'Tracasserie,' of Cavendish and Blagden,
380.

Trafalgar medal presented by Mr. Boulton
to the fleet, 135.

Transactions of the Royal Academy of
Sweden, quoted, 83, 84.

Philosophical, Mr. Watt's and Mr.
Cavendish's papers in the. (See Water,
Composition of.)
Trapp, Mister,' 368.
'Tristia,' 220.
Truro, note, 218.

Tubal Cains, 87.

Tuileries, blood spilt in the gardens of, 376.
Tunnel, across Menai Strait, 387.

Turner, Mr. Charles Hampden, of Rook's
Nest, 400.

Turnerelli, sends models to be copied by
sculpture-machine, 357.

Turtle, at Royal Society Club, 291.

Wales, coal-mine in, in want of engine, 207;
Mr. Watt's estates in, 368, 369; Prince of,
his steam-yacht, 332.

Walker, James, Réport on channel of Clyde,
171, 237, note.

Walpole, Horace, his opinion of the Cen-
tury of Inventions,' 96.
Wanlockhead, in Dumfries-shire, 332.
Warltire, Mr., his experiments, 258, 259.
Warwick, Stafford and Derby, proposed
share in the engine for the counties of,
146.

Wasborough, Matthew, 227, 228.

of elements, 262.
'Water-commanding Engine,' 95.
Water, Composition of, Mr. Watt's discovery
of the, 255, 262-266; progress towards
Macquer and Sigaud de Lafond, 257, 258 ·
Volta, 258; Warltire, ib.; Cavendish
260; Lavoisier, 261; Monge, ih.; Watt
262; his letters to Mr. Boulton, Mr. Ham-
ilton, Dr. Black, Dr. Priestley, Mr. De
Luc, Mr. Smeaton, and Mr. Fry, from
Dec., 1782, to 26th April, 1783, containing
his conclusions, 262-266; greatness of the
discovery, 267; made known to many
members of the Royal Society, 269;
known, among others, to Blagden and
Cavendish, 270; as well as to Lavoisier.
ib.; cause of delay of public reading of
Mr. Watt's letter containing his conclu-
sions, 268; Lavoisier reads to the Academy
of Sciences his memoir on the Composi-
tion of Water, 270; Cavendish reads to
the Royal Society his 'Experiments on
Air,' 271; both without mentioning their
knowledge of Mr. Watt's conclusions,
270-272; reflections, and measures taken
thereon, 272, 273; curious double error of
the press, and its consequences, 274;
Blagden's letter to Crell, and necessary
deductions from it, 275; arguments of
Cavendish's advocates, and their ground-
lessness, 279-285; Mr. Watt's modesty,
and scrupulous love of justice, 289; gen-
eral result of the controversy, 290; drama
of the discovery of, 292.

Water-works, of Greenock, 112; of Ver-
sailles, 300; of Glasgow, 356.

Watt, Gregory, (son of the great engineer,)
birth, 210; talents and pursuits, 816; his
death, ib.

Watt, James, (father of the great engineer,)
birth, apprenticeship, and settlement in
Greenock, 7; various occupations, and
offices, ib.; marriage,, ib.; commercial
losses, 9; children, 10; contents of his
workshops, 19; erection of the first crane
at Greenock, ib.; letter from his son on
renewal of patent of new steam-engine,
203; his death, 250, note; portrait of, 21.
Watt, James, (the great engineer,) his
lineage, 2-9; birth, 10; delicacy of con-
stitution, ib; early study of geometrical
problem, 11; talents and good qualities
while yet a child, ib.; allegations of men-
tal dulness explained and refuted, 12;
Mrs. Campbell's memoranda of his early
years, 11, 12, and 13-16; powers of imagi-
nation, 13; early observation of the con-
densation of steam, 14; variety of youth-
ful pursuits and amusements, constructs
an electrical machine, ib.; studies chem-
istry and anatomy, 15; his schools and
schoolmasters, 17; anecdote of his angling,
ib.; not addicted to fleld sports, 18; neat
ness in drawing, and manual skill, ib.;
practice of carpentry, &c., 19; study of
astronomy and astronomical instruments,

