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["WILLIAM JONES" <billj AT harborside.com>]

http://en.wikipedia.org/wiki/Minto_wheel
You might notice that the animation as done has some of its torque provided 
by buoyancy!  When the chamber rounds the bottom, it's already become 
somewhat hollow, causing an upward buoyant force on it!
You can easily use the animation to picture a Jones wheel.  Imagine that one 
chamber is a blackbottle and the opposite one is a flexible float, and there 
are at least twice as many, so that there's always at least one float in the 
fourth quadrant, submerged but rising.  Suppose that the dark color of floats 
in the second quadrant represents air heated by the sun; likewise, that the 
light color of the rising ones represents an inflated float.