Mist might be nice indeed. As our country is very flat, water power is rare, and these medieval guys had a smart way to divert small streams along altitude lines until the gathered water was enough to power a wheel (or three [ there's another one hardly visible] at turns, as I think that's what the other wheels are for, different machinery attached). They were used to power hammers to grind paper mash for paper making. Later they were used for grinding wheat, and even later for making electricity.
What's the numbers you're rattling off, Bobby? You're speaking in riddles
