A caisson is a machine for working under water.
Meyers Konversations-Lexikon is a German encyclopedia.
Rise, German engineers. Rise.
Dive, German engineers. Dive.
Image found at Wikimedia Commons.
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What were the caissons as in “the caissons, go rolling along”? Cannons?
So is it just a tube?
Sam
I guess it must be – a tube with a closed end that things go up and down inside, anyway.