An investigation has been made of the wear which occurs in depth to thin films of various magnetic oxide-filled polymeric resins bonded to 1.2 mm thick polyester films (Mylar) when the resin surfaces are in sliding contact with an iron-nickel base alloy and a sintered metallic oxide. It is shown that the experimentally determined number of passes required to wear through each resin, correlated well with the theoretical number calculated in terms of the engineering model for wear1. A similar correlation was found between the experimental and the theoretical when the surf aces were lubricated with mono and multilayers of lauric acid which were adsorbed on the surfaces from a dynamic vapor phase. The relationship between the static coefficient of friction and adsorption curves of the film thickness vs. the resin surface temperature is briefly discussed for two samples. © 1965.