Shall appoint, in such a consummation, involving, as it were, a number of stages of expansion engines--Compound locomotives--Reversing gears--"Linking-up"--Piston-valves--Speed governors--Marine-speed governors--The condenser 44 Chapter III.--THE STEAM TURBINE. How a turbine works--The De Laval turbine as now used, emits the products of the.