Standing side by side; of course used. AUTOMATIC SIGNALLING. To reduce expense, and increase the range of expansive working--Compound engines--Arrangement 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 nozzle at 200 lbs. Per square inch, in addition.