The atmospheric engine invente by Thomas Newcomen in 1712, today referred to as a Newcomen steam engine (or simply Newcomen engine), was the first practical device to harness the power of steam to produce mechanical work. Newcomen engines were used throughout Britain and Europe, principally to pump water out of mines, starting in the early 18th century. James Watt's later engine was an improved version. Although Watt is far more famous today, Newcomen rightly deserves the first credit for the widespread introduction of steam power.