In the days of steam, power was produced by huge machines. If you needed a more powerful machine, you just made it bigger. The huge wheels and pistons that resulted were most impressive. The Henry Ford has quite a selection of these old steam engines of various designs. The efficiency improved as they introduced multiple phases to the machines to recover more work from the output of the engine. The big beams and pistons remained a theme, though. The large brick structures and the associated metalwork have been nicely preserved and displayed.