CHAPTER XXVII.

HEATING APPARATUS--MARINE STEAM-ENGINES--REFORM COLUMN.

Ill health, 1830--Hot-house boiler--Heating rooms--Discharging coal-ships by steam--Hot-water stoves for France--Patent for heating apparatus, 1831--Marine portable engines--Boat propeller--Wheal Towan--Discharging coal by steam at Hayle--Proposal to the Common Council of London--Every vessel to carry a steam-engine--Mr. George Rennie--Proposal to the Admiralty--Surface condensation--Locomotives supplying their own feed-water--Petition in Trevithick's favour--Davies Gilbert's suggestion--His comparison of the Watt and Trevithick engines--Maudslay on Trevithick's proposals--Patent of 1832--Superheating steam--Cylinder placed in flue from boiler--Expansive steam--Tubular boiler--Water propulsion--Superheating and surface condensation for locomotives--Detail of engine--Proposal to send steamboats to Buenos Ayres--Waterwitch Company--Messrs. Hall and Sons--Hall's condenser--Rennie and the Admiralty--'Syria' steamboat--Compound engines--Watt on high-pressure steam--Trevithick on compound engines--Tubular boiler and variable blast-pipe--Refusal of Trevithick's petition to Government--Ill health--Davies Gilbert's statement to Spring Rice--Meeting on proposed Reform Column--Trevithick's description--Means of ascent and descent--Placed before the King--Death--Funeral--His last letter Page 363-396

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.