An executive of the right type will soon realize as he uses the curves that he must do the constructive work himself, and that the curves will really have more effect in changing the procedure in his own office than in changing the detailed routine in the departments of his various subordinates.

One of the first tasks confronting any modern executive is that of training, on the one hand, his board of directors and executive committee, and on the other hand, his various department heads and their subordinates, to read curves accurately so that the facts presented may be intelligently grasped and applied to the benefit of the business as a whole. It is unfortunate that so many men serving to-day on boards of directors and in executive positions of large businesses are not able to read even the simplest curve with any real grasp of the facts portrayed. Engineers and other trained men who have real facts available are tremendously handicapped in presenting the facts if it is not feasible to use the graphic method of presentation. A man prepared to show his data in the form of curves, for example like Fig. 157 or Fig. 159, feels that he would have an almost hopeless task to convey the vital facts if only spoken words might be used. The writer ventures to predict that within ten years practically all corporation directors and executives will be able to interpret curves with satisfaction to themselves and with great benefit to their business. The executive who cannot read curves will in the near future be the exception rather than the rule.