Santos Dumont’s flying machine, 113 Screw blade on Farman’s machine, 41 „ blades, Testing of, 36 „ „ used by the French Government, 39 „ „ with radial edges, 43 „ Fabric-covered, 40 „ Position of, 49 „ propeller made of sheet metal, 41 „ propellers, Efficiency of, 33, 147 Screws, 8, 31, 35, 36, 40, 41, 46, 47, 49 „ Building up of my large, 40 „ their efficiency in steamships, 47 Shape and efficiency of aeroplanes, 99 Skin friction, 41, 48 Spider’s webbing down from the sky, 27 Spirit lamp and ice box, 62 Stability of flying machines, 147, 150 Steam engines used by me, 155 Steering, 147, 149 Superposed aeroplanes, 144 System of splicing and building up wooden members, 86 Tables:-- Equivalent inclinations, 115 „ velocities, 116 French and English measurements, 128, 129 Philipps’ experiments, 119 Relative value of different woods, 85 Showing the relative power exerted by different birds, 24 Velocity and pressure of the wind, 114 „ „ thrust corresponding with various horse-powers, 117 Testing aeroplanes, condensers, etc., 52 Teutonic vision of aerial power, 126 Velocity and pressure of wind, 114 „ „ thrust corresponding with various horse-powers, 117 “Ville de Paris,” 123 Wright Bros.’ experiments, 109, 159, 162 Zeppelin’s experiments, 124, 159, 161 BELL AND BAIN, LIMITED, PRINTERS, GLASGOW. Transcriber’s Notes: Inconsistent spelling and hyphenation in the original work have been retained. Depending on the hard- and software used to read this text and their settings, not all characters and symbols may display as intended. Changes made to the text: