Chapter XVII: Various Inventions

Stone-crushing mill, 1804--Portable puffer, 1805--Staffordshire
potteries--Engine for South America--Diversity of steam
appliance--Numerous high-pressure engines--West India Dock
locomotive--Engines at Newcastle--Blacklead lubricator--Engines in
Wales--Mine engines on wheels, 1804--Engines in London--Engines to be
sold in market towns--Blast-furnaces--Aërated steam-boiler--St. Ives
Breakwater--Dolcoath blast copper furnace--Davies Gilbert's opinion of
the aërated steam-boiler--Trevithick's advice to a brewer--Agricultural
engines--West India engines--Thrashing engine--Horizontal
engines--Expansive steam--Cold surface condenser--Air-pump--Expansive
cam--Fire-bars--Comparison with Watt's engine--Stone-boring engine,
1813--Plymouth Breakwater, reduction in cost--Locomotive engine,
1813--Stone splitting--New method of stone boring, 1813--Screw bit,
1813--Falmouth Harbour--Exeter Bridge--Engine at Lima--Proposed train
from Buenos Ayres to Lima--West India portable engine Page 1-35

CHAPTER XVIII.

AGRICULTURAL ENGINES; LOSS OF PAPERS.

Sir Christopher Hawkins's thrashing machine, 1812--Report of three
wise men--Cost of horse and steam power--Wheal Liberty engine--Sir
John Sinclair and the Board of Agriculture--Cost of engine--Power of
engine--Welsh locomotive--Trevithick on steam agriculture--West Indies
engine--Horse-power--Trevithick on patents--Engines in charge of
labourers--Teapot--Detail of agricultural engine--Lord Dedunstanville's
thrashing machine--Plymouth Breakwater locomotive--Wheal Prosper
engine--Wheal Alfred engine--Steam-plough--Cultivation of
commons--Combined steam-tormentor, narrower, and shoveller--Mr.
Rendal's thrashing machine--Cost and work performed by thrashing
engines--Their durability--Bridgenorth engine--Trevithick's drawings
light the tires 36-68