href="@public@vhost@g@gutenberg@html@files@35916@[email protected]#Page_248" class="pginternal" tag="{http://www.w3.org/1999/xhtml}a">248; Nicholas Roosevelt, 1798, 250; Robert Fulton, 1802, 251; Fulton’s Torpedo-Vessels, 1801, 252; Fulton’s First Steamboat, 1803, 253; the Clermont, 1807, 257; Voyage of the Clermont to Albany, 259; Fulton’s Later Steamboats, 260; Fulton’s War-Steamer Fulton the First, 1815, 261; Oliver Evans, 1804, 263; John Stevens’s Screw-Steamer, 1804, 264; Stevens’s Steam-Boilers, 1804, 264; Stevens’s Iron-Clad, 1812, 268; Robert L. Stevens’s Improvements, 270; the “Stevens Cut-off,” 1841, 276; the Stevens Iron-Clad, 1837, 277; Robert L. Thurston and John Babcock, 1821, 280; James P. Allaire and the Messrs. Copeland, 281; Erastus W. Smith’s Compound Engine, 283; Steam-Navigation on Western Rivers, 1811, 283; Ocean Steam-Navigation, 1808, 285; the Savannah, 1819, 286; the Sirius and the Great Western, 1838, 289; the Cunard Line, 1840, 290; the Collins Line, 1851, 291; the Side-Lever Engine, 292; Introduction of Screw-Steamers, 293; John Ericsson’s Screw-Vessels, 1836, 294; Francis Pettit Smith, 1837, 296; the Princeton, 1841, 297; Advantages of the Screw, 299; the Screw on the Ocean, 300; Obstacles to Improvement, 301; Changes in Engine-Construction, 302; Conclusion, 303.

    CHAPTER VI. The Steam-Engine of To-Day.   The Period of Refinement—1850 to Date 303   Condition of the Steam-Engine at this Time, 303; the Later Development of the Engine, 304; Stationary Steam-Engines, 307; the Steam-Engine for Small Powers, 307; the Horizontal Engine with Meyer Valve-Gear, 311; the Allen Engine,