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CHAPTER VI.
Page
Mr. Watt's introduction to Dr. Black, and to Professor Robison-Dr. Black's history
of their friendship, and of Mr. Watt's improvements on the steam-engine-Dr.
Robison's history of his acquaintance with Mr. Watt--Account of his character,
abilities, dispositions, habits, and pursuits-Experiments on model of Newcomen's
engine-Invention of Separate Condenser, and further improvements on the
steam-engine
43
CHAPTER VII.
Mr. Watt's narrative of the inventions described in his Specification of 1769, given in
his notes on Robison-Further anecdotes of his invention of the Separate Con-
denser-His narrative entitled 'A Plain Story'
CHAPTER VIII.
Dr. Black's and Professor Robison's account of Mr. Watt's introduction to Dr. Roe-
buck-Entire originality of Mr. Watt's invention-Confirmed by Dr. Roebuck-
Wilcke's air-pump acting by the condensation of steam-Subsequent to Mr. Watt's
invention of the Separate Condenser-Humphry Gainsborough
CHAPTER IX.
History of the steam-engine before the time of Watt-Eolipiles-Gerbert-Porta
-Rivaylt-Solomon de Caus-Marquis of Worcester-His Century of Inven-
tions'-Question whether he executed his apparatus-His Act of Parliament-
Beaufort MSS.-Rolluck's 'Panegyric'-Travels of Cosmo de Medicis
59
77
88
CHAPTER X.
Comparative claims of Solomon de Caus and the Marquis of Worcester-National
controversy-Letter from Marion de l'Orme, published by Miss Costello-Exposure
of a fraudulent imposture-Philosophical discoveries of the seventeenth century
-Galileo-Torricelli-Pascal-Otto de Guericke
CHAPTER XI.
Denys Papin-His memoir of 1690-attempt to form a vacuum by gunpowder-His
subsequent adoption of Savery's principle--his digester-Mistakes of English and
French writers in regard to his inventions-Translation of his paper of 1690 .
CHAPTER XII.
Thomas Savery—' The Miner's Friend'-Description of his steam-engine-Uses, to
which it could be applied-Papin's inferior imitation of it-Estimate by horse-
power-Sir Samuel Moreland-Newcomen and Cawley-Their great improve-
ments-Desaguliers-Amontons and Dalesme-Smeaton
Dr. Roebuck-His history-Carron iron-works-Introduction to Mr. Watt-Borrow-
stoness-Progress of the new steam-engine-Testudo boiler-Difficulties with
cylinder and piston-Plate-condenser-Circular steam-engine or steam-wheel-
Dr. Roebuck's embarrassments-Mr. Watt's land-surveying and civil-engineering
-His visit to Soho-Introduction to Dr. Small-Renewed experiments-Propo-
sals of partnership with Mr. Boulton-Patent of 1769
CHAPTER XIV.
Specification of the Patent of 1769-Interrupted negotiations-Continued experi-
ments-Expansive power of steam-Successful trial of engine at Kinneil-Pipe-
condenser-Further negotiations with Soho-Contingent agreement with Dr.
Roebuck-Position and circumstances of Mr. Watt
CHAPTER XV.
Mr. Watt's civil-engineering-Construction of the Monkland Canal-Steam-boats for
canals-Screw-propeller or Spiral Oar, 1770-Survey for canal in Strathmore-
Hamilton Bridge-Channel of the Clyde-Crinan Canal, and other works-Survey
for Caledonian Canal-Telford-Rate of remuneration of engineers in the last
century
123
148
162
CHAPTER XVI.
Philosophical problems-Time-pieces-Micrometer and dividing-screw-Surveying
quadrant-Barometers-Micrometers for measuring distances-History of the in-
vention of micrometers-Sir David Brewster-De la Hire-Rochon-Maskelyne
-Death of Mr. Watt's first wife
CHAPTER XVII.
Depression of spirits-Insolvency of Dr. Roebuck-Formation of Partnership with
Mr. Boulton-Transference of the new engine to Soho-Prolongation of Patent
of 1769-Death of Dr. Small-Notices of his life, talents, and virtues-Progress
and prospects of the new manufactory-Articles of partnership
CHAPTER XVIII.
Offers of employment in Russia-Progress at Soho-Privilege granted in France-
Jary and Perrier-M. de Prony-Visits to Cornwall-Introduction of the new
steam-engines-Patent of 1780 for copying-machine-Machine for drying linen by
steam-Patent of 1781-" Sun and planet wheels"-Patent of 1782-Expansive
Principle-Double-acting engine-Double or compound engine
CHAPTER XIX.
