Auto Races Help Automotive Business i " Motor racing has accomplished many valuable improvements for atf-tomotive atf-tomotive industry. Among other thing? I that racing has taught the automo-bilc automo-bilc manufacturer are tho following; The advantages of the streamline body; how to mako reliable pneumaCr Ic tires; how to develop demountable rims and detachable wheels; how use wire wheels to the best advantage .how to make economical carburetors; the importance of correct distribution of weight; how to build reliable steering steer-ing gear.