Attached are photo`s of the rear side of the old German Charlottental plant, if there is anyone that can tell how this process with the copper `pots` worked, from the pots the gravel went to a jig please let me know.
I think Gordon might know!
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I found out what the pots are, for those of you that want to know they are called Schiechel pots and are used to concentrate the heavier material like diamonds to the centre of a mesh inserted in the top- or so I think still waiting for documentation on the ins and outs