20; portraits of Napier and Newton, 20,
21; chooses the profession of a mathe-
matical-instrument-maker, 21, 22; comes
to Glasgow, 22; introduced to some of
the Professors, ib.; never attended any
lectures, ib.; goes to London, 23; placed
with Mr. Morgan for a year, 25; progress
in his business, 25-28; return to Scotland,
28; repairs astronomical instruments in
Glasgow College, 29, 30; assigned rooms
in the College, 30; appointed mathemat-
ical-instrument-maker to the University,
ib.; partnership with Craig, 32; deficiency
of musical ear, 34; constructs and repairs
musical instruments, 34-36, and 393; quits
College rooms, 37; marries his cousin,
Miss Miller, ib.; invents perspective ma-
chine, 38-42; acquaintance with Dr.
Black, and Robison, 43; repairs model of
Newcomen's steam-engine, 44, 51, 60;
learns German and Italian, 49; narratives
of experiments on steam, and discovery
of the Separate Condenser, 44-58; his
own account, in notes on Robison, 59-68;
applies for Patent for methods of lessen-
ing the consumption of steam in fire-
engines, 67; 'A Plain Story,' 68-76; ex-
perimental progress with new steam-
engine, 127-131; circular steam-engine,
or steam-wheel, 135, 136; a land surveyor
and civil engineer, 132; his works in that
way, 133, 162-181; survey for canal by
Loch Lomond passage, 133; attends a
Committee of Parliament, ib.; first visit
to Soho, 134; wish to be associated with
Mr. Boulton and Dr. Small, 135; success-
ful result of reciprocating or condensing
engine, 136; visits Mr. Boulton at Soho,
134; negotiations for entering into part-
nership in the steam-engine, 140, 146, 147,
154-160; takes out his first patent, of 1769,
for methods of saving fuel, 141; becomes
connected with Dr. Small and Mr. Boul-
ton, 156; engineering works for magis-
trates of Glasgow, 162; plans and executes
Monkland Canal, 162-167; suggests a
spiral oar,' or screw propeller, for steam-
boats, 168; survey for Canal from Perth
to Cupar of Angus, 169, 170; suggestion
of line for canal in Strathearn, 170, 171;
survey for bridge over Clyde at Hamilton,
171; survey and report on channel of
Clyde, ib.; report on harbour of Ayr,
172; survey for junction canal from Bor-
rowstoness, ib.; surveys for canals at Cri-
nan and Tarbert, ib.; for canal from
Macrihanish Bay to Campbelltown, ib. ;
from Hurlet to Paisley, ib.; surveys of
channel of Water of Leven, and of the
Forth, Gudie and Devon, ib.; plans for
Port-Glasgow docks and harbours, and for
Greenock water-works, ib.; survey and
estimate for (Caledonian) canal from Fort
-William to Inverness, 172-176; Telford's
opinion of his accuracy, 177-180; modera-
tion of his engineering charges, 180; phil-
osophical problems discussed with Dr.

Small, 182-189; contrives a new microme-
ter and dividing-screw, 184, 185; new sur-
veying quadrants, 185; astronomical prob-
lems, 186; invents micrometers, cross-
hair, prismatic, and with moveable object-
glass, for measuring distances, 187; de-
scription of, and date of invention, 188;
drawing-machine, (not completed,) 193;
death of his first wife, 193, 194; his grief,
195; children by his first marriage, 196;
depression of spirits, 197, 198; mutual
discharge executed by Dr. Roebuck and
him, 199; removes the parts of the new
engine from Kinneil to Soho, 200; mi-
grates to Birmingham, ib.; renewal of
his patent by Act of Parliament, 202;
sentiments on death of Dr. Small, 204;
formation of partnership of Boulton and
Watt, 206; heads of articles of copartner-
ship, 209; second marriage, to Miss Mac-
gregor, 210; offers of employment in
Russia declined, 211, 212; progress of
engines at Soho, 212, 213; and in France,
214, 217; first journey to Paris, 216; visits
to Cornwall, 217-221; his most fertile
period of invention, 222; his second
Patent, of 1780, for copying-machine, 222
-226; machine for drying linen by steam,
226; his third Patent, of 1781, for rotative
motions, 227-232; his fourth Patent, of
1782, for expansive principle, double-
acting engine, double engine, &c., 232-
238; his steam tilt-hammer, 239-241; his
fifth Patent, of 1784, for the parallel mo-
tion, steam tilt-hammer, steam-carriages,
&c., &c., 242-244; 'starts a new hare,
243; his Counter, 244; his Throttle-Valve,
245; his application of the Governor, 246 ;
his Steam-Gauge, 246, 247; his Steam
Barometer, or Float, ib.; his Steam Indi-
cator, 248; his cement for iron joints of
engines, 249; most inventive period of
his life, 249-251; his sixth Patent, of
1785, for consumption of smoke, 251–254;
makes and publishes his discovery of the
Composition of Water, (see Water, Com-
position of;) receives Mr. Cavendish at
Birmingham and Soho, 291; dines with
him in London, ih.; proposed uniformity
of weights and measures, 291-296; Lunar
Society, members of, 297; their meetings,
and subjects of discussion, 297; bleaching
by chlorine, 301-303; piracies of steam-
engine, 303, 304; consequent litigation,
304-314; its successful termination, 314;
dissolution of original copartnership of
Boulton and Watt, and its results, 315-317;
steam-power manufactured at Soho, 319-
322; able assistants there, 822-825; pursuits
in advanced age, 325; pneumatic medi-
cines,' and Pneumatic Institution, 826;
founds Prize in Glasgow College, 326-329
donation to Greenock Library, 329; char-
itable acts, ib.; directs construction of
first successful engines for steam-boats,
334; 'back stroke' of engine, 886; H.M.S.
'James Watt,' 338; his suggestion, and