A side elevation drawing of a cross-compound steam engine taken from the Engineer was designed by Clark & Standfield for use in the dock supplied and built in the UK for the Mitsubishi Company of Kobe in Japan. The Pickering governor invented in 1862 controls the speed of the engine by metering the steam inlet valve. The speed of the engine will vary according to the load it has to drive at any instance in time. The objective of the governor is to maintain constant rotational speed at all conditions of load and is mounted above the steam inlet valve port. The steam in a compound engine is used twice. Firstly in a small diameter cylinder to produce power and then at the end of the return stroke the exhausting steam, now expanded, is passed to the second cylinder, with a larger diameter piston, to produce more power; it then being exhausted on the return stroke. The exhaust port is situated at the left of the engine. Valves, meter the steam at the correct time, in and out of the cylinders in sequence. This configuration of steam engine is unique in that the drive shaft is orientated vertically. [015] [016]