Organ Pipe Mouthpiece
   Here are two examples of the "mouth-piece of [an] organ pipe, with movable over lip ... 9 francs", which is item number 12 in the 1889 Koenig catalogue. Both are at the University of Toronto.
   This is essentially the same as the instruments above, with a resonator added. The 1889 Koenig catalogue lists this as "pipe with movable lip ... 20 francs"; it is item number 94 in the catalogue. It is in the collection of the University of Toronto. In both cases, the experimenter can work with the edge tones produced when a thin blade of air strikes a sharp edge. 

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