3588302 James Watt in his Glasgow workshop improving on Thomas Newcomen\'s 1712 Newcomen steam engine with his Watt steam engine in 1781, from Les Merveilles de la Science, pub.1870. by French School, (19th century); (add.info.: James Watt in his Glasgow workshop improving on Thomas Newcomen\'s 1712 Newcomen steam engine with his Watt steam engine in 1781. James Watt, 1736 -1819. Scottish inventor, mechanical engineer and chemist. From Les Merveilles de la Science, published 1870.); French, out of copyright.