The Evolution of the Parsons Steam Turbine. an account of experimental research on the theory, efficiency, and mechanical details of land and marine reaction and impulse-reaction turbines; and on the efficiency of screw propellers, electric generators, and mechanical speed-reduction gearing driven by steam turbines. a record of progress in the applications of steam turbines in propelling ships, driving electrical machines, air blowers, compressors, fans and pumps, and in utilising exhaust steam from other engines. a description of the manufacture of turbines, and of the works of Messrs. C.A. Parsons and Company, Heaton, and of the Parsons Marine Steam Turbine Company Limited, Wallsend-on-Tyne