ILLUSTRATIONS TO VOLUME II. PAGE AËRATED STEAM-BOILER 7 ROCK SPLITTING 25 STEAM THRASHING ENGINE 37 AGRICULTURAL MACHINE 58 WHEAL PROSPER HIGH-PRESSURE STEAM POLE-ENGINE 70 CYLINDRICAL HIGH-PRESSURE STEAM-BOILERS 71 EXPANSIVE STEAM POLE-ENGINE 81 CARN BREA CASTLE 147 TREVITHICK'S DOLCOATH ENGINE OF 1816 168 TREVITHICK'S DOLCOATH BOILERS OF 1811 169 STEAM DIAGRAM 185 'LA BELLE MACHINE' 190 CARRIAGE-WHEELS 207 WINDING ENGINES 208 PENZANCE IN OLDEN TIME 228 MARKET, JEW STREET, PENZANCE 243 MULE TRACK FROM LIMA TO CERRO DE PASCO 258 MAP OF COSTA RICA MINES 260 GUN-CARRIAGE 285 DUTCH PUMPING ENGINE 298 MOUNT'S BAY 318 PARTIAL CONDENSATION ENGINE 332 TUBULAR BOILER AND CONDENSER 339 BOTTLE-NECK BOILER 357 CAPTAIN DICK AND CAPTAIN ANDREW 361 HOT-WATER ROOM-WARMER 364 PATENT HEATING APPARATUS 366 DUCK'S-FOOT PADDLE 369 MARINE ENGINE AND BOILER 380 COMPOUND MARINE ENGINE 385 REFORM COLUMN IN DETAIL 391 GENERAL VIEW OF REFORM COLUMN 393 LIFE OF TREVITHICK. CHAPTER XVII. VARIOUS INVENTIONS. "About 1804 Captain Trevithick put up in Dolcoath Mine a stone-crushing mill, having large cast-iron rollers, for breaking into small pieces the large stones of ore; it was spoken of as the first ever used for such a purpose; the same form of crusher is still used in the mines. It caused a great saving compared with breaking by a hand hammer."[1] "I saw at the Weith Mine in 1805 a portable high-pressure engine, made by Captain Trevithick.