The United States system of naval administration has progressed successively, and without breach of legislative continuity, from the simple rudimentary organ, the one man, in whom all functions as well as all responsibility were centered, through the phase of a complex organ with aggregate functions and responsibilities, defined, but still undifferentiated, into an organization elaborate in form, if not final in development. The process has been from first to last consistent in principle. The sole control and single responsibility of the Secretary—the representative of the President—have been preserved throughout, and all other responsibility is, and has been, not only subordinate to him but derivative from him, as a branch derives its being from the root. Moreover, consistency has also been maintained in restricting the administration thus evolved to the civil function which it essentially is. From the first departure, in the institution of the Board of Commissioners, to the present time, it has not had military authority properly so-called. It has had necessary authority in matters pertaining to a military establishment, but it has had no direction of activities in themselves essentially military; that has remained with the Secretary, and is by him transferred only to officers properly military in function. Finally, the principle of particular responsibility has been strictly followed. Within the limits of the duty assigned, the corporate responsibility of the Board in its day was, and the individual responsibility of each bureau chief now is, as certain and defined as that of the Secretary.