Experiments (mind or hands-on) in this area should be preceded by at 
least a working knowledge of the thermodynamics involved.

Here's an interesting and possibly even useful presentation of 
Carnot's original work. Fascinating as a historical glimpse even if 
one isn't intending to attempt to break the laws of physics :-)

    http://www.history.rochester.edu/steam/carnot/1943/



        RM

Ref from Ken Mardle.

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