In summary, we have presented the results of a new experiment with many implications for the relationship between electronic structure and superconductivity in the stage 1 KHg-GIC's. The unique property of the experiment is that hydrogen doping produces the same effect on samples with very different initial properties, in contrast to many other methods of studying these compounds. A density of states model suggested by the hydrogen-doping results has been described. Extension of the hydrogenation studies to different stages and other compounds should prove to be of great interest.