Show BAD ROADS COSTLY TO AUTO RUBBER RUBBE How tow much do poor roads add to tire the costs An answer has just been given given given en by Prof Proto S S Steinberg ot or the National Research Councils Council's high high- highway highway highway way research board through a 0 series of o test tests I In which an in auto auto- automobile automobile automobile mobile was over different type types of ot roads It a was found says Popular Sil- Sil Science Silence Science ence Monthly that concrete or brick roads caused the least tire wear the loss In weight eight of each tiro being one ono ounce for tor a mile mile run Tho The wear caused by gravel graYd road roads was WI from two to seven seyen times a as great while that on macadam was from t tar tan r to tiny fifty times The tests proved that the th wear on front tire tires Is 19 from 60 BO to 76 16 per cent less than on rear tires 00 |