Vessels of War less complex in their Construction than Merchant Vessels. The United States Navy behind the age. Ships of the Line expensive and inefficient. Frigates and Sloops-of-War. War Steamers.Treatise on Marine and Naval ArchitectureGriffiths, John Willis 1856 – 100% + First ◀ of ► Last Wide Rotate Funding for digitization provided by The Andrew W. Mellon Foundation