In 1675, he first visited London, where he worked with Robert Boyle from 1676 to 1679, publishing an account of his work in "Continuation of New Experiments" (1680). During this period, Papin invented the "steam digester," a type of pressure cooker with a safety valve. He first addressed the Royal Society in 1679 on the subject of his digester, and remained mostly in London. As a Huguenot, Papin found himself greatly affected by the increasing restrictions placed on Protestants by Louis XIV of France and by the King's ultimate revocation of the Edict of Nantes in 1685.