Current of Electricity. Art. 172, p. 124
Currents, Attraction and Repulsion of.

Art. 100, p. 74
Art. 173, p. 124

D.

Davy's Experiments. Arts. 49–51, p. 38

Decay, Organized Tissues subject to. Arts. 227, 228, p. 164
Decomposition by the Battery. Art. 177, p. 127

Definition of Energy. Art. 19, p. 13

Molecules and Atoms. Arts. 68, 69, p. 51
Velocity. Art. 25, p. 16

Work. Art. 23, p. 15

Democritus on Atoms. Art. 185, p. 133

Descartes on a Medium. Art. 189, p. 136

Description of Electrical Current. Arts. 91, 92, p. 69

Difference between an Animate and Inanimate Machine. Art. 229, p. 165
Direction of Battery Current. Arts. 94, 95, p. 71

Directness of Motion, Energy Independent of. Art. 31, p. 21

Disassociation, Temperature of. Art. 159, p. 115

Diseases caused by Organic Germs. Art. 5, p. 3

Dissipation of Energy. Cap. 5, Arts. 182–210, pp. 131-152

Art. 161, p. 116

Arts. 169, 170, p. 123

Arts. 173-177, pp. 124-127

its Properties. Arts. 79-105, pp. 60-75

List of Substances which develop it. Art. 85, p. 64.
Magnetic. Arts. 144-147, p. 103

only produced when Heterogeneous Bodies are rubbed.
Art. 84, p. 64

probably allied to Chemical Affinity. Art. 85, p. 64

remarks on. Arts. 79, 80, p. 60

two kinds of. Art. 81, p. 62

always developed together. Art. 82, p. 63.

Energies and Forces of Nature. Cap. 3, Arts. 64-107, pp. 48-78.
of Nature enumerated. Arts. 107-114, p. 78-81
Natural, and their Sources. Art. 196, p. 143

chiefly from the Sun.

Energy, a Machine merely Transmutes it.
and Velocity, Relation between.
converted into less useful Form

Definition of. Art. 19, p. 13

Art. 203, p. 147
Art. 42, p. 30

Arts. 25-33, pp. 16-21
by Friction. Art. 46, p. 35
Percussion. Art. 47, p. 36

Dissipation of. Cap. 5, Arts. 182-210, pp. 131-152
Heating Effects proportional to. Art. 58, p. 43

Heraclitus on.

Art. 184, p. 133

Independent of Directness of Motion.

Mechanical, and its Change into Heat.

pp. 23-47

not simply proportional to Velocity. Arts. 21, 22, p. 14
of Position. Arts. 34-37, p. 23

Arts. 108, 109, p. 79

Arts. 121, 122, p. 87

of Visible Motion. Art. 107, p. 78

possessed by a Rifle

Problems allied to.

Arts. 121-147, pp. 87-103
Arts. 148, 149, p. 105
Ball. Art. 18, p. 13

Arts. 182, 183, p. 131

proportional to Mass. Art. 20, p. 14

Square of Velocity. Art. 28, p. 13

Radiant. Art. 114, p. 81

Art. 178-181, p. 128

the Power of doing Work. Art. 23, p. 15

There are other varieties of. Art. 62, p. 47

Tidal. Art. 208, p. 146

Transmutation of. Cap 4, Arts. 121-187, pp. 87-128
Visible, Transmutations of. Arts. 38-41, pp. 27, 28

Energy, Visible, of Position. Art. 148, p. 105

What is it? Cap. 1, Art. 1, p. 1

Engine, the Heat. Art. 149, p. 105

the Earth an. Art. 154, p. 108

Engines, Law of Working of Heat. Arts. 150-152, p. 106
Remarks on. Art. 154, p. 108

Enumeration of Energies of Nature. Arts. 107-114, pp. 78-81
Forces of Matter. Arts. 65-78, pp. 48-55

Equal and Opposite, Action and Re-action.
Equilibrium, Conditions of. Art. 44, p. 34

Art. 2, p. 8
twofold Nature of. Art. 212, p. 154
Equivalent, Mechanical, of Heat. Arts. 58–63, pp. 43–47
Examples. Art. 29, p. 20

Existence a Continued Fight. Art. 3, p.

Experiments by Davy. Arts. 49-51, p. 38

Joule. Arts. 59-61, p. 44

Peltier. Arts. 176, p. 126

Rumford. Art. 52, p. 39

F.

