The Fall of Icarus _Frontispiece_
The Aviator 3
The Santos-Dumont "_Demoiselle_" 4
View from a Balloon 9
Anatomy of a Bird's Wing 10
Flight of a Bird 11
In a Meteoric Shower 13
How a Boat Tacks 15
Octave Chanute 18
Pressure of the Wind 19
Forces Acting on a Kite 20
Sustaining Force in the Aeroplane 23
Direct Lifting and Resisting Forces 24
Shapes of Planes 26
Balancing Sail 28
Roe's Triplane at Wembley 30
Action of the Steering Rudder 31
Recent Type of Wright Biplane 31
Circular Flight 33
The Aileron 35
Wing Tipping 36
Wing Warping 37
The Gyroscope 39
Diurnal Temperatures at Different Heights 45
Seasonal Variation in Wind Velocities 47
The Wind Rose for Mt. Weather, Va. 49
Diagram of Parts of a Drifting Balloon 51
Glidden and Stevens Getting Away in the "_Boston_" 52
Relative and Absolute Balloon Velocities 53
Field and Speed 53
Influence of Wind on Possible Course 54
Count Zeppelin 55
Buoyant Power of Wood 57
One Cubic Foot of Wood Loaded in Water 58
Buoyant Power of Hydrogen 59
Lebaudy's "_Jaune_" 60
Air Balloon 62
Screw Propeller for Altitude Control 66
Balloon with Ballonets 67
Construction of the Zeppelin Balloon 68
The Equilibrator 69
Henry Giffard's Dirigible 71
Dirigible of Dupuy de Lome 72
Tissandier Brothers' Dirigible Balloon 73
The "_Baldwin_" 74
The "_Zeppelin_" on Lake Constance 75
The "_Patrie_" 77
Manufacturing the Envelope of a Balloon 79
Andrée's Balloon, "_L'Oernen_" 80
Wreck of the "_Zeppelin_" 82
Car of the "_Zeppelin_" 84
Stern View of the "_Zeppelin_" 86
The "_Clément-Bayard_" 87
The "_Ville de Paris_" 88
Car of the "_Liberté_" 89
The "_Zodiac No. 2_" 92
United States Signal Corps Balloon Plant at Fort Omaha 93
The "_Caroline_" 94
The Ascent at Versailles, 1783 95
Proposed Dirigible 96
The "_République_" 97
The First Flight for the Gordon-Bennett Cup 99
The Gnome Motor 102
Screw Propeller 103
One of the Motors of the "_Zeppelin_" 104
The Four-Cycle Engine 105
Action of Two-Cycle Engine 106
Motor and Propeller 108
Two-Cylinder Opposed Engine 110
Four-Cylinder Vertical Engine 110
Head End Shapes 113
The Santos-Dumont Dirigible No. 2 115
In the Bay of Monaco: Santos-Dumont 117
Wright Biplane on Starting Rail 121
Launching System for Wright Aeroplane 122
The Nieuport Monoplane 124
A Biplane 125
Ely at Los Angeles 126
Trajectory During Descent 127
Descending 128
The Witteman Glider 130
French Monoplane 132
A Problem in Steering 133
Lejeune Biplane 134
Tellier Monoplane 135
A Monoplane 137
Cars and Framework 139
Some Details 139
Recent French Machines 141
Orville Wright at Fort Myer 143
The First Flight Across the Channel 144
Wright Motor 145
Voisin-Farman Biplane 147
The Champagne Grand Prize Flight 148
Farman's First Biplane 149
The "_June Bug_" 150
Curtiss Biplane 151
Curtiss' Hydro-Aeroplane at San Diego Bay 152
Flying Over the Water 153
Blériot-Voisin Cellular Biplane with Pontoons 154
Latham's "_Antoinette_" 155
James J. Ward at Lewiston Fair 156
Marcel Penot in the "_Mohawk_" 157
Santos-Dumont's "_Demoiselle_" 159
Blériot Monoplane 160
Latham's Fall into the Channel 161
De Lesseps Crossing the Channel 163
The Maxim Aeroplane 164
Langley's Aeroplane 165
Robart Monoplane 166
Vina Monoplane 167
Blanc Monoplane 170
Melvin Vaniman Triplane 171
Jean de Crawhez Triplane 171
A Triplane 172
Giraudon's Wheel Aeroplane 175
Bréguet Gyroplane (Helicopter) 177
Wellman's "_America_" 181
The German Emperor Watching the Progress of Aviation 189
Automatic Gun for Attacking Airships 193
Gun for Shooting at Aeroplanes 197
Santos-Dumont Circling the Eiffel Tower 199
Latham, Farman and Paulhan 202