  We consider the problem of how to determine the force laws in an amorphous
system of interacting particles. Given the positions of the centers of mass of
the constituent particles we propose a new algorithm to determine the
inter-particle force-laws. Having $n$ different types of constituents we
determine the coefficients in the Laurent polynomials for the $n(n+1)/2$
possibly different force-laws. A visual providing the particle positions in
addition to a measurement of the pressure is all that is required. The
algorithm proposed includes a part that can correct for experimental errors in
the positions of the particles. Such a correction of unavoidable measurement
errors is expected to benefit many experiments in the field.