Fate, Probable, of the Universe. Arts. 209, 210, p. 152
Falling Stone, Illustration of a. Arts. 15, 16, p. 11

Fire, an ordinary. Art. 153, p. 108

Fluids, Friction of. Art. 59, p. 44

Food. Art. 199, p. 145

Forces and Energies of Nature. Cap. 3, Arts. 64–107, pp. 48-78
other, besides Gravity. Arts. 32, 33, p. 21

Forward and Backward Motion, Heat a. Arts. 56, 57, pp. 41, 42
Freezing Point of Water lowered by Pressure. Art. 156, p. 110
Friction and Percussion, what they do. Arts. 26-48, pp. 35-37
converts Energy into less useful Form. Art. 46, p. 35
of Fluids. Art. 54, p. 44

Fuel, embracing Wood and Coal. Art. 197, p. 143
Functions of a Machine. Arts. 42, 43, pp. 30-32

G.

Galileo defined Principles of Virtual Velocities. Art. 44, p. 33

true Function of a Machine. Art. 44, p. 30

Galvanometer, the. Art. 96, p. 72

Goldfish, vessel of. Art. 12, p. 9

Heat, Absorbed. Art. 178, p. 128

a Backward and Forward Motion. Arts. 56-59, pp. 41, 42
a species of Motion. Arts. 49-55, pp. 38, 39

(a resisting body). Arts. 174, 175, p. 125
analogy between, and Sound. Art. 57, p. 42

appears when Friction and Percussion destroy Motion.

p. 37

Bacon on.

Art. 190, p. 137

Art. 48,

Change into, of Mechanical Energy. Cap. 2, Arts. 34-63, 23–47
Engine, Energy of Visible Motion in the. Art. 149, p. 150
Law of Working of. Arts. 150-152, p. 106

Mechanical Equivalent of. Arts. 58-63, pp. 34-47

Motion. Art. 110, p. 50

Origin of the Sun's. Arts. 207, 208, p. 150

Radiant. Art. 162, p. 117

Unit, value of. Art. 62, p. 46

Heated Substance not in Motion as a whole. Art. 56, p. 41

Heating Effect of Current. Art. 98, p. 73

Heating Effects proportional to Energy. Art. 58, p. 73

Helmholtz and Thomson on the Origin of the Sun's Heat. Art. 207, p. 151
Heraclitus on Energy. Art. 184, p. 133

Heterogeneous Bodies only produce Electricity when rubbed. Art. 81,
p. 64

Metals Soldered together. Art. 168, p. 122

High Temperature Heat, the Sun the Source of. Art. 204, p. 148
Historical Sketch. Cap. 5, Arts. 182-210, pp. 131-152

Hot and Sounding Body, analogy between. Art. 162, p. 118

Huyghens on a Medium. Art. 189, p. 136

Hydrostatic Press. Art. 43, p. 32

Hypothesis, Electrical. Art. 83, p. 63

I.

Ice Melted by Friction. Art. 123, p. 88

Ideas of Ancients not Prolific. Arts. 187, 188, p. 135

Ignorance of Individuals. Arts. 1-4, p. 1

Impossibility of Perpetual Light. Art. 245, p. 149

seeing Molecules. Art. 11, p. 8

Inanimate Machines, difference between Animals and. Art. 229. p. 165
Inclined Plane, Velocity in the. Arts. 40, 41, p. 28

Art. 45, p. 34

Individuals, Ignorance of. Arts. 1-4, p. 1

Induction, Electric. Arts. 87, 88, p. 65

of Currents. Arts. 102-105, p. 75

Inorganic Molecule, an. Art. 7, p. 5
World, the. Arts. 5, 6, p. 3

Instability, Chemical. Art. 215, p. 156

Mechanical. Arts. 213, 214, p. 155

J.

Jevons, Prof. S., on Coal Supply. Art. 198, pp. 144, 145
Joule's Experiments. Arts. 59-61, p. 44

Latent Heat of Steam. Art. 74, p. 57

Water. Art. 74, p. 56

Law of Action of Gravitation. Art. 65, p. 48

Conservation. Arts. 115-120, pp. 82, 83

Working of Heat Engines. Arts. 150-152, p. 106

Leaves of Plants. Arts. 179-181, p. 128

Lever, Illustration of. Art. 45, p. 34

Leyden Jar. Arts. 89, 90, p. 67

Life like the Commander of an Army. Arts. 222-226, p. 171
the Position of. Cap. 6, Arts. 211-232, pp. 154-165

true Nature of, not discovered. Art. 224, p. 163

Ultimate Dependence of, on the Sun. Arts. 230-232, p. 165
Light, Perpetual, Impossible. Art. 205, p. 249

Radiant. Art. 162, p. 117.

List of Substances which develop Electricity. Art. 85, p. 64
Low Level Disease, Cholera a. Art. 6, p. 4