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Wayne,
have fun with your next image. I'm glad you were enjoying the way your painter and tablet were working.
I finally came up with a better phrase. "the slice of pie shaped thing" that's object that I saw as protruding. Actually, the rust or the rivets looks cool.
It's just really great that you opt to share these images. Thank you.
Athena
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The pie shaped thing on front is a massive hinge to allow the ore to be dumped into a coke fired furnace to extract the copper from the rock and dirt.
Coke was shipped by sailing ship around the Southern tip of South America to California where it was hauled by wagon train to the mines in Jerome, AZ. This was truly an international operation.
So much for history.
That's what that pir shaped thing is.
Regards!
Wayne D
Arizona