times, p. 56—Ships with many banks of oars, p. 57—Mediæval ships, p. 59—Modern sailing ships, p. 60—The sailing record of The Sovereign of the Seas, p. 60—Early attempts to invent a steamboat, p. 63—Robert Fulton's Clermont, p. 64—The steamboat of Blasco de Gary, p. 66—The Charlotte Dundas, p. 67—The steamboat invented by Col. John Stevens, p. 68—Fulton designs the Clermont, p. 71—The historic trip of the Clermont up the Hudson, p. 71—Sea-going steamships, p. 73—Ships built of iron and steel, p. 74—The Great Eastern, p. 76—Principal dimensions of the Great Eastern, p. 78—Twin-screw vessels, p. 80—The triumph of the turbine, p. 81—The Lusitania and Mauretania, p. 82—Submarine signalling, p. 83—The rescue of the Republic, p. 84—How the submarine signalling device works, p. 86—The Olympic and Titanic, p. 90—Liquid fuel, p. 90—Advantages and disadvantages of liquid fuel, p. 91.

CHAPTER III

SUBMARINE VESSELS

Slow development of submarine navigation, p. 93—The first submarine, p. 94—Description of David Bushnell's boat, p. 94—Attempts to sink a war vessel during the American Revolution, p. 97—Robert Fulton's experiments, p. 98—The attack on the Argus by Fulton's submarine, p. 100—The attack upon the Ramilles in 1813, p. 102—A successful diving boat, p. 103—The sinking of the Housatonic, p. 104—Recent submarines and submersibles, p. 105—The Holland, p. 106—The Lake type of boat, p. 108—Problems to be overcome in submarine navigation, p. 109—Present status of submarine boats, p. 111—The problem of seeing without being seen, p.