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

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

M.

Machine, Animal is a Delicately-constructed. Art. 221, p. 160
does not Create. Art. 44, p. 34

Electric. Art. 86, p. 65

Arts. 138, 139, p. 98

Functions of a. Arts. 42, 43, pp. 30-32

described by Galileo, Art. 44, p. 33

merely transmutes Energy. Art. 42, p. 30

Machines of two kinds. Arts. 216-220, p. 157

Magnet, Attraction and Repulsion of. Art. 101, p. 75
Magnetic Effects of Current. Arts. 96, 97, p. 72
Magneto-Electricity. Arts. 144–147, p. 103
Mass, Energy Proportional to. Art. 20, p. 14
Meyer on Theory of Conservation. Art. 194, p. 140
Tides. Art. 133, p. 94

Mechanical Energy and its Change into Heat. Cap. 2, Arts. 34-63,
pp. 23-47

Equivalent of Heat. Arts. 58-63, pp. 45-47
Instability. Arts. 213, 214, p. 155

Medium, Aristotle on a.

Art. 186, p. 134

Descartes on a.

Art. 189, p. 136

Huyghens on a.

Art. 189, p. 136

Newton on a. Art. 189, p. 136

Metallic Precipitates. Arts. 165, 166, p. 120
Metals, soldering together of Heterogeneous.
Molecules, Activity of. Arts. 10, 11, p. 7

Art. 168, p. 122

and Atoms Defined. Arts. 68, 69, p. 51
Molecular and Atomic Force, remarks on. Arts. 72-78, p. 55
Forces, Strength of. Art. 75, p. 57

11, p. 8.

Impossible to become directly acquainted with. Art.

Motion, Air and Water in. Art. 203, p. 147

Electricity in. Art. 107, p. 88

Art. 161, p. 116

Arts. 169, 170, p. 123

Energy Independent of Direction of. Art. 31, p. 21
of Visible. Arts. 121-147, pp. 87-103

Arts. 148, 149, p. 105

Heat a Forward and Backward. Arts. 56, 57, pp. 41, 42
a species of. Arts. 49-55, pp. 38, 39

Visible. Arts. 171-173, p. 124

Energy in. Art. 113, p. 81

Motions on the Earth, Absorbed Heat in. Arts. 131, 132, p. 88
Planetary. Arts. 132-137, p. 93

N.

Native Sulphur, &c. Art. 102, p. 147

Nature, Energies of, Enumerated. Arts. 107-114, pp. 78-81
Forces and Energies of. Cap. 3, Arts. 64-107, pp. 48-78
of, Enumerated. Arts. 65-78, pp. 48-55

of Proof of Law of Conservation. Arts. 117-120, p. 83
Natural Energies chiefly from Sun. Art. 203, p. 147

and their Sources. Art. 196, p. 143

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

Nonconductors and Conductors. Art. 80, p. 61

0.

Opposite and Equal, Action and Reaction. Art. 12, p. 6
Organic and Inorganic Worlds. Art. 4, p. 3

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

World, the. Arts. 7-9, p. 5

Organized Tissues subject to Decay.

Arts. 227, 228, p. 164

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

Other Varieties of Energy. Art. 62, p. 47

P.

Peltier's Experiment. Art. 176, p. 126

Percussion converts Energy into less useful Form. Art. 47, p. 36
what Friction and, do. Arts. 26-48, pp. 35-37

Perpetual Light Impossible. Art. 205, p. 149

Motion. Art. 193, p. 139

Pith Ball, experiments with. Art. 81, p. 62

Planetary Motions, Absorbed Heat in. Arts. 132-137, p. 93
Plants, leaves of. Arts. 179-181, p. 128

Poles, Electrical Condition of. Art. 93, p. 71

of a Battery, the.

Art. 92, p. 71

Art. 37, p. 26

Position, Advantage of.

Energy of. Art. 34-37, pp. 23-26

Art. 121, 122, p. 87

the, of Life. Cap. 6, Arts. 211-232, pp. 154-165
Visible Energy of. Arts. 108, 109, p. 79

Art. 148, p. 105

Precipitates, Metallic. Arts. 165, 166, p. 120

Preliminary Remarks. Art. 211, p. 154

Pressure lowers Freezing Point of Water. Art. 156, p. 110

Prince Rupert's Drops. Art. 158, p. 114

N

Principles of Virtual Velocities.

