The Steam Engine
One of the 2 important parts is the boiler which contains water to
be boiled.
The second important part of a steam engine are the pistons. In
James Watt's engine the pistons are moved by condensing water
which causes vacuum which is created on both sides of the
piston to make it move back and forth.
Okay, okay I get the point.
The End
Used materials
http://en.wikipedia.org/wiki/Steam_engine
http://et.wikipedia.org/wiki/Aurumasin
http://
science.howstuffworks.com/transport/enginesequipment/steam.htm
http://inventors.about.com/library/inventors/blsteamengine.htm
Some shiznits I just made up