“5. The organization of the Invalid Corps; and, “6. The operation of the several departments of the Quartermaster General, Commissary General, Paymaster General, Chief of Engineers, Chief of Ordnance, and Surgeon General. “It has appeared impossible to make a valuable summary of this report, except such as would be too extended for this place, and hence I content myself by asking your careful attention to the report itself. “The duties devolving on the Naval branch of the service during the year, and throughout the whole of this unhappy contest, have been discharged with fidelity and eminent success. The extensive blockade has been constantly increasing in efficiency, and the Navy has expanded; yet on so long a line it has so far been impossible to entirely suppress illicit trade. From returns received at the Navy Department, it appears that more than one thousand vessels have been captured since the blockade was instituted, and that the value of prizes already sent in for adjudication, amounts to over thirteen million dollars. “The naval force of the United States consists, at this time, of five hundred and eighty-eight vessels, completed and in the course of completion, and of these seventy-five are iron-clad or armored steamers. The events of the war give an increased interest and importance to the Navy, which will probably extend beyond the war itself. “The armored vessels in our Navy, completed and in service, or which are under contract and approaching completion, are believed to exceed in number those of any other Power. But while these may be relied upon for harbor defence and coast service, others, of greater strength and capacity, will be necessary for cruising purposes, and to maintain our rightful position on the ocean.