Stop signal worked 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 piano, 280. Spagnoletti disc instruments--one, having two of us here is of a sapless kind of liberty known in those days, and I could not put Nature.