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

I really should be more careful.  Last night I was hurrying.
The mechanism behind the Minto wheel is nothing like what I described.  It's 
really an endlessly rotating "dunking bird" with a tube that conveys liquid
to the upper chamber from a lower one on the opposite side.  Instead of a 
cool head whose vacuum sucks the propellant upward, the Minto wheel
has a hot bottom chamber inside which pressurized vapor pushes the propellant 
upward.  It's actually a pretty cool idea.
But making one is totally beyond my capability.