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Theories and Definitions.-Franklin's and a Modern One.
-Varieties of the Force.-Generation.-Dynamic En-
ergy.—Discoveries before the Nineteenth Century.—
Magnetism and Electricity.-Fathers of the Science.-
Doctor Gilbert.-Otto von Guericke.-Sir Isaac New-
ton.-Gray.—Dufay.—Professor Muschenbroeck.—Cuneus.

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Charles Morrison. - Franklin and Galvani. -Volta.
-The Door to Nineteenth Century Inventions then
Opened.-Fabroni.—Sir Humphry Davy, Wollaston,
Nicholson, and Carlisle.-Ritter Followed-Electrolysis.
-Faraday and its Laws.-Davy and the Electric Light.
- Batteries. · Daniell. — Grove. - Bunsen. - Brilliant
Discoveries from 1800 to 1820.-Oersted, Schweigger.-
Magnetising Helix.-Indicators.-Arago and Davy.—
Ampère's Discoveries.-Sturgeon and the first Electro-
Magnet, 1825.-Telegraphy.-Gauss, Weber, Schilling.
-Professor Barlow's Demonstration that Telegraphy
was Impracticable.-Joseph Henry.-Powerful Mag-
nets. Modern and Ancient Telegraphy of Various
Kinds.-The Third Decade.-George Simon Ohm.-
Steinheil.-Telegraph of Morse, Vail, Dana, Gale.-
Wheatstone.-U. S. Supreme Court on Morse System.-
His Alphabet and Submarine Telegraph.-Michael
Faraday and Science of Magnets.-Steam and Magneto-
Dynamo Machines.-Chemical Affinity and Electricity.

-Helmholtz, Faraday, Henry, and Pixii.-Ruhmkorff

Coil.-Page.—Electrical Light. — Decomposition of

Water.-Professor Nollet.-First Practical Electric

Light Shone on the Sea, 1858.—Faraday and Holmes.—

Light-house Illumination.-Dr. W. Siemens.--Wilde's

Machine.—Other Powerful Magnetic Machines.—Field

Magnets.-Z. Gramme.-The Various Ways and Means

of Developing Electric Light.-Geissler Tubes.-First

House Lighted in America.-Moses G. Farmer.—

Jablochoff's Candle.-French Regulators.-Outdoor and

Indoor Illumination.-Siemens, Farmer, Brush, Maxim,

Westinghouse, Edison, Swan, Lane-Fox and Others.-

Arc Lamps of Heffner von Alteneck.-Ocean Cables.—

Cyrus W. Field.-John Bright's Expression.-Weak

Currents.-Thomson's Remedy.-Mirror Galvanometer.

-Centennial Exhibition and the Telephone.—Alexan-

der Graham Bell, 1875.-The Telephone and Helmholtz'

Theory of Tone.-Scott's Phonautograph.-Page's Pro-

duction of Galvanic Music and Researches of Reis.-

Its Slow Growth.-The Ideas of Faraday and Henry

still the Basis of the Great Machines.-" Lines of

Force."-Electric Railway.-Storage Batteries.-Dy-

namos.-First Railway at Berlin, 1879.-Then Saxony,

Paris, London, New York.-Telpherage by Professor

Jenkin.-Problems Solved. -Electrical Magicians.-

Edison and Tesla.-Recent Improvements in Telegraphy.

-The Talks Both Ways at Same Time and Multiplied.

-Printing Systems by Types and Otherwise.—Electri-

cal Elevators.-Microphone.-Ticks of a Watch and the

Tread of a Fly Recorded.-Musical Sounds from

Minerals and Other Substances.-Signalling and Other

Appliances.-The X Rays.-Wireless Telegraphy.

