  Certain transformations of isolated physical systems underlying various
conservation laws in physics are noted. As regards each of these
transformations, there is a theoretical action that is equivalent to a matched
physical action on the system. Evidence supporting this thesis is found in
experimental psychological research where results of various experiments allow
that the imagined rotation of an object is analogous to a physical rotation.
The conservation laws based on the transformations noted are theoretical or
mental in nature to the same extent that they are physical. When one of the
conservation principles noted is tested by carrying out the relevant
transformation on the system, this test is essentially one of the influence of
mental activity on physical reality.
