12 inch centrifuge sounds like the old 'milk and cream seperator'. Great fun as a kid.
Put a little tab of cardboard in the spindle and wind the thing up and suddenly the cardboard lets go and fly's up into the air like a rocket powered helecopter.
The winding lever was because it was hand powered and the spindle normally had a bunch of bowls on it for separating the cream out.
Near where I live there's Gold mine remains from last century and early this one.
Stampers for quartz, big centrifuges. Little huts and buildings, water races and old water pipes.
When Gold busted in the 'States, miners travelled here to try it out. Lots of Chinese too.
A lot of its accessible by motorbike and when Dad met up with a old workmate who had brought a Honda XR250.....
Next thing we were riding them too. Often had 10-15 people all on Hondas riding all sorts of trails in all sorts of places.
For you 'lord of the rings' people. Google image 'Arrow river - Arrowtown'. That's a Gold town and access point to many more Gold towns, also a LOTR film location spot, there's a huge wall of water rushes down that valley in the film.
Funny because in real life there's no way it could happen, and if it did, it would wipe out the township 200yards behind it. (A friend worked on that movie, and others Sir Peters done)
You can pan there and get specks, and dust. Most of the Golds gone now. They used to get a Ounce a day.
A good panner will get a ounce a week in the best places. No real nuggets at all there.
Funny story, a friend & I went there once, I had pan and sluce and such. The big joke was that he was going to find Gold before I did. (He was going there to hunt possums instead)
I'm setting up my sluce just after we get there and he says "Found it, there's some Gold"
And I'm like "WHAT! Already?"
"Yeah, just right there" and points.... At a broken cellphone in the middle of the stream....
Yeah, that's Gold. And I gotta admit it too.
But... Here's a YouTube of a small shaker table.
The reason why I made this post.
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