  The physics of wavefunction collapse from Hilbert space to a classically real
spacetime, accompanied by wave-particle duality, is, fundamentally, reduction
of the complex psi to reality. We introduce new terminology for new physics.
The superposition sigma ~ psi + phi of system and apparatus is postulated. A
simple and obvious thing to test is the ensemble probability (Sect. 1).
Weinberg (2005) suggests three types of experiments for energy, position, and
momentum observable ensemble averages which should all be tested (Sect. 2 - 4).
This Reference is intended to serve as general background for the present paper
which is self-contained.
