Show I In Railway Brake Shoe Laboratory I 4 r OO O I Pur 35 years rs investigations of ot tIle the properties of brake shoes looking t to- to toward I ward the lie discovery el of better metal compounds than now used have bave been un- un unI under un der way The University of ot Illinois has bas been carrying on such euch Investigations Investigation I for tor many years ears In Its shoe brake-shoe laboratory where there thero Is a n machine shown show show-In In the picture which measures and null records the friction of ot brake shoes an d enl enables the Investigators to measure the weight of ot metal worn away In the performance of oC a n certain amount of ot braking work ork There are brake brak e shoes In service Ice on ou American steam roads and Is spent annually 7 In renewing them I |