process and was developed by James Hargreaves in 1764, who called it the Spinning Jenny. A mechanism operated by hand, a single Jenny imitated the actions of about ten spinners each using an single spinning wheel. Richard Arkwright then invented the Water Frame Spinning Machine in 1769, which was followed by a development in 1779 by Samuel Crompton called the Mule, a similar machine to the Jenny but with many more spindles. See spinning and water frame.