We have exposed a detector, similar to the one used on the HEAO Heavy
Nuclei Experiment {Binns, et al., 1981) to beams of _(26)Fe, _(57)La, _(61)Ho and
_(79)Au at the LBL Bevalac. We will report on the deviations from z2
scaling for the signals in the ion chambers and the Cherenkov counters
as a function of energy and Z. These deviations are definitely small and
imply an error of less than one charge unit in the charge
determinations used in the Heavy Nuclei Experiment (Binns, et al.,
1989)