Steam Tilt-hammer-Patent of 1784-Parallel Motion-Locomotive Steam-carriages
-Counter-Throttle-valve-Governor-Steam barometer or float-Steam-gauge
-Indicator-Most inventive period of Mr. Watt's life-Death of his father-Pa-
tent of 1785-Consumption of smoke
182
197
211
289
CHAPTER XX.
History of the Discovery of the Composition of Water-Mr. Watt's study of chemis-
try-State of that science previous to 1783-Black and Priestley-Macquer—
Volta-Warltire-Cavendish-Drew no conclusion from his experiments-Lavoi-
sier-His knowledge of the experiments of Cavendish
CHAPTER XXI.
Mr. Watt's examination of Dr. Priestley's experiments in March and April, 1783—
His conclusions as to the Composition of Water-His letter to Dr. Priestley-De-
lay in reading it before the Royal Society-Known to Cavendish, Blagden, and
Lavoisier, in 1788-Cavendish's paper of January, 1784-Apparent plagiarism--
Curious double typographical errors-Blagden's Letter to Crell, 1786
255
. 262
CHAPTER XXII.
Arguments of the advocates of Cavendish―Their groundlessness-Priority of Watt
maintained during his lifetime-Opinions of philosophers since his death-Dr.
Henry-Sir Humphry Davy-Lord Brougham-Arago-Dumas-Sir David Brew-
ster-Lord Jeffrey-Liebig-Mr. Watt's scrupulous sense of justice-His acquaint-
ance with Cavendish-Festivities of the Royal Society
. 279
CHAPTER XXIII.
Proposed uniformity of weights and measures-The Lunar Society-Dr. Darwin-
Priestley-Riots at Birmingham-Mr. Watt's Journey to Paris at the request of
the French Government-Machine of Marly-Bleaching by chlorine-Infringe-
ment of steam-engine Patents-Trials at law-Parties to the actions-Arguments
against and for the validity of the patent of 1769—Nature of the evidence-J.
Bramah-Verdicts in favour of the patentees-Validity of the patent of 1769 con-
clusively established . 294
CHAPTER XXIV.
Termination of the patent-privilege of 1769 and 1775—And of the original partner-
ship of Boulton and Watt-Continuance and increase of their steam-engine busi-
ness-Attempted robbery-Assistants at Soho-William Murdock, his life, ser-.
vices, and inventions-Mr. Watt in his old age-Pneumatic medicines-Founda-
tion of Prize in Glasgow College-Library at Greenock-Charitable acts
CHAPTER XXV.
Steam Navigation-Its origin and progress-Paddle-wheels-Early steamboats—
Papin-Hulls, Miller, Symington, Fulton, Henry Bell, &c.-Mr. James Watt, ju-
nior-His voyage in the "Caledonia,” in 1817, to Germany, Belgium, and Holland
-H.M.S. the "James Watt"-Locomotive Steam-carriages-Mr. Watt's patent,
and Mr. Murdock's model, of 1784-Mr. Watt's views of locomotion on land by
steam
815
880
New lamps-Gravimeter-Caoutchouc tubes-Arithmetical machine-Articulated
water-pipe-Machine for copying sculpture-Its gradual progress, and its per-
formances-Dates and extracts from MSS. concerning it-Intended specification
of a patent for its invention-Relative drawings-Time employed in its operations
Perfection of the work done
ΧΙ
850
CHAPTER XXVII.
Mr. Watt's pursuits in retirement-Second journey to Paris-Purchases of land in
Wales-The snuff-box-Evenings at home-Shrievalty of Staffordshire and Rad-
norshire-Study of Anglo-Saxon-Political sentiments-Anecdotes of his son
James-Characteristics of Mr. Watt's conversation and friendly counsels-Revi-
sal of Robison 'On Steam'-Edgeworth's proposal of a tunnel across the Menai
Strait . 865
CHAPTER XXVIII.
Mr. Watt in old age-His portraiture by Sir Walter Scott-Madame Rumford-
Thomas Campbell-Loss of friends by their predecease-Robison, Black, Wither-
ing, Darwin-Particulars of the death of Dr. Black-Gregory Watt-Robison,
Beddoes, Boulton, Patrick Wilson, De Luc-Mr. Watt's own last illness-And
death-Offer of a Baronetcy-Monuments to his memory-Westminster Abbey
-Handsworth Church-Glasgow-Greenock-Lord Jeffrey's character of him
890
INDEX
409
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