قراءة كتاب Life of Richard Trevithick, Volume II (of 2) With an Account of His Inventions

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Life of Richard Trevithick, Volume II (of 2) With an Account of His Inventions

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Trevithick Francis

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The Project Gutenberg eBook, Life of Richard Trevithick, Volume II (of 2), by Francis Trevithick, Illustrated by W. J. Welch

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Title: Life of Richard Trevithick, Volume II (of 2)

With an Account of His Inventions

Author: Francis Trevithick

Release Date: August 19, 2014 [eBook #46634]

Language: English

Character set encoding: ISO-8859-1

***START OF THE PROJECT GUTENBERG EBOOK LIFE OF RICHARD TREVITHICK, VOLUME II (OF 2)***

E-text prepared by Chris Curnow
and the Online Distributed Proofreading Team
(http://www.pgdp.net)
from page images generously made available by
Internet Archive
(https://archive.org)

Note:

Images of the original pages are available through Internet Archive. See https://archive.org/details/lifeofrichardtre02trevrich

LIFE
OF
RICHARD TREVITHICK,

WITH AN ACCOUNT OF HIS INVENTIONS.

By FRANCIS TREVITHICK, C.E.

ILLUSTRATED WITH ENGRAVINGS ON WOOD BY W. J. WELCH.

VOLUME II.

LONDON:
E. & F. N. SPON, 48, CHARING CROSS.
NEW YORK:
446, BROOME STREET.

1872.

LONDON: PRINTED BY WILLIAM CLOWES AND SONS, DUKE STREET,
STAMFORD STREET AND CHARING CROSS.

CONTENTS OF VOLUME II.

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	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
CHAPTER XIX.
Pole Steam-engine.
Return to Cornwall, 1810--Wheal Prosper pole vacuum engine, 1811--Cylindrical boilers, 1811--Steam pressure, 100 lbs.--Duty of engine, 40 millions--Expansive working, 1811--Herland high-pressure pole puffer, 1815--Steam pressure, 150 lbs.--Boiler making--Comparison with Watt's engine--Blue-fire--Steam--Patent specification--Steam-ring stuffing box--Engines in Lima--A 33-inch pole-puffer more powerful than a 72-inch Watt engine--Description of pole engine and boilers--Trevithick's calculation--Trial of Herland engines--Steam-cushion--Power of the pole-engine--Defective workmanship--Sims examines the pole-engine--Opposition from shareholders--Defective boilers--Challenge to Woolf--Davies Giddy's opinion--First cost, and cost of working one-third of the Watt engine--Meeting of opposing shareholders--Duty of the high-pressure steam pole puffer-engine, 1816--Comparison with the Watt engine--Combined high-pressure pole and cylinder for expansion--Wheal Alfred Watt engine converted to high pressure--Wheal Chance combined engine--Mr. Michael Williams's opinion--Woolf and Trevithick	69-113
CHAPTER XX.
The Watt and the Trevithick Engines at Dolcoath.
Early steam-engines--Semicircular boiler, 1775, net power 7 lbs. on the inch--Watt's statement in 1777--Engines in Dolcoath--Watt's engine, 1778--Watt's engine at Herland, 1798--Trevithick's tubular boiler, 1799--Reconstruction of the Carloose 45-inch, 1799--Gross and net power of engines--Comparison of Newcomen, Watt, and Trevithick engines--Boiler explosion, 1803--Strong rivalry with Watt--Locomotive at Coalbrookdale, 1803--Watt's proposed locomotive--Competition in Wales--Numerous high-pressure engines, 1803--Patent difficulty--Watt's opposition, 1804--Government inquiry--Competitive trials in Wales--Tramway locomotive, 1804--The bet--Opposition because of saving of labour--Worcester engine--West India Docks engine--High-pressure steam condensing engines--One or two cylinders for expansion--Sirhowey boilers--Mr. Homfray's opinion of the Watt opposition--Mr. Whitehead makes engines in Manchester--Cylindrical tubular boiler in Wales for large engines, 1805--Watt contests at Dolcoath, 1805--Steam-blast--Superiority of high-pressure whim-engines--Proposed boiler for the large pumping engine, 1806--Steam pressure--The Watt boiler--Comparison of size of fire-place and coal used--Dredger contract--Theory of

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