It is the never-ceasing marvel concerning this man that age cannot wither nor custom stale his work. After many a weary day's study the investigator awakes from a dream of greatness to find that he has only worked out a new proof for a problem that Taylor has already solved. Time study, the instruction card, functional foremanship, the differential rate piece method of compensation, and numerous other scientifically derived methods of decreasing costs and increasing output and wages these are by no means his only contributions toward standardizing the trades. (p. 122)