| Show now new knowledge ao ledge about car couplers the idea that it was necessary nee essary to have a certain amount of I 1 loose play between the tha diw composing coir posing a long train in order to start tho the train easily had become by practice and theory almost as fixed in the minds of railway people as is the geometrical axiom that two parallel lines can nover never meet the theory was by starting sta aling one car first and so gan gaining ling a little inertia then the next carand so on it was made possible for an engine to ti start and haul a long train of a given weight when if there wore were no play the engine would bo be stalled and unable to start the train eat but the fallacy of the practice and the t theory was vas conclusively established during daring the remarkable series of car coupler exposi experiments made by the master car builders association at burlington Dur lington towa iowa this year during these trials it was diw demonstrated beyond all question that it required less power to start a train with all the couplings tight than to pull the train after the train was put in ili motion and the coupler committee camo to the conclusion that the coupler of the tha future ought to bo an approved form of the tha close hook stylo style scientific american |
