Nicholas Roosevelt (inventor) 74-gun ships. In 1797, with Robert R. Livingston and John Stevens, he agreed to build a boat on joint account, for which the engines were to be constructed by Roosevelt, and the propelling agency was to be that planned by Livingston. The experiment failed, the speed attained being only equivalent to about in still water. On September 6, 1798, Roosevelt described and earnestly recommended to Livingston a vertical wheel, which is the first practical suggestion of the combination that made steam navigation a commercial success, although four years later Robert Fulton believed that chains and floats were alone to be
History of the United Kingdom during the First World War the first time since the Napoleonic Wars, the population of the British Isles was in danger of attack from naval raids. The country also came under attack from air raids by zeppelins and fixed-wing aircraft, another first. The Raid on Yarmouth, which took place in , was an attack by the German Navy on the British North Sea port and town of Great Yarmouth. Little damage was done to the town itself, since shells only landed on the beach once German ships laying mines offshore were interrupted by British destroyers. One British submarine was sunk by a mine as it