2:  Different types of engines.

You can see many different types of engines; in the first glance they look almost the same.
The basic parts are the same, like a horizontal coal fired boiler, chimney, 4 wheels and they are self moving.
The differences are the type of work they do and the conditions whereunder they work which determines the specific design of an engine.
Some examples of engines that are highlighted on this website are:

- the (agricultural) traction engine.
- the ploughing engine.
- the road engine.
- the crane engine.
- the showmans engine.
- the steam tractor.
- the roadroller.
- the steam waggon.