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Date: Tue, 02 Sep 1997 13:16:22 EDT
From: David Bowman <dbowman@tiger.gtc.georgetown.ky.us>
Likewise, I think there is no great harm
in speaking of energy flow as long as it is recognized that energy, as such,
is not a physical thing or a substance, but the value of a particular
function (i.e. the Hamiltonian) of the microscopic dynamical observable
variables characterizing the system itself.