Probable Fate of Universe.
Problems allied to Energy.

Arts. 44, 45, pp. 33, 34
Art. 191, p. 137

Arts. 209, 210, p. 152
Arts. 182, 183, p. 131

Properties of Electricity. Arts. 99-105, pp. 60-75

R

Radiant Energy. Art. 114, p. 81

Art. 178, p. 128

Light and Heat. Art. 162, p. 117

Reaction and Action, Equal and Opposite. Arts. 12-16, p. 8
Relation between Velocity and Energy.

Remarks, Bacon's. Art. 185, p. 134

Arts. 25-33, pp. 16–21

on Electricity. Arts. 79, 80, p. 60
Engines. Art. 155, p. 109

Molecular and Atomic Forces. Arts. 72-78, p. 55
Whewell's. Art. 186, p. 134

Repulsion and Attraction of Currents. Art. 100, p. 74

of Magnets. Art. 101, p. 75

Resistance and Buoyancy of Atmosphere disregarded. Art. 30, p. 20
Rifle Ball possesses Energy. Art. 18, p. 13

Further Considered. Art. 17, p. 12
Illustration of. Arts. 13, 14, p. 9

Rise of True Conceptions regarding Work.
Rule for Measuring Work. Art. 24, p. 16
Ru aford's Experiments. Art. 52, p. 39

S.

Art. 192, p. 138

Scott, Sir W., on Perpetual Light. Art. 204, p. 143
Separation, Atomic or Chemical. Art. 111, p. 80

Arts. 171, 172, p. 124

Molecular. Art. 110, p. 80

Set of Pulleys. Art. 42, p. 30

Sketch, Historical. Cap. 5, Arts. 182-210, pp. 131-152

Soldering together of Heterogeneous
Sound and Heat, Analogy between.

Metals. Art. 168, p. 122
Art. 57, p. 42

Sounding and Hot Body, Analogy between.

Sources of Natural Energies. Art. 196, p.

Art. 162, p. 118

143

Square of Velocity, Energy proportional to. Art. 28, p. 19
Stable and Unstable Equilibrium. Art. 212, p. 154

Statement of Law of Conservation. Art. 115, 116, p. 82
Steam, Latent Heat of. Art. 74, p. 57

Stone, a, high up. Art. 34, p. 23

Strength of Molecular Forces. Art. 75, p. 57

Substances, List of, which develop Electricity. Art. 85, p. 64

Sulphur, Native. Art. 202, p. 147

Sun a Source of High Temperature Heat. Art. 204, p. 148
Sun Heat, Origin of the. Arts. 207, 208, p. 150
Natural Energies chiefly from. Art. 243, p. 147
no exception. Art. 206, p. 150
Ultimate dependence of Life on the.
Survey of Organic and Inorganic Worlds.

Arts. 250-252, p. 165
Art. 4, p. 3

T.

Tait, Professor, on Native Sulphur, &c. Art. 202, p. 147
Temperature of Disassociation. Art. 159, p. 115

Theory, the, of Conversation. Art. 194, p. 140
Thermo-Electricity. Art. 161, p. 110

Thermopile, the. Art. 161, p. 117

Thompson, Sir William, and Helmholtz, theory of Sun's Heat. Art. 207,
p. 151

on lowering Freezing Point of Water by Pressure,

Art. 156, pp. 110, 111

Size of Molecules. Art. 8, p. 6

Tidal Energy. Art. 201, p. 146

Tissues, Organised, are subject to Decay. Arts. 227, 228, p. 164
Tourmalines, &c., Heated. Art. 160, p. 115

Transmutation of Energy. Cap. 4, Arts. 121-181, pp. 87-128
Visible Energy. Arts. 38-41, pp. 27, 28
True Conceptions, Rise of, regarding Work. Art. 192, p. 138
Functions of a Machine defined by Galileo. Art. 44, p. 33
Two Forms of Absorbed Heat. Arts. 149-162, pp. 105–118
Kinds of Electricity. Art. 81, p. 62

always developed together. Art. 82, p 62
Machines. Arts. 216-220, p. 157

Twofold Nature of Equilibrium. Art. 212, p. 154

U.

Ultimate Dependence of Life on the Sun. Arts. 230-232, p. 165

Universe, probable Fate of the. Arts. 209, 210, p. 152
Unstable and Stable Equilibrium. Art. 212, p. 151