h a l f b a k e r y
You could have thought of that.
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This lava lamp has two bases connected by a
pyrex/plastic tube. Could be scalable to
larger size for a giant archway for a concert,
etc. See illustration.
Lava Tube illustration [ophello, Sep 27 2005, last modified Jan 10 2010]
||I'm a sucker for a pretty picture. Bun.
||You probably need some air space at the top to allow for expansion, but croissant. Especially for the giant concert version.
||I wonder if the lava would find its way to
the other side, or just fall back. Suppose it
would have some momentum towards the
other side, since it's floating in that
||A huge version would be plastic. Glass is
too fragile that big...
||Close the loop at the bottom, and light one side with
LED, the other with incandescent. It will tend to
produce a true circulation.