The Steamboat Agnes compound steam engine, very likely from a launch belonging
to a man-of-war in the Swedish navy, viewed from starboard side.
Details of the Joy's valve-gear are hard to distinguish on this picture.
The steam engine viewed from port.
The steam chests and the slide valve rods are visible on the picture.
The brass cylinder between the steam engine and the steering wheel is a heat
exchanger, exhaust steam heats feedwater before the steam leaves through the