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Inventions Engender Others.-Co-operative Growth.-
Broom Making.-Crude Condition until the Modern
Lathe, Mandrel, Shuttle and Sewing Machine.-Broom
Sewing Machines.-Effect on Labour.-The Brush and
Brush Machines.-A Hundred Species of Brushes, each
Made by a Special Machine.-First Successful Brush
Machine, Woodbury's, 1870.-Wonderful Operations.-
Street-Sweeping Machines, 1831.-Most Effective Form.
-Abrading Machines.-Application of Sand Blast.-Na-
ture's Machine Patented by Tilghman in 1870.-Things

Done by the Sand Blast and How,-Emery and Corun-
dum Machines.-Vast Application in Cutting, Grinding,
Polishing.-Washing and Ironing Machines.—Their
Contribution to Cleanliness and Comfort.-Laundry
Appliances.-Old and the New Mangle.-Starch Apply-
ing.-Steam Laundry Machinery.-Description of Work
done in a Modern Laundry...

......

CHAPTER XXI.

WOOD-WORKING.

Contrast of Prehistoric Labour and Implements and Mod-
ern Tools.-The Ages of Stone, Bronze, Iron, and the
Age of Wood.-The Slow Growth of Wood-working In-
ventions.-Tools of the Egyptians.-Saw of the Greeks.
-Known to Hindoos and Africans.-Accounts of Pliny
and Ansonius as to Planes and Marble Sawing.-Saw-
mills of France, Germany, Norway, Sweden,-Holland
100 Years ahead of England, and Why.-William Penn
Found Saw-mills in America in 1682.-What made Ameri-
cans Inventors.-Progress Unknown where Saw-mills
are not.-Steam and Saw Mills.-Splendid System and
Inventions of Samuel Bentham, Bramah and Branch at
Close of Eighteenth Century.-First Decade of Nine-
teenth Century Produces Wonderful Inventor, Thomas
Blanchard.-His Life and Inventions.-Machines for
Turning Irregular Forms in Wood and Metal.-The Bor-
ing Worm and Boring Machine.-Gun-making and Mor-
tising Machines.-Complicated Ornamental Wood-cut-
ting and Carving Machines.-Whatever Made by Hand
can be Better Made by Machinery.—Pattern-Cutting
Machines.-Xyloplasty.-Art of Hand Carving Revived.
-Bending of Wood by Fire and Steam.-The Problems
Solved by Wood-working Inventors.-Great Saws at the
Vienna Exposition, 1873.-Boring Tools, Augers, Planes,
Lathes, etc. How Improved and by Whom.—“The Uni-
versal Wood Workers."-Flexible Shafting.-Shingles
and Tiles.-A Great Log, how Turned into Bundles of
Shingles.-Veneering.-What Pliny Thought of It.-

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Leather and Prehistoric Man.-Earliest Implements and
Processes Forerunners of Modern Inventions.-Modern
Leather Unknown to the Earliest Races.-Tanning.-
Leathers of Different Nations.-Hand Tools and Variety
of Operations, Inventions of Nineteenth Century-La-
bour-Saving Machinery and New Processes.-Epoch of
Modern Machinery.-1780, John Bull and his Scraping

Ancient Tools and the Art of Building.-The Parthenon.-
Aqueducts of Rome.-Tombs of India.-Halls of Alham
bra.-Gothic Cathedrals.-Steam First Drew Coal, then
Sawed Wood and then Stone.-Stone-cutting Machin-
ery.--Carving.-Dressing.-Drilling.-Tunnels. - Won-
derful Work of Stone-Boring Machine on Pillars of Ohio
State Capitol.-Stone Drills and Compressed Air.-Hell
Gate.-Crushing Stones and Ores.-Blake's Crusher.-
"Road Metal."-Different Form of Crushers.-Assorting
Coal.-Steam and Coal, strong Brothers.-Compressed
Air for Mining Machinery.-Mighty Picks Driven by
Air.-Electric Motor.-Machines for Screening, Loading,
and Weighing.-Ore Mills.-Separators.-Centrifugal
Action. Ore Washing. - Amalgamators: Electric,

Lead, Mercury, Plate, Vacuum, Vapour, etc.-The
Revolution in Mining.-Well Boring an Ancient Art.-
Artesian Wells.-Coal Oil and Coal Wells.-Preceded
by Discovery of Paraffine and its Uses.-Reichenbach,
Young.-Petroleum Discovery.-New Industry.—Col.
Drake and First Oil Well.-Sudden Riches of Farmers.
-Boring Water Wells.-Green's Driven Wells.-The
Deserts Made to Bloom as the Rose......

CHAPTER XXV.

HOROLOGY AND INSTRUMENTS OF PRECISION.

Time Measuring Instruments of Antiquity.—Sun-dial.—
Clepsydra, Hour-glass, Graduated Candle.-Plato's Bell.
-The Clepsydra of Ctesibius.-Incense Sticks of Chi-
nese.-Sundials of Greeks and Romans.-Candles of
Alfred the Great.-Wonderful Clocks of the Middle
Ages.-Henry de Vick of France, 1370.-Two Hundred
Years without Advance.-Astronomers, Brache and
Valherius.-1525, Zech's Fusee.-Progenitors of Moder
Watch, 1500.-1582, Swinging Lamp of Galileo.-1639,
Galileo's Book.-Huygens and the Pendulum.—Dr.
Hooke's and David Ramsey's Inventions.-Hair-Spring
Balances.-George the Third's Small Time-Piece.-Eigh-
teenth Century Division of Time Pieces into Hours, Min-
utes and Seconds.-Stem Winders.-Astronomical Dis-
coveries and Chronometers.-Dutch, Leading Clock.
makers; Germany, Switzerland.-Systems Followed ir
these Countries.--Minute Sub-divisions of Labour.-
Watch and Clock Making in the United States.-Amer-
ican System.-Wonderful Machines for every Part.—
Watch factories.-Pope's Simile.-Revolution in Nine-
teenth Century.-Electric System.-4000 Patents in
U.S. since 1800.-Registering Devices.-"A Mechan-
ical Conscience."-Cash Registers.-Voting Machines.
-Electrical Recorders.-Cyclometers.-Speed Indica-
tors.-Weighing Scales and Machines, History of.-The
Fairbanks of Vermont, 1831.-Platform and other
Scales.-Spring Weighing.-Automatic Recorders of

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