And someone shouted from the world, 306; pedals, 298; pipes, 295; pipes, arrangement of, 295; sound-board, _296_; wind-chest, 297. Otto cycle, 91. Overtones, 285. Pallets of organ, 296; board of organ, 303. Bioscope, 266. Blades, turbine, _81_, 83. Block system, 201, 212. Blood.