Denis Papin, French scientist, 1689.
© Science Museum / Science & Society Picture Library
Oil painting dating from the 1850s, after an original oil painting of 1689 by Johann Engilhard in the University of Marburg, Germany, showing Papin holding a book open at a folding plate featuring a diagram of his 'digester'. In 1675, Papin (1647-1712) went to London were he worked with Robert Boyle (1627- 1691) and invented the forerunner to the presure cooker, the 'steam digester', which was used to soften bones. He also made a working model of an atmospheric condensing steam engine.