arranged by the Hydraulic Plant and Machinery Group of the Institution of Mechanical Engineers. arranged by the Steam Plant Group of the Institution of Mechanical Engineers. sponsored by the Tribology Group of the Institution of Mechanical Engineers. arranged by the Thermodynamics and Fluid Mechanics Group of the Institution of Mechanical Engineers, 3rd-5th April 1973. sponsored by The Tribology Group of The Institution of Mechanical Engineers. organised by the Power and Management and Design Divisions of the Institution of Electrical Engineers. organised by the Yorkshire Branch and Fluid Separation Processes Group of the Institution of Chemical Engineers. organised by the Electronics Division of the Institution of Electrical Engineers. Organised by the Electronics Division of the Institution of Electrical Engineers. organised by the Computing and Control Division of the Institution of Eletrical Engineers.