caption: The image shows a black and white drawing of a steam engine, with its various components labeled. The engine is composed of a cylinder, a piston, and a cylinder head, all connected by a series of pipes and valves. The cylinder head is connected to the piston and valves, which are used to control the flow of steam through the engine. The diagram also shows the various components of the engine, such as the pistons, valves, and other components.