65 with a section removed, 107 67. Diagram showing real path of a bird, 108 68. The De la Grange machine on the ground, 111 69. The De la Grange machine in full flight, 111 70. Farman’s machine in flight, 112 71. Bleriot’s machine, 113 72. Santos Dumont’s flying machine, 113 72_a_. Angles and degrees compared, 115 72_b_. Diagram showing direction of the air with a thick curved aeroplane, 118 72_c_. Aeroplanes experimented with by Mr. Horatio Philipps, 118 73. The enormous balloon “Ville de Paris,” 123 74. Photograph of a model of my machine, 130 75. The fabric-covered aeroplane experimented with, 131 76. The forward rudder of my large machine showing the fabric attached to the lower side, 131 77. View of the track used in my experiments, 134 78. The machine on the track tied up to the dynamometer, 135 79. Two dynagraphs, 136 80. The outrigger wheel that gave out and caused an accident with the machine, 137 81. Shows the broken planks and the wreck that they caused, 138 82. The condition of the machine after the accident, 139 83. This shows the screws damaged by the broken planks, 140 84. This shows a form of outrigger wheels which were ultimately used, 141 85. One pair of my compound engines, 142 86. Diagram showing the path that the air has to take in passing between superposed aeroplanes in close proximity to each other, 144 87. Position of narrow aeroplanes arranged so that the air has free passage between them, 145 88. The very narrow aeroplanes or sustainers employed by Mr. Philipps, 146 89. One of the large screws being hoisted into position, 149 90. Steam boiler employed in my experiments, 157 91. The burner employed in my steam experiments, 157 92. Count Zeppelin’s aluminium-covered airship coming out of its shed on Lake Constance, 161 93. Count Zeppelin’s airship in full flight, 161 94. The new British war balloon “Dirigible” No. 2, 162 95. The Wright aeroplane in full flight, 162