I spent most of yesterday travelling between Austin and College Station, but I did manage to get a little bit of research in. I'm looking for other experiments related to Hirsch's theories we can do in conjunction to the search for H-rays. One of the measurable predictions of Hirsch's theory is a change in the coefficient of sliding friction when a material enters it's superconducting state. All about friction [6] New to the lab book? Scroll to the bottom for background and a summary of the experiment. Hirsch mentions [1] that a finding of reduced friction in superconductors might be evidence in support of his hole theory of superconductivity. Furthermore, the electronic layer outside the surface is likely to affect the friction properties of the superconductor, by providing a ‘lubricating layer’ on top of which another material would slide. As a matter of fact, an abrupt drop in sliding friction between a lead surface and solid nitrogen has be...