During the Civil War two vessels, the Monitor and the New Ironsides, appeared which have left lasting traces on all battleship construction since their day. The great fleet of monitors, “tin-clads,” “90-day gunboats,” “double-enders,” and the like, which preceded and followed them during those dark years, served their country well. With the ending of that war, in the internal task of reconstruction and development, our maritime power was neglected and our fleet dwindled away. Its _renaissance_ dates from the appointment of the first Naval Advisory Board in June, 1881. The growth since then has been so much a matter of national interest and pride that it needs no detailed recounting here; its results have been summarized previously herein. The sea-going personnel of the United States navy includes the line, medical, pay, and marine officers, the chaplains and warrant officers—a total on March 1, 1899, of 1589, with an enlisted force of 17,196 blue-jackets and 3166 marines. The officers who serve on shore are the naval constructors, civil engineers, and the professors of mathematics, a total of 69. Line officers are the commanders, navigators, gunners, and, by recent law, the engineers of our ships of war. Marine officers have charge of the policing of ships and shore-stations and of the guns of light calibre afloat. The duties of the remaining officers are indicated by their titles. The titles of line officers and their relative rank, as compared with that of officers of the army, are:— NAVY. ARMY. Admiral General. Rear-Admiral Major or Brigadier-General. Captain Colonel. Commander Lieutenant-Colonel. Lieutenant-Commander Major. Lieutenant Captain. Lieutenant Junior Grade First Lieutenant. Ensign Second Lieutenant. Line and marine officers and naval constructors are educated at the United States Naval Academy; all other officers are appointed from civil life. The Academy was founded in 1845 and is located at Annapolis, Md. The course comprises four years at the school and two years at sea on a naval vessel. The number of cadets at Annapolis is usually about 260.