TOOLS 85 THE BLANCHARD LATHE 96 SAWING MACHINES 98 RAILWAYS 101 THE METROPOLITAN RAILWAYS 114 THE PACIFIC RAILWAY 116 INCLINED RAILWAYS 125 STEAM NAVIGATION 129 RIVER AND LAKE STEAMBOATS OF AMERICA 144 SHIPS OF WAR 149 FIRE-ARMS 169 THE MILITARY RIFLE 178 RIFLED CANNON 190 MACHINE GUNS 218 TORPEDOES 227 SHIP CANALS 249 THE SUEZ CANAL 251 THE MANCHESTER SHIP CANAL 262 THE NORTH SEA CANAL 271 THE PANAMA AND NICARAGUA CANAL PROJECTS 272 IRON BRIDGES 276 GIRDER BRIDGES 280 SUSPENSION BRIDGES 284 CANTILEVER BRIDGES 291 THE TOWER BRIDGE, LONDON 297 THE GREAT BROOKLYN BRIDGE 303 PRINTING MACHINES 305 LETTERPRESS PRINTING 306 PATTERN PRINTING 321 HYDRAULIC POWER 324 PNEUMATIC DISPATCH 340 ROCK BORING 349 THE MONT CENIS TUNNEL 351 ROCK-DRILLING MACHINES 355 THE CHANNEL TUNNEL 364 THE ST. GOTHARD RAILWAY 371