This article deals with a few aspects of the management of the Southern Pacific Company under E. H. Harriman from his assumption of control of the road in 1901 until his death in 1909. This was a short period in the railroad's history and yet it was long enough to supply ample illustration of the methods which Harriman, a former Wall Street broker, employed to attain great success in the administration of this huge railroad system. It exemplifies the truth that a big job must be done by the coöperative work of many men, albeit with a strong man at the top. It shows the successful operation of a big business unit under a strong top-level organization which allowed for individual freedom and initiative at lower levels. It was the Harriman system, even more than Harriman, alone, that did so much for the Southern Pacific. And, then, we must not forget that some of the ideas which Harriman put into effect were nurtured by the former president, C. P. Huntington, who never found the opportunity to carry them out. But if Harriman did not largely conceive the policies and techniques and train the men, he merged them into a great concept of policy, organization, and management which he supported with his financial strength and his capacity as an administrator. The story of his administration of the Southern Pacific illustrates an important stage in the history of American railroad administration and, indeed, of this country's large-scale business administration in general.