  In this paper we first show that, there exists a precise mechanical analogue
for the one-dimensional version of Schrodinger's original 4th-order,
real-valued matter-wave equation. It is a composite, flexural-shear beam
supported on distributed elastic springs. Nevertheless, in spite of this
finding, this paper shows that it is not possible to construct a physically
realizable mechanical analogue for Schrodinger's 2nd-order, complex valued
matter-wave equation which yields lower eigenvalues; therefore, lower energy
levels than these predicted with his original 4th-order, real-valued
matter-wave equation.
