_Daily Mail_, London, prizes, 104, 115, 120 De Havilland airplane, 175, 194 _Demoiselle_, 114 Deutsch, 57, 63 "Dope," 164, 227 Dorand airplane, 181 Douglas, Archibald, 37 Drachen balloon, 36-44 Drift, airplane, 97 Dubonnet, Emile, 41 Eiffel Tower, flight around, 57, 115 Engine: Argus, 126 Clerget, 187 Curtiss, 71 development and principles of airplane, 153-169 Fiat, 183 first balloon, 51 Gnome, 111, 121, 154, 159 Liberty, 168, 182 Rolls-Royce, 182 Wright's, 89, 153 Esnault-Pelterie, 114 Fabrics: calico, 60, 61 cotton, 18, 164 linen, 9 oil silk, 11 rubber, 61, 63 Farman airplane, 108, 110, 112, 116, 178, 181 Farman, Henry, 102, 103, 110-112, 115, 123, 154 Fiat motor, 183 Field of Mars, 10 Fokker airplane, 172, 192-194, 203 Fonck, René, 212-214 Franklin, Benjamin, 11 Friedrichshafen airplane, 199 Fullard, Capt. Philip F., 215 Fuselage, development of, 122, 165-166 Garnerin, André, 30 Gases: coal, 16 hydrogen, 9, 21 Genet, Edmond, 218 Giffard, 50 Gliders, 81-88, 100 Gnome engine, 111, 121, 154, 159 Goertz range finder, 147 Goodyear Tire and Rubber Co., 43 Gotha airplane, 197-199, 203 Grahame-White, Claude, 116 Grapnel, balloon, 19 _Great Nassau_, 22 Green, Charles, 22, 31 Gross, Major von, 66 Guffroy, 114 Gun-tunnel Gotha, 197-199 Guynemer, Georges, 137, 172, 205-214 Haenlein, Paul, 52 Halberstadt airplane, 196, 203 Handley-Page airplane, 181, 182 Hargrave, 85 Hat-in-the-Ring Squadron, 221 Hawker, Harry, 244 Head resistance, airplane, 96, 151, 160 Hitchcock, Hon. Frank H., 249 Hoop, balloon, 18 _Hopper_, 125 Immelmann, 176, 194, 215, 219 Jeffries, Dr., 12 Jouillot, 60 _June Bug_, 107 Juvisy meeting, 115 Kite balloon, 19, 36-44 Kites: principles of, 79, 91 Lilienthal's, 81, 86 Krebs, 53 Kuparanto, R. Jordarki, 30 Lafayette Escadrille, 172, 216, 217 Lahm, Lieut. Frank P., 26 Lambert, Comte de, 108, 115 Landing problems, 165-167, 240 _Langley_, 182 Latham, Hubert, 104, 108, 109 Lebaudy Brothers, 60-67 Lefevre, 108 Letord airplane, 181 Liberty motor, 168, 182 Lilienthal, Otto, 81-85, 92 Little, Robert A., 215 Lôme, Dupuy de, 52 Loubet, President, 58 Lufbery, Major, 205, 216, 217 Lunardi, Vincent, 12, 20-22 L. V. W. airplane, 203 Malone, Lieut. John J., 215 Materials, airplane, problem of, 163, 164 McCudden, Capt. James, 205, 215 McCurdy, J. A. D., 106 Meusnier, General, 49 Michelin cup, 115 Moineau airplane, 179, 181 Monoplane, principles of, 150-151 Montgolfier Brothers, 3-11 Morane airplane, 119, 192 Moret, 21 Motor (see _engine_) _NC-4_, 244 Neck, balloon, 18 Net balloon, 18 Nieuport airplane, 121, 171, 211 Nomenclature of airplane, 94 Normand, Le, 29 _Nulli Secundus_, 64, 65, 68