Drudgery of Ancient Times Relieved by Modern Inven-
tions.-The Labour of Men and Beasts now Done by
Steam Giants.-Labour-Saving Appliances for Trans-
portation.-Tall Buildings and Elevators.-Evolution

Old as the Thirst of Man.-Prehistoric Inventions.—
China.-Pliny's Record.-Egyptian,

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Carthaginian,

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Greek and Roman Water Works.-" Pneumatics of
Hero."-Overshot, Undershot, and Breast Wheels, An-
cient.-Screw of Archimides.-Frontinus, a Roman In-
spector.-1593, Servière Invents the Rotary Pump.-
1586, Stevinus of Holland, Father of the Elementary
Science.-Galileo, Torricelli, Pascal, and Sir Isaac New-
ton in the Seventeenth Century. -Bernoulli, D'Alem-
bert, Euler, Abbé Bossut, Venturi, and Eylewein in the
Eighteenth. Water Distribution then Originated.—
Peter Maurice and the London Bridge Pumps. - La
Hire's Double Acting Pump.-Dr. John Allen and David
Ramsey of England.-Franklin's Force Pump.-Water
Ram of Whitehurst and Montgolfier.-Nineteenth Cen-
tury Opens with Bramah's Pumps.-Water and Steam.
-Pumps the Strong Hands of Hydraulics.—Review of
Past Inventions: Pascal's Paradox. — Turbines of
Forneyron.-Power of Niagara and Turbines there.-
Jonval's.-Euler's Old Centrifugal Pumps Revived.-

PAGE

Massachusetts and Appold Systems.

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Lowlands of

Holland, Marshes of Italy, Swamps of Florida, Drained.
-Injectors.-Giffard.-Intensifiers.- Hydraulicising.—
Hydraulic Jack and Cleopatra's Needle.-Flow of Cold
Metal.-Lead Pipe Made, and Cold Steel Stretched by
Water Pressure.-Cotton Presses, Sir Wm. Armstrong's
Inventions.-Tweddle and Sir Wm. Fairbairn.-Water
Motors. -Baths and Closets. Results of Modern Im-
provements.-Germ Theory and Filters....................

CHAPTER XII.

PNEUMATICS AND PNEUMATIC MACHINES.

The Slow March of the Human Mind.-Burke.-The Age
of Mechanical Inventions not until nearly Watt's Steam
Engine.-Review of “Learning” until that Time.—
Motor Engines not Produced until Seventeenth Cen-
tury. Suggested by the Bellows and the Cannon.-Huy-
gens and Papin.-Van Helmont the Author of the
Term"
Gas," 1577-1644.-Robert Boyle and the Air
Pump.-Law of Gases.-Mariotte.-Abbé Hauteville,
1682.-The Heart and a Motor.-Sun Burner.-Murdock,
1798, Uses Coal Gas for Illumination.-John Barber
and Carburetted Hydrogen.-Street's Heated Gas.—1801,
Lebon Proposes Coal Gas Motor.-Investigations of
Dalton and Gay-Lussac, 1810.-Heat engines: Air, Gas,
Steam, Vapor, Solar.-Explosive-Temperature the
Tie that Binds them as One Family.-1823-26, Sir
Samuel Brown.-Gunpowder and Gas Engine.—Davy
and Faraday.-Gas to a Liquid State.-Wright, 1833.—
Burdett's Compressed Air Engine, 1838.-Lenoir's.—
Hugon's.-Beau de Rohes' Investigations.-Oil Wells of
United States, 1860.-Petroleum Engines.-Brayton,
Spiel.-Otto's Gas Engine and Improvements.-Am-
moniacal Gas Engines.-Nobels' Inventions.—Storm's
Gunpowder Engine.-Gas and Vapour Compared with
Steam.-Prof. Jenkins' Prediction.-Gas to Supplant
Steam.-Compressed Air Engines.—Innumerable Ap-
plications of Pneumatic Machines.-A Number Mẹn-

164

The Antiquity of the Art.-The "Lost Arts" Rediscov-
ered.—The Earliest Forms of Smelting Furnaces.—
Ancient Iron and Steel.-India and Africa.-Early
Spain and the Catalan Furnace.-The Armour of Don
Quixote.-Bell's History of the Art.-Germany.-Cast
Iron Made by Ancients, Disused for 15 Centuries.→

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