between the simple tribology data and that of the intcrlcavcd books providcs confidcncc thc modol. Fur thermore, it is noteworthy that the classic phonebook cally s of probes a broad range of loads that typi and a nearly sixtold change demonstration decades, in the coefficient of kinetic frictionz The self similar Eq. (3), suggests that with T 0.01 N, and the best fit values of Au for each experiment see Fig. 3), all data should collapse when normalised ap