So much is clear, that the keeping of the balance in the comprehensive machine process of industry is a matter of the gravest urgency if the productive mechanism is to proceed with its work in an efficient manner, so as to avoid idleness, waste, and hardship. The management of the various industrial plants and processes in due correlation with all the rest, and the supervision of the interstitial adjustments of the system, are commonly conceived to be a work of greater consequence to the community's well−being than any of the detail work involved in carrying.