Papers of Kenneth Langstreth Johnson FRS, engineer Papers and correspondence of the engineer Kenneth Johnson. The collection includes professional correspondence, as well as Johnson's research notes and teaching materials. Some of the material relates to Johnson's publications, as well as editorial work including refereeing of other scientists' work. Some personal material also covers Johnson's early employment and his membership of the Royal Society, the Royal Academy of Engineering, and the Mechancial Institute of Engineers. There is also material relating to consultancy work undertaken by Johnson in the latter stages of his career, including with British Rail. 1949-2010s